Alert archive / Mississippi / Flash Flood Warnings in 1991
Flash Flood Warning 49, NWS Jackson, MS
NWS Jackson, MS issued this flash flood warning at Apr 29, 1991, 4:57 PM CDT for Covington County, Forrest County, Lamar County, Mississippi. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Apr 29, 1991, 4:57 PM CDT (21:57 UTC)
- Expired
- Apr 29, 1991, 9:00 PM CDT
- In force
- 4 hr
- Issued by
- NWS Jackson, MS
- Area
- Whole counties
Counties Covington County, MS, Forrest County, MS, Lamar County, MS
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 10.0 hours before the alert went out and 124 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
- 2664 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 578 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 193 m²/s²
- 0-3 km storm-relative helicity
- 211 m²/s²
- Significant tornado parameter
- 2.6
- Supercell composite
- 12.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KJAN 292200 COR FFWJAN MSC127-129-031-065-077-091-147-035-073-113-300200- BULLETIN - EBS ACTIVATION REQUESTED...CORRECTION TO WARNING FLOOD WARNING NATIONAL WEATHER SERVICE JACKSON MS 457 PM CDT MON APR 29 1991 THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A FLOOD WARNING EFFECTIVE UNTIL 900 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN CENTRAL MISSISSIPPI ...SIMPSON COUNTY...SMITH COUNTY IN SOUTH CENTRAL MISSISSIPPI ...COVINGTON COUNTY...JEFFERSON.DAVIS COUNTY...LAWRENCE COUNTY ...MARION COUNTY...WALTHALL COUNTY IN SOUTHEAST MISSISSIPPI ...FORREST COUNTY...LAMAR COUNTY IN SOUTHWEST MISSISSIPPI ...PIKE COUNTY AT 455PM MORE SHOWERS AND THUNDERSTORMS WERE DEVELOPING BETWEEN MCCOMB AND NEW ORLEANS AND WERE HEADING FOR SOUTHEAST MISSISSIPPI. ADDITIONAL HEAVY RAINFALL WILL CONTINUE AT LEAST THROUGH THE EVENING HOURS AND ONLY AGGRAVATE ONGOING FLOODING IN THESE AREAS. SEVERAL ROADS IN JEFFERSON-DAVIS WERE COVERED BY WATER AND PROBLEMS WERE DEVELOPING IN SIMPSON COUNTY AS WELL. RAINFALL AMOUNTS OF 2 TO 4 INCHES HAVE FALLEN IN MUCH OF THESE COUNTIES SINCE DAYBREAK AND MORE RAIN IS ON THE WAY WITH ANOTHER 2 TO 4 INCHES POSSIBLE BY EARLY TUESDAY. DvO NOT DRIVE YOUR CAR INTO AREAS WHERE WATER COVERS THE ROAD. THE WATER DEPTH MAY BE TOO DEEP TO ALLOW YOU TO CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER MUST BE ABANDONED QUICKLY. <
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 29, 11:31 AM CDT, 5 hours 26 minutes before
MSZ009-012-ALZ008-013-291730- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MERIDIAN MS 1129 AM CDT MON APR 29 1991 TORNADO WATCH NUMBER 237 IS NO LONGER IN EFFECT FOR CLARKE...JONES AND WAYNE COUMTIES IN EAST CENTRAL MISSISIPPI AND CHOCTAW AND SUMTER COUNTIES IN EXTREME WEST CENTRAL ALABAMA. HOWEVER TORNADO WATCH NUMBER 237 REMAINS IN EFFECT FOR OTHER PARTS OF MISSISSIPPI AND ALABAMA AND LOUISIANA. A FLASH FLOOD WATCH REMAINS IN EFFECT TODAY FOR PARTS OF MISSISSIPPI AND ALABAMA. AT 1125 AM CDT RADAR INDICATED A LARGE AREA OF RAIN AND THUNDERSTORMS OVER A LARGE PART OF MISSISSIPPI AND ALABAMA. ALTHOUGH RADAR INDICATED THE THUNDERSTORMS OVER EAST CENTRAL MISSISSIPPI AND EXT REME WEST CENTRAL ALABAMA HAD DECREASED DURING THE PAST HOUR ANY ADDITIONAL HEAVY RAINFALL WILL CAUSE FLOODING IN THE AREA.
