Alert archive / Virginia / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 222, NWS Blacksburg, VA

September 9, 2023Carroll County, Patrick County, Virginia; Surry County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at Sep 9, 2023, 1:41 PM EDT for Carroll County, Patrick County, Virginia; Surry County, North Carolina. It was in force for 64 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: Sep 9, 2023, 1:41 PM EDT (17:41 UTC)
Expired: Sep 9, 2023, 2:45 PM EDT
In force: 64 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Surry County, NC, Carroll County, VA, Patrick County, VA

The radar

The Roanoke radar (KFCX), 53 km from the middle of the area, began a volume at 17:44 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

Roanoke, VA (KRNK), launched 12:00Z, 5.7 hours before the alert went out and 116 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: 800 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 764 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 58 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

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 Sep 9, 1:31 PM EDT, 10 minutes earlier.

Area forecast discussion, Sep 9, 1:31 PM EDT, 10 minutes before

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Hazardous weather outlook, Sep 9, 5:53 AM EDT, 7 hours 48 minutes before

Hazardous Weather Outlook
National Weather Service Blacksburg VA
553 AM EDT Sat Sep 9 2023

NCZ001>004-018>020-VAZ007-009>020-022>024-032>035-043-WVZ042>044-507-
508-101000-
Ashe-Alleghany NC-Surry-Stokes-Watauga-Wilkes-Yadkin-Tazewell-Smyth-
Bland-Giles-Wythe-Pulaski-Montgomery-Grayson-Carroll-Floyd-Craig-
Alleghany VA-Bath-Roanoke-Botetourt-Rockbridge-Patrick-Franklin-
Bedford-Amherst-Henry-Mercer-Summers-Monroe-Eastern Greenbrier-
Western Greenbrier-
553 AM EDT Sat Sep 9 2023

...FLOOD WATCH IN EFFECT FROM NOON EDT TODAY THROUGH LATE TONIGHT...

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

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flood Watch.

Additionally, some storms this afternoon and evening may contain
strong to damaging wind gusts.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Showers and thunderstorms may bring locally heavy rainfall to the
area Sunday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed. Reports should be submitted by
phone by calling 1-866-215-4324, social media, by email at
rnk.skywarn@noaa.gov or online at www.weather.gov/rnk.

NCZ005-006-VAZ044>047-058-059-101000-
Rockingham-Caswell-Pittsylvania-Campbell-Appomattox-Buckingham-
Halifax-Charlotte-
553 AM EDT Sat Sep 9 2023

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

.DAY ONE...Today and tonight.

Showers and thunderstorms may bring locally heavy rainfall to the
area today and tonight. A few of these storms may contain strong to
damaging wind gusts.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Showers and thunderstorms may bring locally heavy rainfall to the
area Sunday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed. Reports should be submitted by
phone by calling 1-866-215-4324, social media, by email at
rnk.skywarn@noaa.gov or online at www.weather.gov/rnk.

In the hours before

Special weather statement, Sep 9, 11:00 AM EDT, 2 hours 41 minutes before

Special Weather Statement
National Weather Service BLACKSBURG VA
1100 AM EDT Sat Sep 9 2023

NCZ006-VAZ044-058-059-091600-
Caswell NC-Halifax VA-Pittsylvania VA-Charlotte VA-
1100 AM EDT Sat Sep 9 2023

...A large area of THUNDERSTORMS WITH VERY HEAVY RAINFALL AND
FREQUENT CLOUD-TO-GROUND LIGHTNING WILL IMPACT CASWELL...
CHARLOTTE...EASTERN PITTSYLVANIA AND HALIFAX COUNTIES THROUGH NOON
EDT...

At 1056 AM EDT, Doppler radar was tracking a cluster of strong
thunderstorms with heavy rainfall and frequent cloud-to-ground
lightning along a line extending from Yanceyville to Bethel to
Hitesburg moving north at 35 mph.

HAZARD...Wind gusts up to 40 mph. Frequent cloud-to-ground
         lightning. Very heavy rainfall.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Cloud-to-ground lightning is dangerous.
         Heavy rainfall may lead to flooding.

