Climatological Report (Monthly)
Issued by NWS Marquette, MI

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000
CXUS53 KMQT 132215 AAB
CLMMQT

CLIMATE REPORT...PRELIMINARY
NATIONAL WEATHER SERVICE MARQUETTE MI
615 PM EDT FRI SEP 13 2013

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

...THE MARQUETTE MI CLIMATE SUMMARY FOR THE MONTH OF AUGUST 2013...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1961 TO 2013

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            92   08/25        73      19       90  08/30
LOWEST             42   08/13        52     -10       43  08/19
AVG. MAXIMUM     75.5              74.3     1.2     75.3
AVG. MINIMUM     53.1              53.1     0.0     53.7
MEAN             64.3              63.7     0.6     64.5
DAYS MAX >= 90      1               0.5     0.5        1
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           2.32              3.05   -0.73     2.42
DAILY AVG.       0.07              0.10   -0.03     0.08
DAYS >= .01        14              10.7     3.3       12
DAYS >= .10         7               6.1     0.9        6
DAYS >= .50         2               1.9     0.1        2
DAYS >= 1.00        0               0.7    -0.7        0
GREATEST
 24 HR. TOTAL    0.89   08/26 TO 08/27

SNOWFALL (INCHES)
RECORDS
 TOTAL            0.0   MM
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     102               106      -4       76
 SINCE 7/1        214               185      29       90
COOLING TOTAL      90                66      24       67
 SINCE 1/1        270               220      50      333
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              MM
HIGHEST WIND SPEED/DIRECTION    MM        DATE   MM
HIGHEST GUST SPEED/DIRECTION    41/315    DATE  08/26

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                3     RAIN                       4
LIGHT RAIN               16     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      1
HAZE                      0

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

&&

...AUGUST 2013 MONTHLY CLIMATE SUMMARY FOR UPPER MICHIGAN...
(THIS DISCUSSION DOES NOT INCLUDE CHIPPEWA AND MACKINAC COUNTIES)

...DRY NORTHWEST BUT WETTER EAST AND NEAR THE WISCONSIN BORDER...
...SECOND WETTEST AUGUST AT IRONWOOD...

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

AUGUST CLIMATE STATISTICS FOR THE MARQUETTE NWS IN NEGAUNEE TOWNSHIP

                                    NORMAL   DEPARTURE
AVERAGE TEMPERATURE         64.3     63.7   PLUS    0.6
AVERAGE HIGH TEMPERATURE    75.5     74.3   PLUS    1.2
AVERAGE LOW TEMPERATURE     53.1     53.1             0
HEATING DEGREE DAYS          102      106  MINUS      4
COOLING DEGREE DAYS           90       66   PLUS     24
TOTAL PRECIPITATION         2.32     3.05  MINUS   0.73
TOTAL SNOWFALL                 0        0             0

HIGHEST TEMPERATURE:                    92 ON 8/25
LOWEST TEMPERATURE:                     42 ON 8/13
GREATEST CALENDAR DAY PRECIPITATION:  0.81 ON 8/26
GREATEST 24 HOUR PRECIPITATION:       0.89 ON 8/26-8/27
GREATEST CALENDAR DAY SNOWFALL:          0
GREATEST 24 HOUR SNOWFALL:               0
PEAK WIND SPEED: 41 MPH FROM THE NORTHWEST ON 8/26

DAILY RECORD HIGH MAXIMUM TEMPERATURE ON 8/25...92 (OLD RECORD
                                                    88...1993/2012)
DAILY RECORD PRECIPITATION ON 8/26...0.81 (0.75...1967)
---------------------------------------------------------------------
GREAT LAKES WATER LEVELS (FEET/METERS ABOVE MEAN SEA LEVEL)

                            LAKE SUPERIOR  LAKE MICHIGAN-HURON
8/01/13 DAILY MEAN          601.86/183.44     577.73/176.09
8/31/13 DAILY MEAN          601.94/183.47     577.70/176.08
AVG JUL 2013 DAILY MEAN     601.60/183.37     577.72/176.09
AVG AUG 2012 DAILY MEAN     601.28/183.27     577.34/175.97
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 STEADY IN AUGUST...

