Climatological Report (Monthly)
Issued by NWS Marquette, MI

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000
CXUS53 KMQT 161840 AAC
CLMMQT

CLIMATE REPORT...PRELIMINARY
NATIONAL WEATHER SERVICE MARQUETTE MI
240 PM EDT TUE SEP 16 2014

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

...THE MARQUETTE MI CLIMATE SUMMARY FOR THE MONTH OF AUGUST 2014...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1961 TO 2014

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            83   08/25        73      10       92  08/25
                        08/09
LOWEST             42   08/28        52     -10       42  08/13
AVG. MAXIMUM     71.3              74.3    -3.0     75.5
AVG. MINIMUM     52.0              53.1    -1.1     53.1
MEAN             61.7              63.7    -2.0     64.3
DAYS MAX >= 90      0               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           4.47              3.05    1.42     2.32
DAILY AVG.       0.14              0.10    0.04     0.07
DAYS >= .01        12              10.7     1.3       14
DAYS >= .10        10               6.1     3.9        7
DAYS >= .50         1               1.9    -0.9        2
DAYS >= 1.00        1               0.7     0.3        0
GREATEST
 24 HR. TOTAL    1.93   08/19 TO 08/19

SNOWFALL (INCHES)
RECORDS
 TOTAL              T   2009
TOTALS            0.0               0.0     0.0      0.0
SINCE 7/1           T               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   08/31 TO 08/31

DEGREE_DAYS
HEATING TOTAL     126               106      20      102
 SINCE 7/1        247               185      62      214
COOLING TOTAL      31                66     -35       90
 SINCE 1/1        147               220     -73      270
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              MM
HIGHEST WIND SPEED/DIRECTION    MM        DATE   MM
HIGHEST GUST SPEED/DIRECTION    27/360    DATE  08/12

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER             MM
NUMBER OF DAYS FAIR            0
NUMBER OF DAYS PC              0
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     MM

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       4
LIGHT RAIN               15     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      10     FOG W/VIS <= 1/4 MILE      2
HAZE                      0

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

&&

...AUGUST 2014 MONTHLY CLIMATE SUMMARY FOR UPPER MICHIGAN...
/THIS DISCUSSION DOES NOT INCLUDE CHIPPEWA AND MACKINAC COUNTIES/

...COOLER THAN NORMAL...

...GENERALLY NEAR TO ABOVE NORMAL MONTHLY PRECIPITATION...

AUGUST CLIMATE STATISTICS FOR THE MARQUETTE NWS IN NEGAUNEE TOWNSHIP

                                    NORMAL   DEPARTURE
AVERAGE TEMPERATURE         61.7     63.7  MINUS    2.0
AVERAGE HIGH TEMPERATURE    71.3     74.3  MINUS    3.0
AVERAGE LOW TEMPERATURE     52.0     53.1  MINUS    1.1
HEATING DEGREE DAYS          126      106   PLUS     20
COOLING DEGREE DAYS           31       66  MINUS     35
TOTAL PRECIPITATION         4.47     3.05   PLUS   1.42
TOTAL SNOWFALL                 0        0             0

HIGHEST TEMPERATURE:                    83 ON 8/9 AND 8/25
LOWEST TEMPERATURE:                     42 ON 8/28
GREATEST CALENDAR DAY PRECIPITATION:  1.93 ON 8/19
GREATEST 24 HOUR PRECIPITATION:       1.94 ON 8/19-8/20
PEAK WIND SPEED:     27 MPH FROM THE NORTH ON 8/12

DAILY RECORD PRECIPITATION ON 8/19...1.93 /OLD RECORD 1.39...2006/
DAILY RECORD HIGH MINIMUM TEMPERATURE TIED ON 8/22...63 /63...1963/
DAILY RECORD HIGH MINIMUM TEMPERATURE TIED ON 8/23...64 /64...1993/
---------------------------------------------------------------------
GREAT LAKES WATER LEVELS (FEET/METERS ABOVE MEAN SEA LEVEL)

                            LAKE SUPERIOR  LAKE MICHIGAN-HURON
08/01/14 DAILY MEAN         602.61/183.67     578.96/176.46
08/31/14 DAILY MEAN         602.62/183.68     579.06/176.50
AVG JUL 2014 DAILY MEAN     602.55/183.66     578.94/176.46
AVG AUG 2013 DAILY MEAN     601.84/183.44     577.68/176.08
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 HOLD NEARLY STEADY IN AUGUST...

