Alert archive / Mississippi / Flash Flood Warnings in 2021

Flash Flood Warning 38, NWS Jackson, MS

June 9, 2021Grenada County, Leflore County, Mississippi

NWS Jackson, MS issued this flash flood warning at Jun 9, 2021, 12:52 PM CDT for Grenada County, Leflore County, Mississippi. It was in force for 3 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: Jun 9, 2021, 12:52 PM CDT (17:52 UTC)
Expired: Jun 9, 2021, 3:45 PM CDT
In force: 3 hr
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Flood severity: None

Counties Grenada County, MS, Leflore County, MS

The radar

The Columbus AFB radar (KGWX), 165 km from the middle of the area, began a volume at 17:56 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

Little Rock, AR (KLZK), launched 12:00Z, 5.9 hours before the alert went out and 119 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: 1290 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 533 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 59 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

617 
WGUS54 KJAN 091752
FFWJAN
MSC043-083-092045-
/O.NEW.KJAN.FF.W.0038.210609T1752Z-210609T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Jackson MS
1252 PM CDT Wed Jun 9 2021

The National Weather Service in Jackson has issued a

* Flash Flood Warning for...
  Grenada County in north central Mississippi...
  Northern Leflore County in north central Mississippi...

* Until 345 PM CDT.

* At 1248 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain developing across the warned area. Between 1 and 3 
  inches of rain have fallen in some locations with these amounts 
  expected to spread east through mid afternoon. 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...
  Grenada, Leflore, Bew Springs, Holcomb, Elliott, Gore Springs, 
  Misterton, Minter City and Sunnyside.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Excessive runoff from heavy rainfall will cause flooding of small 
creeks and streams, urban areas, highways, streets and underpasses 
as well as other drainage areas and low lying spots.

&&

LAT...LON 3370 9045 3381 9045 3381 9018 3379 9017
      3377 9019 3375 9030 3372 9031 3370 9030
      3370 9027 3374 9024 3372 9022 3372 9014
      3381 9014 3382 8993 3390 8993 3390 8977
      3386 8977 3386 8951 3368 8951 3368 9013

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

$$

GRG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 8, 7:03 PM CDT	Flash Flood Warning	JAN	Grenada	117 min
Jun 8, 9:58 PM CDT	Severe Thunderstorm Warning	JAN	Choctaw, Oktibbeha	62 min
Jun 8, 11:12 PM CDT	Flash Flood Warning	JAN	Bolivar, Sunflower	3 hr
Jun 9, 1:27 AM CDT	Flash Flood Warning	JAN	Grenada	3 hr
Jun 9, 4:03 AM CDT	Flash Flood Watch	JAN	Attala, Bolivar, Carroll, Choctaw, Clay, Grenada and 14 more	39 hr
Jun 9, 10:07 AM CDT	River Flood Warning	JAN	Yazoo	18 days
Jun 9, 10:26 AM CDT	River Flood Warning	JAN	Clay	4 days
Jun 9, 11:50 AM CDT	Flash Flood Warning	JAN	Bolivar, Sunflower	3 hr
Jun 9, 2:01 PM CDT	Flash Flood Warning	JAN	Bolivar, Leflore, Sunflower, Washington	3 hr
Jun 9, 2:30 PM CDT	Severe Thunderstorm Warning	JAN	Issaquena, Sharkey	45 min
Jun 9, 2:36 PM CDT	Special Weather Statement	JAN	Kemper	24 min
Jun 9, 2:41 PM CDT	Special Weather Statement	JAN	Attala, Holmes	49 min
Jun 9, 2:56 PM CDT	Severe Thunderstorm Warning	JAN	Kemper, Noxubee	49 min
Jun 9, 3:01 PM CDT	Special Weather Statement	JAN	Yazoo	29 min
Jun 9, 3:05 PM CDT	Severe Thunderstorm Warning	JAN	Attala, Holmes, Leake, Madison, Neshoba, Winston	40 min
Jun 9, 3:26 PM CDT	Severe Thunderstorm Warning	JAN	Yazoo	33 min
Jun 9, 3:44 PM CDT	Special Weather Statement	JAN	Leake	31 min
Jun 9, 3:58 PM CDT	Special Weather Statement	JAN	Holmes	32 min
Jun 9, 4:18 PM CDT	Special Weather Statement	JAN	Leake	27 min
Jun 9, 4:48 PM CDT	Special Weather Statement	JAN	Holmes, Humphreys	27 min
Jun 9, 5:11 PM CDT	Severe Thunderstorm Warning	JAN	Newton, Scott	20 min
Jun 9, 5:26 PM CDT	Severe Thunderstorm Warning	JAN	Issaquena, Sharkey, Yazoo	49 min
Jun 9, 6:10 PM CDT	Special Weather Statement	JAN	Jasper	50 min
Jun 9, 6:26 PM CDT	Special Weather Statement	JAN	Warren	34 min
Jun 9, 6:34 PM CDT	Severe Thunderstorm Warning	JAN	Hinds, Warren	41 min
Jun 9, 6:59 PM CDT	Special Weather Statement	JAN	Clarke	46 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.