Alert archive / South Carolina / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 76, NWS Columbia, SC

May 24, 2017Aiken County, Lexington County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at May 24, 2017, 11:35 PM EDT for Aiken County, Lexington County, South Carolina. It was in force for 44 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 24, 2017, 11:35 PM EDT (03:35 UTC)
Expired: May 25, 2017, 12:19 AM EDT
In force: 44 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Aiken County, SC, Lexington County, SC

The radar

The Columbia radar (KCAE), 40 km from the middle of the area, began a volume at 03:36 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 00:00Z, 3.6 hours before the alert went out and 163 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: 166 J/kg
Mixed-layer CIN: -79 J/kg
Mixed-layer LCL: 802 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: 135 m²/s²
0-3 km storm-relative helicity: 144 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.1

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 Columbia, SC wrote its last area forecast discussion before this severe thunderstorm warning went out at May 24, 7:09 PM EDT, 4 hours 26 minutes earlier.

Area forecast discussion, May 24, 7:09 PM EDT, 4 hours 26 minutes before

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Hazardous weather outlook, May 24, 6:00 PM EDT, 5 hours 35 minutes before

Hazardous Weather Outlook
National Weather Service Columbia SC
600 PM EDT Wed May 24 2017

GAZ063>065-077-SCZ016-022-025-027>031-035>038-041-252200-
McDuffie-Columbia-Richmond-Burke-Chesterfield-Kershaw-Edgefield-
Lexington-Richland-Lee-Aiken-Sumter-Barnwell-Orangeburg-Calhoun-
Clarendon-Bamberg-
600 PM EDT Wed May 24 2017

...FLASH FLOOD WATCH IN EFFECT UNTIL 9 PM EDT THIS EVENING...
...TORNADO WATCH 263 IN EFFECT UNTIL 9 PM EDT THIS EVENING...

This Hazardous Weather Outlook is for the Midlands of South Carolina
and the Central Savannah River area of Georgia.

.DAY ONE...Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Tornado Watch.
   Flash Flood Watch.

Numerous to widespread showers and thunderstorms are expected this
afternoon and evening. A few of these thunderstorms could become
strong and be capable of producing tornadoes and damaging wind gusts.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

GAZ040-SCZ015-018-020-021-026-252200-
Lincoln-Lancaster-McCormick-Newberry-Fairfield-Saluda-
600 PM EDT Wed May 24 2017

...FLASH FLOOD WATCH IN EFFECT UNTIL 9 PM EDT THIS EVENING...
...TORNADO WATCH 262 IN EFFECT UNTIL 9 PM EDT THIS EVENING...

This Hazardous Weather Outlook is for the Midlands of South Carolina
and the Central Savannah River area of Georgia.

.DAY ONE...Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Tornado Watch.
   Flash Flood Watch.

Numerous to widespread showers and thunderstorms are expected this
afternoon and evening. A few of these thunderstorms could become
strong and be capable of producing tornadoes and damaging wind gusts.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Local storm report, May 24, 7:05 PM EDT, 4 hours 30 minutes before

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Local storm report, May 24, 7:08 PM EDT, 4 hours 27 minutes before

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Local storm report, May 24, 7:12 PM EDT, 4 hours 23 minutes before

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Local storm report, May 24, 7:32 PM EDT, 4 hours 3 minutes before

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Local storm report, May 24, 7:53 PM EDT, 3 hours 42 minutes before

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Local storm report, May 24, 7:54 PM EDT, 3 hours 41 minutes before

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The office that day

Everything else NWS Columbia, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 24, 11:09 PM EDT	Severe Thunderstorm Warning	CAE	Aiken, Edgefield	36 min
May 25, 12:11 AM EDT	Special Weather Statement	CAE	Richland	34 min
May 25, 12:30 AM EDT	Special Weather Statement	CAE	Kershaw	30 min
May 25, 12:47 AM EDT	Special Weather Statement	CAE	Lancaster	28 min
May 25, 1:11 AM EDT	Special Weather Statement	CAE	Chesterfield	34 min
May 25, 9:19 AM EDT	River Flood Warning	CAE	Chesterfield, Marlboro	60 hr
May 25, 1:12 PM EDT	Special Weather Statement	CAE	Calhoun, Clarendon, Lee, Richland, Sumter	48 min
May 24, 10:35 PM EDT	Special Weather Statement	CAE	Richmond	25 min
May 24, 10:48 PM EDT	Special Weather Statement	CAE	Richmond	27 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2017 Every severe thunderstorm warning in 2017

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.