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2/21-2/23 Weekend Possible Storm


Zelocita Weather

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Huh? The only model that trended less amplified today is the GFS.

Just clarifying that this is not a snow setup for us so there's no weenie undertones here but a mid-range amplification on the CMC and Euro has been happening almost every storm this winter. There's nothing to keep this cold. I just don't buy the amped solutions. My money is on this going flatter and less impressive for basically everyone. We'll see.

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Well if we assume that the models are probably a touch too amplified then we're in for one hell of a rainstorm when the surface low trends a tick southeast over the next few days.

Or maybe initial mid level warmth winds up being less and we get a high qpf slop to rain to slop event - something similar I believe to the GFS from a day or two ago? I think this could still go a few different ways. Hopefully it just stays drier overall I guess.

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From all the guidance looks like this wont do much damage to NE snowpack.

 

Maybe 0.75-1.25" LE, some of that frozen with temps mostly in the 30's with maybe a brief spike to 40-43 for a few hours when most of the precip is done already. 

It can still cause a lot of roof damage as any rain will be absorbed by the snow pack increasing the weight of the snow.

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EXTENDED FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
1046 AM EST WED FEB 18 2015

VALID 12Z SAT FEB 21 2015 - 12Z WED FEB 25 2015


RELIED ON THE FASTER, FLATTER GUIDANCE OVER THE EASTERN UNITED STATES AT THE MEDIUM RANGE THIS FORECAST PACKAGE, WITH DEFERENCE TO THE PRIMACY OF COLD AIR. MUCH AS THE MODELS THIS TIME LAST WEEK
WERE WONT TO LIFT THE CURTAIN OF ARCTIC AIR IN THE EAST TO ALLOW A SURFACE LOW TO PASS WEST OF THE APPALACHIANS FOR THE TIME FRAME VERIFYING YESTERDAY AND TODAY--WITH A FLATTER, COLDER WAVE THE
REALITY--BELIEVE THAT A SIMILAR ISSUE EXISTS FOR THE WAVE CROSSING THE EAST THIS SATURDAY NIGHT INTO SUNDAY. 
LEANED ON THE MSC MEAN--CANADIAN ENSEMBLE MEAN--AS A SYNOPTIC GUIDE FOR THE NATION
THROUGHOUT THE PERIOD. A TEMPORARY DIP IN THE JET OVER THE WESTERN STATES WILL HELP TO URGE THE CLOSED LOW WEST OF BAJA NORTHWARD--THE EFFECTS OF BOTH SYSTEMS PRODUCING PRECIPITATION FROM SOUTHERN CALIFORNIA TO THE CENTRAL HIGH PLAINS. ONCE THE ENERGY OVER THE SOUTHWEST ROCKETS EAST-NORTHEASTWARD NEXT TUESDAY AND WEDNESDAY, ANOTHER OVERRUNNING EVENT OF WINTRY PRECIPITATION
IS POSSIBLE FOR PARTS OF THE DEEP SOUTH, WITH MORE SNOW POSSIBLE OVER THE PIEDMONT AND ENTIRE ATLANTIC COASTAL PLAIN NORTH OF THE CAROLINAS.


CISCO

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Basically the extended forecast discussion says don't pay attention to any model except the JMA or NAM. That's a bit suspect...they are the professionals though.

I still can't rule out the possibility that the models make huge shifts in the next couple of days. This last storm was modeled as a cutter 5 or so days out and ultimately went mostly out to see.

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