snowfan Posted February 21, 2015 Author Share Posted February 21, 2015 HTF is there an obs thread 20 hours before the storm? Every MF'r wants their name on a thread now. Ridiculous. Hmmm....People suggested it in the model thread. Drink more!4 at BWI Link to comment Share on other sites More sharing options...
StudentOfClimatology Posted February 21, 2015 Share Posted February 21, 2015 7.6/0 here, pretty much stable now. This area radiates very well..drive 5 miles east and the temp can jump quite a bit. Link to comment Share on other sites More sharing options...
mitchnick Posted February 21, 2015 Share Posted February 21, 2015 anybody ever see a "Low Water Advisory" for the Bay? not me http://www.weather.gov/lwx/ http://forecast.weather.gov/showsigwx.php?warnzone=ANZ630&warncounty=marine&firewxzone=&local_place1=6NM%20SSE%20Reedville%20VA&product1=Low+Water+Advisory&lat=37.7615&lon=-76.1998#.VOgO3S6rGRo I understand why, but have just never seen one before Link to comment Share on other sites More sharing options...
Ian Posted February 21, 2015 Share Posted February 21, 2015 I'm issuing a nice sunrise watch effective until I see nice sunrise pics when I wake up well after sunrise. Link to comment Share on other sites More sharing options...
WVsnowlover Posted February 21, 2015 Share Posted February 21, 2015 13 degrees here which seems odd considering other obs. Clear skies and calm winds. Link to comment Share on other sites More sharing options...
WEATHER53 Posted February 21, 2015 Share Posted February 21, 2015 anybody ever see a "Low Water Advisory" for the Bay? not me http://www.weather.gov/lwx/ http://forecast.weather.gov/showsigwx.php?warnzone=ANZ630&warncounty=marine&firewxzone=&local_place1=6NM%20SSE%20Reedville%20VA&product1=Low+Water+Advisory&lat=37.7615&lon=-76.1998#.VOgO3S6rGRo I understand why, but have just never seen one before The blowouts but aslo the cold contracting water? Link to comment Share on other sites More sharing options...
BaltimoreWxGuy Posted February 21, 2015 Share Posted February 21, 2015 You're already experiencing warm air advection WVsnowlover..out west and higher elevations get WAA faster Link to comment Share on other sites More sharing options...
NotGonnaHappen Posted February 21, 2015 Share Posted February 21, 2015 3/-6 pressure peaked at 1034 even in the past hour, starting to fall off Link to comment Share on other sites More sharing options...
WVsnowlover Posted February 21, 2015 Share Posted February 21, 2015 You're already experiencing warm air advection WVsnowlover..out west and higher elevations get WAA fThat That makes sense, thanks. I'm only at 600' though, and it was 7 degrees about 15 miles north of me at a similar elevation (using car thermo). It was as high as 17 degrees in between the 7 and my 13. Guessing it is wind dependent? Another newbie question, will temps level/average out across the area, or will areas with a colder temp now have a chance of doing a little better tomorrow than areas with a current higher temp? Link to comment Share on other sites More sharing options...
Jebman Posted February 21, 2015 Share Posted February 21, 2015 3/-6 pressure peaked at 1034 even in the past hour, starting to fall off Love your board name LOL! Link to comment Share on other sites More sharing options...
Jebman Posted February 21, 2015 Share Posted February 21, 2015 It was 7 degrees earlier during my jebwalk, but now its up to 11 degrees. Link to comment Share on other sites More sharing options...
StudentOfClimatology Posted February 21, 2015 Share Posted February 21, 2015 That makes sense, thanks. I'm only at 600' though, and it was 7 degrees about 15 miles north of me at a similar elevation (using car thermo). It was as high as 17 degrees in between the 7 and my 13. Guessing it is wind dependent? Another newbie question, will temps level/average out across the area, or will areas with a colder temp now have a chance of doing a little better tomorrow than areas with a current higher temp? The differential will be mixed out tomorrow when we get some insolation and light mixing/extentions within the boundary layer. Link to comment Share on other sites More sharing options...
