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Ians Birthday Blizzard Bomb Bonanza BECS Feb 9-11


Ji

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Surprised to see the Euro hold and even tick NW a bit given the other guidance. Most winters I would like where we stand right now given the GFS tendency to wash everything out too far SE.

The problem with the gfs is the vort getting killed. Im not sure what's causing it but that is whats causing the low to slide east as there is no h5 vort to pull it north and up the coast. If the vort keeps its strength from when it originally dives down the trough then it would be a hit.

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I can't think of any storms in the past that have given 12"+ snows to Norfolk and result in anything of significance for DC..

the track is pretty decent for here. i think this solution is probably not what will happen anyway.

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Surprised to see the Euro hold and even tick NW a bit given the other guidance. Most winters I would like where we stand right now given the GFS tendency to wash everything out too far SE.

the gfs is a bit of an outlier at this pt it seems so it might be right but i'd discount it at least slightly for now

I don't know..remember the Euro has been too wrapped/NW this winter. Is the GFS truly an outlier though, given that the GGEM is closer to it than the Euro?

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EXTENDED FORECAST DISCUSSION

NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD

226 PM EST SAT FEB 05 2011

VALID 12Z TUE FEB 08 2011 - 12Z SAT FEB 12 2011

FINAL GRAPHICS FLATTENED THE SYS ALONG THE SE COAST THU FROM THE

PRELIM RELEASES. OTHERWISE NO CHANGES WILL BE MADE TO FINAL

GRAPHICS. WE KEPT THE PREDOMINATELY 00Z/05 ECMWF ECMWF ENSEMBLE

BLEND.

MEAN SLOWLY PROGRESSIVE ERN CONUS TROUGHING SHOULD PERSIST THROUGH

MUCH OF NEXT WEEK WHILE RIDGING ALONG 135W IS FORECAST TO BREAK

DOWN AFTER THU. MODELS CONTINUE TO HAVE TROUBLE EVEN WITH THE

SHORTER TERM SYSTEMS...SO DETAILS REMAIN MURKY AT BEST.

HOWEVER...00Z/05 LARGE SCALE SYNOPTIC FLOW WAS IN GOOD AGREEMENT

THROUGH FRI/D6 WITH A POTENTIALLY DEEPENING CYCLONE MOVING FROM

THE GULF COAST THROUGH THE SOUTHEAST THEN INTO THE WESTERN

ATLANTIC. THE UPPER PATTERN OVER THE NORTHEAST PACIFIC BY THE END

OF THE WORK WEEK HAS TRENDED TOWARDS A TROUGH IN RECENT MODEL

RUNS...THOUGH A FAIR AMOUNT OF SPREAD EXISTS THERE IN THE

ENSEMBLES.

SOUTHERN STREAM ENERGY MOVING TOWARD THE TEXAS COAST WED/D4 SHOULD

FORM SFC LOW PRESSURE THAT MOVES TOWARD THE SOUTHEAST COAST BY

THU/D5. THE 00Z ECMWF HAD QUICKENED ITS PACE FROM YESTERDAY WHILE

THE CORRESPONDING GFS HAD SLOWED. THEREFORE SPREAD AMONGST THE 00Z

MODELS WITH THIS SE SYS HAS DECREASED FOR THU. QUESTIONS REMAINED

AS TO WHETHER THIS LOW WILL STAY FLAT AND MOVE OUT TO SEA OR MORE

AMPLIFIED AND RIDE UP THE COAST. FROM THE 00Z MODEL SUITE OF

DATA...A NUMBER OF SOLUTIONS WERE ON THE TABLE. MOST 12Z/05 MODELS

HAVE TRENDED FLATTER/MORE SUPPRESSED WITH THAT SYS AS DESCRIBED

BELOW.

DETERMINISTIC 12Z/05 MODELS:

THE NEW 12Z GFS HAS PRETTY GOOD CONTINUITY FROM ITS 00Z RUN OVER

MOST OF THE WEATHER MAP WITH FEW NOTABLE EXCEPTIONS. IT HAS

TRENDED FLATTER THAN ITS 00Z RUN WITH THE HOTLY DEBATED POTENTIAL

STORM DEVELOPING THU ALONG THE SE COAST OF THE CONUS. IT TRACKS

THIS SYS FLATTER AND TO THE RIGHT OF ITS CONTINUITY THEREAFTER

INTO THE WRN ATLANTIC. THE 12Z UKMET/CANADIAN/ARE ALSO FLATTER AND

MORE SUPPRESSED THAN THEY WERE IN THEIR 00Z RUNS. THE ECMWF HAS

THE MOST VIGOROUS COASTAL SYS OF ALL THE NEW MODELS...AND STILL

THREATENS A SNOWSTORM FROM AR ACROSS TN/KY INTO THE MID ATLANTIC

REGION. I WILL NOT SPECULATE ON SNOW AMOUNTS WITH SUCH LOW

CONFIDENCE IN THE OUTCOME ATTM.

