Issued by NWS Grand Rapids, MI
000
CXUS53 KGRR 011537
CLMGRR
CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS, MI
1135 AM EDT SAT AUG 1 2009
...................................
...THE GRAND RAPIDS MI CLIMATE SUMMARY FOR THE MONTH OF JULY 2009...
CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1892 TO 2009
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
................................................................
TEMPERATURE (F)
RECORD
HIGH 108 07/13/1936
LOW 41 07/06/1983
HIGHEST 84 07/27 93 -9 89 07/17
07/16
LOWEST 50 07/14 48 2 50 07/01
07/13
07/08
AVG. MAXIMUM 76.9 82.3 -5.4 82.1
AVG. MINIMUM 57.3 60.5 -3.2 62.2
MEAN 67.1R 71.4 -4.3 72.1
DAYS MAX >= 90 0 4.3 -4.3 0
DAYS MAX <= 32 0 0.0 0.0 0
DAYS MIN <= 32 0 0.0 0.0 0
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 8.83 1992
MINIMUM 0.25 1894
TOTALS 2.35 3.56 -1.21 5.42
DAILY AVG. 0.08 0.11 -0.03 0.17
DAYS >= .01 6 9.4 -3.4 9
DAYS >= .10 3 6.1 -3.1 7
DAYS >= .50 1 2.7 -1.7 2
DAYS >= 1.00 1 0.8 0.2 1
GREATEST
24 HR. TOTAL 1.35 07/11 TO 07/11 07/01 TO 07/02
07/02 TO 07/02
07/02 TO 07/03
SNOWFALL (INCHES)
RECORDS
TOTAL T 1990
24 HR TOTAL T MM
SNOW DEPTH T MM
TOTALS 0.0 0.0 0.0 0.0
LIQUID EQUIV 0.00 0.00 0.00 0.00
SINCE 7/1 0.0 0.0 0.0 0.0
LIQUID 7/1 0.00 0.00 0.00 0.00
SNOWDEPTH AVG. 0 0 0 0
DAYS >= TRACE 0 0.0 0.0 0
DAYS >= 1.0 0 0.0 0.0 0
GREATEST
SNOW DEPTH 0 MM 0 MM
24 HR TOTAL 0.0 07/31 TO 07/31 07/31 TO 07/31
07/02 TO 07/02
07/03 TO 07/03
DEGREE_DAYS
HEATING TOTAL 25 10 15 1
SINCE 7/1 25 10 15 1
COOLING TOTAL 97 217 -120 229
SINCE 1/1 248 387 -139 383
FREEZE DATES
RECORD
EARLIEST 09/03/1946
LATEST 06/04/1945
EARLIEST 10/13
LATEST 05/02
.................................................................
WIND (MPH)
AVERAGE WIND SPEED 7.3
RESULTANT WIND SPEED/DIRECTION 4/266
HIGHEST WIND SPEED/DIRECTION 24/270 DATE 07/26
HIGHEST GUST SPEED/DIRECTION 35/300 DATE 07/07
SKY COVER
POSSIBLE SUNSHINE (PERCENT) 64
NUMBER OF DAYS FAIR 7
NUMBER OF DAYS PC 22
NUMBER OF DAYS CLOUDY 2
AVERAGE RH (PERCENT) 67
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 6 MIXED PRECIP 0
HEAVY RAIN 3 RAIN 2
LIGHT RAIN 8 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 11
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
&&
THE MONTH OF JULY 2009 WILL BE MOST REMEMBERED FOR THE LACK OF ANY
HOT WEATHER DURING ANY PART OF THE MONTH. IT WAS THE COLDEST JULY
SINCE 1996 FOR MOST OF SOUTHWEST MICHIGAN. IN MANY LOCATIONS IT WAS
NEARLY AS COLD AS JULY OF 1992... WHICH FOR MOST LOCATIONS IS THE
COLDEST JULY IN THE PAST 50 YEARS. GRAND RAPIDS SET A RECORD FOR THE
COLDEST JULY EVER WITH A MEAN TEMPERATURE OF 67.1 DEGREES. THE
NUMBER OF DAYS WITH HIGHS OF 80 DEGREES OR WARMER WAS NEAR HALF OF
NORMAL. EVEN THE NUMBER OF SEVERE WEATHER EPISODES...ONE ON JULY
11TH... WAS ONLY TWENTY FIVE PERCENT OF THE 2000 TO 2008 AVERAGE OF
FOUR SEVERE EPISODES. FOR THE MOST PART PRECIPITATION WAS WELL BELOW
NORMAL ACROSS THE AREA.
