Alert archive / South Carolina / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 20, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Apr 6, 2009, 4:49 AM EDT for Chester County, South Carolina. It was in force for 13 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Apr 6, 2009, 4:49 AM EDT (08:49 UTC)
- Expired
- Apr 6, 2009, 5:02 AM EDT
- In force
- 13 min
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Storm-based polygon
County Chester County, SC
The radar
The Columbia radar (KCAE), 83 km from the middle of the area, began a volume at 08:50 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.
The nearest sounding before it
Roanoke, VA (KRNK), launched 00:00Z, 8.8 hours before the alert went out and 316 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2936 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 179 m²/s²
- 0-3 km storm-relative helicity
- 309 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Apr 6, 3:51 AM EDT, 58 minutes earlier.
Area forecast discussion, Apr 6, 3:51 AM EDT, 58 minutes before
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</html>Hazardous weather outlook, Apr 5, 2:52 PM EDT, 13 hours 57 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 252 PM EDT SUN APR 5 2009 GAZ010-017-018-026-028-029-NCZ035>037-056-057-068>072-082-502-504- 506-508-510-SCZ001>014-019-061900- RABUN-HABERSHAM-STEPHENS-FRANKLIN-HART-ELBERT-ALEXANDER-IREDELL- DAVIE-CATAWBA-ROWAN-CLEVELAND-LINCOLN-GASTON-MECKLENBURG-CABARRUS- UNION NC-GREATER CALDWELL-GREATER BURKE-EASTERN MCDOWELL- GREATER RUTHERFORD-EASTERN POLK-OCONEE MOUNTAINS-PICKENS MOUNTAINS- GREENVILLE MOUNTAINS-GREATER OCONEE-GREATER PICKENS- GREATER GREENVILLE-SPARTANBURG-CHEROKEE-YORK-ANDERSON-ABBEVILLE- LAURENS-UNION SC-CHESTER-GREENWOOD- 252 PM EDT SUN APR 5 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST GEORGIA...PIEDMONT NORTH CAROLINA...WESTERN NORTH CAROLINA AND UPSTATE SOUTH CAROLINA. .DAY ONE...THIS AFTERNOON AND TONIGHT. SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP AHEAD OF A COLD FRONT THAT WILL SWEEP EAST ACROSS THE AREA LATE TONIGHT INTO EARLY MONDAY MORNING. IT IS POSSIBLE THAT SOME OF THE THUNDERSTORMS COULD PRODUCE DAMAGING WIND GUSTS LATE THIS EVENING INTO THE EARLY MORNING HOURS. IF THE INSTABILITY IS STRONGER THAN EXPECTED...AN ISOLATED TORNADO WOULD NOT BE OUT OF THE QUESTION...MAINLY ACROSS THE AREA SOUTH OF INTERSTATE 85. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. TEMPERATURES ARE EXPECTED TO DROP DOWN TO NEAR FREEZING EARLY TUESDAY MORNING ACROSS THE PIEDMONT BUT CLOUDINESS AND A NORTHWEST BREEZE SHOULD KEEP TEMPS FROM DROPPING TOO MUCH. THE COLD AIR WILL SETTLE ACROSS THE REGION TUESDAY NIGHT. AS IT STANDS RIGHT NOW... THERE IS A HIGH PROBABILITY THAT THE PIEDMONT WILL DROP SEVERAL DEGREES BELOW FREEZING EARLY WEDNESDAY MORNING FOR SEVERAL HOURS. IF THIS TREND CONTINUES...A FREEZE WATCH WILL BE ISSUED. