Alert archive / Mississippi / Flash Flood Warnings in 2021

Flash Flood Warning 2, NWS Jackson, MS

February 11, 20214 counties in Mississippi

NWS Jackson, MS issued this flash flood warning at Feb 11, 2021, 8:47 AM CST for 4 counties in Mississippi. It was in force for 4 hr. 8 reports 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: Feb 11, 2021, 8:47 AM CST (14:47 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

Counties Forrest County, MS, Jefferson Davis County, MS, Lamar County, MS, Marion County, MS

What was reported inside it

Time	Report	Where	Remark
Feb 11, 9:20 AM CST	FLASH FLOOD	1 Sse Columbia, MS	FLASH FLOODING REPORTED AT EAGLE DAY AVENUE & HIGHWAY 98. A FURNITURE STORE NEARBY HAD WATER ENTERING THE BUILDING. TIME ESTIMATED BASED ON RADAR.
Feb 11, 9:20 AM CST	FLASH FLOOD	2 Ne Lampton, MS	PORTION OF COLUMBIA PURVIS RD UNDERWATER, A RESCUE LOOK PLACE IN FLOOD WATERS DUE TO A VEHICLE STUCK.
Feb 11, 9:35 AM CST	FLASH FLOOD	1 E Columbia, MS	FLASH FLOODING REPORTED AT MEADOWOOD DRIVE IN DOWNTOWN COLUMBIA. WATER BEGAN ENTERING A RESIDENTIAL HOME.
Feb 11, 9:35 AM CST	FLASH FLOOD	1 Nw Columbia, MS	FLASH FLOODING REPORTED AT PINEVIEW DRIVE. WATER BEGAN ENTERING A RESIDENTIAL HOME.
Feb 11, 9:40 AM CST	FLASH FLOOD	1 Sse Expose, MS	PORTION OF HWY 13 UNDER WATER.
Feb 11, 9:50 AM CST	FLASH FLOOD	Columbia, MS	MULTIPLE CITY STREETS FLOODED, PARKING LOTS UNDER WATER, WATER INSIDE ONE HOME OF SPECIAL NEEDS PERSON FD/PD DEPLOYING SANDBAGS.
Feb 11, 10:06 AM CST	HEAVY RAIN 3	2 Wsw Hattiesburg, MS	REPORT OF HEAVY RAIN JUST SOUTHWEST OF HATTIESBURG. 3 INCHES OBSERVED BETWEEN 3AM - 730AM. REPORT RELAYED VIA SOCIAL MEDIA.
Feb 11, 12:00 PM CST	HEAVY RAIN 6	1 Sw Columbia, MS	HEAVY RAIN WAS OBSERVED AT THE EOC IN DOWNTOWN COLUMBIA. EM REPORTED NEARLY 3 INCHES FELL THROUGH THE MORNING HOURS AND BY NOON ANOTHER 3 INCHES WAS OBSERVED, FOR A TOTAL AROUND 6 INCHES.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 2.8 hours before the alert went out and 99 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: 1397 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 571 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 182 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 7.5

Open this sounding in Storm Lab

The text

As transmitted.

940 
WGUS54 KJAN 111447
FFWJAN
MSC035-065-073-091-111845-
/O.NEW.KJAN.FF.W.0002.210211T1447Z-210211T1845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Jackson has issued a

* Flash Flood Warning for...
  Southwestern Jefferson Davis County in south central Mississippi...
  Marion County in south central Mississippi...
  Forrest County in southeastern Mississippi...
  Lamar County in southeastern Mississippi...

* Until 1245 PM CST.

* At 845 AM CST, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 4 inches of rain 
  have fallen, and additional heavy rain is expected. Flash flooding 
  is 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...
  Hattiesburg, Petal, Columbia, West Hattiesburg, Sandy Hook, 
  Kokomo, Holly Springs, Purvis, Lumberton, Sumrall, Pine Ridge, 
  Baxterville, Oak Grove, Pinebur, Improve, Rawls Springs, Rock 
  Hill, Pickwick, Bunker Hill and Mclaurin.

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 3139 8996 3142 8996 3143 8915 3091 8914
      3091 8934 3101 8935 3101 8942 3098 8943
      3098 8948 3101 8950 3100 8984 3107 8984
      3107 8992 3113 8994 3113 9001 3118 9001
      3118 9003 3139 9003

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...2-3 INCHES IN 2 HOURS 

$$

EC

1 follow-up statement

663 
WGUS74 KJAN 111615
FFSJAN

Flash Flood Statement
National Weather Service Jackson MS
1015 AM CST Thu Feb 11 2021

MSC035-065-073-091-111845-
/O.CON.KJAN.FF.W.0002.000000T0000Z-210211T1845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Forrest MS-Jefferson Davis MS-Lamar MS-Marion MS-
1015 AM CST Thu Feb 11 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1245 PM CST THIS 
AFTERNOON FOR SOUTHWESTERN JEFFERSON DAVIS, MARION, FORREST AND 
LAMAR COUNTIES...

At 1014 AM CST, Doppler radar continued to indicate thunderstorms 
producing heavy rain across the warned area. Between 3 and 5 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...
  Hattiesburg, Petal, Columbia, West Hattiesburg, Sandy Hook, 
  Kokomo, Holly Springs, Purvis, Lumberton, Sumrall, Pine Ridge, 
  Baxterville, Oak Grove, Pinebur, Improve, Rawls Springs, Rock 
  Hill, Pickwick, Bunker Hill and Mclaurin.

Additional rainfall amounts of 1 to 2 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 3139 8996 3142 8996 3143 8915 3091 8914
      3091 8934 3101 8935 3101 8942 3098 8943
      3098 8948 3101 8950 3100 8984 3107 8984
      3107 8992 3113 8994 3113 9001 3118 9001
      3118 9003 3139 9003

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 2 HOURS 

$$

EC

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, 8:42 AM CST	Flash Flood Warning	JAN	Jones	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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.