Alert archive / Mississippi / Flash Flood Warnings in 2021

Flash Flood Warning 9, NWS Mobile, AL

April 10, 2021George County, Perry County, Stone County, Mississippi

NWS Mobile, AL issued this flash flood warning at Apr 10, 2021, 5:16 AM CDT for George County, Perry County, Stone County, Mississippi. It was in force for 4 hr. 2 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: Apr 10, 2021, 5:16 AM CDT (10:16 UTC)
Expired: Apr 10, 2021, 8:46 AM CDT
In force: 4 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

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

The radar

The Mobile radar (KMOB), 74 km from the middle of the area, began a volume at 10:16 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
Apr 10, 5:50 AM CDT	FLASH FLOOD	3 S Rogers Lake, MS	WATER COVERING ROADWAYS NEAR RIDGE RD & ORIEASE LADNER RD.
Apr 10, 6:00 AM CDT	FLASH FLOOD	1 Nw Wlox Tv Station To, MS	WATER COVERING ROADWAYS NEAR WIRE RD & EVANS 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, 10.3 hours before the alert went out and 90 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: 2977 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 599 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 243 m²/s²
0-3 km storm-relative helicity: 269 m²/s²
Significant tornado parameter: 3.4
Supercell composite: 18.1

Open this sounding in Storm Lab

The text

As transmitted.

221 
WGUS54 KMOB 101016
FFWMOB
MSC039-111-131-101615-
/O.NEW.KMOB.FF.W.0009.210410T1016Z-210410T1615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
516 AM CDT Sat Apr 10 2021

The National Weather Service in Mobile has issued a

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

* Until 1115 AM CDT.

* At 516 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 3 and 5 inches of rain 
  have fallen. 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...
  Wiggins, Lucedale, Perkinston, McHenry, Ramsey Springs, Deep 
  Creek, Whites Crossing, Big Level, Benndale, Barbara, Dale, Ten 
  Mile, Avent, Bond, Perry, Crossroads, Merrill, Bexley, Texas and 
  Evanston.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3100 8914 3099 8847 3075 8865 3073 8869
      3074 8888 3068 8888 3068 8890 3068 8923
      3065 8924 3065 8934 3091 8932 3091 8914

FLASH FLOOD...RADAR INDICATED

$$

1 follow-up statement

528 
WGUS74 KMOB 101346
FFSMOB

Flash Flood Statement
National Weather Service Mobile AL
846 AM CDT Sat Apr 10 2021

MSC039-111-131-101356-
/O.CAN.KMOB.FF.W.0009.000000T0000Z-210410T1615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
George MS-Perry MS-Stone MS-
846 AM CDT Sat Apr 10 2021

...FLASH FLOOD WARNING IS CANCELLED FOR GEORGE, 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.

LAT...LON 3100 8914 3099 8847 3075 8865 3073 8869
      3074 8888 3068 8888 3068 8890 3068 8923
      3065 8924 3065 8934 3091 8932 3091 8914

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 10, 1:06 AM CDT	Severe Thunderstorm Warning	MOB	Wayne	54 min
Apr 10, 1:15 AM CDT	Severe Thunderstorm Warning	MOB	Greene, Perry, Wayne	45 min
Apr 10, 1:58 AM CDT	Severe Thunderstorm Warning	MOB	Greene, Perry, Wayne	62 min
Apr 10, 2:35 AM CDT	Severe Thunderstorm Warning	MOB	George, Greene	25 min
Apr 10, 2:43 AM CDT	Severe Thunderstorm Warning	MOB	George	17 min
Apr 10, 2:59 AM CDT	Severe Thunderstorm Warning	MOB	George	61 min
Apr 10, 3:11 AM CDT	Severe Thunderstorm Warning	MOB	George, Stone	37 min
Apr 10, 4:07 AM CDT	Areal Flood Advisory	MOB	George	3 hr
Apr 10, 4:31 AM CDT	Areal Flood Advisory	MOB	George, Perry, Stone	3 hr
Apr 10, 5:53 AM CDT	Flash Flood Warning	MOB	George	6 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; radar from the NEXRAD Level II archive.