Alert archive / Mississippi / Flash Flood Warnings in 2021

Flash Flood Warning 15, NWS Mobile, AL

April 24, 2021Greene County, Perry County, Mississippi

NWS Mobile, AL issued this flash flood warning at Apr 24, 2021, 3:26 AM CDT for Greene County, Perry County, Mississippi. It was in force for 5 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: Apr 24, 2021, 3:26 AM CDT (08:26 UTC)
Expired: Apr 24, 2021, 8:15 AM CDT
In force: 5 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

Counties Greene County, MS, Perry County, MS

The radar

The Mobile radar (KMOB), 83 km from the middle of the area, began a volume at 08:30 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

Slidell Radar S, LA (KSIL), launched 00:00Z, 8.4 hours before the alert went out and 148 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: 873 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 156 m²/s²
0-3 km storm-relative helicity: 263 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

583 
WGUS54 KMOB 240826
FFWMOB
MSC041-111-241315-
/O.NEW.KMOB.FF.W.0015.210424T0826Z-210424T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
326 AM CDT Sat Apr 24 2021

The National Weather Service in Mobile has issued a

* Flash Flood Warning for...
  Greene County in southeastern Mississippi...
  Central Perry County in southeastern Mississippi...

* Until 815 AM CDT.

* At 326 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 4 inches of rain 
  have fallen. The expected rainfall rate is 1 to 2 inches in 1 
  hour. 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...
  Leakesville, Beaumont, New Augusta, McLain, State Line, Byrd, 
  Neely, Avera, Bothwell, Little Creek, Sand Hill, Hintonville, 
  Bradley, Progress, Jonathan, Piave, Ferguson, McSwain, Hillman and 
  Wingate.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3143 8861 3144 8846 3118 8844 3100 8915
      3129 8915

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

$$

Black

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 23, 7:48 PM CDT	Flash Flood Watch	MOB	George, Greene, Perry, Stone, Wayne	17 hr
Apr 23, 9:00 PM CDT	Special Weather Statement	MOB	George, Greene, Stone	45 min
Apr 23, 9:44 PM CDT	Special Weather Statement	MOB	Wayne	46 min
Apr 23, 11:09 PM CDT	Special Weather Statement	MOB	Perry	51 min
Apr 24, 1:12 AM CDT	Severe Thunderstorm Warning	MOB	Greene, Perry	63 min
Apr 24, 2:10 AM CDT	Severe Thunderstorm Warning	MOB	Greene, Perry	65 min
Apr 24, 2:23 AM CDT	Areal Flood Advisory	MOB	Greene, Perry	3 hr
Apr 24, 3:10 AM CDT	Severe Thunderstorm Warning	MOB	Greene	65 min
Apr 24, 3:48 AM CDT	Areal Flood Advisory	MOB	Greene	4 hr
Apr 24, 3:49 AM CDT	Severe Thunderstorm Warning	MOB	George, Greene, Perry, Stone	41 min
Apr 24, 4:25 AM CDT	Severe Thunderstorm Warning	MOB	George, Greene, Wayne	50 min
Apr 24, 4:27 AM CDT	Tornado Warning	MOB	Greene	13 min
Apr 24, 5:14 AM CDT	Severe Thunderstorm Warning	MOB	George	46 min
Apr 24, 9:42 AM CDT	River Flood Warning	MOB	George, Greene, Wayne	21 days
Apr 24, 9:44 AM CDT	River Flood Warning	MOB	George, Greene, Perry	6 days
Apr 24, 9:46 AM CDT	River Flood Warning	MOB	George, Greene, Jackson	21 days
Apr 24, 3:43 PM CDT	Areal Flood Warning	MOB	Greene, Wayne	2 hr
Apr 24, 3:59 PM CDT	Severe Thunderstorm Warning	MOB	Wayne	46 min
Apr 24, 5:20 PM CDT	Severe Thunderstorm Warning	MOB	George, Greene	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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.