Climatological Report (Monthly)
Issued by NWS Marquette, MI

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000
CXUS53 KMQT 230203 AAB
CLMMQT

CLIMATE REPORT...PRELIMINARY
NATIONAL WEATHER SERVICE MARQUETTE MI
1003 PM EDT TUE SEP 22 2015

...................................

...THE MARQUETTE MI CLIMATE SUMMARY FOR THE MONTH OF AUGUST 2015...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1961 TO 2015

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              96   08/06/2001
 LOW               31   08/30/1976
HIGHEST            90   08/16        73      17       83  08/25
                                                          08/09
LOWEST             39   08/27        52     -13       42  08/28
AVG. MAXIMUM     73.7              74.3    -0.6     71.3
AVG. MINIMUM     54.3              53.1     1.2     52.0
MEAN             64.0              63.7     0.3     61.7
DAYS MAX >= 90      1               0.5     0.5        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               0.0     0.0        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         8.59   1988
 MINIMUM         0.44   2008
TOTALS           2.70              3.05   -0.35     4.47
DAILY AVG.       0.09              0.10   -0.01     0.14
DAYS >= .01        11              10.7     0.3       12
DAYS >= .10         9               6.1     2.9       10
DAYS >= .50         1               1.9    -0.9        1
DAYS >= 1.00        0               0.7    -0.7        1
GREATEST
 24 HR. TOTAL    0.73   08/09 TO 08/10

SNOWFALL (INCHES)
RECORDS
 TOTAL              T   2009
TOTALS            0.0               0.0     0.0      0.0
SINCE 7/1         0.0               0.0     0.0        T
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= 1.0         0               0.0     0.0        0
GREATEST
 SNOW DEPTH         0   MM                             0  MM
 24 HR TOTAL      0.0   08/31 TO 08/31

DEGREE_DAYS
HEATING TOTAL     100               106      -6      126
 SINCE 7/1        168               185     -17      247
COOLING TOTAL      74                66       8       31
 SINCE 1/1        182               220     -38      147
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              MM
HIGHEST WIND SPEED/DIRECTION    MM        DATE   MM
HIGHEST GUST SPEED/DIRECTION    33/225    DATE  08/22

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER             MM
NUMBER OF DAYS FAIR          MM
NUMBER OF DAYS PC            MM
NUMBER OF DAYS CLOUDY        MM

AVERAGE RH (PERCENT)     MM

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       3
LIGHT RAIN               14     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       6     FOG W/VIS <= 1/4 MILE      0
HAZE                      0

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

&&

...AUGUST 2015 MONTHLY CLIMATE SUMMARY FOR UPPER MICHIGAN...
/THIS DISCUSSION DOES NOT INCLUDE CHIPPEWA AND MACKINAC COUNTIES/

...GENERALLY DRY OVER THE NORTH AND WETTER ACROSS THE SOUTH...

...MONTHLY MEAN TEMPERATURE NOT FAR FROM NORMAL...

AUGUST CLIMATE STATISTICS FOR THE MARQUETTE NWS IN NEGAUNEE TOWNSHIP

                                    NORMAL   DEPARTURE
AVERAGE TEMPERATURE         64.0     63.7   PLUS    0.3
AVERAGE HIGH TEMPERATURE    73.7     74.3  MINUS    0.6
AVERAGE LOW TEMPERATURE     54.3     53.1   PLUS    1.2
HEATING DEGREE DAYS          100      106  MINUS      6
COOLING DEGREE DAYS           74       66   PLUS      8
TOTAL PRECIPITATION         2.70     3.05  MINUS   0.35
TOTAL SNOWFALL                 0        0             0

HIGHEST TEMPERATURE:                    90 ON 8/16
LOWEST TEMPERATURE:                     39 ON 8/27
GREATEST CALENDAR DAY PRECIPITATION:  0.71 ON 8/9
GREATEST 24 HOUR PRECIPITATION:       0.73 ON 8/9-8/10
GREATEST CALENDAR DAY SNOWFALL:          0
PEAK WIND SPEED: 33 MPH FROM THE SOUTHWEST ON 8/22

DAILY RECORD HIGH MINIMUM TEMPERATURE ON 8/16...69 /OLD RECORD
                                                        67...1987/
DAILY RECORD HIGH MAXIMUM TEMPERATURE ON 8/16...90 /89...1983/
DAILY RECORD LOW MAXIMUM TEMPERATURE ON 8/24...54 /56...1971&78/
DAILY RECORD LOW MAXIMUM TEMPERATURE ON 8/25...53 /57...1971&92/
---------------------------------------------------------------------
GREAT LAKES WATER LEVELS (FEET/METERS ABOVE MEAN SEA LEVEL)

                            LAKE SUPERIOR  LAKE MICHIGAN-HURON
08/01/15 DAILY MEAN         602.64/183.69     579.81/176.73
08/31/15 DAILY MEAN         602.65/183.69     579.75/176.71
AVG JUL 2015 DAILY MEAN     602.64/183.68     579.81/176.73
AVG AUG 2014 DAILY MEAN     602.59/183.67     578.99/176.48
LONG TERM AUG DAILY MEAN    602.13/183.53     579.23/176.55
MAXIMUM AUG DAILY MEAN      603.22/183.86     581.99/177.39
                                (1952)           (1986)
MINIMUM AUG DAILY MEAN      600.43/183.01     576.67/175.77
                                (2007)           (1964)

...GREAT LAKES WATER LEVELS REMAIN WELL ABOVE NORMAL IN AUGUST...

WATER LEVELS ON THE WESTERN GREAT LAKES REMAINED NEARLY STEADY IN
AUGUST AS LIMITED EVAPORATION CAUSED BY RELATIVELY CHILLY WATER
TEMPERATURES OFFSET GENERALLY BELOW NORMAL RAINFALL AND RUNOFF IN
THE LAKES DRAINAGE BASINS. AT THE END OF AUGUST...WATER LEVELS ON
LAKE SUPERIOR WERE 6 TO 7 INCHES ABOVE NORMAL AND NEARLY 1 INCH
HIGHER THAN THE AUGUST AVERAGE IN 2014. THE LEVEL ON LAKES MICHIGAN
AND HURON WAS 6 TO 7 INCHES ABOVE AVERAGE ON 8/31 AND 9 TO 10 INCHES
HIGHER THAN DURING AUGUST 2014.

