Alert archive / Virginia / Mesoscale Discussions in 2022

Mesoscale Discussion 934

May 27, 20224 states

The Storm Prediction Center issued this mesoscale discussion at May 27, 2022, 8:13 AM EDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 27, 2022, 8:13 AM EDT (12:13 UTC)
Expired
May 27, 2022, 10:15 AM EDT
In force
2 hr
Issued by
the Storm Prediction Center
Concerning
Tornado watch 276
All 78 counties

Charles County, MD, Prince George's County, MD, Alamance County, NC, Caswell County, NC, Chatham County, NC, Durham County, NC, Franklin County, NC, Granville County, NC, Guilford County, NC, Harnett County, NC, Johnston County, NC, Lee County, NC, Montgomery County, NC, Moore County, NC, Orange County, NC, Person County, NC, Randolph County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Albemarle County, VA, Amelia County, VA, Amherst County, VA, Appomattox County, VA, Arlington 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 Charlottesville, VA, City of Colonial Heights, VA, City of Danville, VA, City of Fairfax, VA, City of Falls Church, VA, City of Fredericksburg, VA, City of Harrisonburg, VA, City of Lynchburg, VA, City of Manassas, VA, City of Manassas Park, VA, City of Petersburg, VA, City of Richmond, 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, Goochland County, VA, Greene County, VA, Halifax County, VA, Hanover County, VA, Henrico 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, Spotsylvania County, VA, Stafford County, VA, Warren County, VA, Jefferson County, WV

The radar

The Raleigh/Durham radar (KRAX), 123 km from the middle of the area, began a volume at 12:13 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 nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 0.2 hours before the alert went out and 82 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, Roanoke, VA at 12:00Z on 2022-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Roanoke, VA at 12:00Z on 2022-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -177 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
583 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
-177 m²/s²
0-3 km storm-relative helicity
-12 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
May 27, 6:24 AM EDTTornado WatchSPCAnne Arundel, Baltimore, Calvert, Carroll, Charles, Frederick and 6 more8 hr
May 27, 10:59 AM EDTMesoscale DiscussionSPCAnne Arundel, Baltimore, Calvert, Carroll, Charles, Frederick and 5 more91 min
May 27, 11:50 AM EDTTornado WatchSPCCecil, Dorchester, Harford, Somerset, Wicomico, Worcester4 hr
May 27, 11:55 AM EDTMesoscale DiscussionSPCCaroline, Cecil95 min
May 27, 12:57 PM EDTSevere Thunderstorm WatchSPCCaroline, Kent, Queen Anne's, Talbot5 hr
May 27, 5:45 PM EDTSevere Thunderstorm WatchSPCAnne Arundel, Calvert, Charles, Prince George's, Saint Mary's4 hr
May 27, 7:22 PM EDTMesoscale DiscussionSPCCalvert, Charles, Prince George's, Saint Mary's83 min
May 26, 8:32 PM EDTMesoscale DiscussionSPCAlexander, Cabarrus, Catawba, Davidson, Davie, Forsyth and 8 more118 min
May 27, 5:00 AM EDTMesoscale DiscussionSPCAnson, Cabarrus, Davidson, Davie, Gaston, Guilford and 11 more2 hr
May 27, 6:01 AM EDTMesoscale DiscussionSPCAlamance, Caswell, Durham, Franklin, Granville, Guilford and 6 more119 min
May 27, 10:44 AM EDTMesoscale DiscussionSPCBeaufort, Bertie, Camden, Chowan, Craven, Currituck and 14 more91 min
May 27, 2:21 PM EDTMesoscale DiscussionSPCBladen, Chatham, Columbus, Cumberland, Duplin, Durham and 20 more84 min
May 27, 3:38 PM EDTMesoscale DiscussionSPCAlleghany, Ashe, Surry97 min
May 27, 4:26 PM EDTMesoscale DiscussionSPCAlamance, Bladen, Caswell, Chatham, Columbus, Cumberland and 24 more2 hr

Nearby

Mesoscale Discussions in Virginia, 2022Mesoscale Discussions in North Carolina, 2022Mesoscale Discussions in Maryland, 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.