Climatological Report (Monthly)
Issued by NWS Marquette, MI

Home | Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
CXUS53 KMQT 220919 AAE
CLMMQT

CLIMATE REPORT...FINAL
NATIONAL WEATHER SERVICE MARQUETTE MI
521 AM EDT SAT AUG 22 2015

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

...THE MARQUETTE MI CLIMATE SUMMARY FOR THE MONTH OF JULY 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              99   07/28/1988
                        07/19/1977
 LOW               34   07/10/1968
                        07/05/1967
HIGHEST            91   07/27        75      16       86  07/21
LOWEST             42   07/08        54     -12       43  07/10
                        07/01
AVG. MAXIMUM     77.3              76.4     0.9     72.4
AVG. MINIMUM     54.8              54.6     0.2     52.0
MEAN             66.0              65.5     0.5     62.2
DAYS MAX >= 90      1               1.3    -0.3        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         5.60   1970
 MINIMUM         0.57   1981
TOTALS           1.70              2.84   -1.14     4.18
DAILY AVG.       0.05              0.09   -0.04     0.13
DAYS >= .01         7              11.6    -4.6       13
DAYS >= .10         3               6.6    -3.6        7
DAYS >= .50         1               1.7    -0.7        4
DAYS >= 1.00        1               0.4     0.6        1
GREATEST
 24 HR. TOTAL    1.25   07/06 TO 07/06

SNOWFALL (INCHES)
RECORDS
 TOTAL              T   2007
TOTALS            0.0               0.0     0.0      0.0
SINCE 7/1         0.0               0.0     0.0      0.0
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   MM

DEGREE_DAYS
HEATING TOTAL      68                79     -11      121
 SINCE 7/1         68                79     -11      121
COOLING TOTAL     106                94      12       42
 SINCE 1/1        108               154     -46      116
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              MM
HIGHEST WIND SPEED/DIRECTION    MM        DATE   MM
HIGHEST GUST SPEED/DIRECTION    33/270    DATE  07/29

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                0     RAIN                       1
LIGHT RAIN               11     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       3     FOG W/VIS <= 1/4 MILE      1
HAZE                      0

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

&&

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

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

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

JULY CLIMATE STATISTICS FOR THE MARQUETTE NWS IN NEGAUNEE TOWNSHIP

                                    NORMAL   DEPARTURE
AVERAGE TEMPERATURE         66.0     65.5   PLUS    0.5
AVERAGE HIGH TEMPERATURE    77.3     76.4   PLUS    0.9
AVERAGE LOW TEMPERATURE     54.8     54.6   PLUS    0.2
HEATING DEGREE DAYS           68       79  MINUS     11
COOLING DEGREE DAYS          106       94   PLUS     12
TOTAL PRECIPITATION         1.70     2.84  MINUS   1.14
TOTAL SNOWFALL                 0        0             0

HIGHEST TEMPERATURE:                    91 ON 7/27
LOWEST TEMPERATURE:                     42 ON 7/1 AND 7/8
GREATEST CALENDAR DAY PRECIPITATION:  1.25 ON 7/6
GREATEST 24 HOUR PRECIPITATION:       1.25 ON 7/6
GREATEST CALENDAR DAY SNOWFALL:          0
PEAK WIND SPEED:      33 MPH FROM THE WEST ON 7/29

DAILY RECORD HIGH MAXIMUM TEMPERATURE ON 7/27...91 /OLD RECORD
                                                        88...2002/
DAILY RECORD HIGH MINIMUM TEMPERATURE ON 7/29...67 /66...1988/
---------------------------------------------------------------------
GREAT LAKES WATER LEVELS (FEET/METERS ABOVE MEAN SEA LEVEL)

                            LAKE SUPERIOR  LAKE MICHIGAN-HURON
07/01/15 DAILY MEAN         602.60/183.67     579.78/176.72
07/30/15 DAILY MEAN         602.64/183.69     579.83/176.73
AVG JUN 2015 DAILY MEAN     602.45/183.63     579.67/176.68
AVG JUL 2014 DAILY MEAN     602.55/183.66     578.94/176.46
LONG TERM JUL DAILY MEAN    602.03/183.50     579.30/176.57
MAXIMUM JUL DAILY MEAN      603.08/183.82     581.99/177.39
                                (1950)           (1986)
MINIMUM JUL DAILY MEAN      600.26/182.96     576.71/175.78
                                (1926)           (1964)

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

WATER LEVELS ON THE WESTERN GREAT LAKES REMAINED NEARLY STEADY IN
JULY 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 JULY...WATER LEVELS ON LAKE
SUPERIOR WERE 7 TO 8 INCHES ABOVE NORMAL AND ABOUT 1 INCH HIGHER
THAN THE JULY AVERAGE IN 2014. THE LEVEL ON LAKES MICHIGAN AND HURON
WAS 6 TO 7 INCHES ABOVE AVERAGE ON 7/30 AND 10 TO 11 INCHES HIGHER
THAN DURING JULY 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).
---------------------------------------------------------------------
                         JULY CLIMATE HIGHLIGHTS

HIGHEST REPORTED TEMPERATURE...95 AT PELKIE IN BARAGA COUNTY AND
                                STONINGTON IN DELTA COUNTY ON 7/27

LOWEST REPORTED TEMPERATURE...30 NEAR NEWBERRY ON 7/8

HIGHEST AVERAGE TEMPERATURE...68.6 DEGREES AT HARVEY IN MARQUETTE
                               COUNTY AND IRON MOUNTAIN

