mitchnick Posted January 5, 2012 Share Posted January 5, 2012 there's less than 100mb with the RH below 40% http://weather.unisys.com/upper_air/skew/skew_KIAD.txt Link to comment Share on other sites More sharing options...
Solo2 Posted January 5, 2012 Share Posted January 5, 2012 Meh. Link to comment Share on other sites More sharing options...
chris87 Posted January 5, 2012 Share Posted January 5, 2012 i think people are generally happy perpetuating myths (dew points too low etc) that fit their story. it will snow with RH 40+.. it happens plenty. most every storm starts with some virga. this is a crappy vort.. if lwx would switch out of clear air mode radar would look pretty poor. very true, and when you have ~30 to 42% RH in the bottom 150 mb you won't get much to reach the ground given the weak forcing. Link to comment Share on other sites More sharing options...
Ian Posted January 5, 2012 Share Posted January 5, 2012 meanwhile this first batch seems to have done basically what 12z nam showed.. band is getting better organized heading east. we're getting a few flakes now here. Link to comment Share on other sites More sharing options...
Herb@MAWS Posted January 5, 2012 Share Posted January 5, 2012 here's that "super band" almost right over me now!!! http://www.marylandw...m/klwxmetro.php That band has been doing a pretty good number here on the east side of Columbia. Link to comment Share on other sites More sharing options...
nw baltimore wx Posted January 5, 2012 Share Posted January 5, 2012 That band has been doing a pretty good number here on the east side of Columbia. Dusting? Link to comment Share on other sites More sharing options...
Ian Posted January 5, 2012 Share Posted January 5, 2012 very true, and when you have ~30 to 42% RH in the bottom 150 mb you won't get much to reach the ground given the weak forcing. DC has been 40+ all day or at least since midday... it's marginal but we did not virga that much here considering how little snow is falling. i guess further north it might be more of an issue.. but the dew point talk is at least slightly misguided. it can snow with dew points of 0. Link to comment Share on other sites More sharing options...
chris87 Posted January 5, 2012 Share Posted January 5, 2012 there's less than 100mb with the RH below 40% http://weather.unisy...w/skew_KIAD.txt look at 810 mb...that's cloud base...you have light snow fall out of cloud base into a 150 mb deep layer of sub 45% RH, hence flurries after 45 minutes of virga Link to comment Share on other sites More sharing options...
chris87 Posted January 5, 2012 Share Posted January 5, 2012 DC has been 40+ all day... it's marginal but we did not virga that much here considering how little snow is falling. i guess further north it might be more of an issue.. but the dew point talk is at least slightly misguided. it can snow with dew points of 0. it's all about RH...we had virga here in Silver Spring for about 45 minutes before spotting a few mangled flakes. Link to comment Share on other sites More sharing options...
WxUSAF Posted January 5, 2012 Share Posted January 5, 2012 Dusting? I've got a full on dusting here. Link to comment Share on other sites More sharing options...
Ian Posted January 5, 2012 Share Posted January 5, 2012 it's all about RH...we had virga here in Silver Spring for about 45 minutes before spotting a few mangled flakes. i agree.. i've been repeating that for hours. the bigger issue here is forcing as it seems you agree. i just get miffed with "right for the wrong reasons" stuff. Link to comment Share on other sites More sharing options...
Herb@MAWS Posted January 5, 2012 Share Posted January 5, 2012 I've got a full on dusting here. Ditto -- sticking to sidewalks, on the street and car tops. Link to comment Share on other sites More sharing options...
mitchnick Posted January 5, 2012 Share Posted January 5, 2012 I've got a full on dusting here. official "coating" here, and jealously working on the season's first dusting Link to comment Share on other sites More sharing options...
chris87 Posted January 5, 2012 Share Posted January 5, 2012 i agree.. i've been repeating that for hours. the bigger issue here is forcing as it seems you agree. i just get miffed with "right for the wrong reasons" stuff. dude just to make sure, i'm not arguing with you...i just jumped into the convo... Link to comment Share on other sites More sharing options...
Ian Posted January 5, 2012 Share Posted January 5, 2012 dude just to make sure, i'm not arguing with you...i just jumped into the convo... i know on a side note: short term forecasting on the whole is pretty bad in this area Link to comment Share on other sites More sharing options...
Jebman Posted January 5, 2012 Share Posted January 5, 2012 Maryland is always the best place for snow Link to comment Share on other sites More sharing options...
chris87 Posted January 5, 2012 Share Posted January 5, 2012 i know on a side note: short term forecasting on the whole is pretty bad in this area yeah i agree...i grew up in a place that got over a 100" a year and here I am watching 15 flakes fly outside my window... Link to comment Share on other sites More sharing options...
Jebman Posted January 5, 2012 Share Posted January 5, 2012 you need vertical motion and moisture to get precipitation...tonight we barely had either. Once we get temps well above freezing - we'll have plenty of both. Link to comment Share on other sites More sharing options...
Kmlwx Posted January 5, 2012 Share Posted January 5, 2012 Still snowing very lightly here despite me being past the back edge on GR Analyst. Nothing sticking to the front walk. Are there signs of round 2? I don't see any on radar. Link to comment Share on other sites More sharing options...
mitchnick Posted January 5, 2012 Share Posted January 5, 2012 Once we get temps well above freezing - we'll have plenty of both. +1,000 Link to comment Share on other sites More sharing options...
Ian Posted January 5, 2012 Share Posted January 5, 2012 Still snowing very lightly here despite me being past the back edge on GR Analyst. Nothing sticking to the front walk. Are there signs of round 2? I don't see any on radar. Not much maybe a few micro spots in Ohio. That vort intensifies as it moves tho. But last few runs of the NAM don't really show anything with it. Link to comment Share on other sites More sharing options...
Avdave Posted January 5, 2012 Share Posted January 5, 2012 Not much maybe a few micro spots in Ohio. That vort intensifies as it moves tho. But last few runs of the NAM don't really show anything with it. CAK is the only official stations reporting S- in the entire state, talk about uber micro spots Link to comment Share on other sites More sharing options...
Jebman Posted January 5, 2012 Share Posted January 5, 2012 I see no snow falling here but I did notice a few extremely small snow grains on the car top we're really hard up for winter wx this season Link to comment Share on other sites More sharing options...
lester Posted January 5, 2012 Share Posted January 5, 2012 BWI reporting light snow Link to comment Share on other sites More sharing options...
MN Transplant Posted January 5, 2012 Share Posted January 5, 2012 Streetlight flurries, sparse at that. And we are at the high of the day. Link to comment Share on other sites More sharing options...
ThePhotoGuy Posted January 5, 2012 Share Posted January 5, 2012 Flurries Link to comment Share on other sites More sharing options...
Avdave Posted January 5, 2012 Share Posted January 5, 2012 2012/01/05 02:31 KBWI 050231Z 00000KT 8SM -SN FEW025 OVC031 M01/M11 A3002 RMK AO2 SNB30 P0000 Link to comment Share on other sites More sharing options...
Ian Posted January 5, 2012 Share Posted January 5, 2012 Bands east of here looking almost good Link to comment Share on other sites More sharing options...
mitchnick Posted January 5, 2012 Share Posted January 5, 2012 I'd say we've made it up to an official dusting still seady, light snow pleasant surprise that would have gone unnoticed in a "normal" winter Link to comment Share on other sites More sharing options...
mitchnick Posted January 5, 2012 Share Posted January 5, 2012 I hope my children remember this night http://www.atmos.albany.edu/products/radarne/radarloop.htm Link to comment Share on other sites More sharing options...
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