RSS FeedsIssued by NWS Detroit/Pontiac, MI
000
CXUS53 KDTX 022356
CLMDTW
CLIMATE REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
100 PM EST MON MAR 2 2009
...................................
...THE DETROIT CLIMATE SUMMARY FOR THE MONTH OF FEBRUARY 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 70 02/11/1999
LOW -20 02/09/1875
HIGHEST 59 02/10 MM MM
LOWEST -4 02/05 MM MM
AVG. MAXIMUM 36.4 34.4 2.0
AVG. MINIMUM 20.6 20.0 0.6
MEAN 28.5 27.2 1.3
DAYS MAX >= 90 0 0.0 0.0
DAYS MAX <= 32 11 12.9 -1.9
DAYS MIN <= 32 24 24.7 -0.7
DAYS MIN <= 0 1 2.0 -1.0
PRECIPITATION (INCHES)
RECORDS
MAXIMUM 6.41 1881
MINIMUM 0.04 1877
TOTALS 2.12 1.88 0.24
DAILY AVG. 0.08 0.07 0.01
DAYS >= .01 11 MM MM
DAYS >= .10 7 MM MM
DAYS >= .50 1 MM MM
DAYS >= 1.00 0 MM MM
GREATEST
24 HR. TOTAL 0.82 02/11 TO 02/11
02/10 TO 02/11
02/11 TO 02/11
STORM TOTAL MM
(MM/DD(HH)) MM
SNOWFALL (INCHES)
RECORDS
MAXIMUM 38.4 1908
MINIMUM T 1998
TOTAL 8.5 9.3 -0.8
LIQUID EQUIV 0.85 0.90 -0.05
SINCE 7/1 57.3 35.3 22.0
LIQUID 7/1 5.73
DAYS >= TRACE 15 7.9 7.1
DAYS >= 1.0 3 2.9 0.1
GREATEST
SNOW DEPTH 10R 02/01
24 HR TOTAL 3.2 MM
STORM TOTAL MM
(MM/DD(HH)) MM
DEGREE_DAYS
HEATING TOTAL 1014 1074 -60
SINCE 7/1 4886 4744 142
COOLING TOTAL 0 0 0
SINCE 1/1 0 0 0
FREEZE DATES
RECORD
EARLIEST MM
LATEST MM
EARLIEST MM
LATEST MM
.................................................
WIND (MPH)
AVERAGE WIND SPEED 9.7
HIGHEST WIND SPEED/DIRECTION 36/280 DATE 02/12
HIGHEST GUST SPEED/DIRECTION 51/290 DATE 02/12
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
NUMBER OF DAYS FAIR 1
NUMBER OF DAYS PC 12
NUMBER OF DAYS CLOUDY 15
AVERAGE RH (PERCENT) 70
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 6
LIGHT RAIN 8 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 1 SNOW 3
LIGHT SNOW 14 SLEET 1
FOG 16 FOG W/VIS <= 1/4 MILE 2
HAZE 17
- 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 - FEBRUARY 2009
...TEMPERATURE DATA... ...PRECIPITATION DATA...
AVERAGE MAXIMUM.... 34.7 MONTHLY TOTAL ........... 2.64
AVERAGE MINIMUM.... 16.2 GREATEST IN 24HRS........ 1.11
MONTHLY AVERAGE.... 25.5 ON THE 11-12TH
2009 TOTAL............... 4.24
...HEATING DEGREE DAYS... ...SNOWFALL DATA...
MONTHLY TOTAL.........1113 MONTHLY TOTAL............ 7.1
2008-09 SEASON TOTAL..5598 2008-09 SEASON TOTAL..... 77.6
...COOLING DEGREE DAYS...
MONTHLY TOTAL.......... 0
2009 TOTAL............. 0
==================================================================
CLIMATOLOGICAL SUMMARY FOR DETROIT - FEBRUARY 2009
...LAST OFFICIAL WINTER MONTH MODERATES IN BOTH TEMPERATURES AND SNOWFALL...
...RAPID SNOWMELT AND HEAVY RAINS INDUCE FLOODING ON LOCAL RIVERS...
***DOMINANT TEMPERATURE/SNOW TREND...ABOVE NORMAL/NORMAL***
THERE WAS A NOTABLE DIFFERENCE IN THE UPPER AND SURFACE WIND PATTERNS
OF FEBRUARY. THE ARCTIC AIR SURGES PREVALENT THE LAST FEW MONTHS
WERE CUT OFF AT TIMES AND MILDER AIR FLOODED THE REGION FROM THE
PACIFIC OR GULF REGION. THIS LED TO FEBRUARY BEING NOT ONLY A MORE
MODERATE MONTH BUT ALSO A MUCH MORE VARIABLE MONTH WITH SOME NOTABLE
WARM SNAPS AND CONTRASTING COLD SNAPS.