LOWEST AVERAGE TEMPERATURE...63.2 DEGREES AT CLARKSBURG/CHAMPION
                              IN MARQUETTE COUNTY

HIGHEST MONTHLY PRECIPITATION...3.57 INCHES AT MUNISING

LOWEST MONTHLY PRECIPITATION...0.95 INCHES AT MANISTIQUE

ALTHOUGH THE FIRST WEEK OF JULY FEATURED VERY COOL WEATHER OVER
UPPER MICHIGAN WITH AN UPPER TROUGH PREVAILING IN EASTERN NORTH
AMERICA...A BUILDING RIDGE IN THE PLAINS BECAME AN INCREASINGLY
DOMINANT INFLUENCE THE REST OF THE MONTH. SO EVEN THOUGH THERE WERE
SOME PERIODS OF COOLER WEATHER AT TIMES AFTER THE FIRST WEEK
FOLLOWING COLD FRONTAL PASSAGES ASSOCIATED WITH DISTURBANCES EMBEDDED
IN THE NORTHWEST FLOW ALOFT BETWEEN THE EASTERN TROUGH AND PLAINS
RIDGE...EXPANDING HOT AIR IN THE PLAINS MADE GREATER AND MORE
PERSISTENT INROADS INTO THE GREAT LAKES THROUGH THE MONTH. THE
RESULT WAS A MEAN JULY TEMPERATURE THAT ENDED UP A BIT ABOVE NORMAL
AT MOST PLACES BECAUSE THE WARMTH THE LAST WEEK OF JULY WAS A BIT
MORE ANOMALOUS THEN THE COOL WEATHER THAT PREVAILED DURING THE FIRST
WEEK. MEAN MONTHLY TEMPERATURES BETWEEN ABOUT 63 AND 69 DEGREES WERE
6 TO 12 DEGREES HIGHER THAN THE JUNE AVERAGES...WITH THE LARGER
INCREASE AT LOCATIONS NEAR THE GREAT LAKES DUE TO THE SHARP INCREASE
IN NEARSHORE WATER TEMPERATURES FROM JUNE INTO JULY.

THE COOLEST CANADIAN AIRMASS TO INVADE THE UPPER LAKES IN JULY WAS
OVERHEAD ON 7/1...WHEN THE MEAN DAILY TEMPERATURE AVERAGED ABOUT 10
DEGREES BELOW NORMAL. MORNING LOWS ON 7/1 AND 7/2 DIPPED INTO THE
30S AT SOME OF THE COOLER INTERIOR LOCATIONS. THE ARRIVAL OF A COOL
CANADIAN HIGH DURING THE NIGHT ON 7/7-7/8 ALLOWED TEMPERATURES TO
DIP INTO THE 30S AT SOME PLACES INLAND FROM THE GREAT LAKES...
INCLUDING THE MONTHLY LOW OF 30 AT A SPOT JUST NORTH OF NEWBERRY.
FOLLOWING ANOTHER COOL AIR OUTBREAK AT MID MONTH...THE THERMOMETER
READ AS LOW AS THE 30S AT SOME OF THE INLAND COOL SPOTS ON 7/15 AND
7/16. DURING THE WARM SPELL THE LAST WEEK OF JULY...READINGS SURGED
INTO THE 90S AT SOME PLACES AWAY FROM THE MODERATING INFLUENCE OF
THE GREAT LAKES ON 7/26...7/27 AND 7/28. AT SOME OF THESE
LOCATIONS...THIS WAS THE FIRST TIME SINCE AUGUST 2013 THE MERCURY
HAD REACHED 90 OR HIGHER. OVERALL...7/27 WAS THE WARMEST OF THESE
THREE DAYS AND FEATURED THE MONTHLY HIGHEST TEMPERATURE OF 95
REPORTED AT PELKIE IN BARAGA COUNTY AND STONINGTON IN DELTA COUNTY.

THE NORTHWEST FLOW ALOFT THAT PREVAILED MOST OF THE TIME BETWEEN THE
PLAINS RIDGE AND THE EASTERN TROUGH ALSO LIMITED THE INFLUXES OF
MOISTURE THAT COULD FUEL SHOWER AND THUNDERSTORM DEVELOPMENT OVER
UPPER MICHIGAN. AT MOST PLACES...THE BULK OF THE MONTHLY RAINFALL
OCCURRED DURING THE FIRST HALF OF JULY BEFORE THE UPPER RIDGE BECAME
MORE DOMINANT AND TENDED TO SUPPRESS SUMMER CONVECTION THE SECOND
HALF OF THE MONTH. IN FACT... THERE WAS ONLY ONE WIDESPREAD RAIN
EVENT OVER UPPER MICHIGAN THAT OCCURRED ON 7/6. MOST LOCATIONS
MEASURED 1.50 TO 3.00 INCHES OF RAIN IN JULY...TOTALS ABOUT 50 TO 75
PERCENT OF THE MONTHLY NORM. BUT DUE TO THE SPOTTY NATURE OF SUMMER
CONVECTION...JULY RAINFALLS AMOUNTS VARIED FROM ONLY 0.95 INCH AT
MANISTIQUE...ABOUT 30 PERCENT OF AVERAGE...TO AS MUCH AS 3.57 INCHES
AT MUNISING...ALMOST 110 PERCENT OF NORMAL AT THAT SITE.

