Alert archive / North Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 52, NWS Raleigh, NC

May 10, 2021Forsyth County, Guilford County, North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at May 10, 2021, 3:19 PM EDT for Forsyth County, Guilford County, North Carolina. It was in force for 41 min. 4 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
May 10, 2021, 3:19 PM EDT (19:19 UTC)
Expired
May 10, 2021, 4:00 PM EDT
In force
41 min
Issued by
NWS Raleigh, NC
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Forsyth County, NC, Guilford County, NC

The radar

The Roanoke radar (KFCX), 111 km from the middle of the area, began a volume at 19:21 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
May 10, 3:19 PM EDTHAIL 11 Nnw Kernersville, NCQUARTER SIZED HAIL REPORTED IN KERNERSVILLE NEAR THE INTERSECTION OF W MOUNTAIN ST AND OAKHURST ST. LASTED ABOUT 4 MINUTES.
May 10, 3:44 PM EDTHAIL 14 Wsw Greensboro, NCQUARTER SIZE HAIL REPORTED JUST WEST OF GREENSBORO. REPORTED VIA MPING.
May 10, 3:47 PM EDTHAIL 12 Sw Greensboro, NCPUBLIC REPORTED QUARTER SIZE HAIL IN WEST GREENSBORO. REPORTED VIA MPING.
May 10, 3:50 PM EDTTSTM WND GST 524 Wsw Greensboro, NCMEASURED AT GUILFORD COUNTY EM WEATHERSTEM SITE.

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, 7.3 hours before the alert went out and 8 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 12:00Z on 2021-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 28 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Greensboro/Hi Pt, NC at 12:00Z on 2021-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 196 square meters per square second.1939587897Sfc1 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
28 J/kg
Mixed-layer CIN
-120 J/kg
Mixed-layer LCL
1031 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
196 m²/s²
0-3 km storm-relative helicity
180 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

383 
WUUS52 KRAH 101919
SVRRAH
NCC067-081-102000-
/O.NEW.KRAH.SV.W.0052.210510T1919Z-210510T2000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Raleigh NC
319 PM EDT Mon May 10 2021

The National Weather Service in Raleigh has issued a

* Severe Thunderstorm Warning for...
  East central Forsyth County in central North Carolina...
  Guilford County in central North Carolina...

* Until 400 PM EDT.

* At 318 PM EDT, a severe thunderstorm was located over Kernersville,
  or 12 miles east of Winston-Salem, moving southeast at 30 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, High Point, Kernersville, McLeansville, Summerfield,
  Stokesdale, Pleasant Garden, Jamestown, Lake Jeanette Marina and
  Monticello.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3606 8018 3626 8000 3623 7953 3591 7985
      3591 7989 3599 8005 3601 8005 3602 8009
TIME...MOT...LOC 1918Z 298DEG 26KT 3612 8005 

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

GIH
3 follow-up statements
652 
WWUS52 KRAH 101930
SVSRAH

Severe Weather Statement
National Weather Service Raleigh NC
330 PM EDT Mon May 10 2021

NCC067-101939-
/O.CAN.KRAH.SV.W.0052.000000T0000Z-210510T2000Z/
Forsyth NC-
330 PM EDT Mon May 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL FORSYTH 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 3612 8004 3625 7985 3623 7953 3591 7985
      3591 7989 3598 8003 3599 8004
TIME...MOT...LOC 1929Z 297DEG 25KT 3609 7997 

$$

NCC081-102000-
/O.CON.KRAH.SV.W.0052.000000T0000Z-210510T2000Z/
Guilford NC-
330 PM EDT Mon May 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR CENTRAL GUILFORD COUNTY...

At 329 PM EDT, a severe thunderstorm was located near Kernersville, 
or 8 miles west of Greensboro, moving southeast at 30 mph. Quarter 
size hail has been reported with this storm. 

