Climatological Report (Monthly)
Issued by NWS Grand Rapids, MI

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000
CXUS53 KGRR 011030
CLMGRR

CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS, MI
621 AM EDT TUE OCT 1 2013

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

...THE GRAND RAPIDS MI CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2013...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1892 TO 2013

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              98   09/02/1913
                        09/16/1899
 LOW               27   09/28/1991
HIGHEST            94   09/10        87       7       89  09/03
LOWEST             38   09/17        35       3       39  09/24
                        09/23                             09/19
AVG. MAXIMUM     74.6              73.0     1.6     74.2
AVG. MINIMUM     52.9              52.7     0.2     51.7
MEAN             63.7              62.8     0.9     63.0
DAYS MAX >= 90      1               0.3     0.7        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               0.1    -0.1        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        11.85   1986
 MINIMUM         0.00   1979
TOTALS           1.25              4.28   -3.03     1.97
DAILY AVG.       0.04              0.14   -0.10     0.07
DAYS >= .01         6              10.7    -4.7        9
DAYS >= .10         4               6.9    -2.9        6
DAYS >= .50         1               2.7    -1.7        1
DAYS >= 1.00        0               1.0    -1.0        1
GREATEST
 24 HR. TOTAL    0.76   09/09 TO 09/09           09/04 TO 09/04



SNOWFALL (INCHES)
RECORDS
 TOTAL              T   2003
 24 HR TOTAL        T   MM
 SNOW DEPTH         T   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 >= TRACE       0               0.0     0.0        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     112               132     -20      125
 SINCE 7/1        138               152     -14      134
COOLING TOTAL      83                67      16       73
 SINCE 1/1        753               692      61     1035

FREEZE DATES
RECORD
 EARLIEST     09/03/1946
 LATEST       06/04/1945
EARLIEST                        10/13
LATEST                          05/02
..........................................................

WIND (MPH)
AVERAGE WIND SPEED              7.2
RESULTANT WIND SPEED/DIRECTION   1/223
HIGHEST WIND SPEED/DIRECTION    24/240    DATE  09/10
HIGHEST GUST SPEED/DIRECTION    33/240    DATE  09/10

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   70
AVERAGE SKY COVER           0.50

AVERAGE RH (PERCENT)     68

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              3     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       3
LIGHT RAIN               10     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      17     FOG W/VIS <= 1/4 MILE      1
HAZE                      5

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

&&

SEPTEMBER 2013 FEATURED NEAR TO SLIGHTLY ABOVE NORMAL TEMPERATURES
WITH WELL BELOW NORMAL RAINFALL. LITTLE ACTIVE WEATHER WAS RECORDED
DURING THE MONTH WITH ONLY TWO NOTABLE THUNDERSTORM EVENTS THAT
OCCURRED IN THE SOUTHWEST MICHIGAN AREA.

SEPTEMBER STARTED ON A FAIRLY MILD NOTE WITH TYPICAL READINGS IN THE
70S TO NEAR 80 DEGREES. THEN...TEMPERATURES ROSE CONSIDERABLY AS A
STRONG WARM FRONT MOVED THROUGH. HIGHS IN THE LOWER 90S WERE
RECORDED AWAY FROM THE LAKE. A RECORD HIGH TEMPERATURE OF 94 DEGREES
WAS REPORTED AT GRAND RAPIDS ON THE 10TH. DURING THIS WARM
SURGE...LOCALLY VERY HEAVY RAINFALL OCCURRED ALONG THE WARM FRONT
ACROSS WEST MICHIGAN. TWO NARROW LINES OF THUNDERSTORMS DEVELOPED
ALONG THE FRONT AND HELPED PRODUCE EXCESSIVE BUT VERY LOCALIZED
RAINFALL ACROSS PRIMARILY OTTAWA...KENT...BARRY...KALAMAZOO...AND
CALHOUN COUNTIES. OTHER AREAS RECEIVED LESSER AMOUNTS OF RAIN OR NO
RAIN AT ALL. STORM TOTAL RAINFALL REACHED THE 2 TO 5 INCH RANGE WITH
OVER 5.5 INCHES RECORDED NEAR BYRON CENTER DURING THIS EVENT. ROADS
FLOODED IN THESE AREAS AS DRAINAGE SYSTEMS COULD NOT KEEP UP WITH
THE RAINFALL RATES.

ON SEPTEMBER 11...A SEVERE THUNDERSTORM STRUCK THE ALBION AREA WITH
WIND GUSTS THAT REACHED THE 70 TO 80 MPH RANGE. A NATIONAL WEATHER
SERVICE STORM SURVEY WAS CONDUCTED THAT VERIFIED STRAIGHT LINE WIND
DAMAGE ASSOCIATED WITH THIS STORM. SIGNIFICANT TREE DAMAGE ALONG
WITH SOME MINOR STRUCTURAL DAMAGE WAS REPORTED THROUGHOUT ALBION.
THE DOWNTOWN DISTRICT WAS AFFECTED WITH SOME ROOFING AND STRUCTURAL
DAMAGE ALONG WITH SOME WINDOWS BROKEN OUT OF SOME BUILDINGS DUE TO
ROOFING MATERIAL THAT CAME LOOSE AND BLEW INTO THE WINDOWS.

THE SECOND HALF OF SEPTEMBER FEATURED A MIX OF COOL AND MILD
TEMPERATURES ALONG WITH MAINLY DRY WEATHER. A COLD FRONT THAT MOVED
THROUGH ON THE 29TH ONLY PRODUCED A FEW TENTHS OF AN INCH OF
RAIN...WHICH DID LITTLE TO IMPROVE THE DRY CONDITIONS ACROSS THE
REGION.

$$

HOVING






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