Dec 29-30, Jan 2-3 Eastern US Winter Storms (2013, cities, blizzard)
Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
NOTING TWO PIECES OF UPPER LEVEL ENERGY...ONE MOVING OUT OF THE
CANADIAN ROCKIES AND A SECOND EXPECTED TO GATHER STRENGTH OVER THE
NORTHERN GULF OF MEXICO. EXPECT THESE TO DEVELOP LOW PRES MOVING
OFF THE OUTER BANKS OF NC LATE THU/THU NIGHT...THEN WILL TRACK
ABOUT 200 MILES S-SE OF NANTUCKET /SOUTH OF THE 40N/70W
BENCHMARK/.
THE ECMWF HAS DEFINITELY TRENDED TOWARD THE OPERATIONAL GFS AND WPC PREFERRED A BLEND OF THE 12Z GFS/ECMWF FOR THE HEAVY SNOW PROBS. THIS MEANS A
COUPLE OF DIFFERENT HEAVY SNOW SWATHS... ONE FROM NERN OH/NWRN PA
TO COASTAL NH/MA AND ANOTHER FROM SOUTH CENTRAL MO TO SRN IN/SWRN
OH.
THE AMPLIFIED UPPER TROUGH AXIS EXTENDING FROM THE GREAT LAKES TO
ERN GULF COAST WILL SWEEP TO THE EAST COAST ON FRI BEFORE PHASING
OFFSHORE OF THE MID-ATL REGION WITH THE ACTIVE SRN BRANCH. THE
RESULTANT WILL BE A DEVELOPING SURFACE LOW WHICH WILL GO THROUGH
RAPID INTENSIFICATION... WHILE ALSO THREATENING THE NORTHEAST/NRN
MID-ATL STATES WITH HEAVY SNOW. WPC STAYED VERY CLOSE TO A BLEND
OF THE OPERATIONAL GFS/ECMWF... WHICH WILL CONTINUE THE BROAD
OVERRUNNING SHIELD OF LIGHT TO MDT SNOW TO TRACK FROM THE
NRN/CENTRAL APPALACHIANS TO THE DELMARVA COAST... AS A DEVELOPING
DEFORMATION ZONE ATTEMPTS TO DEVELOP AND CLIP THE COASTAL
DELMARVA/SRN NEW ENGLAND.
IT APPEARS AT THIS MOMENT... MORE OF A WIDESPREAD FROZEN PRECIP
EVENT FROM THE CENTRAL PLAINS/MID MS VLY TO SRN NEW ENGLAND/NRN
MID-ATL REGION WITH ONLY ISOLATED HEAVY SNOWFALL AMOUNTS. HOWEVER
WITH MULTIPLE STREAMS...THE POTENTIAL IS STILL THERE FOR A
POSSIBLE LARGER AND MORE SIGNIFICANT SYSTEM WITH HEAVIER SNOW
This is for ISP on Long Island NY. It's not moist all the way up the atmosphere, I bet you that's because of the Arctic air in place. But the mid and lower levels are moist enough for the snow to be falling.
11am Temps and some snow metars. Pretty much snowing in the single digits to 20s in a line from Nebraska to PA. Reports of 1-4" along that line already
Basically a lake effect bulls eye over O'Hare and the Northside of Chicago
Quote:
the latest Weather Service high-res 4km WRF model. Note that the WRF depiction assumes a 10 to 1 snow/water ratio. In reality, this situation is expected to produce something closer to a 16 to 1 ratio. That means actual snowfall could end up as much as 1.6 times as much as this WRF depiction suggests.
Water ratio at 16 to 1 might mean snow total over 14" in heaviest locations.
Please register to post and access all features of our very popular forum. It is free and quick. Over $68,000 in prizes has already been given out to active posters on our forum. Additional giveaways are planned.
Detailed information about all U.S. cities, counties, and zip codes on our site: City-data.com.
Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
