Alert archive / North Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 77, NWS Blacksburg, VA

July 11, 2021Caswell County, Rockingham County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at Jul 11, 2021, 2:46 PM EDT for Caswell County, Rockingham County, North Carolina. It was in force for 31 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: Jul 11, 2021, 2:46 PM EDT (18:46 UTC)
Expired: Jul 11, 2021, 3:17 PM EDT
In force: 31 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), 100 km from the middle of the area, began a volume at 18:48 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
Jul 11, 2:55 PM EDT	TSTM WND DMG	2 Se Reidsville, NC	SEVERAL TREES DOWN ALONG HIGHWAY 29 EAST OF REIDSVILLE.

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, 6.8 hours before the alert went out and 40 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: 536 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 923 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 52 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

773 
WUUS51 KRNK 111846
SVRRNK
NCC033-157-111945-
/O.NEW.KRNK.SV.W.0077.210711T1846Z-210711T1945Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
246 PM EDT Sun Jul 11 2021

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  Eastern Rockingham County in north central North Carolina...
  Western Caswell County in north central North Carolina...

* Until 345 PM EDT.

* At 246 PM EDT, a severe thunderstorm was located near Reidsville,
  moving northeast at 25 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Reidsville...
  Yanceyville...
  Bethel...
  Camp Springs...
  Mayfield...
  Quick...
  and Ruffin.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for damaging winds. For your safety, move to an
interior room on the lowest floor of a sturdy building. Stay away
from windows.

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 3624 7966 3625 7973 3627 7975 3654 7955
      3654 7948 3644 7930 3625 7951 3625 7953
      3624 7953
TIME...MOT...LOC 1846Z 215DEG 20KT 3628 7962 

HAIL...<.75IN
WIND...60MPH
 
$$

Hanes

1 follow-up statement

828 
WWUS51 KRNK 111917
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
317 PM EDT Sun Jul 11 2021

NCC033-157-111926-
/O.CAN.KRNK.SV.W.0077.000000T0000Z-210711T1945Z/
Rockingham NC-Caswell NC-
317 PM EDT Sun Jul 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
EASTERN ROCKINGHAM AND WESTERN CASWELL COUNTIES IS CANCELLED...
                
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 has been cancelled.

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 3624 7966 3625 7973 3627 7975 3654 7955
      3654 7948 3644 7930 3625 7951 3625 7953
      3624 7953
TIME...MOT...LOC 1914Z 215DEG 20KT 3642 7950 

$$

Hanes

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 8:32 PM EDT	Special Weather Statement	RNK	Surry, Wilkes	58 min
Jul 10, 10:22 PM EDT	Special Weather Statement	RNK	Surry	23 min
Jul 10, 10:49 PM EDT	Special Weather Statement	RNK	Stokes	56 min
Jul 11, 1:27 PM EDT	Special Weather Statement	RNK	Caswell	48 min
Jul 11, 1:38 PM EDT	Severe Thunderstorm Warning	RNK	Caswell	67 min
Jul 11, 2:18 PM EDT	Special Weather Statement	RNK	Caswell	27 min
Jul 11, 3:27 PM EDT	Special Weather Statement	RNK	Ashe	48 min
Jul 11, 3:29 PM EDT	Areal Flood Advisory	RNK	Caswell, Rockingham	87 min
Jul 11, 5:55 PM EDT	Areal Flood Warning	RNK	Ashe	3 hr
Jul 11, 6:22 PM EDT	Special Weather Statement	RNK	Stokes	68 min
Jul 11, 7:11 PM EDT	Areal Flood Advisory	RNK	Rockingham, Stokes	98 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2021 Every 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.