Alert archive / South Carolina / Tornado Watches in 2004
Tornado Watch 843
The Storm Prediction Center issued this tornado watch at Sep 27, 2004, 10:40 AM EDT for 18 counties in Georgia; 28 counties in South Carolina. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 27, 2004, 10:40 AM EDT (14:40 UTC)
- Expired
- Sep 27, 2004, 5:00 PM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 46 counties
Bryan County, GA, Bulloch County, GA, Burke County, GA, Candler County, GA, Chatham County, GA, Effingham County, GA, Emanuel County, GA, Evans County, GA, Jefferson County, GA, Jenkins County, GA, Johnson County, GA, Liberty County, GA, Long County, GA, McIntosh County, GA, Richmond County, GA, Screven County, GA, Tattnall County, GA, Washington County, GA, Aiken County, SC, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Beaufort County, SC, Berkeley County, SC, Calhoun County, SC, Charleston County, SC, Chesterfield County, SC, Clarendon County, SC, Colleton County, SC, Darlington County, SC, Dillon County, SC, Dorchester County, SC, Florence County, SC, Georgetown County, SC, Hampton County, SC, Horry County, SC, Jasper County, SC, Kershaw County, SC, Lee County, SC, Lexington County, SC, Marion County, SC, Marlboro County, SC, Orangeburg County, SC, Richland County, SC, Sumter County, SC, Williamsburg County, SC
The radar
The Charleston,SC radar (KCLX), 51 km from the middle of the area, began a volume at 14:41 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.
Warnings issued inside it
12 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 27, 12:36 PM EDT | Tornado Warning | ILM | Georgetown | 39 min |
| Sep 27, 1:04 PM EDT | Tornado Warning | ILM | Williamsburg | 26 min |
| Sep 27, 1:05 PM EDT | Tornado Warning | ILM | Darlington, Florence | 25 min |
| Sep 27, 1:30 PM EDT | Tornado Warning | CAE | Aiken | 15 min |
| Sep 27, 1:33 PM EDT | Tornado Warning | ILM | Florence, Marion | 27 min |
| Sep 27, 2:07 PM EDT | Tornado Warning | CAE | Aiken | 23 min |
| Sep 27, 2:08 PM EDT | Tornado Warning | ILM | Florence, Marion | 37 min |
| Sep 27, 2:34 PM EDT | Tornado Warning | ILM | Dillon, Marlboro | 26 min |
| Sep 27, 2:54 PM EDT | Tornado Warning | CAE | Lexington, Saluda | 36 min |
| Sep 27, 3:03 PM EDT | Tornado Warning | ILM | Marlboro | 57 min |
| Sep 27, 3:05 PM EDT | Tornado Warning | ILM | Marlboro | 55 min |
| Sep 27, 4:31 PM EDT | Tornado Warning | ILM | Marion | 59 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Charleston AFB, SC (KCHS), launched 12:00Z, 2.7 hours before the alert went out and 104 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.
- Mixed-layer CAPE
- 1064 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 509 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 124 m²/s²
- 0-3 km storm-relative helicity
- 137 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 2.7
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 271443
SEL3
SPC WW 271440
GAZ000-SCZ000-CWZ000-272100-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 843
NWS STORM PREDICTION CENTER NORMAN OK
1040 AM EDT MON SEP 27 2004
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
EASTERN GEORGIA
CENTRAL AND EASTERN SOUTH CAROLINA
COASTAL WATERS
EFFECTIVE THIS MONDAY MORNING AND AFTERNOON FROM 1040 AM UNTIL 500
PM EDT.
TORNADOES...HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS ALONG AND 70 STATUTE MILES EITHER SIDE
OF A LINE FROM 60 MILES WEST OF SAVANNAH GEORGIA TO 40 MILES EAST
OF FLORENCE SOUTH CAROLINA.
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.
DISCUSSION...STORMS EMBEDDED IN OUTER BANDS OF JEANNE ARE IN REGION
OF STRONG LOW LEVEL VERTICAL SHEAR AND RATHER HIGH SURFACE DEWPOINTS
OVER EASTERN GA AND CENTRAL/EASTERN SC. THESE STORMS MAY INTERACT
WITH WEAK SURFACE BOUNDARIES...ENHANCING THE RISK OF ISOLATED
TORNADOES TODAY.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550.
MEAN STORM MOTION VECTOR 13040.
...HART
325,0825 350,0794 332,0781 311,0813SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 27, 12:35 AM EDT | Tornado Watch | SPC | Appling, Atkinson, Bacon, Ben Hill, Berrien, Brantley and 36 more | 8 hr |
| Sep 27, 4:47 AM EDT | Mesoscale Discussion | SPC | Appling, Ben Hill, Bryan, Bulloch, Candler, Chatham and 15 more | 118 min |
| Sep 27, 7:38 AM EDT | Mesoscale Discussion | SPC | Bryan, Chatham, Effingham | 2 hr |
| Sep 27, 10:27 AM EDT | Mesoscale Discussion | SPC | Baldwin, Bryan, Bulloch, Burke, Camden, Candler and 28 more | 2 hr |
| Sep 27, 6:05 PM EDT | Mesoscale Discussion | SPC | Banks, Franklin, Habersham, Hart, Madison, Rabun and 1 more | 115 min |
| Sep 26, 9:53 PM EDT | Mesoscale Discussion | SPC | Beaufort, Berkeley, Charleston, Colleton, Dorchester, Hampton and 1 more | 2 hr |
| Sep 27, 3:24 PM EDT | Mesoscale Discussion | SPC | Bamberg, Berkeley, Calhoun, Chesterfield, Clarendon, Colleton and 15 more | 96 min |
| Sep 27, 3:50 PM EDT | Tornado Watch | SPC | Bamberg, Berkeley, Calhoun, Charleston, Chesterfield, Clarendon and 17 more | 6 hr |
| Sep 27, 6:31 PM EDT | Mesoscale Discussion | SPC | Berkeley, Calhoun, Chester, Chesterfield, Clarendon, Darlington and 16 more | 119 min |
Nearby
Tornado Watches in South Carolina, 2004Tornado Watches in Georgia, 2004Every tornado watch in 2004
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.