Alert archive / Mississippi / Flash Flood Warnings in 2021
Flash Flood Warning 90, NWS New Orleans, LA
NWS New Orleans, LA issued this flash flood warning at Aug 29, 2021, 6:09 PM CDT for Saint Tammany Parish, Louisiana; Hancock County, Harrison County, Mississippi. It was in force for 8 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
- Aug 29, 2021, 6:09 PM CDT (23:09 UTC)
- Expired
- Aug 30, 2021, 2:30 AM CDT
- In force
- 8 hr
- Issued by
- NWS New Orleans, LA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Saint Tammany Parish, LA, Hancock County, MS, Harrison County, MS
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 11.2 hours before the alert went out and 29 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
- 3256 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- -55 m²/s²
- 0-3 km storm-relative helicity
- 85 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.3
The text
As transmitted.
709
WGUS54 KLIX 292309
FFWLIX
LAC103-MSC045-047-300130-
/O.NEW.KLIX.FF.W.0090.210829T2309Z-210830T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
609 PM CDT Sun Aug 29 2021
The National Weather Service in New Orleans has issued a
* Flash Flood Warning for...
Eastern St. Tammany Parish in southeastern Louisiana...
Hancock County in southern Mississippi...
Southwestern Harrison County in southern Mississippi...
* Until 830 PM CDT.
* At 609 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2.5 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...
Long Beach, Bay St. Louis, Waveland, Diamondhead, Kiln, Shoreline
Park, Stennis Space Center and Pearlington.
This includes the following Interstates...
Interstate 10 in Mississippi between mile markers 2 and 26.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3039 8966 3044 8964 3052 8947 3062 8944
3063 8932 3033 8918 3031 8928 3035 8927
3036 8928 3038 8932 3037 8935 3034 8938
3034 8933 3032 8932 3030 8933 3025 8942
3019 8948 3019 8958 3024 8961 3031 8962
FLASH FLOOD...RADAR INDICATED
$$
TD3 follow-up statements
671
WGUS54 KLIX 300123
FFWLIX
LAC103-MSC045-047-300330-
/O.EXT.KLIX.FF.W.0090.000000T0000Z-210830T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
823 PM CDT Sun Aug 29 2021
The National Weather Service in New Orleans has extended the
* Flash Flood Warning for...
Eastern St. Tammany Parish in southeastern Louisiana...
Hancock County in southern Mississippi...
Southwestern Harrison County in southern Mississippi...
* Until 1030 PM CDT.
* At 823 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2.5 and 4 inches of
rain have fallen. Additional rainfall amounts of 2 to 3 inches are
possible in the warned area. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Long Beach, Bay St. Louis, Waveland, Diamondhead, Kiln, Shoreline
Park, Stennis Space Center and Pearlington.
This includes the following Interstates...
Interstate 10 in Mississippi between mile markers 2 and 26.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3039 8966 3044 8964 3052 8947 3062 8944
3063 8932 3033 8918 3031 8928 3035 8927
3036 8928 3038 8932 3037 8935 3034 8938
3034 8933 3032 8932 3030 8933 3025 8942
3019 8948 3019 8958 3024 8961 3031 8962
FLASH FLOOD...RADAR INDICATED
$$
CAB575
WGUS54 KLIX 300320
FFWLIX
LAC103-MSC045-047-300530-
/O.EXT.KLIX.FF.W.0090.000000T0000Z-210830T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
1020 PM CDT Sun Aug 29 2021
The National Weather Service in New Orleans has extended the
* Flash Flood Warning for...
Eastern St. Tammany Parish in southeastern Louisiana...
Hancock County in southern Mississippi...
Southwestern Harrison County in southern Mississippi...
* Until 1230 AM CDT.
* At 1020 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 3 and 6 inches of rain
have fallen. Additional rainfall amounts of 2 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...
Long Beach, Bay St. Louis, Waveland, Diamondhead, Kiln, Shoreline
Park, Stennis Space Center and Pearlington.
This includes the following Interstates...
Interstate 10 in Mississippi between mile markers 2 and 26.
