Alert archive / South Carolina / Special Weather Statements in 2021

Special Weather Statement, NWS Wilmington, NC

May 4, 2021Georgetown County, South Carolina

NWS Wilmington, NC issued this special weather statement at May 4, 2021, 4:50 PM EDT for Georgetown County, South Carolina. It was in force for 40 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: May 4, 2021, 4:50 PM EDT (20:50 UTC)
Expired: May 4, 2021, 5:30 PM EDT
In force: 40 min
Issued by: NWS Wilmington, NC

County Georgetown County, SC

The radar

The Wilmington radar (KLTX), 128 km from the middle of the area, began a volume at 20:50 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

Charleston AFB, SC (KCHS), launched 12:00Z, 8.8 hours before the alert went out and 62 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: 573 J/kg
Mixed-layer CIN: -149 J/kg
Mixed-layer LCL: 1000 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 48 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

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

NWS Wilmington, NC wrote its last area forecast discussion before this special weather statement went out at May 4, 3:56 PM EDT, 54 minutes earlier.

Area forecast discussion, May 4, 3:56 PM EDT, 54 minutes before

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Hazardous weather outlook, May 4, 3:35 PM EDT, 1 hour 15 minutes before

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In the hours before

Special weather statement, May 4, 4:50 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service Wilmington NC
450 PM EDT Tue May 4 2021

SCZ039-055-056-042130-
Coastal Georgetown SC-Williamsburg SC-Inland Georgetown SC-
450 PM EDT Tue May 4 2021

...SPECIAL WEATHER STATEMENT FOR SOUTHWESTERN GEORGETOWN AND
SOUTHEASTERN WILLIAMSBURG COUNTIES UNTIL 530 PM EDT...

At 450 PM EDT, Doppler radar was tracking a strong thunderstorm near
Jamestown, or 16 miles northwest of McClellanville, moving northeast
at 35 mph.

Pea size hail and winds in excess of 30 mph will be possible with
this storm.

Locations impacted include...
Georgetown, Andrews, Lambert, Sampit, Graves, Oatland and Georgetown
Memorial Hospital.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Thunderstorms can pose a variety of threats including gusty winds,
small hail, cloud to ground lightning, and localized flooding. It is
recommended that you remain indoors until the storm passes.

&&

LAT...LON 3322 7945 3324 7946 3323 7947 3324 7947
      3324 7948 3325 7948 3324 7949 3325 7955
      3327 7955 3326 7956 3327 7956 3330 7966
      3332 7971 3332 7974 3335 7977 3360 7941
      3339 7918
TIME...MOT...LOC 2050Z 231DEG 32KT 3323 7968

VAO

The office that day

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

Issued	Product	Office	Counties	Lasted
May 3, 9:04 PM EDT	Special Marine Warning	ILM		26 min
May 3, 9:31 PM EDT	Special Marine Warning	ILM		44 min
May 3, 10:14 PM EDT	Special Marine Warning	ILM		61 min
May 4, 6:12 AM EDT	Small Craft Advisory	ILM		38 hr
May 4, 5:57 PM EDT	Severe Thunderstorm Warning	ILM	Robeson	33 min
May 4, 6:30 PM EDT	Severe Thunderstorm Warning	ILM	Robeson	30 min
May 4, 6:55 PM EDT	Special Weather Statement	ILM	Bladen, Robeson	35 min
May 3, 8:47 PM EDT	Severe Thunderstorm Warning	ILM	Georgetown	43 min
May 4, 5:08 PM EDT	Severe Thunderstorm Warning	ILM	Darlington, Marlboro	52 min
May 4, 6:26 PM EDT	Special Weather Statement	ILM	Dillon, Florence	49 min
May 4, 7:04 PM EDT	Severe Thunderstorm Warning	ILM	Florence, Williamsburg	41 min
May 4, 7:42 PM EDT	Severe Thunderstorm Warning	ILM	Florence, Georgetown, Marion, Williamsburg	33 min

Nearby

Special Weather Statements in South Carolina, 2021 Every special weather statement 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.