Alert archive / North Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 33, NWS Raleigh, NC

March 31, 2021Chatham County, Johnston County, Wake County, North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at Mar 31, 2021, 4:33 PM EDT for Chatham County, Johnston County, Wake County, North Carolina. It was in force for 42 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: Mar 31, 2021, 4:33 PM EDT (20:33 UTC)
Expired: Mar 31, 2021, 5:15 PM EDT
In force: 42 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Chatham County, NC, Johnston County, NC, Wake County, NC

The radar

The Raleigh/Durham radar (KRAX), 23 km from the middle of the area, began a volume at 20:34 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 nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 8.6 hours before the alert went out and 113 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: 10 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 552 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 157 m²/s²
0-3 km storm-relative helicity: 184 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

118 
WUUS52 KRAH 312033
SVRRAH
NCC037-101-183-312115-
/O.NEW.KRAH.SV.W.0033.210331T2033Z-210331T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Raleigh NC
433 PM EDT Wed Mar 31 2021

The National Weather Service in Raleigh has issued a

* Severe Thunderstorm Warning for...
  Wake County in central North Carolina...
  North central Johnston County in central North Carolina...
  East central Chatham County in central North Carolina...

* Until 515 PM EDT.

* At 431 PM EDT, a severe thunderstorm was located 7 miles east of
  Pittsboro, moving east at 45 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Raleigh, Cary, Garner, Apex, Holly Springs, Morrisville,
  Knightdale, Wendell, Rolesville and Crosswinds Boating Center.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3594 7840 3569 7832 3560 7906 3563 7912
      3577 7916 3595 7840
TIME...MOT...LOC 2031Z 257DEG 38KT 3570 7905 

HAIL...1.00IN
WIND...60MPH
 
$$

Green

2 follow-up statements

176 
WWUS52 KRAH 312048
SVSRAH

Severe Weather Statement
National Weather Service Raleigh NC
448 PM EDT Wed Mar 31 2021

NCC037-312057-
/O.CAN.KRAH.SV.W.0033.000000T0000Z-210331T2115Z/
Chatham NC-
448 PM EDT Wed Mar 31 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL CHATHAM COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3569 7832 3561 7899 3583 7892 3595 7840
TIME...MOT...LOC 2047Z 257DEG 38KT 3574 7884 

$$

NCC101-183-312115-
/O.CON.KRAH.SV.W.0033.000000T0000Z-210331T2115Z/
Wake NC-Johnston NC-
448 PM EDT Wed Mar 31 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR WAKE AND NORTH CENTRAL JOHNSTON COUNTIES...

At 447 PM EDT, a severe thunderstorm was located near Cary, moving
east at 45 mph.

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

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Raleigh, Cary, Garner, Apex, Holly Springs, Morrisville, Knightdale,
Wendell, Rolesville and Lake Wheeler.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3569 7832 3561 7899 3583 7892 3595 7840
TIME...MOT...LOC 2047Z 257DEG 38KT 3574 7884 

HAIL...1.00IN
WIND...60MPH
 
$$

Green

144 
WWUS52 KRAH 312101
SVSRAH

Severe Weather Statement
National Weather Service Raleigh NC
501 PM EDT Wed Mar 31 2021

NCC101-183-312115-
/O.CON.KRAH.SV.W.0033.000000T0000Z-210331T2115Z/
Wake NC-Johnston NC-
501 PM EDT Wed Mar 31 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR CENTRAL WAKE AND NORTH CENTRAL JOHNSTON COUNTIES...

At 501 PM EDT, a severe thunderstorm was located over Raleigh, moving
east at 45 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Raleigh, Cary, Garner, Knightdale, Wendell, Rolesville, Lake Wheeler,
William B Umstead State Park and Lake Benson.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3569 7832 3564 7875 3585 7881 3595 7840
TIME...MOT...LOC 2101Z 260DEG 39KT 3578 7865 

HAIL...1.25IN
WIND...60MPH
 
$$

Green

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 31, 2:34 PM EDT	Freeze Watch	RAH	Alamance, Anson, Chatham, Cumberland, Davidson, Durham and 25 more	13 hr
Mar 31, 3:10 PM EDT	Special Weather Statement	RAH	Franklin, Halifax, Nash, Warren	65 min
Mar 31, 3:19 PM EDT	Special Weather Statement	RAH	Alamance, Chatham, Durham, Granville, Orange, Person and 2 more	56 min
Mar 31, 4:16 PM EDT	Special Weather Statement	RAH	Franklin, Vance, Warren	59 min
Mar 31, 4:18 PM EDT	Special Weather Statement	RAH	Chatham, Harnett, Lee, Moore, Wake	57 min
Mar 31, 4:21 PM EDT	Special Weather Statement	RAH	Sampson	54 min
Mar 31, 4:27 PM EDT	Special Weather Statement	RAH	Cumberland	48 min
Mar 31, 4:53 PM EDT	Special Weather Statement	RAH	Halifax	67 min
Mar 31, 5:10 PM EDT	Severe Thunderstorm Warning	RAH	Franklin, Nash, Wake	50 min
Mar 31, 5:20 PM EDT	Special Weather Statement	RAH	Halifax	40 min
Mar 31, 5:38 PM EDT	Special Weather Statement	RAH	Sampson	52 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.