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NYC/PHL Dec 26-27 Potential - Part 7


am19psu

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From Upton's AFD.

SHORT TERM /6 AM SUNDAY MORNING THROUGH TUESDAY/...

WE WILL BE ISSUING BLIZZARD WARNINGS FOR MUCH OF THE CWA...AND

WINTER STORM WARNINGS FOR THE LOWER HUDSON VALLEY...FOR THE

INTENSE STORM PROGGED TO IMPACT THE AREA FROM SUNDAY INTO MONDAY

AFTERNOON. EXPECTATION IS FOR HEAVY SNOW TO DEVELOP EARLIER THAN

EXPECTED...BY MID TO LATE AFTERNOON SUNDAY...AND CONTINUE INTO

MUCH OF SUNDAY NIGHT. TOTAL ACCUMULATIONS SHOULD RANGE FROM 8-12

INCHES NW OF NYC AND 12-16 INCHES MOST ELSEWHERE...WITH HIGHER

LOCAL AMOUNTS WHERE BEST MESOSCALE BANDING SETS UP. STILL COULD BE

SOME MIXING ISSUES ACROSS EASTERN LONG ISLAND AND SOUTHEAST CT.

NORTHERLY WINDS WILL GUST WELL OVER 35 MPH OVER MOST OF THE

BLIZZARD WARNING AREA...APPROACHING 50-55 MPH OVER CENTRAL AND

EASTERN LONG ISLAND AT THE HEIGHT OF THE STORM...WITH CONSIDERABLE

BLOWING/DRIFTING SNOW AND VERY POOR VSBY. MORE DETAILS TO FOLLOW

BY ABOUT 4 PM.

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I think upton is being conservative. Looks like 12"+ is a lock for nyc metro with 14-18" with 30-50 mph winds being likely...the most amazing 24 hr model turnaround in a positive way in my life

Pure coastal storm, with pure strong winds and powdery snow. This could be an historical snow storm when all is said and done.

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I think upton is being conservative. Looks like 12"+ is a lock for nyc metro with 14-18" with 30-50 mph winds being likely...the most amazing 24 hr model turnaround in a positive way in my life

Cant remember being on this side of a shift like this. Amazing. Enjoy folks...

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I think upton is being conservative. Looks like 12"+ is a lock for nyc metro with 14-18" with 30-50 mph winds being likely...the most amazing 24 hr model turnaround in a positive way in my life

They always do this... You can't predict more than 12"+ realistically.. They would be doing a disservice.. The bottom line is that they said 12-16" which locally higher amounts.. That seems pretty fair...

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Why anyone would use the ECMWF at 36 hours for QPF baffles me. Just get the general idea from the Euro, I wouldn't debate semantics with it's QPF at this short range....it is generally off. Track, placement, and deepening of surface low look great and upper levels supports a MECS-HECS still.

Actually EC QPF is pretty good in the short term. As good or maybe even slightly better than the GFS. It does have a slight dry bias to counter the GFS's slight wet bias. A blend is likely the best way to go.

