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The Jan 9-11 Storm


Wow

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So, it is time for FFC to S&%t or get off the pot. Now they cannot really use the "there is too much model disagreement" excuse, because in actuality there is not that much difference any more. The POP will not be 50%, and it is not going to be rain.

Cheez, my thoughts exactly, but your thoughts on the matter are much more educated than, so help me. I am trying to see if there is a way for us to get too much WAA and get us just warm enough to go to liquid. It happens all too often here. I have a hard time seeing that happen, but again, my model reading skills are weak. Unless I am missing something, I have no idea why FFC is still on the pot. 72 hrs out and really good model agreement.

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Cheez, my thoughts exactly, but your thoughts on the matter are much more educated than, so help me. I am trying to see if there is a way for us to get too much WAA and get us just warm enough to go to liquid. It happens all too often here. I have a hard time seeing that happen, but again, my model reading skills are weak. Unless I am missing something, I have no idea why FFC is still on the pot. 72 hrs out and really good model agreement.

IMHO they should still be a bit on the pot....system is still in the PAC, while the models are great who knows what might happen come Saturday afternoon in TX....but then again they should probably be setting the tone that WWA or WSW could be coming down the pipe in a few days.

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Could the snow actually start on Sunday afternoon ? FFC has me with a 40% chance of Rain/Snow for Sunday and 70% snow for Sun night. I was thinking though that the snow wouldn't start until Monday ?

You thought that after reading everyone's comments today. Scan back a few pages...

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IMHO they should still be a bit on the pot....system is still in the PAC, while the models are great who knows what might happen come Saturday afternoon in TX....but then again they should probably be setting the tone that WWA or WSW could be coming down the pipe in a few days.

Not expecting them to put any watches out yet, but I would think an AFD that mentions the potential that lies ahead without saying "too much uncertainty in modeling" or "will pass on to night shft".

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Jesus Christ, typical Accuweather map, paint the NE wit hall the snow and just don't give a crap about the SE...I can see it now, "It doesn't ever get cold south of VA just give them ice".

I think the DGEX is the only model that has shown the really heavy stuff that far NW. At least they throw I85 a bone with "ice". LOL

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AREA FORECAST DISCUSSION

NATIONAL WEATHER SERVICE COLUMBIA SC

313 PM EST THU JAN 6 2011

LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/

THE LONG TERM PERIOD LOOKS TO BE A MESS...WITH CONTINUED LOW

CONFIDENCE AT THIS TIME. MODELS CONTINUE TO BE SLIGHTLY OUT OF

SYNC WITH TIMING AND TRACK...ALTHOUGH THEY APPEAR TO BE SLOWLY

TRYING TO CLOSE IN ON A TRACK ACROSS NORTHERN FLORIDA AND THEN OFF

THE CAROLINA COAST WITH THE SYSTEM FROM SUNDAY NIGHT INTO TUESDAY.

AT THIS TIME...MOISTURE LOOKS TO BE ON THE INCREASE LATE SUNDAY

AHEAD OF DEVELOPING LOW PRESSURE SYSTEM IN THE NORTHERN GULF OF

MEXICO. POPS BEGINNING AS SLIGHT CHANCE...THEN INCREASING TO

CHANCE OVERNIGHT SUNDAY...WITH LIKELY POPS BY MONDAY MORNING AND

THROUGH THE DAY. BIG QUESTION REMAINS AS TO PRECIP TYPE AND TIMING

WITH THIS SYSTEM. LOW LEVEL TEMPS APPEAR TO BE COLD ENOUGH FOR

MIXED PRECIP AT THE ONSET...WITH MIXED EVENT OVERNIGHT SUNDAY INTO

MONDAY MORNING. 850 ZERO LINE STARTS OFF SOUTH OF THE FORECAST

AREA SUNDAY EVENING...THEN SLOWLY TRACKS NORTHWARD

OVERNIGHT...SETTING UP JUST NORTH OF THE CENTRAL MIDLANDS MONDAY

MORNING. MODEL SOUNDINGS DO SHOW WARM NOSE ALOFT MOVING INTO THE

SOUTH AND CENTRAL COUNTIES BY MONDAY MORNING...WITH NORTHERN

COUNTIES STILL BELOW FREEZING ALOFT. TOP DOWN TOOL GIVES A MIXTURE

OF RAIN/SNOW/SLEET/FREEZING RAIN DURING THE OVERNIGHT HOURS ACROSS

MUCH OF THE SOUTHERN AND CENTRAL FORECAST AREA. MORE OF A SNOW

EVENT ACROSS NORTHERN AND WESTERNMOST COUNTIES. EVEN IF THIS DOES

HOLD TRUE...ITS STILL TOO FAR OUT TO PIN DOWN ANY ACCUMULATIONS.

HOWEVER...MONDAY MORNING HAS THE POTENTIAL TO BE KIND OF MESSY.

