Alert archive / Virginia / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 39, NWS Baltimore/Washington

June 16, 2023Nelson County, Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at Jun 16, 2023, 2:34 PM EDT for Nelson County, Virginia. It was in force for 30 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: Jun 16, 2023, 2:34 PM EDT (18:34 UTC)
Expired: Jun 16, 2023, 3:04 PM EDT
In force: 30 min
Issued by: NWS Baltimore/Washington
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Nelson County, VA

The radar

The Roanoke radar (KFCX), 149 km from the middle of the area, began a volume at 18:35 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 6.6 hours before the alert went out and 183 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 119 J/kg
Mixed-layer CIN: -101 J/kg
Mixed-layer LCL: 910 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 40 m²/s²
0-3 km storm-relative helicity: 101 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Baltimore/Washington wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 16, 9:36 AM EDT, 4 hours 58 minutes earlier.

Area forecast discussion, Jun 16, 9:36 AM EDT, 4 hours 58 minutes before

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Hazardous weather outlook, Jun 16, 1:29 PM EDT, 1 hour 5 minutes before

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In the hours before

Local storm report, Jun 16, 11:58 AM EDT, 2 hours 36 minutes before

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Local storm report, Jun 16, 12:09 PM EDT, 2 hours 25 minutes before

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Local storm report, Jun 16, 12:15 PM EDT, 2 hours 19 minutes before

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The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 16, 3:46 AM EDT	Small Craft Advisory	LWX		40 hr
Jun 16, 10:55 AM EDT	Special Marine Warning	LWX		61 min
Jun 16, 11:05 AM EDT	Special Marine Warning	LWX		55 min
Jun 16, 2:09 PM EDT	Severe Thunderstorm Warning	LWX	Albemarle, Nelson	51 min
Jun 16, 3:31 PM EDT	Severe Thunderstorm Warning	LWX	Clarke, Frederick	29 min
Jun 16, 3:59 PM EDT	Severe Thunderstorm Warning	LWX	Clarke, Loudoun	31 min
Jun 16, 4:32 PM EDT	Severe Thunderstorm Warning	LWX	Culpeper, Fauquier, Orange, Spotsylvania, Stafford	43 min
Jun 16, 4:50 PM EDT	Special Marine Warning	LWX		85 min
Jun 16, 4:55 PM EDT	Special Marine Warning	LWX		95 min
Jun 16, 4:58 PM EDT	Severe Thunderstorm Warning	LWX	Culpeper, Spotsylvania, Stafford, City of Fredericksburg	35 min
Jun 16, 5:18 PM EDT	Severe Thunderstorm Warning	LWX	Fairfax, Prince William, City of Manassas, City of Manassas Park	42 min
Jun 16, 5:44 PM EDT	Special Marine Warning	LWX		91 min
Jun 16, 6:17 PM EDT	Severe Thunderstorm Warning	LWX	Orange, Spotsylvania	43 min
Jun 16, 7:05 PM EDT	Special Marine Warning	LWX		85 min
Jun 16, 7:51 PM EDT	Special Marine Warning	LWX		84 min
Jun 16, 1:48 AM EDT	Coastal Flood Advisory	LWX	Anne Arundel	7 hr
Jun 16, 10:36 AM EDT	Severe Thunderstorm Warning	LWX	Cecil, Harford	39 min
Jun 16, 5:55 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Prince George's	50 min
Jun 16, 6:29 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Saint Mary's	46 min
Jun 16, 7:02 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Charles, Saint Mary's	43 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2023 Every severe thunderstorm warning in 2023

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.