Alert archive / Mississippi / Flash Flood Warnings in 1991
Flash Flood Warning 13, NWS Memphis, TN
NWS Memphis, TN issued this flash flood warning at Apr 28, 1991, 5:42 AM CDT for Coahoma County, Mississippi. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Apr 28, 1991, 5:42 AM CDT (10:42 UTC)
- Expired
- Apr 28, 1991, 10:00 AM CDT
- In force
- 4 hr
- Issued by
- NWS Memphis, TN
- Area
- Whole counties
County Coahoma County, MS
The nearest sounding before it
Jackson, MS (KJAN), launched 00:00Z, 10.7 hours before the alert went out and 218 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
- 3219 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 595 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 112 m²/s²
- 0-3 km storm-relative helicity
- 135 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMEM 281045 FFWMEM MSC027-281500- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE MEMPHIS TN 542 AM CDT SUN APR 28 1991 THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 1000 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN NORTHWEST MISSISSIPPI ...COAHOMA COUNTY CONTINUOUS RAINS OVER COAHOMA COUNTY MISSISSIPPI THIS MORNING HAVE CAUSED FLOODING OF SEVERAL ROADS IN AND AROUND CLARKSDALE. ESTIMATES OF RAINFALL ACROSS COAHOMA COUNTY FROM RADAR INDICATE AROUND THREE INCHES HAVE FALLEN IN THE PAST FEW HOURS. WITH RAIN EXPECTED TO CONTINUE FOR AT LEAST ANOTHER 4 HOURS... ADDITIONAL ACCUMULATIONS WILL QUICKLY BECOME RUNOFF TO STREAMS AND CREEKS. 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. MOST DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES OR LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT.
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, Apr 28, 12:07 AM CDT, 5 hours 35 minutes before
MSZ004-005-007-280615- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TUPELO MS 1207 AM CDT SUN APR 28 1991 ...SEVERE THUNDERSTORM WATCH NUMBER 212 REMAINS IN EFFECT UNTIL 2 AM CDT FOR MOST OF CENTRAL MISSISSIPPI... AT 1200 MIDNIGHT CDT...NATIONAL WEATHER SERVICE RADAR CONTINUED TO SHOW A LARGE AREA OF SHOWERS AND THUNDERSTORM MOVING INTO NORTHEAST MISSISSIPPI. THE STRONGEST THUNDERSTORMS REACHED FROM RIPLEY SOUTH TO NEAR WEST POINT [AND WAS MOVING TO THE NORTHEAST AT 35 MILES AN HOUR. THESE THUNDERSTORMS WERE CAPABLE OF PRODUCING SMALL HAIL...LOCALLY HEAVY RAINS...AND GUSTY SURFACE WINDS. STAY TUNED FOR LATER STATEMENTS OR POSSIBLE WARNINGS. NNNN
Special weather statement, Apr 28, 1:56 AM CDT, 3 hours 46 minutes before
MSZ004-005-007-280800- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TUPELO MS 156 AM CDT SUN APR 28 1991 ...SEVERE THUNDERSTORM WATCH NUMBER 212 HAS BEEN REPLACED WITH TORNADO WATCH NUMBER 216 EFFECTIVE UNTIL 7 AM CDT FOR PARTS OF WESTERN AND NORTHERN MISSISSIPPI... AT 145 AM CDT...NATIONAL WEATHER SERVICE RADAR IN TUPELO SHOWED A LARGE AREA OF SHOWERS AND SCATTERED STRONG THUNDERSTORMS ACROSS SOUTHWEST TENNESSEE...WESTERN ALABAMA...EASTERN ARKANSAS AND NORTHERN MISSISSIPPI MOVING TO THE NORTHEAST AT 35 MILES AN HOUR. ANOTHER LARGE AREA OF THUNDERSTORMS HAD REDEVELOPED ACROSS SOUTHERN ARKANSAS AND NORTHERN LOUISIANA WHICH WILL BE MOVING INTO NORTHERN SECTIONS OF THE STATE LATER THIS MORNING. NNNN
Local storm report, Apr 28, 2:26 AM CDT, 3 hours 16 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUPELO MS
230 AM CDT SUN APR 28 1991
TIME OF OCCURRENCE REPORT
1245 AM CDT...OKOLONA PD REPORTED A FEW LARGE TREES BLOWN DOWN
, AND DIME SIZE HAIL IN OKOLONA. (CHICKASAW COUNTY)Special weather statement, Apr 28, 3:04 AM CDT, 2 hours 38 minutes before
