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Storm Threat Dec 26-28 Period


Ralph Wiggum

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From the DC crowd forum:

Here in SE DC, we are back to mostly, if not all snow. It went from snow around 630am, to rain/sleet by 800am. Now the snow!

Sounds like the cold air is doing battle down there.

Cold air always has a hard time getting out in these types of storms.

Latest HRRR has 8-12" for the Lehigh Valley btw, which I wish would happen but it's definitely overdoing it. Cut those amounts in half and that's probably closer.

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Cold air always has a hard time getting out in these types of storms.

Latest HRRR has 8-12" for the Lehigh Valley btw, which I wish would happen but it's definitely overdoing it. Cut those amounts in half and that's probably closer.

unfortunately, that is only true at the very lowest levels. I can imagine the 700-850mb levels are screaming WAA. Cut those amounts by 75% and you have an answer I'd say.

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...SNOW AND RAIN WILL MOVE NORTHEASTWARD THROUGH THE REGION THIS MORNING...

A WINTRY MIX OF SNOW AND RAIN, POSSIBLY MIXING WITH SOME SLEET, WILL SPREAD NORTHEASTWARD ACROSS THE REGION THIS MORNING. WHERE MAINLY SNOW FALLS, EXPECT AROUND A HALF AN INCH OF SNOW ACCUMULATION. TEMPERATURES ARE GENERALLY IN THE LOW TO MID 30S ACROSS THE REGION AND WILL GRADUALLY WARM OVER THE NEXT COUPLE OF HOURS. PERIODS OF HEAVIER PRECIPITATION WILL CAUSE VISIBILITIES TO DROP AND ROADWAYS TO BECOME SLIPPERY. EXERCISE CAUTION IF VENTURING OUT TODAY AND ALLOW FOR EXTRA TRAVEL TIME.

Temps in the mid 30s? Not in Berks County

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Well, now that this event is upon us, after looking over the data I can say that a bit of frozen at the start appears likely here at TTN. I could see several inches, but at this point I think the best forecast here is a coating to 2 inches, or "around an inch", on Wednesday.

thats rather bullish coming from you

Bullish? I only forecast what I expect. I've got a perfect record here so far this season ;) (though the first one was admittedly right for the wrong reasons).

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http://www.americanw...25#entry1945838

Bullish? I only forecast what I expect. I've got a perfect record here so far this season ;) (though the first one was admittedly right for the wrong reasons).

you are one of the few that I pay attention to when they post. You do not hype and are often the voice of reason that cuts through much of the snow weenieism. With Mt Holly not calling for really anything for this area, I am taking notice of your call. Im a bit to the north of your parents in Belle Mead so I will keep an eye out as we may have to do some light salting and plowing if we get an inch or so

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you are one of the few that I pay attention to when they post. You do not hype and are often the voice of reason that cuts through much of the snow weenieism. With Mt Holly not calling for really anything for this area, I am taking notice of your call. Im a bit to the north of your parents in Belle Mead so I will keep an eye out as we may have to do some light salting and plowing if we get an inch or so

Thanks for the kind words. I've been wrong before, though.

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Latest forecast ouput from Wxsim with 12z data for NW Chesco - the current temp is running about 1.1 degrees below forecast

DATE TIME TEMP WIND R.HUM %SC %VST VIS PC/HR RN TOT WEATHER

Dec 26 12:00 P 28.1 5 84 89 36 18.0 3 0.00 CLOUDY

SURFACE WIND NOW FROM NNE

SURFACE WIND NOW FROM ENE

Dec 26 1:00 P 29.0 10 84 100 19 0.8 3 0.04 DNS.OVCST LIGHT SNOW

Dec 26 2:00 P 29.3 14 85 100 13 7.0 4 0.07 DNS.OVCST LT. SLEET

Dec 26 3:00 P 29.2 16 90 100 9 1.1 4 0.38 DNS.OVCST HVY. SLEET

Dec 26 4:00 P 29.4 17 91 100 13 18.0 4 0.57 DNS.OVCST

Dec 26 5:00 P 29.6 18 91 100 13 18.0 5 0.61 DNS.OVCST

Dec 26 6:00 P 30.6 20 93 100 9 1.5 5 0.93 DNS.OVCST ICE STORM

Dec 26 7:00 P 31.0 23 95 100 15 18.0 5 1.12 DNS.OVCST CH. FRZ.RN

Dec 26 8:00 P 31.4 23 94 100 18 18.0 5 1.15 DNS.OVCST CH. FRZ.RN

Dec 26 9:00 P 32.6 22 94 100 17 3.4 4 1.30 DNS.OVCST MOD. RAIN

Dec 26 10:00 P 33.3 20 93 100 27 18.0 4 1.39 DNS.OVCST

Dec 26 11:00 P 33.7 18 92 100 30 17.9 4 1.42 CLOUDY

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