Alert archive / South Carolina / Flash Flood Warnings in 1990
Flash Flood Warning 2, NWS Columbia, SC
NWS Columbia, SC issued this flash flood warning at Oct 10, 1990, 6:50 PM EDT for Calhoun County, South Carolina. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Oct 10, 1990, 6:50 PM EDT (22:50 UTC)
- Expired
- Oct 10, 1990, 9:45 PM EDT
- In force
- 3 hr
- Issued by
- NWS Columbia, SC
- Area
- Whole counties
County Calhoun 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, 10.8 hours before the alert went out and 113 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
- 825 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 558 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 168 m²/s²
- 0-3 km storm-relative helicity
- 188 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 7.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCAE 102252 FFWCAE SCC017-110145- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE COLUMBIA SC 650 PM EDT WED OCT 10 1990 THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 945 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH CAROLINA ...CALHOUN COUNTY AT 645 PM EDT A WEATHER SPOTTER IN CALHOUN COUNTY NEAR ST MATTHEWS REPORTED 6.18 INCHES OF RAIN DURING THE PAST 6 HOURS. THE THUNDERSTORMS OVER ORANGEBURG COUNTY WILL BE MOVING INTO CALHOUN COUNTY DURING THE NEXT HOUR. THESE THUNDERSTORMS WILL PRODUCE AN ADDITIONAL 2 TO 4 INCHES OF RAIN DURING THE NEXT FEW HOURS. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED...ACT QUICKLY. MOVE UP TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. 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.
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Oct 10, 5:52 PM EDT, 58 minutes before
SCZ003-004-005-006-102200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE COLUMBIA SC 545 PM EDT THU OCT 4 1990 ...STRONG THUNDERSTORMS CONTINUE OVER THE MIDLANDS OF SOUTH CAROLINA... AT 530 PM EDT RADAR INDICATED AN AREA OF THUNDERSTORMS...SOME PRODUCING VERY HEAVY RAIN OVER THE SOUTH MIDLANDS. THE STRONGEST THUNDERSTORMS WERE LOCATED IN BAMBERG...ORANGEBURG...CALHOUN AND SUMTER COUNTIES. THESE THUNDERSTORMS WERE MOVING TO THE NORTH AT 20 MPH. THESE THUNDERSTORMS WILL PRODUCE VERY HEAVY RAIN...FREQUENT LIGHTNING AND GUSTY WINDS AS THEY PASS. RAINFALL AMOUNTS OF 2 TO 4 INCHES ARE POSSIBLE IN 3 HOURS ARE POSSIBLE AND WILL CAUSE FLOODING OF ROADS ...UNDERPASSES AND LOW LYING AREAS. Y THESE THUNDERSTORMS WILL BE MOVING INTO EASTERN RICHLAND...SUMTER...LEE ...KERSHAW AND LANCASTER COUNTIES DURING THE NEXT FEW HOURS. ELSEWHERE ACROSS THE PIEDMONTS AND MIDLANDS OF SOUTH CAROLINA LIGHT RAIN WAS OCCURRING. CDL
Special weather statement, Oct 10, 5:55 PM EDT, 55 minutes before
SCZ003-004-005-006-102200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE COLUMBIA SC 545 PM EDT THU OCT 4 1990 ...STRONG THUNDERSTORMS CONTINUE OVER THE MIDLANDS OF SOUTH CAROLINA... AT 530 PM EDT RADAR INDICATED AN AREA OF THUNDERSTORMS...SOME PRODUCING VERY HEAVY RAIN OVER THE SOUTH MIDLANDS. THE STRONGEST THUNDERSTORMS WERE LOCATED IN BAMBERG...ORANGEBURG...CALHOUN AND SUMTER COUNTIES. THESE THUNDERSTORMS WERE MOVING TO THE NORTH AT 20 MPH. THESE THUNDERSTORMS WILL PRODUCE VERY HEAVY RAIN...FREQUENT LIGHTNING AND GUSTY WINDS AS THEY PASS. RAINFALL AMOUNTS OF 2 TO 4 INCHES ARE POSSIBLE IN 3 HOURS AND WILL CAUSE FLOODING OF ROADS...UNDERPASSES AND LOW LYING AREAS. THESE THUNDERST\ORMS WILL BE MOVING INTO EASTERN RICHLAND...SUMTER...LEE ...KERSHAW AND LANCASTER COUNTIES DURING THE NEXT FEW HOURS. ELSEWHERE ACROSS THE PIEDMONTS AND MIDLANDS OF SOUTH CAROLINA LIGHT RAIN WAS OCCURRING. CDL
Special weather statement, Oct 10, 6:04 PM EDT, 46 minutes before
SCZ003-004-005-006-102200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE COLUMBIA SC 602 PM EDT WED OCT 10 1990 ...STRONG THUNDERSTORMS CONTINUE OVER THE MIDLANDS OF SOUTH CAROLINA... AT 530 PM EDT RADAR INDICATED AN AREA OF THUNDERSTORMS...SOME PRODUCING VERY HEAVY RAIN OVER THE SOUTH MIDLANDS. THE STRONGEST THUNDERSTORMS WERE LOCATED IN BAMBERG...ORANGEBURG...CALHOUN AND SUMTER COUNTIES. THESE THUNDERSTORMS WERE MOVING TO THE NORTH AT 20 MPH. THESE THUNDERSTORMS WILL PRODUCE VERY HEAVY RAIN...FREQUENT LIGHTNING AND GUSTY WINDS AS THEY PASS. RAINFALL AMOUNTS OF 2 TO 4 INCHES ARE POSSIBLE IN 3 HOURS AND WILL CAUSE FLOODING OF ROADS...UNDERPASSES AND LOW LYING AREAS. THESE THUNbDERSTORMS WILL BE MOVING INTO EASTERN RICHLAND...SUMTER...LEE ...KERSHAW AND LANCASTER COUNTIES DURING THE NEXT FEW HOURS. ELSEWHERE ACROSS THE PIEDMONTS AND MIDLANDS OF SOUTH CAROLINA LIGHT RAIN WAS OCCURRING. CDL
The office that day
Everything else NWS Columbia, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 10, 6:08 PM EDT | Flash Flood Warning | CAE | Orangeburg | 3 hr |
| Oct 10, 7:31 PM EDT | Flash Flood Warning | CAE | Richland, Sumter | 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.