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SW/Central/SE VA Winter 2012-13 Thread


MidlothianWX

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And WAVY goes the conservative route still. I find it sort of comical really (not saying they won't be right), but they seem fairly convinced that because their piece of crap futuretrak model says changeover won't happen til midnight and that it won't be all snow, that we're getting nothing over most of the state...

 

All I can think is, when has futuretrak ever been right? I mean, it showed virtually nothing before 12-26-04, 1-30-10, and 12-26-10. And we all know how those turned out...

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AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE WAKEFIELD VA
354 PM EST WED JAN 16 2013

.SYNOPSIS...
A LOW PRESSURE SYSTEM WILL REMAIN OVER THE SOUTHEAST WITH A
STATIONARY BOUNDARY EXTENDING INTO NORTH CAROLINA. THE LOW WILL
INTENSIFY AND TRACK ACROSS NORTH CAROLINA THURSDAY AFTERNOON
RESULTING IN WINTER CONDITIONS ACROSS THE MID ATLANTIC. COLD HIGH
PRESSURE BRINGS DRIER CONDITIONS FRIDAY INTO THE WEEKEND.

&&

.NEAR TERM /UNTIL 6 AM THURSDAY MORNING/...
LATEST WATER VAPOR IMAGERY PLACES PRONOUNCED POSITIVE TILT UPPER
TROUGH FROM THE GREAT LAKES REGION SW INTO THE SRN PLAINS WITH
HIGH PRESSURE LOCATED OFF THE SE COAST. DEEP SWLY FLOW IN RESPONSE
TO THESE FEATURES WILL CONTINUE TO ADVECT DEEP MOISTURE INTO THE
REGION. AT THE SFC...FRONTAL BOUNDARY STILL LOCATED OVER NC WITH
CAD WEDGE FIRMLY IN PLACE OVER THE FA. HAVE SEEN LITTLE RECOVERY
IN TEMPS TODAY AS TEMPS REMAIN IN THE LOW 40S ACROSS THE
FA...EXCEPT FOR THE UPPER 40S IN NE NC. OF INTEREST...THE TEMP AS
OF 3PM IN NEW BERN NC IS 77. PRECIP WILL WANE THIS
AFTERNOON/EVENING AS THE SFC WAVE LIFTS UP THE NE COAST AND LOW
LEVEL DRY AIR WORKS INTO THE REGION. HOWEVER...AS THE UPPER LOW
MOVES INTO THE DEEP SOUTH AND A STRONG SFC WAVE DEVELOPS ALONG THE
STALLED BOUNDARY...MOISTURE WILL RETURN OVERNIGHT WITH
CHANCE/LIKELY POPS BY THURSDAY MORNING.

NELY FLOW AND LOW CLOUDS WILL REMAIN ANCHORED OVER THE FA THROUGH
THURSDAY MORNING WITH VERY LITTLE CHANGES IN TEMP TRENDS
OVERNIGHT. LOWS EXPECTED TO RANGE FROM LOW 40S N TO UPPER 40S
SOUTH...ONLY A FEW DEGS COOLER THAN CURRENT TEMPS.

&&

.SHORT TERM /6 AM THURSDAY MORNING THROUGH FRIDAY/...
STRONG MID/UPPER LOW WILL LOCATE OVER THE LOWER MS VALLEY THURSDAY
MORNING AS THE SFC LOW STRENGTHENS ALONG THE STALLED BOUNDARY.
RAIN WILL BE ONGOING ACROSS THE PIEDMONT INTO SRN VA IN AREA OF
ISENTROPIC LIFT/DIVERGENCE ALOFT. STRONG DYNAMICS AND ABUNDANT
MOISTURE WILL ACCOMPANY THE UPPER LOW/PV ANOMALY AS IT LIFTS OUT
OF THE DEEP SOUTH AND INTO THE MID ATLANTIC THURSDAY AFTERNOON.
PRECIP WATERS WILL BE NEARLY ONE INCH WITH HIGH RH VALUES IN THE
IMPORTANT DGZ. SHARP HEIGHT FALLS WILL RESULT IN STRONG
FRONTOGENETIC FORCING AT THE SFC THURSDAY AFTERNOON AS A 200+ KT
JET EXISTS ACROSS THE NE. THIS WILL LEAD TO WIDESPREAD
RAIN...POSSIBLY HEAVY AT TIMES...OVER MUCH OF THE AFTERNOON
ACROSS THE ENTIRE FA. THE STRONGEST FRONTOGENETIC
FORCING/DIVERGENCE ALOFT WILL LOCATE OVER THE WRN AND NRN
FA...WHERE THE HIGHEST QPF AMOUNTS WILL OCCUR.

