Alert archive / West Virginia / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 40, NWS Baltimore/Washington

May 30, 2015Allegany County, Maryland; Hampshire County, Mineral County, West Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at May 30, 2015, 1:43 PM EDT for Allegany County, Maryland; Hampshire County, Mineral County, West Virginia. It was in force for 19 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 30, 2015, 1:43 PM EDT (17:43 UTC)
Expired: May 30, 2015, 2:02 PM EDT
In force: 19 min
Issued by: NWS Baltimore/Washington
Area: Storm-based polygon

Counties Allegany County, MD, Hampshire County, WV, Mineral County, WV

The radar

The Sterling radar (KLWX), 121 km from the middle of the area, began a volume at 17:46 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

Pittsburgh, PA (KAGC), launched 12:00Z, 5.7 hours before the alert went out and 157 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: 32 J/kg
Mixed-layer CIN: -99 J/kg
Mixed-layer LCL: 1028 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 79 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 30, 10:31 AM EDT, 3 hours 12 minutes earlier.

Area forecast discussion, May 30, 10:31 AM EDT, 3 hours 12 minutes before

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Hazardous weather outlook, May 30, 5:21 AM EDT, 8 hours 22 minutes before

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In the hours before

Local storm report, May 30, 9:35 AM EDT, 4 hours 8 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 30, 1:29 AM EDT	Small Craft Advisory	LWX		4 hr
May 30, 4:44 AM EDT	Small Craft Advisory	LWX		67 hr

Nearby

Severe Thunderstorm Warnings in West Virginia, 2015 Severe Thunderstorm Warnings in Maryland, 2015 Every severe thunderstorm warning in 2015

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.