OBTAIN GREAT LAKES WATER LEVEL DATA AS REPORTED BY THE U.S. ARMY
CORPS OF ENGINEERS AT

HTTP://WWW.LRE.USACE.ARMY.MIL/MISSIONS/GREATLAKESINFORMATION/
       GREATLAKESWATERLEVELS/CURRENTCONDITIONS.ASPX (ALL LOWER CASE).
---------------------------------------------------------------------
                        AUGUST CLIMATE HIGHLIGHTS

HIGHEST REPORTED TEMPERATURE...95 AT MUNISING ON 8/16

LOWEST REPORTED TEMPERATURE...32 NEAR COVINGTON IN BARAGA COUNTY
                               ON 8/27

HIGHEST AVERAGE TEMPERATURE...66.4 DEGREES AT HARVEY IN MARQUETTE
                               COUNTY

LOWEST AVERAGE TEMPERATURE...61.7 DEGREES AT CLARKSBURG IN
                              MARQUETTE COUNTY

HIGHEST MONTHLY PRECIPITATION...5.45 INCHES AT AMASA IN IRON COUNTY

LOWEST MONTHLY PRECIPITATION...1.67 INCHES AT BARAGA

AUGUST 2015 FEATURED A CHANGEABLE WEATHER PATTERN...WITH SOME
PERIODS OF VERY WARM AND COOL WEATHER. SINCE THE POSITIVE AND
NEGATIVE TEMPERATURE ANOMALIES DURING THE MORE EXTREME PERIODS
TENDED TO BALANCE OUT...THE MEAN AUGUST TEMPERATURE ENDED UP WITHIN
A DEGREE OF NORMAL AT MOST PLACES. THESE AVERAGE MONTHLY
TEMPERATURES RANGING BETWEEN ABOUT 62 AND 66 DEGREES RAN ABOUT 1 TO
2 DEGREES LOWER THAN THE JULY AVERAGES AT MOST PLACES.

THE COOLEST PERIODS IN AUGUST WERE DURING THE FIRST AND ESPECIALLY
THE FOURTH WEEKS. THE COOL NORTHWEST FLOW AROUND A DEEP LOW PRESSURE
SYSTEM MORE TYPICAL OF FALL AND WHICH MOVED OVER ONTARIO ADVECTED
CANADIAN AIR INTO THE UPPER LAKES ON 8/23 INTO 8/27. MEAN DAILY
TEMPERATURES DURING THIS PERIOD FELL AS LOW AS 10 TO 15 DEGREES
BELOW NORMAL. SINCE THERE WERE PLENTY OF CLOUDS...THE DAYTIME HIGH
TEMPERATURE ANOMALIES WERE MOST EXTREME. HIGH TEMPERATURES IN THE
50S WERE COMMON ON 8/24 AND 8/25...AND ALSO OCCURRED ON 8/26 AT A
FEW PLACES OVER THE EAST. THESE HIGH TEMPERATURES ARE AS MUCH AS 20
TO 25 DEGREES BELOW NORMAL AND SET NEW DAILY RECORD LOW MAXIMUMS AT
A NUMBER OF LOCATIONS. AS THE CANADIAN HIGH PRESSURE MOVED OVERHEAD
EARLY ON 8/27...MANY INLAND PLACES SAW THE MERCURY SINK INTO THE
CHILLY 30S...INCLUDING THE MONTHLY LOW OF 32 NEAR COVINGTON IN
BARAGA COUNTY. THE COOL SHOT OF CANADIAN AIR THAT DOMINATED FROM 8/3
TO 8/7 DROPPED MEAN DAILY TEMPERATURES AS MUCH AS 10 DEGREES BELOW
AVERAGE ON 8/4. SOME OF THE COOLER INLAND LOCATIONS REPORTED A LOW
TEMPERATURE IN THE 30S AT DAYBREAK ON 8/5.

THE WARMEST TIME IN AUGUST WAS AROUND MID MONTH...WHEN AN UPPER
RIDGE OVER THE PLAINS EXPANDED EAST INTO THE GREAT LAKES. MEAN DAILY
TEMPERATURES ON 8/13 THROUGH 8/16 AVERAGED 10 TO 15 DEGREES ABOVE
NORMAL. THE MERCURY REACHED 90 OR HIGHER AT AT LEAST A COUPLE
LOCATIONS ON 8/14...8/15 AND 8/16. THE AFTERNOON ON 8/16 WAS WARMEST
AND FEATURED THE MONTHLY HIGHEST TEMPERATURE OF 95 REPORTED NEAR
MUNISING. THE LAST COUPLE DAYS OF AUGUST ALSO TURNED VERY WARM AS AN
UPPER RIDGE BUILT BACK INTO THE GREAT LAKES FOLLOWING THE RETREAT OF
THE DEEP TROUGH RESPONSIBLE FOR THE VERY COOL PERIOD AROUND 8/25. A
FEW SPOTS SAW THE THERMOMETER REACH 90 IN THE AFTERNOON ON 8/31...
WHEN THE MEAN DAILY TEMPERATURE ROSE TO 10 DEGREES ABOVE NORMAL.

AUGUST WAS A GENERALLY DRY MONTH ACROSS THE NORTHEAST HALF OF UPPER
MICHIGAN BUT WETTER TOWARD THE WISCONSIN BORDER...AN AREA WHICH WAS
IMPACTED MORE FREQUENTLY BY THE TYPICALLY VARIABLE SUMMER-TIME
CONVECTION. MOST PLACES PICKED UP 2.00 TO 3.50 INCHES OF RAIN DURING
THE MONTH...ABOUT 75 TO 100 PERCENT OF THE AUGUST NORMAL. WITHIN THE
DRIER NORTHEAST HALF...BARAGA AND NEWBERRY REPORTED ONLY 1.67 AND
1.73 INCHES OF RAIN RESPECTIVELY...ABOUT 50 PERCENT OF NORMAL.
CLOSER TO THE WISCONSIN BORDER...AMASA IN IRON COUNTY WAS INUNDATED
WITH 5.45 INCHES OF RAIN.

A STRONG UPPER DISTURBANCE PASSING THROUGH THE UPPER GREAT LAKES
INTERACTED WITH AN UNSTABLE AIRMASS IN PLACE AND INITIATED AN
OUTBREAK OF SEVERE THUNDERSTORMS ON 8/2. THE STRONGEST STORMS
BOMBARDED SOME PLACES IN ALGER AND DELTA COUNTIES WITH HAIL AS LARGE
AS 1.5 INCHES IN DIAMETER. WIND GUSTS AS HIGH AS 63 MPH STRUCK THE
AREA AROUND MENOMINEE AND CAUSED SOME DAMAGE. ADDITIONAL
THUNDERSTORMS THAT FORMED ALONG A SLOW MOVING COLD FRONT DROPPED
HEAVY RAIN ON PORTIONS OF THE SOUTH CENTRAL ON 8/9. AMASA REPORTED
3.63 INCHES OF RAIN DURING THIS ONE EVENT...A LARGE PORTION OF THE
HIGH MONTHLY PRECIPITATION TOTAL THERE. A WEAK COLD FRONT DROPPING
INTO THE UPPER LAKES INITIATED SOME SEVERE THUNDERSTORMS OVER THE
SOUTH CENTRAL IN THE EVENING ON 8/14. HAIL AS LARGE AS GOLF BALLS
FELL AT A FEW SPOTS IN DELTA AND MENOMINEE COUNTIES DURING THIS
EVENT. A COLD FRONT CROSSING THE AREA DURING THE NIGHT ON 8/16-8/17
THAT ENDED THE MID-MONTH WARM SPELL CAUSED A SEVERE THUNDERSTORM
THAT DROPPED QUARTER-SIZED HAIL AT A FEW PLACES IN DELTA COUNTY.