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO REPORT STRONG AND/OR DAMAGING WIND GUSTS TONIGHT TO THE NATIONAL WEATHER SERVICE. NCZ033-048>052-058-061900- AVERY-MADISON-YANCEY-MITCHELL-SWAIN-HAYWOOD-GRAHAM- 252 PM EDT SUN APR 5 2009 ...WINTER STORM WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH TUESDAY EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN NORTH CAROLINA. .DAY ONE...THIS AFTERNOON AND TONIGHT. SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP AHEAD OF A COLD FRONT THAT WILL SWEEP EAST ACROSS THE AREA LATE TONIGHT INTO EARLY MONDAY MORNING. IT IS POSSIBLE THAT SOME OF THE THUNDERSTORMS COULD PRODUCE DAMAGING WIND GUSTS LATE THIS EVENING INTO THE EARLY MORNING HOURS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. WINTER STORM WATCH. WINTER STORM WATCH. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO REPORT STRONG AND/OR DAMAGING WIND GUSTS TONIGHT TO THE NATIONAL WEATHER SERVICE. NCZ053-059-062>065-501-503-505-507-509-061900- BUNCOMBE-NORTHERN JACKSON-MACON-SOUTHERN JACKSON-TRANSYLVANIA- HENDERSON-CALDWELL MOUNTAINS-BURKE MOUNTAINS-MCDOWELL MOUNTAINS- RUTHERFORD MOUNTAINS-POLK MOUNTAINS- 252 PM EDT SUN APR 5 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN NORTH CAROLINA. .DAY ONE...THIS AFTERNOON AND TONIGHT. SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP AHEAD OF A COLD FRONT THAT WILL SWEEP EAST ACROSS THE AREA LATE TONIGHT INTO EARLY MONDAY MORNING. IT IS POSSIBLE THAT SOME OF THE THUNDERSTORMS COULD PRODUCE DAMAGING WIND GUSTS LATE THIS EVENING INTO THE EARLY MORNING HOURS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. MOISTURE WILL BE PUSHED UP AND OVER THE NORTH CAROLINA MOUNTAINS BY A STRONG AND COLD NORTHWEST WIND BEGINNING MONDAY AFTERNOON. AS TEMPERATURES DROP...RAIN SHOWERS WILL CHANGE TO SNOW SHOWERS LATE MONDAY. SNOW LEVELS WILL DROP FROM AROUND FIVE THOUSAND FEET AT NOON TO THREE THOUSAND FEET BY SUNSET MONDAY EVENING. THE SNOW SHOULD MAKE IT DOWN TO THE VALLEY FLOORS BY MIDNIGHT. SNOW SHOWERS WILL CONTINUE MAINLY ALONG THE TENNESSEE BORDER THROUGHOUT THE DAY ON TUESDAY AND WILL NOT TAPER OFF UNTIL TUESDAY NIGHT. THERE IS THE POTENTIAL FOR A SIGNIFICANT ACCUMULATION OF SNOW ALONG THE TENNESSEE BORDER BEFORE IT ALL ENDS. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO REPORT STRONG AND/OR DAMAGING WIND GUSTS TONIGHT TO THE NATIONAL WEATHER SERVICE.
In the hours before
Special weather statement, Apr 6, 3:34 AM EDT, 1 hour 15 minutes before
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</html>Local storm report, Apr 6, 3:41 AM EDT, 1 hour 8 minutes before
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</html>The office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 6, 4:06 AM EDT | Winter Storm Warning | GSP | Avery, Graham, Haywood, Jackson, Madison, Mitchell and 2 more | 47 hr |
| Apr 6, 4:06 AM EDT | Winter Weather Advisory | GSP | Buncombe, Graham, Haywood, Jackson, Madison, Swain | 42 hr |
| Apr 6, 4:17 AM EDT | Freeze Watch | GSP | Alexander, Burke, Cabarrus, Caldwell, Catawba, Cleveland and 10 more | 23 hr |
| Apr 6, 4:17 AM EDT | Lake Wind Advisory | GSP | Alexander, Avery, Buncombe, Burke, Cabarrus, Caldwell and 22 more | 16 hr |
| Apr 6, 3:12 AM EDT | Severe Thunderstorm Warning | GSP | Abbeville, Anderson | 24 min |
| Apr 6, 3:46 AM EDT | Severe Thunderstorm Warning | GSP | Chester, Greenwood, Laurens, Union | 59 min |
Nearby
Severe Thunderstorm Warnings in South Carolina, 2009Every severe thunderstorm warning in 2009
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.