WHILE FEBRUARY STARTED OFF BRIEFLY MILD...ANOTHER SHOT OF BRUTAL
ARCTIC AIR SOON MADE ITS APPEARANCE BY THE END OF THE 2ND AND BY THE
MORNING OF THE 5TH...READINGS PLUNGED BELOW ZERO. OFFICIALLY AT
DETROIT METRO AIRPORT...THE TEMPERATURE FELL TO -4 ON THE 5TH BUT
MUCH COLDER VALUES WERE SEEN. WIDESPREAD READINGS OF -5 TO -15 WERE
DOCUMENTED THAT MORNING. SOME OF THE BITTER COLD READINGS WERE...-18
AT RICHMOND...-17 AT BLISSFIELD... -16 AT HOWELL... SALINE AND
MILFORD...-15 AT PORT HURON...MANCHESTER...CARLETON AND YES...
HELL...-14 HERE AT THE NWS WHITE LAKE AND YALE... -13 AT CHELSEA...
-10 AT CAPAC... ADRIAN AND MILAN.
A WELL DESERVED WARM UP FOLLOWED THIS PERIOD OF BITTER COLD AIR AS THE
JET STREAM SHIFTED TO A STRONG SOUTHWESTERLY FLOW WHILE DEVELOPING A
LARGE STORM CENTER OVER THE NORTHERN PLAINS. THIS STORM DREW VERY MILD
AIR FROM THE DEEP SOUTH NORTHWARD INTO THE LAKES. TEMPERATURES ROSE
STRONGLY INTO THE 40S ON THE 7-8TH...AND THEN WELL INTO THE MID TO
UPPER 50S BY 10TH AND 11TH. THE WARMTH BLEW AWAY AN OLD RECORD HIGH
ON THE 10TH WITH A HIGH OF 59 /OLD RECORD 56-1965/. ALONG WITH THE
WARMTH CAME FLOODING FROM RAPIDLY MELTING SNOW COVER AND HEAVY
RAINS. FLOOD WARNINGS WERE ISSUED FOR MANY RIVERS INCLUDING...RIVER
RAISIN AT MONROE AND BLISSFIELD...NORTH BRANCH OF THE CLINTON RIVER
AT MT CLEMENS...THE BLACK RIVER /ICE JAM/ AT PORT HURON AND ROUGE
RIVER IN DETROIT.
COLDER WEATHER ALONG WITH SNOW ARRIVED ON THE SCENE FOR VALENTINES DAY.
GENERALLY 2 TO 4 INCHES FELL WITH 3.2" AT DETROIT AND 2.8" AT WHITE
LAKE. AFTER TEMPERATURES GENERALLY AVERAGED AROUND NORMAL BUT BEGAN TO
LOSE GROUND AGAIN BY THE 23RD AND 24TH AS ANOTHER FAIRLY POTENT COLD
SNAP DROVE TEMPERATURES DOWN INTO THE SINGLE FIGURES. DETROIT METRO
FELL TO 8 ABOVE ON THE 24TH WHILE HERE AT THE NWS WHITE LAKE....TWO WAS
REGISTER ON THE 23RD AND ZERO ON THE 24TH. ANOTHER WARM-UP ENSUED AT
THE END OF THE MONTH WITH TEMPERATURES SURGING BACK UP INTO THE 40S AND
50S...ONLY TO BE SQUASHED ONE AGAIN AT THE TURN OF THE MONTH WITH A NEW
COLD SNAP FOR MARCH`S OPENING.
A FAIRLY ACTIVE STORM TRACK CONTINUED THROUGHOUT FEBRUARY WITH ABOVE
NORMAL PRECIPITATION AND AROUND NORMAL SNOWFALL DESPITE THE WARMER
TREND DOMINANCE. LOOK FOR A PRELIMINARY WINTER REVIEW (TEMPERATURES AND
SNOWFALL THUS FAR)AND SPRING OUTLOOK WITHIN THE NEXT WEEK ON LINE AT
OUR HOME PAGE WWW.WEATHER.GOV/DTX.
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A NEW ITEM IN OUR MONTHLY WRITE-UPS THAT I FEEL WILL GIVE A BETTER
IDEA TO THE MONTHS DOMINANT WEATHER TREND FOR BOTH TEMPERATURE AND
DOMINATE PRECIPITATION. THIS IS IN ADDITION TO THE TEMPERATURE AND
PRECIPITATION STATISTICS/DEPARTURES WHICH DON`T ALWAYS REFLECT OUR
DOMINANT MONTHLY WEATHER ACCURATELY. THEREFORE...ALONG WITH OUR
MONTHLY STATISTICS/DEPARTURE...TEMPERATURE AND PRECIPITATION TRENDS
WILL BE SIMPLY INCLUDED...AND REMEMBER THEY MAY NOT ALWAYS AGREE.
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DEEDLER
