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Tracking the Jan 7-9 threat---for those with strong hearts


MDstorm

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We have been reduced to hoping for flurries.

My God, how the mighty have fallen.

12z NAM gives BWI .08" of liquid equivalent. With decent ratios, that might be 1" of snow. That would be a 50% increase to my seasonal total. I'm riding it all the way :scooter::snowman:

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The 72 hour GFS has the vortex from Hades over the great lakes which might screw things up for next week depending on the timing of the other players. It's much stronger than the previous run.

The primary southern s/w is also slower on this run though, so perhaps it comes out in the wash?

Correction...that was the first storm which goes OTS.

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The primary southern s/w is also slower on this run though, so perhaps it comes out in the wash?

Correction...that was the first storm which goes OTS.

LOL...guess it doesn't go OTS. Seems to hang around to merge with the Plains s/w.

Wow...funky ass solution. Think it might be a good hit though.

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LWX very "bullish" with the snow tomorrow night and Friday.

.SHORT TERM /THURSDAY NIGHT THROUGH FRIDAY/...

-- Changed Discussion --A LOW RETROGRADING FROM QUEBEC WILL INTERACT WITH ANOTHER LOW

DROPPING SOUTHEAST FROM MANITOBA OVER THE NORTHERN GREAT

LAKES...SENDING A MID LEVEL TROUGH AND COLD FRONT EAST ACROSS THE

MID ATLANTIC.

SNOW POTENTIAL...WITH MID LEVEL CONVERGENCE/LIFT OCCURRING ALONG THE

TROUGH AXIS...SATURATION IS EXPECTED TO TAKE PLACE THROUGH THE

DENDRITIC SNOW GROWTH THERMAL LAYER. THIS WILL MAXIMIZE THE LIMITED

MOISTURE AVAILABILITY AND ALLOW A BAND OF SNOW TO DEVELOP FROM THE

PIEDMONT/NORTHERN SHENANDOAH VALLEY ACROSS TO THE CHESAPEAKE BAY.

BOTH THE 18Z NAM AND 12Z GFS SUGGEST THIS BAND WILL INTENSIFY AS IT

PROGRESSES EAST...SO SNOWFALL OF PERHAPS A QUICK HALF INCH ACROSS

THE BLUE RIDGE AND WEST WOULD INCREASE TO AROUND AN INCH FOR

NORTHERN VIRGINIA AND CENTRAL MARYLAND. TIMING LOOKS TO BE LATE

THURSDAY NIGHT WEST/EARLY FRIDAY MORNING EAST...JUST IN TIME FOR THE

MORNING RUSH. THEREFORE DESPITE CURRENTLY EXPECTED SNOWFALL BELOW

ADVISORY CRITERIA /2 INCHES/ THE IMPACT ON MORNING TRAVEL WOULD

STILL WARRANT A WINTER WEATHER ADVISORY FOR THE GREATER BALT-WASH

METRO.

http://forecast.weather.gov/product.php?site=NWS&issuedby=LWX&product=AFD&format=CI&version=1&glossary=1&highlight=off

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In all seriousness, not sure what they're seeing on the 18z NAM. Gives DC and Balt maybe a couple hundredths at most. Couple as in .01 or .02. Not .08.

Oh well...I'm just going to pretend we're getting 1" of snow until I wake up to sunny skies and bare ground Friday and Saturday mornings.

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In all seriousness, not sure what they're seeing on the 18z NAM. Gives DC and Balt maybe a couple hundredths at most. Couple as in .01 or .02. Not .08.

Oh well...I'm just going to pretend we're getting 1" of snow until I wake up to sunny skies and bare ground Friday and Saturday mornings.

must have meant 12z tho the 18z does still have a band move through with the front. im not terribly concerned about qpf output either way.

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i hang my weenie on Jan 5,2003. NAM and GFS gave us .01 qpf for a clipper and we got 5 inches

must have gone south.. this is basically a cold front passage.

i think we'll get the ground whitened in many spots at least.

