Alert archive / North Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 88, NWS Raleigh, NC

July 17, 2021Granville County, Person County, North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at Jul 17, 2021, 9:59 PM EDT for Granville County, Person County, North Carolina. It was in force for 46 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: Jul 17, 2021, 9:59 PM EDT (01:59 UTC)
Expired: Jul 17, 2021, 10:45 PM EDT
In force: 46 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Granville County, NC, Person County, NC

The radar

The Raleigh/Durham radar (KRAX), 89 km from the middle of the area, began a volume at 02:03 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, 10:13 PM EDT	TSTM WND DMG	3 E Bushy Fork, NC	ROXBORO FIRE DEPARTMENT REPORTS TREES FELL ON POWER LINES AND A CAR OUTSIDE THE CITY OF HURDLE MILLS. THE INTERSECTION WAS NEAR CLAY LONG RD AND HURDLE MILLS RD. TIME ESTIMATED BY RADAR.
Jul 17, 10:13 PM EDT	TSTM WND DMG	5 Nnw Rougemont, NC	LAW ENFORCEMENT CONFIRMS MULTIPLE TREES REPORTED DOWN NEAR THE INTERSECTION OF DICK HOLEMAN RD AND DURHAM RD.

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

The nearest sounding before it

Roanoke, VA (KRNK), launched 00:00Z, 2.0 hours before the alert went out and 107 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: 239 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 1265 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 21 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

669 
WUUS52 KRAH 180159
SVRRAH
NCC077-145-180245-
/O.NEW.KRAH.SV.W.0088.210718T0159Z-210718T0245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Raleigh NC
959 PM EDT Sat Jul 17 2021

The National Weather Service in Raleigh has issued a

* Severe Thunderstorm Warning for...
  Person County in central North Carolina...
  Northern Granville County in central North Carolina...

* Until 1045 PM EDT.

* At 958 PM EDT, a severe thunderstorm was located over Leasburg, or
  9 miles west of Roxboro, moving east at 35 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Oxford, Roxboro, Concord, Stovall, Bethel Hill, Bushy Fork, Hyco
  Lake, Mayo Reservoir, Hyco Marina and Berea.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3646 7851 3626 7851 3625 7915 3653 7914
      3654 7908 3654 7849
TIME...MOT...LOC 0158Z 256DEG 30KT 3644 7916 

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

7

3 follow-up statements

308 
WWUS52 KRAH 180220
SVSRAH

Severe Weather Statement
National Weather Service Raleigh NC
1020 PM EDT Sat Jul 17 2021

NCC077-145-180245-
/O.CON.KRAH.SV.W.0088.000000T0000Z-210718T0245Z/
Person NC-Granville NC-
1020 PM EDT Sat Jul 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM EDT
FOR PERSON AND NORTHERN GRANVILLE COUNTIES...

At 1019 PM EDT, severe thunderstorms were located along a line
extending from near Cluster Springs to 8 miles east of Roxboro to 6
miles north of Rougemont, moving east at 45 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Oxford, Roxboro, Concord, Stovall, Bethel Hill, Mayo Reservoir,
Berea, Surl, Moriah and Hyco Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Continuous cloud to ground lightning is occurring with these storms.
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 3646 7851 3626 7851 3625 7885 3628 7899
      3653 7914 3654 7908 3654 7849
TIME...MOT...LOC 0219Z 267DEG 38KT 3657 7890 3643 7884 3631 7889 

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

7

977 
WWUS52 KRAH 180237
SVSRAH

Severe Weather Statement
National Weather Service Raleigh NC
1037 PM EDT Sat Jul 17 2021

NCC145-180246-
/O.CAN.KRAH.SV.W.0088.000000T0000Z-210718T0245Z/
Person NC-
1037 PM EDT Sat Jul 17 2021

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

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

LAT...LON 3646 7851 3632 7851 3626 7880 3654 7880
      3654 7849
TIME...MOT...LOC 0236Z 256DEG 29KT 3660 7875 3646 7869 3634 7874 

$$

NCC077-180245-
/O.CON.KRAH.SV.W.0088.000000T0000Z-210718T0245Z/
Granville NC-
1037 PM EDT Sat Jul 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM EDT
FOR NORTHERN GRANVILLE COUNTY...

At 1036 PM EDT, severe thunderstorms were located along a line
extending from Hitesburg to 8 miles southeast of Virgilina to 8 miles
west of Oxford, moving east at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Oxford, Stovall, Berea and John H Kerr Reservoir. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Damaging winds and 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 3646 7851 3632 7851 3626 7880 3654 7880
      3654 7849
TIME...MOT...LOC 0236Z 256DEG 29KT 3660 7875 3646 7869 3634 7874 

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

7

218 
WWUS52 KRAH 180244
SVSRAH

Severe Weather Statement
National Weather Service Raleigh NC
1044 PM EDT Sat Jul 17 2021

NCC077-180254-
/O.EXP.KRAH.SV.W.0088.000000T0000Z-210718T0245Z/
Granville NC-
1044 PM EDT Sat Jul 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN GRANVILLE COUNTY WILL
EXPIRE AT 1045 PM EDT...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with these thunderstorms.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Raleigh.

LAT...LON 3646 7851 3632 7851 3626 7880 3654 7880
      3654 7849
TIME...MOT...LOC 0244Z 256DEG 30KT 3661 7870 3647 7864 3635 7869 

$$

7

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 8:01 PM EDT	Special Weather Statement	RAH	Forsyth	29 min
Jul 17, 8:10 PM EDT	Severe Thunderstorm Warning	RAH	Davidson, Forsyth	50 min
Jul 17, 8:49 PM EDT	Severe Thunderstorm Warning	RAH	Forsyth, Guilford	23 min
Jul 17, 9:04 PM EDT	Areal Flood Advisory	RAH	Forsyth, Guilford	46 min
Jul 17, 9:15 PM EDT	Special Weather Statement	RAH	Davidson	30 min
Jul 17, 9:26 PM EDT	Areal Flood Advisory	RAH	Davidson, Forsyth, Guilford	77 min
Jul 17, 9:40 PM EDT	Special Weather Statement	RAH	Guilford	35 min
Jul 17, 9:55 PM EDT	Special Weather Statement	RAH	Person	65 min
Jul 17, 10:48 PM EDT	Special Weather Statement	RAH	Granville, Vance, Warren	42 min
Jul 18, 5:46 PM EDT	Special Weather Statement	RAH	Cumberland, Hoke, Sampson, Wayne	59 min
Jul 18, 5:54 PM EDT	Special Weather Statement	RAH	Forsyth, Guilford	66 min
Jul 18, 5:58 PM EDT	Special Weather Statement	RAH	Vance, Warren	62 min
Jul 18, 6:29 PM EDT	Special Weather Statement	RAH	Vance, Warren	61 min
Jul 18, 6:31 PM EDT	Special Weather Statement	RAH	Cumberland, Harnett, Hoke, Johnston, Lee, Montgomery and 4 more	59 min
Jul 18, 6:35 PM EDT	Special Weather Statement	RAH	Durham	40 min
Jul 18, 6:51 PM EDT	Severe Thunderstorm Warning	RAH	Granville, Vance, Warren	39 min
Jul 18, 7:35 PM EDT	Special Weather Statement	RAH	Chatham, Davidson, Lee, Moore, Randolph	55 min
Jul 18, 7:51 PM EDT	Special Weather Statement	RAH	Halifax	54 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.