AS IS NORMAL...THE LEVELS OF THE WESTERN AND CENTRAL GREAT LAKES
HELD NEARLY STEADY IN AUGUST. NEAR THE END OF AUGUST...THE LAKE
SUPERIOR WATER LEVEL WAS OVER 9 INCHES HIGHER THAN IN AUGUST 2013
AND ALMOST 6 INCHES ABOVE THE LONG TERM NORMAL. THE LEVEL OF LAKES
MICHIGAN/HURON ON 8/28 WAS ALMOST 16 INCHES HIGHER THAN DURING LAST
AUGUST BUT STILL ABOUT 2.5 INCHES BELOW THE LONG TERM AVERAGE.

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...89 AT PELKIE IN BARAGA COUNTY ON 8/25

LOWEST REPORTED TEMPERATURE...29 AT A SITE 15 MILES SOUTH OF MUNISING
                               ON 8/15

HIGHEST AVERAGE TEMPERATURE...65.7 DEGREES AT IRON MOUNTAIN

LOWEST AVERAGE TEMPERATURE...59.0 DEGREES AT HERMAN IN BARAGA COUNTY

HIGHEST MONTHLY PRECIPITATION...5.63 INCHES AT GLADSTONE IN DELTA
                                 COUNTY

LOWEST MONTHLY PRECIPITATION...1.97 INCHES AT STAMBAUGH
                                IN IRON COUNTY

SINCE A NORTHWEST FLOW ALOFT ON THE WESTERN FLANK OF A PERSISTENT
TROUGH IN EASTERN NORTH AMERICA DOMINATED MUCH OF THE TIME IN
AUGUST...ESPECIALLY THE FIRST THREE WEEKS OF THE MONTH...THERE WERE
FREQUENT INCURSIONS OF COOLER CANADIAN AIR INTO THE UPPER GREAT
LAKES. THE RESULT WAS A MEAN MONTHLY TEMPERATURE THAT RAN 1 TO 3
DEGREES BELOW NORMAL AT MOST PLACES. BECAUSE THE LATE ICE MELT IN
SPRING THIS YEAR HELD WATER TEMPERATURES ON THE GREAT LAKES BELOW
AVERAGE EVEN THIS LATE IN THE SUMMER SEASON...EVEN COOLER CONDITIONS
PREVAILED NEAR THE LAKE SHORES WITH THE MONTHLY AVERAGE AT MARQUETTE
AND MUNISING CLOSE TO 4 DEGREES BELOW NORMAL. THE MEAN AUGUST
TEMPERATURE THAT RANGED FROM 59 TO 66 DEGREES WAS WITHIN A FEW
DEGREES OF THE JULY AVERAGE.

MEAN DAILY TEMPERATURES WERE AT OR BELOW NORMAL ON MOST DAYS THROUGH
8/20. THE COOLEST WEEK WAS FROM 8/11 THROUGH 8/18...A TIME WHEN
AVERAGE TEMPERATURES RAN AS MUCH AS 10 TO 15 DEGREES BELOW NORMAL.
AT LEAST ONE OF THE COOLER INTERIOR OBSERVATION SITES REPORTED A LOW
TEMPERATURE IN THE 30S IN THE EARLY MORNING OF 8/6...8/7...8/13
THROUGH 8/15...8/18 AND 8/28. THE ONLY TIME THE THERMOMETER DIPPED
BELOW 30 WAS EARLY ON 8/15...WHEN ONE OF THE TYPICAL COLD SPOTS
INLAND FROM MUNISING REPORTED A MINIMUM OF 29. THERE WERE NO REPORTS
OF 90-DEGREE TEMPERATURES IN AUGUST...EVEN DURING THE WARMEST
STRETCH FROM 8/21 THROUGH 8/25. THE WARMEST DAY OVERALL WAS ON
8/25...WHEN PELKIE IN BARAGA COUNTY SAW THE MERCURY REACH 89 AND THE
DAILY TEMPERATURE AVERAGED ABOUT 10 DEGREES ABOVE NORMAL AT MOST
PLACES.

HIGH PRESSURE TENDED TO DOMINATE AND BRING DRY CONDITIONS MUCH OF
THE FIRST HALF OF AUGUST...BUT THE PATTERN TURNED MORE ACTIVE AND
WETTER DURING THE SECOND HALF OF THE MONTH AS THE UPPER FLOW SHIFTED
TO A MORE WEST-TO-EAST ORIENTATION FOLLOWING A WEAKENING OF THE
TROUGH IN EASTERN CANADA. FREQUENT SHOWERS AND THUNDERSTORMS AFTER
8/15 LIFTED AUGUST RAINFALL NEAR OR ABOVE NORMAL AT MOST PLACES. BUT
BECAUSE OF THE HIT-OR-MISS NATURE OF SUMMER CONVECTION...SOME
LOCATIONS MEASURED BELOW NORMAL MONTHLY RAINFALL. AUGUST
PRECIPITATION RANGED FROM 1.97 INCHES AT STAMBAUGH IN IRON COUNTY...
ABOUT 60 PERCENT OF NORMAL...TO 5.63 INCHES AT GLADSTONE IN DELTA
COUNTY...WHICH IS ALMOST 185 PERCENT OF THE AUGUST AVERAGE FOR THAT
SPOT.