AFTER SIGNIFICANT RISES IN WATER LEVEL THE PAST COUPLE OF MONTHS...
THE WATER LEVEL ON LAKES SUPERIOR AND MICHIGAN/HURON HELD NEARLY
STEADY IN AUGUST AS GREATER EVAPORATION ASSOCIATED WITH HIGHER WATER
TEMPERATURES NEARLY BALANCED INCOMING RUNOFF FROM THE LAND DRAINAGE
BASINS. THE AUGUST 2013 WATER LEVELS ON THE WESTERN LAKES ARE ABOUT
3-4 INCHES HIGHER THAN OBSERVED IN AUGUST 2012...BUT STILL ABOUT 12
INCHES BELOW NORMAL ON LAKES MICHIGAN/HURON AND 10 INCHES BELOW
AVERAGE FOR LAKE SUPERIOR.

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 BARAGA AND ONTONAGON ON 8/25

LOWEST REPORTED TEMPERATURE...31 AT A LOCATION 10 MILES SOUTH OF
                               MUNISING ON 8/15

HIGHEST AVERAGE TEMPERATURE...67.7 DEGREES AT MARQUETTE CITY

LOWEST AVERAGE TEMPERATURE...60.9 DEGREES AT STAMBAUGH IN IRON COUNTY

HIGHEST MONTHLY PRECIPITATION...8.40 INCHES AT IRONWOOD

LOWEST MONTHLY PRECIPITATION...1.06 INCHES AT COPPER HARBOR

THERE WAS A SHARP CONTRAST IN WEATHER REGIMES OBSERVED ACROSS UPPER
MICHIGAN IN AUGUST 2013. DURING THE FIRST HALF OF THE MONTH...A
NORTHWEST FLOW ALOFT ON THE WESTERN FLANK OF A DEEP UPPER TROUGH
OVER EASTERN CANADA AND THE NORTHEAST U.S. FUNNELED COOL CANADIAN
AIRMASSES INTO THE UPPER GREAT LAKES. MEAN DAILY TEMPERATURES RAN
BELOW NORMAL ALMOST EVERY DAY FROM 8/1 THROUGH 8/16...WITH DAYTIME
HIGHS IN THE 60S AND OVERNIGHT LOWS IN THE 40S COMMON. THE OVERALL
TEMPERATURE DEPARTURE FROM 8/1 THROUGH 8/15 RAN 5 TO 8 DEGREES BELOW
AVERAGE. THE TROUGH WEAKENED AFTER 8/15...AND AN UPPER RIDGE
EXPANDED NORTH THROUGH THE NORTHERN PLAINS AND THE UPPER MIDWEST
TOWARD THE UPPER GREAT LAKES. WITH THE ARRIVAL OF WARMER AIR...MEAN
DAILY TEMPERATURES ON 8/17 THROUGH 8/31 ENDED UP ABOVE NORMAL ON ALL
BUT A FEW DAYS. DURING THIS TWO-WEEK STRETCH...AFTERNOON
TEMPERATURES IN THE 80S AND OVERNIGHT LOWS IN THE 60S WERE THE
RULE...LIFTING THE OVERALL TEMPERATURE DEPARTURE THE SECOND HALF OF
AUGUST TO 6 TO 9 DEGREES ABOVE NORMAL. THE RESULT OF THE AVERAGE OF
THESE TWO HALF EXTREMES WAS A MEAN MONTHLY TEMPERATURE WITHIN A
DEGREE OF NORMAL.

