Alert archive / South Carolina / Flash Flood Watches in 2015
Flash Flood Watch 1, NWS Charleston, SC
NWS Charleston, SC issued this flash flood watch at Sep 24, 2015, 11:01 PM EDT for Berkeley County, Colleton County, Dorchester County, South Carolina. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Sep 24, 2015, 11:01 PM EDT (03:01 UTC)
- Expired
- Sep 25, 2015, 3:41 AM EDT
- In force
- 5 hr
- Issued by
- NWS Charleston, SC
- Flood severity
- None
Counties Berkeley County, SC, Colleton County, SC, Dorchester County, SC
The radar
The Charleston,SC radar (KCLX), 79 km from the middle of the area, began a volume at 03:04 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 00:00Z, 3.0 hours before the alert went out and 35 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
- 449 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 655 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 193 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.5
What forecasters said that day
The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Charleston, SC wrote its last area forecast discussion before this flash flood watch went out at Sep 24, 9:40 PM EDT, 1 hour 21 minutes earlier.
Area forecast discussion, Sep 24, 9:40 PM EDT, 1 hour 21 minutes before
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</html>Hazardous weather outlook, Sep 24, 9:49 PM EDT, 1 hour 12 minutes before
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</html>In the hours before
Local storm report, Sep 24, 7:58 PM EDT, 3 hours 3 minutes before
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</html>Local storm report, Sep 24, 8:09 PM EDT, 2 hours 52 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
809 PM EDT THU SEP 24 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0803 PM HIGH ASTR TIDES 1 SE CHARLESTON 32.77N 79.92W
09/24/2015 CHARLESTON SC PILOT BOAT
STANDING SALT WATER WAS REPORTED IN THE VICINITY OF THE
CHARLESTON BRANCH PILOTS ASSOCIATION OFFICE.
&&
EVENT NUMBER CHS1501034
SPRSpecial weather statement, Sep 24, 8:49 PM EDT, 2 hours 12 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
849 PM EDT THU SEP 24 2015
SCZ049-050-250115-
CHARLESTON SC-COASTAL COLLETON SC-
849 PM EDT THU SEP 24 2015
...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF COLLETON COUNTY UNTIL
915 PM EDT...
AT 849 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER
EDISTO BEACH...MOVING NORTHWEST AT 15 MPH.
WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM.
LOCATIONS IMPACTED INCLUDE...
EDISTO BEACH AND BENNETTS POINT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLOODING OF LOW LYING AND POOR DRAINAGE AREAS. DO NOT DRIVE YOUR
VEHICLE THROUGH FLOODED ROADWAYS.
&&
LAT...LON 3248 8033 3250 8037 3247 8041 3250 8043
3250 8049 3255 8053 3262 8043 3261 8041
3255 8041 3249 8033 3253 8035 3251 8029
TIME...MOT...LOC 0049Z 120DEG 11KT 3247 8034Local storm report, Sep 24, 9:03 PM EDT, 1 hour 58 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE CHARLESTON SC
903 PM EDT THU SEP 24 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0503 PM HIGH ASTR TIDES 1 N CHARLESTON 32.80N 79.94W
09/24/2015 CHARLESTON SC SOCIAL MEDIA
RECEIVED AN IMAGE VIA SOCIAL MEDIA OF STANDING SALT
WATER AT THE INTERSECTION OF EAST BAY AND LEE STREETS.
0524 PM HIGH ASTR TIDES 3 WNW FORT SCREVEN 32.03N 80.90W
09/24/2015 CHATHAM GA TIDE GAGE
THE EVENING HIGH TIDE PEAKED AT 9.05 FEET MEAN LOWER
LOW WATER AT FORT PULASKI. SHALLOW SALT WATER FLOODING
TYPICALLY BEGINS AT 9.2 FT MLLW.
0536 PM HIGH ASTR TIDES 1 E CHARLESTON 32.78N 79.93W
09/24/2015 CHARLESTON SC TIDE GAGE
THE HIGH TIDE ON CHARLESTON HARBOR PEAKED AT 7.55 FEET
MEAN LOWER LOW WATER. SHALLOW SALT WATER FLOODING
TYPICALLY BEGINS AT 7 FT MLLW.
0600 PM HIGH ASTR TIDES 1 N CHARLESTON 32.80N 79.94W
09/24/2015 CHARLESTON SC BROADCAST MEDIA
BROADCAST MEDIA REPORTING STANDING WATER AND A FEW
STALLED VEHICLES ALONG EAST BAY STREET AND MORRISON
DRIVE.
0635 PM HIGH ASTR TIDES 1 N CHARLESTON 32.80N 79.94W
09/24/2015 CHARLESTON SC LAW ENFORCEMENT
CHARLESTON POLICE REPORTED SALT WATER FLOODING ON
MORRISON DRIVE AND EAST BAY STREET BETWEEN HARRIS AND
LEE STREETS.
0727 PM HIGH ASTR TIDES 1 N CHARLESTON 32.80N 79.94W
09/24/2015 CHARLESTON SC LAW ENFORCEMENT
CHARLESTON POLICE DEPARTMENT REPORTED THAT AMERICA
STREET BETWEEN LEE AND COOPER STREETS WAS CLOSED DUE TO
TIDAL FLOODING.