A COLD FRONT SWEEPING ACROSS UPPER MICHIGAN DURING THE AFTERNOON ON
8/3 GENERATED SOME STRONG THUNDERSTORMS THAT DROPPED HEAVY RAIN AND
CAUSED GUSTY WINDS OVER MAINLY THE SOUTH CENTRAL AND EASTERN UPPER
PENINSULA. A LOCATION NEAR STEUBEN IN SCHOOLCRAFT COUNTY REPORTED
1.85 INCHES OF RAIN. AS MUCH AS AN INCH OF RAIN FELL IN 15 MINUTES
AT ESCANABA...WHERE WATER FLOODED SOME STREETS. LOCATIONS NEAR
ESCANABA ALSO REPORTED WIND GUSTS AS HIGH AS 40 TO 45 MPH UNDER SOME
OF THE STRONGER STORMS.

A WAVE OF LOW PRESSURE RIDING NORTH ALONG A SLOW MOVING COLD FRONT
AND UNDER A DEEPENING TROUGH OVER THE GREAT LAKES BROUGHT MODERATE
TO HEAVY RAIN TO SOME LOCATIONS ON 8/11 INTO 8/12. A FEW PLACES SAW
1.50 INCHES OR MORE OF RAIN...INCLUDING AS MUCH AS 1.74 INCHES NEAR
BARAGA. ANOTHER COLD FRONT PASSING THROUGH THE UPPER LAKES DURING
THE NIGHT ON 8/15-8/16 CAUSED SOME SHOWERS AND STORMS THAT DROPPED
HEAVY RAIN ACROSS MAINLY THE KEWEENAW AND NORTH CENTRAL UPPER
MICHIGAN. AS MUCH AS 1.09 INCHES OF RAIN FELL NEAR CALUMET.

A SLOW MOVING UPPER DISTURBANCE AND SURFACE LOW PRESSURE SYSTEM THAT
INTERACTED WITH A VERY HUMID AIRMASS IN PLACE BROUGHT NUMEROUS
SHOWERS AND SOME THUNDERSTORMS WITH HEAVY DOWNPOURS ON 8/18 INTO
8/20. AN INCH OR MORE OF RAIN FELL AT MANY PLACES...INCLUDING 2.54
INCHES AT MOHAWK IN KEWEENAW COUNTY AND 2.19 INCHES AT NEGAUNEE IN
MARQUETTE COUNTY. AREAS OF FOG THAT DEVELOPED WITH THE ABUNDANT
MOISTURE BECAME LOCALLY DENSE DURING THE EARLY MORNINGS ON 8/19 AND
8/20. ANOTHER BATCH OF HEAVY RAIN SHOWERS AND THUNDERSTORMS THAT
DEVELOPED NORTH OF A WARM FRONT IN THE UPPER MIDWEST IMPACTED MAINLY
CENTRAL UPPER MICHIGAN ON 8/23. A LOCATION NEAR CHANNING IN
DICKINSON COUNTY HAD 3.72 INCHES OF RAIN...AND 2.72 INCHES FELL AT
CRYSTAL FALLS IN IRON COUNTY ON 8/23.

AS A POTENT UPPER DISTURBANCE MOVING THROUGH THE NORTHERN PLAINS
BEGAN TO INTERACT WITH A VERY UNSTABLE...WARM AND HUMID AIRMASS OVER
THE GREAT LAKES DURING THE EARLY MORNING HOURS ON 8/25...A BAND OF
SHOWERS AND THUNDERSTORMS ACCOMPANIED BY HEAVY RAINS AND WINDS GUSTS
UP TO 40 TO 45 MPH MOVED INTO WESTERN UPPER MICHIGAN. AS MUCH AS
1.95 INCHES OF RAIN INUNDATED BERGLAND DAM IN ONTONAGON COUNTY.
THESE SHOWERS MARCHED WEST-TO-EAST ACROSS THE U.P. THROUGH THE
MORNING ON 8/25 BUT WEAKENED WITH TIME. THE RETURN OF SUNSHINE IN
THE AFTERNOON BEHIND THIS DIMINISHING BAND LIFTED THE MERCURY WELL
INTO THE 80S AT MANY LOCATIONS.