ALTHOUGH LOWER TEMPERATURES TOWARD 32 ARE MORE LIKELY DURING LATE
AUGUST WHEN NIGHTS BECOME LONGER...IN 2013 THE CHANGE IN WEATHER
PATTERN RESULTED IN A MORE FREQUENT OCCURRENCE OF COOLER WEATHER THE
FIRST HALF OF THE MONTH. AT LEAST ONE LOCATION IN UPPER MICHIGAN
REPORTED A LOW TEMPERATURE IN THE 30S EARLY IN THE MORNING ON 8/4...
8/8...8/10...8/11...8/13-8/16 AND 8/23. ON THE OTHER HAND...THERE
WERE MAXIMUM TEMPERATURES IN THE 90S ON 8/20...8/21 AND 8/25 AFTER
WARMER WEATHER RETURNED. THE HOTTEST AFTERNOON WAS ON 8/25...WHEN
THE THERMOMETER TOPPED OUT AS HIGH AS 95 AT BARAGA AND ONTONAGON.

AS IS OFTEN THE CASE DURING THE SUMMER...PRECIPITATION OVER UPPER
MICHIGAN IN AUGUST VARIED CONSIDERABLY...EVEN ACROSS SHORT
DISTANCES. IN GENERAL...LOCATIONS NEAR THE WISCONSIN BORDER AND EAST
OF A LINE FROM MARQUETTE TO ESCANABA RECORDED ABOVE NORMAL RAINFALL.
OVER THE NORTHWEST...PRECIPITATION TENDED TO RUN BELOW AVERAGE.
IRONWOOD SAW YET ANOTHER MONTH OF WELL ABOVE NORMAL PRECIPITATION
WITH 8.40 INCHES OF RAIN...THANKS MAINLY TO TWO TORRENTIAL RAINFALLS
THE LAST WEEK OF AUGUST. THIS TOTAL...ALMOST 250 PERCENT OF NORMAL
FOR IRONWOOD...LED ALL REPORTING SITES ACROSS UPPER MICHIGAN AND
MARKS AUGUST 2013 AS THE SECOND WETTEST EIGHTH MONTH FOR THAT PLACE.
BUT NOT TOO FAR TO THE NORTHEAST...A LOCATION JUST INLAND FROM
ONTONAGON MISSED MOST OF THE HEAVY RAIN IN LATE AUGUST AND MEASURED
ONLY 1.99 INCHES DURING THE MONTH...JUST SHY OF 70 PERCENT OF
NORMAL. COPPER HARBOR WAS THE DRIEST LOCATION WITH ONLY 1.06 INCHES
OF RAIN THE WHOLE MONTH.

A DISTURBANCE DRIFTING EAST THROUGH ONTARIO BROUGHT PERIODS OF
SHOWERS AND THUNDERSTORMS TO THE UPPER GREAT LAKES ON 8/5 INTO THE
MORNING ON 8/7. THE HEAVIEST PRECIPITATION OCCURRED OVER THE SOUTH
CENTRAL DURING THE NIGHT ON 8/6-8/7...WHEN MENOMINEE PICKED UP 1.19
INCHES OF RAIN. THE THUNDERSTORM RESPONSIBLE FOR THIS HEAVY RAIN
ALSO TURNED SEVERE AND CAUSED SOME WIND DAMAGE AT OTHER LOCATIONS IN
FAR SOUTHERN MENOMINEE COUNTY.

ANOTHER CLUSTER OF STRONG TO SEVERE THUNDERSTORMS IMPACTED ALL BUT
NORTHWEST UPPER MICHIGAN ON 8/21 AS AN APPROACHING COLD FRONT LIFTED
THE VERY WARM AND HUMID AIRMASS IN PLACE OVER THE UPPER LAKES. THERE
WAS AT LEAST ONE REPORT OF LARGE HAIL OR DAMAGING WINDS IN IRON...
ONTONAGON...MARQUETTE AND ALGER COUNTIES. GARDEN CORNERS LED
REPORTING STATIONS WITH 1.33 INCHES OF RAIN DURING THIS EVENT.

