Alert archive / North Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 97, NWS Raleigh, NC

August 1, 20214 counties in North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at Aug 1, 2021, 5:51 AM EDT for 4 counties in North Carolina. It was in force for 39 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
Aug 1, 2021, 5:51 AM EDT (09:51 UTC)
Expired
Aug 1, 2021, 6:30 AM EDT
In force
39 min
Issued by
NWS Raleigh, NC
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Davidson County, NC, Forsyth County, NC, Guilford County, NC, Randolph County, NC

The radar

The Roanoke radar (KFCX), 126 km from the middle of the area, began a volume at 09:53 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

TimeReportWhereRemark
Aug 1, 5:52 AM EDTTSTM WND DMG3 Sse Clemmons, NCTREE DOWN ON HAMPTON ROAD.
Aug 1, 6:05 AM EDTTSTM WND DMG2 E Clemmons, NCTREE DOWN IN CELMMONS ON IDOLS ROAD.

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 00:00Z, 9.9 hours before the alert went out and 46 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-pSkew-T log-p diagram, Greensboro/Hi Pt, NC at 00:00Z on 2021-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 36 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Greensboro/Hi Pt, NC at 00:00Z on 2021-08-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
36 J/kg
Mixed-layer CIN
-24 J/kg
Mixed-layer LCL
1676 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
119 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

142 
WUUS52 KRAH 010951
SVRRAH
NCC057-067-081-151-011030-
/O.NEW.KRAH.SV.W.0097.210801T0951Z-210801T1030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Raleigh NC
551 AM EDT Sun Aug 1 2021

The National Weather Service in Raleigh has issued a

* Severe Thunderstorm Warning for...
  Southeastern Forsyth County in central North Carolina...
  Northern Davidson County in central North Carolina...
  Northwestern Randolph County in central North Carolina...
  Western Guilford County in central North Carolina...

* Until 630 AM EDT.

* At 550 AM EDT, severe thunderstorms were located along a line
  extending from near Winston-Salem to near Mocksville, moving east
  at 25 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...
  Greensboro, Winston-Salem, High Point, Lexington, Thomasville,
  Kernersville, Clemmons, Archdale, Trinity and Jamestown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3584 8048 3583 8046 3584 8045 3583 8043
      3585 8042 3584 8040 3585 8039 3587 8039
      3588 8042 3589 8041 3589 8037 3596 8038
      3599 8042 3611 8030 3619 7966 3573 8009
      3583 8049
TIME...MOT...LOC 0950Z 266DEG 22KT 3606 8030 3591 8046 

HAIL...1.00IN
WIND...60MPH
 
$$

Green
2 follow-up statements
061 
WWUS52 KRAH 011013
SVSRAH

Severe Weather Statement
National Weather Service Raleigh NC
613 AM EDT Sun Aug 1 2021

NCC057-067-081-151-011030-
/O.CON.KRAH.SV.W.0097.000000T0000Z-210801T1030Z/
Forsyth NC-Davidson NC-Randolph NC-Guilford NC-
613 AM EDT Sun Aug 1 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 AM EDT
FOR SOUTHEASTERN FORSYTH...NORTHEASTERN DAVIDSON...NORTHWESTERN
RANDOLPH AND WESTERN GUILFORD COUNTIES...

At 612 AM EDT, severe thunderstorms were located along a line
extending from near Kernersville to 7 miles north of Lexington,
moving east at 25 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated. At 6am, multiple trees were reported down 
         in Forsyth County.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Greensboro, Winston-Salem, High Point, Lexington, Thomasville,
Kernersville, Archdale, Trinity, Jamestown and Gordontown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3612 8021 3619 7966 3573 8009 3579 8033
      3590 8034
TIME...MOT...LOC 1012Z 263DEG 23KT 3615 7999 3591 8021 

HAIL...1.00IN
WIND...60MPH
 
$$

Green
444 
WWUS52 KRAH 011026
SVSRAH

Severe Weather Statement
National Weather Service Raleigh NC
626 AM EDT Sun Aug 1 2021

NCC057-067-081-151-011036-
/O.EXP.KRAH.SV.W.0097.000000T0000Z-210801T1030Z/
Forsyth NC-Davidson NC-Randolph NC-Guilford NC-
626 AM EDT Sun Aug 1 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN FORSYTH...
NORTHEASTERN DAVIDSON...NORTHWESTERN RANDOLPH AND WESTERN GUILFORD
COUNTIES WILL EXPIRE AT 630 AM EDT...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Raleigh.

LAT...LON 3612 8021 3619 7966 3573 8009 3579 8033
      3590 8034
TIME...MOT...LOC 1026Z 266DEG 22KT 3616 7988 3592 8010 

$$

Green

The office that day

Everything else NWS Raleigh, NC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 1, 5:33 AM EDTSpecial Weather StatementRAHGuilford57 min
Aug 1, 6:27 AM EDTSpecial Weather StatementRAHAlamance, Guilford63 min
Aug 1, 7:10 AM EDTSevere Thunderstorm WarningRAHAlamance, Durham, Orange50 min
Aug 1, 7:13 AM EDTSpecial Weather StatementRAHPerson47 min
Aug 1, 8:00 AM EDTSpecial Weather StatementRAHGranville45 min
Aug 1, 8:05 AM EDTSpecial Weather StatementRAHVance55 min
Aug 1, 12:56 PM EDTSpecial Weather StatementRAHEdgecombe, Nash, Wilson64 min
Aug 1, 1:08 PM EDTSpecial Weather StatementRAHForsyth52 min
Aug 1, 1:12 PM EDTSpecial Weather StatementRAHJohnston48 min
Aug 1, 1:22 PM EDTSevere Thunderstorm WarningRAHEdgecombe, Johnston, Nash, Wake, Wayne, Wilson38 min
Aug 1, 1:31 PM EDTSevere Thunderstorm WarningRAHJohnston, Sampson, Wayne44 min
Aug 1, 2:00 PM EDTSevere Thunderstorm WarningRAHJohnston, Wayne, Wilson45 min
Aug 1, 2:07 PM EDTSpecial Weather StatementRAHChatham, Randolph53 min
Aug 1, 2:15 PM EDTSevere Thunderstorm WarningRAHWayne30 min
Aug 1, 2:42 PM EDTSevere Thunderstorm WarningRAHChatham, Randolph48 min
Aug 1, 3:03 PM EDTSpecial Weather StatementRAHAnson, Hoke, Richmond, Scotland57 min
Aug 1, 3:18 PM EDTSevere Thunderstorm WarningRAHAnson, Hoke, Richmond, Scotland42 min
Aug 1, 3:51 PM EDTSpecial Weather StatementRAHSampson54 min
Aug 1, 3:51 PM EDTSpecial Weather StatementRAHCumberland54 min
Aug 1, 4:00 PM EDTTornado WarningRAHCumberland30 min
Aug 1, 4:28 PM EDTSpecial Weather StatementRAHJohnston62 min
Aug 1, 4:53 PM EDTSpecial Weather StatementRAHSampson67 min
Aug 1, 5:09 PM EDTSpecial Weather StatementRAHSampson36 min
Aug 1, 5:28 PM EDTSpecial Weather StatementRAHWayne32 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 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.