ANOTHER ROUND OF SOME HEAVY RAIN SHOWERS AND THUNDERSTORMS ARRIVED
OVER WESTERN UPPER MICHIGAN LATE IN THE DAY ON 8/29 AHEAD OF A SLOW
MOVING COLD FRONT THAT CROSSED UPPER MICHIGAN ON 8/30. UNDER THE
SHOWERS PRECEDING THE FRONT...UP TO 1.94 AND 1.80 INCHES OF RAIN
FELL AT IRONWOOD AND MUNISING RESPECTIVELY.
---------------------------------------------------------------------
              ...A COOL SUMMER ACROSS UPPER MICHIGAN...

               ...JUNE-AUGUST 2014 MEAN TEMPERATURE...

              OBSERVED  NORMAL  DEPARTURE     RECORD       2014 RANK

MANISTIQUE      59.9     63.0     -3.1     57.8 /1992/    4TH COOLEST

MUNISING        60.0     62.8     -2.8     56.0 /1920/   14TH COOLEST

MARQUETTE NWS   61.6     63.3     -1.7     57.9 /1992/   18TH COOLEST

IRONWOOD        62.6     63.8     -1.2     58.2 /1992/   18TH COOLEST

MARQUETTE CITY  61.1     64.4     -3.3     58.6 /1915/   19TH COOLEST

NEWBERRY        61.3     63.6     -2.3     57.9 /1992/   20TH COOLEST

HOUGHTON        61.0     62.7     -1.7     57.7 /1950/   25TH COOLEST

IRON MOUNTAIN   65.0     66.0     -1.0     61.8 /1927/       ****

**** NOT IN TOP 25

ALTHOUGH THE MONTH OF JUNE FEATURED SLIGHTLY WARMER THAN NORMAL
CONDITIONS...THE WEATHER IN AUGUST AND ESPECIALLY JULY WAS COOLER
THAN NORMAL. THE RESULT WAS A TOP 25 COOLEST SUMMER AT MOST PLACES
IN UPPER MICHIGAN. IN GENERAL...LOCATIONS NEAR THE CHILLY WATERS OF
THE GREAT LAKES WERE COOLEST RELATIVE TO NORMAL.
---------------------------------------------------------------------
        ...TOP 5 COLDEST START TO THE YEAR AT MOST PLACES...

             ...JANUARY-AUGUST 2014 MEAN TEMPERATURE...

                                          /OR PREVIOUS/
              OBSERVED  NORMAL  DEPARTURE     RECORD      2014 RANK

MANISTIQUE      37.2     42.7     -5.5     38.3 /1994/ RECORD COLDEST

NEWBERRY        38.0     43.3     -5.3     39.7 /1972/ RECORD COLDEST

IRON MOUNTAIN   39.5     44.0     -4.5     40.5 /1950  RECORD COLDEST
                                                &1996/

MARQUETTE NWS   37.3     41.7     -4.4     37.9 /1972/ RECORD COLDEST

IRONWOOD        37.3     42.2     -4.9     37.1 /1917/    2ND COLDEST

MUNISING        37.0     42.5     -5.5     35.2 /1920/    3RD COLDEST

HOUGHTON        37.3     41.5     -4.2     35.8 /1888/    5TH COLDEST

MARQUETTE CITY  38.2     44.4     -6.2     36.0 /1885/    8TH COLDEST
---------------------------------------------------------------------
SOME OTHER TEMPERATURE AND PRECIPITATION OBSERVATIONS ACROSS UPPER
MICHIGAN IN AUGUST 2014 INCLUDE:

IRONWOOD...AVERAGE TEMPERATURE 62.7 (1.4 DEGREES BELOW NORMAL)
           PRECIPITATION 5.06 INCHES (1.69 INCHES ABOVE NORMAL)

WATERSMEET (GOGEBIC COUNTY)...PRECIPITATION 3.98 INCHES

ONTONAGON...AVERAGE TEMPERATURE 64.4 (1.7 DEGREES BELOW NORMAL)
 (6 MILES   PRECIPITATION 4.91 INCHES (2.05 INCHES ABOVE NORMAL)
  INLAND)

