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2/21-2/23 Weekend Possible Storm


Zelocita Weather

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So posting what tv mets are saying are not allowed here and deleted but amateur weenies posting their inflated totals are allowed...got it. Its rude that my post was deleted because it seems selective when banter is allowed here all time

Because this isnt the vendor thread. Stop whining and post in the correct thread.

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after the initial batch comes through, there looks to be quite few dry slots...should still reach advisory level snowfalls around NYC, but for once I whole-heatedly agree with Upton - 2-4 was the correct call

The dry areas will all go well to the north and west the heavy echoes near DC will turn up the coast

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Upton update at about 10 something this morning

NEAR TERM /THROUGH SUNDAY/...

-- Changed Discussion --

SNOW RAPIDLY DEVELOPING INTO CENTRAL AND EASTERN PA THIS

MORNING...AND SHOULD BE ENTERING AREAS WEST OF THE HUDSON EARLY

THIS AFTERNOON...THEN SPREADING EASTWARD THROUGH THE MID TO LATE

AFTERNOON. SNOW SHOULD BECOME MODERATE TO LOCALLY HEAVY A COUPLE

OF HOURS AFTER ONSET...LATE AFTERNOON INTO EARLY EVENING WITH

SNOWFALL RATES UP TO 1 INCH PER HOUR.

THE FORECAST CHALLENGES ARE HOW FAST DOES A LOW LEVEL WARM NOSE

FROM AROUND 875-975 HPA MOVE IN AND DEGREE OF SHALLOW COLD AIR

GETTING LOCKED IN AT THE SURFACE AS COASTAL FRONT/WARM FRONT

APPROACH TONIGHT. 12Z NAM AND SBU/ALY WRF INDICATING A WEAK MESO-

LOW DEVELOPING ALONG THE WARM FRONT OVER OR JUST SOUTH OF

LI...WHICH WOULD PROMOTE TRAPPING OF SUB-FREEZING SURFACE AIR DOWN

INTO AT LEAST NORTHERN PORTIONS OF LI AND NYC METRO AND POINTS N

AND W TONIGHT. IF TRENDS HOLDS WITH 12Z GUIDANCE...A BIT MORE

FREEZING RAIN/ICE ACCUM MAY BE NEEDED AND FURTHER SOUTH FOR TONIGHT

WITH AFTERNOON FORECAST UPDATE.

ANOTHER MODEL TREND IS THAT THE PRECIPITATION SHOULD COME TO AN

END FAIRLY RAPIDLY ON SUNDAY FROM NW TO SE...BASED ON A FASTER

TIMING OF THE COLD FRONT MOVING THROUGH.

ANOTHER TREND IS REDUCE SLIGHTLY THE OVERALL QPF...AND TO SUGGEST

THAT THE AXIS OF HEAVIEST QPF WILL RUN FROM NE NJ INTO SW CT.

BASED ON THIS SHIFT IN THE AXIS OF HEAVIEST QPF TO THE EAST...

WINTER WEATHER ADVISORIES CONTINUE FOR THE ENTIRE AREA.

AS FOR SNOW...GENERAL EXPECTATION IS A 1 TO 4 INCH SNOWFALL ACROSS

NYC/LONG ISLAND...AND A 3-7 INCH SNOWFALL ELSEWHERE...HEAVIEST

ACROSS INTERIOR PORTIONS OF S CT.

AS FOR ICE...THERE WILL LIKELY BE A BAND OF A TENTH...POSSIBLY

2 TENTHS...OF AN INCH OF ICE IN A CORRIDOR RUNNING FROM NE NJ...NORTHEN

PORTIONS OF NYC METRO/LI INTO SW CT...AND UP TO A GLAZE TO A FEW

HUNDREDTHS OF AN INCH ICE ELSEWHERE.

TEMPERATURES FROM LATE THIS AFTERNOON THROUGH TONIGHT...WERE

BASED ON THE WET BULB OF AN AVERAGE OF AVAILABLE GUIDANCE

TEMPERATURES AND THEIR DEW POINTS. HIGHS SUNDAY WERE BASED ON A

BLEND OF MAV/MET/ECS GUIDANCE WITH NAM 2-METER TEMPERATURES. THESE

SHOULD OCCUR MAINLY IN THE MORNING...WITH TEMPERATURES STEADY OR

SLOWLY FALLING IN THE AFTERNOON IN THE WAKE OF THE COLD FRONT.

-- End Changed Discussion --

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Before anyone goes cliff diving because of the radar...models don't bring the thump in until 4-5pm...

Yeah the HRRR clearly showed this band hitting the philly area and EPA pretty hard before weakening as it works its way into NJ. More snow will be coming through to follow, and although EPA will see higher totals, we will still get our few inches or so in the NYC area. Again, I still think it's a 2-4" snowfall for the NYC/NENJ area with the 5-6" amounts further S and W. The forecasts of 4-8" for our areas are overdone (just in my opinion), unless we're factoring in EPA/WNJ. If it looks like a 3 or 4 inch snowfall, no reason to spread it out into the 4-8" range (because if I doubt we'd ever call for 1-3" if we were expecting 4-6") . Upton's call looks perfectly fine for what is expected and modeled.
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