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000
CXUS53 KGRR 011634 CCA
CLMGRR

CLIMATE REPORT...CORRECTED
NATIONAL WEATHER SERVICE GRAND RAPIDS, MI
1209 PM EDT MON OCT 1 2012

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

...THE GRAND RAPIDS MI CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2012...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1892 TO 2012

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            89   09/03        87       2       91  09/02
LOWEST             39   09/24        35       4       39  09/16
                        09/19
AVG. MAXIMUM     74.2              73.0     1.2     71.7
AVG. MINIMUM     51.7              52.7    -1.0     52.1
MEAN             63.0              62.8     0.2     61.9
DAYS MAX >= 90      0               0.3    -0.3        2
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           1.97              4.28   -2.31     2.23
DAILY AVG.       0.07              0.14   -0.07     0.07
DAYS >= .01         9              10.7    -1.7       10
DAYS >= .10         6               6.9    -0.9        6
DAYS >= .50         1               2.7    -1.7        1
DAYS >= 1.00        1               1.0     0.0        0
GREATEST
 24 HR. TOTAL    1.11   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
 LIQUID EQUIV    0.00              0.00    0.00     0.00
SINCE 7/1         0.0               0.0     0.0      0.0
 LIQUID 7/1      0.00              0.00    0.00     0.00
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   09/29 TO 09/29

DEGREE_DAYS
HEATING TOTAL     125               132      -7      157
 SINCE 7/1        134               152     -18      157
COOLING TOTAL      73                67       6       73
 SINCE 1/1       1035               692     343      887

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

WIND (MPH)
AVERAGE WIND SPEED              7.4
RESULTANT WIND SPEED/DIRECTION   2/225
HIGHEST WIND SPEED/DIRECTION    31/270    DATE  09/21
HIGHEST GUST SPEED/DIRECTION    38/250    DATE  09/21

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   74
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR            8
NUMBER OF DAYS PC             19
NUMBER OF DAYS CLOUDY          3

AVERAGE RH (PERCENT)     65

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              3     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       3
LIGHT RAIN               11     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       9     FOG W/VIS <= 1/4 MILE      0
HAZE                      2

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

&&

THE AVERAGE TEMPERATURES IN SEPTEMBER 2012 WERE CLOSE TO NORMAL. IT
WAS THE SECOND MONTH IN A ROW WITH NEAR NORMAL TEMPERATURES. HIGHS
WERE MOSTLY IN THE 80S DURING THE FIRST WEEK OF THE MONTH. NEAR TO
BELOW NORMAL TEMPERATURES PREVAILED DURING THE REST OF THE MONTH.
THE COLDEST PERIOD WAS FROM THE 18TH THROUGH THE 24TH... WHEN
TEMPERATURES WERE AS MUCH AS TEN DEGREES BELOW NORMAL. THE COLDEST
TEMPERATURE IN SOUTHWEST LOWER MICHIGAN WAS 24 DEGREES RECORDED ON
THE 24TH AT LEOTA. THE HIGHEST TEMPERATURE DURING SEPTEMBER WAS 95
DEGREES AT HOLLAND ON THE 3RD.

RAINFALL WAS BELOW NORMAL ACROSS ALL OF SOUTHWEST LOWER MICHIGAN.
LANSING REPORTED THE HIGHEST RAINFALL WITH 2.88 INCHES OF
PRECIPITATION. THIS WAS A HALF INCH BELOW NORMAL. MUSKEGON...
WITH ONLY AN INCH OF PRECIPITATON... WAS THE DRIEST STATION. THIS
WAS NEARLY THREE INCHES BELOW NORMAL.

AS IN AUGUST... THERE WAS A NOTEABLE LACK OF SEVERE WEATHER. THERE
WAS ONE SIGNIFICANT SEVERE STORM ESPISODE ON THE 22ND. THIS FEATURED
NUMEROUS WATER SPOUTS AND HAIL FROM A QUARTER OF AN INCH IN DIAMETER
UP TO 7/8 INCH. DAMAGING WINDS WERE ALSO REPORTED ALONG THE LAKE
SHORE BETWEEN LITTLE SABLE POINT AND GRAND HAVEN.

$$

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