Special weather statement, Apr 29, 11:43 AM CDT, 5 hours 14 minutes before
MSZALL-ARZ014>016-LAZ002-003-004-006-009-010-013- ALZ004-008-013-016-291625- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE JACKSON MS 1125 AM CDT MON APR 29 1991 TORNADO WATCH NUMBER 237 REMAINS IN EFFECT UNTIL 1 PM THIS MONDAY AFTERNOON FOR A LARGE PORTION OF SOUTHEAST MISSISSIPPI. AT 1125 AM CDT...NUMEROUS THUNDERSTORMS...WITH VERY HEAVY RAINFALL CONTINUED FROM MERIDIAN SOUTH TO MC CLAIN MISSISSIPPI THEN WEST TO BOGALUSA LOUISIANA. SOME STREET FLOODING HAS BEEN REPORTED IN THE HATTIESBURG AREA. THIS AREA WAS MOVING SOUTHEAST AT 15 MILES AN HOUR. ELSEWHERE WIDELY SCATTERED THUNDERSTORMS...A FEW WITH HEAVY RAINFALL... MIXED IN A LARGE AREA OF MOSTLY LIGHT RAIN COVERED MOST OF MISSISSIPPI ...WEST CENTRAL ALABAMA...AND EASTERN LOUISIANA. INDIVIDUAL THUNDERSTORMS WERE MOVING NORTHEAST AT 35 MILES AN HOUR.
Special weather statement, Apr 29, 12:36 PM CDT, 4 hours 21 minutes before
MSZALL-ARZ014>016-LAZ002-003-004-006-009-010-013- ALZ004-008-013-016-291800- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE JACKSON MS 1225 PM CDT MON APR 29 1991 TORNADO WATCH NUMBER 237 REMAINS IN EFFECT FOR PORTIONS OF SOUTHEAST MISSISSIPPI UNTIL 1 PM THIS MONDAY AFTERNOON...TORNADO WATCH NUMBER 239 HAS BEEN ISSUED FOR THE EXTREME SOUTHEAST CORNER OF SOUTHEAST MISSISSIPPI UNTIL 8 PM THIS MONDAY EVENING. AT 1225 PM CDT...WIDELY SCATTERED THUNDERSTORMS...A FEW WITH HEAVY RAINFALL...MIXED IN A LARGE AREA OF MOSTLY LIGHT RAIN CONTINUED TO COVER MOST OF MISSISSIPPI EXCEPT FOR THE EXTREME NORTHWEST COUNTIES. THIS RAINFALL EXTENDED INTO MOST OF LOUISIANA...EXCEPT THE NORTHWEST PORTION AND OVER MUCH OF SOUTHWEST ALABAMA. THE STRONGER THUNDERSTORMS HAVE MOVED INTO INTERIOR SOUTHWEST ALABAMA. THE BACK EDGE OF THIS RO^UND OF RAINFALL WAS EVIDENT OVER NORTHEAST AND CENTRAL LOUISIANA FROM RAYVILLE TO DRY PRONG.
Special weather statement, Apr 29, 1:35 PM CDT, 3 hours 22 minutes before
MSZALL-ARZ014>016-LAZ002-003-004-006-009-010-013- ALZ004-008-013-016-300100- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE JACKSON MS 126 PM CDT MON APR 29 1991 TORNADO WATCH NUMBER 237 EXPIRED AT 1 PM...TORNADO WATCH NUMBER 239 REMAINS IN EFFECT UNTIL 8 PM THIS MONDAY EVENING FOR THE EXTREME SOUTHEAST COUNTIES OF MISSISSIPPI. AT 126 PM CDT...WIDELY SCATTERED THUNDERSTORMS...A FEW WITH HEAVY RAINFALL...CONTINUED OVER MISSISSIPPI MIXED IN A LARGE AREA OF MOSTLY LIGHT RAIN THAT COVERED ALL BUT THE EXTREME NORTHWEST COUNTIES OF MISSISSIPPI. THE RAINFALL EXTENDED WEST INTO NORTHEAST LOUISIANA AND THE EXTREME SOUTHERN FRINGES OF EXTREME SOUTHEAST ARKANSAS AND OVER SOUTHWEST ALABAMA AND MOST OF SOUTHEAST LOUISIANA. THUNDERSTORMS WERE MORE NUMEROUS OVER EXTREME SOUTHEAST MISSISSIPPI AND OVER SOUTHWEST ALABAMA. MOVEMENT WAS NORTHEAST AT 45 MILES AN HOUR.
Special weather statement, Apr 29, 2:36 PM CDT, 2 hours 21 minutes before
MSZALL-ARZ014>016-LAZ002-003-004-006-009-010-013- ALZ004-008-013-016-302000- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE JACKSON MS 225 PM CDT MON APR 19 1991 TORNADO WATCH NUMBER 239 FOR EXTREME SOUTHEAST MISSISSIPPI HAS BEEN CANCELED... AT 225 PM CDT...WIDELY SCATTERED THUNDERSTORMS...A FEW WITH HEAVY RAIN- FALL...CONTINUED MIXED IN A LARGE AREA OF MOSTLY LIGHT RAIN THAT COVERED MOST OF MISSISSIPPI...SOUTHWEST ALABAMA AND SOUTHEAST LOUISIANA. THE HEAVIER RAINFALL WAS INDICATED ACROSS THE CENTRAL SECTIONS OF MISSISSIPPI NORTH TO SOUTH FROM WESSON TO TYLERTOWN. MOVEMENT WAS NORTHEAST AT 45 MILES AN HOUR. A FEW THUNDERSTORMS WERE DEVELOPING OVER NORTH CENTRAL AND CENTRAL LOUISIANA.
