Alert archive / South Carolina / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 252, NWS Charleston, SC
NWS Charleston, SC issued this severe thunderstorm warning at Aug 22, 2011, 6:42 PM EDT for Charleston County, Colleton County, Dorchester County, South Carolina. It was in force for 63 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 22, 2011, 6:42 PM EDT (22:42 UTC)
- Expired
- Aug 22, 2011, 7:45 PM EDT
- In force
- 63 min
- Issued by
- NWS Charleston, SC
- Area
- Storm-based polygon
Counties Charleston County, SC, Colleton County, SC, Dorchester County, SC
The radar
The Charleston,SC radar (KCLX), 73 km from the middle of the area, began a volume at 22:44 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
Charleston AFB, SC (KCHS), launched 12:00Z, 10.7 hours before the alert went out and 29 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
- 2258 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 686 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 105 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
804 WUUS52 KCHS 222242 SVRCHS SCC019-029-035-222345- /O.NEW.KCHS.SV.W.0252.110822T2242Z-110822T2345Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHARLESTON SC 642 PM EDT MON AUG 22 2011 THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WEST CENTRAL CHARLESTON COUNTY IN SOUTHEAST SOUTH CAROLINA... EAST CENTRAL COLLETON COUNTY IN SOUTHEAST SOUTH CAROLINA... SOUTHEASTERN DORCHESTER COUNTY IN SOUTHEAST SOUTH CAROLINA... * UNTIL 745 PM EDT * AT 639 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...6 MILES NORTHEAST OF JACKSONBORO...MOVING SOUTH AT 10 MPH. PREPARE NOW FOR THE FOLLOWING HAZARDS... DAMAGING WINDS IN EXCESS OF 60 MPH... TORRENTIAL RAIN WHICH MAY PRODUCE LOCALIZED FLOODING... * SOME LOCATIONS IN THE WARNING INCLUDE... DELEMAR CROSSROADS...SLANDS BRIDGE...JACKSONBORO...JACKSONBORO... RAVENEL...ASHEPOO...HOLLYWOOD... PRECAUTIONARY/PREPAREDNESS ACTIONS... REPORT HAIL...DOWNED TREES...LIMBS...AND POWER LINES DIRECTLY TO THE CHARLESTON NATIONAL WEATHER SERVICE AT 1-888-383-2024. && LAT...LON 3271 8000 3259 8056 3290 8060 3298 8020 TIME...MOT...LOC 2242Z 355DEG 8KT 3283 8040 $$
4 follow-up statements
431 WWUS52 KCHS 222259 SVSCHS SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE CHARLESTON SC 659 PM EDT MON AUG 22 2011 SCC019-029-035-222345- /O.CON.KCHS.SV.W.0252.000000T0000Z-110822T2345Z/ DORCHESTER SC-CHARLESTON SC-COLLETON SC- 659 PM EDT MON AUG 22 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT FOR EAST CENTRAL COLLETON...WEST CENTRAL CHARLESTON AND SOUTHEASTERN DORCHESTER COUNTIES... AT 657 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A LINE OF SEVERE THUNDERSTORMS. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM COOKE CROSSROADS TO JACKSONBORO...OR ALONG A LINE EXTENDING FROM MIDDLETON PLACE TO 15 MILES SOUTHEAST OF WALTERBORO...MOVING SOUTH AT 10 MPH. SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...ADAMS RUN...ASHEPOO...DELEMAR CROSSROADS...HOLLYWOOD...JACKSONBORO...JOHNS ISLAND...MEGGETT...RAVENEL...WADMALAW ISLAND AND YONGES ISLAND. PRECAUTIONARY/PREPAREDNESS ACTIONS... A SEVERE THUNDERSTORM IS CAPABLE OF PRODUCING LARGE HAIL...DAMAGING WINDS OF 58 MPH OR GREATER...DEADLY LIGHTNING AND VERY HEAVY RAIN. GO INSIDE A STURDY SHELTER. MOVE TO AN INTERIOR ROOM AND STAY AWAY FROM WINDOWS. && LAT...LON 3271 8000 3259 8056 3290 8060 3298 8020 TIME...MOT...LOC 2259Z 355DEG 8KT 3288 8019 3278 8045 $$
092 WWUS52 KCHS 222315 SVSCHS SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE CHARLESTON SC 715 PM EDT MON AUG 22 2011 SCC019-029-035-222345- /O.CON.KCHS.SV.W.0252.000000T0000Z-110822T2345Z/ DORCHESTER SC-CHARLESTON SC-COLLETON SC- 715 PM EDT MON AUG 22 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT FOR EAST CENTRAL COLLETON...WEST CENTRAL CHARLESTON AND SOUTHEASTERN DORCHESTER COUNTIES... AT 715 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A LINE OF SEVERE THUNDERSTORMS. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM RED TOP TO JACKSONBORO...OR ALONG A LINE EXTENDING FROM MIDDLETON PLACE TO 17 MILES SOUTHEAST OF WALTERBORO... MOVING SOUTH AT 10 MPH. SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...ADAMS RUN...ASHEPOO...DELEMAR CROSSROADS...HOLLYWOOD...JACKSONBORO...JOHNS ISLAND...MEGGETT...RAVENEL...WADMALAW ISLAND AND YONGES ISLAND. PRECAUTIONARY/PREPAREDNESS ACTIONS... TO REPORT HAIL OR WIND DAMAGE...CONTACT THE CHARLESTON NATIONAL WEATHER SERVICE AT 1-888-383-2024 OR EMAIL YOUR REPORTS TO CHS.SKYWARN@NOAA.GOV. REPORTS CAN ALSO BE SENT THROUGH TWITTER USING #WXREPORT. && LAT...LON 3271 8000 3259 8056 3290 8060 3298 8020 TIME...MOT...LOC 2316Z 355DEG 8KT 3284 8019 3274 8045 $$
