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

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CXUS53 KGRR 011407
CLMGRR

CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS, MI
955 AM EDT SAT JUN 1 2013

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

...THE GRAND RAPIDS MI CLIMATE SUMMARY FOR THE MONTH OF MAY 2013...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1892 TO 2013

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            88   05/20        85       3       91  05/28
LOWEST             29   05/13        31      -2       39  05/11
AVG. MAXIMUM     73.6              69.5     4.1     74.5
AVG. MINIMUM     51.4              47.8     3.6     51.8
MEAN             62.5              58.7     3.8     63.2
DAYS MAX >= 90      0               0.3    -0.3        2
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      1               0.7     0.3        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        10.01   2001
 MINIMUM         0.72   1936
TOTALS           3.59              3.98   -0.39     2.72
DAILY AVG.       0.12              0.13   -0.01     0.09
DAYS >= .01        14              11.2     2.8       16
DAYS >= .10         8               7.0     1.0        9
DAYS >= .50         2               2.3    -0.3        0
DAYS >= 1.00        1               0.9     0.1        0
GREATEST
 24 HR. TOTAL    1.53   05/28 TO 05/29

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              T                 T     0.0        T
SINCE 7/1        66.0              74.9    -8.9     51.2
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= TRACE       1               0.1     0.9        1
DAYS >= 1.0         0               0.0     0.0        0
GREATEST
 SNOW DEPTH         0   MM                             0  MM
 24 HR TOTAL        T   05/20 TO 05/20

DEGREE_DAYS
HEATING TOTAL     149               235     -86      131
 SINCE 7/1       6271              6440    -169     5225
COOLING TOTAL      79                39      40       81
 SINCE 1/1         82                47      35      108

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

WIND (MPH)
AVERAGE WIND SPEED              8.2
RESULTANT WIND SPEED/DIRECTION   2/156
HIGHEST WIND SPEED/DIRECTION    35/260    DATE  05/21
HIGHEST GUST SPEED/DIRECTION    43/200    DATE  05/31

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   63
AVERAGE SKY COVER           0.60

AVERAGE RH (PERCENT)     61

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              5     MIXED PRECIP               0
HEAVY RAIN                5     RAIN                       8
LIGHT RAIN               15     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       1
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       8     FOG W/VIS <= 1/4 MILE      1
HAZE                      9

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

&&

AFTER THREE CONSECUTIVE MONTHS OF WELL BELOW NORMAL
TEMPERATURES...MAY 2013 SAW WELL ABOVE NORMAL TEMPERATURES RETURN TO
SOUTHWEST LOWER MICHIGAN. PRECIPITATION WAS ALSO ABOVE NORMAL IN
MAY.

THE MAY AVERAGE TEMPERATURE WAS AROUND 4 DEGREES ABOVE NORMAL ACROSS
WEST MICHIGAN...BRINGING SOME MUCH WELCOMED WARMTH. WE STARTED OUT
VERY WARM...WITH THE FIRST NINE DAYS OF THE MONTH ALL SEEING WELL
ABOVE NORMAL TEMPERATURES. A STOUT COLD FRONT THEN SWEPT THROUGH AND
TEMPERATURES WERE COOLER THAN NORMAL FOR A FOUR DAY PERIOD. THE WARM
AIR RETURNED QUICKLY HOWEVER...TEMPERATURES WERE ABOVE NORMAL FOR
ANOTHER NINE DAYS BEFORE COOLER AIR INFILTRATED AGAIN JUST PRIOR TO
MEMORIAL DAY WEEKEND. THIS COOL SHOT WAS ALSO SHORT-LIVED AND THE
LAST FEW DAYS OF THE MONTH WERE QUITE WARM AND MUGGY WITH
THUNDERSTORMS IMPACTING THE REGION.

PRECIPITATION WAS SLIGHTLY ABOVE NORMAL FOR MOST LOCATIONS DURING
MAY IN WEST MICHIGAN. THE FIRST WEEK OF MAY WAS ALMOST ENTIRELY
DRY...PROVIDING RELIEF FOR THE FLOODING RECOVERY PROCESS AFTER
TORRENTIAL RAINFALL IN APRIL. THE FINAL FLOOD ADVISORY FROM THE
RECORD FLOODING EVENT WAS CANCELLED ON THE 7TH OF MAY. THERE WERE A
FEW DAYS OF MEASURABLE PRECIPITATION DURING THE SECOND WEEK OF MAY
BEFORE CONDITIONS DRIED OUT AGAIN. A CHUNK OF THE MONTHLY
PRECIPITATION OCCURRED FROM MAY 20-23 WITH MANY LOCATIONS RECEIVING
1 TO 3 INCHES OF RAINFALL. THE MONTH CONCLUDED IN A QUITE
MOIST...STORMY WEATHER PATTERN WITH MOST LOCATIONS RECEIVING
SIGNIFICANT RAINFALL FROM MAY 27-31.

THE SEVERE WEATHER SEASON FINALLY STARTED UP DURING MAY ACROSS THE
AREA. GENERAL THUNDERSTORMS ON MAY 10TH AND 11TH PRODUCED SOME
NON-SEVERE WIND GUSTS AND PEA-SIZE HAIL. THUNDERSTORMS THAT ROLLED
THROUGH ON MAY 20TH DOWNED TREES AND POWER LINES AND PRODUCED MARBLE
TO QUARTER-SIZE HAIL. ADDITIONAL ROUNDS OF STRONG TO SEVERE STORMS
IMPACTED SOUTHWEST LOWER MICHIGAN DURING THE FINAL WEEK OF THE
MONTH. A SEVERE THUNDERSTORM PRODUCED EF-0 WIND DAMAGE AT MPC
CASHWAY LUMBERYARD ABOUT 6 MILES WNW OF LANSING IN CLINTON COUNTY. A
SEMI TRUCK WAS ALSO ROLLED OVER AT THE SITE. PENNY TO NICKEL-SIZE
HAIL FELL ON THE 30TH. ALSO ON THE 30TH...THERE WERE SEVERAL STRONG
WIND GUSTS WITH SOME ASSOCIATED TREE DAMAGE. THE MOST SIGNIFICANT
DAMAGE OF THE DAY WAS DONE TO TWO BARNS IN CLINTON COUNTY. WINDS
WERE ESTIMATED AT 70 MPH BY LOCAL EMERGENCY MANAGEMENT.

$$

EBW









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