Alert archive / North Carolina / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 185, NWS Blacksburg, VA
NWS Blacksburg, VA issued this severe thunderstorm warning at Aug 21, 2021, 4:46 PM EDT for Stokes County, North Carolina; Patrick County, Virginia. It was in force for 44 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 21, 2021, 4:46 PM EDT (20:46 UTC)
- Expired
- Aug 21, 2021, 5:30 PM EDT
- In force
- 44 min
- Issued by
- NWS Blacksburg, VA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Stokes County, NC, Patrick County, VA
The radar
The Roanoke radar (KFCX), 54 km from the middle of the area, began a volume at 20:46 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 21, 4:53 PM EDT | HAIL 1 | 7 Sw Stuart, VA |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 8.8 hours before the alert went out and 69 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.
- Mixed-layer CAPE
- 676 J/kg
- Mixed-layer CIN
- -134 J/kg
- Mixed-layer LCL
- 912 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- -24 m²/s²
- 0-3 km storm-relative helicity
- -10 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
243
WUUS51 KRNK 212046
SVRRNK
NCC169-VAC141-212130-
/O.NEW.KRNK.SV.W.0185.210821T2046Z-210821T2130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
446 PM EDT Sat Aug 21 2021
The National Weather Service in BLACKSBURG has issued a
* Severe Thunderstorm Warning for...
Northwestern Stokes County in north central North Carolina...
South central Patrick County in southwestern Virginia...
* Until 530 PM EDT.
* At 446 PM EDT, a severe thunderstorm was located near Ararat,
moving southeast at 10 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Francisco...
and Collinstown.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds, as well as
deadly cloud to ground lightning. For your safety, move to an
interior room on the lowest floor of a sturdy building. Stay away
from windows.
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.
When it is safe to do so, please send your reports of hail of any
size, as well as reports of any wind damage, including downed trees
or large limbs, to the National Weather Service by calling toll free
at 1...8 6 6...2 1 5...4 3 2 4. Reports and pictures can also be
shared on the National Weather Service Blacksburg Facebook page and
on Twitter.
&&
LAT...LON 3651 8044 3655 8044 3655 8046 3660 8048
3669 8040 3655 8009 3646 8042
TIME...MOT...LOC 2046Z 316DEG 8KT 3660 8041
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
PH3 follow-up statements
030
WWUS51 KRNK 212049
SVSRNK
Severe Weather Statement
National Weather Service BLACKSBURG VA
449 PM EDT Sat Aug 21 2021
NCC169-VAC141-212130-
/O.CON.KRNK.SV.W.0185.000000T0000Z-210821T2130Z/
Stokes NC-Patrick VA-
449 PM EDT Sat Aug 21 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR NORTHWESTERN STOKES AND SOUTH CENTRAL PATRICK COUNTIES...
At 449 PM EDT, a severe thunderstorm was located near Collinstown, or
near Ararat, moving southeast at 10 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Francisco...
and Collinstown.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
Prepare immediately for LARGE HAIL AND DAMAGING WINDS, as well as
deadly cloud to ground lightning. For your safety, move to an
interior room on the lowest floor of a sturdy building. Stay away
from windows.
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.
When it is safe to do so, please send your reports of hail of any
size, as well as reports of any wind damage, including downed trees
or large limbs, to the National Weather Service by calling toll free
at 1...8 6 6...2 1 5...4 3 2 4. Reports and pictures can also be
shared on the National Weather Service Blacksburg Facebook page and
on Twitter.
&&
LAT...LON 3651 8044 3655 8044 3655 8046 3659 8047
3667 8037 3655 8009 3646 8042
TIME...MOT...LOC 2049Z 316DEG 8KT 3660 8041
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
PH577
WWUS51 KRNK 212112
SVSRNK
Severe Weather Statement
National Weather Service BLACKSBURG VA
512 PM EDT Sat Aug 21 2021
VAC141-212121-
/O.CAN.KRNK.SV.W.0185.000000T0000Z-210821T2130Z/
Patrick VA-
512 PM EDT Sat Aug 21 2021
...THE SEVERE THUNDERSTORM WARNING FOR
SOUTH CENTRAL PATRICK COUNTY IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3651 8044 3655 8044 3654 8027 3651 8025
3646 8042
TIME...MOT...LOC 2111Z 335DEG 11KT 3653 8038
$$
NCC169-212130-
/O.CON.KRNK.SV.W.0185.000000T0000Z-210821T2130Z/
Stokes NC-
512 PM EDT Sat Aug 21 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR NORTHWESTERN STOKES COUNTY...
At 511 PM EDT, a severe thunderstorm was located west of
Collinstown, or near Francisco, moving southeast at 15 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Francisco...
and Collinstown.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for LARGE HAIL AND DAMAGING WINDS, as well as
deadly cloud to ground lightning. For your safety, move to an
interior room on the lowest floor of a sturdy building. Stay away
from windows.
Locally heavy rain will quickly reduce visibility and result in
ponding of water on roadways, standing water in low lying areas, and
minor flooding of creeks, streams, and areas of poor drainage.
Drivers are urged to slow down and use extra caution to avoid
hydroplaning.
When it is safe to do so, please send your reports of hail of any
size, as well as reports of any wind damage, including downed trees
or large limbs, to the National Weather Service by calling toll free
at 1...8 6 6...2 1 5...4 3 2 4. Reports and pictures can also be
shared on the National Weather Service Blacksburg Facebook page and
on Twitter.
&&
LAT...LON 3651 8044 3655 8044 3654 8027 3651 8025
3646 8042
TIME...MOT...LOC 2111Z 335DEG 11KT 3653 8038
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
PH373
WWUS51 KRNK 212124
SVSRNK
Severe Weather Statement
National Weather Service BLACKSBURG VA
524 PM EDT Sat Aug 21 2021
NCC169-212134-
/O.EXP.KRNK.SV.W.0185.000000T0000Z-210821T2130Z/
Stokes NC-
524 PM EDT Sat Aug 21 2021
...THE SEVERE THUNDERSTORM WARNING FOR
NORTHWESTERN STOKES COUNTY WILL EXPIRE AT 530 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds are still possible with this thunderstorm.
LAT...LON 3651 8044 3655 8044 3654 8027 3651 8025
3646 8042
TIME...MOT...LOC 2124Z 316DEG 8KT 3651 8036
$$
PHThe office that day
Everything else NWS Blacksburg, VA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 9:49 PM EDT | Areal Flood Advisory | RNK | Wilkes | 89 min |
| Aug 21, 3:16 PM EDT | Special Weather Statement | RNK | Alleghany | 44 min |
| Aug 21, 4:00 PM EDT | Special Weather Statement | RNK | Alleghany | 45 min |
| Aug 21, 4:13 PM EDT | Special Weather Statement | RNK | Wilkes | 32 min |
| Aug 21, 4:17 PM EDT | Severe Thunderstorm Warning | RNK | Wilkes | 43 min |
| Aug 21, 5:39 PM EDT | Special Weather Statement | RNK | Yadkin | 36 min |
| Aug 21, 4:28 PM EDT | Special Weather Statement | RNK | Patrick | 32 min |
Nearby
Severe Thunderstorm Warnings in North Carolina, 2021Severe Thunderstorm Warnings in Virginia, 2021Every severe thunderstorm warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.