Alert archive / Louisiana / Flash Flood Warnings in 2026
Flash Flood Warning 19, NWS Jackson, MS
NWS Jackson, MS issued this flash flood warning at May 21, 2026, 6:56 PM CDT for Franklin Parish, Madison Parish, Tensas Parish, Louisiana. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 21, 2026, 6:56 PM CDT (23:56 UTC)
- Expired
- May 21, 2026, 10:00 PM CDT
- In force
- 3 hr
- Issued by
- NWS Jackson, MS
- Area
- Storm-based polygon
- Flood severity
- None
Counties Franklin Parish, LA, Madison Parish, LA, Tensas Parish, LA
The radar
The Jackson/Brandon,MS radar (KDGX), 153 km from the middle of the area, began a volume at 23:58 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 11.9 hours before the alert went out and 144 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
- 376 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 610 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
418
WGUS54 KJAN 212356
FFWJAN
LAC041-065-107-220300-
/O.NEW.KJAN.FF.W.0019.260521T2356Z-260522T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Jackson MS
656 PM CDT Thu May 21 2026
The National Weather Service in Jackson has issued a
* Flash Flood Warning for...
Eastern Franklin Parish in northeastern Louisiana...
West Central Madison Parish in northeastern Louisiana...
Northwestern Tensas Parish in northeastern Louisiana...
* Until 1000 PM CDT.
* At 656 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 4 and 7 inches of rain
have fallen over the last 4 to 5 hours. Additional rainfall
amounts of 1 to 3 inches are possible in the warned area. Flash
flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Winnsboro, Gilbert, Crowville and Bakers.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3234 9171 3235 9170 3237 9170 3239 9165
3240 9164 3241 9149 3241 9148 3242 9140
3204 9152 3196 9175
FLASH FLOOD...RADAR INDICATED
$$
OAJ2 follow-up statements
888
WGUS74 KJAN 220211
FFSJAN
Flash Flood Statement
National Weather Service Jackson MS
911 PM CDT Thu May 21 2026
LAC041-065-107-220300-
/O.CON.KJAN.FF.W.0019.000000T0000Z-260522T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Franklin LA-Madison LA-Tensas LA-
911 PM CDT Thu May 21 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 10 PM CDT THIS
EVENING FOR EASTERN FRANKLIN, WEST CENTRAL MADISON AND NORTHWESTERN
TENSAS PARISHES...
At 911 PM CDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 5 and 8 inches of rain have
fallen. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Winnsboro, Gilbert, Crowville and Bakers.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3234 9171 3235 9170 3237 9170 3239 9165
3240 9164 3241 9149 3241 9148 3242 9140
3204 9152 3196 9175
FLASH FLOOD...RADAR INDICATED
$$
OAJ936
WGUS74 KJAN 220258
FFSJAN
Flash Flood Statement
National Weather Service Jackson MS
958 PM CDT Thu May 21 2026
LAC041-065-107-220308-
/O.EXP.KJAN.FF.W.0019.000000T0000Z-260522T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Franklin LA-Madison LA-Tensas LA-
958 PM CDT Thu May 21 2026
...FLASH FLOOD WARNING WILL EXPIRE AT 10 PM CDT THIS EVENING FOR
EASTERN FRANKLIN, WEST CENTRAL MADISON AND NORTHWESTERN TENSAS
PARISHES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
&&
LAT...LON 3234 9171 3235 9170 3237 9170 3239 9165
3240 9164 3241 9149 3241 9148 3242 9140
3204 9152 3196 9175
$$
DCWhat 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.
NWS Jackson, MS wrote its last area forecast discussion before this flash flood warning went out at May 21, 4:04 PM CDT, 2 hours 52 minutes earlier. Its key messages:
- There will be a marginal risk for a few brief weak tornadoes over southeast to eastern portions of the area early Friday morning.
- The potential for heavy rainfall and flooding will continue through the weekend, peaking Sunday and Monday.
- We will be monitoring the potential for additional heavy rainfall and flash flooding next week.
