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

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870
CXUS53 KGRR 011844 CCA
CLMGRR

CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS, MI
107 PM EDT THU JUN 1 2017

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

...THE GRAND RAPIDS MI (ASOS) CLIMATE SUMMARY FOR THE MONTH OF MAY 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              95   05/31/1934
 LOW               21   05/01/1903
HIGHEST            88   05/16        85       3       88  05/25
LOWEST             31   05/09        31       0       36  05/15
                        05/08
AVG. MAXIMUM     68.0              69.5    -1.5     71.6
AVG. MINIMUM     47.1              47.8    -0.7     49.3
MEAN             57.6              58.7    -1.1     60.4
DAYS MAX >= 90      0               0.3    -0.3        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      2               0.7     1.3        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        10.01   2001
 MINIMUM         0.72   1936
TOTALS           1.50              3.98   -2.48     3.01
DAILY AVG.       0.05              0.13   -0.08     0.10
DAYS >= .01        14              11.2     2.8       11
DAYS >= .10         5               7.0    -2.0        8
DAYS >= .50         0               2.3    -2.3        2
DAYS >= 1.00        0               0.9    -0.9        0
GREATEST
 24 HR. TOTAL    0.33   05/01 TO 05/01
                        05/20 TO 05/20

SNOWFALL (INCHES)
RECORDS
 TOTAL            5.5   1923
                        1902
 24 HR TOTAL      5.5   05/09/1923 TO 05/09/1923
                        05/10/1902 TO 05/10/1902
 SNOW DEPTH         T   MM
TOTALS            0.0                 T     0.0        T
SINCE 7/1        60.1              74.9   -14.8     61.1
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= TRACE       0               0.1    -0.1        2
DAYS >= 1.0         0               0.0     0.0        0
GREATEST
 SNOW DEPTH         0   MM                             0  MM
 24 HR TOTAL      0.0   05/31 TO 05/31

DEGREE_DAYS
HEATING TOTAL     247               235      12      206
 SINCE 7/1       5613              6440    -827     5596
COOLING TOTAL      25                39     -14       71
 SINCE 1/1         30                47     -17       71

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

WIND (MPH)
AVERAGE WIND SPEED              10.4
RESULTANT WIND SPEED/DIRECTION   2/267
HIGHEST WIND SPEED/DIRECTION    38/250    DATE  05/18
HIGHEST GUST SPEED/DIRECTION    47/250    DATE  05/18

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   60
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            6
NUMBER OF DAYS PC             16
NUMBER OF DAYS CLOUDY          9

AVERAGE RH (PERCENT)     67

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              6     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                       7
LIGHT RAIN               18     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      11     FOG W/VIS <= 1/4 MILE      0
HAZE                      0

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

&&

MAY 2017 ENDED UP WITH NEAR TO SLIGHTLY BELOW NORMAL TEMPERATURES ON
AVERAGE, DEPENDING ON LOCATION. FURTHER AWAY FROM LAKE MICHIGAN, THE
LANSING AREA ENDED UP EXACTLY NORMAL. CLOSER TO LAKE MICHIGAN AND
GRAND RAPIDS, SLIGHTLY BELOW NORMAL READINGS OCCURRED. WELL BELOW
NORMAL PRECIPITATION OCCURRED FOR MUSKEGON AND GRAND RAPIDS WITH
BELOW NORMAL PRECIPITATION FOR LANSING. NO SIGNIFICANT SEVERE
WEATHER OCCURRED DURING MAY, BUT MANY DAYS WERE WINDY.

THE FIRST THIRD OF THE MONTH STARTED OUT ON A COOL NOTE WITH MANY
BELOW NORMAL TEMPERATURES. FREEZING TEMPERATURES OCCURRED IN THE LOW
30S TO UPPER 20S OCCURRED ON MAY 8TH AND 9TH, RESULTING IN SOME
DAMAGE TO VULNERABLE CROPS. THE MIDDLE PORTION OF MAY WAS THE
WARMEST, PARTICULARLY ON THE 16TH AND 17TH WHEN HIGHS REACHED THE
MID TO UPPER 80S. MUSKEGON, GRAND RAPIDS, AND LANSING EXPERIENCED
THEIR WARMEST DAILY LOW TEMPERATURE ON RECORD FOR THE 17TH, WHEN
OVERNIGHT TEMPERATURES REMAINED IN THE UPPER 60S TO 70 DEGREES. A
COOL DOWN OCCURRED STARTING ON THE 19TH, THEN TEMPERATURES HELD NEAR
NORMAL FOR THE REMAINDER OF THE MONTH.

RAIN WAS LACKING FOR THE MONTH ESPECIALLY ALONG THE LAKESHORE REGION
NORTH OF HOLLAND AND WEST CENTRAL LOWER MICHIGAN IN GENERAL.
HOWEVER, CERTAIN AREAS RECEIVED HEAVIER RAINFALL FROM KALAMAZOO TO
JACKSON WITH DOUBLE OR TRIPLE THE AMOUNT OF RAIN THAT THE OTHER
REGIONS RECEIVED. THIS WAS A RESULT OF A MORE ACTIVE THUNDERSTORM
TRACK ACROSS THAT REGION.

WINDY CONDITIONS WERE FAIRLY COMMON DURING THE MONTH DUE TO THE
UPPER LEVEL WEATHER PATTERN AND SURFACE FRONT CONFIGURATIONS. MOST
LOCATIONS HAD WIND GUSTS OF 30 MPH OR GREATER FOR 10 OR MORE DAYS.
THE WINDIEST DAY FOR MANY PLACES WAS THE 18TH, WHEN WINDS GUSTED TO
44 MPH AT MUSKEGON, 47 MPH AT GRAND RAPIDS, AND 52 MPH AT LANSING.

$$

CAS/HOVING



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