Alert archive / Maryland / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 99, NWS Baltimore/Washington

July 2, 2014Allegany County, Maryland

NWS Baltimore/Washington issued this severe thunderstorm warning at Jul 2, 2014, 11:44 AM EDT for Allegany County, Maryland. It was in force for 31 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: Jul 2, 2014, 11:44 AM EDT (15:44 UTC)
Expired: Jul 2, 2014, 12:15 PM EDT
In force: 31 min
Issued by: NWS Baltimore/Washington
Area: Storm-based polygon

County Allegany County, MD

The radar

The Sterling radar (KLWX), 127 km from the middle of the area, began a volume at 15:44 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 nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 3.7 hours before the alert went out and 134 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: 672 J/kg
Mixed-layer CIN: -176 J/kg
Mixed-layer LCL: 1272 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: 87 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 Jul 2, 9:30 AM EDT, 2 hours 14 minutes earlier.

Area forecast discussion, Jul 2, 9:30 AM EDT, 2 hours 14 minutes before

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Hazardous weather outlook, Jul 2, 11:11 AM EDT, 33 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 3:24 AM EDT	Heat Advisory	LWX	Arlington, Fairfax, Fauquier, King George, Spotsylvania, Stafford and 4 more	15 hr
Jul 2, 3:33 AM EDT	Small Craft Advisory	LWX		24 hr
Jul 2, 1:59 PM EDT	Small Craft Advisory	LWX		67 hr
Jul 2, 2:30 PM EDT	Severe Thunderstorm Warning	LWX	Clarke, Loudoun	30 min
Jul 2, 2:45 PM EDT	Severe Thunderstorm Warning	LWX	Greene, Page, Rockingham, Shenandoah, City of Harrisonburg	25 min
Jul 2, 2:56 PM EDT	Severe Thunderstorm Warning	LWX	Loudoun	34 min
Jul 2, 3:38 PM EDT	Special Marine Warning	LWX		52 min
Jul 2, 3:42 PM EDT	Severe Thunderstorm Warning	LWX	Clarke, Loudoun	29 min
Jul 2, 3:45 PM EDT	Severe Thunderstorm Warning	LWX	Rockingham	45 min
Jul 2, 3:53 PM EDT	Special Marine Warning	LWX		82 min
Jul 2, 4:20 PM EDT	Severe Thunderstorm Warning	LWX	Culpeper, Fauquier, Prince William, Rappahannock	55 min
Jul 2, 4:55 PM EDT	Special Marine Warning	LWX		65 min
Jul 2, 5:05 PM EDT	Special Marine Warning	LWX		55 min
Jul 2, 5:17 PM EDT	Special Marine Warning	LWX		88 min
Jul 2, 5:42 PM EDT	Special Marine Warning	LWX		93 min
Jul 2, 5:58 PM EDT	Special Marine Warning	LWX		92 min
Jul 2, 6:30 PM EDT	Severe Thunderstorm Warning	LWX	Rappahannock	45 min
Jul 2, 6:43 PM EDT	Severe Thunderstorm Warning	LWX	Augusta, City of Staunton, City of Waynesboro	52 min
Jul 2, 7:01 PM EDT	Severe Thunderstorm Warning	LWX	Culpeper, Rappahannock	44 min
Jul 2, 7:13 PM EDT	Special Marine Warning	LWX		92 min
Jul 2, 7:47 PM EDT	Tornado Warning	LWX	Augusta, Rockingham	28 min
Jul 2, 3:25 AM EDT	Coastal Flood Advisory	LWX	Anne Arundel	9 hr
Jul 2, 4:19 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Charles, Saint Mary's	41 min
Jul 2, 4:52 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Saint Mary's	55 min
Jul 2, 5:23 PM EDT	Severe Thunderstorm Warning	LWX	Harford	52 min
Jul 2, 5:23 PM EDT	Severe Thunderstorm Warning	LWX	Hampshire	52 min
Jul 2, 5:49 PM EDT	Severe Thunderstorm Warning	LWX	Grant, Hardy, Pendleton	45 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2014 Every severe thunderstorm warning in 2014

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.