Alert archive / North Carolina / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 56, NWS Raleigh, NC

May 11, 2019Davidson County, Randolph County, North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at May 11, 2019, 3:42 PM EDT for Davidson County, Randolph County, North Carolina. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 11, 2019, 3:42 PM EDT (19:42 UTC)
Expired: May 11, 2019, 4:30 PM EDT
In force: 48 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Davidson County, NC, Randolph County, NC

The radar

The Raleigh/Durham radar (KRAX), 138 km from the middle of the area, began a volume at 19:42 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, 7.7 hours before the alert went out and 38 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: 401 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 702 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 18 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Raleigh, NC wrote its last area forecast discussion before this severe thunderstorm warning went out at May 11, 3:40 PM EDT, 2 minutes earlier.

Area forecast discussion, May 11, 3:40 PM EDT, 2 minutes before

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Hazardous weather outlook, May 11, 5:10 AM EDT, 10 hours 32 minutes before

Hazardous Weather Outlook
National Weather Service Raleigh NC
510 AM EDT Sat May 11 2019

NCZ007>011-021>028-038>043-073>078-083>086-088-089-120915-
Person-Granville-Vance-Warren-Halifax-Forsyth-Guilford-Alamance-
Orange-Durham-Franklin-Nash-Edgecombe-Davidson-Randolph-Chatham-Wake-
Johnston-Wilson-Stanly-Montgomery-Moore-Lee-Harnett-Wayne-Anson-
Richmond-Scotland-Hoke-Cumberland-Sampson-
510 AM EDT Sat May 11 2019

This Hazardous Weather Outlook is for central North Carolina.

.DAY ONE...Today and tonight.

There is a low probability for widespread hazardous weather.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Periods of heavy rain could lead to localized flash flooding
particularly in urban areas through the weekend and into Monday. In
addition, some strong to severe thunderstorms will be possible on
Sunday afternoon.

.SPOTTER INFORMATION STATEMENT...

Spotter activation for severe weather may be needed on Sunday.

In the hours before

Special weather statement, May 11, 3:18 PM EDT, 24 minutes before

Special Weather Statement
National Weather Service Raleigh NC
318 PM EDT SAT MAY 11 2019

NCZ038-039-112015-
Randolph NC-Davidson NC-
318 PM EDT SAT MAY 11 2019

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN DAVIDSON AND
RANDOLPH COUNTIES UNTIL 415 PM EDT...

At 317 PM EDT, Doppler radar was tracking a strong thunderstorm near
High Rock Lake, or 12 miles south of Lexington, moving east at 35
mph.

Wind gusts up to 40 mph will be possible with this storm.

Heavy rain and minor flooding will also be possible with this storm.

Locations impacted include...
Asheboro, Lexington, Randleman, North Carolina Zoo, Seagrove,
Linwood, Denton, Gordontown, Randleman Regional Reservior Marina and
High Rock Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Seek shelter in a nearby building or vehicle. Wind gusts as high as
40 mph are capable of knocking down tree limbs and blowing around
light outdoor objects.

Locally heavy rain will quickly reduce visibility and result in
ponding of water on roadways, standing water in low lying areas, and
minor flooding of creeks, streams, and areas of poor drainage.
Drivers are urged to slow down and use extra caution to avoid
hydroplaning, especially in urban areas where prolonged heavy rain
can quickly lead to flooding.

&&

LAT...LON 3577 8035 3591 7974 3551 7969 3551 8018
      3554 8020 3555 8021 3558 8021 3563 8026
      3564 8029 3567 8031 3568 8033 3570 8033
      3570 8032 3571 8032 3572 8034
TIME...MOT...LOC 1917Z 259DEG 29KT 3563 8022

10

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 3:18 PM EDT	Special Weather Statement	RAH	Davidson, Randolph	57 min
May 11, 3:55 PM EDT	Severe Thunderstorm Warning	RAH	Montgomery, Stanly	50 min
May 11, 4:34 PM EDT	Severe Thunderstorm Warning	RAH	Anson, Montgomery, Richmond, Stanly	41 min
May 11, 4:39 PM EDT	Special Weather Statement	RAH	Chatham	66 min
May 11, 4:51 PM EDT	Tornado Warning	RAH	Anson, Montgomery, Richmond, Stanly	24 min
May 11, 5:15 PM EDT	Special Weather Statement	RAH	Anson	60 min
May 11, 5:19 PM EDT	Special Weather Statement	RAH	Richmond	56 min
May 11, 5:26 PM EDT	Severe Thunderstorm Warning	RAH	Anson	64 min
May 11, 6:36 PM EDT	Special Weather Statement	RAH	Hoke	54 min
May 11, 7:34 PM EDT	Special Weather Statement	RAH	Cumberland, Sampson	56 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2019 Every severe thunderstorm warning in 2019

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.