Locations impacted include...
South Boston...
Halifax...
Redoak...
Turbeville...
Clover...
Milton...
and Scottsburg.

Those attending any outdoor events or venues in Halifax or
surrounding counties are in the path of these storms and should
prepare for IMMINENT DANGEROUS WEATHER CONDITIONS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Locally heavy rain will quickly reduce visibility and result in
ponding of water on roadways, standing water in low lying areas, and
minor flooding of creeks, streams, and areas of poor drainage.
Drivers are urged to slow down and use extra caution to avoid
hydroplaning.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3670 7865 3663 7855 3669 7865 3669 7868
      3668 7870 3654 7873 3654 7914 3630 7915
      3628 7922 3669 7936 3688 7851
TIME...MOT...LOC 1456Z 164DEG 32KT 3643 7922 3661 7854

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

RAB

Special weather statement, Sep 9, 12:01 PM EDT, 1 hour 40 minutes before

Special Weather Statement
National Weather Service BLACKSBURG VA
1201 PM EDT Sat Sep 9 2023

NCZ001>003-019-VAZ010>017-091700-
Surry NC-Ashe NC-Wilkes NC-Alleghany NC-Giles VA-Grayson VA-
Pulaski VA-Bland VA-Wythe VA-Floyd VA-Montgomery VA-Carroll VA-
1201 PM EDT Sat Sep 9 2023

...SCATTERED THUNDERSTORMS ARE DEVELOPING ACROSS SEVERAL COUNTIES IN
SOUTHWEST VIRGINIA.  INDIVIDUAL THUNDERSTORMS MAY BECOME STRONG AND
PRODUCE WIND GUSTS TO 40 MPH, SMALL HAIL, VERY HEAVY RAINFALL, AND
FREQUENT CLOUD-TO-GROUND LIGHTNING. THE STORMS WILL GENERALLY MOVE
NORTHWARD AROUND 20 MPH.

At 1157 AM EDT, Doppler radar was tracking a cluster of scattered
strong thunderstorms from northwest North Carolina, including Ashe
and Alleghany counties northeast to Montgomery County VA.  Other
counties included within this advisory are Wilkes and Surry counties
in North Carolina and Grayson, Carroll, Floyd, Wythe, Pulaski, and
Giles counties in southwest Virginia as well as the independent city
of Galax in southwest Virginia.

HAZARD...Wind gusts up to 40 mph and pea size hail with the stronger
         storms. Frequent dangerous cloud-to-ground lightning. Very
         heavy rainfall.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible. Dangerous lightning strikes. Minor flooding.

Locations impacted include...
Blacksburg...
Christiansburg...
Radford...
Pulaski...
Wytheville...
Galax...
and Elkin.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Locally heavy rain will quickly reduce visibility and result in
ponding of water on roadways, standing water in low lying areas, and
minor flooding of creeks, streams, and areas of poor drainage.
Drivers are urged to slow down and use extra caution to avoid
hydroplaning.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

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 3633 8161 3636 8165 3675 8134 3677 8126
      3682 8128 3692 8120 3738 8067 3723 8019
      3718 8018 3675 8048 3665 8055 3665 8060
      3650 8065 3625 8082 3624 8087 3614 8090
TIME...MOT...LOC 1557Z 199DEG 17KT 3667 8106

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

RAB

Special weather statement, Sep 9, 12:26 PM EDT, 1 hour 15 minutes before

Special Weather Statement
National Weather Service BLACKSBURG VA
1226 PM EDT Sat Sep 9 2023

NCZ005-VAZ032>034-043>046-058-059-091730-
Rockingham NC-Henry VA-Franklin VA-Halifax VA-Patrick VA-Campbell VA-
Bedford VA-Pittsylvania VA-Charlotte VA-Appomattox VA-
1226 PM EDT Sat Sep 9 2023

...STRONG THUNDERSTORMS WILL IMPACT NORTHWESTERN
ROCKINGHAM...SOUTHERN APPOMATTOX...NORTHERN CHARLOTTE...
CAMPBELL...PITTSYLVANIA...HALIFAX...SOUTH CENTRAL BEDFORD...HENRY...
FRANKLIN AND NORTHEASTERN PATRICK COUNTIES as well as the city OF
MARTINSVILLE THROUGH 130 PM EDT...

