yoda Posted May 22, 2018 Share Posted May 22, 2018 1630 SPC OTLK ...Mid-Atlantic Region... More extensive cloud cover over Pennsylvania and northern West Virginia with fewer cloud to the south is creating a differential heating zone along the southern edge of the thicker clouds. Stronger heating to the south will enhance destabilization in advance of storms beginning to develop over southern West Virginia at this time. VAD winds at RLX and LWX exhibit westerly winds of 30-40 kt above 4 km which will provide sufficient shear to support organized multi-cell storms and possibly an isolated supercell or two. Storms are expected to develop eastward this afternoon with potential for localized damaging wind gusts although isolated hail will also be possible with stronger storms. Link to comment Share on other sites More sharing options...
yoda Posted May 22, 2018 Share Posted May 22, 2018 Mesoscale Discussion 0490 NWS Storm Prediction Center Norman OK 1252 PM CDT Tue May 22 2018 Areas affected...Northeastern Virginia...southern Maryland...and the District of Columbia Concerning...Severe potential...Watch possible Valid 221752Z - 221945Z Probability of Watch Issuance...60 percent SUMMARY...Damaging wind gusts will be possible with stronger storms this afternoon. DISCUSSION...A relatively cloud-free area on visible satellite imagery has been persistent throughout the morning into early afternoon. This has allowed surface temperatures to rise into the mid- to upper-70s. With ample surface moisture -- dewpoints generally in the mid- to upper-60s -- MLCAPE values are currently near 1000 J/kg. With time, continued surface heating should further destabilize the area. Shear values are relatively modest with values between 25-30 kts; however, particularly in areas that receive the most insolation, low-level lapse rates may support damaging wind gusts. Visible satellite imagery indicates weak convection occurring to the west of the discussion area. These storms should intensify as they move into a move favorable environment east of the Appalachians. ..Wendt/Elliott/Weiss.. 05/22/2018 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...AKQ...LWX...RNK... Link to comment Share on other sites More sharing options...
Eskimo Joe Posted May 22, 2018 Share Posted May 22, 2018 I'll take the NAM image that was posted earlier, but move it 60 miles north. Link to comment Share on other sites More sharing options...
2010 extreme Posted May 22, 2018 Share Posted May 22, 2018 SEL6 URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 116 NWS Storm Prediction Center Norman OK 230 PM EDT Tue May 22 2018 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of District Of Columbia Central and Southern Maryland Northern and Central Virginia Coastal Waters * Effective this Tuesday afternoon and evening from 230 PM until 900 PM EDT. * Primary threats include... Scattered damaging wind gusts to 70 mph likely Isolated large hail events to 1.5 inches in diameter possible SUMMARY...Storms moving eastward off the Blue Ridge Mountains are expected to intensify as they progress eastward with potential to produce primarily damaging wind gusts and isolated hail. The severe thunderstorm watch area is approximately along and 60 statute miles east and west of a line from 35 miles west southwest of Richmond VA to 25 miles northwest of Washington DC. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU6). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes. && OTHER WATCH INFORMATION...CONTINUE...WW 115... AVIATION...A few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 27020. Link to comment Share on other sites More sharing options...
yoda Posted May 22, 2018 Share Posted May 22, 2018 Link to comment Share on other sites More sharing options...
wxdude64 Posted May 22, 2018 Share Posted May 22, 2018 Nice line forming Lexington north to Harrisonburg and headed east. Link to comment Share on other sites More sharing options...
Amped Posted May 22, 2018 Share Posted May 22, 2018 Lots of thunder. Surprised the storm isn't warned. Link to comment Share on other sites More sharing options...