0730 PM HIGH ASTR TIDES 1 WNW CHARLESTON 32.79N 79.95W
09/24/2015 CHARLESTON SC LAW ENFORCEMENT
CHARLESTON POLICE DEPARTMENT REPORTED THAT HAGOOD
AVENUE BETWEEN LINE AND ALLWAY STREETS WAS CLOSED DUE TO
TIDAL FLOODING. REPORT WAS RELAYED BY BROADCAST MEDIA
VIA SOCIAL MEDIA.
0750 PM HIGH ASTR TIDES 1 SW CHARLESTON 32.78N 79.94W
09/24/2015 CHARLESTON SC LAW ENFORCEMENT
CHARLESTON POLICE REPORTED THAT THE INTERSECTION OF
BARRE AND WENTWORTH STREETS WAS CLOSED DUE TO TIDAL
FLOODING. REPORT WAS RELAYED VIA SOCIAL MEDIA.
0803 PM HIGH ASTR TIDES 1 SE CHARLESTON 32.77N 79.92W
09/24/2015 CHARLESTON SC PILOT BOAT
STANDING SALT WATER WAS REPORTED IN THE VICINITY OF THE
CHARLESTON BRANCH PILOTS ASSOCIATION OFFICE.
&&
EVENT NUMBER CHS1501026 CHS1501029 CHS1501028 CHS1501027 CHS1501030
CHS1501031 CHS1501032 CHS1501033 CHS1501034
SPRSpecial weather statement, Sep 24, 10:17 PM EDT, 44 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHARLESTON SC 1017 PM EDT THU SEP 24 2015 SCZ049-050-250245- CHARLESTON SC-COASTAL COLLETON SC- 1017 PM EDT THU SEP 24 2015 ...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF UNTIL 1045 PM EDT... AT 1016 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM JUST OFFSHORE OF EDISTO BEACH...MOVING WEST AT 15 MPH. WINDS IN EXCESS OF 40 MPH AND FUNNEL CLOUDS WILL BE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... EDISTO BEACH. THIS STORM MAY INTENSIFY AND HAS SHOWN SOME ROTATION. BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. LAT...LON 3250 8029 3251 8033 3255 8028 3254 8022 TIME...MOT...LOC 0216Z 101DEG 13KT 3252 8020
Special weather statement, Sep 24, 10:18 PM EDT, 43 minutes before
SPECIAL WEATHER STATEMENT...CORRECTED NATIONAL WEATHER SERVICE CHARLESTON SC 1018 PM EDT THU SEP 24 2015 SCZ049-050-250245- CHARLESTON SC-COASTAL COLLETON SC- 1018 PM EDT THU SEP 24 2015 ...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF COLLETON AND CHARLESTON COUNTIES UNTIL 1045 PM EDT... AT 1016 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM JUST OFFSHORE OF EDISTO BEACH...MOVING WEST AT 15 MPH. WINDS IN EXCESS OF 40 MPH AND FUNNEL CLOUDS WILL BE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... EDISTO BEACH. THIS STORM MAY INTENSIFY AND HAS SHOWN SOME ROTATION. BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. LAT...LON 3250 8029 3251 8033 3255 8028 3254 8022 TIME...MOT...LOC 0216Z 101DEG 13KT 3252 8020
The office that day
Everything else NWS Charleston, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 24, 8:49 PM EDT | Special Weather Statement | CHS | Beaufort | 26 min |
| Sep 24, 9:45 PM EDT | Areal Flood Advisory | CHS | Charleston, Colleton | 60 min |
| Sep 24, 10:14 PM EDT | Special Marine Warning | CHS | 31 min | |
| Sep 24, 10:17 PM EDT | Special Weather Statement | CHS | Beaufort | 28 min |
| Sep 24, 10:18 PM EDT | Special Weather Statement | CHS | Beaufort | 27 min |
| Sep 24, 10:35 PM EDT | Special Marine Warning | CHS | 115 min | |
| Sep 24, 10:44 PM EDT | Areal Flood Advisory | CHS | Charleston, Colleton | 2 hr |
| Sep 24, 11:34 PM EDT | Areal Flood Advisory | CHS | Beaufort | 86 min |
| Sep 25, 12:24 AM EDT | Areal Flood Advisory | CHS | Charleston, Colleton, Dorchester | 96 min |
| Sep 25, 12:37 AM EDT | Severe Thunderstorm Warning | CHS | Charleston | 53 min |
| Sep 25, 12:38 AM EDT | Tornado Warning | CHS | Charleston | 37 min |
| Sep 25, 12:45 AM EDT | Tornado Warning | CHS | Berkeley, Charleston, Dorchester | 45 min |
| Sep 25, 1:38 AM EDT | Special Weather Statement | CHS | Charleston | 37 min |
| Sep 25, 1:50 AM EDT | Severe Thunderstorm Warning | CHS | Berkeley, Charleston, Dorchester | 25 min |
| Sep 25, 2:11 AM EDT | Areal Flood Advisory | CHS | Berkeley, Charleston, Colleton, Dorchester | 94 min |
| Sep 25, 3:45 AM EDT | Coastal Flood Advisory | CHS | 3 hr | |
| Sep 25, 10:57 AM EDT | Coastal Flood Advisory | CHS | 10 hr |
Nearby
Flash Flood Watches in South Carolina, 2015Every flash flood watch in 2015
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.