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, High Point, McLeansville, Summerfield, Pleasant Garden,
Jamestown, Lake Jeanette Marina, Monticello, Oak Hollow Marina and
Lake Townsend Marina.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3612 8004 3625 7985 3623 7953 3591 7985
      3591 7989 3598 8003 3599 8004
TIME...MOT...LOC 1929Z 297DEG 25KT 3609 7997 

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

GIH
339 
WWUS52 KRAH 101942
SVSRAH

Severe Weather Statement
National Weather Service Raleigh NC
342 PM EDT Mon May 10 2021

NCC081-102000-
/O.CON.KRAH.SV.W.0052.000000T0000Z-210510T2000Z/
Guilford NC-
342 PM EDT Mon May 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR CENTRAL GUILFORD COUNTY...

At 342 PM EDT, a severe thunderstorm was located near Greensboro,
moving southeast at 30 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, High Point, McLeansville, Pleasant Garden, Jamestown,
Lake Townsend Marina, Lake Townsend, Lake Jeanette Marina, Monticello
and Lake Brandt.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3607 7999 3623 7977 3619 7957 3592 7984
      3593 7987 3599 7998 3601 8000
TIME...MOT...LOC 1942Z 298DEG 25KT 3605 7988 

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

GIH
404 
WWUS52 KRAH 101958
SVSRAH

Severe Weather Statement
National Weather Service Raleigh NC
358 PM EDT Mon May 10 2021

NCC081-102006-
/O.EXP.KRAH.SV.W.0052.000000T0000Z-210510T2000Z/
Guilford NC-
358 PM EDT Mon May 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL GUILFORD COUNTY WILL
EXPIRE AT 400 PM EDT...
        
The storm which prompted the warning is moving out of this warning 
area, however another severe thunderstorm warning has been issued 
for this storm farther southeast, over southeast Guilford, southwest 
Alamance, northwest Randolph, and far northeast Chatham counties. 

LAT...LON 3607 7999 3623 7977 3619 7957 3592 7984
      3593 7987 3599 7998 3601 8000
TIME...MOT...LOC 1956Z 298DEG 26KT 3601 7979 

$$

GIH

The office that day

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

IssuedProductOfficeCountiesLasted
May 10, 2:21 PM EDTSpecial Weather StatementRAHForsyth54 min
May 10, 2:57 PM EDTSpecial Weather StatementRAHForsyth, Guilford48 min
May 10, 3:26 PM EDTSpecial Weather StatementRAHDavidson49 min
May 10, 3:47 PM EDTSevere Thunderstorm WarningRAHAlamance, Chatham, Guilford, Randolph43 min
May 10, 4:02 PM EDTSevere Thunderstorm WarningRAHDavidson, Forsyth, Guilford, Randolph43 min
May 10, 4:11 PM EDTSpecial Weather StatementRAHDurham, Orange49 min
May 10, 4:32 PM EDTSpecial Weather StatementRAHAlamance, Chatham43 min
May 10, 4:37 PM EDTSevere Thunderstorm WarningRAHAlamance, Chatham, Durham, Lee, Orange38 min
May 10, 4:45 PM EDTTornado WarningRAHAlamance, Chatham, Orange30 min
May 10, 5:00 PM EDTSpecial Weather StatementRAHDurham60 min
May 10, 5:14 PM EDTSevere Thunderstorm WarningRAHChatham, Durham, Harnett, Orange, Wake46 min
May 10, 5:26 PM EDTSpecial Weather StatementRAHRandolph34 min
May 10, 5:47 PM EDTSpecial Weather StatementRAHChatham, Lee43 min
May 10, 5:57 PM EDTSpecial Weather StatementRAHJohnston, Wake48 min
May 10, 5:57 PM EDTSpecial Weather StatementRAHFranklin, Nash63 min
May 10, 6:14 PM EDTSevere Thunderstorm WarningRAHFranklin, Nash, Wake46 min
May 10, 6:36 PM EDTSpecial Weather StatementRAHHarnett39 min
May 10, 7:21 PM EDTSpecial Weather StatementRAHDavidson, Randolph54 min
May 10, 7:41 PM EDTSpecial Weather StatementRAHMontgomery64 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.