RSS FeedsIssued by NWS Detroit/Pontiac, MI
000
CXUS53 KDTX 012133
CLMDTW
CLIMATE REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
500 PM EDT MON JUN 1 2009
...................................
...THE DETROIT CLIMATE SUMMARY FOR THE MONTH OF MAY 2009...
CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1870 TO 2009
WEATHER OBSERVED NORMAL DEPART
VALUE DATE(S) VALUE FROM
NORMAL
................................................
TEMPERATURE (F)
RECORD
HIGH 95 05/31/1895
LOW 25 05/10/1966
HIGHEST 83 05/21 MM MM
05/20
LOWEST 36 05/18 MM MM
AVG. MAXIMUM 69.9 70.2 -0.3
AVG. MINIMUM 49.0 49.4 -0.4
MEAN 59.4 59.8 -0.4
DAYS MAX >= 90 0 0.5 -0.5
DAYS MAX <= 32 0 0.0 0.0
DAYS MIN <= 32 0 0.5 -0.5
DAYS MIN <= 0 0 0.0 0.0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 8.46 2004
MINIMUM 0.43 1920
TOTALS 2.89 3.05 -0.16
DAILY AVG. 0.09 0.10 -0.01
DAYS >= .01 9 MM MM
DAYS >= .10 6 MM MM
DAYS >= .50 2 MM MM
DAYS >= 1.00 1 MM MM
GREATEST
24 HR. TOTAL 1.26 05/13 TO 05/14
STORM TOTAL MM
(MM/DD(HH)) MM
SNOWFALL (INCHES)
RECORDS
MAXIMUM 6.0 1923
24 HR TOTAL MM
TOTALS 0.0 T 0.0
LIQUID EQUIV 0.00 MM MM
SINCE 7/1 65.7 44.0 21.7
LIQUID 7/1 6.57
DAYS >= TRACE 0 0.0 0.0
DAYS >= 1.0 0 0.0 0.0
GREATEST
SNOW DEPTH 0 MM
24 HR TOTAL 0.0 05/31 TO 05/31
STORM TOTAL MM
(MM/DD(HH)) MM
DEGREE_DAYS
HEATING TOTAL 180 219 -39
SINCE 7/1 6343 6376 -33
COOLING TOTAL 12 42 -30
SINCE 1/1 32 48 -16
FREEZE DATES
RECORD
EARLIEST MM
LATEST MM
EARLIEST MM
LATEST MM
.................................................
WIND (MPH)
AVERAGE WIND SPEED 8.4
HIGHEST WIND SPEED/DIRECTION 35/250 DATE 05/09
HIGHEST GUST SPEED/DIRECTION 41/250 DATE 05/09
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
NUMBER OF DAYS FAIR 6
NUMBER OF DAYS PC 13
NUMBER OF DAYS CLOUDY 12
AVERAGE RH (PERCENT) 60
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 4 MIXED PRECIP 0
HEAVY RAIN 4 RAIN 7
LIGHT RAIN 14 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 2
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 11 FOG W/VIS <= 1/4 MILE 1
HAZE 7
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$
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CLIMATOLOGICAL STATISTICS FOR THE NWS WHITE LAKE - MAY 2009
...TEMPERATURE DATA... ...PRECIPITATION DATA...
AVERAGE MAXIMUM.... 67.7 MONTHLY TOTAL ........... 2.49
AVERAGE MINIMUM.... 46.0 GREATEST IN 24HRS........ 0.88
MONTHLY AVERAGE.... 56.9 ON THE 13-14TH
2009 TOTAL...............16.72
...HEATING DEGREE DAYS... ...SNOWFALL DATA...
MONTHLY TOTAL......... 271 MONTHLY TOTAL............ 0.0
2008-09 SEASON TOTAL..7365 2008-09 SEASON TOTAL..... 88.8
...COOLING DEGREE DAYS...
MONTHLY TOTAL.......... 12
2009 TOTAL............. 25
==================================================================
CLIMATOLOGICAL SUMMARY FOR DETROIT - MAY 2009
...A RATHER BENIGN MAY HAD ITS SHARE OF PLEASANT DAYS...
...A LITTLE ON THE COOL SIDE WITH LIMITED SEVERE WEATHER...
***DOMINANT TEMPERATURE/RAIN TREND...BELOW NORMAL/NORMAL***
AFTER SEVERAL MONTHS OF BUSY WEATHER...OF ONE SORT OR ANOTHER...
MAY CALMED DOWN CONSIDERABLY. ON THE POSITIVE...THERE WERE SEVERAL
PLEASANT DAYS WITH CONSIDERABLE SUNSHINE ALONG WITH COMFORTABLE...
RATHER LOW HUMIDITY LEVELS....SOMEWHAT UNUSUAL LATE IN THE SPRING. IN
ADDITION...LESS THAN A THIRD OF THE MONTH /9 DAYS/ HAD MEASURABLE RAIN.
AS MIGHT BE EXPECTED WITH THE ABOVE SCENARIO...MAY WAS A RATHER TEPID
MONTH SEVERE WEATHERWISE ALSO WITH JUST A COUPLE OF CASES...THE MOST
MEMORABLE COMING LATE IN THE MONTH ON THE 27TH. REPORTS OF HIGH WINDS
WITH TORRENTIAL DOWNPOURS ACCOMPANIED A FEW OF THE HEAVIEST STORMS.
THUNDERSTORM WIND GUSTS WERE ESTIMATED UP TO 55 MPH AT COMMERCE
TOWNSHIP.
THE MOST NOTABLE WEATHER TREND OF THE MONTH WAS THE COOL SNAP MID MONTH
WHEN TEMPERATURES AVERAGED BELOW NORMAL NEARLY EVERY DAY FROM THE 10TH
THROUGH THE 18TH /MINUS THE 14TH/. THE COLDEST MORNINGS CAME ON THE
17TH AND 18TH WHEN TEMPERATURES FELL INTO THE 30S INTO LOW 40S...LEAVING
DAILY AVERAGES AS MUCH AS 10 TO 15 DEGREES BELOW ZERO. POCKETS OF FROST
FORMED IN THE REGION WITH SOME AREAS ACTUALLY FALLING TO FREEZING OR
BELOW SUCH AS...ANN ARBOR 29...SALINE 31...SHELBY 32...HOWELL 30...
CAPAC 29 AND NWS WHITE LAKE AND YPSILANTI BOTH 30. RIGHT AFTER...A
BRIEF WARM UP CAME ON THE 20TH AND 21ST...BRINGING DOUBLE HIGHS OF 83
(THE ONLY EIGHTIES IN MAY AND...THE WARMEST DAYS THIS SEASON THUS FAR
WERE BACK IN APRIL). THE REMAINDER OF THE MONTH...TEMPERATURES ONCE
AGAIN FELL BACK INTO THE 60S AND 70S.
RAINFALL CAME IN SPURTS DURING THE MONTH WITH THE MAJORITY FALLING IN
SHOWERS AND THUNDERSTORMS FROM THE 13TH-16TH WHEN 1.67" WAS MEASURED AT
DETROIT METRO AIRPORT. RAINFALL FOR THE MONTH ACTUALLY FELL (NO PUN
INTENDED) JUST SHY OF THE NORMAL AFTER THE WELL ABOVE NORMAL RAINS OF
APRIL.
DEEDLER