AS A PAIR OF DISTURBANCES TOPPED THE SPRAWLING UPPER RIDGE OVER THE
PLAINS RESPONSIBLE FOR BLISTERING HEAT FROM THE NORTHERN PLAINS INTO
THE UPPER LAKES AND MIDWEST...CLUSTERS OF SHOWERS AND STRONG TO
SEVERE THUNDERSTORMS IN ADVANCE OF THESE DISTURBANCES TRACKED ACROSS
UPPER MICHIGAN DURING THE NIGHTS ON 8/25-8/26 AND 8/26-8/27. THE
FIRST OUTBREAK ON 8/25-8/26 IMPACTED ALL OF UPPER MICHIGAN WITH
WIDESPREAD RAIN AND INUNDATED IRONWOOD WITH 2.42 INCHES OF
PRECIPITATION. THE MOST SIGNIFICANT WEATHER OCCURRED OVER MARQUETTE
COUNTY IN THE EARLY MORNING HOURS ON 8/26...WHEN DAMAGING WINDS IN
EXCESS OF 60 MPH DOWNED NUMEROUS TREES. ANOTHER SEVERE STORM CAUSED
WIND DAMAGE IN NORTHERN LUCE COUNTY IN THE EARLY MORNING OF 8/26.
AREAS WITHIN 50 MILES OR SO OF THE WISCONSIN BORDER SAW THE HEAVIEST
RAIN AND STRONGEST THUNDERSTORMS IN ADVANCE OF THE SECOND
DISTURBANCE DURING THE NIGHT ON 8/26-8/27. WIND GUSTS REACHED 50 MPH
AT IRON MOUNTAIN AHEAD OF ONE OF THE STRONGER STORMS...AND IRONWOOD
LED REPORTING STATIONS AGAIN WITH 2.10 INCHES OF RAIN. SOME LOCALLY
HEAVY RAIN LINGERED THROUGH THE MORNING ON 8/27 OVER THE SOUTH
CENTRAL.
---------------------------------------------------------------------
                       ...SUMMER STATISTICS...

                ...WET AND A BIT COOLER THAN NORMAL...

                      JUNE-AUGUST PRECIPITATION

              OBSERVED  NORMAL  DEPARTURE     RECORD       2013 RANK

IRONWOOD       20.74    11.13     +9.61    20.96 /1909/   2ND HIGHEST

NEWBERRY       14.79     9.31     +5.48    16.07 /1952/   2ND HIGHEST

MANISTIQUE     12.85     8.86     +3.99    15.21 /2010/   8TH HIGHEST

MARQUETTE NWS  10.41     8.73     +1.68    17.89 /1968/  12TH HIGHEST

HOUGHTON       11.26     7.48     +3.78    16.49 /1951/  22ND HIGHEST

MARQUETTE CITY 11.41     8.13     +3.28    17.29 /1949/  23RD HIGHEST

MUNISING       10.52     9.11     +1.41    17.35 /2010/      ****

IRON MOUNTAIN  11.10    10.19     +0.91    21.80 /1951/      ****

                   JUNE-AUGUST AVERAGE TEMPERATURE

              OBSERVED  NORMAL  DEPARTURE     RECORD       2013 RANK

MANISTIQUE      61.7     63.0     -1.3     57.8 /1992/    19TH COOLEST

IRONWOOD        63.1     63.8     -0.7     58.2 /1992/    25TH COOLEST

MUNISING        62.0     62.8     -0.8     56.0 /1920/        ****

MARQUETTE CITY  63.8     64.4     -0.6     58.6 /1915/        ****

MARQUETTE NWS   63.0     63.3     -0.3     57.9 /1992/        ****

HOUGHTON        62.6     62.7     -0.1     57.7 /1950/        ****

IRON MOUNTAIN   66.1     66.0     +0.1     61.8 /1927/        ****

NEWBERRY        64.1     63.6     +0.5     57.9 /1992/        ****

**** NOT IN TOP 25
---------------------------------------------------------------------
              ...VERY WET THE PAST COUPLE OF MONTHS...