A BAND OF SHOWERS AND THUNDERSTORMS AHEAD OF THE STRONG UPPER
DISTURBANCE AND ATTENDANT COLD FRONT AT THE LEADING EDGE OF THE
CHILLY CANADIAN AIRMASS RESPONSIBLE FOR THE COOL FOURTH WEEK DROPPED
SOME LOCALLY HEAVY RAIN IN EXCESS OF AN INCH AT A FEW SPOTS ON 8/23.
SOME OF THE STRONGER STORMS ALSO CAUSED WIND GUSTS UP TO 50 TO 55
MPH IN DELTA COUNTY. ADDITIONAL HEAVY RAIN IN EXCESS OF AN INCH FELL
OVER THE KEWEENAW ON 8/24 ASSOCIATED WITH THE DEEP LOW PRESSURE
SYSTEM THAT WAS MOVING INTO ONTARIO.
---------------------------------------------------------------------
                ...JUNE-AUGUST 2015 MEAN TEMPERATURE...

          ...SUMMER A BIT COOLER THAN NORMAL AT MOST PLACES...

               OBSERVED  NORMAL  DEPARTURE     RECORD      2015 RANK

MANISTIQUE       61.7     63.0     -1.3     57.8 /1992/  22ND COOLEST

MUNISING         60.8     62.8     -2.0     56.0 /1920/  23RD COOLEST

MARQUETTE CITY   62.9     64.4     -1.5     58.6 /1915/      ****

IRON MOUNTAIN    65.3     66.0     -0.7     61.8 /1927/      ****

MARQUETTE NWS    62.7     63.3     -0.6     57.9 /1992/      ****

NEWBERRY         63.1     63.6     -0.5     57.9 /1992/      ****

IRONWOOD         63.3     63.8     -0.5     58.2 /1992/      ****

HOUGHTON         62.8     62.7     +0.1     57.7 /1950/      ****

**** NOT IN TOP 25

ALTHOUGH MEAN MONTHLY TEMPERATURES IN JULY AND AUGUST WERE WITHIN A
DEGREE OF NORMAL AT MOST PLACES...JUNE WAS COOLER THAN NORMAL ACROSS
UPPER MICHIGAN. THIS CHILL WAS MOST PRONOUNCED OVER THE EAST HALF
NEAR THE GREAT LAKES BECAUSE EXTENSIVE WINTER ICE COVER LINGERED
OVER THE SURROUNDING LAKE WATERS LONGEST INTO SPRING...HOLDING DOWN
LAKE TEMPERATURES AND MODERATING THE SEASONAL WARMUP OVER THE LAND
AREAS NEAR THE SHORE. BECAUSE JUNE WAS COOLER AT MANISTIQUE AND
MUNISING...THE OVERALL SUMMER 2015 MEAN TEMPERATURE AT THOSE PLACES
ENDED UP WITHIN THE TOP 25 LOWEST ON RECORD. ALTHOUGH THE JUNE CHILL
RESULTED IN A COOLER THAN NORMAL SUMMER AT MOST OTHER LOCATIONS...
THE COOL WEATHER WAS NOT AS ANOMALOUS.

                ...JUNE-AUGUST 2015 PRECIPITATION...

            ...SUMMER DRIER THAN NORMAL AT MOST PLACES...

               OBSERVED  NORMAL  DEPARTURE     RECORD      2015 RANK

MANISTIQUE       5.68     8.86     -3.18    4.35 /1983/   6TH LOWEST

MARQUETTE NWS    6.89     8.73     -1.84    5.14 /2007/  12TH LOWEST

NEWBERRY         7.02     9.31     -2.29    3.50 /1905/  18TH LOWEST

MARQUETTE CITY   7.42     8.13     -0.71    3.53 /1892/      ****

HOUGHTON         7.03     7.48     -0.45    4.32 /2007/      ****

MUNISING         8.76     9.11     -0.35    4.08 /1919/      ****

IRONWOOD        10.87    11.13     -0.26    2.36 /1907/      ****

IRON MOUNTAIN   10.24    10.19     +0.05    4.27 /1937/      ****

**** NOT IN TOP 25

SUMMER 2015 ENDED UP DRIER THAN NORMAL OVER MOST OF UPPER MICHIGAN.
THE ONE EXCEPTION WAS THE AREA NEAR THE WISCONSIN BORDER...WHERE THE
TYPICALLY HIT-OR-MISS THUNDERSTORMS WERE MORE FREQUENT AWAY FROM THE
STABILIZING INFLUENCE OF THE GREAT LAKES. JUNE THROUGH AUGUST
PRECIPITATION WAS AT LEAST CLOSER TO NORMAL IN THIS REGION.
---------------------------------------------------------------------
SOME OTHER TEMPERATURE AND PRECIPITATION OBSERVATIONS ACROSS UPPER
MICHIGAN IN AUGUST 2015 INCLUDE:

IRONWOOD...AVERAGE TEMPERATURE 63.2 (0.9 DEGREE BELOW NORMAL)
           PRECIPITATION 2.56 INCHES (0.81 INCHES BELOW NORMAL)

WATERSMEET (GOGEBIC COUNTY)...PRECIPITATION 3.69 INCHES

GREENLAND (ONTONAGON COUNTY)...AVERAGE TEMPERATURE 63.0 DEGREES
                               PRECIPITATION 2.55 INCHES

BERGLAND DAM (ONTONAGON COUNTY)...AVERAGE TEMPERATURE 62.8 DEGREES
                                  PRECIPITATION 2.69 INCHES

HOUGHTON COUNTY...AVERAGE TEMPERATURE 64.5 (0.6 DEGREE ABOVE NORMAL)
 AIRPORT          PRECIPITATION 2.51 INCHES (0.10 INCH ABOVE NORMAL)

MOHAWK (KEWEENAW COUNTY)...PRECIPITATION 3.07 INCHES

COPPER HARBOR...AVERAGE TEMPERATURE 65.5 DEGREES
                PRECIPITATION 2.23 INCHES

JACOBSVILLE (HOUGHTON COUNTY)...AVERAGE TEMPERATURE 63.2 DEGREES
                                PRECIPITATION 1.84 INCHES

BARAGA...AVERAGE TEMPERATURE 65.1 DEGREES
         PRECIPITATION 1.67 INCHES

HERMAN (BARAGA COUNTY)...PRECIPITATION 2.80 INCHES

CLARKSBURG (MARQUETTE COUNTY)...AVERAGE TEMPERATURE 61.7 DEGREES
                                PRECIPITATION 2.43 INCHES

MARQUETTE CITY...AVERAGE TEMPERATURE 66.2 (0.4 DEGREE BELOW NORMAL)
                 PRECIPITATION 2.99 INCHES (0.36 INCH ABOVE NORMAL)

HARVEY (MARQUETTE COUNTY)...AVERAGE TEMPERATURE 66.4 DEGREES
                            PRECIPITATION 1.70 INCHES

CHATHAM (ALGER COUNTY)...AVERAGE TEMPERATURE 64.6 DEGREES
                         PRECIPITATION 1.86 INCHES

MUNISING...AVERAGE TEMPERATURE 63.4 (1.1 DEGREES BELOW NORMAL)
           PRECIPITATION 2.33 INCHES (1.15 INCHES BELOW NORMAL)