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I don't know..remember the Euro has been too wrapped/NW this winter. Is the GFS truly an outlier though, given that the GGEM is closer to it than the Euro?

ggem is sort of a middle ground imo. not the best for us but at this range i'd take that over a track backing up over us or something.

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euro has it going from se GA to 200 miles east of Maine in 24 hours. How is it supposed to

have enough time to deposit accumulating snow anywhere in the Mid-Atlantic when moving

so quickly?

Not to draw any comparsions...

But does the February Blizzard of 1983 ring a bell? Storm was an extremely fast mover, yet dropped 30+ in Maryland...

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I am dying to see that Richmond BECS thread go to Part 97 inside of 18 hours...

I am beginning to wonder what is the most snow Richmond has ever gotten in a single season? And never mind the airport snow measurements.

Also what is the most snow Richmond has ever seen in ONE storm?

This looks to be south VA's year for snow setups - setting the incredible 1978-esque Lake Shore Drive Chicago Blizzard aside for the moment

With a bit more cold air and a touch more qpf - Who knows? Richmond's BIGGEST snow season EVER?

It's gonna take midlo two weeks to dig out from this - between his home snow setup and this upcoming blizzard

dont make me have to come down there and dig you out midlo

At the airport, the largest single-season snowfall total is 38.9 inches. The largest single-storm snowfall total is 21.6 inches, set in 1940.

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I mean, all the great analysis, but this is basically where we're at in C MD. -- NBD ATTM --

but what else can you really deduce right now?

Nice to see they are sounding reasonably optimistic still at this point, all things

considering.... it's gonna be cold enuf to snow, chances basically 50-50.

-------------------------------------

AREA FORECAST DISCUSSION

NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC

234 PM EST SAT FEB 5 2011

<snipped appreciably>

SYNOPSIS

LONG TERM /TUESDAY THROUGH SATURDAY/

CANADIAN HIGH PRESSURE WILL RETURN TUESDAY AND WEDNESDAY WITH DRY

AND COLD CONDITIONS EXPECTED. GUSTY NORTHWEST WINDS ARE EXPECTED

TUESDAY AS LOW PRESSURE INTENSIFIES OFF TO OUR NORTHEAST. ANOTHER

STORM SYSTEM MAY IMPACT THE REGION WEDNESDAY NIGHT AND THURSDAY.

TRACK AND STRENGTH OF THIS SYSTEM REMAIN UNCERTAIN THIS FAR

OUT...BUT WITH COLDER AIR IN PLACE ANY PRECIPITATION WOULD LIKELY BE

IN THE FORM OF SNOW. WILL CONTINUE TO MONITOR THIS SITUATION OVER

THE NEXT FEW DAYS.

/////////////////////////////////////////////////////////////

--------------------------------------

Updated: 3:00 PM EST on February 5, 2011 <snipped>

Wednesday Night: A chance of snow. Cloudy, with a low around 23

Chance of precipitation is 40%.

Thursday: A chance of snow. Cloudy, with a high near 27.

Chance of precipitation is 50%.

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12Z GFS still had it; don't know about the EURO, what's your point?

My point is that these cold outbreaks have not materialized this year. Right now, even the GFS has my highs in the upper 20's, and that is only for a couple of days. My money says I'll be lucky to see any days with a high that doesn't reach 30. That's about 10-12 degrees below average. I hardly call that an arctic outbreak. Just yesterday at 6z, the GFS had it bone chilling cold here next week. The EURO has done this several times as well. As for the snow, the GFS yesterday at 6z showed a tremendous storm potential. Now what does it show? The EURO is the one throwing out the bone now.

Heck, I hope it snows and gets frigid just like you. I'm just very skeptical. After this winters storm tracking, I'd say we'd all be wise to be very skeptical until a couple days out.

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