Alert archive / North Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 76, NWS Raleigh, NC

July 9, 20214 counties in North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at Jul 9, 2021, 4:45 PM EDT for 4 counties in North Carolina. It was in force for 45 min. 3 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: Jul 9, 2021, 4:45 PM EDT (20:45 UTC)
Expired: Jul 9, 2021, 5:30 PM EDT
In force: 45 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Chatham County, NC, Durham County, NC, Orange County, NC, Wake County, NC

The radar

The Raleigh/Durham radar (KRAX), 52 km from the middle of the area, began a volume at 20:47 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
Jul 9, 4:50 PM EDT	TSTM WND DMG	1 S Carrboro, NC	ONE TREE DOWN NEAR THE INTERSECTION OF LORILANE DR AND WESTBROOK DR IN CARRBORO. TIME ESTIMATED BY RADAR.
Jul 9, 4:50 PM EDT	TSTM WND DMG	4 Nw Parkwood, NC	THREE TREES DOWN NEAR THE INTERSECTION OF GARRETT RD AND KING CHARLES RD. TIME ESTIMATED BY RADAR.
Jul 9, 4:52 PM EDT	TSTM WND DMG	2 Sw Jordan Lake, NC	ONE TREE FELL ON A POWER LINE NEAR THE INTERSECTION OF SEAFORTH RD AND FOREST LANE. TIME ESTIMATED BY RADAR.

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, 8.8 hours before the alert went out and 84 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: 127 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 1287 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -22 m²/s²
0-3 km storm-relative helicity: 0 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

288 
WUUS52 KRAH 092045
SVRRAH
NCC037-063-135-183-092130-
/O.NEW.KRAH.SV.W.0076.210709T2045Z-210709T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Raleigh NC
445 PM EDT Fri Jul 9 2021

The National Weather Service in Raleigh has issued a

* Severe Thunderstorm Warning for...
  Orange County in central North Carolina...
  Western Wake County in central North Carolina...
  Eastern Chatham County in central North Carolina...
  Durham County in central North Carolina...

* Until 530 PM EDT.

* At 445 PM EDT, severe thunderstorms were located along a line
  extending from near Chapel Hill to near Pittsboro, moving east at
  25 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Raleigh, Durham, Cary, Chapel Hill, Hillsborough, Pittsboro,
  Carrboro, Fuquay-Varina, RDU International and Apex.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Straight line winds can blow down trees, power lines, and damage
mobile homes and other buildings. Seek shelter in a sturdy structure
until the storm has passed. Stay away from windows as flying debris
generated by damaging winds can be deadly.

&&

LAT...LON 3618 7880 3609 7881 3607 7878 3607 7868
      3553 7875 3558 7891 3552 7897 3555 7903
      3561 7908 3563 7912 3557 7920 3556 7920
      3555 7922 3557 7924 3553 7927 3556 7929
      3553 7933 3584 7926 3585 7924 3621 7925
TIME...MOT...LOC 2045Z 275DEG 23KT 3596 7907 3566 7912 

HAIL...0.75IN
WIND...60MPH
 
$$

CA

1 follow-up statement

949 
WWUS52 KRAH 092110
SVSRAH

Severe Weather Statement
National Weather Service Raleigh NC
510 PM EDT Fri Jul 9 2021

NCC037-063-135-183-092130-
/O.CON.KRAH.SV.W.0076.000000T0000Z-210709T2130Z/
Orange NC-Wake NC-Chatham NC-Durham NC-
510 PM EDT Fri Jul 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR CENTRAL ORANGE...WESTERN WAKE...EASTERN CHATHAM AND DURHAM
COUNTIES...

At 509 PM EDT, severe thunderstorms were located along a line
extending from Durham to 11 miles west of Fuquay-Varina, moving east
at 25 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Raleigh, Durham, Cary, Chapel Hill, Hillsborough, Pittsboro,
Carrboro, Fuquay-Varina, RDU International and Apex.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Straight line winds can blow down trees, power lines, and damage
mobile homes and other buildings. Seek shelter in a sturdy structure
until the storm has passed. Stay away from windows as flying debris
generated by damaging winds can be deadly.

&&

LAT...LON 3618 7880 3609 7881 3607 7878 3607 7868
      3553 7875 3558 7891 3552 7897 3555 7903
      3561 7908 3563 7912 3562 7914 3562 7916
      3586 7918 3620 7913
TIME...MOT...LOC 2109Z 270DEG 23KT 3595 7893 3565 7898 

HAIL...0.75IN
WIND...60MPH
 
$$

CA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 8, 10:07 PM EDT	River Flood Warning	RAH	Johnston	24 hr
Jul 8, 10:13 PM EDT	River Flood Warning	RAH	Johnston	51 hr
Jul 9, 1:45 PM EDT	Special Weather Statement	RAH	Forsyth	45 min
Jul 9, 1:51 PM EDT	Special Weather Statement	RAH	Granville, Person	54 min
Jul 9, 2:29 PM EDT	Special Weather Statement	RAH	Forsyth	61 min
Jul 9, 2:30 PM EDT	Special Weather Statement	RAH	Alamance, Durham, Orange	60 min
Jul 9, 3:04 PM EDT	Special Weather Statement	RAH	Franklin, Granville, Vance, Warren	56 min
Jul 9, 3:08 PM EDT	Special Weather Statement	RAH	Montgomery	67 min
Jul 9, 3:14 PM EDT	Special Weather Statement	RAH	Anson, Stanly	61 min
Jul 9, 3:43 PM EDT	Special Weather Statement	RAH	Wake	62 min
Jul 9, 4:14 PM EDT	Special Weather Statement	RAH	Edgecombe, Franklin, Halifax, Nash, Wilson	61 min
Jul 9, 4:15 PM EDT	Special Weather Statement	RAH	Edgecombe, Franklin, Halifax, Nash, Wilson	60 min
Jul 9, 4:25 PM EDT	Special Weather Statement	RAH	Chatham, Lee	65 min
Jul 9, 4:29 PM EDT	Areal Flood Advisory	RAH	Franklin, Wake	61 min
Jul 9, 4:30 PM EDT	Special Weather Statement	RAH	Anson, Montgomery, Richmond, Scotland	60 min
Jul 9, 5:18 PM EDT	Special Weather Statement	RAH	Wilson	57 min
Jul 9, 5:24 PM EDT	Severe Thunderstorm Warning	RAH	Durham, Harnett, Johnston, Wake	51 min
Jul 9, 5:38 PM EDT	Special Weather Statement	RAH	Hoke, Scotland	67 min
Jul 9, 5:50 PM EDT	Severe Thunderstorm Warning	RAH	Harnett, Johnston, Sampson, Wayne	55 min
Jul 9, 5:55 PM EDT	Special Weather Statement	RAH	Forsyth	65 min
Jul 9, 6:11 PM EDT	Special Weather Statement	RAH	Cumberland, Sampson	64 min
Jul 9, 6:19 PM EDT	Special Weather Statement	RAH	Wayne	56 min
Jul 9, 6:36 PM EDT	Severe Thunderstorm Warning	RAH	Johnston, Sampson, Wayne	39 min
Jul 9, 6:58 PM EDT	Special Weather Statement	RAH	Davidson	62 min
Jul 9, 7:07 PM EDT	Severe Thunderstorm Warning	RAH	Sampson	38 min
Jul 9, 7:11 PM EDT	Severe Thunderstorm Warning	RAH	Sampson, Wayne	49 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.