NEWBERRY...AVERAGE TEMPERATURE 64.7 (0.1 DEGREE ABOVE NORMAL)
           PRECIPITATION 1.73 INCHES (1.50 INCHES BELOW NORMAL)

STAMBAUGH (IRON COUNTY)...AVERAGE TEMPERATURE 61.9 DEGREES
                          PRECIPITATION 3.56 INCHES

AMASA (IRON COUNTY)...AVERAGE TEMPERATURE 63.6 DEGREES
                      PRECIPITATION 5.45 INCHES

FORD AIRPORT...AVERAGE TEMPERATURE 65.6 DEGREES
 NEAR IRON MOUNTAIN

IRON MOUNTAIN...AVERAGE TEMPERATURE 65.8 (0.6 DEGREE BELOW NORMAL)
                PRECIPITATION 3.41 INCHES (0.15 INCH ABOVE NORMAL)

NORWAY (DICKINSON COUNTY)...AVERAGE TEMPERATURE 65.6 DEGREES
                            PRECIPITATION 3.30 INCHES

DAGGETT (MENOMINEE COUNTY)...PRECIPITATION 3.16 INCHES

MENOMINEE...PRECIPITATION 3.88 INCHES

ESCANABA...PRECIPITATION 3.03 INCHES

GLADSTONE (DELTA COUNTY)...PRECIPITATION 3.46 INCHES

GARDEN CORNERS (DELTA COUNTY)...AVERAGE TEMPERATURE 63.9 DEGREES
                                PRECIPITATION 3.69 INCHES

COOKS (SCHOOLCRAFT COUNTY)...PRECIPITATION 3.45 INCHES

MANISTIQUE...AVERAGE TEMPERATURE 64.0 (0.6 DEGREE BELOW NORMAL)
             PRECIPITATION 2.60 INCHES (0.65 INCH BELOW NORMAL)

                         AUGUST WEATHER SUMMARY

AUGUST BEGAN ON A VERY PLEASANT NOTE WITH A DRY WEST WIND ON THE
NORTHERN FLANK OF HIGH PRESSURE MOVING THROUGH THE OHIO RIVER
VALLEY. MEAN DAILY TEMPERATURES ON 8/1 WERE NOT FAR FROM NORMAL. BUT
THE APPROACH OF A STRONG DISTURBANCE AND ITS ATTENDANT COLD FRONT
THAT WERE ROTATING AROUND A DEEP LOW PRESSURE SYSTEM NEAR HUDSON BAY
BROUGHT NUMEROUS SHOWERS AND THUNDERSTORMS TO UPPER MICHIGAN DURING
THE MORNING AND INTO THE AFTERNOON ON 8/2. A NUMBER OF THE STORMS
TURNED SEVERE...DROPPING HAIL AS LARGE AS PING PONG AND GOLF BALLS
ON GLADSTONE...PERKINS AND RAPID RIVER IN DELTA COUNTY...KIVA IN
ALGER COUNTY...CRYSTAL FALLS IN IRON COUNTY AND CHAMPION IN
MARQUETTE COUNTY. ONE STORM ALSO CAUSED WIND GUSTS UP TO 63 MPH AND
DAMAGE NEAR MENOMINEE. MANY PLACES PICKED UP AT LEAST 0.25 TO 0.50
INCH OF RAIN DURING THIS EVENT. GARDEN CORNERS IN DELTA COUNTY
REPORTED THE MOST PRECIPITATION...1.15 INCHES. THE PASSAGE OF THE
COLD FRONT LATER ON 8/2 ENDED ANY LINGERING SHOWERS AND STORMS AND
BROUGHT A RETURN OF COOLER WEATHER. THE THERMOMETER AVERAGED NEAR
NORMAL ON 8/2.

SOME WEAK DISTURBANCES ROTATING AROUND A FAIRLY DEEP UPPER TROUGH
EXTENDING FROM HUDSON BAY INTO THE EASTERN STATES BROUGHT SOME
CLOUDS AND SCATTERED SHOWERS ON 8/3 AND 8/4. A FEW LOCATIONS PICKED
UP AS MUCH AS ABOUT 0.25 INCH OF RAIN ON EACH OF THESE TWO DAYS...
BUT MOST PLACES THAT SAW THE SHOWERS REPORTED LESS THAN 0.10 INCH.
THE COMBINATION OF THE CLOUDS AND COOLER CANADIAN AIR DEPRESSED MEAN
DAILY TEMPERATURES TO 5 TO 10 DEGREES BLOW NORMAL ON 8/3 AND 8/4.
HIGH PRESSURE TRAILING THE LAST OF THESE DISTURBANCES MOVED OVER THE
UPPER LAKES DURING THE NIGHT ON 8/4-8/5...BRINGING CLEARING SKIES.
WITH LIGHT WINDS...TEMPERATURES AT SOME OF THE COOLER INLAND SPOTS
DIPPED INTO THE 30S AND AS LOW AS 36 NEAR COVINGTON IN BARAGA COUNTY
AT DAYBREAK ON 8/5. CLEAR TO PARTLY CLOUDY CONDITIONS AND PLEASANTLY
COOL TEMPERATURES ASSOCIATED WITH THE HIGH THEN PREVAILED THROUGH
8/6. MEAN DAILY TEMPERATURES BETWEEN 5 AND 10 DEGREES BELOW AVERAGE
ON 8/5 REBOUNDED TO JUST A FEW DEGREES BELOW NORMAL ON 8/6.

INCREASING CLOUDS DURING THE NIGHT ON 8/6-8/7 HERALDED THE APPROACH
OF ANOTHER LOW PRESSURE SYSTEM. SHOWERS AHEAD OF THIS FEATURE MOVED
INTO WESTERN UPPER MICHIGAN AROUND DAYBREAK ON 8/7 AND THEN SPREAD
SLOWLY TO THE EAST DURING THE DAY. THE SHOWERS THEN DIMINISHED WEST-
TO-EAST LATE ON 8/7 INTO EARLY 8/8 AS THE LOW PRESSURE TROUGH
WEAKENED. RAINFALL RANGED FROM LESS THAN 0.10 INCH OVER THE EAST
FROM MUNISING TO NEWBERRY TO 0.50 INCH OR MORE IN AN AREA FROM
ONTONAGON TO BARAGA. PELKIE IN BARAGA COUNTY LED REPORTING STATIONS
WITH 0.78 INCH. AFTER THE RAIN ENDED...SOME PATCHY FOG DEVELOPED
DURING THE EARLY MORNING HOURS ON 8/8. WEAK HIGH PRESSURE MOVED OVER
THE UPPER LAKES ON 8/8...BRINGING A RETURN OF SOME SUNSHINE. THE
CLOUDS AND RAIN SHOWERS ON 8/7 HELD MEAN DAILY TEMPERATURES UP TO 5
DEGREES BELOW NORMAL. READINGS REBOUNDED TO A FEW DEGREES ABOVE
AVERAGE ON 8/8 WITH THE RETURN OF THE SUNSHINE.