287 WWUS52 KCHS 222331 SVSCHS SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE CHARLESTON SC 731 PM EDT MON AUG 22 2011 SCC019-029-035-222345- /O.CON.KCHS.SV.W.0252.000000T0000Z-110822T2345Z/ DORCHESTER SC-CHARLESTON SC-COLLETON SC- 731 PM EDT MON AUG 22 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT FOR EAST CENTRAL COLLETON...WEST CENTRAL CHARLESTON AND SOUTHEASTERN DORCHESTER COUNTIES... AT 728 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A LINE OF SEVERE THUNDERSTORMS. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM RANTOWLES TO ADAMS RUN...OR ALONG A LINE EXTENDING FROM 7 MILES SOUTH OF MAGNOLIA GARDENS TO 14 MILES NORTH OF EDISTO BEACH...MOVING SOUTH AT 10 MPH. SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...ADAMS RUN...ASHEPOO...DELEMAR CROSSROADS...HOLLYWOOD...JACKSONBORO...JOHNS ISLAND...MEGGETT...RAVENEL...WADMALAW ISLAND AND YONGES ISLAND. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS THUNDERSTORM IS CAPABLE OF PRODUCING VERY HEAVY RAIN...WHICH MAY FLOOD ROADS...DITCHES AND LOW-LYING AREAS. AVOID FLOOD PRONE AREAS AND DO NOT DRIVE INTO PLACES WHERE WATER COVERS THE ROAD. && LAT...LON 3271 8000 3259 8056 3290 8060 3298 8020 TIME...MOT...LOC 2331Z 355DEG 8KT 3278 8013 3267 8039 $$
723 WWUS52 KCHS 222339 SVSCHS SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE CHARLESTON SC 739 PM EDT MON AUG 22 2011 SCC019-029-035-222348- /O.EXP.KCHS.SV.W.0252.000000T0000Z-110822T2345Z/ DORCHESTER SC-CHARLESTON SC-COLLETON SC- 739 PM EDT MON AUG 22 2011 ...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL COLLETON COUNTY WILL EXPIRE AT 745 PM EDT... AT 737 PM EDT...RADAR INDICATED THAT THE THUNDERSTORM WHICH PROMPTED THE WARNING HAD WEAKENED OVER COLLETON COUNTY...THUS THE SEVERE THUNDERSTORM WARNING HAS BEEN ALLOWED TO EXPIRE FOR THIS AREA. A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR PORTIONS OF DORCHESTER AND CHARLESTON COUNTIES UNTIL 815 PM EDT. TO REPORT HAIL OR WIND DAMAGE...CONTACT THE CHARLESTON NATIONAL WEATHER SERVICE AT 1-888-383-2024 OR EMAIL YOUR REPORTS TO CHS.SKYWARN@NOAA.GOV. REPORTS CAN ALSO BE SENT THROUGH TWITTER USING #WXREPORT. LAT...LON 3271 8000 3259 8056 3290 8060 3298 8020 TIME...MOT...LOC 2338Z 355DEG 8KT 3276 8013 3265 8039 $$
The office that day
Everything else NWS Charleston, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 22, 2:31 PM EDT | Special Weather Statement | CHS | Hampton | 29 min |
| Aug 22, 2:34 PM EDT | Special Weather Statement | CHS | Allendale | 26 min |
| Aug 22, 3:01 PM EDT | Special Weather Statement | CHS | Hampton | 29 min |
| Aug 22, 3:04 PM EDT | Special Weather Statement | CHS | Charleston | 26 min |
| Aug 22, 3:11 PM EDT | Severe Thunderstorm Warning | CHS | Allendale, Hampton, Jasper | 64 min |
| Aug 22, 3:24 PM EDT | Areal Flood Advisory | CHS | Charleston | 66 min |
| Aug 22, 3:39 PM EDT | Special Weather Statement | CHS | Charleston | 36 min |
| Aug 22, 3:42 PM EDT | Severe Thunderstorm Warning | CHS | Charleston | 48 min |
| Aug 22, 4:02 PM EDT | Severe Thunderstorm Warning | CHS | Beaufort, Hampton, Jasper | 58 min |
| Aug 22, 4:17 PM EDT | Special Weather Statement | CHS | Dorchester | 28 min |
| Aug 22, 4:29 PM EDT | Special Weather Statement | CHS | Charleston | 31 min |
| Aug 22, 5:00 PM EDT | Severe Thunderstorm Warning | CHS | Beaufort, Colleton | 45 min |
| Aug 22, 5:20 PM EDT | Special Weather Statement | CHS | Hampton | 25 min |
| Aug 22, 5:21 PM EDT | Severe Thunderstorm Warning | CHS | Beaufort, Jasper | 54 min |
| Aug 22, 5:32 PM EDT | Severe Thunderstorm Warning | CHS | Colleton, Dorchester | 58 min |
| Aug 22, 5:52 PM EDT | Special Weather Statement | CHS | Berkeley | 38 min |
| Aug 22, 6:46 PM EDT | Special Weather Statement | CHS | Charleston | 29 min |
| Aug 22, 7:21 PM EDT | Severe Thunderstorm Warning | CHS | Berkeley, Charleston, Dorchester | 54 min |
| Aug 22, 7:33 PM EDT | Special Weather Statement | CHS | Hampton | 42 min |
Nearby
Severe Thunderstorm Warnings in South Carolina, 2011Every severe thunderstorm warning in 2011
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.