Climatological Report (Monthly)
Issued by NWS Marquette, MI

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000
CXUS53 KMQT 150933 AAB
CLMMQT

CLIMATE REPORT...PRELIMINARY
NATIONAL WEATHER SERVICE MARQUETTE MI
533 AM EDT THU SEP 15 2016

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

...THE MARQUETTE MI CLIMATE SUMMARY FOR THE MONTH OF AUGUST 2016...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1961 TO 2016

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            85   08/18        73      12       90  08/16
                        08/09
                        08/04
LOWEST             45   08/22        52      -7       39  08/27
AVG. MAXIMUM     75.4              74.3     1.1     73.7
AVG. MINIMUM     56.5              53.1     3.4     54.3
MEAN             65.9              63.7     2.2     64.0
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           4.53              3.05    1.48     2.70
DAILY AVG.       0.15              0.10    0.05     0.09
DAYS >= .01        14              10.7     3.3       11
DAYS >= .10         8               6.1     1.9        9
DAYS >= .50         3               1.9     1.1        1
DAYS >= 1.00        1               0.7     0.3        0
GREATEST
 24 HR. TOTAL    1.65   08/19 TO 08/20

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

DEGREE_DAYS
HEATING TOTAL      45               106     -61      100
 SINCE 7/1        100               185     -85      168
COOLING TOTAL      82                66      16       74
 SINCE 1/1        236               220      16      182
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              MM
HIGHEST WIND SPEED/DIRECTION    MM        DATE   MM
HIGHEST GUST SPEED/DIRECTION    33/180    DATE  08/04

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                1     RAIN                       1
LIGHT RAIN               18     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       8     FOG W/VIS <= 1/4 MILE      4
HAZE                      0

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

&&

...AUGUST 2016 MONTHLY CLIMATE SUMMARY FOR UPPER MICHIGAN...
/THIS DISCUSSION DOES NOT INCLUDE CHIPPEWA AND MACKINAC COUNTIES/

...WARMER THAN NORMAL...
...FOURTH WARMEST AUGUST AT IRON MOUNTAIN...
...FIFTH WARMEST AUGUST AT NEWBERRY...
...SEVENTH WARMEST AUGUST AT MANISTIQUE...
...EIGHTH WARMEST AUGUST AT THE MARQUETTE NWS...
...NINTH WARMEST AUGUST AT MUNISING...

...WETTER THAN NORMAL ESPECIALLY OVER THE NORTHWEST HALF...
...TENTH HIGHEST AUGUST RAINFALL AT THE MARQUETTE NWS...

AUGUST CLIMATE STATISTICS FOR THE MARQUETTE NWS IN NEGAUNEE TOWNSHIP

                                    NORMAL   DEPARTURE
AVERAGE TEMPERATURE         65.9     63.7   PLUS    2.2
AVERAGE HIGH TEMPERATURE    75.4     74.3   PLUS    1.1
AVERAGE LOW TEMPERATURE     56.5     53.1   PLUS    3.4
HEATING DEGREE DAYS           45      106  MINUS     61
COOLING DEGREE DAYS           82       66   PLUS     16
TOTAL PRECIPITATION         4.53     3.05   PLUS   1.48
TOTAL SNOWFALL                 0        0             0

HIGHEST TEMPERATURE:                    85 ON 8/3...8/4...8/9
                                               AND 8/18
LOWEST TEMPERATURE:                     45 ON 8/22
GREATEST CALENDAR DAY PRECIPITATION:  1.59 ON 8/20
GREATEST 24 HOUR PRECIPITATION:       1.65 ON 8/19-8/20
GREATEST CALENDAR DAY SNOWFALL:          0
PEAK WIND SPEED:     33 MPH FROM THE SOUTH ON 8/4

DAILY RECORD PRECIPITATION ON 8/11...0.67 /OLD RECORD 0.52...2004/
DAILY RECORD PRECIPITATION ON 8/20...1.59 /0.48...1997/
TENTH HIGHEST AUGUST PRECIPITATION...4.53 /RECORD 8.59...1988/
---------------------------------------------------------------------
  ...SEPTEMBER THROUGH AUGUST CLIMATE STATS FOR THE MARQUETTE NWS...

            ...FOURTH WARMEST SEPTEMBER THROUGH AUGUST...
                       ...WETTER THAN NORMAL...