THE RETURN TO DRY WEATHER WAS A BRIEF ONE. SOME SHOWERS AND A FEW
THUNDERSTORMS WELL AHEAD OF ANOTHER DISTURBANCE AND COLD FRONT
MOVING INTO MINNESOTA ARRIVED OVER THE WEST IN THE EARLY MORNING ON
8/9. THESE SHOWERS AND STORMS TENDED TO DIMINISH AS THEY MOVED INTO
THE CENTRAL UPPER PENINSULA. MORE REDEVELOPED IN THE AFTERNOON WITH
DAYTIME HEATING AS THE FRONT DREW CLOSER. THE SHOWERS AND STORMS
THEN DIMINISHED DURING THE NIGHT OVER ALL BUT THE FAR SOUTHEAST ON
8/9-8/10 AS THE COOL FRONT SLOWLY CROSSED THE AREA...BUT PATCHY FOG
DEVELOPED WITH LINGERING LOW LEVEL MOISTURE. SOME OF THE SHOWERS AND
STORMS DROPPED SOME TORRENTIAL RAINS. A NUMBER OF PLACES SAW AN INCH
OR MORE OF PRECIPITATION...WITH AS MUCH AS 3.63 INCHES FALLING AT
AMASA IN IRON COUNTY. AFTER LINGERING SHOWERS ENDED OVER THE
SOUTHEAST EARLY ON 8/10...DRYING ASSOCIATED WITH BUILDING CANADIAN
HIGH PRESSURE DELIVERED INCREASING SUNSHINE. DRY...COOLER WEATHER
THEN WAS THE RULE INTO 8/12 WITH THE HIGH DOMINATING. THE MERCURY
RAN NEAR NORMAL ON 8/10...BUT THEN AVERAGE READINGS FELL OFF TO
AROUND 5 DEGREES BELOW NORMAL ON 8/11. THE MORNING ON 8/12 WAS A
COOL ONE WITH SOME INTERIOR LOCATIONS REPORTING LOW TEMPERATURES
NEAR 40.

A WARMER AND MOISTER SOUTHWEST FLOW THEN DEVELOPED ON 8/12 AS THE
CANADIAN HIGH PRESSURE SYSTEM SANK INTO THE LOWER GREAT LAKES.
CLOUDS INCREASED...AND A FEW SPRINKLES DEVELOPED ACROSS UPPER
MICHIGAN. MORE SHOWERS AND A FEW THUNDERSTORMS IMPACTED WESTERN
UPPER MICHIGAN IN THE MORNING ON 8/13. ALTHOUGH THESE TENDED TO
DIMINISH...MORE SCATTERED SHOWERS AND STORMS ACCOMPANIED BY SOME
LOCALLY HEAVY RAIN POPPED OVER MAINLY THE CENTRAL AND EAST IN THE
AFTERNOON WITH DAYTIME HEATING. BY THE TIME THESE SHOWERS DIMINISHED
IN THE EVENING ON 8/13...MARQUETTE PICKED UP AS MUCH AS 0.54 INCH OF
RAIN. SOME LOCATIONS IN RURAL AREAS WEST OF NEWBERRY SAW UP TO 2.00
INCHES OF RAIN. DESPITE SOME CLEARING DURING THE NIGHT ON 8/13-
8/14...A STEADY SOUTHWEST WIND HELD OVERNIGHT LOWS WELL ABOVE
NORMAL. AT IRONWOOD...THE MERCURY FELL NO LOWER THAN 70. A NEAR
NORMAL MEAN DAILY TEMPERATURE ON 8/12 ROSE TO 10 TO 15 DEGREES ABOVE
AVERAGE ON 8/13.

AFTER THE WARM EARLY MORNING...TEMPERATURES IN THE AFTERNOON ON 8/14
ROSE WELL INTO THE 80S AND EVEN TO AROUND 90 AT A FEW SPOTS...
INCLUDING 92 AT STONINGTON IN DELTA COUNTY. AS A WEAK COLD FRONT
SANK INTO THE UPPER LAKES AND INTERACTED WITH THIS WARM...UNSTABLE
AIRMASS...SOME SHOWERS AND THUNDERSTORMS DEVELOPED OVER THE SOUTH
CENTRAL IN THE AFTERNOON. SOME OF THESE STORMS WERE SEVERE AND
DROPPED GOLF BALL-SIZED HAIL AT A SPOT IN DELTA COUNTY JUST SOUTH OF
TRENARY AND AT MENOMINEE. ARNOLD IN SOUTHERN MARQUETTE COUNTY
REPORTED THE MOST RAIN WITH 0.42 INCH. ALTHOUGH THE ARRIVAL OF WEAK
HIGH PRESSURE BEHIND THE FADING COLD FRONT BROUGHT A RETURN OF
MOSTLY CLEAR AND COOLER WEATHER DURING THE NIGHT ON 8/14-8/15...THE
AFTERNOON ON 8/15 TURNED VERY WARM AGAIN. UNDER MOSTLY SUNNY
SKIES...THE THERMOMETER READ 90 OR BETTER AT SEVERAL LOCATIONS AGAIN
IN THE AFTERNOON AWAY FROM THE COOLING INFLUENCE OF THE LAKES.
READINGS PEAKED AS HIGH AS 93 AT KENTON IN FAR SOUTHERN HOUGHTON
COUNTY AND PELKIE. THE OVERNIGHT ON 8/15-8/16 WAS ANOTHER WARM ONE
AS A STEADY SOUTHWEST WIND PREVAILED TO THE NORTH OF HIGH PRESSURE
IN THE OHIO RIVER VALLEY. MINIMUM TEMPERATURES WERE AS HIGH AS 72 AT
IRONWOOD AND 70 AT COPPER HARBOR. THE PASSAGE OF MORE HUMID AIR OVER
LAKE MICHIGAN RESULTED IN AREAS OF FOG NEAR THAT BODY OF WATER IN
THE EARLY MORNING ON 8/16 THAT WAS LOCALLY DENSE. SOUTHWEST WINDS
GUSTING AS HIGH AS 30 MPH CONTINUED TO PUMP VERY WARM AND MORE HUMID
AIR INTO THE AREA ON 8/16. HIGH TEMPERATURES WELL INTO THE 80S AND
EVEN THE 90S WERE COMMON AWAY FROM THE COOLING INFLUENCE OF LAKE
MICHIGAN. A LOCATION NEAR MUNISING SAW THE MERCURY REACH THE MONTHLY
HIGH OF 95 IN THE AFTERNOON ON 8/16. MEAN DAILY TEMPERATURES FROM 5
TO 10 DEGREES ABOVE NORMAL ON 8/14 AND 8/15 ROSE TO AROUND 15
DEGREES ABOVE AVERAGE ON 8/16...WHICH ENDED UP AS THE WARMEST DAY OF
AUGUST AT MOST PLACES.

