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

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CXUS53 KGRR 021903
CLMGRR

CXUS53 KGRR DDHHMM
CLMGRR

CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS, MI
1130 PM EDT MON JUN 1 2015

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

...THE GRAND RAPIDS MI CLIMATE SUMMARY FOR THE MONTH OF MAY 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              98   05/30/1895
 LOW               21   05/01/1903
HIGHEST            85   05/07        85       0       88  05/31
LOWEST             35   05/20        31       4       32  05/16
AVG. MAXIMUM     71.3              69.5     1.8     70.1
AVG. MINIMUM     50.5              47.8     2.7     48.6
MEAN             60.9              58.7     2.2     59.3
DAYS MAX >= 90      0               0.3    -0.3        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               0.7    -0.7        1
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        10.01   2001
 MINIMUM         0.72   1936
TOTALS           3.47              3.98   -0.51     3.31
DAILY AVG.       0.11              0.13   -0.02     0.11
DAYS >= .01        15              11.2     3.8       12
DAYS >= .10        10               7.0     3.0        9
DAYS >= .50         1               2.3    -1.3        1
DAYS >= 1.00        0               0.9    -0.9        1
GREATEST
 24 HR. TOTAL    0.51   05/30 TO 05/30           05/07 TO 05/07

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      0.0
SINCE 7/1        78.1              74.9     3.2    116.0
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= TRACE       0               0.1    -0.1        0
DAYS >= 1.0         0               0.0     0.0        0
GREATEST
 SNOW DEPTH         0   MM                             0  MM
 24 HR TOTAL      0.0   MM

DEGREE_DAYS
HEATING TOTAL     172               235     -63      219
 SINCE 7/1       6989              6440     549     7200
COOLING TOTAL      52                39      13       51
 SINCE 1/1         52                47       5       53

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

WIND (MPH)
AVERAGE WIND SPEED              9.6
RESULTANT WIND SPEED/DIRECTION   3/215
HIGHEST WIND SPEED/DIRECTION    31/240    DATE  05/25
HIGHEST GUST SPEED/DIRECTION    39/180    DATE  05/25

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   45
AVERAGE SKY COVER           0.70
NUMBER OF DAYS FAIR            5
NUMBER OF DAYS PC             15
NUMBER OF DAYS CLOUDY         11

AVERAGE RH (PERCENT)     69

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              4     MIXED PRECIP               0
HEAVY RAIN                6     RAIN                       9
LIGHT RAIN               19     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      18     FOG W/VIS <= 1/4 MILE      2
HAZE                      8

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

&&

MAY 2015 FEATURED TEMPERATURES WHICH AVERAGED OUT ABOVE NORMAL, A
DEPARTURE THAT INCREASED FROM WEST TO EAST. BY AND LARGE,
PRECIPITATION ALSO RAN ABOVE NORMAL WITH A SMALL AREA NEAR THE
SAGINAW BAY RUNNING SLIGHTLY BELOW NORMAL. GENERALLY, PRECIPITATION
DEPARTURES RAN SLIGHTLY ABOVE NORMAL THROUGH A THIN RIBBON OF
CENTRAL LOWER MICHIGAN AND WELL ABOVE NORMAL IN MUCH OF NORTHERN AND
SOUTHERN LOWER MICHIGAN. NO SNOWFALL WAS RECORDED IN MAY.

THE MONTH BROUGHT ON WHAT COULD HAVE ARGUABLY BEEN THE YEAR`S FIRST
SOMEWHAT SUSTAINABLE, MILD AIR MASS. TEMPERATURES GENERALLY RAN
SLIGHTLY ABOVE NORMAL TO WELL ABOVE NORMAL THROUGH THE FIRST WEEK. A
WARM FRONT RESULTED IN WELCOME RAINFALL MAY 4TH AND MAY 5TH, AS
EIGHTY-PLUS DEGREE TEMPERATURES FOLLOWED SUIT MAY 7TH. TEMPERATURES
AT THE TIME WERE MORE REPRESENTATIVE OF MID-JULY THAN EARLY MAY.

THE FIRST ROLLER COASTER RIDE IN TEMPERATURES CAME TOWARD THE END OF
THE SECOND WEEK OF MAY. A STORM SYSTEM WOULD APPROACH THE REGION AT
THE START OF THE SECOND WEEK, ACCOMPANIED BY A SHARP COLD FRONT. A
LARGE PART OF MAY 12TH WAS SPENT IN THE 40S, BEFORE TOPPING OUT NEAR
50 DEGREES, BUT THE RAPID FALL IN TEMPERATURES WAS BRIEF. THE GREAT
LAKES REGION SAW A GRADUAL RISE BACK INTO THE 70S BY MAY 15TH AND
INTO THE 80S BY MAY 17TH.

THE NORTHERN INFLUENCE MADE AN IMPACT ONCE MORE DURING THE END OF
THE THIRD WEEK. ANOTHER DOWNWARD SPIRAL IN TEMPERATURES WAS
EXPERIENCED ON MAY 19TH AND MAY 20TH. COOLER TEMPERATURES ONLY
LASTED A FEW DAYS. BY MEMORIAL DAY WEEKEND PLEASANT WEATHER RETURNED
TO THE AREA. MILD TEMPERATURES AND DRY WEATHER TOOK COMMAND.

AMPLE WARMTH AND MOISTURE RETURNED IN THE FOLLOWING WEEK PROVIDING
FOR WHAT WOULD BE MAY`S BEST SHOT AT THUNDERSTORMS. THOUGH SEVERE
WEATHER WAS HARD TO COME BY, MAY 26TH PROVIDED A COUPLE SIGHTINGS OF
A FAIRLY CONSISTENT WALL CLOUD NEAR BEAL CITY, MICHIGAN. ISOLATED
REPORTS OF TREE DAMAGE WERE ALSO RECEIVED IN NEWAYGO COUNTY, BUT
WIDESPREAD DAMAGE DID NOT OCCUR IN EITHER CASE. THE MONTH WAS
RELATIVELY QUIET IN REGARDS TO SEVERE WEATHER.

$$

63/JAM



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