Alert archive / South Carolina / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 25, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at May 25, 2001, 10:01 PM EDT for York County, South Carolina. It was in force for 29 min. 3 reports 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
- May 25, 2001, 10:01 PM EDT (02:01 UTC)
- Expired
- May 25, 2001, 10:30 PM EDT
- In force
- 29 min
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Whole counties
County York County, SC
The radar
The Greer radar (KGSP), 95 km from the middle of the area, began a volume at 02:03 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 |
|---|---|---|---|
| May 25, 10:20 PM EDT | Hail 0.75 | York, SC | Two separate storm spotters reported dime-sized hail outside the York city limits. Minutes later, nickel-sized hail was reported from Rock Hill. |
| May 25, 10:20 PM EDT | Hail 0.75 | York, SC | |
| May 25, 10:30 PM EDT | Hail 0.88 | Rock Hill, SC |
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
Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 2.0 hours before the alert went out and 169 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
- 132 J/kg
- Mixed-layer CIN
- -93 J/kg
- Mixed-layer LCL
- 1477 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 165 m²/s²
- 0-3 km storm-relative helicity
- 210 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS52 KGSP 260202 SVRGSP SCC091-260230- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 1001 PM EDT FRI MAY 25 2001 THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... YORK COUNTY IN UPSTATE SOUTH CAROLINA * UNTIL 1030 PM EDT * AT 1001 PM EDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM 15 MILES SOUTHWEST OF YORK...MOVING NORTHEAST AT 35 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... SHARON AT 1010 PM EDT MCCONNELLS AT 1015 PM EDT YORK AT 1020 PM EDT ROCK HILL AT 1030 PM EDT PEOPLE IN THE PATH OF THIS SEVERE THUNDERSTORM SHOULD BE ALERT FOR LARGE HAIL AND DAMAGING WINDS. FREQUENT LIGHTNING AND LOCALLY HEAVY RAIN CAN OCCUR WITH ANY THUNDERSTORM. $$ LGL
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 Greenville-Spartanburg, SC wrote its last area forecast discussion before this severe thunderstorm warning went out at May 25, 8:50 PM EDT, 1 hour 11 minutes earlier.
Area forecast discussion, May 25, 8:50 PM EDT, 1 hour 11 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 850 PM EDT FRI MAY 25 2001 SHOWERS NOW EXITING EASTERN COUNTIES OF CWA. RUC MAINTAINS PERSISTENT BAND OF HIGH RH ACROSS EASTERN PART OF AREA OVERNIGHT. WITH ADVANCE OF SHORT WAVE TROF ALOFT... PRUDENT TO MAINTAIN LOW CHANCE POPS EASTERNMOST COUNTIES DURING FIRST PERIOD. REMAINDER OF CWA WILL HAVE CLEAR SKY WITH SOME MORNING FOG... ESPECIALLY MOUNTAIN VALLEYS. NO MAJOR CHANGES WILL BE MADE TO LOW TEMPERATURES IN ZONE FORECASTS THAT WILL BE ISSUED SHORTLY. .GSP... GA...NONE. NC...NONE. SC...NONE. LGL
In the hours before
Local storm report, May 25, 9:55 PM EDT, 6 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE SPARTANBURG SC
955 PM EDT FRI MAY 25 2001
TIME(EDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
945 PM UNION SC MARBLE SIZE HAIL
05/25/01 UNION REPORT FROM COUNTY EPD
DIRECTOR AND 911 DISPATCH
LGLThe office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 25, 10:29 PM EDT | Severe Thunderstorm Warning | GSP | York | 46 min |
Nearby
Severe Thunderstorm Warnings in South Carolina, 2001Every 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.