Alert archive / North Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 98, NWS Raleigh, NC

August 1, 2021Alamance County, Durham County, Orange County, North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at Aug 1, 2021, 7:10 AM EDT for Alamance County, Durham County, Orange County, North Carolina. It was in force for 50 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 1, 2021, 7:10 AM EDT (11:10 UTC)
Expired: Aug 1, 2021, 8:00 AM EDT
In force: 50 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Alamance County, NC, Durham County, NC, Orange County, NC

The radar

The Raleigh/Durham radar (KRAX), 66 km from the middle of the area, began a volume at 11:11 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.

What was reported inside it

Time	Report	Where	Remark
Aug 1, 7:19 AM EDT	TSTM WND DMG	1 Sw Haw River, NC	1 TREE REPORTED DOWN AT INTERSECTION OF RIVERBEND AND TOWN BRANCH ROAD.
Aug 1, 7:28 AM EDT	TSTM WND DMG	4 Ene Mebane, NC	1 TREE REPORTED DOWN AT THE INTERSECTION OF PINE MEADOW LANE AND FIELDSVIEW 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 00:00Z, 11.2 hours before the alert went out and 73 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: 36 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 1676 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 119 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

716 
WUUS52 KRAH 011110
SVRRAH
NCC001-063-135-011200-
/O.NEW.KRAH.SV.W.0098.210801T1110Z-210801T1200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Raleigh NC
710 AM EDT Sun Aug 1 2021

The National Weather Service in Raleigh has issued a

* Severe Thunderstorm Warning for...
  Central Alamance County in central North Carolina...
  Southern Orange County in central North Carolina...
  Southwestern Durham County in central North Carolina...

* Until 800 AM EDT.

* At 710 AM EDT, a severe thunderstorm was located near Burlington,
  moving east at 40 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Durham, Chapel Hill, Burlington, Graham, Hillsborough, Carrboro,
  Mebane, Elon, Gibsonville and Haw River.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3611 7882 3587 7885 3586 7896 3594 7954
      3612 7954
TIME...MOT...LOC 1110Z 274DEG 33KT 3603 7947 

HAIL...<.75IN
WIND...60MPH
 
$$

Green

1 follow-up statement

385 
WWUS52 KRAH 011125
SVSRAH

Severe Weather Statement
National Weather Service Raleigh NC
725 AM EDT Sun Aug 1 2021

NCC001-063-135-011200-
/O.CON.KRAH.SV.W.0098.000000T0000Z-210801T1200Z/
Alamance NC-Orange NC-Durham NC-
725 AM EDT Sun Aug 1 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 AM EDT
FOR CENTRAL ALAMANCE...SOUTHERN ORANGE AND SOUTHWESTERN DURHAM
COUNTIES...

At 725 AM EDT, a severe thunderstorm was located near Graham, moving
east at 40 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Durham, Chapel Hill, Burlington, Graham, Hillsborough, Carrboro,
Mebane, Haw River, Swepsonville and Efland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3611 7882 3587 7885 3586 7896 3593 7948
      3611 7946
TIME...MOT...LOC 1125Z 274DEG 33KT 3602 7932 

HAIL...<.75IN
WIND...60MPH
 
$$

Green

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 1, 5:33 AM EDT	Special Weather Statement	RAH	Guilford	57 min
Aug 1, 5:51 AM EDT	Severe Thunderstorm Warning	RAH	Davidson, Forsyth, Guilford, Randolph	39 min
Aug 1, 6:27 AM EDT	Special Weather Statement	RAH	Alamance, Guilford	63 min
Aug 1, 7:13 AM EDT	Special Weather Statement	RAH	Person	47 min
Aug 1, 8:00 AM EDT	Special Weather Statement	RAH	Granville	45 min
Aug 1, 8:05 AM EDT	Special Weather Statement	RAH	Vance	55 min
Aug 1, 12:56 PM EDT	Special Weather Statement	RAH	Edgecombe, Nash, Wilson	64 min
Aug 1, 1:08 PM EDT	Special Weather Statement	RAH	Forsyth	52 min
Aug 1, 1:12 PM EDT	Special Weather Statement	RAH	Johnston	48 min
Aug 1, 1:22 PM EDT	Severe Thunderstorm Warning	RAH	Edgecombe, Johnston, Nash, Wake, Wayne, Wilson	38 min
Aug 1, 1:31 PM EDT	Severe Thunderstorm Warning	RAH	Johnston, Sampson, Wayne	44 min
Aug 1, 2:00 PM EDT	Severe Thunderstorm Warning	RAH	Johnston, Wayne, Wilson	45 min
Aug 1, 2:07 PM EDT	Special Weather Statement	RAH	Chatham, Randolph	53 min
Aug 1, 2:15 PM EDT	Severe Thunderstorm Warning	RAH	Wayne	30 min
Aug 1, 2:42 PM EDT	Severe Thunderstorm Warning	RAH	Chatham, Randolph	48 min
Aug 1, 3:03 PM EDT	Special Weather Statement	RAH	Anson, Hoke, Richmond, Scotland	57 min
Aug 1, 3:18 PM EDT	Severe Thunderstorm Warning	RAH	Anson, Hoke, Richmond, Scotland	42 min
Aug 1, 3:51 PM EDT	Special Weather Statement	RAH	Sampson	54 min
Aug 1, 3:51 PM EDT	Special Weather Statement	RAH	Cumberland	54 min
Aug 1, 4:00 PM EDT	Tornado Warning	RAH	Cumberland	30 min
Aug 1, 4:28 PM EDT	Special Weather Statement	RAH	Johnston	62 min
Aug 1, 4:53 PM EDT	Special Weather Statement	RAH	Sampson	67 min
Aug 1, 5:09 PM EDT	Special Weather Statement	RAH	Sampson	36 min
Aug 1, 5:28 PM EDT	Special Weather Statement	RAH	Wayne	32 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.