Alert archive / Mississippi / Flash Flood Warnings in 2021

Flash Flood Warning 69, NWS Jackson, MS

July 25, 2021Hinds County, Madison County, Mississippi

NWS Jackson, MS issued this flash flood warning at Jul 25, 2021, 9:26 PM CDT for Hinds County, Madison County, Mississippi. It was in force for 91 min. 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: Jul 25, 2021, 9:26 PM CDT (02:26 UTC)
Expired: Jul 25, 2021, 10:57 PM CDT
In force: 91 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Flood severity: None

Counties Hinds County, MS, Madison County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 21 km from the middle of the area, began a volume at 02:29 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
Jul 25, 9:40 PM CDT	FLASH FLOOD	2 Sse Tougaloo, MS	SEVERAL INCHES OF WATER COVERING RESIDENTIAL ROAD AND PONDING OCCURRING IN YARDS.
Jul 25, 9:45 PM CDT	FLASH FLOOD	2 Sse Tougaloo, MS	WATER APPROACHING A HOUSE - SEVERAL INCHES OF WATER IN FRONT OF THE HOUSE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 2.4 hours before the alert went out and 11 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: 1454 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 1491 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: -6 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

520 
WGUS54 KJAN 260226
FFWJAN
MSC049-089-260430-
/O.NEW.KJAN.FF.W.0069.210726T0226Z-210726T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Jackson MS
926 PM CDT Sun Jul 25 2021

The National Weather Service in Jackson has issued a

* Flash Flood Warning for...
  East Central Hinds County in central Mississippi...
  Southwestern Madison County in central Mississippi...

* Until 1130 PM CDT.

* At 926 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2.5 inches of 
  rain have fallen in the past hour. 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...
  Jackson.

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 3243 9017 3241 9010 3235 9012 3236 9023

FLASH FLOOD...RADAR INDICATED

$$

19

1 follow-up statement

443 
WGUS74 KJAN 260357
FFSJAN

Flash Flood Statement
National Weather Service Jackson MS
1057 PM CDT Sun Jul 25 2021

MSC049-089-260407-
/O.CAN.KJAN.FF.W.0069.000000T0000Z-210726T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hinds MS-Madison MS-
1057 PM CDT Sun Jul 25 2021

...FLASH FLOOD WARNING IS CANCELLED FOR EAST CENTRAL HINDS AND 
SOUTHWESTERN MADISON COUNTIES...

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

LAT...LON 3243 9017 3241 9010 3235 9012 3236 9023

$$

19

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 26, 2:54 PM CDT	Heat Advisory	JAN	Adams, Attala, Bolivar, Carroll, Choctaw, Claiborne and 31 more	28 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.