Eskimo Joe Posted May 22, 2018 Share Posted May 22, 2018 Surprised Baltimore wasn't included...bit of a potent northern edge. Link to comment Share on other sites More sharing options...
yoda Posted May 22, 2018 Share Posted May 22, 2018 6 minutes ago, Eskimo Joe said: Surprised Baltimore wasn't included...bit of a potent northern edge. 1800 SPC meso shows only 250 J/KG SBCAPE up there Link to comment Share on other sites More sharing options...
yoda Posted May 22, 2018 Share Posted May 22, 2018 BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Baltimore MD/Washington DC 314 PM EDT TUE MAY 22 2018 The National Weather Service in Sterling Virginia has issued a * Severe Thunderstorm Warning for... Southern Madison County in northwestern Virginia... The City of Charlottesville in central Virginia... Southwestern Orange County in central Virginia... Southeastern Rockingham County in western Virginia... Albemarle County in central Virginia... Greene County in central Virginia... * Until 400 PM EDT. * At 314 PM EDT, severe thunderstorms were located along a line extending from 8 miles west of Stanardsville to Free Union to near Crozet, moving east at 20 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Damaging winds will cause some trees and large branches to fall. This could injure those outdoors, as well as damage homes and vehicles. Roadways may become blocked by downed trees. Localized power outages are possible. Unsecured light objects may become projectiles. * Locations impacted include... Charlottesville, Madison, Crozet, Stanardsville, Free Union, Campbell, Westmoreland, Hollymead, Elkton, Gordonsville, Ruckersville, Ivy, Scottsville, North Garden, Eheart, Oakpark, Barboursville, Yancey Mills, Stony Point and Montpelier Station. Link to comment Share on other sites More sharing options...
yoda Posted May 22, 2018 Share Posted May 22, 2018 BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Baltimore MD/Washington DC 325 PM EDT TUE MAY 22 2018 The National Weather Service in Sterling Virginia has issued a * Severe Thunderstorm Warning for... Montgomery County in central Maryland... Southern Frederick County in north central Maryland... East central Loudoun County in northern Virginia... Northeastern Fairfax County in northern Virginia... * Until 415 PM EDT. * At 325 PM EDT, a severe thunderstorm was located over Poolesville, moving east at 25 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Damaging winds will cause some trees and large branches to fall. This could injure those outdoors, as well as damage homes and vehicles. Roadways may become blocked by downed trees. Localized power outages are possible. Unsecured light objects may become projectiles. * Locations impacted include... Germantown, Rockville, Bethesda, Gaithersburg, Olney, Lansdowne, Lowes Island, Pimmit Hills, Poolesville, American Legion Bridge, Mclean, Aspen Hill, Potomac, North Bethesda, Montgomery Village, North Potomac, Tysons Corner, Redland, Great Falls and Countryside. Link to comment Share on other sites More sharing options...
yoda Posted May 22, 2018 Share Posted May 22, 2018 Severe Weather Statement National Weather Service Baltimore MD/Washington DC 332 PM EDT TUE MAY 22 2018 VAC003-079-113-137-540-222000- /O.CON.KLWX.SV.W.0075.000000T0000Z-180522T2000Z/ Madison VA-City of Charlottesville VA-Orange VA-Albemarle VA- Greene VA- 332 PM EDT TUE MAY 22 2018 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT FOR SOUTHERN MADISON...SOUTHWESTERN ORANGE...CENTRAL ALBEMARLE AND SOUTHEASTERN GREENE COUNTIES AND THE CITY OF CHARLOTTESVILLE... At 331 PM EDT, severe thunderstorms were located along a line extending from Stanardsville to near Charlottesville to 8 miles south of Crozet, moving east at 20 mph. HAZARD...70 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Damaging winds will cause some trees and large branches to fall. This could injure those outdoors, as well as damage homes and vehicles. Roadways may become blocked by downed trees. Localized power outages are possible. Unsecured light objects may become projectiles. Locations impacted include... Charlottesville, Stanardsville, Free Union, Campbell, Westmoreland, Hollymead, Gordonsville, Ruckersville, Ivy, Scottsville, Quinque, North Garden, Eheart, Lydia, Oakpark, Barboursville, Stony Point, Flordon, Montpelier Station and Newtown. Link to comment Share on other sites More sharing options...
yoda Posted May 22, 2018 Share Posted May 22, 2018 Tree damage reported in CHO Link to comment Share on other sites More sharing options...