THERE WERE WIDESPREAD REPORTS OF AN INCH OR MORE OF RAIN DURING
THE WIDESPREAD RAINFALL ON 7/6 AS A WAVE OF LOW PRESSURE MOVED
NORTHEAST ALONG A SLOWLY MOVING COLD FRONT. PRECIPITATION TOTALS
WERE GREATEST OVER THE CENTRAL UPPER PENINSULA...WHERE AS MUCH AS
2.00 INCHES FELL AT A LOCATION NEAR NEGAUNEE IN MARQUETTE COUNTY.

SEVERE WEATHER WAS RELATIVELY UNCOMMON IN JULY. SOME STRONG
THUNDERSTORMS MOVING NEAR THE WISCONSIN BORDER DURING THE EVENING ON
7/13 AHEAD OF A COLD FRONT DROPPED SOME LOCALLY HEAVY RAINS UP 1.49
INCHES NEAR QUINNESEC IN DICKINSON COUNTY. WINDS ASSOCIATED WITH
THESE STORMS GUSTED AS HIGH AS 40 MPH AT MENOMINEE. A COUPLE OF
STRONG TO SEVERE STORMS THAT STRUCK SOUTHEAST UPPER MICHIGAN DURING
THE EARLY MORNING HOURS ON 7/25 CAUSED DAMAGING WINDS NEAR ROCK IN
DELTA COUNTY AND DROPPED AS MUCH AS 1.73 INCHES OF RAIN NEAR GARDEN
CORNERS IN DELTA COUNTY. FOLLOWING A COLD FRONTAL PASSAGE EARLY ON
7/29...WEST TO NORTHWEST WINDS GUSTED AS HIGH AS 40 TO 45 MPH OVER
THE WEST THROUGH THE DAY. A THUNDERSTORM MOVING THROUGH WESTERN
UPPER MICHIGAN CAUSED WIND GUSTS AS HIGH AS 48 MPH NEAR BESSEMER IN
GOGEBIC COUNTY DURING THE AFTERNOON ON 7/30.
---------------------------------------------------------------------
SOME OTHER TEMPERATURE AND PRECIPITATION OBSERVATIONS ACROSS UPPER
MICHIGAN IN JULY 2015 INCLUDE:

IRONWOOD...AVERAGE TEMPERATURE 66.4 (0.6 DEGREE ABOVE NORMAL)
           PRECIPITATION 2.91 INCHES (1.19 INCHES BELOW NORMAL)

WATERSMEET (GOGEBIC COUNTY)...PRECIPITATION 2.03 INCHES

GREENLAND (ONTONAGON COUNTY)...AVERAGE TEMPERATURE 64.5 DEGREES
                               PRECIPITATION 2.55 INCHES

BERGLAND DAM (ONTONAGON COUNTY)...AVERAGE TEMPERATURE 65.8 DEGREES
                                  PRECIPITATION 2.17 INCHES

HOUGHTON COUNTY...AVERAGE TEMPERATURE 66.1 (1.3 DEGREES ABOVE NORMAL)
 AIRPORT          PRECIPITATION 2.51 INCHES (0.02 INCH ABOVE NORMAL)

ATLANTIC MINE (HOUGHTON COUNTY)...PRECIPITATION 2.52 INCHES

MOHAWK (KEWEENAW COUNTY)...PRECIPITATION 2.87 INCHES

COPPER HARBOR...AVERAGE TEMPERATURE 66.5 DEGREES
                PRECIPITATION 2.17 INCHES

JACOBSVILLE (HOUGHTON COUNTY)...AVERAGE TEMPERATURE 64.0 DEGREES
                                PRECIPITATION 1.82 INCHES

BARAGA...AVERAGE TEMPERATURE 67.8 DEGREES
         PRECIPITATION 1.80 INCHES

HERMAN (BARAGA COUNTY)...PRECIPITATION 2.00 INCHES

CLARKSBURG (MARQUETTE COUNTY)...AVERAGE TEMPERATURE 63.2 DEGREES
                                PRECIPITATION 1.90 INCHES

BIG BAY (MARQUETTE COUNTY)...AVERAGE TEMPERATURE 66.5 DEGREES
                             PRECIPITATION 1.52 INCHES

MARQUETTE CITY...AVERAGE TEMPERATURE 67.4 (0.8 DEGREE ABOVE NORMAL)
                 PRECIPITATION 1.80 INCHES (1.02 INCHES BELOW NORMAL)

HARVEY (MARQUETTE COUNTY)...AVERAGE TEMPERATURE 68.6 DEGREES
                            PRECIPITATION 2.03 INCHES

CHATHAM (ALGER COUNTY)...AVERAGE TEMPERATURE 66.2 DEGREES
                         PRECIPITATION 2.15 INCHES

MUNISING...AVERAGE TEMPERATURE 64.1 (0.7 DEGREE BELOW NORMAL)
           PRECIPITATION 3.57 INCHES (0.30 INCH ABOVE NORMAL)

NEWBERRY...AVERAGE TEMPERATURE 66.0 (0.4 DEGREE ABOVE NORMAL)
           PRECIPITATION 2.95 INCHES (0.15 INCH BELOW NORMAL)

STAMBAUGH (IRON COUNTY)...AVERAGE TEMPERATURE 64.0 DEGREES
                          PRECIPITATION 1.82 INCHES

AMASA (IRON COUNTY)...AVERAGE TEMPERATURE 66.1 DEGREES
                      PRECIPITATION 1.98 INCHES

FORD AIRPORT...AVERAGE TEMPERATURE 67.7 DEGREES
 NEAR IRON MOUNTAIN

IRON MOUNTAIN...AVERAGE TEMPERATURE 68.6 (0.6 DEGREE ABOVE NORMAL)
                PRECIPITATION 2.66 INCHES (0.79 INCH BELOW NORMAL)

