000
CXUS53 KGRR 011348 CCA
CLMGRR

CLIMATE REPORT...CORRECTED
NATIONAL WEATHER SERVICE GRAND RAPIDS, MI
901 AM EDT FRI JUN 1 2012

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

...THE GRAND RAPIDS MI CLIMATE SUMMARY FOR THE MONTH OF MAY 2012...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1892 TO 2012

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            91   05/28        85       6       89  05/30
LOWEST             39   05/11        31       8       33  05/05
AVG. MAXIMUM     74.5              69.5     5.0     69.6
AVG. MINIMUM     51.8              47.8     4.0     50.5
MEAN             63.2              58.7     4.5     60.0
DAYS MAX >= 90      2               0.3     1.7        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               0.7    -0.7        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        10.01   2001
 MINIMUM         0.72   1936
TOTALS           2.72              3.98   -1.26     4.54
DAILY AVG.       0.09              0.13   -0.04     0.15
DAYS >= .01        16              11.2     4.8       15
DAYS >= .10         9               7.0     2.0        9
DAYS >= .50         0               2.3    -2.3        3
DAYS >= 1.00        0               0.9    -0.9        0
GREATEST
 24 HR. TOTAL    0.73   05/06 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              T                 T     0.0      0.0
 LIQUID EQUIV      MM                MM      MM     0.00
SINCE 7/1        51.2              74.9   -23.7     74.0
 LIQUID 7/1      5.12                MM      MM     7.40
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= TRACE       1               0.1     0.9        0
DAYS >= 1.0         0               0.0     0.0        0
GREATEST
 SNOW DEPTH         0   MM                             0  MM
 24 HR TOTAL        T   05/09 TO 05/09

DEGREE_DAYS
HEATING TOTAL     131               235    -104      204
 SINCE 7/1       5225              6440   -1215     6468
COOLING TOTAL      81                39      42       59
 SINCE 1/1        108                47      61       64

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

WIND (MPH)
AVERAGE WIND SPEED              8.5
RESULTANT WIND SPEED/DIRECTION   2/199
HIGHEST WIND SPEED/DIRECTION    36/250    DATE  05/02
HIGHEST GUST SPEED/DIRECTION    44/250    DATE  05/02

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   67
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR            8
NUMBER OF DAYS PC             12
NUMBER OF DAYS CLOUDY         11

AVERAGE RH (PERCENT)     63

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                4     RAIN                       6
LIGHT RAIN               17     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      16     FOG W/VIS <= 1/4 MILE      3
HAZE                      8

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

&&

THIS WAS THE 9TH WARMEST MAY ON RECORD FOR GRAND RAPIDS.

&&

MAY 2012 WAS CHARACTERIZED BY ABOVE NORMAL TEMPERATURES AND BELOW
NORMAL PRECIPITATION. THERE WERE ONLY A FEW STRONG TO SEVERE
THUNDERSTORM... HEAVY RAIN AND FLOODING EVENTS WHICH IS BELOW
NORMAL FOR THE MONTH OF MAY. THERE WERE NO TORNADOES IN MAY 2012.

TEMPERATURES AVERAGED ABOVE TO MUCH ABOVE NORMAL TO START THE MONTH
OF MAY. IN FACT... ON MAY 3RD TEMPERATURES AVERAGED UP TO TWENTY TO
TWENTY FIVE DEGREES ABOVE NORMAL. AFTER THAT TEMPERATURES AVERAGED
FAIRLY CLOSE TO NORMAL THROUGH MID MAY BEFORE RETURNING TO ABOVE TO
MUCH ABOVE NORMAL LEVELS DURING THE THIRD WEEK OF MAY AND FOR MOST
OF THE MEMORIAL DAY WEEKEND. TEMPERATURES RETURNED TO FAIRLY CLOSE
TO NORMAL FOR THE LAST FEW DAYS OF MAY.

AN UPPER LOW MOVING OVER A WARM FRONT THAT STRETCHED ACROSS NORTHERN
LOWER MICHIGAN SET THE STAGE FOR HEAVY RAINFALL AND FLOODING ON MAY
5TH.  TRAINING THUNDERSTORMS PRODUCED 5 TO 7 INCHES OF RAIN ACROSS
PORTIONS OF MASON AND LAKE COUNTIES INTO NORTHWESTERN OSCEOLA
COUNTY. THIS CAUSED SEVERAL ROADS ACROSS THOSE AREAS TO BE FLOODED
OR WASHED OUT. STRONG TO SEVERE STORMS DEVELOPED LATER IN THE DAY ON
THE FIFTH IN THE WARM HUMID AIRMASS WITH NUMEROUS REPORTS OF LARGE
HAIL. THE LARGEST REPORT WAS OF A TWO INCH DIAMETER HAIL IN JACKSON.

ISOLATED SEVERE THUNDERSTORMS ON THE EVENING OF MAY 15TH BLEW DOWN
SEVERAL TREES ACROSS PORTIONS OF MUSKEGON AND KENT COUNTIES.

SCATTERED THUNDERSTORMS DEVELOPED DURING THE EVENING HOURS OF MAY
28TH. THERE WERE SEVERAL REPORTS OF WIND DAMAGE. 20 TO 25 TREES CAME
DOWN IN NEWAYGO COUNTY JUST NORTH OF FREMONT. THERE WERE ALSO
REPORTS OF SEVERAL TREES DOWN ACROSS PORTIONS OF MUSKEGON AND CLARE
COUNTIES.

$$

63 LAURENS