Alert archive / South Carolina / Flash Flood Warnings in 1990
Flash Flood Warning 9, NWS Columbia, SC
NWS Columbia, SC issued this flash flood warning at Oct 11, 1990, 1:07 PM EDT for Calhoun County, Richland County, South Carolina. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Oct 11, 1990, 1:07 PM EDT (17:07 UTC)
- Expired
- Oct 11, 1990, 4:15 PM EDT
- In force
- 3 hr
- Issued by
- NWS Columbia, SC
- Area
- Whole counties
Counties Calhoun County, SC, Richland County, SC
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Charleston AFB, SC (KCHS), launched 12:00Z, 5.1 hours before the alert went out and 131 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
- 38 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 640 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- -26 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCAE 111708 FFWCAE SCC017-079-112015- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE COLUMBIA SC 107 PM EDT THU OCT 11 1990 THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 415 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTH CAROLINA ...CALHOUN COUNTY...RICHLAND COUNTY RAIN AND HEAVY THUNDERSTORMS ARE INCREASING AGAIN OVER THE MIDLANDS OF SOUTH CAROLINA..ESPECIALLY OVER PORTIONS OF RICHLAND AND CALHOUN COUNTIES. EARLIER RAINS LAST NIGHT CAUSED SOME BRIDGE AND ROAD FAILURES..SO THE COUNTY IS HIGHLY VULNERABLE TO ADDITIONAL FLASH FLOOD DAMAGE AND MANY ROADS REMAIN CLOSED IN CALHOUN COUNTY. A FLASH FLOOD WARNING CONTINUES IN EFFECT FOR CLARENDON COUNTY..KERSHAW COUNTY..LEE COUNTY..AND SUMTER COUNTY UNTIL 245 PM EDT. THE FLOODING POTENTIAL REMAINS HIGH FOR MOST OF EASTERN SOUTH CAROLINA..AND WITH THE EXPECTED ADDITIONAL RAINS IN ADVANCE OF TROPICIAL STORM MARCO..THE WESTERN PARTS OF THE STATE WILL SOON BECOME HIGHLY VULNERABLE TO FLASH FLOODS ALSO. ALL INTERESTS SHOULD KEEP POSTED ON THESE SIGNIFICANT FLOODING THREATS. PALMER DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO HIGHER GROUND. A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.
The office that day
Everything else NWS Columbia, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 10, 9:45 PM EDT | Flash Flood Warning | CAE | Bamberg, Orangeburg | 6 hr |
| Oct 10, 9:45 PM EDT | Flash Flood Warning | CAE | Kershaw, Lancaster, Richland, Sumter | 6 hr |
| Oct 10, 9:45 PM EDT | Flash Flood Warning | CAE | Calhoun | 6 hr |
| Oct 11, 11:41 AM EDT | Flash Flood Warning | CAE | Kershaw, Lee, Sumter | 3 hr |
| Oct 11, 11:41 AM EDT | Flash Flood Warning | CAE | Clarendon | 3 hr |
| Oct 11, 2:22 PM EDT | Flash Flood Warning | CAE | Clarendon, Kershaw, Lee, Sumter | 4 hr |
| Oct 11, 2:22 PM EDT | Flash Flood Warning | CAE | Lancaster | 4 hr |
| Oct 11, 3:43 PM EDT | Flash Flood Warning | CAE | Calhoun, Richland | 3 hr |
Nearby
Flash Flood Warnings in South Carolina, 1990Every flash flood warning in 1990
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.