Alert archive / Mississippi / Flash Flood Warnings in 2021

Flash Flood Warning 20, NWS Jackson, MS

May 9, 20214 counties in Mississippi

NWS Jackson, MS issued this flash flood warning at May 9, 2021, 10:24 PM CDT for 4 counties in Mississippi. It was in force for 86 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 9, 2021, 10:24 PM CDT (03:24 UTC)
Expired: May 9, 2021, 11:50 PM CDT
In force: 86 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Flood severity: None

Counties Holmes County, MS, Humphreys County, MS, Sharkey County, MS, Yazoo County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 90 km from the middle of the area, began a volume at 03:28 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 00:00Z, 3.4 hours before the alert went out and 83 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: 632 J/kg
Mixed-layer CIN: -123 J/kg
Mixed-layer LCL: 935 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 212 m²/s²
0-3 km storm-relative helicity: 205 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

As transmitted.

713 
WGUS54 KJAN 100324
FFWJAN
MSC051-053-125-163-100630-
/O.NEW.KJAN.FF.W.0020.210510T0324Z-210510T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Jackson MS
1024 PM CDT Sun May 9 2021

The National Weather Service in Jackson has issued a

* Flash Flood Warning for...
  Holmes County in central Mississippi...
  Humphreys County in central Mississippi...
  Northern Yazoo County in central Mississippi...
  Northeastern Sharkey County in west central Mississippi...

* Until 130 AM CDT.

* At 1024 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 4 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...
  Yazoo City, Durant, Belzoni, Thornton, Benton, Franklin, Tchula, 
  Lexington, Goodman, Pickens, Anguilla, Tolarville, Coxburg, 
  Howard, Brozville, Midnight, Ebenezer, Holly Bluff, Bowling Green 
  and Emory.

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 3277 9078 3297 9090 3308 9089 3310 9068
      3311 9068 3311 9070 3314 9070 3331 9010
      3321 8975 3319 8978 3311 8980 3311 8982
      3307 8982 3300 8988 3293 8990 3285 8999

FLASH FLOOD...RADAR INDICATED

$$

EC

1 follow-up statement

379 
WGUS74 KJAN 100450
FFSJAN

Flash Flood Statement
National Weather Service Jackson MS
1150 PM CDT Sun May 9 2021

MSC051-053-125-163-100500-
/O.CAN.KJAN.FF.W.0020.000000T0000Z-210510T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Holmes MS-Humphreys MS-Sharkey MS-Yazoo MS-
1150 PM CDT Sun May 9 2021

...FLASH FLOOD WARNING IS CANCELLED FOR HOLMES, HUMPHREYS, NORTHERN 
YAZOO AND NORTHEASTERN SHARKEY COUNTIES...

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

LAT...LON 3277 9078 3297 9090 3308 9089 3310 9068
      3311 9068 3311 9070 3314 9070 3331 9010
      3321 8975 3319 8978 3311 8980 3311 8982
      3307 8982 3300 8988 3293 8990 3285 8999

$$

EC

The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 7:32 PM CDT	Severe Thunderstorm Warning	JAN	Bolivar, Sunflower	73 min
May 9, 7:57 PM CDT	Severe Thunderstorm Warning	JAN	Clay, Webster	43 min
May 9, 8:21 PM CDT	Severe Thunderstorm Warning	JAN	Lowndes	28 min
May 9, 8:55 PM CDT	Special Weather Statement	JAN	Issaquena	35 min
May 9, 9:06 PM CDT	Severe Thunderstorm Warning	JAN	Issaquena, Sharkey, Washington	39 min
May 9, 9:36 PM CDT	Severe Thunderstorm Warning	JAN	Yazoo	37 min
May 9, 9:45 PM CDT	Severe Thunderstorm Warning	JAN	Issaquena, Sharkey	60 min
May 9, 10:12 PM CDT	Severe Thunderstorm Warning	JAN	Warren, Yazoo	62 min
May 9, 10:16 PM CDT	Severe Thunderstorm Warning	JAN	Holmes, Humphreys, Yazoo	35 min
May 9, 10:34 PM CDT	Flash Flood Warning	JAN	Carroll, Choctaw, Clay, Lowndes, Montgomery, Oktibbeha and 1 more	78 min
May 9, 10:38 PM CDT	Severe Thunderstorm Warning	JAN	Hinds, Madison, Rankin	82 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.