LOW PRESSURE MOVING THROUGH CENTRAL CANADA DRAGGED A COLD FRONT
THROUGH THE UPPER GREAT LAKES DURING THE NIGHT ON 8/16-8/17...ENDING
THE MID-MONTH WARM SPELL. SOME SHOWERS AND THUNDERSTORMS ACCOMPANIED
THE PASSAGE OF THIS FRONT AND WERE MOST NUMEROUS OVER THE SOUTH
CENTRAL IN THE EARLY MORNING ON 8/17. ONE OF THE STORMS TURNED
SEVERE AND DROPPED GOLF BALL-SIZED HAIL ON FAYETTE IN DELTA COUNTY.
THE HEAVIER RAIN IN EXCESS OF 0.50 INCH AT SOME LOCATIONS ALSO FELL
IN DELTA COUNTY...WITH UP TO 0.69 INCH AT ESCANABA. AWAY FROM THE
SOUTH CENTRAL...RAINFALL WAS GENERALLY LESS THAN 0.25 INCH DURING
THE NIGHT ON 8/16-8/17. THE COLD FRONT STALLED JUST TO THE SOUTHEAST
OF UPPER MICHIGAN ON 8/17. A LOW PRESSURE WAVE RISING ALONG THIS
BOUNDARY CAUSED MORE SCATTERED RAIN SHOWERS THAT WERE MOST NUMEROUS
NEAR LAKE MICHIGAN...WHERE THERE WERE ALSO A COUPLE OF
THUNDERSTORMS. LA BRANCHE IN MENOMINEE COUNTY SAW UP TO 0.33 INCH OF
ADDITIONAL RAINFALL. FARTHER TO THE NORTHWEST...THERE WAS SOME
SUNSHINE OVER THE KEWEENAW CLOSER TO HIGH PRESSURE MOVING ACROSS
SOUTH CENTRAL CANADA AND INTO ONTARIO. WITH THE INFLUX OF COOLER AIR
BEHIND THE FRONT...THE MERCURY AVERAGED NEAR NORMAL ON 8/17.

AS AN UPPER TROUGH DEEPENED OVER THE PLAINS...A LOW PRESSURE SYSTEM
BEGAN TO TAKE SHAPE IN THE NORTH CENTRAL PLAINS EARLY ON 8/18. THIS
LOW MOVED TO THE NORTHEAST ALONG THE STALLED FRONT JUST TO THE SOUTH
OF UPPER MICHIGAN INTO MINNESOTA ON 8/19...THEN THROUGH WESTERN LAKE
SUPERIOR AND INTO NORTHWEST ONTARIO ON 8/20. SCATTERED SHOWERS ON
8/18 BECAME A STEADY RAIN DURING THE NIGHT ON 8/18-8/19...MAINLY
OVER THE WEST CLOSER TO THE TRACK OF THE SURFACE LOW LIFTING
NORTHEAST INTO MINNESOTA. SHOWERS AND A FEW THUNDERSTORMS ON 8/19
TENDED TO DIMINISH WITH THE ARRIVAL OF DRIER AIR ALOFT AS SOUTH
WINDS GUSTED UP TO 30 TO 35 MPH AHEAD OF THE COLD FRONT ASSOCIATED
WITH THE LOW TRACKING TOWARD ONTARIO. AFTER THE FRONT PASSED THROUGH
THE WEST DURING THE AFTERNOON ON 8/19...WEST WINDS GUSTED AS HIGH AS
44 MPH AT FREDA IN HOUGHTON COUNTY. THE FRONT CLEARED THE EASTERN
U.P. BY THE EARLY MORNING HOURS ON 8/20. SCATTERED SHOWERS
ACCOMPANIED THE FRONTAL PASSAGE AND PERSISTED THROUGH THE NIGHT ON
8/19-8/20 AND EVEN INTO 8/20 ALONG WITH SCATTERED SHOWERS IN A
COOL...RELATIVELY MOIST WESTERLY FLOW AROUND THE LOW PRESSURE
DEPARTING THROUGH ONTARIO. PRECIPITATION ON 8/18 INTO 8/20 WAS
HEAVIEST OVER THE WEST...WHERE RAINFALL TOTALS EXCEEDED AN INCH AT
MANY PLACES IN ONTONAGON AND HOUGHTON COUNTIES. IRONWOOD REPORTED
THE MOST WITH 1.50 INCHES. MOST OF THE REST OF UPPER MICHIGAN SAW
0.50 TO 0.75 INCH...BUT ONLY 0.35 INCH FELL AT BARAGA. SOME HEAVIER
SHOWERS ALSO FELL NEAR LAKE MICHIGAN...WHERE MANISTIQUE PICKED UP
1.26 INCHES OF RAIN DURING THESE COUPLE OF DAYS. THE THERMOMETER
AVERAGED WITHIN A FEW DEGREES OF NORMAL ON 8/18 AND 8/19...BUT
READINGS FELL TO 5 TO 10 DEGREES BELOW AVERAGE ON 8/20 AS CANADIAN
AIR FOLLOWED THE COLD FRONT AND CLOUDS HELD DAYTIME HIGHS IN THE 50S
OVER SOME OF THE HIGHER TERRAIN LOCATIONS ACROSS THE WEST.

SKIES TURNED MOSTLY CLEAR DURING THE NIGHT ON 8/20-8/21 AS A
TRAILING HIGH PRESSURE RIDGE MOVED INTO THE UPPER LAKES. AS WINDS
DIMINISHED...TEMPERATURES FELL TO AROUND 40 AT SOME OF THE COOLER
INTERIOR SPOTS. CLEAR TO PARTLY CLOUDY AND DRY WEATHER THEN
PREVAILED ON 8/21 AND 8/22 AS THE HIGH PRESSURE CENTER DOMINATED.
BUT SINCE THE CENTER OF THE HIGH SHIFTED OVER NEW ENGLAND BY 8/22...
SOUTHWEST WINDS ADVECTED WARMER AIR INTO THE UPPER LAKES...LIFTING
MEAN DAILY TEMPERATURES TO NEAR NORMAL ON 8/21 AND 5 TO 10 DEGREES
ABOVE AVERAGE ON 8/22. SOUTHWEST WINDS GUSTING AS HIGH AS 35 TO 40
MPH ON 8/22 TOOK A BIT OF AN EDGE OFF HIGH TEMPERATURES RISING INTO
80S AWAY FROM LAKE MICHIGAN MODERATION.

A DEEP LOW PRESSURE SYSTEM ASSOCIATED WITH A POTENT UPPER AIR
DISTURBANCE CROSSING SOUTHERN CANADA MOVED INTO NORTHWEST ONTARIO
EARLY ON 8/23 AND DRAGGED A COLD FRONT THROUGH THE UPPER GREAT
LAKES. A BAND OF SHOWERS AND SOME THUNDERSTORMS AHEAD OF THIS FRONT
MOVED INTO WESTERN UPPER MICHIGAN DURING THE EARLY MORNING HOURS ON
8/23 AND THEN SPREAD ACROSS THE AREA DURING THE DAY. SOME OF THE
STRONGER STORMS CAUSED WIND GUSTS AS HIGH AS 50 TO 55 MPH NEAR LAKE
MICHIGAN AT GARDEN IN DELTA COUNTY AND PARENT BAY IN SCHOOLCRAFT
COUNTY DURING THE LATE MORNING ON 8/23. ALTHOUGH SKIES TURNED PARTLY
CLOUDY FOLLOWING THE COLD FRONTAL PASSAGE...MORE CLOUDS AND EVEN A
FEW SHOWERS MOVED BACK INTO THE WEST WITHIN A COOLER AND RELATIVELY
MOIST WEST WIND ON THE SOUTHERN FLANK OF THE LOW IN ONTARIO. MOST
PLACES PICKED UP AT LEAST 0.25 INCH OF RAIN ON 8/23...BUT AS MUCH AS
0.62 INCH FELL NEAR GLADSTONE IN DELTA COUNTY UNDER THE STRONGER
STORMS THAT IMPACTED THE SOUTH CENTRAL.

