Alert archive / North Carolina / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 53, NWS Raleigh, NC
NWS Raleigh, NC issued this severe thunderstorm warning at May 10, 2021, 3:47 PM EDT for 4 counties in North Carolina. It was in force for 43 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, 3:47 PM EDT (19:47 UTC)
- Expired
- May 10, 2021, 4:30 PM EDT
- In force
- 43 min
- Issued by
- NWS Raleigh, NC
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Alamance County, NC, Chatham County, NC, Guilford County, NC, Randolph County, NC
The radar
The Raleigh/Durham radar (KRAX), 116 km from the middle of the area, began a volume at 19:47 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 |
|---|---|---|---|
| May 10, 3:47 PM EDT | HAIL 1 | 2 Sw Greensboro, NC | PUBLIC REPORTED QUARTER SIZE HAIL IN WEST GREENSBORO. REPORTED VIA MPING. |
| May 10, 3:50 PM EDT | TSTM WND GST 52 | 4 Wsw Greensboro, NC | MEASURED AT GUILFORD COUNTY EM WEATHERSTEM SITE. |
| May 10, 4:40 PM EDT | TSTM WND DMG | 3 Sw Swepsonville, NC | A TREE WAS REPORTED DOWN ON A HOUSE NEAR MOUNT HERMAN ROCK CREEK ROAD AND HERBERT DRIVE. |
| May 10, 4:40 PM EDT | TSTM WND DMG | 5 Sw Swepsonville, NC | POWER POLES AND TREES BRANCHES WERE REPORTED DOWN ALONG KEYSTONE ROAD BETWEEN MOUNT HERMON ROCK CREEK ROAD AND BASS MOUNTAIN 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 12:00Z, 7.8 hours before the alert went out and 20 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
- 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
The text
As transmitted.
423
WUUS52 KRAH 101947
SVRRAH
NCC001-037-081-151-102030-
/O.NEW.KRAH.SV.W.0053.210510T1947Z-210510T2030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Raleigh NC
347 PM EDT Mon May 10 2021
The National Weather Service in Raleigh has issued a
* Severe Thunderstorm Warning for...
Southwestern Alamance County in central North Carolina...
Northeastern Randolph County in central North Carolina...
Southeastern Guilford County in central North Carolina...
Northwestern Chatham County in central North Carolina...
* Until 430 PM EDT.
* At 347 PM EDT, a severe thunderstorm was located over Greensboro,
moving southeast at 35 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, Burlington, Graham, McLeansville,
Gibsonville, Pleasant Garden, Jamestown, Liberty and Swepsonville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Large hail, 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.
&&
LAT...LON 3599 7998 3618 7976 3602 7934 3572 7954
TIME...MOT...LOC 1947Z 292DEG 29KT 3604 7985
HAIL...1.00IN
WIND...60MPH
$$
GIH2 follow-up statements
503
WWUS52 KRAH 102003
SVSRAH
Severe Weather Statement
National Weather Service Raleigh NC
403 PM EDT Mon May 10 2021
NCC001-037-081-151-102030-
/O.CON.KRAH.SV.W.0053.000000T0000Z-210510T2030Z/
Alamance NC-Randolph NC-Guilford NC-Chatham NC-
403 PM EDT Mon May 10 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR SOUTHWESTERN ALAMANCE...NORTHEASTERN RANDOLPH...SOUTHEASTERN
GUILFORD AND NORTHWESTERN CHATHAM COUNTIES...
At 403 PM EDT, a severe thunderstorm was located 8 miles southwest of
McLeansville, or 8 miles southeast of Greensboro, moving east at 30
mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Burlington, Graham, McLeansville, Gibsonville, Pleasant Garden,
Liberty, Swepsonville, Alamance, Staley and Lake Guilford Mackintosh
Marina.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 3594 7986 3614 7965 3602 7934 3572 7954
TIME...MOT...LOC 2003Z 291DEG 28KT 3600 7972
HAIL...1.00IN
WIND...60MPH
$$
GIH289
WWUS52 KRAH 102029
SVSRAH
Severe Weather Statement
National Weather Service Raleigh NC
429 PM EDT Mon May 10 2021
NCC001-037-081-151-102038-
/O.EXP.KRAH.SV.W.0053.000000T0000Z-210510T2030Z/
Alamance NC-Randolph NC-Guilford NC-Chatham NC-
429 PM EDT Mon May 10 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN ALAMANCE...
NORTHEASTERN RANDOLPH...SOUTHEASTERN GUILFORD AND NORTHWESTERN
CHATHAM COUNTIES WILL EXPIRE AT 430 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, small
hail and gusty winds are still possible with this thunderstorm, and
it will be closely watched for signs of restrengthening.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
central North Carolina.
LAT...LON 3594 7986 3614 7965 3602 7934 3572 7954
TIME...MOT...LOC 2028Z 292DEG 29KT 3593 7951
$$
GIHThe office that day
Everything else NWS Raleigh, NC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 10, 2:21 PM EDT | Special Weather Statement | RAH | Forsyth | 54 min |
| May 10, 2:57 PM EDT | Special Weather Statement | RAH | Forsyth, Guilford | 48 min |
| May 10, 3:19 PM EDT | Severe Thunderstorm Warning | RAH | Forsyth, Guilford | 41 min |
| May 10, 3:26 PM EDT | Special Weather Statement | RAH | Davidson | 49 min |
| May 10, 4:02 PM EDT | Severe Thunderstorm Warning | RAH | Davidson, Forsyth, Guilford, Randolph | 43 min |
| May 10, 4:11 PM EDT | Special Weather Statement | RAH | Durham, Orange | 49 min |
| May 10, 4:32 PM EDT | Special Weather Statement | RAH | Alamance, Chatham | 43 min |
| May 10, 4:37 PM EDT | Severe Thunderstorm Warning | RAH | Alamance, Chatham, Durham, Lee, Orange | 38 min |
| May 10, 4:45 PM EDT | Tornado Warning | RAH | Alamance, Chatham, Orange | 30 min |
| May 10, 5:00 PM EDT | Special Weather Statement | RAH | Durham | 60 min |
| May 10, 5:14 PM EDT | Severe Thunderstorm Warning | RAH | Chatham, Durham, Harnett, Orange, Wake | 46 min |
| May 10, 5:26 PM EDT | Special Weather Statement | RAH | Randolph | 34 min |
| May 10, 5:47 PM EDT | Special Weather Statement | RAH | Chatham, Lee | 43 min |
| May 10, 5:57 PM EDT | Special Weather Statement | RAH | Johnston, Wake | 48 min |
| May 10, 5:57 PM EDT | Special Weather Statement | RAH | Franklin, Nash | 63 min |
| May 10, 6:14 PM EDT | Severe Thunderstorm Warning | RAH | Franklin, Nash, Wake | 46 min |
| May 10, 6:36 PM EDT | Special Weather Statement | RAH | Harnett | 39 min |
| May 10, 7:21 PM EDT | Special Weather Statement | RAH | Davidson, Randolph | 54 min |
| May 10, 7:41 PM EDT | Special Weather Statement | RAH | Montgomery | 64 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.