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Seems like everyone has already punted on tonight/tomorrow's flizzard for next week, but LWX is still "optimistic" on this one. Not sure I know the reason why though. They're saying around 1" for Balt and points N/E.

http://www.erh.noaa.gov/er/lwx/winterstorm/

.SHORT TERM /6 PM THIS EVENING THROUGH 6 AM FRIDAY/...

-- Changed Discussion --THERE WILL BE TWO MORE UPPER DISTURBANCES TO MOVE INTO THE AREA TNGT

INTO FRI MRNG. THE LEADING SHORTWAVE TROUGH WILL MOVE THRU LATE

THIS EVE INTO THE OVERNIGHT HRS. THIS SYSTEM SHOULD BE WEAK AND HAVE

LIMITED MOISTURE TO WORK WITH...ESPECIALLY EAST OF THE ALLEGHENY

FRONT. IT WILL...HOWEVER...HELP SATURATE THE ATMOSPHERE AND BRING

INCREASING CLOUDS TO THE ENTIRE FCST AREA TNGT. 00Z NAM/GFS

DIAGNOSTICS REVEAL SUFFICIENT MID-LVL LIFT FOR LIGHT SNOW TO REACH

THE WRN SLOPES OF THE ALLEGHENY FRONT STARTING THIS EVE.

VEERING WLY FLOW IN WAKE OF THE FIRST SHORTWAVE TROUGH WILL HELP

DRAG A COLD FRONT TOWARD THE REGION BY THE ERY MRNG. MEANWHILE...THE

MAIN UPPER LOW WILL BEGIN TO INTERACT WITH A SECOND SHORTWAVE

TROUGH OVER THE GREAT LAKES AS AN ULVL JET STREAK DIVES SWD ON THE

BACKSIDE OF THE PRIMARY TROUGH. FORCING AHEAD OF THE TROUGH AND

COLD FRONT WILL LEAD TO A PERIOD OF LIGHT SNOW ACROSS MOST OF THE

AREA DURING LATE NGT/ERY MRNG. 00Z CROSS SECTIONAL ANALYSIS SHOWS

THE POTENTIAL FOR A 3-6 HR PERIOD OF ENHANCED LIFT/MESOSCALE

BANDING IN A NARROW TONGUE OF INSTABILITY AHEAD OF THE COLD FRONT

AND APPROACHING TROUGH. WHILE THE EXACT LOCATION OF BANDING IS

UNKNOWN ATTM...IT APPEARS THAT THE BAND WOULD GRADUALLY BECOME

BETTER ORGANIZED AS IT MOVES EAST TOWARD THE METRO AREAS. WHILE

SNOW TOTALS ACROSS THE METRO AREAS WILL BE LIGHT AND SNOW WILL

FALL IN A SHORT PERIOD...IT COULD BE ENOUGH TO DROP A QUICK INCH

OF SNOW IN SOME SPOTS AND ADVERSELY IMPACT THE MRNG RUSH HR

COMMUTE. THEREFORE...A WINTER WX ADVISORY MAY NEED TO BE ISSUED

LATER TDA OR TNGT.

THE BEST LIFT/HIGHEST SNOWFALL AMOUNTS WILL BE ON THE WRN SLOPES OF

THE ALLEGHENY FRONT...WHERE A WINTER WX ADVISORY HAS BEEN ISSUED

STARTING 10 PM TNGT. SNOWFALL TOTALS OF 2-4 INCHES ARE EXPECTED

THERE. MOST OF THESE SNOWFALL AMOUNTS WILL OCCUR OVERNIGHT AND DURING

THE FIRST HALF OF THE MRNG WITH THE SECOND SHORTWAVE TROUGH.-- End Changed Discussion --

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Seems like everyone has already punted on tonight/tomorrow's flizzard for next week, but LWX is still "optimistic" on this one. Not sure I know the reason why though. They're saying around 1" for Balt and points N/E.

http://www.erh.noaa....wx/winterstorm/

We're all just avoiding making a loud noise or looking it in the eye so it does not get frightened away.

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Watching the 12Z GFS come in and the upper level energy for the 'norlund' tough to be is a little weaker, yet the back side of the trough is stronger and farther south.... I think we could allow the snow to drop farther south before the spin up the coast.... I also see the upper level energy supporting snow on Saturday for Baltimore

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