Eskimo Joe Posted April 15 Share Posted April 15 Watch coming coming out. Looks like from I-70 south? Link to comment Share on other sites More sharing options...
yoda Posted April 15 Share Posted April 15 4 minutes ago, NorthArlington101 said: Severe Thunderstorm Watch just issued as well. URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 109 NWS Storm Prediction Center Norman OK 150 PM EDT Mon Apr 15 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of District Of Columbia Southern Delaware Central and Eastern Maryland Virginia Central and Eastern West Virginia Coastal Waters * Effective this Monday afternoon and evening from 150 PM until 1000 PM EDT. * Primary threats include... Scattered damaging wind gusts to 70 mph likely Scattered large hail and isolated very large hail events to 2 inches in diameter possible SUMMARY...Broken bands of strong to severe thunderstorms are forecast to develop this afternoon and move east-southeast through the mid evening. Scattered severe gusts capable of wind damage will be possible with the stronger cores and outflow winds. Large hail may accompany the early cellular storm activity. The severe thunderstorm watch area is approximately along and 90 statute miles north and south of a line from 20 miles west northwest of Beckley WV to 30 miles east southeast of Wallops VA. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU9). Link to comment Share on other sites More sharing options...
yoda Posted April 15 Share Posted April 15 3 minutes ago, Eskimo Joe said: Watch coming coming out. Looks like from I-70 south? Looks like they added Baltimore metro 2 Link to comment Share on other sites More sharing options...
Eskimo Joe Posted April 15 Share Posted April 15 Looks like there maybe a subtle northwest moving boundary on LWX radar. Check out the 0.5° base velocity. If that can juice up those cells coming off WV then we might see some decent hailers coming into the NW suburbs. 1 1 Link to comment Share on other sites More sharing options...
ge0 Posted April 15 Share Posted April 15 Berryville storm dumped a lot of hail 3 Link to comment Share on other sites More sharing options...
SnowenOutThere Posted April 15 Share Posted April 15 2 minutes ago, Eskimo Joe said: Looks like there maybe a subtle northwest moving boundary on LWX radar. Check out the 0.5° base velocity. If that can juice up those cells coming off WV then we might see some decent hailers coming into the NW suburbs. Appears to be the most prominent directly west and north of the radar station. Will see if that can help get some more convection for them right as they move into the more populated areas. Link to comment Share on other sites More sharing options...
Eskimo Joe Posted April 15 Share Posted April 15 1 minute ago, ge0 said: Berryville storm dumped a lot of hail How large? Link to comment Share on other sites More sharing options...
yoda Posted April 15 Share Posted April 15 Poolesville cell looks nasty... see 70+ dbz on Radarscope Link to comment Share on other sites More sharing options...
yoda Posted April 15 Share Posted April 15 Preliminary Local Storm Report National Weather Service Baltimore MD/Washington DC 210 PM EDT Mon Apr 15 2024 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 0159 PM Hail 3 S Lucketts 39.18N 77.54W 04/15/2024 M1.00 inch Loudoun VA Trained Spotter && Event Number LWX2403036 Link to comment Share on other sites More sharing options...
biodhokie Posted April 15 Share Posted April 15 some juicy mammatus ahead of the Germantown cell currently warned 8 Link to comment Share on other sites More sharing options...
yoda Posted April 15 Share Posted April 15 Severe Weather Statement National Weather Service Baltimore MD/Washington DC 224 PM EDT Mon Apr 15 2024 MDC031-151845- /O.CON.KLWX.SV.W.0014.000000T0000Z-240415T1845Z/ Montgomery MD- 224 PM EDT Mon Apr 15 2024 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM EDT FOR CENTRAL MONTGOMERY COUNTY... At 224 PM EDT, a severe thunderstorm was located over Gaithersburg, moving east at 35 mph. HAZARD...Ping pong ball size hail and 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... Germantown, Rockville, Bethesda, Gaithersburg, Olney, Aspen Hill, Potomac, North Bethesda, Montgomery Village, North Potomac, Redland, Chevy Chase, North Kensington, South Kensington, Rossmoor, Wheaton-Glenmont, Wheaton, Cloverly, Glenmont, and Darnestown. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 3915 7702 3900 7708 3912 7735 3917 7732 TIME...MOT...LOC 1824Z 289DEG 30KT 3913 7726 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.50 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH Link to comment Share on other sites More sharing options...
