Alert archive / South Carolina / Flash Flood Warnings in 2015
Flash Flood Warning 13, NWS Charleston, SC
NWS Charleston, SC issued this flash flood warning at Oct 1, 2015, 1:39 PM EDT for Charleston County, South Carolina. It was in force for 6 hr. 9 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Oct 1, 2015, 1:39 PM EDT (17:39 UTC)
- Expired
- Oct 1, 2015, 7:30 PM EDT
- In force
- 6 hr
- Issued by
- NWS Charleston, SC
- Area
- Storm-based polygon
- Flood severity
- None
County Charleston County, SC
The radar
The Charleston,SC radar (KCLX), 104 km from the middle of the area, began a volume at 17:42 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 |
|---|---|---|---|
| Oct 1, 1:54 PM EDT | FLASH FLOOD | 1 N Charleston, SC | LAW ENFORCEMENT REPORTS NASSAU ST AT COOPER ST CLOSED DUE TO WATER COVERING THE ROADWAY. |
| Oct 1, 1:54 PM EDT | FLASH FLOOD | 1 Wnw Charleston, SC | LAW ENFORCEMENT REPORTS HAGOOD AVE AT FISHBURNE ST CLOSED DUE TO WATER COVERING THE ROADWAY. |
| Oct 1, 1:54 PM EDT | FLASH FLOOD | 1 Wnw Charleston, SC | LAW ENFORCEMENT REPORTS LINE ST AT HAGOOD AVE CLOSED DUE TO WATER COVERING THE ROADWAY. |
| Oct 1, 2:22 PM EDT | FLASH FLOOD | 1 Nnw Charleston, SC | LAW ENFORCEMENT REPORTS CROSSTOWN EXPRESSWAY CLOSED DUE TO WATER COVERING THE ROADWAY. |
| Oct 1, 2:25 PM EDT | FLASH FLOOD | 1 Wnw Charleston, SC | LAW ENFORCEMENT REPORTS PRESIDENT ST AT CANNON ST CLOSED DUE TO WATER COVERING THE ROADWAY. |
| Oct 1, 2:44 PM EDT | FLASH FLOOD | Charleston, SC | LAW ENFORCEMENT REPORTS S MARKET ST CLOSED AT MEETING ST DUE TO WATER COVERING THE ROADWAY. |
| Oct 1, 4:30 PM EDT | HEAVY RAIN 2.11 | Charleston, SC | NEW DAILY RAINFALL RECORD FOR DOWNTOWN CHARLESTON SC. |
| Oct 1, 4:35 PM EDT | HEAVY RAIN 2.45 | 2 E Charles Towne Landi, SC | |
| Oct 1, 4:45 PM EDT | HEAVY RAIN 2.89 | 1 Wnw Charleston, SC | RAIN BEGAN AT 1245 PM |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Charleston AFB, SC (KCHS), launched 12:00Z, 5.7 hours before the alert went out and 13 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
- 594 J/kg
- Mixed-layer CIN
- -25 J/kg
- Mixed-layer LCL
- 646 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 30 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
491
WGUS52 KCHS 011739
FFWCHS
SCC019-012330-
/O.NEW.KCHS.FF.W.0013.151001T1739Z-151001T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
139 PM EDT THU OCT 1 2015
THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A
* FLASH FLOOD WARNING FOR PORTIONS OF...
CHARLESTON COUNTY IN SOUTHEASTERN SOUTH CAROLINA...
* UNTIL 730 PM EDT
* AT 136 PM EDT...DOPPLER RADAR INDICATED TORRENTIAL RAINFALL
CONTINUING TO MOVE ACROSS DOWNTOWN CHARLESTON AND THE CHARLESTON
NECK. RAIN GAGES INDICATE AS MUCH AS 2 INCHES OF RAIN HAS ALREADY
OCCURRED ACROSS PORTIONS OF DOWNTOWN. WITH THE TIDES CONTINUING TO
RUN HIGHER THAN NORMAL...RAINFALL WILL BE VERY SLOW TO DRAIN.
NUMEROUS STREETS ARE EXPECTED TO FLOOD OR ALREADY FLOODING AS A
RESULT OF THIS HEAVY RAINFALL. MOTORISTS ARE URGED NOT TO VENTURE
INTO DOWNTOWN CHARLESTON UNLESS ABSOLUTELY NECESSARY. ADDITIONAL
ROAD FLOODING IS LIKELY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF ROAD FLOODING IS ENCOUNTERED...FIND AN ALTERNATE ROUTE. ONLY ONE
FOOT OF WATER IS ENOUGH TO STALL A VEHICLE AND TWO FEET WILL CAUSE
ONE TO FLOAT.
&&
LAT...LON 3277 7992 3277 7995 3279 7997 3282 7996
3284 7998 3285 7994 3282 7993 3280 7993
3278 7992 3278 7991
$$
JRL3 follow-up statements
988
WGUS72 KCHS 011855
FFSCHS
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
255 PM EDT THU OCT 1 2015
SCC019-012330-
/O.CON.KCHS.FF.W.0013.000000T0000Z-151001T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHARLESTON SC-
255 PM EDT THU OCT 1 2015
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM EDT FOR
CENTRAL CHARLESTON COUNTY...
AT 244 PM EDT...DOPPLER RADAR INDICATED THE HEAVIEST RAINFALL HAS
SHIFTED OUT OF DOWNTOWN CHARLESTON. HOWEVER...ADDITIONAL MODERATE TO
HEAVY RAIN IS BEGINNING TO MOVE BACK INTO THE CHARLESTON AREA.
