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Climatological Report (Annual)
Issued by NWS Grand Rapids, MI
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509
CXUS53 KGRR 030229
CLAGRR

CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS, MI
929 PM EST TUE JAN 2 2018

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

...THE GRAND RAPIDS MI (ASOS) CLIMATE SUMMARY FOR THE YEAR OF 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             108   07/13/1936
 LOW              -24   02/14/1899
                        02/13/1899
HIGHEST            96   09/23        93       3       93  06/18
LOWEST            -12   12/27        -6      -6        1  02/14
AVG. MAXIMUM     59.4              58.0     1.4     60.1
AVG. MINIMUM     41.2              40.3     0.9     42.3
MEAN             50.3              49.1     1.2     51.2
DAYS MAX >= 90     11               8.4     2.6       19
DAYS MAX <= 32     43              47.3    -4.3       45
DAYS MIN <= 32    112             126.5   -14.5      113
DAYS MIN <= 0       6               3.9     2.1        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        48.80   2008
 MINIMUM        20.99   1930
TOTALS          39.43             38.27    1.16    46.29
DAILY AVG.       0.11              0.10    0.01     0.13
DAYS >= .01       158             145.0    13.0      152
DAYS >= .10        86              77.5     8.5       93
DAYS >= .50        23              22.9     0.1       29
DAYS >= 1.00        7               7.7    -0.7       10
GREATEST
 24 HR. TOTAL    2.81   10/23 TO 10/23

SNOWFALL (INCHES)
RECORDS
 TOTAL          143.7   2008
 24 HR TOTAL     16.1   01/26/1978 TO 01/26/1978
 SNOW DEPTH        27   01/27/1978
TOTALS           55.8              74.9   -19.1     92.9
SINCE 7/1        33.5              29.2     4.3     37.8
SNOWDEPTH AVG.      0                MM      MM        1
DAYS >= TRACE      78              52.1    25.9       87
DAYS >= 1.0        20              23.0    -3.0       25
GREATEST
 SNOW DEPTH        10   12/16                         10  02/25
 24 HR TOTAL      7.0   12/25 TO 12/25

DEGREE_DAYS
HEATING TOTAL    5974              6485    -511     5866
 SINCE 7/1         MM              2449      MM       MM
COOLING TOTAL     719               698      21      936
 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              9.5
RESULTANT WIND SPEED/DIRECTION   3/243
HIGHEST WIND SPEED/DIRECTION    51/250    DATE  03/08
HIGHEST GUST SPEED/DIRECTION    64/240    DATE  03/08

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   49
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR           49
NUMBER OF DAYS PC            171
NUMBER OF DAYS CLOUDY        145

AVERAGE RH (PERCENT)     72

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             46     MIXED PRECIP               8
HEAVY RAIN               41     RAIN                      63
LIGHT RAIN              163     FREEZING RAIN              1
LT FREEZING RAIN          5     HAIL                       1
HEAVY SNOW                6     SNOW                      18
LIGHT SNOW               73     SLEET                      5
FOG                     200     FOG W/VIS <= 1/4 MILE     23
HAZE                     59

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

$$
National Weather Service Weather Forecast Office
