Alert archive / Virginia / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 204, NWS Baltimore/Washington

August 17, 2003Orange County, Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at Aug 17, 2003, 1:26 PM EDT for Orange County, Virginia. It was in force for 64 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 17, 2003, 1:26 PM EDT (17:26 UTC)
Expired: Aug 17, 2003, 2:30 PM EDT
In force: 64 min
Issued by: NWS Baltimore/Washington
Area: Counties, with a storm outline in the text

County Orange County, VA

The radar

The Sterling radar (KLWX), 93 km from the middle of the area, began a volume at 17:26 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, 5.4 hours before the alert went out and 175 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: 402 J/kg
Mixed-layer CIN: -158 J/kg
Mixed-layer LCL: 1036 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 69 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 Aug 17, 9:20 AM EDT, 4 hours 6 minutes earlier.

Area forecast discussion, Aug 17, 9:20 AM EDT, 4 hours 6 minutes before

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Hazardous weather outlook, Aug 17, 11:00 AM EDT, 2 hours 26 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
Aug 16, 9:02 PM EDT	Severe Thunderstorm Warning	LWX	Clarke	43 min
Aug 16, 9:45 PM EDT	Severe Thunderstorm Warning	LWX	Loudoun	45 min
Aug 17, 3:06 PM EDT	Severe Thunderstorm Warning	LWX	Albemarle, City of Charlottesville	54 min
Aug 17, 3:19 PM EDT	Flash Flood Warning	LWX	Augusta	3 hr
Aug 17, 4:04 PM EDT	Severe Thunderstorm Warning	LWX	Nelson	41 min
Aug 16, 10:25 PM EDT	Severe Thunderstorm Warning	LWX	Carroll	65 min
Aug 16, 10:56 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore	64 min
Aug 16, 8:11 PM EDT	Severe Thunderstorm Warning	LWX	Berkeley	64 min
Aug 16, 8:41 PM EDT	Severe Thunderstorm Warning	LWX	Jefferson	49 min
Aug 16, 11:51 PM EDT	Flash Flood Warning	LWX	Berkeley	114 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2003 Every severe thunderstorm warning in 2003

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.