EXISTING FLOODING ISSUES MAY NOT WORSEN...BUT ARE LIKELY TO CONTINUE
THROUGH MID TO LATE AFTERNOON DUE TO ABOVE NORMAL TIDES AND
SIGNIFICANT ACCUMULATED WATER FROM EARLIER RAIN.
MOTORISTS ARE URGED TO AVOID DRIVING IN DOWNTOWN CHARLESTON UNLESS
ABSOLUTELY NECESSARY. NUMEROUS ROADS REMAIN CLOSED OR
IMPASSABLE INCLUDING PRIMARY ARTERIES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF ROAD FLOODING IS ENCOUNTERED...FIND AN ALTERNATE ROUTE. ONLY ONE
FOOT OF WATER IS ENOUGH TO STALL A VEHICLE AND TWO FEET WILL CAUSE
ONE TO FLOAT.
LAT...LON 3277 7992 3277 7995 3279 7997 3282 7996
3284 7998 3285 7994 3282 7993 3280 7993
3278 7992 3278 7991
$$
JRL816
WGUS72 KCHS 012058
FFSCHS
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
458 PM EDT THU OCT 1 2015
SCC019-012330-
/O.CON.KCHS.FF.W.0013.000000T0000Z-151001T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHARLESTON SC-
458 PM EDT THU OCT 1 2015
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM EDT FOR
CHARLESTON COUNTY...
AT 453 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED AN
AREA OF LIGHT TO MODERATE RAIN CONTINUING OVER DOWNTOWN CHARLESTON.
AS TIDE LEVELS HAVE CONTINUED TO FALL AND MOST OF THE RECENT
RAINFALL HAS NOT BEEN HEAVY...ROAD CONDITIONS APPEAR TO BE
IMPROVING. THE LATEST REPORTS SHOW THAT THE CROSSTOWN EXPRESSWAY HAS
BEEN REOPENED AND OTHER STREETS ARE SHOWING SIGNS OF IMPROVEMENT.
ADDITIONAL RAINFALL CONTINUES TO MOVE ONSHORE HOWEVER IT IS UNCLEAR
WHETHER THE RAINFALL WILL BECOME HEAVY OVER DOWNTOWN CHARLESTON.
RESIDENTS AND VISITORS ARE URGED TO CONTINUE TO AVOID TRAVEL IN
DOWNTOWN CHARLESTON IF AT ALL POSSIBLE. NUMEROUS STREETS ARE STILL
FLOODED AND MANY ROUTES REMAIN CUT OFF.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF ROAD FLOODING IS ENCOUNTERED...FIND AN ALTERNATE ROUTE. ONLY ONE
FOOT OF WATER IS ENOUGH TO STALL A VEHICLE AND TWO FEET WILL CAUSE
ONE TO FLOAT.
LAT...LON 3277 7992 3277 7995 3279 7997 3282 7996
3284 7998 3285 7994 3282 7993 3280 7993
3278 7992 3278 7991
$$
JRL461
WGUS72 KCHS 012325
FFSCHS
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
725 PM EDT THU OCT 1 2015
SCC019-012330-
/O.EXP.KCHS.FF.W.0013.000000T0000Z-151001T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHARLESTON SC-
725 PM EDT THU OCT 1 2015
...THE FLASH FLOOD WARNING FOR CHARLESTON COUNTY WILL EXPIRE AT 730
PM EDT...
THE HEAVIEST RAINFALL HAS MOVED OUT OF DOWNTOWN CHARLESTON AND LOW
TIDE OCCURRED AT 530 PM. SOME STREETS REMAIN CLOSED DUE TO FLOODING
IN DOWNTOWN CHARLESTON...HOWEVER ADDITIONAL ROAD CLOSURES ARE NOT
ANTICIPATED THROUGH 9 PM. ADDITIONAL HEAVY RAINFALL MAY MOVE INTO
THE AREA LATER THIS EVENING OR OVERNIGHT...COINCIDENT WITH ANOTHER
ABOVE NORMAL HIGH TIDE. IN THIS EVENT...ANOTHER FLASH FLOOD WARNING
MAY BE REQUIRED.
ALTHOUGH THE HEAVY RAINFALL HAS TEMPORARILY ENDED...CONDITIONS WILL
LIKELY REMAIN TREACHEROUS FOR MOTORISTS THROUGH TONIGHT. PEOPLE ARE
URGED TO AVOID UNNECESSARY TRAVEL IN DOWNTOWN CHARLESTON TONIGHT.
LAT...LON 3277 7992 3277 7995 3279 7997 3282 7996
3284 7998 3285 7994 3282 7993 3280 7993
3278 7992 3278 7991
$$
JRLThe office that day
Everything else NWS Charleston, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 30, 9:43 PM EDT | Coastal Flood Watch | CHS | 9 hr | |
| Oct 1, 12:33 AM EDT | Small Craft Advisory | CHS | 7 days | |
| Oct 1, 4:15 AM EDT | Flash Flood Watch | CHS | Allendale, Berkeley, Colleton, Dorchester, Hampton | 5 days |
| Oct 1, 4:32 AM EDT | Coastal Flood Advisory | CHS | 8 hr | |
| Oct 1, 12:45 PM EDT | Areal Flood Advisory | CHS | Charleston | 60 min |
| Oct 1, 2:02 PM EDT | Areal Flood Advisory | CHS | Beaufort | 58 min |
| Oct 1, 3:11 PM EDT | Areal Flood Advisory | CHS | Beaufort | 94 min |
| Oct 1, 4:09 PM EDT | Coastal Flood Advisory | CHS | 10 hr | |
| Oct 1, 4:09 PM EDT | Rip Current Statement | CHS | 3 days |
Nearby
Flash Flood Warnings in South Carolina, 2015Every flash flood warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.