Alert archive / North Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 82, NWS Raleigh, NC

July 11, 2021Johnston County, Wayne County, North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at Jul 11, 2021, 4:56 PM EDT for Johnston County, Wayne County, North Carolina. It was in force for 20 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: Jul 11, 2021, 4:56 PM EDT (20:56 UTC)
Expired: Jul 11, 2021, 5:16 PM EDT
In force: 20 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Johnston County, NC, Wayne County, NC

The radar

The Raleigh/Durham radar (KRAX), 41 km from the middle of the area, began a volume at 20:55 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

Newport, NC (KMHX), launched 12:00Z, 8.9 hours before the alert went out and 142 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: 779 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 910 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 58 m²/s²
0-3 km storm-relative helicity: 46 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

834 
WUUS52 KRAH 112056
SVRRAH
NCC101-191-112145-
/O.NEW.KRAH.SV.W.0082.210711T2056Z-210711T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Raleigh NC
456 PM EDT Sun Jul 11 2021

The National Weather Service in Raleigh has issued a

* Severe Thunderstorm Warning for...
  Southwestern Wayne County in central North Carolina...
  Southeastern Johnston County in central North Carolina...

* Until 545 PM EDT.

* At 455 PM EDT, a severe thunderstorm was located 10 miles southeast
  of Smithfield, moving east at 15 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Smithfield, Pine Level, Princeton and Grantham. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Straight line winds can blow down trees, power lines, and damage
mobile homes and other buildings. Seek shelter in a sturdy structure
until the storm has passed. Stay away from windows as flying debris
generated by damaging winds can be deadly.

&&

LAT...LON 3525 7827 3529 7830 3527 7837 3536 7835
      3551 7839 3552 7815 3524 7815
TIME...MOT...LOC 2055Z 271DEG 15KT 3538 7826 

HAIL...0.88IN
WIND...60MPH
 
$$

pwb

1 follow-up statement

906 
WWUS52 KRAH 112116
SVSRAH

Severe Weather Statement
National Weather Service Raleigh NC
516 PM EDT Sun Jul 11 2021

NCC101-191-112125-
/O.CAN.KRAH.SV.W.0082.000000T0000Z-210711T2145Z/
Wayne NC-Johnston NC-
516 PM EDT Sun Jul 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN WAYNE AND
SOUTHEASTERN 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.

LAT...LON 3525 7827 3529 7830 3527 7837 3536 7835
      3551 7839 3552 7815 3524 7815
TIME...MOT...LOC 2112Z 271DEG 15KT 3538 7815 

$$

pwb

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 12:56 PM EDT	Special Weather Statement	RAH	Vance, Warren	64 min
Jul 11, 2:08 PM EDT	Special Weather Statement	RAH	Edgecombe	52 min
Jul 11, 3:24 PM EDT	Special Weather Statement	RAH	Johnston	66 min
Jul 11, 4:11 PM EDT	Special Weather Statement	RAH	Person	64 min
Jul 11, 4:17 PM EDT	Special Weather Statement	RAH	Johnston	58 min
Jul 11, 4:38 PM EDT	Special Weather Statement	RAH	Johnston	67 min
Jul 11, 5:59 PM EDT	Special Weather Statement	RAH	Vance	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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.