Alert archive / Mississippi / Flash Flood Watches in 2021

Flash Flood Watch 7, NWS Jackson, MS

April 23, 202123 counties in Mississippi; 5 parishes in Louisiana

NWS Jackson, MS issued this flash flood watch at Apr 23, 2021, 3:22 PM CDT for 23 counties in Mississippi; 5 parishes in Louisiana. It took effect at Apr 23, 2021, 6:00 PM CDT. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued
Apr 23, 2021, 3:22 PM CDT (20:22 UTC)
In effect from
Apr 23, 2021, 6:00 PM CDT
Expired
Apr 24, 2021, 5:07 AM CDT
In force
11 hr
Issued by
NWS Jackson, MS
Flood severity
None
All 28 counties

Catahoula Parish, LA, Concordia Parish, LA, Franklin Parish, LA, Madison Parish, LA, Tensas Parish, LA, Adams County, MS, Claiborne County, MS, Clarke County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, Franklin County, MS, Hinds County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Lincoln County, MS, Marion County, MS, Newton County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Warren County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 52 km from the middle of the area, began a volume at 20:26 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.

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 8.4 hours before the alert went out and 54 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.

Skew-T log-pSkew-T log-p diagram, Jackson, MS at 12:00Z on 2021-04-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jackson, MS at 12:00Z on 2021-04-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 165 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1652 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
165 m²/s²
0-3 km storm-relative helicity
229 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

890 
WGUS64 KJAN 232022
FFAJAN

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Jackson MS
322 PM CDT Fri Apr 23 2021

LAZ016-023>026-MSZ047>066-072>074-240430-
/O.NEW.KJAN.FF.A.0007.210423T2300Z-210424T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Madison LA-Franklin LA-Catahoula-Tensas-Concordia-Warren-Hinds-
Rankin-Scott-Newton-Lauderdale-Claiborne-Copiah-Simpson-Smith-Jasper-
Clarke-Jefferson-Adams-Franklin MS-Lincoln-Lawrence-Jefferson Davis-
Covington-Jones-Marion-Lamar-Forrest-
Including the cities of Conehatta, Jackson, Richland, Union, Purvis, 
Lumberton, Winnsboro, Brandon, Stonewall, Pearl, Ferriday, 
Vicksburg, Forest, Bude, Vidalia, Collins, St. Joseph, Meridian, 
Hazlehurst, Taylorsville, Harrisonburg, New Hebron, Waterproof, 
Meadville, West Hattiesburg, Monticello, Fayette, Mendenhall, 
Heidelberg, Roxie, Hattiesburg, Quitman, Decatur, West Ferriday, 
Brookhaven, Shubuta, Magee, Bassfield, Raleigh, Port Gibson, 
Jonesville, Crystal Springs, Tallulah, Wesson, Natchez, Prentiss, 
Newton, Bay Springs, Mount Olive, Newellton, Laurel, Morton, and 
Columbia
322 PM CDT Fri Apr 23 2021

...FLASH FLOOD WATCH IN EFFECT THROUGH SATURDAY MORNING...

The National Weather Service in Jackson has issued a

* Flash Flood Watch for portions of northeast Louisiana and 
  Mississippi, including the following areas, in northeast 
  Louisiana, Catahoula, Concordia, Franklin LA, Madison LA and 
  Tensas. In Mississippi, Adams, Claiborne, Clarke, Copiah, 
  Covington, Forrest, Franklin MS, Hinds, Jasper, Jefferson, 
  Jefferson Davis, Jones, Lamar, Lauderdale, Lawrence, Lincoln, 
  Marion, Newton, Rankin, Scott, Simpson, Smith and Warren.

