Deck Pic Posted January 23, 2013 Share Posted January 23, 2013 Ah, makes sense. Sorry, I'm so use to not driving into work, I forgot that a dusting can cause issues yep..RDU has 0.25" a few years back that crippled the region due to timing...morining rush could be nasty somewhere...people in DC drive like idiots Link to comment Share on other sites More sharing options...
Deck Pic Posted January 23, 2013 Share Posted January 23, 2013 Exactly. Almost 100 cars crashed into each other in ohio 2 days ago from a snow squall. 1" on frozen roads can be very hazardous here. Much moreso than 3"+ falling @ 34 degrees. yep..RDU has 0.25" a few years back that crippled the region due to timing...morining rush could be nasty somewhere...people in DC drive like idiots gmta Link to comment Share on other sites More sharing options...
CranberryWX Posted January 23, 2013 Share Posted January 23, 2013 Very light snow starting to fall here. mostly just drifting around with the wind. Link to comment Share on other sites More sharing options...
Bob Chill Posted January 23, 2013 Share Posted January 23, 2013 20z RAP has me starting by 11pm.....and looks pretty good...every model data suggests backbuilding so hopefully there isn't radar suicide early That tail is really interesting. Running hires nam loop shows it even better. Looks like pretty good rates even if they are relatively short lived. Should be fun even if it's only an inch. Link to comment Share on other sites More sharing options...
gymengineer Posted January 23, 2013 Share Posted January 23, 2013 And even here, it was a dusting a few years ago that iced up roads for morning rush hour, and a really terrible half-inch (0.4" at DCA) on 1/18/2000 that caused Commutageddon-type traffic jams for evening rush. Link to comment Share on other sites More sharing options...
North Balti Zen Posted January 23, 2013 Share Posted January 23, 2013 WWA for a possible inch? They kinda have to...its so cold, that if it gets on the roads, they could get icy. ETA...sorry Katie, should have read on further. Didn't mean to be a chorus... Link to comment Share on other sites More sharing options...
mappy Posted January 23, 2013 Share Posted January 23, 2013 They kinda have to...its so cold, that if it gets on the roads, they could get icy. Matt beat you too it Link to comment Share on other sites More sharing options...
North Balti Zen Posted January 23, 2013 Share Posted January 23, 2013 Matt beat you too it I couldn't even get my edit apology up fast enough...(sad face) Link to comment Share on other sites More sharing options...
aldie 22 Posted January 23, 2013 Share Posted January 23, 2013 Getting on the plane here in Columbus Ohio...no snow here yet... Link to comment Share on other sites More sharing options...
gymengineer Posted January 23, 2013 Share Posted January 23, 2013 Here's a couple of snippets from a Post article about that 1/18/2000 0.4" disaster: "Nineteen Prince George's County school buses carrying children homeward were still on the roads at 11:20 pm..." "Thirty school buses also were stuck in traffic in Montgomery County at 9 p.m...." "Traffic was still creeping or not moving at all on some major arteries in the city and the Maryland suburbs after 11 last night.....police closed winding East-West Highway between Connecticut and Wisconsin avenues at the height of the crunch. In the District, 20 minute commutes degenerated into multi-hour ordeals. Traffic along Georgia Avenue NW, one of the main routes in and out of the city, was at a standstill for most of the afternoon and evening." Link to comment Share on other sites More sharing options...
CAPE Posted January 23, 2013 Share Posted January 23, 2013 They kinda have to...its so cold, that if it gets on the roads, they could get icy. ETA...sorry Katie, should have read on further. Didn't mean to be a chorus... WTH? Actually no they dont. There might be an inch in some spots, but most places that are in the advisory are forecasted to get a a half inch or less! Read Mount Holly AFD for comparison. Same accums predicted in eastern MD and DE... up to an inch, No advisory. The criteria is 2 inches. Link to comment Share on other sites More sharing options...
usedtobe Posted January 23, 2013 Share Posted January 23, 2013 The 20Z RAP is interesting and would say the heaviest rates would be in the 2-5 AM time as the model has pretty good uvv (over me). Link to comment Share on other sites More sharing options...
mitchnick Posted January 23, 2013 Share Posted January 23, 2013 The 20Z RAP is interesting and would say the heaviest rates would be in the 2-5 AM time as the model has pretty good uvv (over me). it's coming north of you Wes so give it up Link to comment Share on other sites More sharing options...
nw baltimore wx Posted January 23, 2013 Share Posted January 23, 2013 WTH? Actually no they dont. There might be an inch in some spots, but most places that are in the advisory are forecasted to get a a half inch or less! Read Mount Holly AFD for comparison. Same accums predicted in eastern MD and DE... up to an inch, No advisory. The criteria is 2 inches. I'm not sure that they still do it, but I'm pretty sure LWX had (has?) rush hour criteria. It would also explain why the WWA is in the counties of and adjacent to interstate 95. Link to comment Share on other sites More sharing options...
mitchnick Posted January 23, 2013 Share Posted January 23, 2013 note that pivot come to papa! http://radar.weather.gov/Conus/centgrtlakes_loop.php Link to comment Share on other sites More sharing options...
snowfan Posted January 23, 2013 Share Posted January 23, 2013 note that pivot come to papa! http://radar.weather.gov/Conus/centgrtlakes_loop.php Link to comment Share on other sites More sharing options...
usedtobe Posted January 23, 2013 Share Posted January 23, 2013 I'm not sure that they still do it, but I'm pretty sure LWX had (has?) rush hour criteria. It would also explain why the WWA is in the counties of and adjacent to interstate 95. Even if they don't with it probably lasting into early rush hour it's a good advisory in my view. Link to comment Share on other sites More sharing options...
