Alert archive / Virginia / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 65, NWS Baltimore/Washington

May 3, 2019Clarke County, Frederick County, City of Winchester, Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at May 3, 2019, 3:42 PM EDT for Clarke County, Frederick County, City of Winchester, Virginia. It was in force for 34 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: May 3, 2019, 3:42 PM EDT (19:42 UTC)
Expired: May 3, 2019, 4:16 PM EDT
In force: 34 min
Issued by: NWS Baltimore/Washington
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties City of Winchester, VA, Clarke County, VA, Frederick County, VA

The radar

The Sterling radar (KLWX), 60 km from the middle of the area, began a volume at 19:44 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 3, 2:21 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Pittsburgh, PA (KAGC), launched 12:00Z, 7.7 hours before the alert went out and 217 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: 6 J/kg
Mixed-layer CIN: -179 J/kg
Mixed-layer LCL: 944 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 May 3, 2:53 PM EDT, 49 minutes earlier.

Area forecast discussion, May 3, 2:53 PM EDT, 49 minutes before

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Hazardous weather outlook, May 3, 2:33 PM EDT, 1 hour 9 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
May 3, 1:48 PM EDT	Severe Thunderstorm Warning	LWX	Rockingham, Shenandoah	42 min
May 3, 3:06 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, City of Winchester	39 min
May 3, 4:09 PM EDT	Flash Flood Watch	LWX	Clarke, Frederick, City of Winchester	5 hr
May 3, 4:29 PM EDT	Severe Thunderstorm Warning	LWX	Clarke, Frederick, Shenandoah, Warren	46 min
May 3, 5:05 PM EDT	Severe Thunderstorm Warning	LWX	Clarke, Frederick, Warren	40 min
May 3, 5:17 PM EDT	Small Craft Advisory	LWX		4 hr
May 3, 7:55 PM EDT	Severe Thunderstorm Warning	LWX	Clarke, Frederick	50 min
May 3, 7:27 PM EDT	Severe Thunderstorm Warning	LWX	Berkeley, Jefferson	48 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2019 Every severe thunderstorm warning in 2019

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.