At 1223 PM EDT, Doppler radar was tracking a large area of strong
thunderstorms along a line extending from near Ridgeway to Danville
to Nathalie to Charlotte Couort House. Movement was north at 30 mph.

HAZARD...Wind gusts up to 40 mph and pea size hail. Frequent
         dangerous cloud-to-ground lightning. Very heavy rainfall.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible. Dangerous cloud-to-ground lightning. Minor
         flooding.

Locations impacted include...
Eden...
Martinsville...
Rocky Mount...
Altavista...
Appomattox...
Hurt...
and Chatham.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Locally heavy rain will quickly reduce visibility and result in
ponding of water on roadways, standing water in low lying areas, and
minor flooding of creeks, streams, and areas of poor drainage.
Drivers are urged to slow down and use extra caution to avoid
hydroplaning.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

These storms 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 3642 7993 3686 8023 3746 7876 3729 7866
      3726 7868 3720 7869 3719 7864 3716 7862
      3714 7858 3715 7857 3707 7853
TIME...MOT...LOC 1623Z 186DEG 57KT 3653 7985 3711 7861

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

RAB

Special weather statement, Sep 9, 1:11 PM EDT, 30 minutes before

Special Weather Statement
National Weather Service BLACKSBURG VA
111 PM EDT Sat Sep 9 2023

NCZ002>004-019-020-VAZ010>019-032-WVZ042>044-507-508-091815-
Surry NC-Wilkes NC-Alleghany NC-Stokes NC-Yadkin NC-Grayson VA-
Pulaski VA-Patrick VA-Wythe VA-Floyd VA-Carroll VA-Alleghany VA-
Giles VA-Bland VA-Montgomery VA-Craig VA-Western Greenbrier WV-
Summers WV-Eastern Greenbrier WV-Monroe WV-Mercer WV-
111 PM EDT Sat Sep 9 2023

...A STRONG THUNDERSTORM WILL IMPACT
WESTERN STOKES COUNTY IN NORTH CENTRAL NORTH CAROLINA...YADKIN...
ALLEGHANY...SURRY AND WILKES COUNTIES IN NORTHWESTERN NORTH
CAROLINA...PULASKI...GILES...WESTERN CRAIG...FLOYD AND CARROLL
COUNTIES IN SOUTHWESTERN VIRGINIA...SOUTHWESTERN ALLEGHANY COUNTY IN
WEST CENTRAL VIRGINIA...EASTERN BLAND...CENTRAL WYTHE...EASTERN
GRAYSON...WESTERN PATRICK AND MONTGOMERY COUNTIES IN SOUTHWESTERN
VIRGINIA...SOUTHERN GREENBRIER...SUMMERS...EASTERN MERCER AND MONROE
COUNTIES IN SOUTHEASTERN WEST VIRGINIA...THE CITY OF RADFORD AND THE
CITY OF GALAX THROUGH 215 PM EDT...

At 104 PM EDT, Doppler radar was tracking a strong thunderstorm over
Merrimac, or over Blacksburg, moving north at 20 mph.

HAZARD...Pea size hail.

SOURCE...Radar indicated.

IMPACT...Minor hail damage to vegetation is possible.

Locations impacted include...
Blacksburg...
Christiansburg...
Radford...
Alleghany...
Mount Airy...
Pulaski...
and Wytheville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3769 8099 3772 8095 3768 8088 3782 8094
      3787 8075 3795 8081 3800 8078 3794 8015
      3736 8022 3734 8026 3728 8023 3626 8035
      3626 8045 3614 8044 3611 8051 3605 8050
      3603 8125
TIME...MOT...LOC 1704Z 168DEG 19KT 3720 8044

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...<30 MPH

RAB

Local storm report, Sep 9, 1:32 PM EDT, 9 minutes before

Preliminary Local Storm Report
National Weather Service Blacksburg VA
132 PM EDT Sat Sep 9 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0111 PM     Hail             1 NNE Merrimac          37.21N 80.41W
09/09/2023  E0.75 inch       Montgomery         VA   Official NWS Obs

            Hail from 1/4 to 3/4 inch for at least 5
            solid minutes observed at the National
            Weather Service Office in Blacksburg.

