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ChescoPaWxman

January 29, 2019 Snow Event and January 30th Snow Squall Discussion and Obs

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This cold definitely means business. 6.4F here currently, how low can we go? Forecast here is for 3F, seems like 0F might be within reach. 

eta: 4.3F at 11:10 pm

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Very unlikely and difficult in the relatively higher spots in this area to record below zero readings....We usually need strong cold air advection and never get any benefit of radiational cooling. To highlight here in NW Chester County at 650 ft ASL we have only experienced 3 days with a below zero readings in the last 23 years since 1996. Below are the only 3 days we have touched below zero.

1/24/11 - (1-2)

1/7/14  - (1.6)

1/22/14 - (1.0)

That said at 10:18 pm local we are already down to 2.5 above zero with a DP of 8.6 below zero - with an almost 4" snow cover so it is certainly possible but I would not be surprised if we stay just barely above zero by tomorrow AM - I will call the low at 0.2 above

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3.7F here at 11:30 pm. Normally when it gets this cold around here there's not too much breeze involved, but there is still a bit of it tonight, and it adds new meaning to "wind chill". No sitting out on the porch tonight!

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Well we did it made it down to 4.8 degrees below zero (see below) - the lowest temperature in almost 23 years since the 5 below recorded back on February 6, 1996 and a new daily record low for the date beating the old record low set way back 114 years ago when it hit 4 below zero on this date in 1905. It looks some lower spots nearby like in Elverson are at 11 below and at lake level at Marsh Creek almost 10 below. Impressive cold for sure! 

2019-01-31_7-06-26.jpg

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11F for the low here. Cold for sure but had colder in January, 2018: 10F on the 6th and 7F on the 7th. Both were just after 7am. Way it goes.

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