Alert archive / North Carolina / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 44, NWS Wilmington, NC
NWS Wilmington, NC issued this severe thunderstorm warning at Aug 20, 2021, 10:30 PM EDT for Brunswick County, New Hanover County, North Carolina. It was in force for 30 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 20, 2021, 10:30 PM EDT (02:30 UTC)
- Expired
- Aug 20, 2021, 11:00 PM EDT
- In force
- 30 min
- Issued by
- NWS Wilmington, NC
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Brunswick County, NC, New Hanover County, NC
The radar
The Wilmington radar (KLTX), 60 km from the middle of the area, began a volume at 02:32 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 |
|---|---|---|---|
| Aug 20, 10:30 PM EDT | TSTM WND GST 59 | Wilmington Intl Arpt, NC | |
| Aug 20, 11:00 PM EDT | MARINE TSTM WIND 56 | 2 Sse Myrtle Grove, NC |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Newport, NC (KMHX), launched 00:00Z, 2.5 hours before the alert went out and 107 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.
- Mixed-layer CAPE
- 1105 J/kg
- Mixed-layer CIN
- -50 J/kg
- Mixed-layer LCL
- 643 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 85 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.5
The text
As transmitted.
042
WUUS52 KILM 210230
SVRILM
NCC019-129-210300-
/O.NEW.KILM.SV.W.0044.210821T0230Z-210821T0300Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Wilmington NC
1030 PM EDT Fri Aug 20 2021
The National Weather Service in Wilmington has issued a
* Severe Thunderstorm Warning for...
New Hanover County in southeastern North Carolina...
Northeastern Brunswick County in southeastern North Carolina...
* Until 1100 PM EDT.
* At 1030 PM EDT, a severe thunderstorm was located over Wilmington,
moving southeast at 20 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect wind damage to trees and power lines.
* Locations impacted include...
Wilmington, Leland, Carolina Beach, Wrightsville Beach, South
Masonboro Island, Snows Cut, Figure Eight Island, Hightsville, Cape
Fear Community College North Campus, Wilmington International
Airport, Myrtle Grove, Murrayville, Masonboro, Castle Hayne,
University Of North Carolina At Wilmington, Phoenix, Ogden,
Mayfaire, Wrightsboro and Silver Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3417 7783 3402 7790 3427 7810 3437 7794
3436 7794 3436 7793 3437 7793 3438 7792
3438 7790 3437 7790 3436 7789 3438 7786
3438 7785 3428 7773
TIME...MOT...LOC 0230Z 319DEG 16KT 3423 7789
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
VAO1 follow-up statement
986
WWUS52 KILM 210256
SVSILM
Severe Weather Statement
National Weather Service Wilmington NC
1056 PM EDT Fri Aug 20 2021
NCC019-129-210306-
/O.EXP.KILM.SV.W.0044.000000T0000Z-210821T0300Z/
New Hanover NC-Brunswick NC-
1056 PM EDT Fri Aug 20 2021
...THE SEVERE THUNDERSTORM WARNING FOR NEW HANOVER AND NORTHEASTERN
BRUNSWICK COUNTIES WILL EXPIRE AT 1100 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds are still possible with this thunderstorm. Frequent lightning
is still ongoing across the area.
LAT...LON 3417 7783 3402 7790 3427 7810 3437 7794
3436 7794 3436 7793 3437 7793 3438 7792
3438 7790 3437 7790 3436 7789 3438 7786
3438 7785 3428 7773
TIME...MOT...LOC 0256Z 319DEG 16KT 3414 7780
$$
VAOThe office that day
Everything else NWS Wilmington, NC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 8:19 PM EDT | Special Weather Statement | ILM | Bladen | 26 min |
| Aug 20, 8:55 PM EDT | Special Weather Statement | ILM | Bladen | 35 min |
| Aug 20, 9:40 PM EDT | Special Weather Statement | ILM | Pender | 50 min |
| Aug 20, 10:17 PM EDT | Special Weather Statement | ILM | New Hanover | 43 min |
| Aug 20, 10:49 PM EDT | Areal Flood Advisory | ILM | New Hanover, Pender | 86 min |
| Aug 20, 10:53 PM EDT | Special Marine Warning | ILM | 52 min | |
| Aug 21, 5:24 AM EDT | Coastal Flood Advisory | ILM | New Hanover | 18 hr |
| Aug 21, 5:26 PM EDT | Special Weather Statement | ILM | Columbus | 34 min |
| Aug 21, 5:31 PM EDT | Areal Flood Advisory | ILM | Brunswick, Columbus | 74 min |
| Aug 21, 5:57 PM EDT | Special Weather Statement | ILM | Pender | 33 min |
| Aug 21, 6:07 PM EDT | Severe Thunderstorm Warning | ILM | Brunswick, New Hanover, Pender | 38 min |
| Aug 21, 6:11 PM EDT | Special Weather Statement | ILM | Bladen | 34 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.