Alert archive / North Carolina / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 112, NWS Blacksburg, VA

July 22, 2018Caswell County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at Jul 22, 2018, 9:45 PM EDT for Caswell County, North Carolina. It was in force for 45 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 22, 2018, 9:45 PM EDT (01:45 UTC)
Expired: Jul 22, 2018, 10:30 PM EDT
In force: 45 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Caswell County, NC

The radar

The Roanoke radar (KFCX), 109 km from the middle of the area, began a volume at 01:45 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 00:00Z, 1.8 hours before the alert went out and 62 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: 1604 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 1013 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 102 m²/s²
0-3 km storm-relative helicity: 111 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 6.4

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 22, 9:32 PM EDT, 13 minutes earlier.

Area forecast discussion, Jul 22, 9:32 PM EDT, 13 minutes before

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Hazardous weather outlook, Jul 22, 3:23 PM EDT, 6 hours 22 minutes before

Hazardous Weather Outlook
National Weather Service Blacksburg VA
323 PM EDT Sun Jul 22 2018

NCZ001-002-018-019-VAZ007-009>013-015-WVZ042>044-507-508-230900-
Ashe-Alleghany NC-Watauga-Wilkes-Tazewell-Smyth-Bland-Giles-Wythe-
Pulaski-Grayson-Mercer-Summers-Monroe-Eastern Greenbrier-
Western Greenbrier-
323 PM EDT Sun Jul 22 2018

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

.DAY ONE...This afternoon and tonight.

A marginal risk for flash flooding exists across the entire forecast
area, especially this afternoon and tonight. The threat for severe
thunderstorms is low.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

There is a marginal risk for flash flooding Monday and Tuesday,
which may persist even into Wednesday as a deep upper low pressure
area lingers across the Mid- Atlantic region. The threat for severe
thunderstorms is low through the period.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

NCZ006-VAZ046-047-058-059-230900-
Caswell-Appomattox-Buckingham-Halifax-Charlotte-
323 PM EDT Sun Jul 22 2018

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

.DAY ONE...This afternoon and tonight.

A marginal risk for flash flooding and severe thunderstorms exists
across the entire region, especially this afternoon and tonight.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

A marginal to slight risk for flash flooding exists across the
area on Monday and Tuesday and may persist into Wednesday as well.

There is also a marginal threat for severe thunderstorms on Monday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

NCZ003>005-020-VAZ014-016>020-022>024-032>035-043>045-230900-
Surry-Stokes-Rockingham-Yadkin-Montgomery-Carroll-Floyd-Craig-
Alleghany VA-Bath-Roanoke-Botetourt-Rockbridge-Patrick-Franklin-
Bedford-Amherst-Henry-Pittsylvania-Campbell-
323 PM EDT Sun Jul 22 2018

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

.DAY ONE...This afternoon and tonight.

A marginal risk for flash flooding exists across the entire forecast
area, especially this afternoon and tonight. The threat for severe
thunderstorms is low.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

A slight risk for flash flooding exists across the most of the
forecast area Monday and Tuesday, which may persist into Wednesday
as a deep upper low pressure area lingers across the Mid- Atlantic
region. The threat for severe thunderstorms is low through the
period.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Special weather statement, Jul 22, 6:40 PM EDT, 3 hours 5 minutes before

Special Weather Statement
National Weather Service BLACKSBURG VA
640 PM EDT SUN JUL 22 2018

VAZ034-035-045-222345-
Amherst-Campbell-Bedford-
640 PM EDT SUN JUL 22 2018

...A STRONG THUNDERSTORM WILL AFFECT
CENTRAL CAMPBELL...EAST CENTRAL BEDFORD...AND SOUTH CENTRAL AMHERST
COUNTIES AND THE CITY OF LYNCHBURG...

Until 745 PM EDT

At 639 PM EDT, a strong thunderstorm was located near Evington,
moving north at 10 mph.

Torrential rainfall, at a rate of an 1 to 2 inches per hour, is
occurring with this storm, and may cause localized flooding. Do not
drive your vehicle through flooded roadways. Winds in excess of 30
mph and pea size hail are also possible with this storm.

Locations impacted include...
Lynchburg...
Forest...
Evington...
Rustburg...
and Madison Heights.

This includes The following Locations Liberty University and
Lynchburg Airport.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 3717 7911 3720 7933 3749 7930 3746 7902
TIME...MOT...LOC 2239Z 191DEG 11KT 3726 7921

RS

Special weather statement, Jul 22, 7:26 PM EDT, 2 hours 19 minutes before

Special Weather Statement
National Weather Service BLACKSBURG VA
726 PM EDT SUN JUL 22 2018

VAZ047-230030-
Buckingham-
726 PM EDT SUN JUL 22 2018

...A STRONG THUNDERSTORM WILL AFFECT
NORTHEASTERN BUCKINGHAM COUNTY...

Until 830 PM EDT

At 725 PM EDT, a strong thunderstorm was located near Dillwyn, moving
north at 10 mph.

Winds in excess of 40 mph and pea size hail are possible with this
storm.

Locations impacted include...
Buckingham...
Dillwyn...
Gold Hill...
Centenary...
and New Canton.

