Alert archive / Mississippi / Flash Flood Warnings in 2021

Flash Flood Warning 7, NWS Mobile, AL

March 24, 20214 counties in Mississippi

NWS Mobile, AL issued this flash flood warning at Mar 24, 2021, 9:32 PM CDT for 4 counties in Mississippi. It was in force for 4 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: Mar 24, 2021, 9:32 PM CDT (02:32 UTC)
Expired: Mar 25, 2021, 1:43 AM CDT
In force: 4 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

Counties George County, MS, Greene County, MS, Perry County, MS, Stone County, MS

The radar

The Mobile radar (KMOB), 81 km from the middle of the area, began a volume at 02:33 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
Mar 24, 11:30 PM CDT	FLASH FLOOD	Wiggins, MS	ROADS FLOODED AND CLOSED DUE TO FLASH FLOODING IN AND AROUND THE WIGGINS AREA. THEY INCLUDE BIG 4 RD AT BLUFF CREEK RD, RALPH MILLER RD, AND STUMP TEXAS RD.

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 00:00Z, 2.5 hours before the alert went out and 89 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: 109 J/kg
Mixed-layer CIN: -186 J/kg
Mixed-layer LCL: 681 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 281 m²/s²
0-3 km storm-relative helicity: 382 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 7.0

Open this sounding in Storm Lab

The text

As transmitted.

294 
WGUS54 KMOB 250232
FFWMOB
MSC039-041-111-131-250830-
/O.NEW.KMOB.FF.W.0007.210325T0232Z-210325T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
932 PM CDT Wed Mar 24 2021

The National Weather Service in Mobile has issued a

* Flash Flood Warning for...
  Western George County in southeastern Mississippi...
  Southwestern Greene County in southeastern Mississippi...
  Southern Perry County in southeastern Mississippi...
  Stone County in southeastern Mississippi...

* Until 330 AM CDT.

* At 932 PM CDT, Doppler radar and automated rain gauges indicated 
  thunderstorms producing heavy rain across the warned area. Between 
  2 and 4 inches of rain have fallen. Additional rainfall amounts of 
  1 to 2 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...
  Wiggins, Perkinston, McHenry, Whites Crossing, Big Level, Deep 
  Creek, Ramsey Springs, Barbara, Janice, Oak Grove, Bond, Benndale, 
  Ten Mile, Dale, Perry, Avent, Leaf, Crossroads, Texas and Merrill.

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.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3106 8915 3108 8863 3073 8873 3074 8888
      3068 8888 3068 8923 3065 8924 3065 8934
      3091 8934 3091 8914

FLASH FLOOD...RADAR AND GAUGE INDICATED

$$

CGAL

1 follow-up statement

385 
WGUS74 KMOB 250643
FFSMOB

Flash Flood Statement
National Weather Service Mobile AL
143 AM CDT Thu Mar 25 2021

MSC039-041-111-131-250653-
/O.CAN.KMOB.FF.W.0007.000000T0000Z-210325T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
George MS-Greene MS-Perry MS-Stone MS-
143 AM CDT Thu Mar 25 2021

...FLASH FLOOD WARNING IS CANCELLED FOR WESTERN GEORGE, SOUTHWESTERN 
GREENE, SOUTHERN PERRY AND STONE COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

A Flash Flood Watch remains in effect until 100 AM CDT Friday for 
Portions of southwest Alabama. Portions of southeast Mississippi.

LAT...LON 3106 8915 3108 8863 3073 8873 3074 8888
      3068 8888 3068 8923 3065 8924 3065 8934
      3091 8934 3091 8914

$$

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 24, 8:15 PM CDT	Special Weather Statement	MOB	Stone	60 min
Mar 24, 9:17 PM CDT	Special Weather Statement	MOB	Stone	58 min
Mar 24, 11:13 PM CDT	Areal Flood Advisory	MOB	George, Greene	3 hr
Mar 25, 6:20 PM CDT	Severe Thunderstorm Warning	MOB	Wayne	40 min

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; radar from the NEXRAD Level II archive.