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

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CXUS53 KGRR 011850 CCA
CLMGRR

CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS, MI
212 PM EDT FRI MAY 1 2015

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

...THE GRAND RAPIDS MI CLIMATE SUMMARY FOR THE MONTH OF APRIL 2015...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1892 TO 2015

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              90   04/29/1899
 LOW                3   04/07/1982
HIGHEST            75   04/17        79      -4       78  04/21
LOWEST             22   04/04        21       1       22  04/16
AVG. MAXIMUM     59.4              58.2     1.2     59.0
AVG. MINIMUM     36.0              37.7    -1.7     36.2
MEAN             47.7              48.0    -0.3     47.6
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      0               0.3    -0.3        0
DAYS MIN <= 32      7               8.6    -1.6        9
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        11.10   2013
 MINIMUM         0.39   1942
TOTALS           4.07              3.35    0.72     2.62
DAILY AVG.       0.14              0.11    0.03     0.09
DAYS >= .01        10              12.7    -2.7       12
DAYS >= .10         7               7.3    -0.3        8
DAYS >= .50         2               1.9     0.1        2
DAYS >= 1.00        1               0.6     0.4        0
GREATEST
 24 HR. TOTAL    2.44   04/09 TO 04/10

SNOWFALL (INCHES)
RECORDS
 TOTAL           15.6   1961
 24 HR TOTAL      9.8   04/02/1975 TO 04/03/1975
 SNOW DEPTH        10   04/03/1975
TOTALS            0.1               1.8    -1.7      1.8
SINCE 7/1        78.1              74.9     3.2    116.0
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= TRACE       4               2.0     2.0        4
DAYS >= 1.0         0               0.5    -0.5        1
GREATEST
 SNOW DEPTH         0   MM                             2  04/15
 24 HR TOTAL      0.1   04/22 TO 04/22                MM

DEGREE_DAYS
HEATING TOTAL     511               518      -7      517
 SINCE 7/1       6817              6205     612     6981
COOLING TOTAL       0                 7      -7        2
 SINCE 1/1          0                 8      -8        2

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

WIND (MPH)
AVERAGE WIND SPEED              10.7
RESULTANT WIND SPEED/DIRECTION   1/289
HIGHEST WIND SPEED/DIRECTION    40/240    DATE  04/10
HIGHEST GUST SPEED/DIRECTION    50/240    DATE  04/10

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   55
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            7
NUMBER OF DAYS PC             13
NUMBER OF DAYS CLOUDY         10

AVERAGE RH (PERCENT)     62

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              4     MIXED PRECIP               1
HEAVY RAIN                2     RAIN                       6
LIGHT RAIN               14     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       1
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                3     SLEET                      0
FOG                      12     FOG W/VIS <= 1/4 MILE      0
HAZE                      7

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

&&

APRIL 2015 FEATURED TEMPERATURES WHICH AVERAGED OUT TO NEAR NORMAL.
PRECIPITATION WAS ABOVE NORMAL IN PORTIONS OF CENTRAL AND WESTERN
LOWER MICHIGAN... AND NEAR TO BELOW NORMAL IN SOUTHERN LOWER
MICHIGAN. SNOWFALL WAS BELOW NORMAL... TOTALING ABOUT 2 INCHES IN
PARTS OF CENTRAL MICHIGAN... AND LIGHT ACCUMULATIONS OR A TRACE NEAR
AND SOUTH OF MUSKEGON... GRAND RAPIDS... AND LANSING.

THE FIRST 20 DAYS OF APRIL WERE GENERALLY NEAR TO SOMEWHAT ABOVE
NORMAL... WITH A MIXTURE OF WARM AND COOL DAYS. A BAND OF
ACCUMULATING SNOW OCCURRED IN CENTRAL MICHIGAN THE MORNING OF APRIL
5. THE FIRST SEVERE THUNDERSTORM EVENT OF THE YEAR THEN FOLLOWED ON
APRIL 9... WHEN A STRONG LOW PRESSURE SYSTEM IN THE MIDWEST SPAWNED
TORNADOES IN ILLINOIS AND A LINE OF THUNDERSTORMS WITH SPORADIC WIND
GUSTS IN WEST MICHIGAN. ESTIMATED 70 TO 80 MPH GUSTS DESTROYED A
METAL STORAGE BUILDING IN DOWNTOWN MUSKEGON AND A STORAGE BARN NORTH
OF SPARTA. A NUMBER OF TREES FELL IN MUSKEGON... NEWAYGO... AND
MONTCALM COUNTIES FROM ISOLATED STRONG WIND GUSTS. DAILY RAINFALL
RECORDS WERE SET AT GRAND RAPIDS AND MUSKEGON AS 2 TO 4 INCHES OF
RAIN FELL IN THE AREA BETWEEN GRAND RAPIDS AND PENTWATER... CAUSING
MINOR RIVER AND LOWLAND FLOODING. MANY LOCATIONS THEN EXPERIENCED
THEIR FIRST 70 DEGREE DAY OF THE YEAR IN MID-APRIL.

A SHOT OF COLD AIR ENVELOPED THE GREAT LAKES FOR A FEW DAYS AFTER
APRIL 20. LANSING TIED A RECORD COLD HIGH TEMPERATURE OF 39 DEGREES
ON APRIL 22... AND GRAND RAPIDS SET A RECORD COLD LOW TEMPERATURE OF
25 DEGREES ON APRIL 24. SHOWERS CONTAINING RAIN... SNOW... OR
GRAUPEL PROVIDED SOME LOCATIONS WITH MINOR ACCUMULATIONS OF FROZEN
PRECIPITATION DURING THIS PERIOD. THE WEATHER SETTLED DOWN AND
TEMPERATURES MODERATED CLOSER TO NORMAL FOR THE FINAL SEVERAL DAYS
OF THE MONTH.

$$

CAS





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