DURING THE DAY MONDAY TEMPS WARM UP ENOUGH ACROSS SOUTH AND

CENTRAL TO TURN MUCH OF THE PRECIP OVER TO RAIN...WHILE ACROSS THE

NORTH MORE OF A SNOW/SLEET EVENT DURING THE DAY. AS FOR

TEMPS...MUCH OF THE REGION MAY STRUGGLE TO GET MUCH ABOVE THE

FREEZING MARK ON MONDAY AS PRECIP...COLD ADVECTION...AND CLOUDS

INHIBIT ANY HEATING.

SYSTEM BEGINS TO MOVE OFF THE COAST MONDAY NIGHT INTO

TUESDAY...WITH SOME WRAP AROUND MOISTURE STILL AROUND. QUESTION AS

TO HOW MUCH MOISTURE REMAINS IN THE SNOW GROWTH REGION AT THAT

POINT. EVEN SO...COULD SEE ANOTHER MIXED EVENT MONDAY NIGHT INTO

TUESDAY MORNING AS SYSTEM EXITS. DRIER WEATHER EXPECTED IN THE WAKE

OF THIS SYSTEM THROUGH THURSDAY.

TO END WITH...I DO WANT TO REITERATE THAT THERE CONTINUES TO BE

QUITE A BIT OF UNCERTAINTY WITH THIS SUNDAY-TUESDAY SYSTEM.

FURTHER FINE TUNING OF THE FORECAST IS SURE TO TAKE PLACE OVER THE

NEXT 24/48/72 HOURS.

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The Thu 12Z Euro has a whopping ~6-7" of snow for ATL area based on qpf of ~0.70" and 850's that are mainly in the -2 to -4C range. The snow starts ~8-10 PM Sun evening and lasts until ~8-10 AM Mon, a nice 12 hour event if this verifies.

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GSP:

.LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/...

AS OF 300 PM THU...CONFIDENCE CONTINUES TO INCREASE REGARDING THE

POTENTIAL FOR AN EARLY WEEK WINTER STORM ACROSS THE CWFA. NOW ALL

12Z OPS RUNS OF THE ECMWF/GFS AND GEM SHOW A MILLER A TYPE SYSTEM

MOVING SOUTH OF THE AREA MONDAY AND TUE. THE LOW TAKES A SLOW TRACK

FROM THE LA COAST SUN EVENING...REACHING CAPE HATTERAS BY LATE TUE.

DEEP MOISTURE AND SYNOPTIC SCALE LIFT MOVE INTO THE AREA SUN NITE

AND CONTINUES ON MONDAY. THIS LIFT MOVES EAST MON NITE. HOWEVER...

DEEP MOISTURE AND LOW LEVEL ISENTROPIC LIFT REMAIN ACROSS THE AREA

MON NITE AND FINALLY MOVES NE OF THE AREA TUE. FCST SOUNDINGS SHOW A

PROLONGED PERIOD OF A NEAR ZERO ISOTHERMAL LAYER ACROSS MUCH OF THE

AREA. THE H85 ZERO LINE DOES MOVE NORTH INTO THE CWFA. HOWEVER...

THIS COULD BE OVERDONE IF DYNAMIC COOLING AFFECTS TAKE OVER. THIS IS

BEGINNING TO LOOK LIKE THE JANUARY 1988 SNOW STORM WHERE A WEAK LOW

PRESSURE MOVED THROUGH THE GULF AND A PROLONGED PERIOD OF ISENTROPIC

LIFT REMAINED OVER THE AREA...EVEN THO SYNOPTIC LIFT WAS WEAK. THIS

PRODUCED A LARGE AREA OF 1 FOOT ACCUMS. IT IS TOO EARLY TO SAY

WHETHER THIS MUCH SNOW DEVELOPS...HOWEVER IT IS IN THE REALM OF

POSSIBILITY.

I HAVE LIKELY POP MOVING IN SUN NITE AND CONTINUING THRU MONDAY.

THIS RESULTS IN SNOW ACROSS ALL THE CWFA SUN NITE...WITH SLEET

MIXING IN SOUTH OF I-85 DURING THE DAY MONDAY. THIS P-TYPE PATTERN

CONTINUES MON NITE AND TUE AS PRECIP ENDS FROM THE SW. THEN A

PROLONGED PERIOD OF NW FLOW SNOW DEVELOPS ACROSS THE TN BORDER

COUNTIES TUE NITE THRU THU. EVEN WITH A CONSERVATIVE APPROACH TO

TEMPS AND QPF...WHICH I HAVE TAKEN...SNOWFALL WELL ABOVE WARNING

CRITERIA IS POSSIBLE ACROSS ALL THE CWFA SUN NITE THRU TUE...BEFORE

ADDITIONAL SNOWFALL DEVELOPS ACROSS THE TN BORDER COUNTIES THRU THU.

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