* Through Saturday morning

* A Flash Flood Watch means that conditions may develop that lead to 
  flash flooding. Flash flooding is a very dangerous situation.You 
  should monitor later forecasts and be prepared to take action 
  should flash flood warnings be issued.

$$

19
3 follow-up statements
041 
WGUS64 KJAN 240231
FFAJAN

Flood Watch
National Weather Service Jackson MS
931 PM CDT Fri Apr 23 2021

LAZ016-023>026-MSZ047>066-072>074-241045-
/O.CON.KJAN.FF.A.0007.000000T0000Z-210424T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Madison LA-Franklin LA-Catahoula-Tensas-Concordia-Warren-Hinds-
Rankin-Scott-Newton-Lauderdale-Claiborne-Copiah-Simpson-Smith-Jasper-
Clarke-Jefferson-Adams-Franklin MS-Lincoln-Lawrence-Jefferson Davis-
Covington-Jones-Marion-Lamar-Forrest-
Including the cities of Conehatta, Jackson, Richland, Union, Purvis, 
Lumberton, Winnsboro, Brandon, Stonewall, Pearl, Ferriday, 
Vicksburg, Forest, Bude, Vidalia, Collins, St. Joseph, Meridian, 
Hazlehurst, Taylorsville, Harrisonburg, New Hebron, Waterproof, 
Meadville, West Hattiesburg, Monticello, Fayette, Mendenhall, 
Heidelberg, Roxie, Hattiesburg, Quitman, Decatur, West Ferriday, 
Brookhaven, Shubuta, Magee, Bassfield, Raleigh, Port Gibson, 
Jonesville, Crystal Springs, Tallulah, Wesson, Natchez, Prentiss, 
Newton, Bay Springs, Mount Olive, Newellton, Laurel, Morton, and 
Columbia
931 PM CDT Fri Apr 23 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 9 AM CDT SATURDAY...

The Flash Flood Watch continues for

* Portions of northeast Louisiana and Mississippi, including the 
  following areas, in northeast Louisiana, Catahoula, Concordia, 
  Franklin LA, Madison LA and Tensas. In Mississippi, Adams, 
  Claiborne, Clarke, Copiah, Covington, Forrest, Franklin MS, Hinds, 
  Jasper, Jefferson, Jefferson Davis, Jones, Lamar, Lauderdale, 
  Lawrence, Lincoln, Marion, Newton, Rankin, Scott, Simpson, Smith 
  and Warren.

* Until 9 AM CDT Saturday

* A Flash Flood Watch means that conditions may develop that lead to 
  flash flooding. Flash flooding is a very dangerous situation.You 
  should monitor later forecasts and be prepared to take action 
  should flash flood warnings be issued.

* Rainfall amounts of 2 to 4 inches with amounts up to 6 inches will 
  likely result in areas of flash flooding.
  Numerous roads may become flooded, closed or washed out. 
  Minor to moderate river flooding is also possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Do not enter or cross flowing water or water of unknown depth.

Stay away or be swept away. River banks and culverts can become 
unstable and unsafe.

&&

$$

22
356 
WGUS64 KJAN 240854
FFAJAN

Flood Watch
National Weather Service Jackson MS
354 AM CDT Sat Apr 24 2021

LAZ016-023>026-MSZ047>049-053-054-059>061-241000-
/O.CAN.KJAN.FF.A.0007.000000T0000Z-210424T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Madison LA-Franklin LA-Catahoula-Tensas-Concordia-Warren-Hinds-
Rankin-Claiborne-Copiah-Jefferson-Adams-Franklin MS-
Including the cities of Jackson, Richland, Winnsboro, Brandon, 
Pearl, Ferriday, Vicksburg, Bude, Vidalia, St. Joseph, Hazlehurst, 
Harrisonburg, Waterproof, Fayette, Roxie, West Ferriday, Natchez, 
Meadville, Port Gibson, Jonesville, Crystal Springs, Tallulah, 
Newellton, and Wesson
354 AM CDT Sat Apr 24 2021

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for portions of northeast Louisiana and 
Mississippi, including the following areas, in northeast Louisiana, 
Catahoula, Concordia, Franklin LA, Madison LA and Tensas. In 
Mississippi, Adams, Claiborne, Copiah, Franklin MS, Hinds, 
Jefferson, Rankin and Warren has been cancelled.