Eskimo Joe Posted April 15 Share Posted April 15 M0.75" hail Gaithersburg Link to comment Share on other sites More sharing options...
biodhokie Posted April 15 Share Posted April 15 Just now, Eskimo Joe said: M0.75" hail Gaithersburg max I experienced was pea sized hail at 270/shady Grove. Link to comment Share on other sites More sharing options...
George BM Posted April 15 Share Posted April 15 Nonstop thunder in Herndon. 2 Link to comment Share on other sites More sharing options...
yoda Posted April 15 Share Posted April 15 Trained spotters reported goofball size hail in Hanson Park - that's the Fairfax/Loudoun warned cell Link to comment Share on other sites More sharing options...
yoda Posted April 15 Share Posted April 15 Severe Weather Statement National Weather Service Baltimore MD/Washington DC 242 PM EDT Mon Apr 15 2024 VAC059-107-151900- /O.CON.KLWX.SV.W.0015.000000T0000Z-240415T1900Z/ Loudoun VA-Fairfax VA- 242 PM EDT Mon Apr 15 2024 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT FOR SOUTHEASTERN LOUDOUN AND NORTHWESTERN FAIRFAX COUNTIES... At 242 PM EDT, a severe thunderstorm was located over Brambleton, moving east at 35 mph. HAZARD...Golf ball size hail reprted by a trained spotter in Hanson Park. SOURCE...Trained weather spotters. IMPACT...Hail is large enough to dent and damage vehicles. Some damage to roofs, siding, and windows is possible. Locations impacted include... Reston, Herndon, Fairfax, Broadlands, Brambleton, Dulles International Airport, Ashburn, Oakton, Sterling, Wolf Trap, Great Falls, and Arcola. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 3898 7726 3886 7731 3887 7733 3897 7758 3902 7756 TIME...MOT...LOC 1842Z 287DEG 29KT 3897 7750 THUNDERSTORM DAMAGE THREAT...CONSIDERABLE HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...<50 MPH Link to comment Share on other sites More sharing options...
09-10 analogy Posted April 15 Share Posted April 15 First thunder. Would prefer no hail. If I had a garage I wouldn't care, but ... 1 Link to comment Share on other sites More sharing options...
George BM Posted April 15 Share Posted April 15 Just had quite a bit of dime to quarter-sized hail with that western Fairfax county storm. 3 Link to comment Share on other sites More sharing options...
09-10 analogy Posted April 15 Share Posted April 15 2 minutes ago, George BM said: Just had quite a bit of dime to quarter-sized hail with that western Fairfax county storm. You can keep it. 1 Link to comment Share on other sites More sharing options...
yoda Posted April 15 Share Posted April 15 Coming for @MN Transplant BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Baltimore MD/Washington DC 259 PM EDT Mon Apr 15 2024 The National Weather Service in Sterling Virginia has issued a * Severe Thunderstorm Warning for... The southwestern District of Columbia... Arlington County in northern Virginia... The City of Falls Church in northern Virginia... Northeastern Fairfax County in northern Virginia... The City of Alexandria in northern Virginia... * Until 345 PM EDT. * At 258 PM EDT, a severe thunderstorm was located over Reston, moving east at 30 mph. HAZARD...Quarter size hail. SOURCE...Trained weather spotters. IMPACT...Some hail damage to agriculture is expected. * Locations impacted include... Arlington, Alexandria, Reston, Annandale, Vienna, Falls Church, Pimmit Hills, Reagan National Airport, Mclean, Rosslyn, Crystal City, Howard University, Oakton, Lincolnia, Tysons Corner, Wolf Trap, Merrifield, Lake Barcroft, American University, and I66 and I495 Interchange. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Link to comment Share on other sites More sharing options...
