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Snowstorm Potential 1/21 Part II


earthlight

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URGENT - WINTER WEATHER MESSAGE

NATIONAL WEATHER SERVICE MOUNT HOLLY NJ

346 AM EST FRI JAN 20 2012

...SNOW AND A WINTRY MIX EXPECTED TONIGHT AND SATURDAY...

.LOW PRESSURE DEVELOPING OVER THE MISSISSIPPI RIVER VALLEY TODAY

IS EXPECTED TO TRACK NORTHEAST TO THE MID-ATLANTIC COAST BY

SATURDAY MORNING...THEN INTENSIFY AS IT MOVES OUT OVER THE OCEAN

LATER SATURDAY AND SUNDAY. PRECIPITATION ASSOCIATED WITH THE LOW

WILL OVERSPREAD THE REGION TONIGHT...AND CONTINUE FOR MOST OF THE

DAY SATURDAY.

FOR THE LEHIGH VALLEY...SOUTHERN POCONOS AND NORTHWEST NEW

JERSEY...THE PRECIPITATION IS EXPECTED TO FALL PREDOMINANTLY IN

THE FORM OF SNOW. SEVERAL INCHES OF SNOW ACCUMULATION IS POSSIBLE

BY THE TIME THE SNOW ENDS SATURDAY EVENING.

FOR A PORTION OF NORTHEAST MARYLAND...NORTHERN DELAWARE...SOUTHEAST

PENNSYLVANIA AND A GOOD CHUNK OF NEW JERSEY...SNOW WILL CHANGE TO

SLEET AND FREEZING RAIN BEFORE IT CHANGES TO ALL RAIN SATURDAY

AFTERNOON. A FEW INCHES OF SNOW...AS WELL AS A COATING OF ICE...IS

EXPECTED LATE TONIGHT AND SATURDAY.

NJZ007-008-PAZ061-062-202215-

/O.EXA.KPHI.WS.A.0001.120121T0600Z-120122T0000Z/

WARREN-MORRIS-LEHIGH-NORTHAMPTON-

INCLUDING THE CITIES OF...WASHINGTON...MORRISTOWN...ALLENTOWN...

BETHLEHEM...EASTON

346 AM EST FRI JAN 20 2012

...WINTER STORM WATCH IN EFFECT FROM LATE TONIGHT THROUGH

SATURDAY EVENING...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A WINTER

STORM WATCH...WHICH IS IN EFFECT FROM LATE TONIGHT THROUGH

SATURDAY EVENING.

* LOCATIONS...PORTIONS OF THE LEHIGH VALLEY AND NORTHWEST NEW

JERSEY.

* HAZARD TYPES...SNOW AND FREEZING RAIN.

* ACCUMULATIONS...SNOW ACCUMULATION OF 4 TO 8 INCHES...ALONG WITH

UP TO A TENTH OF AN INCH OF ICE.

* TIMING....SNOW WILL OVERSPREAD THE REGION AFTER MIDNIGHT...FALLING

WITH VARYING INTENSITY INTO SATURDAY MORNING. THE SNOW WILL

GRADUALLY MIX WITH OR CHANGE TO SLEET AND FREEZING RAIN.

* IMPACTS...TRAVEL WILL BE HAZARDOUS ESPECIALLY ON UNTREATED

ROADWAYS.

* WINDS...NORTHEAST 5 TO 10 MPH.

* TEMPERATURES...IN THE UPPER 20S.

* VISIBILITIES...AS LOW AS ONE-HALF MILE AT TIMES.

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Starting to wonder if there's a freezing rain threat for parts of the Jersey shore and coastal Long Island toward the end of the event. Sfc temps never really get above freezing because of NE surface winds, and the 850mb warm nose crosses over, albeit briefly on the NAM and even GFS. The warm layer isn't too far above ground and it might still be precipitating by then. It wouldn't obviously be a major ice storm but 0.10-0.25" can still cause major problems. On top of several inches of snow.

My guess right now would be 5-7" from the GWB on northwest, 3-5" (snow to sleet) for the I-78 corridor and northern half of Long Island, and 2-4" (snow to sleet/freezing rain) southern Long Island and I-78 to I-195. 1-2" south of there, snow to rain.

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Losing QPF to virga will be our biggest concern with this storm, not mixing.

SWFE means the atmosphere will moisten quickly, dont worry about that, trust me

In other news, maybe a banding/csi signal nothern jersey maybe skirting the city at the height of the storm? will have to watch where that sets up

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SWFE means the atmosphere will moisten quickly, dont worry about that, trust me

In other news, maybe a banding/csi signal nothern jersey maybe skirting the city at the height of the storm? will have to watch where that sets up

Awesome I hope, how much snow you end up with last night?

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SWFE means the atmosphere will moisten quickly, dont worry about that, trust me

In other news, maybe a banding/csi signal nothern jersey maybe skirting the city at the height of the storm? will have to watch where that sets up

Hoping that late tonight we can see the snow come in as a wall, not broken up/showery. That way we can moisten it up fast and put down some accums quick.

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Hoping that late tonight we can see the snow come in as a wall, not broken up/showery. That way we can moisten it up fast and put down some accums quick.

Well, these things usually rip from the get go but with these swfe you see the shower broken precip just to the south of the rain/snow line so people are gonna go a little batty I am sure.

When everything is locked in on .3 to .4 and the euro hasnt budged in 4 runs, everyone should feel pretty good.

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Well, these things usually rip from the get go but with these swfe you see the shower broken precip just to the south of the rain/snow line so people are gonna go a little batty I am sure.

When everything is locked in on .3 to .4 and the euro hasnt budged in 4 runs, everyone should feel pretty good.

NAM still concerns me, but it might be a bit overdone on the precip and dynamics at play, and warming. The north bump at the end that usually occurs on these is still a little worrisome. I don't think it plain-rains at least north past southern Monmouth. I think there's at least a chance of a freezing rain/ice zone somewhere in between where it's all snow and eventually goes to rain.

I agree-several inches of snow this winter anywhere is a god send.

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