Alert archive / South Carolina / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 2, NWS Columbia, SC
NWS Columbia, SC issued this severe thunderstorm warning at Feb 19, 1999, 10:13 AM EST for Aiken County, South Carolina. It was in force for 47 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
- Feb 19, 1999, 10:13 AM EST (15:13 UTC)
- Expired
- Feb 19, 1999, 11:00 AM EST
- In force
- 47 min
- Issued by
- NWS Columbia, SC
- Area
- Whole counties
County Aiken County, SC
The radar
The Columbia radar (KCAE), 66 km from the middle of the area, began a volume at 15:17 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 |
|---|---|---|---|
| Feb 19, 10:20 AM EST | Hail 1.75 | Aiken, SC | Sheriff reported golf ball size hail west of Aiken. |
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, 3.2 hours before the alert went out and 168 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
- 18 J/kg
- Mixed-layer CIN
- -96 J/kg
- Mixed-layer LCL
- 657 m above ground
- 0-6 km bulk shear
- 75 kt
- 0-1 km storm-relative helicity
- 216 m²/s²
- 0-3 km storm-relative helicity
- 249 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
999 WUUS1 KCAE 191519 RRA SVRCAE SCC003-191600- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE COLUMBIA SC 1013 AM EST FRI FEB 19 1999 THE NATIONAL WEATHER SERVICE IN COLUMBIA SC HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... AIKEN COUNTY IN SOUTH CAROLINA * UNTIL 1100 AM EST * NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM NEAR NORTH AUGUSTA MOVING NORTHEAST AT 35 MILES AN HOUR. THIS STORM HAS PRODUCED HAIL IN PARTS OF THE AUGUSTA AREA AS IT MOVED OVER. RADAR INDICATES HAIL SIZE IS INCREASING. G.
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.
In the hours before
Special weather statement, Feb 19, 5:49 AM EST, 4 hours 24 minutes before
SCZ015-016-018-020-021-022-025-026-027-028-029-030-031-035-036- 037-038-041-GAZ040-063-064-065-077-191630- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE COLUMBIA SC 549 AM EST FRI FEB 19 1999 THE SEVERE WEATHER OUTLOOK PERTAINS TO THE FOLLOWING COUNTIES IN SOUTH CAROLINA: AIKEN BAMBERG BARNWELL CALHOUN CHESTERFIELD CLARENDON EDGEFIELD FAIRFIELD KERSHAW LANCASTER LEE LEXINGTON MCCORMICK NEWBERRY ORANGEBURG RICHLAND SALUDA SUMTER THE SEVERE WEATHER OUTLOOK PERTAINS TO THE FOLLOWING COUNTIES IN GEORGIA: BURKE COLUMBIA LINCOLN MCDUFFIE RICHMOND ...ISOLATED THUNDERSTORMS TODAY... AN APPROACHING UPPER LEVEL DISTURBANCE WILL CONTRIBUTE TO SHOWER DEVELOPMENT WITH ISOLATED THUNDERSTORMS TODAY. SOME OF THE THUNDERSTORMS WILL HAVE THE POTENTIAL TO PRODUCE SMALL HAIL UP TO 1/2 INCH IN DIAMETER...AND BRIEF WIND GUSTS UP TO 30 MPH. CURRENT DATA DOES NOT FAVOR SEVERE THUNDERSTORM DEVELOPMENT. THEREFORE...EMERGENCY MANAGEMENT AND SPOTTER ACTIVATION SHOULD NOT BE REQUIRED. MILLER
Special weather statement, Feb 19, 5:49 AM EST, 4 hours 24 minutes before
SCZ015-016-018-020-021-022-025-026-027-028-029-030-031-035-036- 037-038-041-GAZ040-063-064-065-077-191630- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE COLUMBIA SC 549 AM EST FRI FEB 19 1999 THE SEVERE WEATHER OUTLOOK PERTAINS TO THE FOLLOWING COUNTIES IN SOUTH CAROLINA: AIKEN BAMBERG BARNWELL CALHOUN CHESTERFIELD CLARENDON EDGEFIELD FAIRFIELD KERSHAW LANCASTER LEE LEXINGTON MCCORMICK NEWBERRY ORANGEBURG RICHLAND SALUDA SUMTER THE SEVERE WEATHER OUTLOOK PERTAINS TO THE FOLLOWING COUNTIES IN GEORGIA: BURKE COLUMBIA LINCOLN MCDUFFIE RICHMOND ...ISOLATED THUNDERSTORMS TODAY... AN APPROACHING UPPER LEVEL DISTURBANCE WILL CONTRIBUTE TO SHOWER DEVELOPMENT WITH ISOLATED THUNDERSTORMS TODAY. SOME OF THE THUNDERSTORMS WILL HAVE THE POTENTIAL TO PRODUCE SMALL HAIL UP TO 1/2 INCH IN DIAMETER...AND BRIEF WIND GUSTS UP TO 30 MPH. CURRENT DATA DOES NOT FAVOR SEVERE THUNDERSTORM DEVELOPMENT. THEREFORE...EMERGENCY MANAGEMENT AND SPOTTER ACTIVATION SHOULD NOT BE REQUIRED. MILLER
The office that day
Everything else NWS Columbia, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 19, 12:56 PM EST | Tornado Warning | CAE | Orangeburg | 19 min |
| Feb 19, 1:35 PM EST | Tornado Warning | CAE | Calhoun | 40 min |
| Feb 19, 2:22 PM EST | Severe Thunderstorm Warning | CAE | Clarendon, Orangeburg | 38 min |
Nearby
Severe Thunderstorm Warnings in South Carolina, 1999Every severe thunderstorm warning in 1999
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.