THE HEAVY RAIN AT IRONWOOD IN AUGUST LIFTS THE 6-MONTH PRECIPITATION
THERE SINCE 3/1 TO OVER 3 FEET...SETTING A NEW 3/1 THROUGH 8/31
RECORD. IN FACT...THIS PRECIPITATION TOTAL OF 36.41 INCHES IS THE
SECOND HIGHEST AMOUNT EVER TO FALL IN ANY 6-MONTH PERIOD AT
IRONWOOD...TRAILING ONLY A WET PERIOD FROM MAY THROUGH OCTOBER IN
1909...WHEN 37.15 INCHES ACCUMULATED THERE.

                   MARCH-AUGUST 2013 PRECIPITATION

                                               RECORD
              OBSERVED  NORMAL  DEPARTURE  /OR PREVIOUS/   2013 RANK

IRONWOOD       36.41    18.88    +17.53    31.34 /1942/    NEW RECORD

NEWBERRY       23.03    16.41     +6.62    28.67 /2002/   5TH HIGHEST

HOUGHTON       22.41    13.38     +9.03    25.75 /1955/   8TH HIGHEST

MARQUETTE NWS  22.20    17.82     +4.38    28.58 /1973/   8TH HIGHEST

MUNISING       20.05    16.38     +3.67    23.74 /1960/  11TH HIGHEST

MANISTIQUE     20.18    15.47     +4.71    26.22 /2002/  12TH HIGHEST

MARQUETTE CITY 19.19    15.11     +4.08    27.03 /1960/  20TH HIGHEST

IRON MOUNTAIN  20.30    17.24     +3.06    25.72 /1942/  24TH HIGHEST

---------------------------------------------------------------------
SOME OTHER TEMPERATURE AND PRECIPITATION OBSERVATIONS ACROSS UPPER
MICHIGAN IN AUGUST 2013 INCLUDE:

IRONWOOD...AVERAGE TEMPERATURE 64.1 (NORMAL)
           PRECIPITATION 8.40 INCHES (5.03 INCHES ABOVE NORMAL)

WATERSMEET (GOGEBIC COUNTY)...PRECIPITATION 5.14 INCHES

ONTONAGON...AVERAGE TEMPERATURE 66.4 (0.3 DEGREE ABOVE NORMAL)
 (6 MILES   PRECIPITATION 1.99 INCHES (0.87 INCH BELOW NORMAL)
  INLAND)

GREENLAND (ONTONAGON COUNTY)...AVERAGE TEMPERATURE 63.1 DEGREES
                               PRECIPITATION 2.22 INCHES

BERGLAND DAM (ONTONAGON COUNTY)...AVERAGE TEMPERATURE 63.2 DEGREES
                                  PRECIPITATION 3.78 INCHES

TWIN LAKES (HOUGHTON COUNTY)...AVERAGE TEMPERATURE 63.6 DEGREES

HOUGHTON COUNTY...AVERAGE TEMPERATURE 64.7 (0.8 DEGREE ABOVE NORMAL)
 AIRPORT          PRECIPITATION 1.72 INCHES (0.69 INCH BELOW NORMAL)

ATLANTIC MINE (HOUGHTON COUNTY)...PRECIPITATION 1.54 INCHES

MOHAWK (KEWEENAW COUNTY)...PRECIPITATION 2.07 INCHES

COPPER HARBOR...AVERAGE TEMPERATURE 64.2 DEGREES
                PRECIPITATION 1.06 INCHES

JACOBSVILLE (HOUGHTON COUNTY)...AVERAGE TEMPERATURE 63.2 DEGREES
                                PRECIPITATION 1.97 INCHES

BARAGA...AVERAGE TEMPERATURE 66.7 DEGREES
         PRECIPITATION 1.95 INCHES

WATTON (BARAGA COUNTY)...AVERAGE TEMPERATURE 62.2 DEGREES
                         PRECIPITATION 1.53 INCHES

HERMAN (BARAGA COUNTY)...PRECIPITATION 2.51 INCHES

CLARKSBURG (MARQUETTE COUNTY)...AVERAGE TEMPERATURE 61.9 DEGREES
                                PRECIPITATION 2.03 INCHES

