Alert archive / North Carolina / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 135, NWS Blacksburg, VA

July 31, 2020Caswell County, Rockingham County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at Jul 31, 2020, 11:43 PM EDT for Caswell County, Rockingham County, North Carolina. It was in force for 51 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 31, 2020, 11:43 PM EDT (03:43 UTC)
Expired: Aug 1, 2020, 12:34 AM EDT
In force: 51 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Caswell County, NC, Rockingham County, NC

The radar

The Roanoke radar (KFCX), 95 km from the middle of the area, began a volume at 03:47 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

Newport, NC (KMHX), launched 00:00Z, 3.7 hours before the alert went out and 301 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: 2017 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 1030 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.7

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 Blacksburg, VA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 31, 7:27 PM EDT, 4 hours 16 minutes earlier.

Area forecast discussion, Jul 31, 7:27 PM EDT, 4 hours 16 minutes before

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Hazardous weather outlook, Jul 31, 8:45 PM EDT, 2 hours 58 minutes before

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In the hours before

Special weather statement, Jul 31, 9:14 PM EDT, 2 hours 29 minutes before

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Special weather statement, Jul 31, 9:30 PM EDT, 2 hours 13 minutes before

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Special weather statement, Jul 31, 9:46 PM EDT, 1 hour 57 minutes before

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Special weather statement, Jul 31, 10:14 PM EDT, 1 hour 29 minutes before

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Special weather statement, Jul 31, 10:47 PM EDT, 56 minutes before

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Special weather statement, Jul 31, 11:31 PM EDT, 12 minutes before

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The office that day

Everything else NWS Blacksburg, VA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 31, 8:35 PM EDT	Special Weather Statement	RNK	Smyth	40 min
Jul 31, 9:11 PM EDT	Areal Flood Advisory	RNK	Smyth, Tazewell	3 hr
Jul 31, 9:14 PM EDT	Special Weather Statement	RNK	Pittsylvania	31 min
Jul 31, 9:46 PM EDT	Special Weather Statement	RNK	City of Danville	29 min
Jul 31, 10:14 PM EDT	Special Weather Statement	RNK	City of Danville	31 min
Jul 31, 10:47 PM EDT	Special Weather Statement	RNK	City of Danville	28 min
Jul 31, 11:19 PM EDT	Areal Flood Advisory	RNK	Halifax, Pittsylvania	3 hr
Aug 1, 1:55 PM EDT	Special Weather Statement	RNK	Bedford	35 min
Aug 1, 2:25 PM EDT	Special Weather Statement	RNK	Bedford, City of Lynchburg	50 min
Aug 1, 5:44 PM EDT	Special Weather Statement	RNK	Craig	31 min
Aug 1, 6:10 PM EDT	Special Weather Statement	RNK	Alleghany	35 min
Aug 1, 6:27 PM EDT	Special Weather Statement	RNK	Botetourt	33 min
Aug 1, 6:35 PM EDT	Severe Thunderstorm Warning	RNK	Botetourt, Craig, Rockbridge	55 min
Aug 1, 6:46 PM EDT	Tornado Warning Tornado observed	RNK	Botetourt	44 min
Aug 1, 6:52 PM EDT	Special Weather Statement	RNK	Bath	38 min
Aug 1, 7:22 PM EDT	Tornado Warning	RNK	Botetourt, Rockbridge	38 min
Aug 1, 7:28 PM EDT	Special Weather Statement	RNK	City of Covington	32 min
Jul 31, 8:18 PM EDT	Severe Thunderstorm Warning	RNK	Ashe, Watauga, Wilkes	57 min
Jul 31, 9:06 PM EDT	Special Weather Statement	RNK	Wilkes	24 min
Jul 31, 9:30 PM EDT	Special Weather Statement	RNK	Wilkes	45 min
Jul 31, 11:31 PM EDT	Special Weather Statement	RNK	Caswell	29 min
Aug 1, 7:32 PM EDT	Special Weather Statement	RNK	Greenbrier	28 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2020 Every severe thunderstorm warning in 2020

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.