                         AVERAGE TEMPERATURE

              OBSERVED NORMAL DEPARTURE     RECORD           RANK
MARQUETTE NWS   42.8    40.1    +2.7     44.4 /2011-12/   4TH WARMEST

                            PRECIPITATION

              OBSERVED NORMAL DEPARTURE     RECORD           RANK
MARQUETTE NWS  39.33   35.68    +3.65   45.56 /1972-73/  14TH HIGHEST
---------------------------------------------------------------------
GREAT LAKES WATER LEVELS (FEET/METERS ABOVE MEAN SEA LEVEL)

                            LAKE SUPERIOR  LAKE MICHIGAN-HURON
8/01/16 DAILY MEAN          602.70/183.70     580.14/176.83
8/31/16 DAILY MEAN          602.69/183.70     580.09/176.81
AVG JUL 2016 DAILY MEAN     602.66/183.69     580.17/176.84
AVG AUG 2015 DAILY MEAN     602.63/183.68     579.81/176.72
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...

GENERALLY ABUNDANT RAINFALL AROUND THE WESTERN GREAT LAKES THROUGH
THE SUMMER ALLOWED WATER LEVELS ON LAKES SUPERIOR, MICHIGAN AND
HURON TO REMAIN NEARLY STEADY IN AUGUST DESPITE INCREASING WATER
TEMPERATURES THAT ENHANCED EVAPORATION. AT THE END OF AUGUST, WATER
LEVELS ON LAKE SUPERIOR WERE 6 TO 7 INCHES ABOVE NORMAL AND WITHIN
AN INCH OF THE LEVEL OBSERVED IN AUGUST 2015. THE LEVEL ON LAKES
MICHIGAN AND HURON WAS 10 TO 11 INCHES ABOVE AVERAGE ON 8/31 AND 3
TO 4 INCHES HIGHER THAN IN AUGUST 2015.

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.
---------------------------------------------------------------------
                       AUGUST CLIMATE HIGHLIGHTS

HIGHEST REPORTED TEMPERATURE...93 AT A SPOT ABOUT 10 MILES SOUTH OF
                                MUNISING ON 8/3

LOWEST REPORTED TEMPERATURE...33 AT THE SPOT SOUTH OF MUNISING
                               ON 8/22

HIGHEST AVERAGE TEMPERATURE...70.1 DEGREES AT IRON MOUNTAIN

LOWEST AVERAGE TEMPERATURE...62.7 DEGREES AT HERMAN IN BARAGA COUNTY

HIGHEST MONTHLY PRECIPITATION...7.18 INCHES AT HERMAN

LOWEST MONTHLY PRECIPITATION...2.97 INCHES AT NEWBERRY

WHILE THERE WERE NO EXTENDED, EXCESSIVE HEAT WAVES OVER UPPER
MICHIGAN IN AUGUST, A PREVAILING SOUTHWEST FLOW AROUND HIGH PRESSURE
THAT DOMINATED TO THE SOUTH AND EAST PREVENTED MORE THAN OCCASIONAL
INFLUXES OF COOLER CANADIAN AIR AND THUS BROUGHT WARMER THAN NORMAL
WEATHER MOST OF THE DAYS DURING THE MONTH ACROSS THE U.P. THE RESULT
WAS A MEAN AUGUST TEMPERATURE THAT RAN 2 TO 4 DEGREES ABOVE NORMAL.
MEAN MONTHLY TEMPERATURES BETWEEN ABOUT 63 TO 70 DEGREES WERE NEARLY
THE SAME AS THE JULY AVERAGE TO UP TO 3 DEGREES HIGHER THAN THE
VALUES OBSERVED IN JULY. MAXIMUM TEMPERATURES AT OR ABOVE 90 WERE
INFREQUENT AND OCCURRED ONLY ON 8/3 AND 8/4. LIKEWISE, THE ONLY DAY
THAT ANY SPOT ACROSS THE U.P. SAW THE MERCURY FALL INTO THE 30S WAS
ON 8/22.

AT MOST PLACES, THE DEPARTURE OF THE MONTHLY AVERAGE MINIMUM
TEMPERATURE FROM NORMAL WAS GREATER THAN THE MAXIMUM TEMPERATURE
ANOMALY. FOR INSTANCE AT NEWBERRY, THE AVERAGE AUGUST LOW
TEMPERATURE OF 59.5 DEGREES WAS 5.5 DEGREES ABOVE NORMAL WHILE THE
77.1 DEGREE MEAN MAXIMUM TEMPERATURE WAS ONLY 1.9 DEGREES ABOVE
AVERAGE.

