Alert archive / North Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 91, NWS Raleigh, NC

July 28, 20214 counties in North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at Jul 28, 2021, 3:36 PM EDT for 4 counties in North Carolina. It was in force for 39 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 28, 2021, 3:36 PM EDT (19:36 UTC)
Expired: Jul 28, 2021, 4:15 PM EDT
In force: 39 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Chatham County, NC, Harnett County, NC, Lee County, NC, Wake County, NC

The radar

The Raleigh/Durham radar (KRAX), 38 km from the middle of the area, began a volume at 19:40 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jul 28, 2:19 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 7.6 hours before the alert went out and 106 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: 1406 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 998 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: 16 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted.

887 
WUUS52 KRAH 281936
SVRRAH
NCC037-085-105-183-282015-
/O.NEW.KRAH.SV.W.0091.210728T1936Z-210728T2015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Raleigh NC
336 PM EDT Wed Jul 28 2021

The National Weather Service in Raleigh has issued a

* Severe Thunderstorm Warning for...
  North central Harnett County in central North Carolina...
  Northeastern Lee County in central North Carolina...
  Southwestern Wake County in central North Carolina...
  Southeastern Chatham County in central North Carolina...

* Until 415 PM EDT.

* At 336 PM EDT, a severe thunderstorm was located near
  Fuquay-Varina, or 13 miles southwest of Cary, moving south at 20
  mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Cary, Lillington, Fuquay-Varina, Angier, Apex, Holly Springs,
  Broadway, New Hill, Raven Rock State Park and Harris Lake Boat
  Launch.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3576 7895 3573 7880 3567 7869 3534 7879
      3539 7897 3548 7912
TIME...MOT...LOC 1936Z 012DEG 17KT 3560 7891 

HAIL...0.88IN
WIND...60MPH
 
$$

Kren

1 follow-up statement

916 
WWUS52 KRAH 282013
SVSRAH

Severe Weather Statement
National Weather Service Raleigh NC
413 PM EDT Wed Jul 28 2021

NCC037-085-105-183-282023-
/O.EXP.KRAH.SV.W.0091.000000T0000Z-210728T2015Z/
Harnett NC-Lee NC-Wake NC-Chatham NC-
413 PM EDT Wed Jul 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL HARNETT...
NORTHEASTERN LEE...SOUTHWESTERN WAKE AND SOUTHEASTERN CHATHAM
COUNTIES WILL EXPIRE AT 415 PM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However heavy rain
is still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
central North Carolina.

LAT...LON 3576 7895 3573 7880 3567 7869 3534 7879
      3539 7897 3548 7912
TIME...MOT...LOC 2013Z 012DEG 17KT 3544 7895 

$$

Kren

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 2:32 PM EDT	Special Weather Statement	RAH	Harnett	28 min
Jul 28, 3:02 PM EDT	Severe Thunderstorm Warning	RAH	Harnett	43 min
Jul 28, 4:42 PM EDT	Severe Thunderstorm Warning	RAH	Johnston, Nash, Wake, Wayne, Wilson	63 min
Jul 28, 5:06 PM EDT	Special Weather Statement	RAH	Scotland	54 min
Jul 28, 5:43 PM EDT	Severe Thunderstorm Warning	RAH	Edgecombe, Wilson	47 min
Jul 28, 5:45 PM EDT	Severe Thunderstorm Warning	RAH	Cumberland, Hoke, Sampson	45 min
Jul 28, 6:27 PM EDT	Severe Thunderstorm Warning	RAH	Cumberland, Sampson	27 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.