The office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 28, 7:07 PM CDT | Severe Thunderstorm Warning | JAN | Amite, Franklin | 38 min |
| Apr 28, 7:26 PM CDT | Severe Thunderstorm Warning | JAN | Wilkinson | 49 min |
| Apr 28, 7:47 PM CDT | Severe Thunderstorm Warning | JAN | Amite | 28 min |
| Apr 28, 8:20 PM CDT | Severe Thunderstorm Warning | JAN | Franklin | 40 min |
| Apr 28, 9:13 PM CDT | Flash Flood Warning | JAN | Humphreys, Sharkey, Sunflower, Washington | 2 hr |
| Apr 28, 9:13 PM CDT | Flash Flood Warning | JAN | Issaquena | 2 hr |
| Apr 28, 9:13 PM CDT | Flash Flood Warning | JAN | Bolivar | 2 hr |
| Apr 28, 9:13 PM CDT | Severe Thunderstorm Warning | JAN | Bolivar, Humphreys, Sunflower, Washington | 2 hr |
| Apr 28, 9:13 PM CDT | Severe Thunderstorm Warning | JAN | Issaquena, Sharkey | 2 hr |
| Apr 28, 10:04 PM CDT | Flash Flood Warning | JAN | Yazoo | 116 min |
| Apr 28, 10:04 PM CDT | Flash Flood Warning | JAN | Leflore, Tallahatchie | 116 min |
| Apr 28, 10:04 PM CDT | Severe Thunderstorm Warning | JAN | Leflore, Tallahatchie | 116 min |
| Apr 28, 10:04 PM CDT | Severe Thunderstorm Warning | JAN | Yazoo | 116 min |
| Apr 28, 10:15 PM CDT | Severe Thunderstorm Warning | JAN | Warren | 60 min |
| Apr 28, 10:30 PM CDT | Flash Flood Warning | JAN | Carroll, Holmes | 2 hr |
| Apr 28, 10:30 PM CDT | Severe Thunderstorm Warning | JAN | Carroll, Holmes | 2 hr |
| Apr 28, 10:49 PM CDT | Tornado Warning | JAN | Yazoo | 26 min |
| Apr 28, 11:15 PM CDT | Flash Flood Warning | JAN | Bolivar, Humphreys, Sunflower, Washington | 3 hr |
| Apr 28, 11:15 PM CDT | Flash Flood Warning | JAN | Issaquena, Sharkey | 3 hr |
| Apr 28, 11:45 PM CDT | Flash Flood Warning | JAN | Warren | 2 hr |
| Apr 28, 11:45 PM CDT | Severe Thunderstorm Warning | JAN | Warren | 2 hr |
| Apr 29, 12:02 AM CDT | Flash Flood Warning | JAN | Warren, Yazoo | 3 hr |
| Apr 29, 1:37 AM CDT | Flash Flood Warning | JAN | Carroll, Holmes, Leflore | 83 min |
| Apr 29, 1:48 AM CDT | Severe Thunderstorm Warning | JAN | Adams, Claiborne, Jefferson | 57 min |
| Apr 29, 1:48 AM CDT | Severe Thunderstorm Warning | JAN | Warren | 57 min |
| Apr 29, 1:59 AM CDT | Severe Thunderstorm Warning | JAN | Humphreys, Sharkey, Yazoo | 61 min |
| Apr 29, 2:16 AM CDT | Severe Thunderstorm Warning | JAN | Carroll, Holmes, Leflore | 44 min |
| Apr 29, 2:26 AM CDT | Flash Flood Warning | JAN | Bolivar, Humphreys, Issaquena, Sharkey, Sunflower, Washington | 4 hr |
| Apr 29, 2:59 AM CDT | Severe Thunderstorm Warning | JAN | Hinds, Madison | 61 min |
| Apr 29, 3:07 AM CDT | Flash Flood Warning | JAN | Carroll, Holmes, Leflore, Yazoo | 3 hr |
| Apr 29, 4:43 AM CDT | Flash Flood Warning | JAN | Attala | 3 hr |
| Apr 29, 3:05 PM CDT | Flash Flood Warning | JAN | Covington, Jefferson Davis | 115 min |
| Apr 29, 3:05 PM CDT | Flash Flood Warning | JAN | Lawrence, Marion, Walthall | 115 min |
| Apr 29, 4:57 PM CDT | Flash Flood Warning | JAN | Jefferson Davis, Lawrence, Marion, Simpson, Walthall | 4 hr |
| Apr 29, 4:57 PM CDT | Flash Flood Warning | JAN | Smith | 4 hr |
| Apr 29, 4:57 PM CDT | Flash Flood Warning | JAN | Pike | 4 hr |
| Apr 29, 5:36 PM CDT | Flash Flood Warning | JAN | Neshoba | 3 hr |
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.