NORWAY (DICKINSON COUNTY)...PRECIPITATION 2.66 INCHES

DAGGETT (MENOMINEE COUNTY)...PRECIPITATION 2.37 INCHES

MENOMINEE...PRECIPITATION 2.78 INCHES

ESCANABA...PRECIPITATION 1.10 INCHES

GLADSTONE (DELTA COUNTY)...PRECIPITATION 2.16 INCHES

GARDEN CORNERS (DELTA COUNTY)...AVERAGE TEMPERATURE 65.6 DEGREES
                                PRECIPITATION 2.82 INCHES

COOKS (SCHOOLCRAFT COUNTY)...PRECIPITATION 2.24 INCHES

MANISTIQUE...AVERAGE TEMPERATURE 64.0 (0.7 DEGREE BELOW NORMAL)
             PRECIPITATION 0.95 INCH (2.09 INCHES BELOW NORMAL)

                         JULY WEATHER SUMMARY

A CANADIAN HIGH PRESSURE SYSTEM BUILDING INTO THE UPPER GREAT LAKES
BROUGHT A PERIOD OF DRY...COOL WEATHER TO UPPER MICHIGAN ON 7/1 AND
7/2. MORNING LOWS ON 7/1 FELL INTO THE CHILLY 30S AT SOME OF THE
COOLER INTERIOR LOCATIONS. KENTON IN FAR SOUTHERN HOUGHTON COUNTY
REPORTED THE LOWEST TEMPERATURE OF 31 ON 7/1. ALTHOUGH THE MORNING
ON 7/2 WAS NOT AS COOL AS ON 7/1...THERE WERE STILL SOME LOW
TEMPERATURES IN THE 30S...MAINLY AT THE COOL SPOTS OVER THE INTERIOR
EAST HALF CLOSER TO THE SLOWLY DEPARTING HIGH. THE MERCURY AVERAGED
AROUND 10 DEGREES BELOW NORMAL ON 7/1 AND 5 DEGREES UNDER AVERAGE ON
7/2.

A WEAK COLD FRONT APPROACHING FROM NORTHWEST ONTARIO BROUGHT SOME
SHOWERS AND A FEW THUNDERSTORMS MAINLY OVER NORTHERN UPPER MICHIGAN
ON 7/3. MOST PLACES THAT SAW THE SHOWERS PICKED UP LESS THAN 0.10
INCH OF RAIN. BUT SOME OF THE HEAVIER SHOWERS DROPPED AS MUCH AS
0.58 INCH AT STONINGTON IN DELTA COUNTY AND NEAR MARQUETTE. EXCEPT
FOR SOME MORNING FOG NEAR LAKE SUPERIOR AND SMOKE FROM FIRES IN
SOUTHERN CANADA...THE WEATHER ON 7/4 WAS FAVORABLE AND PLEASANTLY
COOL FOR EVENING FIREWORKS DISPLAYS AS TRAILING HIGH PRESSURE FROM
CANADA DOMINATED ON THE HOLIDAY. MEAN DAILY TEMPERATURES ON 7/3 WERE
NEAR NORMAL AHEAD OF THE FRONT BUT THEN DROPPED TO ABOUT 5 DEGREES
BELOW AVERAGE ON 7/4 WITH THE ARRIVAL OF COOLER AIR. A GUSTY
SOUTHWEST WIND AND MOSTLY SUNNY SKIES ON THE WESTERN FLANK OF HIGH
PRESSURE PASSING TO THE EAST BROUGHT A RETURN OF SOME WARMER WEATHER
ON 7/5...WHEN THE THERMOMETER AVERAGED 5 DEGREES ABOVE NORMAL.

SHOWERS AND A FEW THUNDERSTORMS IN ADVANCE OF A COLD FRONT
APPROACHING FROM THE WEST ARRIVED OVER WESTERN UPPER MICHIGAN TOWARD
SUNRISE ON 7/6. AS THIS FRONT EDGED SLOWLY EAST ACROSS UPPER
MICHIGAN AND A WAVE OF LOW PRESSURE MOVED NORTH ALONG THIS
BOUNDARY...A WIDESPREAD MODERATE RAIN FELL OVER MOST OF THE U.P.
PRECIPITATION TOTALS BY THE TIME THE RAIN ENDED OVER THE EAST IN THE
EVENING ON 7/6 WERE GREATEST AND GENERALLY AN INCH OR MORE OVER THE
CENTRAL...WHERE A SPOT NEAR NEGAUNEE IN MARQUETTE COUNTY MEASURED AN
EVEN 2.00 INCHES. THE ONLY LOCATION THAT MISSED A GOOD DEAL OF THE
RAIN WAS OVER THE SOUTHEAST NEAR MANISTIQUE. SOME PLACES HERE
REPORTED LESS THAN 0.10 INCH...INCLUDING ONLY 0.03 INCH AT A SPOT ON
THE LAKE MICHIGAN SHORE JUST SOUTHWEST OF MANISTIQUE. A COOL
CANADIAN HIGH PRESSURE THEN DOMINATED ON 7/7...LOWERING THE MEAN
DAILY TEMPERATURE FROM ABOUT 5 DEGREES BELOW NORMAL ON 7/6 TO AROUND
10 DEGREES BELOW NORMAL ON 7/7 DESPITE A GOOD DEAL OF AFTERNOON
SUNSHINE.

