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

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CXUS53 KGRR 011037
CLMGRR


CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS, MI
629 AM EDT SUN OCT 1 2017

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

...THE GRAND RAPIDS MI (ASOS) CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1892 TO 2017

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            96   09/23        87       9       90  09/06
LOWEST             41   09/30        35       6       48  09/27
AVG. MAXIMUM     79.2              73.0     6.2     76.0
AVG. MINIMUM     53.8              52.7     1.1     56.9
MEAN             66.5              62.8     3.7     66.4
DAYS MAX >= 90      6               0.3     5.7        1
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           0.66              4.28   -3.62     2.40
DAILY AVG.       0.02              0.14   -0.12     0.08
DAYS >= .01         6              10.7    -4.7       10
DAYS >= .10         3               6.9    -3.9        7
DAYS >= .50         0               2.7    -2.7        0
DAYS >= 1.00        0               1.0    -1.0        0
GREATEST
 24 HR. TOTAL    0.35   09/07 TO 09/07

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   09/30 TO 09/30

DEGREE_DAYS
HEATING TOTAL      83               132     -49       44
 SINCE 7/1         99               152     -53       44
COOLING TOTAL     136                67      69       95
 SINCE 1/1        708               692      16      926

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

WIND (MPH)
AVERAGE WIND SPEED              6.6
RESULTANT WIND SPEED/DIRECTION   1/196
HIGHEST WIND SPEED/DIRECTION    31/240    DATE  09/04
HIGHEST GUST SPEED/DIRECTION    40/240    DATE  09/04

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   77
AVERAGE SKY COVER           0.40
NUMBER OF DAYS FAIR           10
NUMBER OF DAYS PC             18
NUMBER OF DAYS CLOUDY          2

AVERAGE RH (PERCENT)     69

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              1     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       1
LIGHT RAIN                7     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      15     FOG W/VIS <= 1/4 MILE      2
HAZE                      1

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

$$

JAM




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