Alert archive / Louisiana / Flash Flood Warnings in 1999
Flash Flood Warning 39, NWS Jackson, MS
NWS Jackson, MS issued this flash flood warning at Feb 9, 1999, 11:56 AM CST for Tensas Parish, Louisiana. It was in force for 2 hr. 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, 11:56 AM CST (17:56 UTC)
- Expired
- Feb 9, 1999, 2:00 PM CST
- In force
- 2 hr
- Issued by
- NWS Jackson, MS
- Area
- Whole counties
County Tensas Parish, LA
The nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 5.9 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
- 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 091756 FFWJAN LAC107-092000- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE JACKSON MS 1156 AM CST TUE FEB 9 1999 THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A * FLASH FLOOD WARNING FOR... TENSAS PARISH IN NORTHEASTERN LOUISIANA * UNTIL 200 PM CST * AT 1155 AM CST... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A COMPLEX OF THUNDERSTORM2 WITH VERY HEAVY RAIN FROM NEWLIGHT TO NEWELLTON...MOVING SLOWLY EAST. * RAINFALL AMOUNTS OF 2 TO 3 INCHES HAVE LIKELY FALLEN SINCE 1000 AM AND MORE RAIN OF 1 INCH PER HOUR WILL CONTINUE THROUGH 200 PM. DON'T DRIVE ACROSS FLOODED ROADS! MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. AREA RESIDENTS SHOULD MONITOR FLOOD CONDITIONS... AND BE PREPARED TO MOVE TO HIGHER GROUND... SHOULD FLOOD WATERS THREATEN. IF FLASH FLOODING IS OBSERVED... ACT QUICKLY. MOVE TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. 76
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, 2 hours 7 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, 2 hours 6 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, 11:09 AM CST | Flash Flood Warning | JAN | Franklin | 111 min |
| 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.