Alert archive / North Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 132, NWS Raleigh, NC

October 25, 20216 counties in North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at Oct 25, 2021, 8:37 PM EDT for 6 counties in North Carolina. It was in force for 38 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: Oct 25, 2021, 8:37 PM EDT (00:37 UTC)
Expired: Oct 25, 2021, 9:15 PM EDT
In force: 38 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Alamance County, NC, Chatham County, NC, Durham County, NC, Granville County, NC, Orange County, NC, Person County, NC

The radar

The Raleigh/Durham radar (KRAX), 49 km from the middle of the area, began a volume at 00:36 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
Oct 25, 8:55 PM EDT	TSTM WND DMG	4 Ene Bahama, NC	ONE TREE WAS REPORTED DOWN NEAR THE INTERSECTION OF RANGE RD AND HAMPTON RD. TIME ESTIMATED BY RADAR.
Oct 25, 8:56 PM EDT	TSTM WND DMG	4 Nnw Butner, NC	POWER LINE REPORTED DOWN NEAR THE INTERSECTION OF RANGE RD AND CASSAM RD. TIME ESTIMATED BY RADAR.
Oct 25, 8:58 PM EDT	TSTM WND DMG	1 Nne Durham, NC	PUBLIC REPORTS LARGE TREE LIMBS DOWN IN DOWNTOWN DURHAM.
Oct 25, 9:12 PM EDT	TSTM WND DMG	3 Ese Bethesda, NC	ONE TREE REPORTED DOWN NEAR THE INTERSECTION OF LEESVILLE RD AND DOC NICHOLS RD. TIME ESTIMATED BY RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Oct 25, 6:26 PM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 0.6 hours before the alert went out and 97 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: 104 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 939 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 245 m²/s²
0-3 km storm-relative helicity: 349 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted.

909 
WUUS52 KRAH 260037
SVRRAH
NCC001-037-063-077-135-145-260115-
/O.NEW.KRAH.SV.W.0132.211026T0037Z-211026T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Raleigh NC
837 PM EDT Mon Oct 25 2021

The National Weather Service in Raleigh has issued a

* Severe Thunderstorm Warning for...
  Southeastern Alamance County in central North Carolina...
  Southeastern Person County in central North Carolina...
  Orange County in central North Carolina...
  Southwestern Granville County in central North Carolina...
  Northeastern Chatham County in central North Carolina...
  Durham County in central North Carolina...

* Until 915 PM EDT.

* At 836 PM EDT, severe thunderstorms were located along a line
  extending from Rougemont to Hillsborough to 11 miles south of
  Graham, moving southeast at 25 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Durham, Chapel Hill, Oxford, Hillsborough, Creedmoor, Carrboro,
  Butner, Rougemont, Stem and Lake Michie.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3632 7857 3607 7873 3607 7875 3603 7875
      3601 7870 3595 7873 3592 7876 3593 7880
      3587 7883 3587 7891 3584 7891 3577 7898
      3590 7937 3633 7895
TIME...MOT...LOC 0036Z 299DEG 22KT 3622 7893 3606 7912 3591 7933 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Kren

2 follow-up statements

191 
WWUS52 KRAH 260052
SVSRAH

Severe Weather Statement
National Weather Service Raleigh NC
852 PM EDT Mon Oct 25 2021

NCC001-260102-
/O.CAN.KRAH.SV.W.0132.000000T0000Z-211026T0115Z/
Alamance NC-
852 PM EDT Mon Oct 25 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ALAMANCE COUNTY
IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 100 AM EDT for
central North Carolina.

LAT...LON 3632 7857 3607 7873 3607 7875 3603 7875
      3601 7870 3595 7873 3592 7876 3593 7880
      3587 7883 3587 7891 3584 7891 3577 7898
      3586 7925 3633 7889
TIME...MOT...LOC 0052Z 296DEG 24KT 3617 7877 3601 7897 3593 7915 

$$

NCC037-063-077-135-145-260115-
/O.CON.KRAH.SV.W.0132.000000T0000Z-211026T0115Z/
Person NC-Orange NC-Granville NC-Chatham NC-Durham NC-
852 PM EDT Mon Oct 25 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM EDT
FOR SOUTHEASTERN PERSON...EASTERN ORANGE...SOUTHWESTERN GRANVILLE...
NORTHEASTERN CHATHAM AND DURHAM COUNTIES...