AS THE COOL CANADIAN HIGH MOVED OVERHEAD EARLY ON 7/8...THE MERCURY
PLUNGED INTO THE 30S AT MANY OF THE INTERIOR COOL SPOTS. A LOCATION
JUST NORTH OF NEWBERRY REPORTED THE LOWEST READING OF 30...WHICH
ALSO ENDED UP AS THE LOWEST JULY TEMPERATURE ACROSS THE UPPER
PENINSULA. THIS HIGH PRESSURE SYSTEM MOVED ONLY SLOWLY TO THE
SOUTHEAST THROUGH 7/10...BRINGING MOSTLY CLEAR SKIES AND A SLOW
WARMING TREND. MEAN DAILY TEMPERATURES ROSE FROM 5 TO 10 DEGREES
BELOW NORMAL ON 7/8 TO UP TO 5 DEGREES ABOVE AVERAGE ON 7/10.
ALTHOUGH THE HIGH PRESSURE TO THE SOUTHEAST REMAINED AN INFLUENCE ON
7/11 AND 7/12...A SLOW WEAKENING OF THAT SYSTEM...A SOUTHWEST FLOW
OF MORE HUMID AIR AND SOME DAYTIME HEATING ALLOWED A FEW SHOWERS TO
DEVELOP NEAR LAKE SUPERIOR IN THE AFTERNOON ON 7/11. MORE ISOLATED
SHOWERS AND THUNDERSTORMS ALSO FORMED OVER THE WEST IN THE AFTERNOON
ON 7/12. ANY RAINFALL ON BOTH THESE DAYS WAS GENERALLY UNDER 0.10
INCH. MEAN DAILY TEMPERATURES ON 7/11 AND 7/12 WERE ABOUT 5 TO 10
DEGREES ABOVE NORMAL.

THE PERIOD FROM THE NIGHT ON 7/12-7/13 INTO 7/14 WAS UNSETTLED AS A
PAIR OF UPPER DISTURBANCE SLIDING THROUGH THE GREAT LAKES INTERACTED
WITH THE MORE HUMID AIRMASS IN PLACE TO GENERATE SOME SHOWERS AND
THUNDERSTORMS. THE FIRST ROUND OF SHOWERS AND SOME STORMS IMPACTED
MAINLY THE WEST AND WISCONSIN BORDER DURING THE NIGHT ON 7/12-7/13.
AS MUCH AS 0.25 TO 0.50 INCH OF RAIN FELL AT SOME PLACES IN THIS
AREA. A LOCATION 12 MILES SOUTHWEST OF ONTONAGON REPORTED THE MOST
RAIN WITH 0.78 INCH UNDER ONE OF THE HEAVIER SHOWERS. THE SECOND
ROUND OF SHOWERS WAS MOST NUMEROUS OVER THE SOUTHEAST HALF IN THE
AFTERNOON AND EVENING ON 7/13. MANY LOCATIONS PICKED UP AT LEAST
0.25 INCH OF RAIN. THE STRONGEST STORM IN THE LATE AFTERNOON CAUSED
WIND GUSTS AS HIGH AS 40 MPH AT MENOMINEE IN ADDITION TO SOME
LOCALLY HEAVY RAIN. MENOMINEE ALSO LED REPORTING STATIONS WITH 1.33
INCHES FROM THIS STORM. SOME LOCALLY DENSE FOG ALSO DEVELOPED DURING
THE OVERNIGHT ON 7/13-7/14 AFTER THE SHOWERS BEGAN TO TAPER
OFF...MAINLY OVER THE NORTH NEAR THE RELATIVELY COOL WATERS OF LAKE
SUPERIOR. ON 7/14...LINGERING LIGHT RAIN...DRIZZLE AND FOG NEAR LAKE
SUPERIOR GAVE WAY TO A MOSTLY SUNNY AFTERNOON AS A STEADY NORTH WIND
ON THE SOUTHERN FLANK OF HIGH PRESSURE BUILDING INTO ONTARIO
ADVECTED DRIER AIR INTO THE AREA. MEAN DAILY TEMPERATURES UP TO 5
DEGREES ABOVE AVERAGE ON 7/13 FELL TO ABOUT 10 DEGREES BELOW NORMAL
ON 7/14 WITH THE ARRIVAL OF THE COOLER AND DRIER CANADIAN AIRMASS.

THERE WERE MORE LOW TEMPERATURES IN THE 30S AT THE INTERIOR COOL
SPOTS DURING THE EARLY MORNING ON 7/15 AS THE CANADIAN HIGH DRIFTED
OVERHEAD. WITH MOSTLY CLEAR SKIES AND LIGHT WINDS...THE THERMOMETER
READ AS LOW AS 33 AT THE COOL SPOT JUST NORTH OF NEWBERRY. THIS SAME
LOCATION REPORTED A MINIMUM TEMPERATURE OF 39 EARLY ON 7/16 WITH
LIGHTER WINDS CLOSER TO THE SLOWLY DEPARTING HIGH...BUT A STEADY
SOUTH WIND FARTHER WEST LIMITED THE DIURNAL TEMPERATURE FALL OVER
THE REST OF UPPER MICHIGAN. THE AFTERNOON ON 7/16 TURNED WARMER
DESPITE INCREASING CLOUDS AHEAD OF AN APPROACHING DISTURBANCE. MEAN
DAILY TEMPERATURES AROUND 10 DEGREES BELOW NORMAL ON 7/15 REBOUNDED
TO NEAR AVERAGE ON 7/16.