MN Transplant Posted April 15 Share Posted April 15 1 minute ago, yoda said: Coming for @MN Transplant BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Baltimore MD/Washington DC 259 PM EDT Mon Apr 15 2024 The National Weather Service in Sterling Virginia has issued a * Severe Thunderstorm Warning for... The southwestern District of Columbia... Arlington County in northern Virginia... The City of Falls Church in northern Virginia... Northeastern Fairfax County in northern Virginia... The City of Alexandria in northern Virginia... * Until 345 PM EDT. * At 258 PM EDT, a severe thunderstorm was located over Reston, moving east at 30 mph. HAZARD...Quarter size hail. SOURCE...Trained weather spotters. IMPACT...Some hail damage to agriculture is expected. * Locations impacted include... Arlington, Alexandria, Reston, Annandale, Vienna, Falls Church, Pimmit Hills, Reagan National Airport, Mclean, Rosslyn, Crystal City, Howard University, Oakton, Lincolnia, Tysons Corner, Wolf Trap, Merrifield, Lake Barcroft, American University, and I66 and I495 Interchange. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. You aren’t kidding. 1 Link to comment Share on other sites More sharing options...
yoda Posted April 15 Share Posted April 15 Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 229 PM EDT Mon Apr 15 2024 .SYNOPSIS... A cold front will drop southward through the area tonight, before returning northward as a warm front on Wednesday. A strong cold front will move through this weekend, with high pressure building in early next week. && .NEAR TERM /THROUGH TONIGHT/... Severe Thunderstorrm Watch #109 is valid until 10 PM since it covers most of VA to the NC border, although storms are likely to exit our forecast around 7 PM. Very steep mid-level lapse rates of around 8C/km due to 500 mb temps of around -20C were observed on earlier upper air data and more recent MetOp-C NUCAPS data. This will contribute to a very favorable environment for large hail perhaps approaching significant hail up to 2 inches in diameter. Storms will be fast movers moving around 35 knots and given large dewpoint depressions and strond mid-level flow may be also capable of producing strong to damaging winds. Storms should exit our CWA by 8 PM, likely a little sooner than that. Rapidly clearing skies are expected later this evening behind exiting cold front. High pressure builds over the area overnight into Tue morning with quiet conditions overnight through Tue morning. 1 Link to comment Share on other sites More sharing options...
yoda Posted April 15 Share Posted April 15 Looks like the Fairfax cell is dragging an outflow boundary behind it/to its west on Radarscope? 1 Link to comment Share on other sites More sharing options...
MN Transplant Posted April 15 Share Posted April 15 Best hail in my 20 years in the DC area. Pea to marble 6 Link to comment Share on other sites More sharing options...
yoda Posted April 15 Share Posted April 15 Warrenton cell just went severe Link to comment Share on other sites More sharing options...
NorthArlington101 Posted April 15 Share Posted April 15 Best hail in my 20 years in the DC area. Pea to marbleFamily in Arlington concurs. Hearing thunder in Penn Quarter. Link to comment Share on other sites More sharing options...
09-10 analogy Posted April 15 Share Posted April 15 Pocket of 9 C/km LLLR SW of DC according to latest SPC mesoanalysis. 1 Link to comment Share on other sites More sharing options...
yoda Posted April 15 Share Posted April 15 Don't see this either everyday in our region - 3pm mid-level lapse rates 1 Link to comment Share on other sites More sharing options...
yoda Posted April 15 Share Posted April 15 @MN Transplant guess this was just north of you? Emergency management and NWS employees report half dollar size hail in Falls Church per LSR Link to comment Share on other sites More sharing options...
MN Transplant Posted April 15 Share Posted April 15 14 Link to comment Share on other sites More sharing options...
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