MSZ004-005-007-280900- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TUPELO MS 304 AM CDT SUN APR 28 1991 ...TORNADO WATCH NUMBER 216 IN EFFECT UNTIL 7 AM CDT FOR PARTS OF WESTERN AND NORTHERN MISSISSIPPI... AT 255 AM CDT...NATIONAL WEATHER SERVICE RADAR IN TUPELO SHOWED A LARGE AREA OF SHOWERS AND SCATTERED STRONG THUNDERSTORMS EXTENDING FROM CENTRAL TENNESSEE ACROSS NORTHERN MISSISSIPPI AND ALABAMA INTO EASTERN ARKANSAS. THE STRONGEST STORMS IN NORTHERN MISSISSIPPI REACHED FROM HOLLY SPRINGS SOUTHWEST TO CHARLESTON AND WERE MOVING TO THE NORTHEAST AT 40 MILES AN HOUR. NO SEVERE WEATHER HAS BEEN REPORTED TO THIS OFFICE DURING THE PAST HOUR...HOWEVER THESE THUNDERSTORMS ARFE CAPABLE OF PRODUCING LOCALLY HEAVY RAINS...FREQUENT CLOUD TO GROUND LIGHTING...SMALL HAIL AND WIND GUSTS OF 35 TO 45 MILES AN HOUR. NNNN
Special weather statement, Apr 28, 3:51 AM CDT, 1 hour 51 minutes before
MSZ004-005-007-281000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TUPELO MS 351 AM CDT SUN APR 28 1991 AT 0345 AM CDT...TUPELO NATIONAL WEATHER SERVICE RADAR WAS INDICATING A LINE OF VERY HEAVY THUNDERSTORMS FROM ENID RESEVOIR EXTENDING TO THE NORTHEAST TO NORTHERN TIPPAH COUNTY IN NORTHEAST MISSISSIPPI. THESE THUNDERSTORMS WERE MOVING TO THE NORTH NORTHEAST AT 35 MILES AN HOUR AND HAVE THE POTENTIAL OF PRODUCING LOCALLY HEAVY RAINS...FREQUENT DANGEROUS LIGHTNING...STRONG GUSTY WINDS AND HAIL. ANYONE LIVING IN OR NEAR THE PATH OF THESE THUNDERSTORMS SHOULD REMAIN WEATHER ALERT AND TAKE THE NECESSARY PRECAUTIONS SHOULD THREATENING WEATHER APPROACH. MORE STATEMENTS WILL BE ISSUED AS CONDITIONS WARRANT. NNNN
Special weather statement, Apr 28, 5:06 AM CDT, 36 minutes before
MSZ004-005-007-281115-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUPELO MS
506 AM CDT SUN APR 28 1991
.....TORNADO WATCH NO.216 CONTINUES IN EFFECT FOR PARTS OF NORTH
MISSISSIPPI UNTIL 7AM THIS MORNING.....
AT 505 AM CDT...TUPELO NATIONAL WEATHER SERVICE RADAR WAS INDICATING A
LINE OF VERY STRONG THUNDERSTORMS FROM GRENADA RESEVOIR EXTENDING TO
THE NORTHEAST TO NORTHERN ALCORN COUNTY.
THESE THUNDERSTORMS WERE MOVING TO THE NORTHEAST AT 35 MILES AN HOUR
AND HAVE THE POTENTIAL OF PRODUCING LOCALLY HEAVY RAINS...FREQUENT
DANGEROUS LIGHTNING...STRONG GUSTY WINDS AND HAIL.
ANYONE IN OR NEAR THE PATH OF THESE THUNDERSTORMS SHOULD REMAIN
WEATHER ALERT AND TAKE NECESSARY PRECAUTIONS SHOULD THREATENING
WEATHER APPROACH.
MORE STATEMENTS WILL BE ISSUED AS CONDITIONS WARRANT.
NNNNThe office that day
Everything else NWS Memphis, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 11:30 PM CDT | Severe Thunderstorm Warning | MEG | Pontotoc | 30 min |
| Apr 28, 12:29 AM CDT | Severe Thunderstorm Warning | MEG | Chickasaw | 31 min |
| Apr 28, 3:17 AM CDT | Severe Thunderstorm Warning | MEG | Lafayette | 28 min |
| Apr 28, 4:15 AM CDT | Severe Thunderstorm Warning | MEG | Tippah, Union | 30 min |
| Apr 28, 8:18 AM CDT | Severe Thunderstorm Warning | MEG | Clay, Oktibbeha | 27 min |
| Apr 28, 8:50 AM CDT | Severe Thunderstorm Warning | MEG | Monroe | 40 min |
| Apr 28, 9:26 AM CDT | Severe Thunderstorm Warning | MEG | Lowndes | 34 min |
| Apr 28, 9:49 AM CDT | Flash Flood Warning | MEG | Lee | 4 hr |
| Apr 28, 6:35 PM CDT | Flash Flood Warning | MEG | Lee | 7 hr |
| Apr 28, 6:40 PM CDT | Severe Thunderstorm Warning | MEG | Itawamba, Monroe | 50 min |
Nearby
Flash Flood Warnings in Mississippi, 1991Every flash flood warning in 1991
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.