GREENLAND (ONTONAGON COUNTY)...AVERAGE TEMPERATURE 61.1 DEGREES
                               PRECIPITATION 3.35 INCHES

BERGLAND DAM (ONTONAGON COUNTY)...PRECIPITATION 4.72 INCHES

HOUGHTON COUNTY...AVERAGE TEMPERATURE 61.5 (2.4 DEGREES BELOW NORMAL)
 AIRPORT         PRECIPITATION 4.25 INCHES (1.84 INCHES ABOVE NORMAL)

ATLANTIC MINE (HOUGHTON COUNTY)...PRECIPITATION 3.37 INCHES

MOHAWK (KEWEENAW COUNTY)...PRECIPITATION 5.33 INCHES

COPPER HARBOR...AVERAGE TEMPERATURE 61.6 DEGREES
                PRECIPITATION 2.92 INCHES

JACOBSVILLE (HOUGHTON COUNTY)...AVERAGE TEMPERATURE 60.1 DEGREES
                                PRECIPITATION 3.38 INCHES

BARAGA...AVERAGE TEMPERATURE 63.3 DEGREES
         PRECIPITATION 3.46 INCHES

WATTON (BARAGA COUNTY)...AVERAGE TEMPERATURE 60.9 DEGREES
                         PRECIPITATION 3.16 INCHES

HERMAN (BARAGA COUNTY)...AVERAGE TEMPERATURE 59.0 DEGREES
                         PRECIPITATION 2.36 INCHES

CLARKSBURG (MARQUETTE COUNTY)...AVERAGE TEMPERATURE 60.6 DEGREES
                                PRECIPITATION 3.79 INCHES

BIG BAY (MARQUETTE COUNTY)...AVERAGE TEMPERATURE 61.2 DEGREES
                             PRECIPITATION 3.31 INCHES

MARQUETTE CITY...AVERAGE TEMPERATURE 63.0 (3.6 DEGREES BELOW NORMAL)
                 PRECIPITATION 2.94 INCHES (0.31 INCH ABOVE NORMAL)

HARVEY (MARQUETTE COUNTY)...AVERAGE TEMPERATURE 63.3 DEGREES
                            PRECIPITATION 2.25 INCHES

GWINN (MARQUETTE COUNTY)...PRECIPITATION 3.66 INCHES

CHATHAM (ALGER COUNTY)...AVERAGE TEMPERATURE 62.3 DEGREES
                         PRECIPITATION 3.18 INCHES

MUNISING...AVERAGE TEMPERATURE 60.9 (3.6 DEGREES BELOW NORMAL)
           PRECIPITATION 3.26 INCHES (0.07 INCH BELOW NORMAL)

NEWBERRY...AVERAGE TEMPERATURE 61.7 (2.9 DEGREES BELOW NORMAL)
           PRECIPITATION 2.83 INCHES (0.40 INCH BELOW NORMAL)

STAMBAUGH (IRON COUNTY)...PRECIPITATION 1.97 INCHES

AMASA (IRON COUNTY)...PRECIPITATION 4.08 INCHES

IRON MOUNTAIN...AVERAGE TEMPERATURE 65.7 (0.7 DEGREE BELOW NORMAL)
                PRECIPITATION 3.14 INCHES (0.12 INCH BELOW NORMAL)

NORWAY (DICKINSON COUNTY)...PRECIPITATION 3.74 INCHES

DAGGETT (MENOMINEE COUNTY)...PRECIPITATION 3.45 INCHES

MENOMINEE...PRECIPITATION 3.80 INCHES

ESCANABA...AVERAGE TEMPERATURE 64.8 DEGREES
 (INLAND)  PRECIPITATION 4.60 INCHES

GLADSTONE (DELTA COUNTY)...PRECIPITATION 5.63 INCHES

GARDEN CORNERS (DELTA COUNTY)...AVERAGE TEMPERATURE 62.7 DEGREES
                                PRECIPITATION 4.39 INCHES

COOKS (SCHOOLCRAFT COUNTY)...PRECIPITATION 3.56 INCHES

MANISTIQUE...AVERAGE TEMPERATURE 62.0 (2.6 DEGREES BELOW NORMAL)
             PRECIPITATION 3.02 INCHES (0.23 INCH BELOW 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 2014.

                       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 1029 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 AND EARLY WINTER

THE CLIMATE PREDICTION CENTER (CPC) IS FORECASTING A GREATER THAN
CLIMATOLOGICAL CHANCE OF AN ABOVE NORMAL 3-MONTH AVERAGE TEMPERATURE
BUT EQUAL CHANCES OF ABOVE AND BELOW NORMAL 3-MONTH PRECIPITATION
OVER ALL OF UPPER MICHIGAN IN OCTOBER THROUGH DECEMBER 2014.

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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