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 3039 8966 3044 8964 3052 8947 3062 8944
3063 8932 3033 8918 3031 8928 3035 8927
3036 8928 3038 8932 3037 8935 3034 8938
3034 8933 3032 8932 3030 8933 3025 8942
3019 8948 3019 8958 3024 8961 3031 8962
FLASH FLOOD...RADAR INDICATED
$$
CAB774
WGUS54 KLIX 300513
FFWLIX
LAC103-MSC045-047-300730-
/O.EXT.KLIX.FF.W.0090.000000T0000Z-210830T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
1213 AM CDT Mon Aug 30 2021
The National Weather Service in New Orleans has extended the
* Flash Flood Warning for...
Eastern St. Tammany Parish in southeastern Louisiana...
Hancock County in southern Mississippi...
Southwestern Harrison County in southern Mississippi...
* Until 230 AM CDT.
* At 1213 AM CDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between
3 and 7 inches of rain have fallen. Additional rainfall amounts of
1 to 3 inches are possible in the warned area. Flash flooding is
ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar and automated gauges.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Long Beach, Bay St. Louis, Waveland, Diamondhead, Kiln, Shoreline
Park, Stennis Space Center and Pearlington.
This includes the following Interstates...
Interstate 10 in Mississippi between mile markers 2 and 26.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3039 8966 3044 8964 3052 8947 3062 8944
3063 8932 3033 8918 3031 8928 3035 8927
3036 8928 3038 8932 3037 8935 3034 8938
3034 8933 3032 8932 3030 8933 3025 8942
3019 8948 3019 8958 3024 8961 3031 8962
FLASH FLOOD...RADAR AND GAUGE INDICATED
$$
CABThe office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 6:23 AM CDT | Special Marine Warning | LIX | 22 min | |
| Aug 29, 7:49 AM CDT | Extreme Wind Warning | LIX | Jefferson, Lafourche, Plaquemines, Saint Bernard, Saint Charles, Terrebonne | 3 hr |
| Aug 29, 10:30 AM CDT | Extreme Wind Warning | LIX | Jefferson, Lafourche, Plaquemines, Saint Bernard, Saint Charles, Terrebonne | 3 hr |
| Aug 29, 1:26 PM CDT | Extreme Wind Warning | LIX | Assumption, Jefferson, Lafourche, Plaquemines, Saint Charles, Saint James and 2 more | 3 hr |
| Aug 29, 2:42 PM CDT | Special Marine Warning | LIX | 18 min | |
| Aug 29, 3:39 PM CDT | Flash Flood Warning | LIX | Lafourche, Terrebonne | 7 hr |
| Aug 29, 4:08 PM CDT | Flash Flood Warning | LIX | Jefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles, Saint John the Baptist | 8 hr |
| Aug 29, 4:23 PM CDT | Extreme Wind Warning | LIX | Jefferson, Lafourche, Saint Charles, Saint James, Saint John the Baptist, Terrebonne | 2 hr |
| Aug 29, 5:01 PM CDT | Flash Flood Warning | LIX | Plaquemines | 6 hr |
| Aug 29, 5:04 PM CDT | Special Marine Warning | LIX | 26 min | |
| Aug 29, 6:04 PM CDT | Special Marine Warning | LIX | 26 min | |
| Aug 29, 6:21 PM CDT | Flash Flood Warning | LIX | Saint Tammany | 16 hr |
| Aug 29, 6:25 PM CDT | Tornado Warning | LIX | Orleans, Saint Bernard, Saint Tammany | 35 min |
| Aug 29, 6:33 PM CDT | Special Marine Warning | LIX | 57 min | |
| Aug 29, 6:54 PM CDT | Tornado Warning | LIX | Saint Tammany | 36 min |
| Aug 29, 6:21 AM CDT | Tornado Warning | LIX | Hancock, Harrison | 24 min |
| Aug 29, 8:10 AM CDT | Tornado Warning | LIX | Jackson | 24 min |
| Aug 29, 2:15 PM CDT | Tornado Warning | LIX | Hancock, Harrison, Pearl River | 15 min |
| Aug 29, 3:07 PM CDT | Tornado Warning | LIX | Hancock | 23 min |
| Aug 29, 5:12 PM CDT | Tornado Warning | LIX | Harrison | 33 min |
| Aug 29, 5:20 PM CDT | Flash Flood Warning | LIX | Harrison | 5 hr |
Nearby
Flash Flood Warnings in Mississippi, 2021Flash 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; the sounding from the Mesonet's radiosonde archive.