Alert archive / Louisiana / Flash Flood Warnings in 2021
Flash Flood Warning 102, NWS Jackson, MS
NWS Jackson, MS issued this flash flood warning at Oct 2, 2021, 3:44 PM CDT for Catahoula Parish, Louisiana. It was in force for 2 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Oct 2, 2021, 3:44 PM CDT (20:44 UTC)
- Expired
- Oct 2, 2021, 5:45 PM CDT
- In force
- 2 hr
- Issued by
- NWS Jackson, MS
- Area
- Storm-based polygon
- Flood severity
- None
County Catahoula Parish, LA
The radar
The Ft Polk radar (KPOE), 131 km from the middle of the area, began a volume at 20:44 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Oct 2, 5:04 PM CDT | FLASH FLOOD | 1 Ene Harrisonburg, LA | HIGHWAY FLOODED AND IMPASSABLE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 8.7 hours before the alert went out and 172 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1407 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 25 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
003
WGUS54 KJAN 022044
FFWJAN
LAC025-022245-
/O.NEW.KJAN.FF.W.0102.211002T2044Z-211002T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Jackson MS
344 PM CDT Sat Oct 2 2021
The National Weather Service in Jackson has issued a
* Flash Flood Warning for...
North Central Catahoula Parish in northeastern Louisiana...
* Until 545 PM CDT.
* At 344 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2 and 4 inches of rain
have fallen. 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...
Wallace Ridge and Harrisonburg.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3176 9190 3182 9171 3175 9169 3174 9169
3173 9169 3173 9170 3172 9170 3171 9171
3167 9187 3172 9191
FLASH FLOOD...RADAR INDICATED
$$
DC2 follow-up statements
268
WGUS74 KJAN 022142
FFSJAN
Flash Flood Statement
National Weather Service Jackson MS
442 PM CDT Sat Oct 2 2021
LAC025-022245-
/O.CON.KJAN.FF.W.0102.000000T0000Z-211002T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Catahoula LA-
442 PM CDT Sat Oct 2 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM CDT THIS
AFTERNOON FOR NORTH CENTRAL CATAHOULA PARISH...
At 442 PM CDT, local law enforcement reported flash flooding across
the warned area. Between 3 and 5 inches of rain have fallen.
Additional rainfall amounts of 1 to 3 inches are possible in the
warned area. Flash flooding is already occurring.
HAZARD...Flash flooding caused by heavy rain.
SOURCE...Law enforcement reported.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Wallace Ridge and Harrisonburg.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3176 9190 3182 9171 3175 9169 3174 9169
3173 9169 3173 9170 3172 9170 3171 9171
3167 9187 3172 9191
FLASH FLOOD...OBSERVED
$$
DC461
WGUS74 KJAN 022234
FFSJAN
Flash Flood Statement
National Weather Service Jackson MS
534 PM CDT Sat Oct 2 2021
LAC025-022245-
/O.CON.KJAN.FF.W.0102.000000T0000Z-211002T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Catahoula LA-
534 PM CDT Sat Oct 2 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM CDT THIS
AFTERNOON FOR NORTH CENTRAL CATAHOULA PARISH...
At 534 PM CDT, local law enforcement reported flash flooding in
Harrisonburg. Between 3 and 5 inches of rain have fallen. Flash
flooding is already occurring.
HAZARD...Flash flooding caused by heavy rain.
SOURCE...Law enforcement reported.
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...
Wallace Ridge and Harrisonburg.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3176 9190 3182 9171 3175 9169 3174 9169
3173 9170 3172 9170 3171 9171 3167 9187
3172 9191
FLASH FLOOD...OBSERVED
$$
DCNearby
Flash Flood Warnings in Louisiana, 2021Every flash flood warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.