NUMEROUS SHOWERS IN ADVANCE OF THE APPROACHING DISTURBANCE PASSING
WEST-TO-EAST THROUGH THE UPPER LAKES MOVED ACROSS UPPER MICHIGAN
DURING THE NIGHT ON 7/16-7/17. SINCE THESE SHOWERS TENDED TO WEAKEN
WITH TIME...THE HEAVIEST RAIN GENERALLY FELL OVER WEST. MANY
LOCATIONS THERE MEASURED AT LEAST 0.25 INCH OF RAIN. ATLANTIC MINE
IN HOUGHTON COUNTY REPORTED 1.02 INCHES...AND A SPOT NEAR ONTONAGON
HAD AN EVEN 1.00 INCHES. MOST LOCATIONS EAST OF A LINE FROM
MARQUETTE TO IRON MOUNTAIN SAW LESS THAN 0.25 INCH. A WEAK RIDGE OF
HIGH PRESSURE TRAILING THE DISTURBANCE BROUGHT A RETURN OF MORE
SUNSHINE ON 7/17. PATCHY DENSE FOG DEVELOPED NEAR LAKE MICHIGAN
DURING THE NIGHT ON 7/17-7/18 AS THE PASSING HIGH PRESSURE BROUGHT
MOSTLY CLEAR SKIES. THE MERCURY AVERAGED AROUND 5 DEGREES ABOVE
NORMAL ON 7/17.

SOME SHOWERS AND THUNDERSTORMS ON THE NORTHERN EDGE OF A DISTURBANCE
PASSING THROUGH THE UPPER MIDWEST IMPACTED MAINLY THE WISCONSIN
BORDER COUNTIES IN THE MORNING OF 7/18. A FEW PLACES REPORTED AROUND
0.10 INCH OF RAIN. THERE WAS A RETURN OF MORE SUNSHINE ALONG WITH
WARMER AND MORE HUMID WEATHER DURING THE AFTERNOON IN ADVANCE OF AN
APPROACHING COLD FRONT. RANDVILLE IN DICKINSON COUNTY AND LA BRANCHE
IN MENOMINEE COUNTY REPORTED A 90-DEGREE HIGH TEMPERATURE...LIFTING
MEAN DAILY TEMPERATURES ON 7/18 TO 5 TO 10 DEGREES ABOVE AVERAGE.
SOME ISOLATED SHOWERS AND THUNDERSTORMS ACCOMPANIED THE PASSAGE OF
THE COLD FRONT DURING THE NIGHT ON 7/18-7/19...BUT PRECIPITATION WAS
GENERALLY UNDER 0.10 INCH. WEST TO NORTHWEST WINDS GUSTING AS HIGH
AS 35 TO 40 MPH OVER THE KEWEENAW ON 7/19 BEHIND THE FRONTAL PASSAGE
DREW MUCH DRIER AND SOMEWHAT COOLER AIR INTO THE AREA...BUT MEAN
DAILY TEMPERATURES ON 7/19 STILL HOVERED AROUND 5 DEGREES ABOVE
NORMAL UNDER A GOOD DEAL OF SUNSHINE.

A REINFORCING COLD FRONT UNDER A BRIEFLY DEEPENING UPPER TROUGH
CENTERED NEAR HUDSON BAY SWUNG ACROSS UPPER MICHIGAN ON 7/20. SINCE
THE AIRMASS IN PLACE WAS SO DRY...THERE WERE NO SHOWERS. A CANADIAN
HIGH PRESSURE SYSTEM BROUGHT PLEASANTLY COOLER WEATHER TO THE UPPER
LAKES THROUGH 7/22. EXCEPT FOR SOME DAYTIME CUMULUS CLOUDS...SKIES
WERE MOSTLY CLEAR. NEAR NORMAL DAILY TEMPERATURES ON 7/20 DROPPED TO
AROUND 5 DEGREES BELOW AVERAGE ON 7/21 AND 7/22 WITHIN THE INCOMING
CANADIAN AIRMASS. MORE CLOUDS AND SOME ISOLATED SHOWERS AND
THUNDERSTORMS RETURNED TO MAINLY THE WEST HALF DURING THE NIGHT ON
7/22-7/23 AND 7/23 AS A WEAK UPPER DISTURBANCE DROPPED THROUGH THE
WESTERN GREAT LAKES. ANY RAINFALL WAS UNDER 0.10 INCH. THE MEAN
DAILY TEMPERATURE ON 7/23 REBOUNDED TO NEAR NORMAL AS THE SOUTHWEST
FLOW ON THE WESTERN FLANK OF THE SLOWLY DEPARTING HIGH PRESSURE
SYSTEM DREW SOME WARMER AIR INTO THE UPPER GREAT LAKES.

ON 7/24...THE INCREASING SOUTHWEST FLOW BETWEEN THE HIGH MOVING AWAY
TO THE EAST AND A COLD FRONT DRIFTING THROUGH MINNESOTA PUMPED
WARMER AND MORE HUMID AIR INTO UPPER MICHIGAN...LIFTING THE MEAN
DAILY TEMPERATURE TO AROUND 5 DEGREES ABOVE NORMAL. A BAND OF
SCATTERED SHOWERS AND THUNDERSTORMS MOVED INTO THE WEST DURING THE
AFTERNOON AND THEN CROSSED THE UPPER PENINSULA DURING THE NIGHT ON
7/24-7/25 WITH THE COLD FRONT. ONE OF THE THUNDERSTORMS TURNED
SEVERE IN THE EARLY MORNING ON 7/25 AND CAUSED SOME WIND DAMAGE NEAR
ROCK IN DELTA COUNTY. THERE WAS ALSO SOME LOCALLY HEAVY RAIN AS WELL
WITH AN INCH OR MORE FALLING AT A COUPLE LOCATIONS. GARDEN CORNERS
IN DELTA COUNTY REPORTED AS MUCH AS 1.73 INCHES OF RAIN...BUT MANY
PLACES MISSED THE SHOWERS ALTOGETHER...EXACERBATING RECENT DRYNESS.