The Flood Watch is cancelled.

$$

MSZ050>052-055>058-062>066-072>074-241400-
/O.CON.KJAN.FF.A.0007.000000T0000Z-210424T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Scott-Newton-Lauderdale-Simpson-Smith-Jasper-Clarke-Lincoln-Lawrence-
Jefferson Davis-Covington-Jones-Marion-Lamar-Forrest-
Including the cities of Conehatta, Union, Purvis, Lumberton, Forest, 
Collins, Meridian, Taylorsville, New Hebron, West Hattiesburg, 
Monticello, Mendenhall, Heidelberg, Hattiesburg, Columbia, Prentiss, 
Decatur, Magee, Stonewall, Bassfield, Brookhaven, Quitman, Newton, 
Bay Springs, Mount Olive, Shubuta, Laurel, Morton, and Raleigh
354 AM CDT Sat Apr 24 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING...

The Flash Flood Watch continues for

* Portions of central Mississippi...east central Mississippi...south 
  central Mississippi and southeast Mississippi, including the 
  following areas, in central Mississippi, Scott, Simpson and Smith. 
  In east central Mississippi, Clarke, Jasper, Lauderdale and 
  Newton. In south central Mississippi, Jefferson Davis, Lawrence, 
  Lincoln and Marion. In southeast Mississippi, Covington, Forrest, 
  Jones and Lamar.

* Until 9 AM CDT this morning

* A Flash Flood Watch means that conditions may develop that lead to 
  flash flooding. Flash flooding is a very dangerous situation.You 
  should monitor later forecasts and be prepared to take action 
  should flash flood warnings be issued.

* Rainfall amounts of 2 to 4 inches with amounts up to 6 inches will 
  likely result in areas of flash flooding.
  Numerous roads may become flooded, closed or washed out. 
  Minor to moderate river flooding is also possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Do not enter or cross flowing water or water of unknown depth.

Stay away or be swept away. River banks and culverts can become 
unstable and unsafe.

&&

$$

22
088 
WGUS64 KJAN 241007
FFAJAN

Flood Watch
National Weather Service Jackson MS
507 AM CDT Sat Apr 24 2021

MSZ050>052-055>058-062>066-072>074-241115-
/O.CAN.KJAN.FF.A.0007.000000T0000Z-210424T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Scott-Newton-Lauderdale-Simpson-Smith-Jasper-Clarke-Lincoln-Lawrence-
Jefferson Davis-Covington-Jones-Marion-Lamar-Forrest-
Including the cities of Conehatta, Union, Purvis, Lumberton, Forest, 
Collins, Meridian, Taylorsville, New Hebron, West Hattiesburg, 
Monticello, Mendenhall, Heidelberg, Hattiesburg, Columbia, Prentiss, 
Decatur, Magee, Stonewall, Bassfield, Brookhaven, Quitman, Newton, 
Bay Springs, Mount Olive, Shubuta, Laurel, Morton, and Raleigh
507 AM CDT Sat Apr 24 2021

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for portions of central Mississippi...east 
central Mississippi...south central Mississippi and southeast 
Mississippi, including the following areas, in central Mississippi, 
Scott, Simpson and Smith. In east central Mississippi, Clarke, 
Jasper, Lauderdale and Newton. In south central Mississippi, 
Jefferson Davis, Lawrence, Lincoln and Marion. In southeast 
Mississippi, Covington, Forrest, Jones and Lamar has been cancelled.

The Flood Watch is cancelled. Flooding is no longer expected to pose 
a threat. Please continue to heed remaining road closures.

$$

DB

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 23, 3:28 PM CDTRiver Flood WarningJANFranklin30 hr

Nearby

Flash Flood Watches in Mississippi, 2021Flash Flood Watches in Louisiana, 2021Every flash flood watch 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; radar from the NEXRAD Level II archive.