&&

RAB

Local storm report, Sep 9, 1:35 PM EDT, 6 minutes before

Preliminary Local Storm Report
National Weather Service Blacksburg VA
135 PM EDT Sat Sep 9 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0110 PM     Hail             1 S Blacksburg          37.22N 80.42W
09/09/2023  E0.88 inch       Montgomery         VA   Emergency Mngr

            The Virginia Tech Emergency Manager reported
            that hail damaged the scoreboard at Lane
            Stadium on the Virginia Tech Campus. Hail
            size was unknown but was observed as 1/2 to
            3/4 inch nearby at the Blacksburg NWS
            Office.

&&

RAB

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 8, 8:11 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Bedford, Campbell, City of Lynchburg	50 min
Sep 8, 9:31 PM EDT	Flash Flood Warning	RNK	Tazewell	2 hr
Sep 9, 3:19 AM EDT	Flood Watch	RNK	Alleghany, Amherst, Bath, Bedford, Bland, Botetourt and 23 more	23 hr
Sep 9, 11:00 AM EDT	Special Weather Statement	RNK	Halifax	60 min
Sep 9, 11:37 AM EDT	Severe Thunderstorm Warning	RNK	Charlotte, Halifax, Pittsylvania, City of Danville	53 min
Sep 9, 12:01 PM EDT	Special Weather Statement	RNK	Carroll, Giles, Grayson, Montgomery, Pulaski, Wythe and 2 more	59 min
Sep 9, 12:26 PM EDT	Special Weather Statement	RNK	Appomattox, Campbell, Franklin, Henry, Pittsylvania, City of Martinsville	64 min
Sep 9, 1:11 PM EDT	Special Weather Statement	RNK	Carroll, Craig, Floyd, Giles, Montgomery, Pulaski and 3 more	64 min
Sep 9, 1:16 PM EDT	Severe Thunderstorm Warning	RNK	Craig, Montgomery, Roanoke	44 min
Sep 9, 1:19 PM EDT	Severe Thunderstorm Warning	RNK	Henry, Patrick, City of Martinsville	41 min
Sep 9, 1:26 PM EDT	Severe Thunderstorm Warning	RNK	Giles	64 min
Sep 9, 2:04 PM EDT	Areal Flood Advisory	RNK	Montgomery, Pulaski, City of Radford	3 hr
Sep 9, 2:48 PM EDT	Flash Flood Warning	RNK	Montgomery, Roanoke	3 hr
Sep 9, 5:44 PM EDT	Areal Flood Advisory	RNK	Tazewell	3 hr
Sep 9, 9:29 AM EDT	Areal Flood Advisory	RNK	Watauga	110 min
Sep 9, 11:40 AM EDT	Severe Thunderstorm Warning	RNK	Rockingham, Stokes	65 min
Sep 9, 11:51 AM EDT	Severe Thunderstorm Warning	RNK	Caswell, Rockingham	28 min
Sep 9, 2:12 PM EDT	Areal Flood Advisory	RNK	Surry, Wilkes, Yadkin	3 hr
Sep 9, 2:43 PM EDT	Special Weather Statement	RNK	Wilkes, Yadkin	62 min
Sep 9, 3:25 PM EDT	Areal Flood Advisory	RNK	Surry, Yadkin	2 hr
Sep 9, 3:29 PM EDT	Flash Flood Warning	RNK	Surry, Wilkes, Yadkin	2 hr

Nearby

Severe Thunderstorm Warnings in Virginia, 2023 Severe Thunderstorm Warnings in North Carolina, 2023 Every severe thunderstorm warning in 2023

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.