MUCH COOLER CANADIAN AIR INVADED THE UPPER GREAT LAKES DURING THE
NIGHT ON 8/23-8/24 ON THE HEELS OF WEST WINDS GUSTING AS HIGH AS 40
TO 45 MPH OVER THE KEWEENAW. THIS UNSEASONABLY CHILLY AIR CONTINUED
TO POUR INTO THE UPPER LAKES ON 8/24 AND 8/25 AS THE GUSTY WINDS
SHIFTED GRADUALLY TO THE NORTHWEST AS THE DEEP LOW IN ONTARIO MOVED
SLOWLY TO NEAR JAMES BAY. THERE WERE NUMEROUS SHOWERS OVER THE
HIGHER TERRAIN NEAR LAKE SUPERIOR AS WELL...AND THERE WAS SOME HEAVY
RAIN ACROSS THE KEWEENAW ON 8/24. AN INCH OF MORE FELL AT A FEW
PLACES OVER THE PENINSULA... WITH AS MUCH AS 1.21 INCHES AT MOHAWK
IN KEWEENAW COUNTY. MOST OTHER PLACES NEAR LAKE SUPERIOR PICKED UP
0.10 TO 0.50 INCH OF RAIN INTO 8/25...WHEN THE SHOWERS BEGAN TO
DIMINISH WEST-TO-EAST AS THE LOW MOVED FARTHER AWAY. LOCATIONS OVER
THE SOUTH CENTRAL AND NEAR THE WISCONSIN BORDER GENERALLY SAW UNDER
0.10 INCH ON 8/24 AND 8/25. EXCEPT OVER THE FAR SOUTH CENTRAL...THE
CLOUDS AND SHOWERS KEPT THE MERCURY FROM RISING NO FURTHER THAN THE
50S ON BOTH 8/24 AND 8/25... SETTING NEW DAILY RECORD LOW MAXIMUM
TEMPERATURES AT MANY LOCATIONS. AFTER A MEAN DAILY TEMPERATURE JUST
A COUPLE DEGREES BELOW NORMAL ON 8/23...READINGS RAN 10 TO 15
DEGREES BELOW AVERAGE ON BOTH 8/24 AND 8/25.

AS HIGH PRESSURE OVER THE NORTHERN PLAINS EDGED EAST INTO MINNESOTA
ON 8/26...THE CLOUDS BEGAN TO DISSIPATE BUT WERE MOST PERSISTENT
OVER THE NORTH CENTRAL AND EAST UNDER THE NORTH WIND TO THE EAST OF
THE APPROACHING HIGH CENTER. WITH THE COOL BREEZE OFF LAKE
SUPERIOR...SOME PLACES OVER THE EAST REPORTED HIGH TEMPERATURES IN
THE 50S AGAIN ON 8/26. ANY LINGERING CLOUDS OVER THE WEST HALF
CLEARED DURING THE NIGHT ON 8/26-8/27 AS THE HIGH MOVED
OVERHEAD...SETTING THE STAGE FOR A VERY CHILLY NIGHT THERE WITH
LIGHT WINDS. MINIMUM TEMPERATURES IN THE CHILLY 30S WERE COMMON AT
THE INTERIOR COLD SPOTS OVER THE WEST HALF...INCLUDING THE MONTHLY
LOW OF 32 NEAR COVINGTON IN BARAGA COUNTY. SOME FOG DEVELOPED AT
MANY INTERIOR LOCATIONS OVER THE WEST HALF. THE AFTERNOON ON 8/27
WAS MOSTLY SUNNY AND MILDER WITH THE HIGH DOMINATING. MEAN DAILY
TEMPERATURES ON 8/26 RANGED FROM ABOUT 5 DEGREES BELOW NORMAL OVER
THE WEST TO 10 TO 15 DEGREES BELOW AVERAGE OVER THE EAST. READINGS
ON 8/27 RAN ABOUT 5 DEGREES BELOW NORMAL.

ON 8/28...A HIGH PRESSURE RIDGE BETWEEN A COLD FRONT DROPPING SOUTH
THROUGH ONTARIO AND A LOW PRESSURE SYSTEM TRACKING THROUGH THE LOWER
GREAT LAKES RESULTED IN DRY WEATHER DESPITE SOME CLOUDS. A FEW
SHOWERS AND THUNDERSTORMS DID MOVE ACROSS THE KEWEENAW AND SOUTH
CENTRAL CLOSER TO THE TWO DISTURBANCES DURING THE EVENING ON 8/28...
BUT MOST PLACES REMAINED DRY THROUGH THE NIGHT ON 8/28-8/29.
STONINGTON REPORTED 0.40 INCH OF RAIN UNDER ONE OF THE HEAVIER
SHOWERS TO MOVE OVER THE SOUTH CENTRAL. UNDER A BUILDING UPPER
RIDGE...THE DAYS ON 8/29 THROUGH 8/31 WERE DOMINATED BY AN
INCREASINGLY WARM AND HUMID SOUTHWEST FLOW ON THE WESTERN FLANK OF
SURFACE HIGH PRESSURE IN THE MID ATLANTIC STATES. EXCEPT FOR SOME
FOG AND LOW CLOUDS THAT FORMED DURING THE EARLY MORNING HOURS AND
PERSISTED INTO THE FOLLOWING DAY ESPECIALLY OVER THE EAST HALF
DOWNWIND OF LAKE MICHIGAN...MOSTLY CLEAR SKIES WERE THE RULE. THERE
WAS A SLOW WARMING TREND...WITH MEAN DAILY TEMPERATURES AROUND 5
DEGREES ABOVE NORMAL ON 8/29 REACHING AROUND 10 DEGREES ABOVE
AVERAGE ON 8/31. SOME OF THE WARMER LOCATIONS OVER THE WEST SAW THE
THERMOMETER REACH 90 OR BETTER ON 8/31. PELKIE WAS THE HOT SPOT WITH
A HIGH OF 93 ON 8/31.

                          OCTOBER FORECAST

THE CLIMATE PREDICTION CENTER (CPC) IS FORECASTING A GREATER THAN
CLIMATOLOGICAL CHANCE OF AN ABOVE NORMAL MONTHLY MEAN TEMPERATURE
AND BELOW NORMAL PRECIPITATION OVER ALL OF UPPER MICHIGAN IN OCTOBER
2015.

