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December 16-17, 2020 Winter Storm


Ralph Wiggum
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3 hours ago, The Iceman said:

Ask the folks up in NE how the euro did with their last noreaster last week. It and the NAM were showing amped up snow bombs for the interior and the less amped gfs/cmc ruled the roost... And it wasn't even close. Lots of weenies in S.NH and Vermont only saw an inch when the euro/nam were both consistently printing out 12"+ in those areas. They have been consistently over amped in the mid range all fall. 

Same was true for the Maine foothills.  The immediately pre-storm forecast was 12-18 and once the changeover was complete we had all flakes, 6.0" from 1.38" LE - sloppiest significant snow since the mess in late Feb 2010.  However, 5 miles to my SE and 400' higher (800 asl) there was about 10", and 40 miles to my north, Carrabassett Valley was reporting 18" (@ 1300').

Hope you folks get pounded, though my snow-loving grandkids a few miles south of Glassboro probably don't see much.

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Take it for what it's worth, watching ch6 (accu-weather) noon news. They have Philly to Allentown in the 6-10" range then Allentown further 10-15". I'll give them credit for throwing a accumulation map out there but seems a tad low for the Burbs...I think people between Philly/Allentown will see more than 10".

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For reference: Philadelphia’s 30 biggest daily snowfalls:

Maximum 1-Day Total Snowfall 
for Philadelphia Area, PA (ThreadEx)
Click column heading to sort ascending, click again to sort descending.
Rank
Value
Ending Date
Period of record: 1884-10-01 to 2020-12-13
1 27.6 1996-01-07
2 22.5 2009-12-19
3 21.9 2010-02-06
4 21.1 1983-02-11
5 19.4 2016-01-23
6 19.0 1915-04-03
7 16.0 2003-02-16
8 15.5 1909-12-26
9 14.2 2011-01-26
10 13.9 1979-02-19
11 13.5 2014-01-21
12 12.4 1978-02-06
- 12.4 1966-12-24
14 11.9 1935-01-23
15 11.7 1993-03-13
16 11.6 2010-12-26
17 11.0 1902-02-17
18 10.9 1960-12-12
19 10.8 2005-01-22
20 10.6 2006-02-12
21 10.5 1888-03-12
22 10.4 2014-02-13
23 10.0 1900-02-17
- 10.0 1899-02-13
25 9.8 1967-02-07
26 9.6 1958-03-20
27 9.3 2010-02-10
- 9.3 1978-01-20
29 9.2 1945-12-19
- 9.2 1893-01-06
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36 minutes ago, Birds~69 said:

Take it for what it's worth, watching ch6 (accu-weather) noon news. They have Philly to Allentown in the 6-10" range then Allentown further 10-15". I'll give them credit for throwing a accumulation map out there but seems a tad low for the Burbs...I think people between Philly/Allentown will see more than 10".

WGAL in Lancaster being conservative as well.  Going 6-10 for Reading, Harrisburg and Lancaster.  Thought that was kind of conservative 

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1 minute ago, BlueDXer75 said:

WGAL in Lancaster being conservative as well.  Going 6-10 for Reading, Harrisburg and Lancaster.  Thought that was kind of conservative 

We're still 48 hours out. Everywhere is going to be conservative at this stage in the game. Surprised places are throwing totals up yet. Looking good still but we know a lot can change in 24 hours.

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1 minute ago, Wentzadelphia said:

That looks overdone probably up to the city. More sleet would happen imo.

Oh yeah, I mentioned this in another post. The city is definitely overdone with these maps. (cut by 40-50%) But I think once you hit the burbs you'll see some nice totals as of now.....could change. 

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WXSIM backing off a bit on totals with 12z runs only 14" to 19" now....

 Wednesday: Cloudy in the morning, becoming dense overcast in the afternoon. A        slight chance of snow in the morning, then snow likely in the afternoon. High        33. Wind chill around 21. Wind east-northeast around 8 mph, gusting to 16 mph,       in the morning, becoming 11 mph, gusting to 18 mph, in the afternoon. Chance of      precipitation 70 percent. Precipitation (liquid equivalent) mostly around a          quarter of an inch. Snow accumulation 1 to 2 inches.                                                                                                                      Wednesday night: Dense overcast. Snow likely. Breezy. Low 29. Wind chill as low      as 18. Wind east-northeast around 14 mph, gusting to 22 mph. Chance of               precipitation 80 percent. Precipitation (liquid equivalent) mostly around 2          inches. Snow accumulation 12 to 16 inches.                                                                                                                                Thursday: Dense overcast. Patchy light fog. Snow likely in the morning, then a       chance of snow in the afternoon. High 30. Wind chill around 22. Wind northeast       around 6 mph, gusting to 16 mph. Chance of precipitation 70 percent.                 Precipitation (liquid equivalent) mostly around a quarter of an inch. Snow           accumulation about an inch.                                         

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