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The feb 4-5 storm (Obs/Discussions)


Ji

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only because it was the model that showed essentially no snow

every model forecast that has shown no snow 36 hrs+ has been right, whether the GFS or EC

i think it will end up having been fairly consistent in its idea for almost 3 days when all is said and done.. other models were bouncing wildly still in that period. why the cmc got 100 posts of commentary is still unknown.

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Rain mixing in with a very few wet flakes in HGR.

Temp: 36

I noticed the airport was reporting -SN at the top of the hour... would it really be all snow, or do you think it should be more of a mix at that location?

KHGR 041853Z 04004KT 3SM -SN BR OVC025 02/00 A3018 RMK AO2 RAE19UPB19E46SNB46 SLP238 P0000 T00220000

EDIT: Nevermind... new ob shows it's been bouncing around quite a bit:

KHGR 041937Z 05003KT 3SM -SN BR FEW007 OVC025 02/00 A3018 RMK AO2 UPB1858E11RAB11E35SNE1858B35 P0001

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Sky has taken on a discernably more wintry look in last 1-2 hrs as clouds lower. Breeze occasionally kicking up gives a slight nip to the air.

Sky is slate gray – difficult to tell which way the lowest clouds are moving. Only less-gray part of sky is a sliver off to the S&SE.

Light rain dampening the ground. Breeze out of N-NE.

Temps seemed to have leveled off at 42.1

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12z had a high of 44 at DCA...it's 45 now...the good news is that the models seems to have been too high with dewpoints, which is probably more important

MOS (both nam and gfs) was down into the mid-40 to 50 by 0z last night tho i don't recall specifics. was 50+ prior.

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MOS less than 48 hours ago was 52.

that's interesting and good proof why one doesn't use a 48 hour forecast to nowcast....and if I remember correctly 48 hours ago had some breaks in the cloud cover during early portions of today, thus why MOS was probably a bit higher....you get in to the 950 mb to 850 mb layer and the GFS forecasts from 48 hours were much more in line...

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