WVsnowlover Posted February 21, 2015 Share Posted February 21, 2015 The differential will be mixed out tomorrow when we get some insolation and light mixing/extentions within the boundary layer When you say light mixing/extensions, is that caused by the precip? Link to comment Share on other sites More sharing options...
StudentOfClimatology Posted February 21, 2015 Share Posted February 21, 2015 When you say light mixing/extensions, is that caused by the precip? That and general air circulation. Sun heats the surface which conducts to the air just above, which will tend to rise once it's thermokinetic potential surpasses that of air above it (need to adjust for the lapse rate/compressional forcing). Hence the development of vertical eddies (aka mixing). You won't see much mixing until these microscale instabilities develop, or large scale kinetic forcing can erode/mix down into the surface inversion. There are other ways out of an in-situ inversion (like latent heat release in a ZR event), but that won't matter until Saturday/Saturday night. Link to comment Share on other sites More sharing options...
StudentOfClimatology Posted February 21, 2015 Share Posted February 21, 2015 Trying to re-couple here, up to 8.5/1. Link to comment Share on other sites More sharing options...
WVsnowlover Posted February 21, 2015 Share Posted February 21, 2015 That and general air circulation. Sun heats the surface which conducts to the air just above, which will tend to rise once it's thermokinetic potential surpasses that of air above it (need to adjust for the lapse rate/compressional forcing). Hence the development of vertical eddies (aka mixing). You won't see much mixing until these microscale instabilities develop, or large scale kinetic forcing can erode/mix down into the surface inversion. There are other ways out of an in-situ inversion (like latent heat release in a ZR event), but that won't matter until Saturday/Saturday night. Thank you! Link to comment Share on other sites More sharing options...
AvantHiatus Posted February 21, 2015 Share Posted February 21, 2015 Thank you! Trying to re-couple here, up to 8.5/1. Dat wind tho Link to comment Share on other sites More sharing options...
StudentOfClimatology Posted February 21, 2015 Share Posted February 21, 2015 Thank you! Forgot to mention, none of Weatherguy701's posts are worth reading. Link to comment Share on other sites More sharing options...
Deck Pic Posted February 21, 2015 Share Posted February 21, 2015 warming on south winds....15 here, 16 at DCA, 13 at IAD BWI is calm and 4. Link to comment Share on other sites More sharing options...
StudentOfClimatology Posted February 21, 2015 Share Posted February 21, 2015 Same here, 10.1/-1 w/ a light SSE wind. Bottomed out at 6.2 around midnight. Link to comment Share on other sites More sharing options...
clueless Posted February 21, 2015 Share Posted February 21, 2015 9/-5 WC Link to comment Share on other sites More sharing options...
snowfan Posted February 21, 2015 Author Share Posted February 21, 2015 Bwi now at 2.0 at Tipton. DCA at 15 Link to comment Share on other sites More sharing options...
StudentOfClimatology Posted February 21, 2015 Share Posted February 21, 2015 Am up to 12.3/-1 Link to comment Share on other sites More sharing options...
Deck Pic Posted February 21, 2015 Share Posted February 21, 2015 14 IMBY....BWI is still 2 Link to comment Share on other sites More sharing options...
Swiscaster Posted February 21, 2015 Share Posted February 21, 2015 69 and cloudy here. Honolulu. :/ Link to comment Share on other sites More sharing options...
Angela T Posted February 21, 2015 Share Posted February 21, 2015 Made it down to 5 last night. Currently 10 / -2 with a light s/w breeze. Link to comment Share on other sites More sharing options...
foggy Posted February 21, 2015 Share Posted February 21, 2015 Link to comment Share on other sites More sharing options...
aldie 22 Posted February 21, 2015 Share Posted February 21, 2015 8.3 or 12 if you want use JYO Link to comment Share on other sites More sharing options...
wxdude64 Posted February 21, 2015 Share Posted February 21, 2015 First flakes drifting down 10.8/DP 3.7 Link to comment Share on other sites More sharing options...
Jebman Posted February 21, 2015 Share Posted February 21, 2015 First flakes drifting down 10.8/DP 3.7 Congrats! You're gonna get CRUSHED with massive amts of snow Link to comment Share on other sites More sharing options...
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