AT MANY PLACES, AUGUST 2016 GOES DOWN IN THE RECORD BOOKS AS THE
AUGUST WITH THE FEWEST DAYS THAT HAD A MINIMUM TEMPERATURE UNDER 50.
FOR INSTANCE AT IRON MOUNTAIN, THERE WAS ONLY ONE MORNING WHEN THE
LOW TEMPERATURE FELL UNDER 50, COMPARED TO AN AVERAGE OF NINE DAYS
WHEN READINGS FALL BELOW THAT MARK DURING A TYPICAL AUGUST.

THE PREDOMINATING SOUTHWEST FLOW ALSO TRANSPORTED MOIST AIRMASSES
INTO THE UPPER GREAT LAKES. FREQUENT EPISODES OF SHOWERS AND
THUNDERSTORMS WERE THE RESULT AS PASSING DISTURBANCES INTERACTED
WITH THIS MOISTURE. AS HAS BEEN THE CASE THE LAST COUPLE OF MONTHS,
THE HEAVIEST RAINS TENDED TO FALL OVER THE NORTHWEST HALF OF UPPER
MICHIGAN. MANY PLACES IN THIS AREA PICKED UP 5 OR MORE INCHES OF
RAIN DURING AUGUST, WITH AS MUCH AS 7.18 INCHES FALLING OVER THE
HIGHER TERRAIN OF THE HURON MOUNTAINS AT HERMAN IN BARAGA COUNTY.
THE RAINFALL TOTALS OVER THE NORTHWEST HALF WERE AS MUCH AS 150-175
PERCENT OF THE AVERAGE AUGUST PRECIPITATION AT THESE SPOTS. AREAS
ACROSS EASTERN UPPER MICHIGAN SAW THE LEAST RAIN. THE 2.97 INCHES
THAT FELL AT NEWBERRY IS ABOUT 90 PERCENT OF THE TYPICAL AUGUST
RAINFALL THERE.
---------------------------------------------------------------------
  ...JUNE THROUGH AUGUST SUMMER CLIMATE STATS FOR UPPER MICHIGAN...

           ...ABOVE NORMAL PRECIPITATION AT MOST PLACES...

                         AVERAGE TEMPERATURE

               OBSERVED NORMAL DEPARTURE    RECORD          RANK
NEWBERRY         65.1    63.6    +1.5     67.9 /1955/   12TH WARMEST

IRON MOUNTAIN    68.0    66.0    +2.0     71.2 /1921/   13TH WARMEST

MARQUETTE NWS    64.0    63.3    +0.7     65.8 /2012/   16TH WARMEST

MANISTIQUE       64.0    63.0    +1.0     67.6 /1955/   18TH WARMEST

MUNISING         63.8    62.8    +1.0     67.2 /1955/   20TH WARMEST

HOUGHTON         64.2    62.7    +1.5     67.1 /1995/       ****

IRONWOOD         64.8    63.8    +1.0     68.2 /1933/       ****

                            PRECIPITATION

               OBSERVED NORMAL DEPARTURE    RECORD          RANK
MANISTIQUE      12.85    8.86    +3.99   15.21 /2010/    8TH HIGHEST

MARQUETTE NWS   11.56    8.73    +2.83   17.89 /1968/    9TH HIGHEST

IRONWOOD        16.84   11.13    +5.71   20.96 /1909/   10TH HIGHEST

MUNISING        11.91    9.11    +2.80   17.35 /2010/   21ST HIGHEST

HOUGHTON        10.15    7.48    +2.67   16.49 /1951/       ****

MARQUETTE CITY  10.60    8.13    +2.47   17.29 /1949/       ****

NEWBERRY         8.97    9.31    -0.34   16.07 /1952/       ****

IRON MOUNTAIN    9.81   10.19    -0.38   21.80 /1951/       ****

**** RANK NOT IN TOP 25

---------------------------------------------------------------------
   ...SEPTEMBER THROUGH AUGUST CLIMATE STATS FOR UPPER MICHIGAN...

               ...TOP FIVE WARMEST AT MOST PLACES...
          ...ABOVE NORMAL PRECIPITATION AT MOST PLACES...
                  ...RECORD WETTEST AT IRONWOOD...