                         OCTOBER CLIMATOLOGY

AVERAGE TEMPERATURES IN OCTOBER CONTINUE THEIR DOWNWARD SPIRAL AS
THE SUN STAYS UP LESS AND LESS EACH DAY. THE OCTOBER MEAN
TEMPERATURE ACROSS UPPER MICHIGAN IS ABOUT TEN DEGREES LOWER THAN IN
SEPTEMBER AT MOST PLACES. POSSIBLE DAILY SUNSHINE DECREASES ABOUT 3
OR 4 MINUTES EVERY DAY DURING THE TENTH MONTH FROM 703 MINUTES ON
10/1 TO 607 MINUTES ON HALLOWEEN.

ALTHOUGH AVERAGE TEMPERATURES DECREASE DURING OCTOBER...RECORD HIGH
TEMPERATURES AT MANY PLACES IN UPPER MICHIGAN ARE STILL IN THE 80S
DURING THE FIRST WEEK OF THE MONTH. IN FACT...RESIDENTS OF IRON
MOUNTAIN BASKED IN A SUMMER-LIKE HIGH OF 88 ON 10/3/92. DOWNTOWN
MARQUETTE ENJOYED A TASTE OF SUMMER EVEN AS LATE AS 10/18 IN 1950...
WHEN THE MERCURY REACHED A BALMY 86 DEGREES.

BUT BY THE END OF OCTOBER...THE ICY HAND OF WINTER USUALLY BEGINS TO
GRIP UPPER MICHIGAN HARDER AND HARDER. RECORD LOW TEMPERATURES AT
MONTHS END FALL INTO THE TEENS EVERYWHERE AND EVEN AS LOW AS THE
SINGLE NUMBERS ABOVE ZERO AWAY FROM THE WARMING INFLUENCE OF LAKE
SUPERIOR. ON 10/30/1925...IRONWOOD RECORDED A LOW OF 2 DEGREES ABOVE
ZERO. OCTOBER 2002 WAS THE COLDEST OCTOBER ON RECORD AT THE
MARQUETTE NWS...AND AMONG THE TOP TEN COLDEST AT IRONWOOD AND IRON
MOUNTAIN. MONTHLY TEMPERATURES AVERAGED 4 TO 6 DEGREES BELOW NORMAL
ACROSS UPPER MICHIGAN. OCTOBER 2009 WAS ALSO QUITE CHILLY WITH AN
AVERAGE MONTHLY TEMPERATURE 3 TO 5 DEGREES BELOW THE MEAN. MUNISING
REPORTED THE COLDEST OCTOBER ON RECORD IN 2009...AND MANY PLACES
EXPERIENCED A TOP FIVE OR TEN COLDEST TENTH MONTH.

EVEN THOUGH AVERAGE PRECIPITATION IN OCTOBER IS LOWER THAN IN
SEPTEMBER AT MOST SPOTS...THE RESIDUAL WARMTH OF LAKE SUPERIOR
USUALLY CAUSES INCREASED LAKE EFFECT RAIN AND SNOW SHOWER ACTIVITY
DURING THE TENTH MONTH. MORE NUMEROUS ARCTIC AIR MASSES PLUNGING
SOUTH FROM CANADA ARE DESTABILIZED AS THEY CROSS THE RELATIVELY WARM
WATER...RESULTING IN THE INCREASED CONVECTIVE ACTIVITY. IF THE AIR
IS COLD ENOUGH...HEAVY SNOW CAN FALL...ESPECIALLY OVER HIGHER
TERRAIN JUST DOWNWIND OF LAKE SUPERIOR. BETWEEN 10/11 AND 10/14 IN
2006...AN UNUSUALLY EARLY WINTER STORM BLASTED THE HIGHER TERRAIN OF
THE WEST HALF OF UPPER MICHIGAN WITH 20 OR MORE INCHES OF SNOW...
INCLUDING AS MUCH AS 26.6 INCHES AT TWIN LAKES IN HOUGHTON COUNTY.
IN OCTOBER 1967...ALMOST 27 INCHES OF SNOW WHITENED IRONWOOD...
INCLUDING 15 INCHES ON 10/25/67. HEAVY SNOW CAN FALL EVEN EARLIER IN
THE MONTH. ON 10/6 TO 10/8 IN 2000...UP TO A FOOT OF SNOW SMOTHERED
THE HIGHER TERRAIN OF NORTH CENTRAL UPPER MICHIGAN. BUT DURING WARM
OCTOBERS...LITTLE OR NO SNOW CAN FALL AS WELL. THE MARQUETTE NWS SAW
NO SNOW AT ALL IN OCTOBER 1971...AS DID THE HOUGHTON COUNTY AIRPORT
IN 1986.

THE SAME SURFACE HEATING AND DESTABILIZATION OF COLD AIRMASSES THAT
CAUSES LAKE EFFECT SNOW ALSO RESULTS IN INCREASED WINDINESS OVER
LAKE SUPERIOR. THE GALES OF NOVEMBER OFTEN DO COME EARLY DURING
OCTOBER.

                  OUTLOOK FOR LATE FALL INTO WINTER

THE CLIMATE PREDICTION CENTER (CPC) IS FORECASTING A GREATER THAN
CLIMATOLOGICAL CHANCE OF AN ABOVE NORMAL 3-MONTH AVERAGE TEMPERATURE
AND BELOW AVERAGE 3-MONTH PRECIPITATION OVER ALL OF UPPER MICHIGAN
IN NOVEMBER 2015 THROUGH JANUARY 2016. THESE FORECAST TEMPERATURE
AND PRECIPITATION ANOMALIES ARE DUE TO A GROWING EL NINO IN THE
TROPICAL EASTERN PACIFIC OCEAN.

GO TO HTTP://WWW.WEATHER.GOV/CLIMATE/L3MTO.PHP TO ACCESS DETAILED
LOCAL THREE-MONTH AVERAGE TEMPERATURE OUTLOOKS FOR A NUMBER OF SITES
IN UPPER MICHIGAN.

CHECK OUT HTTP://WWW.CPC.NCEP.NOAA.GOV FOR MORE INFORMATION ABOUT
THE CLIMATE PREDICTION CENTER AND MORE LONG RANGE PREDICTIONS.

NOTE THAT STATISTICS FOR THE NATIONAL WEATHER SERVICE OFFICE IN
NEGAUNEE TOWNSHIP ARE BASED ON RECORDS WHICH BEGAN IN OCTOBER 1961.
THIRTY YEAR NORMALS USED ARE FOR THE PERIOD OF 1981 THROUGH 2010.
NOTE ALL TEMPERATURES ARE IN FAHRENHEIT AND PRECIPITATION IS IN
INCHES. ALL CLIMATE DATA LISTED IN THIS PRODUCT ARE UNOFFICIAL. FOR
OFFICIAL DATA...PLEASE REFER TO THE NATIONAL CLIMATIC DATA CENTER.
ALSO NOTE THIS DISCUSSION DOES NOT INCLUDE DATA FROM CHIPPEWA AND
MACKINAC COUNTIES.

NWS MARQUETTE WEB PAGE IS AT HTTP://WWW.WEATHER.GOV/MQT (ALL LOWER
CASE). CONTACT THE NATIONAL CLIMATIC DATA CENTER AT (828) 271-4800
OR WWW.NCDC.NOAA.GOV.

$$

KC



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