Alert archive / Louisiana / Flash Flood Warnings in 1999
Flash Flood Warning 38, NWS Jackson, MS
NWS Jackson, MS issued this flash flood warning at Feb 9, 1999, 11:09 AM CST for Franklin Parish, Louisiana. It was in force for 111 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Feb 9, 1999, 11:09 AM CST (17:09 UTC)
- Expired
- Feb 9, 1999, 1:00 PM CST
- In force
- 111 min
- Issued by
- NWS Jackson, MS
- Area
- Whole counties
County Franklin Parish, LA
The nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 5.2 hours before the alert went out and 151 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
- 658 J/kg
- Mixed-layer CIN
- -105 J/kg
- Mixed-layer LCL
- 497 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 136 m²/s²
- 0-3 km storm-relative helicity
- 124 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KJAN 091709 FFWJAN LAC041-091900- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE JACKSON MS 1109 AM CST TUE FEB 9 1999 THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A * FLASH FLOOD WARNING FOR... FRANKLIN PARISH IN NORTHEASTERN LOUISIANA * UNTIL 100 PM CST * AT 1106 AM CST... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM WITH VERY HEAVY RAIN OVER EASTERN FRANKLIN PARISH.... SHOWING LITTLE MOVEMENT. * DOPPLER RADAR INDICATED THAT 2 TO 3 INCHES OF RAIN HAD FALLEN BETWEEN 10 AND 11 AM OVER EASTERN FRANKLIN PARISH. THIS WAS LIKELY CAUSING FLOODING OF ROADS AND SMALL STREAMS. HEAVY RAIN WILL CONTINUE THROUGH NOON OVER THE AREA...WITH THE STORM THEN GRADUALLY WEAKENING AND MOVING TO THE EAST. DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD! 65
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, Feb 9, 9:49 AM CST, 1 hour 20 minutes before
ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074- 110400- AREA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE JACKSON MS 1000 AM CST WED FEB 10 1999 A FRONTAL BOUNDARY JUST NORTH OF THE STATE WILL SLOWLY BEGIN MOVING NORTHWARD TODAY. INCREASING SOUTHERLY FLOW WILL PROVIDE WARM TEMPERATURES AND ABUNDANT MOISTURE OVER THE REGION. WARM AND MOIST CONDITIONS COMBINED WITH AN UNSTABLE AIRMASS WILL PRODUCE SHOWERS AND THUNDERSTORMS THROUGH EARLY EVENING. WHILE A FEW STRONG THUNDERSTORMS MAY DEVELOP...NO WIDESPREAD SEVERE WEATHER IS EXPECTED. ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS AND EMERGENCY MANAGEMENT/CIVIL DEFENSE PERSONNEL WILL NOT BE REQUIRED AT THIS TIME. HOWEVER...EMERGENCY PERSONNEL AND SPOTTERS SHOULD REMAIN ALERT FOR ANY RAPIDLY CHANGING WEATHER CONDITIONS. FOR MORE INFORMATION...PLEASE VISIT OUR INTERNET WEB SITE AT: HTTP://WWW.JANNWS.STATE.MS.US /IN LOWER CASE LETTERS/
Special weather statement, Feb 9, 9:50 AM CST, 1 hour 19 minutes before
ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074- 100400- AREA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE JACKSON MS 950 AM CST TUE FEB 9 1999 WARM...MOIST AIR WILL CONTINUE TO SPREAD NORTH FROM THE GULF OF MEXICO TODAY AHEAD OF A WEAK FRONTAL BOUNDARY. DURING THE MORNING...SCATTERED SHOWERS WILL DEVELOP ACROSS THE FORECAST AREA WITH ISOLATED STRONG THUNDERSTORMS POSSIBLE. THE CHANCE OF SHOWERS AND THUNDERSTORMS WILL INCREASE DURING THE AFTERNOON. AN UPPER LEVEL DISTURBANCE IS EXPECTED TO MOVE ACROSS THE REGION DURING THE MAXIMUM HEATING OF THE DAY. WITH THIS DIURNAL HEATING...THE AIRMASS WILL BECOME MORE UNSTABLE...PARTICULARLY IN THE VICINITY OF THE SLOW-MOVING FRONTAL BOUNDARY. WHILE A FEW STRONG THUNDERSTORMS MAY DEVELOP...NO WIDESPREAD SEVERE WEATHER IS EXPECTED. ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS AND EMERGENCY MANAGEMENT/CIVIL DEFENSE PERSONNEL WILL NOT BE REQUIRED AT THIS TIME. HOWEVER...EMERGENCY PERSONNEL AND SPOTTERS SHOULD REMAIN ALERT FOR ANY RAPIDLY CHANGING WEATHER CONDITIONS. FOR MORE INFORMATION...PLEASE VISIT OUR INTERNET WEB SITE AT: HTTP://WWW.JANNWS.STATE.MS.US /IN LOWER CASE LETTERS/
The office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 9, 8:25 AM CST | Severe Thunderstorm Warning | JAN | Franklin | 35 min |
| Feb 9, 11:56 AM CST | Flash Flood Warning | JAN | Tensas | 2 hr |
| Feb 9, 12:30 PM CST | Severe Thunderstorm Warning | JAN | Tensas | 30 min |
| Feb 9, 2:33 PM CST | Severe Thunderstorm Warning | JAN | Catahoula | 47 min |
| Feb 9, 4:18 PM CST | Severe Thunderstorm Warning | JAN | Catahoula | 32 min |
| Feb 9, 4:24 PM CST | Severe Thunderstorm Warning | JAN | Concordia, Tensas | 36 min |
| Feb 9, 4:48 PM CST | Severe Thunderstorm Warning | JAN | Catahoula | 37 min |
| Feb 9, 5:14 PM CST | Flash Flood Warning | JAN | Catahoula, Concordia | 61 min |
| Feb 9, 5:24 PM CST | Severe Thunderstorm Warning | JAN | Catahoula | 46 min |
Nearby
Flash Flood Warnings in Louisiana, 1999Every flash flood warning in 1999
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.