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Late February 2013 Mid-Long Range Discussion


TUweathermanDD

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The storm on Tuesday may have the best model agreement across the board than any other storm I've seen this year. Ensembles are good matches to ops too.

Not a snow storm, but interesting to see such agreement at 72 hours after the year we've had.

Kansas City is going to get destroyed.

 

And yeah, I agree re: model agreement.  It's crazy.  But that's of course only because we're not getting a snowstorm.

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Kansas City is going to get destroyed.

And yeah, I agree re: model agreement. It's crazy. But that's of course only because we're not getting a snowstorm.

Although the new (00Z) NAM would say otherwise, I have a feeling the heaviest bands will be south of the KC metro. I say bands because there's little doubt that convection is going to be a player in that trowal zone....probably more than the last event, since there's more potential elevated instability to work with. And with convection comes a snowfall map that's more binary than smooth (feast or famine).

...but not here, again :-(

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One thing seems in agreement at this point. March is looking cooler than normal. Just a kick in the jewels after another crappy winter.

seems to happen a lot in NINA winters

nonetheless, a beautiful day and the sun feels real warm

that said, I wouldn't be surprised at all if something becomes at least "threatening" to us over the next 7-10 days

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Wichita with a #2 then another top 5 would be pretty big. Forecast earlier from them was for another #2.

 

 

Euro gives Atlanta 4+ at the end of the run. That would be fun.

 

Next Sun sorta maybe worth watching per Euro as is that storm at the end of the run if it's not so suppressed.

 

this usually happens in Ninos, but I figure to add insult to injury something will cut off in dixie in late March or Early April. Atlanta will get 3" of daytime paste on like March 26th and the Smokies will get 16-24"

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this usually happens in Ninos, but I figure to add insult to injury something will cut off in dixie in late March or Early April. Atlanta will get 3" of daytime paste on like March 26th and the Smokies will get 16-24"

but since this is more of a NINA than anything else, it'll trend north, though not necessarily far enough or possibly too far given this year

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For those west of the BR, Tuesday could be messy. Certainly would also appear that it's not an outcome that's set in stone as to type.

From LWX:

1...TIMING. THE TREND OF THE SREF OVER THE LAST 24 HRS HAS

BEEN TO SLOW DOWN PRECIP ONSET ACROSS OUR CWA. THIS IS BACKED UP

BY THE LATEST RUNS OF THE NAM AND GFS...AND QUICK PEEK AT LATEST

12Z ECMWF ALL SUPPORT THIS SLOWING OF PRECIP ONSET. EXPECT

MEASUREABLE PRECIP TO HOLD OFF MAINLY AFTER 12Z...EXCEPT UP TO CHC

POPS IN THE FAR SW ZNS AFTER 09Z. THE 09Z SREF/12Z GFS/ECMWF SOLUTIONS

ARE ALL PRETTY CLOSE IN DEPICTING A BAND OF PRECIP OVERSPREADING

THE AREA DURING THE MORNING HOURS...AND BY AFTERNOON HAVE DEFINITE

POPS CWA WIDE.

2...WINTER P-TYPE AND AREAL EXTENT.

18Z NAM CONTS TO DEPICT A SGFNT PD OF FZRA FOR THE PTMC

HIGHLANDS...WHILE THE 18Z GFS BUFR DATA PAINTS IT AS MOSTLY SNOW.

ECMWF TKNS SCHEMES SUGGEST A MELTING LYR BUT COLD LLVLS TO

START...WARMING EVERYTHING DURING THE AFTN.

GIVEN THE STRONG WAA OCCURRING THROUGHOUT THE SOUNDING...WOULD

EXPECT A WINTRY MIX...WITH SNOW/SLEET EXPECTED EARLY IN THE

MORNING IN AREAS MAINLY WEST OF THE BLUE RIDGE...AND TRANSITION TO

MORE SLEET AND/OR FREEZING RAIN AS THE MORNING PROGRESSES. FOR THE

DC BALTIMORE METRO AREAS...A BRIEF PERIOD OF SLEET/SNOW AT ONSET...

BUT WOULD QUICKLY TRANSITION TO ALL RAIN.

3...QPF LIQUID AMOUNTS. PROGS SUGGEST A RANGE BETWEEN ONE HALF TO

NEAR ONE INCH CWA-WIDE. 12Z GFS IS MORE PROGRESSIVE WITH THE

SYSTEM AND SUGGESTS ABOUT A 5-7 HOUR PERIOD OF MODERATE QPF WITH

THE PASSAGE OF A SINGLE FRONTEGENTICAL FORCED BAND. 12Z NAM IS

SLOWER FOR QPF TO DEPART AND KEEPS SOME QPF THROUGH 06Z WED.

ALTHO THERE ARE STILL ISSUES TO BE RESOLVED...THERE IS ENOUGH

EVIDENCE THAT THERE IS THE POTENTIAL FOR MESSY CONDS IN THE PTMC

HIGHLANDS...SPCLY TUE MRNG. HV ISSUED A WINTER STORM WATCH FOR

THESE CNTYS. WHILE THE TRIGGER ATTM WUD BE ICE ACCUM...KEPT RATHER

GENERIC WORDING IN CASE LATER SOLNS LEAN MORE TWD GFS /IE...SNW-

SLEET/. WL BE MONITORING LATER GDNC IN CASE THE WATCH NEEDS TO BE

EXPANDED EWD.

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