Alert archive / South Carolina / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 171, NWS Columbia, SC
NWS Columbia, SC issued this severe thunderstorm warning at Jun 29, 1998, 4:20 PM EDT for Calhoun County, South Carolina. It was in force for 25 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 29, 1998, 4:20 PM EDT (20:20 UTC)
- Expired
- Jun 29, 1998, 4:45 PM EDT
- In force
- 25 min
- Issued by
- NWS Columbia, SC
- Area
- Whole counties
County Calhoun County, SC
The radar
The Columbia radar (KCAE), 44 km from the middle of the area, began a volume at 20:21 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 |
|---|---|---|---|
| Jun 29, 4:30 PM EDT | Hail 0.75 | Lone Star, SC | Sheriff reported dime size hail. |
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, 8.3 hours before the alert went out and 113 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
- 1828 J/kg
- Mixed-layer CIN
- -93 J/kg
- Mixed-layer LCL
- 1350 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -16 m²/s²
- 0-3 km storm-relative helicity
- -10 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
626 WUUS1 KCAE 292026 RRA SVRCAE SCC017-292045- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE COLUMBIA SC 420 PM EDT MON JUN 29 1998 THE NATIONAL WEATHER SERVICE IN COLUMBIA SC HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN CALHOUN COUNTY IN SOUTH CAROLINA * UNTIL 445 PM EDT * AT 419 PM NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM EAST OF ST MATTHEWS MOVING EAST TOWARD THE NORTH END OF LAKE MARION. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG BUILDING. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. 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.
In the hours before
Special weather statement, Jun 29, 11:30 AM EDT, 4 hours 50 minutes before
SCZ015-016-018-020-021-022-025-026-027-028-029-030-031-035- 036-037-038-041-GAZ040-063-064-065-077-292300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE COLUMBIA SC 1130 AM EDT MON JUN 29 1998 THE HEAT ADVISORY ISSUED FOR MOST OF SOUTH CAROLINA AND GEORGIA INCLUDES ALL OF CENTRAL SOUTH CAROLINA AND THE CENTRAL SAVANNAH RIVER AREA OF GEORGIA. HIGH TEMPERATURES OF 100 TO 105 WILL OCCUR THIS AFTERNOON. THESE TEMPERATURES COMBINED WITH HIGH HUMIDITY WILL RESULT IN HEAT INDEX VALUES AROUND 110. A LARGE HIGH PRESSURE SYSTEM OVER THE SOUTHEAST US HAS KEPT A VERY HOT AND HUMID AIR MASS OVER SOUTH CAROLINA FOR THE PAST SEVERAL DAYS. THIS SYSTEM WILL WEAKEN WEDNESDAY AS A WEAK COLD FRONT APPROACHES. HOWEVER FOR TODAY AND TUESDAY HOT HUMID CONIDITIONS WILL CONTINUE. CHILDREN...THE ELDERLY AND PEOPLE WITH CHRONIC AILMENTS ARE USUALLY THE FIRST TO SUFFER FROM THE HEAT. HEAT EXHAUSTION... CRAMPS...OR IN EXTREME CASES...HEAT STROKE CAN RESULT FROM PROLONGED EXPOSURE TO THESE CONDITIONS. FRIENDS...RELATIVES OR NEIGHBORS SHOULD CHECK ON PEOPLE AT RISK. REDUCE OUTDOOR ACTIVITIES...DRINK LOTS OF WATER OR OTHER NON- ALCOHOLIC BEVERAGES...WEAR LIGHT COLORED/LIGHT WEIGHT CLOTHES AND...IF POSSIBLE...SPEND MORE TIME IN AIR CONDITIONED OR WELL VENTILATED PLACES. TA
Special weather statement, Jun 29, 11:30 AM EDT, 4 hours 50 minutes before
SCZ015-016-018-020-021-022-025-026-027-028-029-030-031-035- 036-037-038-041-GAZ040-063-064-065-077-292300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE COLUMBIA SC 1130 AM EDT MON JUN 29 1998 THE HEAT ADVISORY ISSUED FOR MOST OF SOUTH CAROLINA AND GEORGIA INCLUDES ALL OF CENTRAL SOUTH CAROLINA AND THE CENTRAL SAVANNAH RIVER AREA OF GEORGIA. HIGH TEMPERATURES OF 100 TO 105 WILL OCCUR THIS AFTERNOON. THESE TEMPERATURES COMBINED WITH HIGH HUMIDITY WILL RESULT IN HEAT INDEX VALUES AROUND 110. A LARGE HIGH PRESSURE SYSTEM OVER THE SOUTHEAST US HAS KEPT A VERY HOT AND HUMID AIR MASS OVER SOUTH CAROLINA FOR THE PAST SEVERAL DAYS. THIS SYSTEM WILL WEAKEN WEDNESDAY AS A WEAK COLD FRONT APPROACHES. HOWEVER FOR TODAY AND TUESDAY HOT HUMID CONIDITIONS WILL CONTINUE. CHILDREN...THE ELDERLY AND PEOPLE WITH CHRONIC AILMENTS ARE USUALLY THE FIRST TO SUFFER FROM THE HEAT. HEAT EXHAUSTION... CRAMPS...OR IN EXTREME CASES...HEAT STROKE CAN RESULT FROM PROLONGED EXPOSURE TO THESE CONDITIONS. FRIENDS...RELATIVES OR NEIGHBORS SHOULD CHECK ON PEOPLE AT RISK. REDUCE OUTDOOR ACTIVITIES...DRINK LOTS OF WATER OR OTHER NON- ALCOHOLIC BEVERAGES...WEAR LIGHT COLORED/LIGHT WEIGHT CLOTHES AND...IF POSSIBLE...SPEND MORE TIME IN AIR CONDITIONED OR WELL VENTILATED PLACES. TA
The office that day
Everything else NWS Columbia, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 7:28 PM EDT | Severe Thunderstorm Warning | CAE | Kershaw | 32 min |
Nearby
Severe Thunderstorm Warnings in South Carolina, 1998Every severe thunderstorm warning in 1998
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.