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Blizzard Warning

URGENT - WINTER WEATHER MESSAGENATIONAL WEATHER SERVICE NEW YORK NY355 PM EST SAT DEC 25 2010...A MAJOR WINTER STORM WILL IMPACT THE REGION FROM SUNDAY THROUGHMONDAY AFTERNOON...CTZ007>012-NJZ002-004-006-103>108-NYZ071>075-078>081-176>179-260500-/O.UPG.KOKX.WS.A.0005.101226T1800Z-101227T1800Z//O.NEW.KOKX.BZ.W.0002.101226T1100Z-101227T2300Z/NORTHERN MIDDLESEX-NORTHERN NEW LONDON-SOUTHERN FAIRFIELD-SOUTHERN NEW HAVEN-SOUTHERN MIDDLESEX-SOUTHERN NEW LONDON-WESTERN PASSAIC-EASTERN PASSAIC-HUDSON-WESTERN BERGEN-EASTERN BERGEN-WESTERN ESSEX-EASTERN ESSEX-WESTERN UNION-EASTERN UNION-SOUTHERN WESTCHESTER-NEW YORK (MANHATTAN)-BRONX-RICHMOND (STATEN ISLAND)-KINGS (BROOKLYN)-NORTHWESTERN SUFFOLK-NORTHEASTERN SUFFOLK-SOUTHWESTERN SUFFOLK-SOUTHEASTERN SUFFOLK-NORTHERN QUEENS-NORTHERN NASSAU-SOUTHERN QUEENS-SOUTHERN NASSAU-355 PM EST SAT DEC 25 2010...BLIZZARD WARNING IN EFFECT FROM 6 AM SUNDAY TO 6 PM ESTMONDAY...THE NATIONAL WEATHER SERVICE IN UPTON HAS ISSUED A BLIZZARDWARNING...WHICH IS IN EFFECT FROM 6 AM SUNDAY TO 6 PM EST MONDAY.THE WINTER STORM WATCH IS NO LONGER IN EFFECT.* LOCATIONS...NORTHEAST NEW JERSEY...NEW YORK CITY AND ITS IMMEDIATE SUBURBS...LONG ISLAND...AND COASTAL AND INTERIOR SOUTHEAST CONNECTICUT.* HAZARDS...HEAVY SNOW AND STRONG WINDS...WITH CONSIDERABLE BLOWING AND DRIFTING OF SNOW AND NEAR ZERO VISIBILITY AT TIMES.* ACCUMULATIONS...11 TO 16 INCHES...WITH LOCALLY HIGHER AMOUNTS POSSIBLE IN HEAVIER SNOW BANDS WHOSE EXACT LOCATION IS STILL TOO EARLY TO DETERMINE. SNOW MAY MIX WITH OR CHANGE TO RAIN AND SLEET AT THE HEIGHT OF THE STORM LATE SUNDAY NIGHT ACROSS EASTERN LONG ISLAND...AND POSSIBLY ACROSS COASTAL SOUTHEAST CONNECTICUT...WHICH COULD HOLD DOWN AMOUNTS THERE...BUT ONLY AFTER SIGNIFICANT ACCUMULATIONS HAVE ALREADY TAKEN PLACE.* IMPACTS...EXTREMELY DANGEROUS TRAVEL CONDITIONS DEVELOPING DUE TO SIGNIFICANT SNOW ACCUMULATIONS...AND STRONG WINDS CAUSING CONSIDERABLE BLOWING AND DRIFTING OF SNOW. VISIBILITIES WILL BE NEAR ZERO AT TIMES...WITH WHITEOUT CONDITIONS EXPECTED. STRONG WINDS MAY ALSO DOWN SOME POWER LINES...TREE LIMBS...AND CHRISTMAS DECORATIONS.* TIMING...LIGHT SNOW WILL LIKELY BEGIN DURING SUNDAY MORNING...THEN BECOME HEAVY AT TIMES FROM LATE SUNDAY AFTERNOON INTO MUCH OF SUNDAY NIGHT. LIGHT SNOWS WILL LIKELY LINGER INTO MONDAY MORNING AND POSSIBLY INTO MONDAY AFTERNOON.* WINDS....DURING THE HEIGHT OF THE STORM SUNDAY NIGHT...NORTH WINDS WILL INCREASE TO 20 TO 35 MPH WITH GUSTS 40 TO 55 MPH...HIGHEST ACROSS CENTRAL AND EASTERN LONG ISLAND.PRECAUTIONARY/PREPAREDNESS ACTIONS...A BLIZZARD WARNING MEANS SEVERE WINTER WEATHER CONDITIONS AREEXPECTED OR OCCURRING. FALLING AND BLOWING SNOW WITH STRONGWINDS AND POOR VISIBILITIES ARE LIKELY. THIS WILL LEAD TO WHITEOUTCONDITIONS...MAKING TRAVEL EXTREMELY DANGEROUS. DO NOT TRAVEL. IFYOU MUST TRAVEL...HAVE A WINTER SURVIVAL KIT WITH YOU. IF YOU GETSTRANDED...STAY WITH YOUR VEHICLE.&&

$

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Just issued an update for NBCPHILADELPHIA.COM a few minutes ago...

The highlights....

Category 5 (crippling) on our Winter Storm Scale that goes from 1 to 5

10-20 inches for much of the Philadelphia area, with 20"+ toward NYC and Long Island

Snow 2-3 inches per hour at the peak Sunday evening DURING the Eagles game! (Thunder possible, too)

Near-blizzard conditions during the evening and late night

And it's in a relatively strong La Nina. WOW!

Glenn

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Just issued an update for NBCPHILADELPHIA.COM a few minutes ago...

The highlights....

Category 5 (crippling) on our Winter Storm Scale that goes from 1 to 5

10-20 inches for much of the Philadelphia area, with 20"+ toward NYC and Long Island

Snow 2-3 inches per hour at the peak Sunday evening DURING the Eagles game! (Thunder possible, too)

Near-blizzard conditions during the evening and late night

And it's in a relatively strong La Nina. WOW!

Glenn

Just wanted to say that I think it's great that not only have you been warning the public much earlier with your analysis the last few days. It's also very delightful to see you reaching out to the net as well, with the fb/twitter posts. I still think a lot of the public is really unaware of what's about to happen.

Also, first post here, but been lurking for awhile. Great place you guys have here.

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It may be just me, but I do recall every big storm where there were initial calls for ~12 inches, has almost always trended upwards as the event got underway. I wasn't here for 1996, but I remember this being the case for the Presidents Day Storm in 2003, and of course all of last years Snowpocolpyse and Snowmegeddon fun. I'm going to go out on a limb here and say totals will continue to rise even as the event gets underway.....Question is, by how much?

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Just wanted to wish you guys good luck and enjoy the snowfall! wish I was home to celebrate with you guys(though I should fair well up here :lol:) but man what a turn around in the last 24 hours. when I left thursday, I almost left my car in the street but decided against it just in case the small chance it would hit us. good thing i did.. well enjoy and cheers everyone!drunk.gif

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Just issued an update for NBCPHILADELPHIA.COM a few minutes ago...

The highlights....

Category 5 (crippling) on our Winter Storm Scale that goes from 1 to 5

10-20 inches for much of the Philadelphia area, with 20"+ toward NYC and Long Island

Snow 2-3 inches per hour at the peak Sunday evening DURING the Eagles game! (Thunder possible, too)

Near-blizzard conditions during the evening and late night

And it's in a relatively strong La Nina. WOW!

Glenn

I had already resigned myself to not having a decent winter due to the La Nina...this is epic!

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