Area forecast discussion, May 21, 4:04 PM CDT, 2 hours 52 minutes before
Area Forecast Discussion National Weather Service Jackson MS 404 PM CDT Thu May 21 2026 ...New DISCUSSION... .KEY MESSAGES... - There will be a marginal risk for a few brief weak tornadoes over southeast to eastern portions of the area early Friday morning. - The potential for heavy rainfall and flooding will continue through the weekend, peaking Sunday and Monday. - We will be monitoring the potential for additional heavy rainfall and flash flooding next week. && .DISCUSSION... Issued at 345 PM CDT Thu May 21 2026 In the near term, the next in a series of weak MCVs has combined with a very moist airmass (precipitable water near 2 inches and surface dewpoints in the lower 70s) and peak heating to initiate another round of showers/storms with intense rainfall rates this afternoon. Following days of heavy rainfall, some locations are becoming more flood prone and sensitive to additional heavy rainfall, and so have continued the limited flash flood threat messaging in our HWO graphics. Flash flood threats will tend to peak during the day into the evening, but persistent convergent zones that focus intense rainfall rates for long durations could develop at just about anytime. In addition, An MCV forecast to cross the area late tonight into Friday appears it will enhance the low level shear/vorticity in a very moist boundary layer making any convective updrafts more prone to spinning up weak and brief tornadoes. After assessment of the near term guidance low level shear parameters and convective evolution, it appears that locations along the I-59 corridor will have peak tornado threat during the 4 am to 10 am time frame. An additional limited flash flood threat will accompany this MCV as well. Looking ahead, an unusually long duration of wet weather will continue for the foreseeable future as a large and persistent trough to ridge longwave pattern remains anchored over the CONUS. This will continue to bring our region a steady stream of subtropical moisture with seasonably high precipitable water values, and multiple upper level perturbations that will provide lift and help initiate additional rounds of convective rainfall. Once we get to about Sunday, a greater threat for flash flooding should evolve as a more favorable set-up and couple upper level jet interaction may team up with the very moist air to bring a more widespread heavy rainfall threat. As of now this appears it will be over mainly western/southern portions of the area and have included an "elevated" flood threat in this area. Otherwise, it appears the thermodynamic/shear profiles will not be particularly favorable for severe weather concerns given the deep moisture and influence from the southeast CONUS ridge, but as is the case in the near term, we'll need to monitor for marginal tornado risks given the potential for enhanced low level shear in the very moist air. As previously mentioned, it's difficult to find an end to this wet pattern in the guidance through most of the remainder of the month. /EC/ && .AVIATION... (18Z TAFS) Issued at 110 PM CDT Thu May 21 2026 A mix of VFR/MVFR/IFR conditions will be possible at all sites through the TAF period as rain and low ceilings impact the area. Brief periods of lowered categories will be possible during bouts of heavier rainfall./KP/ && .PRELIMINARY POINT TEMPS/POPS... Jackson 68 80 68 85 / 90 80 60 70 Meridian 68 81 68 85 / 70 90 80 80 Vicksburg 67 81 68 85 / 90 70 40 70 Hattiesburg 70 82 69 85 / 60 90 70 90 Natchez 68 81 69 85 / 90 70 40 80 Greenville 67 81 67 84 / 90 70 40 60 Greenwood 67 80 67 85 / 80 90 70 60 && .JAN WATCHES/WARNINGS/ADVISORIES... MS...None. LA...None. AR...None. && EC/KP
In the hours before
Special weather statement, May 21, 1:40 PM CDT, 5 hours 16 minutes before
Special Weather Statement
National Weather Service Jackson MS
140 PM CDT Thu May 21 2026
MSZ054-062-063-211930-
Lawrence MS-Copiah MS-Lincoln MS-
140 PM CDT Thu May 21 2026
...A STRONG THUNDERSTORM WILL IMPACT NORTHEASTERN LINCOLN...
NORTHWESTERN LAWRENCE AND SOUTHEASTERN COPIAH COUNTIES THROUGH 230 PM
CDT...
At 139 PM CDT, Doppler radar was tracking a strong thunderstorm with
very heavy rain near East Lincoln, or 7 miles east of Brookhaven,
moving north at 20 mph.
HAZARD...Wind gusts up to 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
This strong thunderstorm will be near...
Brookhaven and Sontag around 145 PM CDT.
Wesson and Beauregard around 150 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 3146 9020 3146 9041 3176 9047 3176 9016
TIME...MOT...LOC 1839Z 178DEG 18KT 3156 9032
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
ECSpecial weather statement, May 21, 6:20 PM CDT, 36 minutes before
Special Weather Statement
National Weather Service Jackson MS
620 PM CDT Thu May 21 2026
MSZ059>061-220000-
Adams MS-Jefferson MS-Franklin MS-
620 PM CDT Thu May 21 2026
...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN FRANKLIN...SOUTH
CENTRAL JEFFERSON AND EAST CENTRAL ADAMS COUNTIES THROUGH 700 PM
CDT...
At 620 PM CDT, Doppler radar was tracking a strong thunderstorm near
Roxie, or 14 miles west of Meadville, moving northeast at 30 mph.
HAZARD...Wind gusts up to 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
This strong thunderstorm will be near...
Roxie, Hamburg, Kirby, Stampley, and Mcnair around 625 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
High winds can bring down trees and large limbs resulting in serious
injury or property damage. Exercise extreme caution when outdoors
during such strong winds...and be especially aware of older trees.
&&
LAT...LON 3135 9117 3153 9127 3177 9101 3151 9075
3134 9115
TIME...MOT...LOC 2320Z 231DEG 24KT 3150 9113
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
OAJNearby
Flash Flood Warnings in Louisiana, 2026Every flash flood warning in 2026
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; radar from the NEXRAD Level II archive.