Alert archive / North Carolina / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 84, NWS Raleigh, NC
NWS Raleigh, NC issued this severe thunderstorm warning at Jul 17, 2021, 5:21 PM EDT for Alamance County, Orange County, North Carolina. It was in force for 39 min. 1 report 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
- Jul 17, 2021, 5:21 PM EDT (21:21 UTC)
- Expired
- Jul 17, 2021, 6:00 PM EDT
- In force
- 39 min
- Issued by
- NWS Raleigh, NC
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Alamance County, NC, Orange County, NC
The radar
The Raleigh/Durham radar (KRAX), 94 km from the middle of the area, began a volume at 21:22 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 |
|---|---|---|---|
| Jul 17, 5:35 PM EDT | TSTM WND DMG | 2 Ne Haw River, NC | A TREE WAS REPORTED DOWN NEAR THE INTERSECTION OF BASON RD AND PINE LAKE LN. |
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, 9.4 hours before the alert went out and 50 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
- 966 J/kg
- Mixed-layer CIN
- -78 J/kg
- Mixed-layer LCL
- 843 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 19 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
588
WUUS52 KRAH 172121
SVRRAH
NCC001-135-172200-
/O.NEW.KRAH.SV.W.0084.210717T2121Z-210717T2200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Raleigh NC
521 PM EDT Sat Jul 17 2021
The National Weather Service in Raleigh has issued a
* Severe Thunderstorm Warning for...
Northern Alamance County in central North Carolina...
Northwestern Orange County in central North Carolina...
* Until 600 PM EDT.
* At 520 PM EDT, a severe thunderstorm was located near Camp Springs,
moving east at 35 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Burlington, Graham, Hillsborough, Mebane, Elon, Gibsonville, Haw
River, Swepsonville, Alamance and Carr.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.
&&
LAT...LON 3624 7918 3607 7911 3599 7954 3611 7954
3625 7953
TIME...MOT...LOC 2120Z 247DEG 29KT 3620 7951
HAIL...0.75IN
WIND...60MPH
$$
Kren3 follow-up statements
980
WWUS52 KRAH 172138
SVSRAH
Severe Weather Statement
National Weather Service Raleigh NC
538 PM EDT Sat Jul 17 2021
NCC001-135-172200-
/O.CON.KRAH.SV.W.0084.000000T0000Z-210717T2200Z/
Alamance NC-Orange NC-
538 PM EDT Sat Jul 17 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR NORTHERN ALAMANCE AND NORTHWESTERN ORANGE COUNTIES...
At 537 PM EDT, a severe thunderstorm was located over Jericho, moving
northeast at 35 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated. At 455 pm, law enforcement reported
several trees and power lines down in portions of Guilford
County.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Burlington, Graham, Hillsborough, Mebane, Haw River, Lake Cammack
Park & Marina, Carr, Altamahaw-Ossipee, Glen Raven and Union Ridge.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.
&&
LAT...LON 3624 7918 3607 7911 3606 7945 3612 7949
3625 7953
TIME...MOT...LOC 2137Z 247DEG 29KT 3625 7935
HAIL...0.75IN
WIND...60MPH
$$
Kren455
WWUS52 KRAH 172149
SVSRAH
Severe Weather Statement
National Weather Service Raleigh NC
549 PM EDT Sat Jul 17 2021
NCC001-135-172200-
/O.CON.KRAH.SV.W.0084.000000T0000Z-210717T2200Z/
Alamance NC-Orange NC-
549 PM EDT Sat Jul 17 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR NORTHEASTERN ALAMANCE AND NORTHWESTERN ORANGE COUNTIES...
At 548 PM EDT, a severe thunderstorm was located near Hightowers, or
near Prospect Hill, moving northeast at 35 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated. At 548 pm, law enforcement reported trees
down near the intersection of Friendship Patterson Mill Rd
and S NC Highway 62, as well as Bason Rd and Pine Lake Ln.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Hillsborough, Mebane, Carr and Union Ridge.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.
&&
LAT...LON 3624 7918 3607 7911 3611 7931 3614 7935
3625 7940
TIME...MOT...LOC 2148Z 247DEG 29KT 3629 7924
HAIL...0.75IN
WIND...60MPH
$$
Kren616
WWUS52 KRAH 172156
SVSRAH
Severe Weather Statement
National Weather Service Raleigh NC
556 PM EDT Sat Jul 17 2021
NCC001-135-172200-
/O.CON.KRAH.SV.W.0084.000000T0000Z-210717T2200Z/
Alamance NC-Orange NC-
556 PM EDT Sat Jul 17 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR NORTHEASTERN ALAMANCE AND NORTHWESTERN ORANGE COUNTIES...
At 554 PM EDT, a severe thunderstorm was located near Prospect Hill,
moving northeast at 35 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated. At 535 pm, a tree was reported down by law
enforcement near the intersection of Bason Rd and Pine Lake
Ln.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Hillsborough, Mebane and Carr.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.
&&
LAT...LON 3624 7918 3607 7911 3610 7926 3615 7930
3625 7932
TIME...MOT...LOC 2154Z 247DEG 29KT 3631 7918
HAIL...0.75IN
WIND...60MPH
$$
KrenThe office that day
Everything else NWS Raleigh, NC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 3:56 PM EDT | Special Weather Statement | RAH | Forsyth | 64 min |
| Jul 17, 4:24 PM EDT | Special Weather Statement | RAH | Randolph | 36 min |
| Jul 17, 4:35 PM EDT | Special Weather Statement | RAH | Johnston | 40 min |
| Jul 17, 4:41 PM EDT | Special Weather Statement | RAH | Guilford | 34 min |
| Jul 17, 4:43 PM EDT | Severe Thunderstorm Warning | RAH | Guilford | 47 min |
| Jul 17, 5:06 PM EDT | Areal Flood Advisory | RAH | Guilford | 3 hr |
| Jul 17, 5:32 PM EDT | Special Weather Statement | RAH | Davidson, Guilford | 58 min |
| Jul 17, 5:44 PM EDT | Severe Thunderstorm Warning | RAH | Durham, Orange, Person | 44 min |
| Jul 17, 6:32 PM EDT | Special Weather Statement | RAH | Guilford | 58 min |
| Jul 17, 6:40 PM EDT | Special Weather Statement | RAH | Wayne | 35 min |
| Jul 17, 6:57 PM EDT | Special Weather Statement | RAH | Sampson | 63 min |
| Jul 17, 7:33 PM EDT | Special Weather Statement | RAH | Guilford | 42 min |
| Jul 17, 7:42 PM EDT | Special Weather Statement | RAH | Wayne | 63 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.