Alert archive / South Carolina / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 66, NWS Columbia, SC

June 27, 2001Barnwell County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Jun 27, 2001, 3:18 PM EDT for Barnwell County, South Carolina. It was in force for 27 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: Jun 27, 2001, 3:18 PM EDT (19:18 UTC)
Expired: Jun 27, 2001, 3:45 PM EDT
In force: 27 min
Issued by: NWS Columbia, SC
Area: Whole counties

County Barnwell County, SC

What was reported inside it

Time	Report	Where	Remark
Jun 27, 3:30 PM EDT	Thunderstorm Wind 50 E	Barnwell, SC	Savannah River Site reported trees down and a guard shack overturned.

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 12:00Z, 7.3 hours before the alert went out and 140 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: 2760 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 553 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 43 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

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

000 
WUUS52 KCAE 271919
SVRCAE

SCC011-271945-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
318 PM EDT WED JUN 27 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
    WESTERN BARNWELL COUNTY IN CENTRAL SOUTH CAROLINA

* UNTIL 345 PM EDT.

* AT 317 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER BARNWELL COUNTY...OR ABOUT 16 MILES WEST
  OF BARNWELL...MOVING NORTH AT 10 MPH.

THIS STORM WILL PRODUCE DIME SIZE HAIL.

THIS STORM IS CAPABLE OF PRODUCING VERY HEAVY RAIN...WHICH MAY FLOOD
ROADS...DITCHES AND LOW-LYING AREAS. AVOID THESE AREAS AND DO NOT
CROSS FLOODED ROADS AS THEY MAY BE WASHED OUT. SEEK HIGHER GROUND IF
THREATENED BY FLOOD WATERS.

JDB

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 Jun 27, 2:20 PM EDT, 58 minutes earlier.

Area forecast discussion, Jun 27, 2:20 PM EDT, 58 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE COLUMBIA SC
220 PM EDT WED JUN 27 2001

CONVECTION THIS AFTERNOON DEVELOPING ALONG SEA BREEZE FRONT AND SFC
THETA-E AXIS EXTENDING NORTH FROM THE CSRA INTO MIDLANDS. GOOD LOW
LEVEL CONVERGENCE EAST AND SOUTH OF CAE. INSTABILITY MODERATE TO
VERY UNSTABLE WITH SFC BASED LI FROM -5 TO -8. CAPE 2500-3500 J/KG.
WEAK WATER VAPOR INDICATING UPPER LOW CONTINUES TO MOVE NORTHWEST
INTO MIDWEST. UPPER LEVEL HIGH ALONG CAROLINA COAST. TROPICAL
MOISTURE ASSOCIATED WITH EASTERLY WAVE ALONG EAST COAST FL SPREADING
NORTH BUT REMAINING MAINLY OFFSHORE AT THE MOMENT. WEAK 700MB LIFT
THIS EVENING EXPECT TSTMS TO REMAIN ISOLATED-SCT MAINLY SOUTH OF CAE
DURING EVENING THEN DISSIPATE. MID LEVEL RIDGE OFF NORTH CAROLINA
COAST THU WITH 850MB-700MB MOISTURE FLUX INCREASING ACROSS AREA WITH
SOUTH-SOUTHEAST FLOW. BEST 700MB LIFT FROM THE LOW COUNTRY NORTHWEST
THRU CSRA...WILL GO GOOD CHANCE AGS AREA...CHANCE CAE AND NORTH.
INSTABILITY LOOKS WEAKER WITH WARMER TEMPS ALOFT AND INCREASING MID
LEVEL CLOUDS. PRECIP WATER HIGH 1.5 TO 1.8 INCHES SUGGEST POTENTIAL
FOR HEAVY TROPICAL SHOWERS. META INDICATING STRONG MID LEVEL SHORT
WAVE APPROACHING FROM THE SOUTH FRI AFTERNOON WITH GOOD
LIFT...ESPECIALLY IN THE CSRA. INSTABILITY LOOKS MODERATE WITH CAPE
AROUND 2000 J/KG...INCREASING MOISTURE AS SEEN BY T-SECTIONS...WILL
CONTINUE GOOD CHANCE POPS AGS AND CHANCE CAE AND NORTH. HIGHS BELOW
GUIDANCE WITH INCREASING CLOUDS/MOISTURE AND LOWS NEAR GUIDANCE.

EXTENDED...WEAK SHORT WAVES MAY MOVE ACROSS THE AREA THRU PERIOD.
MODELS INDICATE TYPICAL SUMMER TIME HUMID AIRMASS EACH DAY. UPPER
TROF REMAINS STATIONARY IN THE MIDWEST OR MAY MOVE SOUTHWEST. PREFER
MRF/ECMWF. TROF DEVELOPING IN THE NORTHEAST EARLY TO MID NEXT
WEEK...ASSOCIATED SURFACE COLD FRONT STAYS TO OUR NORTH THROUGH
MONDAY AND POSSIBLY TUE.

FCSTID = 19
CAE   70  89  70  88 /  20  40  30  40
AGS   69  87  70  87 /  30  50  40  50
SSC   70  89  70  88 /  20  40  30  40
OGB   69  87  70  87 /  30  50  40  50

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

AWP

In the hours before

Local storm report, Jun 27, 2:52 PM EDT, 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA, SC
252 PM EDT WED JUN 27 2001

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....
g
230 PM     ORANGEBURG                SC   .75 INCH HAIL
06/27/01   ORANGEBURG                     REPORTED BY ORANGEBURG
                                          EMERGENCY SVC

BLP

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 27, 2:16 PM EDT	Severe Thunderstorm Warning	CAE	Orangeburg	29 min
Jun 27, 3:53 PM EDT	Severe Thunderstorm Warning	CAE	Richland	52 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.