Alert archive / Virginia / Mesoscale Discussions in 2022

Mesoscale Discussion 1249

June 22, 20226 counties in Maryland; 65 counties in Virginia; Berkeley County, Hardy County, Jefferson County, West Virginia

The Storm Prediction Center issued this mesoscale discussion at Jun 22, 2022, 12:57 PM EDT for 6 counties in Maryland; 65 counties in Virginia; Berkeley County, Hardy County, Jefferson County, West Virginia. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued
Jun 22, 2022, 12:57 PM EDT (16:57 UTC)
Expired
Jun 22, 2022, 2:30 PM EDT
In force
93 min
Issued by
the Storm Prediction Center
Concerning
Severe potential...severe thunderstorm watch likely
Chance of a watch
80%
All 74 counties

Carroll County, MD, Charles County, MD, Frederick County, MD, Howard County, MD, Montgomery County, MD, Washington County, MD, Albemarle County, VA, Amelia County, VA, Amherst County, VA, Appomattox County, VA, Arlington County, VA, Augusta County, VA, Bedford County, VA, Botetourt County, VA, Brunswick County, VA, Buckingham County, VA, Campbell County, VA, Caroline County, VA, Charlotte County, VA, Chesterfield County, VA, City of Alexandria, VA, City of Buena Vista, VA, City of Charlottesville, VA, City of Fairfax, VA, City of Falls Church, VA, City of Fredericksburg, VA, City of Harrisonburg, VA, City of Lexington, VA, City of Lynchburg, VA, City of Manassas, VA, City of Manassas Park, VA, City of Martinsville, VA, City of Richmond, VA, City of Roanoke, VA, City of Staunton, VA, City of Waynesboro, VA, City of Winchester, VA, Clarke County, VA, Culpeper County, VA, Cumberland County, VA, Dinwiddie County, VA, Fairfax County, VA, Fauquier County, VA, Fluvanna County, VA, Franklin County, VA, Frederick County, VA, Goochland County, VA, Greene County, VA, Halifax County, VA, Hanover County, VA, King George County, VA, Loudoun County, VA, Louisa County, VA, Lunenburg County, VA, Madison County, VA, Mecklenburg County, VA, Nelson County, VA, Nottoway County, VA, Orange County, VA, Page County, VA, Pittsylvania County, VA, Powhatan County, VA, Prince Edward County, VA, Prince William County, VA, Rappahannock County, VA, Rockbridge County, VA, Rockingham County, VA, Shenandoah County, VA, Spotsylvania County, VA, Stafford County, VA, Warren County, VA, Berkeley County, WV, Hardy County, WV, Jefferson County, WV

The radar

The Sterling radar (KLWX), 141 km from the middle of the area, began a volume at 16:57 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 5.0 hours before the alert went out and 144 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Washington/Dulle, VA at 12:00Z on 2022-06-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 6 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 12:00Z on 2022-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 287 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
6 J/kg
Mixed-layer CIN
-425 J/kg
Mixed-layer LCL
1689 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
287 m²/s²
0-3 km storm-relative helicity
297 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 22, 1:34 PM EDTSevere Thunderstorm WatchSPCAllegany, Carroll, Charles, Frederick, Garrett, Howard and 3 more7 hr
Jun 22, 3:56 PM EDTMesoscale DiscussionSPCAllegany, Carroll, Charles, Frederick, Howard, Montgomery and 1 more94 min
Jun 22, 6:16 PM EDTMesoscale DiscussionSPCAllegany, Carroll, Charles, Frederick, Garrett, Howard and 2 more119 min
Jun 22, 2:22 PM EDTSevere Thunderstorm WatchSPCAmelia, Amherst, Appomattox, Bath, Brunswick, Buckingham and 48 more8 hr
Jun 22, 3:09 PM EDTMesoscale DiscussionSPCAmelia, Brunswick, Caroline, Charles City, Chesterfield, Dinwiddie and 24 more66 min
Jun 22, 4:31 PM EDTMesoscale DiscussionSPCBrunswick, Dinwiddie, Greensville, Isle of Wight, Lunenburg, Mecklenburg and 11 more89 min
Jun 22, 5:53 PM EDTMesoscale DiscussionSPCBuchanan, Dickenson, Lee, Russell, Wise, City of Norton97 min
Jun 22, 6:18 PM EDTSevere Thunderstorm WatchSPCBland, Buchanan, Dickenson, Giles, Tazewell, Wise and 1 more5 hr
Jun 22, 7:54 PM EDTMesoscale DiscussionSPCHalifax, Pittsylvania, City of Danville2 hr
Jun 22, 2:24 PM EDTMesoscale DiscussionSPCBrooke, Doddridge, Hancock, Marion, Marshall, Monongalia and 7 more96 min
Jun 22, 3:40 PM EDTSevere Thunderstorm WatchSPCBarbour, Braxton, Brooke, Calhoun, Doddridge, Gilmer and 23 more6 hr
Jun 22, 4:54 PM EDTMesoscale DiscussionSPCMarion, Marshall, Monongalia, Wetzel96 min
Jun 22, 6:35 PM EDTMesoscale DiscussionSPCBraxton, Calhoun, Clay, Doddridge, Gilmer, Jackson and 14 more85 min

Nearby

Mesoscale Discussions in Virginia, 2022Mesoscale Discussions in Maryland, 2022Mesoscale Discussions in West Virginia, 2022Every mesoscale discussion in 2022

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.