THE MONTH STARTED OUT ON THE CHILLY SIDE FOR JULY STANDARDS...HIGHS
WERE IN THE MID 60S DURING THE FIRST TWO DAYS OF THE MONTH.
TEMPERATURES DID WARM TO HIGHS NEAR 80 BY THE 5TH AND 6TH. EVEN SO
THE DAILY MEAN TEMPERATURE REMAINED BELOW NORMAL UNTIL THE 10TH WHEN
IT WARMED TO NORMAL DUE TO WARMER LOW TEMPERATURES DURING THAT TIME.
THERE WAS HEAVY RAIN AND SEVERE THUNDERSTORMS WITH THE COLD FRONT
EARLY IN THE MORNING ON THE 11TH. THOSE STORMS DID CONSIDERABLE
DAMAGE TO TREES FROM PARTS OF EASTERN ALLEGAN COUNTY INTO BARRY
COUNTY. OVER 100 TREES WERE REPORTED TO HAVE BEEN BLOWN DOWN.
THEN ANOTHER LONG AND COOL STRETCH SET IN AND TEMPERATURES WERE
AROUND 5 DEGREES BELOW NORMAL UNTIL ANOTHER BRIEF WARM UP ON THE 15TH
WHEN ANOTHER FRONTAL SYSTEM BROUGHT MORE THUNDERSTORMS TO THE AREA.
TEMPERATURES ONLY GOT TO NORMAL ONCE AGAIN. A STRONG PUSH OF COLD
AIR FOLLOWED THAT WITH TEMPERATURES BEING AROUND 10 DEGREES BELOW
NORMAL FROM THE 17TH THROUGH THE 20TH. FROM THE 21ST THROUGH 31ST
TEMPERATURES RANGED FROM NORMAL TO FIVE DEGREES BELOW NORMAL FOR THE
MOST PART.
TWO WATER SPOUTS WERE REPORTED NEAR TUNNEL PARK IN HOLLAND ON THE
19TH. SOME VERY HEAVY RAINFALL OCCURRED DURING THIS TIME PERIOD AS
WELL. ON THE 21ST...HEAVY RAINFALL OCCURRED OVER EASTERN OTTAWA
COUNTY NORTH OF JENISON. DURING THE EVENING ON THE 22ND...RAINFALL
OF OVER AN INCH OCCURRED IN LESS THAN TWO HOURS.
FOUR CONSTRUCTION WORKERS WORKING AT FERRIS STATE UNIVERSITY WERE
INJURED WHEN SOME PINE TREES CLOSE TO WHERE THEY WERE STANDING WERE
STRUCK BY LIGHTNING AT ABOUT 945 AM AS THUNDERSTORMS MOVED THROUGH
THAT AREA. THUNDERSTORMS DURING THE LATE AFTERNOON AND EVENING
RESULTED IN MANY LOCATIONS HAVING BETWEEN ONE AND TWO INCHES OF RAIN
IN LESS THAN FOUR HOURS. SOME FLOODING WAS REPORTED IN SOUTHERN KENT
COUNTY WHERE UP TO TWO AND A QUARTER INCHES OF RAINFALL FELL.
$$
WDM/HOVING
