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Potential storm February 12-13 2014


famartin

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Philly riding the snow/mix line, N&W burbs get crushed

 

Allentown sitting pretty this run ...long way to go

 

About half the stuff that falls at PHL is mix/rain, maybe a little more snow than rain/mix depending on how fast the 850s climb positive as it approaches how fast they crash down negative as the storm departs. Certainly a great run for the burbs. 

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Question? How do the models predict the temps? It seems impossible...so much snow hanging around. 

 

Well, for one, what happens aloft has NOTHING to do with the surface snow-pack, temp wise. 

 

There was a 1996 event I'll never forget:  Jim Cantore spent the morning saying that the high snow pack in the wake of the Blizzard of 96 would prevent a changeover in Philly.  Philly ended up changing to rain after just a couple inches.  The heavy snow was near Harrisburg.

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Well, for one, what happens aloft has NOTHING to do with the surface snow-pack, temp wise. 

 

There was a 1996 event I'll never forget:  Jim Cantore spent the morning saying that the high snow pack in the wake of the Blizzard of 96 would prevent a changeover in Philly.  Philly ended up changing to rain after just a couple inches.  The heavy snow was near Harrisburg.

 

Ok...gotcha. I always wondered? Thanks.

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Well, for one, what happens aloft has NOTHING to do with the surface snow-pack, temp wise. 

 

There was a 1996 event I'll never forget:  Jim Cantore spent the morning saying that the high snow pack in the wake of the Blizzard of 96 would prevent a changeover in Philly.  Philly ended up changing to rain after just a couple inches.  The heavy snow was near Harrisburg.

I was in Sommerville  working for that storm. Could not travel south on RT206 due to flooding. Had to go north to RT 202 and down 31. I think I remember some lightning with that storm.

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Winter Storm Watch

URGENT - WINTER WEATHER MESSAGE

NATIONAL WEATHER SERVICE MOUNT HOLLY NJ

328 PM EST MON FEB 10 2014

...POTENT COASTAL STORM TO AFFECT THE REGION MID WEEK...

DEZ001-MDZ008-NJZ016>019-PAZ070-071-101>106-110430-

/O.NEW.KPHI.WS.A.0006.140213T0000Z-140214T0600Z/

NEW CASTLE-CECIL-SALEM-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-

DELAWARE-PHILADELPHIA-WESTERN CHESTER-EASTERN CHESTER-

WESTERN MONTGOMERY-EASTERN MONTGOMERY-UPPER BUCKS-LOWER BUCKS-

INCLUDING THE CITIES OF...WILMINGTON...ELKTON...PENNSVILLE...

GLASSBORO...CAMDEN...CHERRY HILL...MOORESTOWN...MOUNT HOLLY...

MEDIA...PHILADELPHIA...HONEY BROOK...OXFORD...WEST CHESTER...

KENNET SQUARE...COLLEGEVILLE...POTTSTOWN...NORRISTOWN...

LANSDALE...CHALFONT...PERKASIE...MORRISVILLE...DOYLESTOWN

328 PM EST MON FEB 10 2014

...WINTER STORM WATCH IN EFFECT FROM WEDNESDAY EVENING THROUGH

LATE THURSDAY NIGHT...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A WINTER

STORM WATCH...WHICH IS IN EFFECT FROM WEDNESDAY EVENING THROUGH

LATE THURSDAY NIGHT.

* LOCATIONS...THIS WATCH INCLUDES FAR SOUTHEASTERN

PENNSYLVANIA...INCLUDING THE PHILADELPHIA METRO

AREA...SOUTHWESTERN NEW JERSEY...FAR NORTHEASTERN MARYLAND...AND

NORTHERN DELAWARE.

* HAZARD TYPES...SNOW...SLEET...AND FREEZING RAIN.

* ACCUMULATIONS...SNOW ACCUMULATIONS ARE FORECAST TO GENERALLY

RANGE FROM 6 TO 8 INCHES WITH AMOUNTS OVER 8 INCHES POSSIBLE IN

THE HIGHER TERRAIN OF EASTERN PENNSYLVANIA. IN ADDITION...ICE

ACCUMULATIONS ARE EXPECTED TO RANGE FROM A TRACE UP TO ONE

QUARTER INCH.

* TIMING...PRECIPITATION SHOULD BEGIN AS MOSTLY SNOW WEDNESDAY

NIGHT. THE SNOW IS FORECAST TO CHANGE OVER TO A

SNOW...SLEET...AND FREEZING RAIN MIX DURING THE DAY

THURSDAY...BEFORE CHANGING TO SNOW AND TAPERING OFF THURSDAY

NIGHT.

* IMPACTS...TRAVEL COULD BE SIGNIFICANTLY IMPACTED ACROSS THE

REGION ESPECIALLY ON THURSDAY. IN ADDITION TO TRAVEL

IMPACTS...WINDS OF 10 TO 20 MPH WITH GUSTS UP TO 25 MPH WILL BE

POSSIBLE ON THURSDAY WHICH COULD LEAD TO POWER OUTAGES IF

SIGNIFICANT ICE ACCUMULATIONS OCCUR BY THE TIME WINDS INCREASE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT

SNOW...SLEET...OR ICE ACCUMULATIONS THAT

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