Alert archive / Mississippi / Flash Flood Warnings in 2021

Flash Flood Warning 1, NWS Jackson, MS

February 11, 2021Jones County, Mississippi

NWS Jackson, MS issued this flash flood warning at Feb 11, 2021, 8:42 AM CST for Jones County, Mississippi. It was in force for 4 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: Feb 11, 2021, 8:42 AM CST (14:42 UTC)
Expired: Feb 11, 2021, 12:45 PM CST
In force: 4 hr
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Flood severity: None

County Jones County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 106 km from the middle of the area, began a volume at 14:41 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, 2.7 hours before the alert went out and 115 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 398 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 250 m²/s²
0-3 km storm-relative helicity: 347 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

As transmitted.

514 
WGUS54 KJAN 111442
FFWJAN
MSC067-111845-
/O.NEW.KJAN.FF.W.0001.210211T1442Z-210211T1845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Jackson MS
842 AM CST Thu Feb 11 2021

The National Weather Service in Jackson has issued a

* Flash Flood Warning for...
  Central Jones County in southeastern Mississippi...

* Until 1245 PM CST.

* At 841 AM CST, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 3 inches of rain 
  have fallen. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Doppler radar.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other
           drainage and low lying areas.

* Some locations that will experience flash flooding include...
  Laurel, Ellisville, Tuckers Crossing and Mill Creek.

Additional rainfall amounts of 2 to 3 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3155 8940 3180 8912 3172 8894 3171 8894
      3152 8912

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...2-5 INCHES IN 2 HOURS 

$$

JNE

1 follow-up statement

415 
WGUS74 KJAN 111617
FFSJAN

Flash Flood Statement
National Weather Service Jackson MS
1017 AM CST Thu Feb 11 2021

MSC067-111845-
/O.CON.KJAN.FF.W.0001.000000T0000Z-210211T1845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Jones MS-
1017 AM CST Thu Feb 11 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1245 PM CST THIS 
AFTERNOON FOR CENTRAL JONES COUNTY...

At 1016 AM CST, Doppler radar indicated thunderstorms producing 
heavy rain across the warned area. Between 2 and 3 inches of rain 
have fallen. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Doppler radar.

IMPACT...Flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other
         drainage and low lying areas.

Some locations that will experience flash flooding include...
  Laurel, Ellisville and Tuckers Crossing.

Additional rainfall amounts of 2 to 3 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3154 8932 3172 8912 3167 8899 3164 8901
      3153 8916

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...2-5 INCHES IN 2 HOURS 

$$

JNE

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 11, 1:34 AM CST	Special Weather Statement	JAN	Jefferson Davis, Lawrence	41 min
Feb 11, 2:10 AM CST	Special Weather Statement	JAN	Copiah	50 min
Feb 11, 2:45 AM CST	Special Weather Statement	JAN	Smith	45 min
Feb 11, 3:28 AM CST	Special Weather Statement	JAN	Scott	47 min
Feb 11, 3:40 AM CST	Severe Thunderstorm Warning	JAN	Leake, Neshoba, Newton, Scott	50 min
Feb 11, 4:11 AM CST	Special Weather Statement	JAN	Winston	49 min
Feb 11, 4:16 AM CST	Special Weather Statement	JAN	Lamar, Marion	44 min
Feb 11, 4:57 AM CST	Special Weather Statement	JAN	Lamar	48 min
Feb 11, 8:47 AM CST	Flash Flood Warning	JAN	Forrest, Jefferson Davis, Lamar, Marion	4 hr
Feb 11, 9:26 AM CST	Special Weather Statement	JAN	Forrest, Lamar	49 min
Feb 11, 11:15 AM CST	River Flood Warning	JAN	Attala, Holmes	32 hr
Feb 11, 3:43 PM CST	Winter Weather Advisory	JAN	Adams, Bolivar, Carroll, Claiborne, Franklin, Grenada and 14 more	20 hr

Nearby

Flash Flood Warnings in Mississippi, 2021 Every 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; radar from the NEXRAD Level II archive.