THE UPPER LEVEL SHORTWAVE WILL PHASE WITH THE NRN STREAM TROUGH
THURSDAY EVENING AS COLD SFC HIGH PRESSURE EXPANDS EWD FROM THE
GREAT PLAINS. AS THE SFC LOW TRACKS SOUTH OF THE FA THURSDAY
EVENING/OVERNIGHT...COLD AIR WILL ALLOW TEMPS TO DROP RAPIDLY
ALONG THE NRN PERIPHERY OF THE PRECIP. COLD AIR WORKING INTO THIS
DYNAMIC OF A SYSTEM WILL RESULT IN A QUICK CHANGE OVER TO SNOW
LATE THURSDAY AFTERNOON...FIRST ACROSS THE NW. HAVE GONE UNDER
MODEL GUIDANCE ON SNOW ACCUMULATIONS BASED ON THE ANTECEDENT
RAINFALL/MILD WEATHER WHICH HAS KEPT GROUND TEMPERATURES WARM.
HOWEVER...STRONG UVM IN THE DGZ WILL ALLOW FOR LARGER FLAKES AND
HEAVIER SNOWFALL RATES. THIS WILL HELP SNOW ACCUMULATE REGARDLESS
OF THE WARM GROUND CONDITIONS. ANOTHER THING TO OVERCOME IS LOW
LEVEL TEMPS HOVERING RIGHT AROUND FREEZING...TO SLIGHTLY ABOVE.
HAVE GONE UNDER MODEL GUIDANCE ON TEMPS TOMORROW EVENING AS PRECIP
FALLING INTO THE LOWER LEVELS WILL HELP COOL THE LOW LEVELS. AS
THE LOW PUSHES OUT OVER THE WATERS AND INTENSIFIES AS IT LIFTS
NE...COLD AIR WILL CONTINUE TO MOVE TO THE SW ALLOWING RAIN TO
CHANGE OVER TO SNOW ALL THE WAY TO THE COAST BY LATE THURSDAY
NIGHT/EARLY FRIDAY MORNING. AS DRY/COLD W/NW FLOW WORKS INTO THE
REGION...PRECIP WILL END QUICKLY NW TO SE THURSDAY NIGHT/EARLY
FRIDAY MORNING...UNDER CLEARING SKIES. WHEN ALL IS SAID AND
DONE...SNOWFALL AMOUNTS WILL RANGE FROM AROUND 4 TO 5 INCHES IN
THE NW TO HALF AN INCH ACROSS SE VA/NE NC. LOCATIONS ALONG THE
COAST WILL REMAIN WARM ENOUGH FOR LITTLE...IF ANY...SNOWFALL
ACCUMULATIONS. WITH THE POSSIBILITY OF WARNING CRITERIA BEING MET
(SREF PROBABILITIES OF >4 INCHES EXCEEDS 50 PCT)...HAVE OPTED TO
ISSUE A WINTER WEATHER WATCH AS OPPOSED TO A WINTER WEATHER
ADVISORY. ANOTHER THING TO CONSIDER IN THE HIGHLY DYNAMIC SYSTEM
IS PRECIP BANDING. STRONG FRONTOGENETIC FORCING AND SLIGHTLY
NEGATIVE SAT GEO POT VORT INDICATE BANDING WILL BE POSSIBLE AND
SOMETHING TO WATCH. BANDING WILL LEAD TO LOCALLY HIGHER SNOWFALL
AMOUNTS. GRASSY SURFACES WILL SEE THE MOST SNOWFALL WITH SOME
ACCUMULATION ON AREA ROADS AND HIGHWAYS. TOTAL QPF AMOUNTS WILL
RANGE FROM AN INCH TO AN INCH AND A HALF...WHICH ON ALREADY
SATURATED SOILS MAY LEAD TO ADDITIONAL HYDRO CONCERNS. A FLOOD
WATCH MAY BE NEEDED.

STRONG CAA ON FRIDAY (850 TEMPS FALL TO -7 TO -9C AND LOW LEVEL
THICKNESSES FALL OVER 20 M) AND AN EXISTING SNOW PACK WILL PREVENT
TEMPS FROM REACHING 40 ANY MANY LOCALES. WHILE SKIES WILL FINALLY
CLEAR FOR THE FIRST TIME IN SEVERAL DAYS...NORTHWEST WINDS 10 TO
15 MPH...STRONGER NEAR THE COAST...WILL MAKE IT FEEL EVEN COLDER.

 

CHESTERFIELD-
INCLUDING THE CITIES OF...COLONIAL HEIGHTS
410 PM EST WED JAN 16 2013

...WINTER STORM WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH LATE
THURSDAY NIGHT...

.TONIGHT...CLOUDY. RAIN LIKELY...MAINLY AFTER MIDNIGHT. LOWS IN THE
LOWER 40S. WEST WINDS AROUND 5 MPH...BECOMING NORTHWEST AROUND 5 MPH
AFTER MIDNIGHT. CHANCE OF RAIN 60 PERCENT.
.THURSDAY...RAIN. HIGHS IN THE LOWER 40S. NORTHEAST WINDS 5 TO
10 MPH. CHANCE OF RAIN 90 PERCENT.
.THURSDAY NIGHT...MOSTLY CLOUDY. RAIN AND SNOW EARLY IN THE
EVENING...THEN A CHANCE OF SNOW LATE IN THE EVENING. SNOW
ACCUMULATION OF 2 TO 4 INCHES. LOWS IN THE UPPER 20S. NORTH WINDS
AROUND 10 MPH. CHANCE OF PRECIPITATION 90 PERCENT.
.FRIDAY...SUNNY. HIGHS IN THE UPPER 30S. NORTHWEST WINDS 5 TO
10 MPH.
 

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If this storm goes any more south then the Hampton Roads is SOL.  Hopefully, we'll be in the thick of things when the coastal rides north instead of out to sea.

Agree, going to need to be under the juice.

 

Still think we have a little working room, if flakes fly its a win here.

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https://www.facebook.com/photo.php?fbid=471457219568208&set=a.148807335166533.25889.129478830432717&type=1&theater

 

DT basically says "screw you, Hampton Roads." What I am finding strange is how I went from being in his E zone, to his F zone with the rest of HR. It doesn't exactly make sense given that nothing drastic has changed on the models throughout the day.

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