Alert archive / Virginia / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 46, NWS Baltimore/Washington

May 10, 2004Shenandoah County, Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at May 10, 2004, 2:00 PM EDT for Shenandoah County, Virginia. It was in force for 60 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 10, 2004, 2:00 PM EDT (18:00 UTC)
Expired: May 10, 2004, 3:00 PM EDT
In force: 60 min
Issued by: NWS Baltimore/Washington
Area: Counties, with a storm outline in the text

County Shenandoah County, VA

The radar

The Sterling radar (KLWX), 95 km from the middle of the area, began a volume at 18:00 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, 6.0 hours before the alert went out and 202 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: 35 J/kg
Mixed-layer CIN: -146 J/kg
Mixed-layer LCL: 1486 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 50 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 10, 12:00 PM EDT, 2 hours earlier.

Area forecast discussion, May 10, 12:00 PM EDT, 2 hours before

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Hazardous weather outlook, May 10, 12:06 PM EDT, 1 hour 54 minutes before

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In the hours before

Special weather statement, May 10, 12:21 PM EDT, 1 hour 39 minutes before

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      <div class="status" id="status">Temporary Notice</div>
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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 9, 11:28 PM EDT	Special Marine Warning	LWX		92 min
May 9, 8:11 PM EDT	Severe Thunderstorm Warning	LWX	Harford	34 min
May 9, 11:26 PM EDT	Severe Thunderstorm Warning	LWX	Harford	49 min
May 9, 11:43 PM EDT	Severe Thunderstorm Warning	LWX	Howard, Montgomery	47 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2004 Every severe thunderstorm warning in 2004

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.