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Hampton Roads Obs/Disco


Martin

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flurries to four inches for the Hampton Roads.

Hard to argue with that :P Theres so much uncertainty with systems such as these.. something i find interesting is correlating this system to the rain we had last night.... i think that many of the areas that got rain from that coastal low, may see snow from this one, it looks nearly identical on the models as far as qpf, i might look into how much rain actually fell at ORF yesterday.

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Hard to argue with that :P Theres so much uncertainty with systems such as these.. something i find interesting is correlating this system to the rain we had last night.... i think that many of the areas that got rain from that coastal low, may see snow from this one, it looks nearly identical on the models as far as qpf, i might look into how much rain actually fell at ORF yesterday.

Orf got .20". Somewhat similar except that storm never had a real chance nor was ever proged to be. This one at least had some "bullish" guidance. Still think it will come out to be the gfs of about 4 days ago around .30-.50"

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Orf got .20". Somewhat similar except that storm never had a real chance nor was ever proged to be. This one at least had some "bullish" guidance. Still think it will come out to be the gfs of about 4 days ago around .30-.50"

I will take 3-5 inches and be more than happy.. that would definitely give me a snowday from college. :snowman: I really dont feel like going to microeconomics again this week ...

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WAVY in house model still keeps showing snow from RIC to ORF all night :lol:

NWS bumped the totals up a little bit on the Southside

http://www.erh.noaa.gov/er/akq/winter/totalsnow.png

Tonight: Snow likely, mainly after 1am. Cloudy, with a low around 30. Calm wind becoming north between 5 and 8 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.

Thursday: A chance of light snow, mainly before 10am. Cloudy through mid morning, then gradual clearing, with a high near 39. North wind between 8 and 13 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

.SHORT TERM /THURSDAY THROUGH FRIDAY/...

FOR THE MOST PART...MODELS CONTINUE TO COME IN DECENT ALIGNMENT

WITH RESPECT TO THE NEXT SYSTEM TRACKING OFF THE SERN AND MID ATLC

COAST LATE TODAY AND TONIGHT. THE ONE NOTABLE EXCEPTION IS THE NAM

CONTINUES TO SHOW A TIGHT MSTR (AND THUS QPF) GRADIENT N-S ALONG

AND N OF THE FGEN ZONE. LATEST (03Z) SREF AND 00Z ECMWF CAME IN

SIMILAR TO THE OPERATIONAL GFS...THUS HAVE BASED THE FCST USING AN

ENSEMBLE MEAN APPROACH WITH THESE 3 RUNS. WITH THE LATEST RUNS...

IT DOES APPEAR THAT THE AMPLIFIED/FARTHER NORTH TREND WITH THIS

SYSTEM HAS ENDED. AS PREVIOUSLY NOTED...ITS ALWAYS A CONCERN WHEN

SUCH ANOMALOUSLY COLD AIR PLUNGES SOUTH INTO THE SCNTRL US AND

GULF OF MEXICO REGION.

BASED ON THE LATEST STLT IR/WV LOOPS UPSTREAM ALONG WITH THE

LATEST SHORT TERM TRENDS...IT CONTINUES TO APPEAR THE MID/UPPER

LEVEL PATTERN REMAINS TOO CONFLUENT FOR COMPLETE PHASING OF THE

NRN AND SOUTHERN STREAM JET STREAKS/VORT LOBES. THIS WILL INHIBIT

THE RAPID INTENSIFICATION OF SFC LOW PRESSURE AS IT TRACKS NE FROM

THE GULF OF MEXICO...INSTEAD LEADING TO A FAST MOVING WAVE OF LOW

PRESSURE THAT DOES NOT DEEPEN SIGNIFICANTLY UNTIL IT REACHES WELL

OFF THE NC COAST AFTER 12Z THU. NEVERTHELESS...THE MODEL CONSISTENCY

OVER THE PAST COUPLE OF RUNS WARRANT A CONTINUATION OF THE WINTER

STORM WATCH FOR MOST OF NE NC.

GFS/NAM BOTH SHOW A PERIOD OF FAIRLY STRONG MID-UPR LVL Q-VECTOR

FORCING COINCIDING WITH LOW-MID LVL FRONTOGENESIS/LIFT UP THROUGH

THE -15 TO -20C LAYER BETWEEN ABOUT 06-13Z THU. MODEL CROSS

SECTIONS ALSO SHOW A LAYER OF NEGATIVE EPV ABOVE THE FRONTAL ZONE

ACROSS NERN NC BTWN 06-12Z...COINCIDING WITH THE GOOD Q-VECTOR

CONVERGENCE TO PRODUCE A BULLS EYE SWATH OF MAXIMUM QPV. AGAIN...

EXPECT THIS TO BE THE TIME OF MOST CONCERN. AS THIS SYSTEM IS A

FAST MOVER...AND WITH INITIALLY VERY DRY COLD AIR WED

EVENING...SOME OF THE INITIAL QPF WILL TEND TO BE WASTED INTO

COLUMN MOISTENING. THUS...THERE WILL TEND TO BE SHARP CUTOFF IN

THE ACCUMULATING SNOW ON THE NW/DRIER SIDE OF THE SYSTEM. SNOW

AMTS SHOULD GNLY RANGE FROM A TRACE TO A DUSTING FROM N AND W OF

RICHMOND...TO A SLIVER OF 1-2 INCHES INTO HAMPTON ROADS AND

2-3"/UP TO 4" DOWN ALONG THE ALBEMARLE SOUND. ONCE AGAIN DID NOT

INCLUDE HAMPTON ROADS IN THE WATCH DUE TO A FAIRLY SMALL CHC FOR

WRNG CRITERIA SNOW (WHICH IS AN AVERAGE OF 4" IN 12 HOURS FOR VA).

HOWEVER...EXPECT THAT LATER SHIFTS WILL LIKELY NEED TO ISSUE AN

ADSY FOR SOME OF FAR SE VA/HAMPTON ROADS...ESPECIALLY AS THE

TIMING COINCIDES WITH THE THU AM RUSH HOUR.

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