BlizzardNole Posted May 22, 2018 Share Posted May 22, 2018 My wife said it looked pretty wild in Germantown. LOL we get the rare strong thunderstorm and I'm not home (in DC at work). Link to comment Share on other sites More sharing options...
yoda Posted May 22, 2018 Share Posted May 22, 2018 Just now, BlizzardNole said: My wife said it looked pretty wild in Germantown. LOL we get the rare strong thunderstorm and I'm not home (in DC at work). Radar looks like incoming into DC Link to comment Share on other sites More sharing options...
BlizzardNole Posted May 22, 2018 Share Posted May 22, 2018 Might get more of that t-storm that I bargained for -- it looks to hit right as I am on my several block walk to Union Station. Link to comment Share on other sites More sharing options...
mattskiva Posted May 22, 2018 Share Posted May 22, 2018 Very impressive lightning with the cell over my area (near South Riding). Lots of big CG strikes, looks like positive strikes if the radar is to be believed. Link to comment Share on other sites More sharing options...
smokeybandit Posted May 22, 2018 Share Posted May 22, 2018 Meh Link to comment Share on other sites More sharing options...
mattskiva Posted May 22, 2018 Share Posted May 22, 2018 Just now, smokeybandit said: Meh You people will 'meh' anything. Admittedly, no hail so far at my location, just heavy rain, and not too much wind. But lots of very loud CG strikes very close to me. Link to comment Share on other sites More sharing options...
Cobalt Posted May 22, 2018 Share Posted May 22, 2018 Couple large rumbles of thunder and a singular lightning strike in DC. Link to comment Share on other sites More sharing options...
Mrs.J Posted May 22, 2018 Share Posted May 22, 2018 Had that line of storms push through right at school dismissal. Got my girls at the bus stop and it was rivers of water rushing down the street with thunder cracking. Most kids had rain gear, some did not. Link to comment Share on other sites More sharing options...
NorthArlington101 Posted May 22, 2018 Share Posted May 22, 2018 Rain is really heavy and there are some occasional rumbles. Feels tropical. Link to comment Share on other sites More sharing options...
smokeybandit Posted May 22, 2018 Share Posted May 22, 2018 The "meh" is for a lone rumble of thunder and light rain Link to comment Share on other sites More sharing options...
Cobalt Posted May 22, 2018 Share Posted May 22, 2018 Gigantic rumble of thunder. Lots of water on the roadways . Link to comment Share on other sites More sharing options...
Cobalt Posted May 22, 2018 Share Posted May 22, 2018 Gigantic rumble of thunder. Lots of water on the roadways .Huge patch of water at least the length of one lane spotted on Old Dominion drive. Link to comment Share on other sites More sharing options...
BlizzardNole Posted May 22, 2018 Share Posted May 22, 2018 Raining hard and blowing in NE DC -- I'm gonna take a train 20 minutes later rather than get soaked. I have an umbrella but that's not helping on the First Street canyon effect. ** Oooh just had a ctg strike with thunder less than a second after -- must have been within a few hundred feet. Link to comment Share on other sites More sharing options...
MN Transplant Posted May 22, 2018 Share Posted May 22, 2018 If we could only save this rain for later in the summer. 0.68" in the last 25 min, 0.80" on the day. Link to comment Share on other sites More sharing options...
yoda Posted May 22, 2018 Share Posted May 22, 2018 Just had a real close CG strike Link to comment Share on other sites More sharing options...
yoda Posted May 22, 2018 Share Posted May 22, 2018 Just now, WxWatcher007 said: This is one heck of a rainer DPs 65 to 70 ftw Link to comment Share on other sites More sharing options...
MN Transplant Posted May 22, 2018 Share Posted May 22, 2018 It is one of my most sadistic joys of life - watching people without umbrellas scramble in heavy rain. Link to comment Share on other sites More sharing options...
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