gymengineer Posted January 23, 2013 Share Posted January 23, 2013 Even if they don't with it probably lasting into early rush hour it's a good advisory in my view. It's right on their wesbite: Winter Weather Advisory A Winter Weather Advisory will be issued when 2 to 4 inches of snow, alone or in combination with sleet and freezing rain, is expected to cause a significant inconvenience, but not serious enough to warrant a warning. If the event is expected to impact the Baltimore/Washington metro areas during rush hours (4-9 am or 2-7 pm on weekdays) forecasted snow totals of one inch will necessitate the issuance of a winter weather advisory. The snow/sleet criteria for a Winter Weather Advisory for the five westernmost counties (Allegany, Mineral, Grant, Pendleton, and Highland) is higher (3-5 inches). Link to comment Share on other sites More sharing options...
nw baltimore wx Posted January 23, 2013 Share Posted January 23, 2013 Gym beat me to it, but they changed that a few years ago. I remember the discussion of it at AmWx. Link to comment Share on other sites More sharing options...
usedtobe Posted January 23, 2013 Share Posted January 23, 2013 It's right on their wesbite: Winter Weather Advisory A Winter Weather Advisory will be issued when 2 to 4 inches of snow, alone or in combination with sleet and freezing rain, is expected to cause a significant inconvenience, but not serious enough to warrant a warning. If the event is expected to impact the Baltimore/Washington metro areas during rush hours (4-9 am or 2-7 pm on weekdays) forecasted snow totals of one inch will necessitate the issuance of a winter weather advisory. The snow/sleet criteria for a Winter Weather Advisory for the five westernmost counties (Allegany, Mineral, Grant, Pendleton, and Highland) is higher (3-5 inches). Good find! Link to comment Share on other sites More sharing options...
CAPE Posted January 23, 2013 Share Posted January 23, 2013 I'm not sure that they still do it, but I'm pretty sure LWX had (has?) rush hour criteria. It would also explain why the WWA is in the counties of and adjacent to interstate 95. Interesting to see how neighboring offices view things differently. Mount Holly is very matter of fact in their AFD about not posting any advisories due to very low potential to reach the 2 inch criteria. And I dont think anyone is going to think they weren't properly warned if there is a coating of snow on the ground for drive time in the morning. Link to comment Share on other sites More sharing options...
Bob Chill Posted January 23, 2013 Share Posted January 23, 2013 Interesting to see how neighboring offices view things differently. Mount Holly is very matter of fact in their AFD about not posting any advisories due to very low potential to reach the 2 inch criteria. And I dont think anyone is going to think they weren't properly warned if there is a coating of snow on the ground for drive time in the morning. That's the tricky part. If roads are gridlocked and riddled with accidents then everyone will hold mt holly accountable for not issuing anything. Doesn't matter how much snow falls. Perception is reality. If weather causes a commuting disaster then # of inches mean squat in the average persons mind. Link to comment Share on other sites More sharing options...
wxmeddler Posted January 23, 2013 Share Posted January 23, 2013 Not to mention that everyone will have forgotten how to drive on one inch of snow. If not plowed cleanly, heat from the engines and friction in the tires on roads will have the required 80cal/gram to cause melting, and thus re-freezing. Link to comment Share on other sites More sharing options...
gymengineer Posted January 23, 2013 Share Posted January 23, 2013 Interesting to see how neighboring offices view things differently. Mount Holly is very matter of fact in their AFD about not posting any advisories due to very low potential to reach the 2 inch criteria. And I dont think anyone is going to think they weren't properly warned if there is a coating of snow on the ground for drive time in the morning. In the meantime, it still doesn't make sense that PHL has a lower threshold for a WSWarning than DC. Link to comment Share on other sites More sharing options...
wxdude64 Posted January 23, 2013 Share Posted January 23, 2013 Very light snow starting to fall here. mostly just drifting around with the wind. Can confirm that at my location too, a few flakes drifting in the wind in last 5-10 minutes. DP has rose from -8.2 to +4.0 in last hour. 25.6 degrees. Link to comment Share on other sites More sharing options...
H2O Posted January 23, 2013 Share Posted January 23, 2013 Oh big deal. Powdery snow can cause issues in this area so let them put out a WWA. Link to comment Share on other sites More sharing options...
usedtobe Posted January 23, 2013 Share Posted January 23, 2013 That's the tricky part. If roads are gridlocked and riddled with accidents then everyone will hold mt holly accountable for not issuing anything. Doesn't matter how much snow falls. Perception is reality. If weather causes a commuting disaster then # of inches mean squat in the average persons mind. Exactly, I'd sure put out an advisory. Link to comment Share on other sites More sharing options...
nw baltimore wx Posted January 23, 2013 Share Posted January 23, 2013 Oh big deal. Powdery snow can cause issues in this area so let them out out a WWA. The more hysteria, the better the chance that I start work late tomorrow! Link to comment Share on other sites More sharing options...
CAPE Posted January 23, 2013 Share Posted January 23, 2013 In the meantime, it still doesn't make sense that PHL has a lower threshold for a WSWarning than DC. Its 4 inches for Philly and SE I believe? And wasn't the criteria raised to 5 for the DC area? Link to comment Share on other sites More sharing options...
CAPE Posted January 23, 2013 Share Posted January 23, 2013 Exactly, I'd sure put out an advisory. LOL I guess I am just old school. Maybe this is why people here freak out over a coating of snow and other places its barely noticed. Business as usual. Link to comment Share on other sites More sharing options...
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