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 3752 7838 3751 7855 3774 7865 3776 7861
      3775 7858 3776 7855 3776 7851 3777 7850
      3779 7850 3779 7848 3776 7847 3775 7844
      3773 7836 3772 7834 3771 7830
TIME...MOT...LOC 2325Z 188DEG 10KT 3758 7848

RS

Special weather statement, Jul 22, 7:58 PM EDT, 1 hour 47 minutes before

Special Weather Statement
National Weather Service BLACKSBURG VA
758 PM EDT SUN JUL 22 2018

NCZ004-230030-
Stokes-
758 PM EDT SUN JUL 22 2018

...A STRONG THUNDERSTORM WILL AFFECT
SOUTHEASTERN STOKES COUNTY...

Until 830 PM EDT

At 758 PM EDT, a strong thunderstorm was located near Germanton,
moving north at 15 mph.

Wind gusts up to 50 mph and half inch hail are possible with this
storm.

Locations impacted include...
Walnut Cove...
Danbury...
Pine Hall...
Dillard...
and Hanging Rock State Park.

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 3626 8026 3646 8027 3646 8003 3628 8003
      3626 8004
TIME...MOT...LOC 2358Z 168DEG 13KT 3623 8017

RS

Special weather statement, Jul 22, 8:31 PM EDT, 1 hour 14 minutes before

Special Weather Statement
National Weather Service BLACKSBURG VA
831 PM EDT SUN JUL 22 2018

VAZ058-230100-
Halifax-
831 PM EDT SUN JUL 22 2018

...A STRONG THUNDERSTORM WILL AFFECT
SOUTHWESTERN HALIFAX COUNTY...

Until 900 PM EDT

At 831 PM EDT, a strong thunderstorm was located over South Boston,
moving north at 20 mph.

Wind gusts up to 50 mph and dime size hail are possible with this
storm.

Locations impacted include...
South Boston...
Halifax...
Scottsburg...
Cluster Springs...
and Crystal Hill.

LAT...LON 3664 7872 3658 7894 3681 7907 3689 7879
TIME...MOT...LOC 0031Z 162DEG 17KT 3668 7886

RS

Local storm report, Jul 22, 9:37 PM EDT, 8 minutes before

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Local storm report, Jul 22, 9:40 PM EDT, 5 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 22, 8:31 PM EDT	Special Weather Statement	RNK	Halifax	29 min
Jul 22, 8:47 PM EDT	Severe Thunderstorm Warning	RNK	Halifax	42 min
Jul 22, 9:08 PM EDT	Severe Thunderstorm Warning	RNK	Franklin, Henry, Patrick, Pittsylvania, City of Danville, City of Martinsville	67 min
Jul 22, 9:53 PM EDT	Special Weather Statement	RNK	Bedford	37 min
Jul 22, 10:16 PM EDT	Special Weather Statement	RNK	Pittsylvania, City of Danville	44 min
Jul 22, 10:56 PM EDT	Special Weather Statement	RNK	Appomattox, Campbell	49 min
Jul 22, 10:59 PM EDT	Special Weather Statement	RNK	Roanoke, City of Roanoke, City of Salem	46 min
Jul 22, 11:05 PM EDT	Special Weather Statement	RNK	Halifax	25 min
Jul 22, 11:12 PM EDT	Special Weather Statement	RNK	Charlotte	18 min
Jul 22, 11:14 PM EDT	Special Weather Statement	RNK	Buckingham	46 min
Jul 22, 11:38 PM EDT	Special Weather Statement	RNK	City of Lynchburg	37 min
Jul 22, 11:59 PM EDT	Special Weather Statement	RNK	Amherst	46 min
Jul 23, 12:03 AM EDT	Special Weather Statement	RNK	Buckingham	57 min
Jul 23, 12:12 AM EDT	Special Weather Statement	RNK	Amherst	33 min
Jul 23, 7:49 AM EDT	Special Weather Statement	RNK	Botetourt	41 min
Jul 23, 1:30 PM EDT	Special Weather Statement	RNK	Giles	45 min
Jul 23, 2:31 PM EDT	Special Weather Statement	RNK	Giles	59 min
Jul 23, 2:45 PM EDT	Flash Flood Watch	RNK	Amherst, Appomattox, Bedford, Botetourt, Buckingham, Campbell and 23 more	14 hr
Jul 23, 5:28 PM EDT	Special Weather Statement	RNK	City of Danville	32 min
Jul 23, 5:57 PM EDT	Special Weather Statement	RNK	Pittsylvania	33 min
Jul 23, 6:26 PM EDT	Special Weather Statement	RNK	Pittsylvania	34 min
Jul 23, 6:29 PM EDT	Special Weather Statement	RNK	Halifax	31 min
Jul 22, 8:15 PM EDT	Severe Thunderstorm Warning	RNK	Caswell, Rockingham, Stokes	75 min
Jul 22, 10:31 PM EDT	Special Weather Statement	RNK	Caswell	29 min
Jul 23, 6:46 PM EDT	Special Weather Statement	RNK	Stokes, Surry, Wilkes, Yadkin	59 min
Jul 23, 7:41 PM EDT	Special Weather Statement	RNK	Alleghany	64 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2018 Every severe thunderstorm warning in 2018

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.