yoda Posted March 16, 2014 Share Posted March 16, 2014 Thanks phil882 for that post... and HM.. shhh Link to comment Share on other sites More sharing options...
Ltrain Posted March 16, 2014 Share Posted March 16, 2014 39/18 Severna Park. Flurries have started. Link to comment Share on other sites More sharing options...
aldie 22 Posted March 16, 2014 Share Posted March 16, 2014 33 flakes a little bigger Link to comment Share on other sites More sharing options...
dukeblue219 Posted March 16, 2014 Share Posted March 16, 2014 44 now with the lightest of flurries just starting. Tiny, tiny flakes. Link to comment Share on other sites More sharing options...
Bob Chill Posted March 16, 2014 Share Posted March 16, 2014 still light flurries but dropped 2 degrees since it started. 38. only 6 degrees to go.... 10pm? Link to comment Share on other sites More sharing options...
T. August Posted March 16, 2014 Share Posted March 16, 2014 Perhaps something is wrong with my station. Dew point is 9 lol... Link to comment Share on other sites More sharing options...
Inudaw Posted March 16, 2014 Share Posted March 16, 2014 45 Degrees and sleeting in Richmond... though it is down to 43.9 now. Did not expect sleet this early honestly. Link to comment Share on other sites More sharing options...
aldie 22 Posted March 16, 2014 Share Posted March 16, 2014 Hello deck and grill cover...it has been a few weeks Link to comment Share on other sites More sharing options...
SomeguyfromTakomaPark Posted March 16, 2014 Share Posted March 16, 2014 Temps dropping fast, down from 47 at 245 to 42 now. Seems like with darkness/dynamic cooling we should be accumulating before midnight. Link to comment Share on other sites More sharing options...
phil882 Posted March 16, 2014 Share Posted March 16, 2014 You're way off base here...this is 3/3 all over again. Haha... while this event does possess some passing similarities to what happened a few weeks ago, I think the key difference here is that the extensive southern stream shortwave is quite a bit stronger (and isn't really weakening as quickly as 3/3's event). Thus, we won't see the ageostrophic forcing weaken as quickly as it did with that event. I think northern VA is going to do very nicely with this event. Unfortunately for those further south, it looks like a significant MCS is robbing mid-level moisture transport into the Carolinas and so beyond the frontogenetical forcing across northern and central VA, the rates further south could be lower, and that combined with marginal thermodynamics might really hamper significant accumulations south of I-64 Link to comment Share on other sites More sharing options...
Ian Posted March 16, 2014 Share Posted March 16, 2014 5p wetbulbs.. of course we couldn't reach that in reality but as temps fall so will the floor. Link to comment Share on other sites More sharing options...
NorthArlington101 Posted March 16, 2014 Share Posted March 16, 2014 Hello deck and grill cover...it has been a few weeks Pics or it didn't happen. :wink: Light flurries starting, 39. Link to comment Share on other sites More sharing options...
hosj III Posted March 16, 2014 Share Posted March 16, 2014 Is anyone raining? Link to comment Share on other sites More sharing options...
Deck Pic Posted March 16, 2014 Share Posted March 16, 2014 41/24 flurries Link to comment Share on other sites More sharing options...
Herb@MAWS Posted March 16, 2014 Share Posted March 16, 2014 Not reaching the ground here yet, but it's obviously close as the planes flying into BWI are being obscurred as they descend. Kinda neat actually Noticed some snow grains and flurries around 4:30 Then it stopped for a bit. Very light snow now. Temp down from 45 to 39. Link to comment Share on other sites More sharing options...
MetalCapsFan Posted March 16, 2014 Share Posted March 16, 2014 41 deg here in B'more, tiny snow flakes gently floating towards the ground Link to comment Share on other sites More sharing options...
das Posted March 16, 2014 Share Posted March 16, 2014 Just went below freezing at 5:15pm, now at 31.8°F in Clarksburg. Hair more than light snow, starting to stick on grassy surfaces. Link to comment Share on other sites More sharing options...
aldie 22 Posted March 16, 2014 Share Posted March 16, 2014 Just hit freezing at 5:30 Link to comment Share on other sites More sharing options...
phil882 Posted March 16, 2014 Share Posted March 16, 2014 The tiny flakes should be expected at the very beginning of the event. In these CAD cases the low-level column is very dry at first, so the snow that does reach the ground at first has almost completely sublimated (helping to both cool the column as it transfers moisture from the snowflake into the drier atmosphere). Watch the flake size start to increase steadily as the forcing increases, the column moistens up and the temperature drops to freezing or below. Cloud top heights are between 235-245K (-38 to -28 C) so we know that there is moisture well up into the dendritic snow growth zone (-12 to -18C) so there is nothing to worry about as long as forcing for ascent continues up to this level. Link to comment Share on other sites More sharing options...
shoshanaz Posted March 16, 2014 Share Posted March 16, 2014 Seeing the first few light flakes in Pikesville, MD. About 38 degrees. Link to comment Share on other sites More sharing options...
EastCoast NPZ Posted March 16, 2014 Share Posted March 16, 2014 No stickage on hard surfaces, but 1/2" so far on the grass and elevated surfaces. Snow started quickly at 3:15, and has never stopped. Very fine flakes. Link to comment Share on other sites More sharing options...
StudentOfClimatology Posted March 16, 2014 Share Posted March 16, 2014 Is anyone raining? I'm still misting, but I think we flip soon. Link to comment Share on other sites More sharing options...
CoastalWx Posted March 16, 2014 Share Posted March 16, 2014 What HM and Phil were describing...you can see how this is frontogenesis. Check out the converging wind vectors tightening up the thermal gradient. South winds over central VA, west winds near the PA border. Tighten that gradient over time and the atmosphere is not in a thermal balance that is strives to be at. The result if a circulation that develops on the "warm" side of the gradient...and hence the lift. This will start as a thump, the question is how organized will it be into the overnight hours. Sometimes the actual swath of snow dries up, but you are left with one narrow ribbon of snow left while everyone else is just getting very light snows. It's possible that occurs after 06z or so, but certainly no guarantee. Link to comment Share on other sites More sharing options...
Sparky Posted March 16, 2014 Share Posted March 16, 2014 flakes and 35F Link to comment Share on other sites More sharing options...
Eskimo Joe Posted March 16, 2014 Share Posted March 16, 2014 Permit me this one weenie-ish post, but just imagine if this winds up being a 6" - 9" storm for DC proper. Link to comment Share on other sites More sharing options...
aldie 22 Posted March 16, 2014 Share Posted March 16, 2014 Nice rates now Link to comment Share on other sites More sharing options...
StudentOfClimatology Posted March 16, 2014 Share Posted March 16, 2014 I'm still misting, but I think we flip soon. Scratch that, flurries/44 degrees..haven't seen that in awhile Link to comment Share on other sites More sharing options...
Bob Chill Posted March 16, 2014 Share Posted March 16, 2014 Lost another degree. 37 and very light but steady snow Link to comment Share on other sites More sharing options...
southernmarylandsnoman Posted March 16, 2014 Share Posted March 16, 2014 Flurries falling in La Plata. Not sure about temp. Will report again soon. Link to comment Share on other sites More sharing options...
WinterWxLuvr Posted March 16, 2014 Share Posted March 16, 2014 These guys been hiding since Thanksgiving. Link to comment Share on other sites More sharing options...
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