Alert archive / Virginia / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 116, NWS Wakefield, VA

August 19, 20184 counties in Virginia

NWS Wakefield, VA issued this severe thunderstorm warning at Aug 19, 2018, 5:09 PM EDT for 4 counties in Virginia. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 19, 2018, 5:09 PM EDT (21:09 UTC)
Expired
Aug 19, 2018, 5:44 PM EDT
In force
35 min
Issued by
NWS Wakefield, VA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Cumberland County, VA, Lunenburg County, VA, Nottoway County, VA, Prince Edward County, VA

The radar

The Norfolk radar (KAKQ), 112 km from the middle of the area, began a volume at 21:08 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, 9.2 hours before the alert went out and 111 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 2018-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 523 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, Roanoke, VA at 12:00Z on 2018-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 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
523 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
669 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
45 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The office that day

Everything else NWS Wakefield, VA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 19, 1:45 AM EDTSpecial Weather StatementAKQGreensville, Mecklenburg, City of Emporia45 min
Aug 19, 3:46 PM EDTSpecial Weather StatementAKQCity of Chesapeake44 min
Aug 19, 4:09 PM EDTSpecial Weather StatementAKQPrince Edward51 min
Aug 19, 4:17 PM EDTSpecial Weather StatementAKQCity of Virginia Beach43 min
Aug 19, 4:23 PM EDTSpecial Weather StatementAKQCity of Chesapeake52 min
Aug 19, 4:39 PM EDTSpecial Weather StatementAKQCity of Virginia Beach51 min
Aug 19, 4:43 PM EDTSpecial Weather StatementAKQPrince Edward47 min
Aug 19, 7:50 PM EDTSpecial Weather StatementAKQSouthampton, City of Franklin40 min
Aug 18, 8:53 PM EDTSpecial Weather StatementAKQSomerset67 min
Aug 18, 9:57 PM EDTSpecial Weather StatementAKQBertie63 min
Aug 18, 11:12 PM EDTSpecial Weather StatementAKQBertie, Camden, Chowan, Pasquotank, Perquimans78 min
Aug 19, 12:18 AM EDTAreal Flood AdvisoryAKQBertie, Chowan, Hertford, Perquimans117 min
Aug 19, 12:23 AM EDTSpecial Weather StatementAKQCamden, Currituck, Pasquotank, Perquimans82 min
Aug 19, 1:11 AM EDTAreal Flood AdvisoryAKQCamden, Chowan, Currituck, Pasquotank, Perquimans2 hr
Aug 19, 5:05 PM EDTSpecial Weather StatementAKQCurrituck40 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2018Every severe thunderstorm warning in 2018

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.