Alert archive / Virginia / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 111, NWS Blacksburg, VA

June 20, 2019Henry County, Patrick County, Pittsylvania County, Virginia; Caswell County, Rockingham County, Stokes County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at Jun 20, 2019, 1:40 PM EDT for Henry County, Patrick County, Pittsylvania County, Virginia; Caswell County, Rockingham County, Stokes County, North Carolina. 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: Jun 20, 2019, 1:40 PM EDT (17:40 UTC)
Expired: Jun 20, 2019, 2:15 PM EDT
In force: 35 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Caswell County, NC, Rockingham County, NC, Stokes County, NC, Henry County, VA, Patrick County, VA, Pittsylvania County, VA

The radar

The Roanoke radar (KFCX), 65 km from the middle of the area, began a volume at 17:42 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 5.7 hours before the alert went out and 54 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: 204 J/kg
Mixed-layer CIN: -63 J/kg
Mixed-layer LCL: 980 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 144 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.2

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 Blacksburg, VA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 20, 11:46 AM EDT, 1 hour 54 minutes earlier.

Area forecast discussion, Jun 20, 11:46 AM EDT, 1 hour 54 minutes before

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Hazardous weather outlook, Jun 20, 3:56 AM EDT, 9 hours 44 minutes before

Hazardous Weather Outlook
National Weather Service Blacksburg VA
356 AM EDT Thu Jun 20 2019

NCZ003>006-019-020-VAZ043-044-058-059-210800-
Surry-Stokes-Rockingham-Caswell-Wilkes-Yadkin-Henry-Pittsylvania-
Halifax-Charlotte-
356 AM EDT Thu Jun 20 2019

This Hazardous Weather Outlook is for north central North Carolina,
northwest North Carolina and south central Virginia.

.DAY ONE...Today and tonight.

Severe thunderstorms will be possible this afternoon into early
evening. The main threat from theses storms will be damaging wind
gusts. Isolated large hail and tornadoes are also possible.
Torrential rains may lead to localized flooding.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

There is a low probability for widespread hazardous weather.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed this afternoon.

NCZ001-002-018-VAZ007-009>020-022>024-032>035-045>047-WVZ042>044-507-
508-210800-
Ashe-Alleghany NC-Watauga-Tazewell-Smyth-Bland-Giles-Wythe-Pulaski-
Montgomery-Grayson-Carroll-Floyd-Craig-Alleghany VA-Bath-Roanoke-
Botetourt-Rockbridge-Patrick-Franklin-Bedford-Amherst-Campbell-
Appomattox-Buckingham-Mercer-Summers-Monroe-Eastern Greenbrier-
Western Greenbrier-
356 AM EDT Thu Jun 20 2019

This Hazardous Weather Outlook is for northwest North Carolina,
central Virginia, south central Virginia, southwest Virginia, west
central Virginia and southeast West Virginia.

.DAY ONE...Today and tonight.

Strong to severe thunderstorms are possible this afternoon. Damaging
wind gusts will be the main threat. Isolated large hail is also
possible. Torrential downpours could lead to localized flooding.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

There is a low probability for widespread hazardous weather.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this afternoon.

In the hours before

Special weather statement, Jun 20, 12:36 PM EDT, 1 hour 4 minutes before

Special Weather Statement
National Weather Service BLACKSBURG VA
1236 PM EDT Thu Jun 20 2019

NCZ003-019-201715-
Surry-Wilkes-
1236 PM EDT Thu Jun 20 2019

...A STRONG THUNDERSTORM WILL AFFECT
... Wilkes and Surry Counties...

At 1236 PM EDT, a strong thunderstorm was located over Buck, moving
east at 30 mph.

Winds in excess of 30 mph and pea size hail are possible with this
storm.

Locations impacted include...
North Wilkesboro, Elkin, Wilkesboro, Ronda and Traphill.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 3628 8131 3640 8104 3638 8103 3637 8098
      3641 8096 3643 8096 3651 8076 3624 8085
      3624 8087 3615 8088 3611 8089 3606 8129
TIME...MOT...LOC 1636Z 258DEG 27KT 3616 8121

16

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 8:04 PM EDT	Special Weather Statement	RNK	Patrick	56 min
Jun 19, 9:11 PM EDT	Special Weather Statement	RNK	Patrick	64 min
Jun 20, 2:06 PM EDT	Severe Thunderstorm Warning	RNK	Halifax, Pittsylvania, City of Danville	69 min
Jun 20, 2:28 PM EDT	Tornado Warning	RNK	Halifax, Pittsylvania	32 min
Jun 20, 3:14 PM EDT	Special Weather Statement	RNK	Mecklenburg	16 min
Jun 20, 12:36 PM EDT	Special Weather Statement	RNK	Wilkes	39 min
Jun 20, 1:05 PM EDT	Severe Thunderstorm Warning	RNK	Stokes, Surry, Wilkes, Yadkin	55 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2019 Severe Thunderstorm Warnings in North Carolina, 2019 Every severe thunderstorm warning in 2019

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.