Alert archive / North Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 30, NWS Blacksburg, VA

April 9, 2021Stokes County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at Apr 9, 2021, 4:35 PM EDT for Stokes County, North Carolina. It was in force for 55 min. 2 reports 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: Apr 9, 2021, 4:35 PM EDT (20:35 UTC)
Expired: Apr 9, 2021, 5:30 PM EDT
In force: 55 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Tornado: Possible
Hail: 1.75 in
Wind: 60.0 mph

County Stokes County, NC

The radar

The Roanoke radar (KFCX), 62 km from the middle of the area, began a volume at 20:36 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
Apr 9, 4:45 PM EDT	HAIL 1	1 W Francisco, NC	AN INCH AND A HALF DEEP, REPORTED BY MIDSUMMER BREWING.
Apr 9, 5:16 PM EDT	HAIL 0.25	Lawsonville, NC

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 9, 3:38 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 8.6 hours before the alert went out and 58 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: 361 J/kg
Mixed-layer CIN: -86 J/kg
Mixed-layer LCL: 1047 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 70 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

705 
WUUS51 KRNK 092035 RRA
SVRRNK
NCC169-092130-
/O.NEW.KRNK.SV.W.0030.210409T2035Z-210409T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
435 PM EDT Fri Apr 9 2021

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  Northwestern Stokes County in north central North Carolina...

* Until 530 PM EDT.

* At 434 PM EDT, a severe thunderstorm was located over Westfield, or
  near Francisco, moving east at 30 mph.

  HAZARD...Golf ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* Locations impacted include...
  Danbury...
  Francisco...
  Collinstown...
  Hanging Rock State Park...
  Capella...
  and Vade Mecum.

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.

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

This storm has consistently indicate rotation indicative of a 
tornado. A tornado could occur at any moment prompting the issuance
of a tornado warning. A tornado warning remains in effect for
northeastern Surry county until 445 PM EDT.

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 3655 8044 3654 8013 3637 8020 3634 8045
TIME...MOT...LOC 2034Z 273DEG 25KT 3647 8043 

TORNADO...POSSIBLE
HAIL...1.75IN
WIND...60MPH
 
$$

RAB

1 follow-up statement

222 
WWUS51 KRNK 092059 RRA
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
459 PM EDT Fri Apr 9 2021

NCC169-092130-
/O.CON.KRNK.SV.W.0030.000000T0000Z-210409T2130Z/
Stokes NC-
459 PM EDT Fri Apr 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR NORTHERN STOKES COUNTY...

At 458 PM EDT, a severe thunderstorm was located near Danbury, moving
east at 30 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

Locations impacted include...
Danbury...
Francisco...
Collinstown...
Hanging Rock State Park...
and Vade Mecum.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail, 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.

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 3637 8024 3643 8038 3655 8037 3654 8013
      3637 8020
TIME...MOT...LOC 2058Z 273DEG 25KT 3646 8022 

HAIL...1.00IN
WIND...<50MPH
 
$$

RAB

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 3:28 PM EDT	Severe Thunderstorm Warning	RNK	Surry	47 min
Apr 9, 4:11 PM EDT	Severe Thunderstorm Warning	RNK	Surry	49 min
Apr 9, 4:20 PM EDT	Tornado Warning	RNK	Surry	25 min
Apr 9, 6:00 PM EDT	Special Weather Statement	RNK	Rockingham	45 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.