BEHIND THE FRONT ON 7/25...THE DAY WAS MOSTLY SUNNY AND STILL WARM
BUT LESS HUMID. ALTHOUGH THE NIGHT ON 7/25-7/26 WAS SEASONABLY COOL
AS THE HIGH PRESSURE RIDGE PASSED OVERHEAD...THE DAY ON 7/26 WAS
MOSTLY SUNNY AND VERY WARM WITH MORE 90-DEGREE MAXIMUM TEMPERATURES
AWAY FROM LAKE MODERATION. CHATHAM IN ALGER COUNTY...STONINGTON IN
DELTA COUNTY AND RANDVILLE ALL SAW THE THERMOMETER REACH 92. AFTER
ANOTHER COMFORTABLE NIGHT ON 7/26-7/27...THE COMBINATION OF LOTS OF
SUNSHINE AND A STRONGER SOUTHWEST WIND BROUGHT MORE WIDESPREAD 90-
DEGREE MAXIMUMS AND SOME DAILY RECORD HIGH TEMPERATURES THE
FOLLOWING AFTERNOON. AT MANY PLACES...7/27 WAS THE FIRST DAY SINCE
AUGUST 2013 THE MERCURY REACHED 90. PELKIE IN BARAGA COUNTY AND
STONINGTON REPORTED THE JULY MAXIMUM OF 95 THAT HOT AFTERNOON. WITH
THE HEATING OF THE DAY...SPOTTY AFTERNOON SHOWERS AND THUNDERSTORMS
DEVELOPED OVER THE EAST HALF INLAND FROM THE COOLING INFLUENCE OF
THE GREAT LAKES. TEMPERATURES FELL ONLY A BIT UNDER 70 OVER THE WEST
NEAR LAKE SUPERIOR EARLY ON 7/28 WITH A STEADY SOUTH WIND. DESPITE
SOME CLOUDS...THE AFTERNOON ON 7/28 WAS ANOTHER WARM AND HUMID ONE
WITH THE THERMOMETER REACHING 90 AT PAULDING IN ONTONAGON COUNTY AND
IRON MOUNTAIN. MEAN DAILY TEMPERATURES ON 7/25 THROUGH 7/28 RAN
ABOUT 5 TO AS MUCH AS 10 DEGREES ABOVE NORMAL ON 7/27.

A COLD FRONT PASSED THROUGH THE UPPER GREAT LAKES DURING THE NIGHT
ON 7/28-7/29...ACCOMPANIED BY SOME ISOLATED SHOWERS AND
THUNDERSTORMS OVER THE WEST HALF. NO LOCATION REPORTED MORE THAN
0.10 INCH OF RAIN...SO THERE WAS LITTLE RELIEF FROM RECENT DRYNESS.
THE DAY ON 7/29 WAS PARTLY TO MOSTLY SUNNY...BREEZY AND LESS HUMID
BUT STILL ON THE WARM SIDE. THE THERMOMETER AVERAGED 5 TO 10 DEGREES
ABOVE NORMAL. WEST WINDS GUSTING AS HIGH AS 40 TO 45 MPH OVER THE
KEWEENAW TOOK THE EDGE OFF THE WARMTH...AND THESE GUSTY WINDS
PERSISTED THROUGH THE NIGHT ON 7/29-7/30 UNDER THE SHARP DIFFERENCE
IN PRESSURE BETWEEN A HIGH SITUATED IN THE PLAINS AND DEEP LOW
PRESSURE MOVING OVER HUDSON BAY. SCATTERED SHOWERS AND THUNDERSTORMS
ERUPTED NEAR THE WISCONSIN BORDER DURING THE AFTERNOON ON 7/30 TO
THE NORTH OF A DISTURBANCE PASSING THROUGH THE UPPER MIDWEST AND
OVER THE KEWEENAW IN THE EVENING ON THE SOUTHERN FLANK OF ANOTHER
CROSSING ONTARIO. ONE OF THE STRONGER STORMS CAUSED WIND GUSTS UP TO
48 MPH NEAR BESSEMER IN GOGEBIC COUNTY LATE IN THE AFTERNOON. NO
MORE THAN 0.21 INCH OF RAIN WAS REPORTED NEAR MARENISCO IN GOGEBIC
COUNTY. THERE WERE MORE ISOLATED SHOWERS AND THUNDERSTORMS IN THE
AFTERNOON ON 7/31...THIS TIME MAINLY OVER THE SOUTHEAST HALF OF
UPPER MICHIGAN IN ADVANCE OF YET ANOTHER FAST MOVING DISTURBANCE
EMBEDDED IN THE NORTHWEST FLOW ALOFT AROUND THE DEEP LOW PRESSURE
OVER HUDSON BAY. OBSERVED RAINFALL WAS UNDER 0.10 INCH. MEAN DAILY
TEMPERATURES FROM 5 TO 10 DEGREES ABOVE NORMAL ON 7/30 DROPPED TO
AROUND AVERAGE ON 7/31 AS PROGRESSIVELY COOLER AIR FOLLOWED EACH OF
THE PASSING DISTURBANCES INTO THE UPPER LAKES.

