Alert archive / North Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 128, NWS Raleigh, NC

September 8, 20214 counties in North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at Sep 8, 2021, 6:12 PM EDT for 4 counties in North Carolina. It was in force for 37 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Sep 8, 2021, 6:12 PM EDT (22:12 UTC)
Expired
Sep 8, 2021, 6:49 PM EDT
In force
37 min
Issued by
NWS Raleigh, NC
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Harnett County, NC, Johnston County, NC, Sampson County, NC, Wayne County, NC

The radar

The Raleigh/Durham radar (KRAX), 34 km from the middle of the area, began a volume at 22:11 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.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 10.2 hours before the alert went out and 148 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 2021-09-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1161 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 12:00Z on 2021-09-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 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
1161 J/kg
Mixed-layer CIN
-41 J/kg
Mixed-layer LCL
818 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
8 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

867 
WUUS52 KRAH 082212
SVRRAH
NCC085-101-163-191-082300-
/O.NEW.KRAH.SV.W.0128.210908T2212Z-210908T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Raleigh NC
612 PM EDT Wed Sep 8 2021

The National Weather Service in Raleigh has issued a

* Severe Thunderstorm Warning for...
  Northwestern Wayne County in central North Carolina...
  Northwestern Sampson County in central North Carolina...
  Eastern Harnett County in central North Carolina...
  Johnston County in central North Carolina...

* Until 700 PM EDT.

* At 612 PM EDT, a severe thunderstorm was located near Benson, or 17
  miles southwest of Smithfield, moving northeast 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...
  Smithfield, Clayton, Dunn, Benson, Micro, Selma, Erwin, Coats, Four
  Oaks and Pine Level.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.

&&

LAT...LON 3522 7863 3525 7862 3526 7869 3531 7878
      3551 7869 3568 7850 3566 7820 3541 7804
      3507 7839
TIME...MOT...LOC 2212Z 210DEG 25KT 3530 7850 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

GIH
1 follow-up statement
108 
WWUS52 KRAH 082249
SVSRAH

Severe Weather Statement
National Weather Service Raleigh NC
649 PM EDT Wed Sep 8 2021

NCC085-101-163-191-082258-
/O.CAN.KRAH.SV.W.0128.000000T0000Z-210908T2300Z/
Wayne NC-Sampson NC-Harnett NC-Johnston NC-
649 PM EDT Wed Sep 8 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN WAYNE...
NORTHWESTERN SAMPSON...EASTERN HARNETT AND JOHNSTON 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. However gusty winds to 
around 35 mph and deadly lightning are still possible with this 
thunderstorm.

LAT...LON 3522 7863 3525 7862 3526 7869 3531 7878
      3551 7869 3568 7850 3566 7820 3541 7804
      3507 7839
TIME...MOT...LOC 2245Z 210DEG 25KT 3552 7835 

$$

GIH

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 8, 8:26 AM EDTSpecial Weather StatementRAHDavidson, Stanly64 min
Sep 8, 9:27 AM EDTSpecial Weather StatementRAHForsyth, Guilford63 min
Sep 8, 2:51 PM EDTSpecial Weather StatementRAHStanly54 min
Sep 8, 3:11 PM EDTSpecial Weather StatementRAHWarren49 min
Sep 8, 3:56 PM EDTSpecial Weather StatementRAHMontgomery, Randolph49 min
Sep 8, 3:58 PM EDTSpecial Weather StatementRAHWarren47 min
Sep 8, 4:49 PM EDTSpecial Weather StatementRAHAlamance, Randolph56 min
Sep 8, 4:50 PM EDTSpecial Weather StatementRAHWarren40 min
Sep 8, 5:19 PM EDTSpecial Weather StatementRAHWarren56 min
Sep 8, 5:20 PM EDTSpecial Weather StatementRAHCumberland55 min
Sep 8, 5:29 PM EDTSpecial Weather StatementRAHHoke, Richmond, Scotland61 min
Sep 8, 5:34 PM EDTSevere Thunderstorm WarningRAHCumberland, Harnett, Sampson41 min
Sep 8, 5:50 PM EDTSevere Thunderstorm WarningRAHFranklin, Halifax, Warren40 min
Sep 8, 6:11 PM EDTAreal Flood AdvisoryRAHAnson, Richmond3 hr
Sep 8, 6:19 PM EDTSpecial Weather StatementRAHLee, Moore56 min
Sep 8, 6:27 PM EDTAreal Flood AdvisoryRAHFranklin, Warren3 hr
Sep 8, 6:28 PM EDTSpecial Weather StatementRAHVance62 min
Sep 8, 7:07 PM EDTSpecial Weather StatementRAHWarren38 min
Sep 8, 7:17 PM EDTSpecial Weather StatementRAHWake58 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.