Alert archive / Virginia / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 254, NWS Baltimore/Washington

August 6, 2016Albemarle County, Nelson County, Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at Aug 6, 2016, 5:40 PM EDT for Albemarle County, Nelson County, Virginia. It was in force for 35 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 6, 2016, 5:40 PM EDT (21:40 UTC)
Expired: Aug 6, 2016, 6:15 PM EDT
In force: 35 min
Issued by: NWS Baltimore/Washington
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Albemarle County, VA, Nelson County, VA

The radar

The Sterling radar (KLWX), 160 km from the middle of the area, began a volume at 21:41 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, 9.7 hours before the alert went out and 104 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: 57 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 678 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 21 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 6, 3:02 PM EDT, 2 hours 38 minutes earlier.

Area forecast discussion, Aug 6, 3:02 PM EDT, 2 hours 38 minutes before

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Hazardous weather outlook, Aug 6, 4:26 PM EDT, 1 hour 14 minutes before

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In the hours before

Local storm report, Aug 6, 3:34 PM EDT, 2 hours 6 minutes before

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Local storm report, Aug 6, 4:06 PM EDT, 1 hour 34 minutes before

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Local storm report, Aug 6, 5:02 PM EDT, 38 minutes before

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Local storm report, Aug 6, 5:07 PM EDT, 33 minutes before

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Local storm report, Aug 6, 5:15 PM EDT, 25 minutes before

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Local storm report, Aug 6, 5:36 PM EDT, 4 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 6, 2:06 PM EDT	Severe Thunderstorm Warning	LWX	Fauquier, Prince William	39 min
Aug 6, 2:37 PM EDT	Special Marine Warning	LWX		113 min
Aug 6, 3:12 PM EDT	Severe Thunderstorm Warning	LWX	Culpeper, Fauquier, Rappahannock	48 min
Aug 6, 3:22 PM EDT	Special Marine Warning	LWX		53 min
Aug 6, 3:36 PM EDT	Severe Thunderstorm Warning	LWX	Culpeper, Madison, Rappahannock	24 min
Aug 6, 4:08 PM EDT	Severe Thunderstorm Warning	LWX	Culpeper, Orange, Spotsylvania, Stafford	52 min
Aug 6, 4:10 PM EDT	Areal Flood Warning	LWX	Albemarle, City of Charlottesville	6 hr
Aug 6, 4:11 PM EDT	Severe Thunderstorm Warning	LWX	Albemarle, City of Charlottesville	49 min
Aug 6, 4:17 PM EDT	Special Marine Warning	LWX		118 min
Aug 6, 4:18 PM EDT	Areal Flood Warning	LWX	Culpeper, Madison, Orange, Rappahannock, Spotsylvania	3 hr
Aug 6, 4:23 PM EDT	Special Marine Warning	LWX		2 hr
Aug 6, 4:51 PM EDT	Special Marine Warning	LWX		114 min
Aug 6, 5:00 PM EDT	Areal Flood Warning	LWX	Albemarle, Augusta, Nelson, Rockingham, City of Waynesboro	3 hr
Aug 6, 5:53 PM EDT	Special Marine Warning	LWX		97 min
Aug 6, 5:58 PM EDT	Areal Flood Warning	LWX	Albemarle, Nelson	3 hr
Aug 6, 6:37 PM EDT	Special Marine Warning	LWX		98 min
Aug 6, 7:10 PM EDT	Special Marine Warning	LWX		95 min
Aug 6, 7:27 PM EDT	Small Craft Advisory	LWX		14 hr

Nearby

Severe Thunderstorm Warnings in Virginia, 2016 Every severe thunderstorm warning in 2016

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.