                         AVERAGE TEMPERATURE

               OBSERVED NORMAL DEPARTURE    RECORD           RANK
IRON MOUNTAIN    45.7    42.3    +3.4   46.6 /2011-12/    2ND WARMEST

MANISTIQUE       44.3    41.8    +2.5   45.2 /2011-12/    2ND WARMEST

HOUGHTON         43.9    40.5    +3.4   44.9 /2011-12/    4TH WARMEST

NEWBERRY         44.9    42.0    +2.9   46.5 /2011-12/    4TH WARMEST

MARQUETTE NWS    42.8    40.1    +2.7   44.4 /2011-12/    4TH WARMEST

MUNISING         44.2    42.1    +2.1   45.5 /2011-12/    5TH WARMEST

IRONWOOD         43.2    40.1    +3.1   44.6 /2011-12/    8TH WARMEST

                            PRECIPITATION

                                        /OR PREVIOUS/
              OBSERVED NORMAL DEPARTURE    RECORD            RANK
IRONWOOD       51.44   34.93   +16.51  51.37 /2012-13/ RECORD HIGHEST

MANISTIQUE     38.90   30.17    +8.73  41.43 /1978-79/    2ND HIGHEST

MUNISING       42.90   38.45    +4.45  49.00 /1959-60/    6TH HIGHEST

MARQUETTE NWS  39.33   35.68    +3.65  45.56 /1972-73/   14TH HIGHEST

NEWBERRY       34.99   34.23    +0.76  53.30 /2001-02/   19TH HIGHEST

IRON MOUNTAIN  31.93   29.72    +2.21  37.87 /1998-99/   24TH HIGHEST

MARQUETTE CITY 33.55   29.13    +4.42  36.82 /1995-96/       ****

HOUGHTON       35.88   32.18    +3.70  44.73 /1950-51/       ****

**** RANK NOT IN TOP 25
---------------------------------------------------------------------
SOME OTHER TEMPERATURE AND PRECIPITATION OBSERVATIONS ACROSS UPPER
MICHIGAN IN AUGUST 2016 INCLUDE:

IRONWOOD...AVERAGE TEMPERATURE 66.3 /2.2 DEGREES ABOVE NORMAL/
           PRECIPITATION 4.49 INCHES /1.12 INCHES ABOVE NORMAL/

WATERSMEET (GOGEBIC COUNTY)...PRECIPITATION 5.64 INCHES

GREENLAND (ONTONAGON COUNTY)...AVERAGE TEMPERATURE 65.4 DEGREES
                               PRECIPITATION 4.75 INCHES

BERGLAND DAM (ONTONAGON COUNTY)...AVERAGE TEMPERATURE 67.6 DEGREES
                                  PRECIPITATION 5.57 INCHES

HOUGHTON COUNTY...AVERAGE TEMPERATURE 67.0 /3.1 DEGREES ABOVE NORMAL/
 AIRPORT          PRECIPITATION 3.65 INCHES /1.24 INCHES ABOVE NORMAL/

ATLANTIC MINE (HOUGHTON COUNTY)...PRECIPITATION 6.65 INCHES

COPPER HARBOR...AVERAGE TEMPERATURE 67.6 DEGREES
                PRECIPITATION 2.99 INCHES

JACOBSVILLE (HOUGHTON COUNTY)...AVERAGE TEMPERATURE 64.8 DEGREES
                                PRECIPITATION 5.83 INCHES

BARAGA...AVERAGE TEMPERATURE 68.8 DEGREES
         PRECIPITATION 5.00 INCHES

HERMAN (BARAGA COUNTY)...AVERAGE TEMPERATURE 62.7 DEGREES
                         PRECIPITATION 7.18 INCHES

CLARKSBURG (MARQUETTE COUNTY)...AVERAGE TEMPERATURE 64.8 DEGREES
                                PRECIPITATION 4.32 INCHES

MARQUETTE CITY...AVERAGE TEMPERATURE 69.1 /2.5 DEGREES ABOVE NORMAL/
                 PRECIPITATION 4.14 INCHES /1.51 INCHES ABOVE NORMAL/