BIG BAY (MARQUETTE COUNTY)...AVERAGE TEMPERATURE 66.5 DEGREES
                             PRECIPITATION 3.29 INCHES

MARQUETTE CITY...AVERAGE TEMPERATURE 67.7 (1.1 DEGREE ABOVE NORMAL)
                 PRECIPITATION 3.11 INCHES (0.48 INCH ABOVE NORMAL)

HARVEY (MARQUETTE COUNTY)...AVERAGE TEMPERATURE 66.0 DEGREES
                            PRECIPITATION 2.29 INCHES

GWINN (MARQUETTE COUNTY)...PRECIPITATION 1.69 INCHES

CHATHAM (ALGER COUNTY)...AVERAGE TEMPERATURE 65.1 DEGREES
                         PRECIPITATION 2.68 INCHES

MUNISING...AVERAGE TEMPERATURE 64.4 (0.1 DEGREE BELOW NORMAL)
           PRECIPITATION 2.60 INCHES (0.12 INCH ABOVE NORMAL)

WETMORE (ALGER COUNTY)...PRECIPITATION 2.26 INCHES
(15 MILES SOUTH)

NEWBERRY...AVERAGE TEMPERATURE 65.0 (0.4 DEGREE ABOVE NORMAL)
           PRECIPITATION 3.81 INCHES (0.58 INCH ABOVE NORMAL)

STAMBAUGH (IRON COUNTY)...AVERAGE TEMPERATURE 60.9 DEGREES
                          PRECIPITATION 4.27 INCHES

AMASA (IRON COUNTY)...PRECIPITATION 3.57 INCHES

IRON MOUNTAIN...AVERAGE TEMPERATURE 66.8 (0.4 DEGREE ABOVE NORMAL)
                PRECIPITATION 3.99 INCHES (0.73 INCH ABOVE NORMAL)

NORWAY (DICKINSON COUNTY)...AVERAGE TEMPERATURE 66.5 DEGREES
                            PRECIPITATION 3.37 INCHES

DAGGETT (MENOMINEE COUNTY)...PRECIPITATION 4.13 INCHES

MENOMINEE...PRECIPITATION 4.08 INCHES

ESCANABA...AVERAGE TEMPERATURE 64.3 DEGREES
           PRECIPITATION 2.65 INCHES

GLADSTONE (DELTA COUNTY)...PRECIPITATION 2.38 INCHES

GARDEN CORNERS (DELTA COUNTY)...AVERAGE TEMPERATURE 63.9 DEGREES
                                PRECIPITATION 3.68 INCHES

COOKS (SCHOOLCRAFT COUNTY)...PRECIPITATION 2.98 INCHES

MANISTIQUE...AVERAGE TEMPERATURE 63.9 (0.7 DEGREE BELOW NORMAL)
             PRECIPITATION 3.50 INCHES (0.25 INCH ABOVE NORMAL)

                       AUGUST WEATHER SUMMARY

MORE TO COME LATER.

                         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 2013.

                        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 444 PM
EDT ON 9/22. 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 INTO EARLY WINTER

THE CLIMATE PREDICTION CENTER (CPC) IS FORECASTING A GREATER THAN
CLIMATOLOGICAL CHANCE OF AN ABOVE NORMAL 3-MONTH MEAN TEMPERATURE
OVER ALL OF UPPER MICHIGAN IN OCTOBER THROUGH DECEMBER 2013. THE CPC
ALSO EXPECTS A GREATER CHANCE OF ABOVE NORMAL 3-MONTH PRECIPITATION
OVER UPPER MICHIGAN DURING OCTOBER THROUGH DECEMBER EXCEPT OVER THE
FAR EAST...WHERE THE FORECAST SHOWS AN EQUAL CHANCE OF ABOVE AND
BELOW NORMAL 3-MONTH PRECIPITATION.

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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