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

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CXUS53 KGRR 021539 RRA
CLSGRR

WRKCLMGRR 000
TTAA00 KGRR 011855


CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS, MI
1039 AM EST SAT DEC 2 2017...CORRECTED FOR THUNDERSTORM DAYS

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

...THE GRAND RAPIDS MI (ASOS) CLIMATE SUMMARY FOR THE SEASON, FROM
9/1/2017 TO 11/30/2017...

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              -10   11/25/1950
HIGHEST            96   09/23        87       9       90  09/06
LOWEST             17   11/10        16       1       21  11/22
AVG. MAXIMUM     63.1              60.2     2.9     64.4
AVG. MINIMUM     43.7              42.5     1.2     46.6
MEAN             53.4              51.3     2.1     55.5
DAYS MAX >= 90      6               0.3     5.7        1
DAYS MAX <= 32      1               1.8    -0.8        1
DAYS MIN <= 32     21              18.0     3.0        6
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        18.11   1911
 MINIMUM         2.59   1956
TOTALS          13.15             11.05    2.10    11.79
DAILY AVG.       0.14              0.12    0.02     0.13
DAYS >= .01        34              35.7    -1.7       30
DAYS >= .10        19              21.0    -2.0       21
DAYS >= .50         8               7.1     0.9        6
DAYS >= 1.00        4               2.3     1.7        4
GREATEST
 24 HR. TOTAL    2.81   10/23 TO 10/23

SNOWFALL (INCHES)
RECORDS
 TOTAL           31.0   2014
 24 HR TOTAL     10.4   11/03/1991 TO 11/03/1991
 SNOW DEPTH        11   11/21/2000
                        11/07/1951
TOTALS            0.6               7.3    -6.7      0.8
SINCE 7/1         0.6               7.3    -6.7      0.8
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= TRACE      11               4.7     6.3        3
DAYS >= 1.0         0               2.2    -2.2        0
GREATEST
 SNOW DEPTH         T   11/10                          T  11/20
 24 HR TOTAL      0.4   10/31 TO 10/31

DEGREE_DAYS
HEATING TOTAL    1175              1317    -142      948
 SINCE 7/1       1191              1338    -147      948
COOLING TOTAL     147                74      73      105
 SINCE 1/1        719               699      20      936

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

WIND (MPH)
AVERAGE WIND SPEED              8.7
RESULTANT WIND SPEED/DIRECTION   3/213
HIGHEST WIND SPEED/DIRECTION    31/280    DATE  11/28
HIGHEST GUST SPEED/DIRECTION    43/270    DATE  10/30

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   53
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR           14
NUMBER OF DAYS PC             44
NUMBER OF DAYS CLOUDY         33

AVERAGE RH (PERCENT)     74

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              6     MIXED PRECIP               3
HEAVY RAIN               12     RAIN                      14
LIGHT RAIN               44     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       1
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                8     SLEET                      3
FOG                      52     FOG W/VIS <= 1/4 MILE      3
HAZE                      4

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

$$

JAM



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