Alert archive / South Carolina / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 80, NWS Columbia, SC

August 11, 2001Richland County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Aug 11, 2001, 12:22 AM EDT for Richland County, South Carolina. It was in force for 23 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Aug 11, 2001, 12:22 AM EDT (04:22 UTC)
Expired: Aug 11, 2001, 12:45 AM EDT
In force: 23 min
Issued by: NWS Columbia, SC
Area: Whole counties

County Richland County, SC

The radar

The Columbia radar (KCAE), 21 km from the middle of the area, began a volume at 04:23 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.

What was reported inside it

Time	Report	Where	Remark
Aug 11, 12:36 AM EDT	Thunderstorm Wind 50 E	Columbia, SC	Off duty TV meteorologist reported trees down on Farrow road near I-77.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 4.4 hours before the alert went out and 150 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: 3215 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 955 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

581 
WUUS52 KCAE 110423
SVRCAE
SCC079-110445-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
1222 AM EDT SAT AUG 11 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
    NORTHERN RICHLAND COUNTY IN CENTRAL SOUTH CAROLINA

* UNTIL 1245 AM EDT.

* AT 1222 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER ARCADIA LAKES...OR ABOUT 8 MILES WEST OF
  COLUMBIA...MOVING NORTH AT 15 MPH.

THIS STORM WILL PRODUCE DAMAGING WINDS IN EXCESS OF 55 MPH.

LM

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 Aug 10, 9:53 PM EDT, 2 hours 29 minutes earlier.

Area forecast discussion, Aug 10, 9:53 PM EDT, 2 hours 29 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE COLUMBIA SC
953 PM EDT FRI AUG 10 2001

AFTER FURTHER REVIEW...CONVECTION FIRED UP ALONG SAV RIVER...BURKE
COUNTY STORM IMPRESSIVE. INTERACTION BETWEEN SEA BREEZE FRONT AND GA
CONVECTION. TOPS STILL COOLING DOWN THERE...LOW LEVEL CONVERGENCE
STRONG...MODERATE INSTABILITY...WILL UP POPS TO LIKELY IN THE
SOUTHEASTERN ZONES. SLIGHT CHANCE EAST MIDLANDS AND ISOLATED WEST.

FCSTID = 19
CAE   75  93  73  91 /  10  40  40  40
AGS   74  94  72  92 /  10  40  40  40
SSC   75  93  73  91 /  20  40  40  40
OGB   75  93  73  91 /  20  40  40  40

.CAE...
GA...NONE.
SC...NONE.

AWP

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 10:02 PM EDT	Severe Thunderstorm Warning	CAE	Bamberg	28 min
Aug 10, 10:30 PM EDT	Severe Thunderstorm Warning	CAE	Bamberg	30 min
Aug 10, 11:35 PM EDT	Severe Thunderstorm Warning	CAE	Richland	25 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2001 Every severe thunderstorm warning in 2001

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.