RSS FeedsIssued by NWS Detroit/Pontiac, MI
000
CXUS53 KDTX 012200
CLMDTW
CLIMATE REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
545 PM EDT THU OCT 1 2009
...................................
...THE DETROIT MI CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2009...
CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1874 TO 2009
WEATHER OBSERVED NORMAL DEPART
VALUE DATE(S) VALUE FROM
NORMAL
................................................
TEMPERATURE (F)
RECORD
HIGH 100 09/03/1953
09/02/1953
09/15/1939
LOW 29 09/23/1974
HIGHEST 85 09/14 MM MM
LOWEST 42 09/30 MM MM
AVG. MAXIMUM 75.5 73.7 1.8
AVG. MINIMUM 56.6 54.1 2.5
MEAN 66.0 63.9 2.1
DAYS MAX >= 90 0 0.8 -0.8
DAYS MAX <= 32 0 0.0 0.0
DAYS MIN <= 32 0 0.1 -0.1
DAYS MIN <= 0 0 0.0 0.0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 7.52 1986
MINIMUM 0.39 1877
TOTALS 1.46 3.27 -1.81
DAILY AVG. 0.05 0.11 -0.06
DAYS >= .01 5 MM MM
DAYS >= .10 3 MM MM
DAYS >= .50 1 MM MM
DAYS >= 1.00 0 MM MM
GREATEST
24 HR. TOTAL 0.55 09/07 TO 09/08
STORM TOTAL MM
(MM/DD(HHS)) MM
SNOWFALL (INCHES)
RECORDS
TOTAL 0.0 0
0
0
TOTALS 0.0 0.0 0.0
LIQUID EQUIV 0.00 0.00 0.00
SINCE 7/1 0.0 0.0 0.0
LIQUID 7/1 0.00
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 09/30 TO 09/30
STORM TOTAL MM
(MM/DD(HHS)) MM
DEGREE_DAYS
HEATING TOTAL 54 121 -67
SINCE 7/1 73 133 -60
COOLING TOTAL 92 75 17
SINCE 1/1 597 730 -133
FREEZE DATES
RECORD
EARLIEST MM
LATEST MM
EARLIEST MM
LATEST MM
.................................................
WIND (MPH)
AVERAGE WIND SPEED 6.3
HIGHEST WIND SPEED/DIRECTION 31/240 DATE 09/28
HIGHEST GUST SPEED/DIRECTION 39/240 DATE 09/28
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
NUMBER OF DAYS FAIR 6
NUMBER OF DAYS PC 14
NUMBER OF DAYS CLOUDY 10
AVERAGE RH (PERCENT) 71
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 1 MIXED PRECIP 0
HEAVY RAIN 3 RAIN 4
LIGHT RAIN 10 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 1
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 23 FOG W/VIS <= 1/4 MILE 0
HAZE 21
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
&&
---------------------------------------------------------------
CLIMATOLOGICAL STATISTICS FOR THE NWS WHITE LAKE - SEPTEMBER 2009
...TEMPERATURE DATA... ...PRECIPITATION DATA...
AVERAGE MAXIMUM.... 72.2 MONTHLY TOTAL ........... 1.55
AVERAGE MINIMUM.... 50.1 GREATEST IN 24HRS........ 0.58
MONTHLY AVERAGE.... 61.2 ON THE 28-29TH
2009 TOTAL...............27.81
...HEATING DEGREE DAYS... ...SNOWFALL DATA...
MONTHLY TOTAL......... 151 MONTHLY TOTAL.......... 0.0
2008-09 SEASON TOTAL.. 258 2009-10 SEASON TOTAL... 0.0
...COOLING DEGREE DAYS...
MONTHLY TOTAL.......... 34
2009 TOTAL.............306
==================================================================
CLIMATOLOGICAL SUMMARY FOR DETROIT - SEPTEMBER 2009
...A RELATIVELY WARM...NICE AND DRY SEPTEMBER BEGINS AUTUMN 2009...
***DOMINANT TEMPERATURE/RAIN TREND...ABOVE NORMAL/BELOW NORMAL***
IF MOTHER NATURE WAS TRYING TO MAKE UP FOR THE UNUSUALLY COOL (AND
IN PLACES WET) SUMMER...THEN SEPTEMBER`S WEATHER WAS A GOOD START.
WHILE TEMPERATURES THE FIRST FEW DAYS AND LAST FEW DAYS OF SEPTEMBER
AVERAGED BELOW NORMAL...MUCH OF THE REMAINDER OF THE MONTH SAW READINGS
AVERAGING ABOVE THE NORMAL. VERY LITTLE RAINFALL OCCURRED THE FIRST TWO
THIRDS OF THE MONTH. OFFICIALLY...ONLY AROUND A HALF INCH /.55"/ OF
RAIN FELL ON THE 7-8TH BUT OTHER THAN THAT...NO MEASURABLE RAIN
OCCURRED THROUGH THE 20TH. THE WARMEST TEMPERATURES OF THE MONTH
NATURALLY OCCURRED DURING THE FIRST HALF OF THE MONTH...ESPECIALLY FROM
THE 13TH THROUGH THE 15TH WHEN READINGS POPPED INTO THE LOWER TO MID
80S (85 ON THE 14TH WAS THE MONTHS HIGH).
THE LATTER THIRD OF THE MONTH BECAME WETTER BUT REMAINED PRIMARILY WARM
UNTIL...AS MENTIONED...THE LAST COUPLE OF DAYS. A MINI WARM-UP STARTED
UP NEAR THE FALL EQUINOX AND CARRIED THROUGH THE 24TH WITH A PAIR OF
80`S RECORDED /22ND AND 23RD/. AT THE MONTH`S CLOSE...THE MONTHLY
TEMPERATURE AVERAGED RIGHT ON 66 DEGREES WHICH WAS A SOLID TWO DEGREES
/2.1/ ABOVE NORMAL (AND NOT FAR FROM THE SOUTHEAST LOWER MICHIGAN
SUMMER AVERAGE OF 67.2 DEGREES). TOTAL RAINFALL FOR THE MONTH STILL
FELL WELL SHORT OF AVERAGE WITH ONLY 1.46" OUT OF THE NORMAL 3.27"
/-1.81"/ NORMAL FALLING. WHILE BOTH FLINT AND SAGINAW MADE TENTH DRIEST
SEPTEMBER ON RECORD... DETROIT HAD JUST A BIT TOO MUCH RAINFALL AND
MISSED OUT WITH 1.33" BEING THE 20TH DRIEST.
A SHARP COLD FRONT SLICED THROUGH THE REGION LATE IN THE MONTH /28TH/
AND BROUGHT MUCH COLDER WEATHER (REMINDING US WHAT SEASON HAD JUST
STARTED). SCATTERED EARLY MORNING THUNDERSTORMS ACCOMPANIED THE FRONT AND
THEN LATER...STRONG NORTHWEST WINDS...HEAVY SHOWERS AND SOME SMALL HAIL
FOLLOWED WITH THE COLDER AIR IN PLACE. DETROIT METRO RECORDED A 39 MPH
GUST /28TH/ WHILE WINDS GUSTS OF 40-50 MPH WERE REPORTED OVER THE
SOUTHERN LAKES. THIS FRESH BLAST OF COLD AIR BROUGHT THE FIRST TRUE
AUTUMN FEEL TO THE AIR BY THE 30TH WITH HIGHS ONLY RISING INTO THE 50S.
DEEDLER