                         SEPTEMBER FORECAST

THE CLIMATE PREDICTION CENTER (CPC) IS FORECASTING EQUAL CHANCES OF
AN ABOVE AND BELOW NORMAL MONTHLY MEAN TEMPERATURE AND ABOVE AND
BELOW NORMAL MONTHLY PRECIPITATION OVER ALL OF UPPER MICHIGAN IN
SEPTEMBER 2015.

                        SEPTEMBER CLIMATOLOGY

AVERAGE TEMPERATURES IN SEPTEMBER BEGIN TO FALL SHARPLY...ABOUT 8 TO
9 DEGREES LOWER THAN IN AUGUST...AS SUMMER TRANSITIONS TO AUTUMN AND
DAYLIGHT GROWS SHORTER. THE AUTUMNAL EQUINOX THIS YEAR IS AT 420 AM
EDT ON 9/23. POSSIBLE SUNSHINE IN SEPTEMBER DECLINES FROM 800
MINUTES ON 9/1 TO 706 MINUTES ON 9/30...A DECREASE OF 3 TO 4 MINUTES
EACH DAY.

ALTHOUGH THE DAYS GROW SHORTER DURING THE NINTH MONTH...MID SUMMER
LIKE WARMTH CAN STILL GRIP UPPER MICHIGAN DURING SEPTEMBER. ON
9/12/98...RESIDENTS OF IRON MOUNTAIN SIZZLED IN 98-DEGREE HEAT. BOTH
IRON MOUNTAIN AND IRONWOOD RECORDED HIGH TEMPERATURES ABOVE 90 FIVE
DAYS IN A ROW DURING A TORRID MID SEPTEMBER HEATWAVE BETWEEN 9/8 AND
9/12 IN 1931. WITH TEMPERATURES AVERAGING 7 TO 8 DEGREES ABOVE
NORMAL...SEPTEMBER 1931 GOES DOWN IN THE RECORD BOOKS AS THE WARMEST
SEPTEMBER EVER OBSERVED AT IRON MOUNTAIN AND IRONWOOD. MORE RECENTLY
IN 2002...MANY PLACES BAKED IN 90-DEGREE HEAT FOR THREE DAYS IN A
ROW ON 9/7 THROUGH 9/9.

MONTHLY TEMPERATURES RAN 3 TO 8 DEGREES ABOVE NORMAL IN SEPTEMBER
2004...WHICH IS THE WARMEST SEPTEMBER SINCE RECORDS BEGAN AT
ONTONAGON AND THE MARQUETTE NWS. THE MONTHLY AVERAGE TEMPERATURE OF
61.8 AT THE MARQUETTE NWS WAS ONLY A TENTH OF A DEGREE LOWER THAN
THE 61.9 READING OBSERVED IN JULY 2004. SEPTEMBER 2004 ALSO RANKS IN
THE LIST OF TOP TEN WARMEST AT IRON MOUNTAIN...MARQUETTE
CITY...NEWBERRY...MUNISING...AND IRONWOOD. SEPTEMBER 2009 WAS ALSO
QUITE BALMY WITH MONTHLY AVERAGE TEMPERATURES 4 TO 6 DEGREES ABOVE
THE 1971-2000 MEAN. THAT MONTH WAS AMONG THE TOP 10 WARMEST
SEPTEMBERS AT MOST LOCATIONS IN UPPER MICHIGAN.

BUT WINTER OFTEN MAKES ITS FIRST RETURN BY LATE IN THE MONTH. THE
GROWING SEASON ENDS EVERYWHERE EXCEPT ALONG THE WARMER GREAT LAKES
SHORES DURING SEPTEMBER WITH AN INCREASED PROBABILITY OF KILLING
FROST. RECORD LOW TEMPERATURES OVER INLAND AREAS FALL INTO THE 20S
DURING THE MONTH AND EVEN INTO THE UPPER TEENS AT MANY LOCATIONS
TOWARD MONTHS END. ON 9/22/95...THE WESTERN UPPER PENINSULA WAS
STRUCK WITH AN EARLY SEASON SNOWSTORM. IRONWOOD PICKED UP 6.5
INCHES...AND HOUGHTON ALSO SAW 3 INCHES OF THE WHITE STUFF THAT DAY.
AT LEAST AN INCH OF SNOW HAS FALLEN ON PORTIONS OF UPPER MICHIGAN
DURING LATE SEPTEMBER IN 1965...1974...1989...AND 1993.

AS THE JET STREAM SINKS FARTHER SOUTH DURING SEPTEMBER AND INTERACTS
WITH FAIRLY WARM AND HUMID AIRMASSES STILL RESIDENT OVER THE UNITED
STATES...AVERAGE MONTHLY PRECIPITATION OVER MUCH OF UPPER MICHIGAN
PEAKS AT A YEARLY MAXIMUM BETWEEN 3.5 AND 4.0 INCHES. ALTHOUGH
CONVECTION OCCURS LESS FREQUENTLY THAN DURING MID SUMMER...
THUNDERSTORMS STILL PRESENT A SEVERE WEATHER AND HEAVY RAIN THREAT.
IRONWOOD WAS INUNDATED WITH 10.74" OF RAIN DURING SEPTEMBER 1926.

                OUTLOOK FOR FALL AND EARLY 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 OCTOBER THROUGH DECEMBER 2015. 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


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.