At 852 PM EDT, severe thunderstorms were located along a line
extending from near Butner to near Durham to near Carrboro, moving
southeast at 25 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Durham, Chapel Hill, Oxford, Hillsborough, Creedmoor, Carrboro,
Butner, Rougemont, Stem and Lake Michie.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3632 7857 3607 7873 3607 7875 3603 7875
      3601 7870 3595 7873 3592 7876 3593 7880
      3587 7883 3587 7891 3584 7891 3577 7898
      3586 7925 3633 7889
TIME...MOT...LOC 0052Z 296DEG 24KT 3617 7877 3601 7897 3593 7915 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Kren

530 
WWUS52 KRAH 260103
SVSRAH

Severe Weather Statement
National Weather Service Raleigh NC
903 PM EDT Mon Oct 25 2021

NCC145-260112-
/O.CAN.KRAH.SV.W.0132.000000T0000Z-211026T0115Z/
Person NC-
903 PM EDT Mon Oct 25 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN PERSON COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 100 AM EDT for
central North Carolina.

LAT...LON 3632 7857 3608 7873 3607 7875 3603 7875
      3601 7870 3595 7873 3592 7876 3593 7880
      3587 7883 3587 7891 3584 7891 3577 7898
      3583 7917 3624 7882 3624 7880 3626 7880
      3632 7875
TIME...MOT...LOC 0102Z 269DEG 22KT 3615 7870 3598 7889 3591 7908 

$$

NCC037-063-077-135-260115-
/O.CON.KRAH.SV.W.0132.000000T0000Z-211026T0115Z/
Orange NC-Granville NC-Chatham NC-Durham NC-
903 PM EDT Mon Oct 25 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM EDT
FOR SOUTHEASTERN ORANGE...SOUTHWESTERN GRANVILLE...NORTHEASTERN
CHATHAM AND DURHAM COUNTIES...

At 902 PM EDT, severe thunderstorms were located along a line
extending from Creedmoor to Durham to Carrboro, moving east at 25
mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Durham, Chapel Hill, Oxford, Creedmoor, Carrboro, Butner, Stem, Lake
Michie, Gorman and Parkwood.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3632 7857 3608 7873 3607 7875 3603 7875
      3601 7870 3595 7873 3592 7876 3593 7880
      3587 7883 3587 7891 3584 7891 3577 7898
      3583 7917 3624 7882 3624 7880 3626 7880
      3632 7875
TIME...MOT...LOC 0102Z 269DEG 22KT 3615 7870 3598 7889 3591 7908 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Kren

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 25, 8:12 PM EDT	Special Weather Statement	RAH	Alamance, Orange, Person	63 min
Oct 25, 9:01 PM EDT	Special Weather Statement	RAH	Franklin, Granville, Vance	29 min
Oct 25, 9:07 PM EDT	Severe Thunderstorm Warning	RAH	Franklin, Granville, Vance, Wake, Warren	38 min
Oct 25, 9:14 PM EDT	Special Weather Statement	RAH	Wake	46 min
Oct 25, 9:36 PM EDT	Special Weather Statement	RAH	Franklin, Nash	39 min
Oct 25, 9:46 PM EDT	Special Weather Statement	RAH	Wake	44 min
Oct 25, 9:50 PM EDT	Special Weather Statement	RAH	Halifax, Warren	40 min
Oct 25, 10:19 PM EDT	Areal Flood Advisory	RAH	Chatham, Durham, Franklin, Granville, Wake	2 hr
Oct 25, 10:22 PM EDT	Special Weather Statement	RAH	Edgecombe, Halifax, Harnett, Johnston, Lee, Nash and 3 more	83 min
Oct 25, 11:45 PM EDT	Special Weather Statement	RAH	Wayne	45 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.