Alert archive / North Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 87, NWS Blacksburg, VA

July 17, 2021Caswell County, Rockingham County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at Jul 17, 2021, 2:56 PM EDT for Caswell County, Rockingham County, North Carolina. It was in force for 49 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 17, 2021, 2:56 PM EDT (18:56 UTC)
Expired: Jul 17, 2021, 3:45 PM EDT
In force: 49 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), 99 km from the middle of the area, began a volume at 18:58 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 17, 3:05 PM EDT	TSTM WND DMG	5 W Camp Springs, NC	SEVERAL TREES DOWN NEAR HIGHWAY 87.

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, 6.9 hours before the alert went out and 45 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: 966 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 843 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 19 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

910 
WUUS51 KRNK 171856
SVRRNK
NCC033-157-171945-
/O.NEW.KRNK.SV.W.0087.210717T1856Z-210717T1945Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
256 PM EDT Sat Jul 17 2021

The National Weather Service in BLACKSBURG has issued a

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

* Until 345 PM EDT.

* At 256 PM EDT, a severe thunderstorm was located near Reidsville,
  moving northeast at 15 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Reidsville...
  Yanceyville...
  Bethel...
  Providence...
  Camp Springs...
  Quick...
  and Blanch.

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.

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

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 3625 7984 3654 7953 3654 7928 3646 7918
      3625 7949 3624 7957
TIME...MOT...LOC 1856Z 223DEG 15KT 3631 7960 

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

RR

2 follow-up statements

104 
WWUS51 KRNK 171929
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
329 PM EDT Sat Jul 17 2021

NCC033-157-171945-
/O.CON.KRNK.SV.W.0087.000000T0000Z-210717T1945Z/
Rockingham NC-Caswell NC-
329 PM EDT Sat Jul 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR
EASTERN ROCKINGHAM AND NORTHWESTERN CASWELL COUNTIES...

At 329 PM EDT, a severe thunderstorm was located over Quick, or near
Bethel, moving northeast at 15 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Reidsville...
Yanceyville...
Bethel...
Providence...
Camp Springs...
Gatewood...
and Quick.

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.

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

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 3654 7953 3654 7928 3646 7918 3625 7949
      3624 7957 3624 7970 3638 7970
TIME...MOT...LOC 1929Z 223DEG 12KT 3639 7950 

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

RR

154 
WWUS51 KRNK 171943
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
343 PM EDT Sat Jul 17 2021

NCC033-157-171953-
/O.EXP.KRNK.SV.W.0087.000000T0000Z-210717T1945Z/
Rockingham NC-Caswell NC-
343 PM EDT Sat Jul 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
EASTERN ROCKINGHAM AND NORTHWESTERN CASWELL COUNTIES WILL EXPIRE AT
345 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 and heavy rain are still possible with this thunderstorm.

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 3654 7953 3654 7928 3646 7918 3625 7949
      3624 7957 3624 7970 3638 7970
TIME...MOT...LOC 1943Z 223DEG 15KT 3643 7946 

$$

RR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 1:06 PM EDT	Special Weather Statement	RNK	Surry	39 min
Jul 17, 1:45 PM EDT	Severe Thunderstorm Warning	RNK	Surry	43 min
Jul 17, 2:11 PM EDT	Areal Flood Advisory	RNK	Surry	3 hr
Jul 17, 2:49 PM EDT	Special Weather Statement	RNK	Caswell	26 min
Jul 17, 3:42 PM EDT	Special Weather Statement	RNK	Caswell, Rockingham	48 min
Jul 17, 3:48 PM EDT	Severe Thunderstorm Warning	RNK	Caswell, Rockingham	57 min
Jul 17, 3:52 PM EDT	Areal Flood Advisory	RNK	Caswell, Rockingham	3 hr
Jul 17, 4:00 PM EDT	Severe Thunderstorm Warning	RNK	Caswell, Rockingham	60 min
Jul 17, 4:11 PM EDT	Flash Flood Warning	RNK	Caswell, Rockingham	3 hr
Jul 17, 5:00 PM EDT	Severe Thunderstorm Warning	RNK	Caswell, Rockingham	60 min
Jul 17, 5:10 PM EDT	Special Weather Statement	RNK	Wilkes	35 min
Jul 17, 5:39 PM EDT	Special Weather Statement	RNK	Wilkes	36 min
Jul 17, 6:02 PM EDT	Special Weather Statement	RNK	Caswell	13 min
Jul 17, 6:08 PM EDT	Special Weather Statement	RNK	Alleghany, Surry, Watauga, Wilkes	67 min
Jul 17, 6:50 PM EDT	Areal Flood Advisory	RNK	Caswell, Rockingham	7 hr
Jul 17, 7:05 PM EDT	Special Weather Statement	RNK	Alleghany, Surry	40 min
Jul 17, 7:10 PM EDT	Areal Flood Advisory	RNK	Alleghany, Surry	3 hr
Jul 17, 7:34 PM EDT	Special Weather Statement	RNK	Yadkin	26 min
Jul 17, 7:44 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Rockingham, Stokes, Surry, Wilkes, Yadkin	61 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.