CHATHAM (ALGER COUNTY)...AVERAGE TEMPERATURE 68.3 DEGREES
                         PRECIPITATION 3.67 INCHES

MUNISING...AVERAGE TEMPERATURE 66.9 /2.4 DEGREES ABOVE NORMAL/
           PRECIPITATION 4.32 INCHES /0.84 INCH ABOVE NORMAL/

NEWBERRY...AVERAGE TEMPERATURE 68.3 /3.7 DEGREES ABOVE NORMAL/
           PRECIPITATION 2.97 INCHES /0.26 INCH BELOW NORMAL/


STAMBAUGH (IRON COUNTY)...AVERAGE TEMPERATURE 64.8 DEGREES
                          PRECIPITATION 6.52 INCHES

AMASA (IRON COUNTY)...AVERAGE TEMPERATURE 66.7 DEGREES
                      PRECIPITATION 5.19 INCHES

FORD AIRPORT...AVERAGE TEMPERATURE 68.5 DEGREES
 NEAR IRON MOUNTAIN

IRON MOUNTAIN...AVERAGE TEMPERATURE 70.1 /3.7 DEGREES ABOVE NORMAL/
                PRECIPITATION 3.56 INCHES /0.30 INCH ABOVE NORMAL/

DAGGETT (MENOMINEE COUNTY)...PRECIPITATION 3.02 INCHES

MENOMINEE...PRECIPITATION 3.85 INCHES

ESCANABA...PRECIPITATION 3.30 INCHES

GLADSTONE (DELTA COUNTY)...PRECIPITATION 4.80 INCHES

GARDEN CORNERS (DELTA COUNTY)...AVERAGE TEMPERATURE 67.9 DEGREES
                                PRECIPITATION 4.17 INCHES

COOKS (SCHOOLCRAFT COUNTY)...PRECIPITATION 4.62 INCHES

MANISTIQUE...AVERAGE TEMPERATURE 68.0 /3.4 DEGREES ABOVE NORMAL/
             PRECIPITATION 4.43 INCHES /1.18 INCHES 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 OVER THE WEST
HALF OF UPPER MICHIGAN BUT A GREATER THAN CLIMATOLOGICAL CHANCE OF AN
ABOVE NORMAL MONTHLY MEAN OVER THE EAST HALF IN SEPTEMBER 2016. THE
CPC FORECAST SHOWS A GREATER THAN CLIMATOLOGICAL CHANCE FOR ABOVE
NORMAL MONTHLY PRECIPITATION OVER WESTERN AND CENTRAL UPPER MICHIGAN
BUT EQUAL CHANCES FOR ABOVE AND BELOW NORMAL RAINFALL OVER THE EAST
IN SEPTEMBER.

                        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 1021 AM
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.

SEPTEMBER 2015 WAS QUITE WARM OVER ALL OF UPPER MICHIGAN AND THE
WARMEST NINTH MONTH ON RECORD AT NEWBERRY AND MANISTIQUE THANKS TO
PERSISTENT UPPER RIDGE THAT DOMINATED CENTRAL AND EASTERN NORTH
AMERICA. MOST PLACES EXPERIENCED ONE OF THEIR TOP FIVE WARMEST
SEPTEMBERS IN 2015, WHEN MEAN MONTHLY TEMPERATURES RAN 5 TO 7
DEGREES ABOVE NORMAL. SEPTEMBER 2004 WAS ALSO DOMINATED BY AN UPPER
RIDGE AND QUITE WARM, WITH A MONTHLY AVERAGE TEMPERATURE 3 TO 8
DEGREES ABOVE NORMAL ENOUGH TO PLACE THAT SEPTEMBER AMONG THE TOP
TEN WARMEST AT MOST LOCATIONS. THAT MONTH ENDED UP AS THE WARMEST
SEPTEMBER ON RECORD AT ONTONAGON AND THE MARQUETTE NWS OFFICE. IN
FACT, 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 2009 WAS ALSO QUITE BALMY WITH MONTHLY AVERAGE
TEMPERATURES 4 TO 6 DEGREES ABOVE THE 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 CPC IS FORECASTING A GREATER THAN CLIMATOLOGICAL CHANCE OF AN
ABOVE NORMAL 3-MONTH AVERAGE TEMPERATURE BUT EQUAL CHANGES OF ABOVE
AND BELOW NORMAL 3-MONTH PRECIPITATION OVER ALL OF UPPER MICHIGAN IN
OCTOBER THROUGH DECEMBER 2016.

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.

THE 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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