Alert archive / Mississippi / Flash Flood Warnings in 2021
Flash Flood Warning 71, NWS Memphis, TN
NWS Memphis, TN issued this flash flood warning at Jul 11, 2021, 5:09 AM CDT for Benton County, DeSoto County, Marshall County, Mississippi; Fayette County, Hardeman County, Shelby County, Tennessee. It was in force for 2 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
- Jul 11, 2021, 5:09 AM CDT (10:09 UTC)
- Expired
- Jul 11, 2021, 7:38 AM CDT
- In force
- 2 hr
- Issued by
- NWS Memphis, TN
- Area
- Storm-based polygon
- Flood severity
- None
Counties Benton County, MS, DeSoto County, MS, Marshall County, MS, Fayette County, TN, Hardeman County, TN, Shelby County, TN
The radar
The Memphis radar (KNQA), 47 km from the middle of the area, began a volume at 10:09 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 00:00Z, 10.2 hours before the alert went out and 44 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.
- Mixed-layer CAPE
- 1010 J/kg
- Mixed-layer CIN
- -36 J/kg
- Mixed-layer LCL
- 1462 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 106 m²/s²
- 0-3 km storm-relative helicity
- 115 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 4.9
The text
As transmitted.
144
WGUS54 KMEG 111009
FFWMEG
MSC009-033-093-TNC047-069-157-111315-
/O.NEW.KMEG.FF.W.0071.210711T1009Z-210711T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Memphis TN
509 AM CDT Sun Jul 11 2021
The National Weather Service in Memphis has issued a
* Flash Flood Warning for...
Northern Benton County in northeastern Mississippi...
Northeastern DeSoto County in northwestern Mississippi...
Northern Marshall County in northwestern Mississippi...
Fayette County in western Tennessee...
Southwestern Hardeman County in western Tennessee...
Southeastern Shelby County in western Tennessee...
* Until 815 AM CDT.
* At 509 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2 and 4 inches of rain
have fallen. Additional rainfall amounts up to 1 inch 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...
Southaven, Collierville, Germantown, Olive Branch, Horn Lake,
Memphis, Lamar, Lakeland, Arlington, Somerville, Byhalia, Mt
Pleasant, Slayden, Eads, Michigan City, Lagrange, Lewisburg,
Southeast Memphis, Canaan and Whitehaven.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3508 9007 3512 8972 3530 8968 3529 8963
3525 8919 3500 8902 3487 8902 3486 8902
3486 8934 3485 8935 3484 8975 3492 9008
FLASH FLOOD...RADAR INDICATED
$$1 follow-up statement
149
WGUS74 KMEG 111238
FFSMEG
Flash Flood Statement
National Weather Service Memphis TN
738 AM CDT Sun Jul 11 2021
MSC009-033-093-TNC047-069-157-111248-
/O.CAN.KMEG.FF.W.0071.000000T0000Z-210711T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Benton MS-DeSoto MS-Marshall MS-Fayette TN-Hardeman TN-Shelby TN-
738 AM CDT Sun Jul 11 2021
...FLASH FLOOD WARNING FOR NORTHERN BENTON, NORTHEASTERN DESOTO,
NORTHERN MARSHALL, FAYETTE, SOUTHWESTERN HARDEMAN AND SOUTHEASTERN
SHELBY COUNTIES HAS BEEN REPLACED WITH A FLOOD WARNING...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 3508 9007 3512 8972 3530 8968 3529 8964
3529 8963 3525 8919 3500 8902 3486 8902
3486 8934 3485 8935 3484 8975 3492 9008
$$The office that day
Everything else NWS Memphis, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 4:23 AM CDT | Special Weather Statement | MEG | Benton, Marshall | 37 min |
| Jul 11, 4:27 AM CDT | Areal Flood Advisory | MEG | DeSoto, Marshall, Tunica | 3 hr |
| Jul 11, 5:40 PM CDT | Special Weather Statement | MEG | Monroe | 35 min |
| Jul 11, 6:15 PM CDT | Special Weather Statement | MEG | Monroe | 30 min |
| Jul 10, 11:21 PM CDT | Special Weather Statement | MEG | Lake | 24 min |
| Jul 10, 11:46 PM CDT | Special Weather Statement | MEG | Dyer, Lake, Obion | 44 min |
| Jul 10, 11:55 PM CDT | Severe Thunderstorm Warning | MEG | Lauderdale, Tipton | 50 min |
| Jul 11, 12:24 AM CDT | Severe Thunderstorm Warning | MEG | Crockett, Fayette, Haywood, Lauderdale, Shelby, Tipton | 51 min |
| Jul 11, 12:28 AM CDT | Special Weather Statement | MEG | Dyer, Gibson, Lake, Obion, Weakley | 47 min |
| Jul 11, 1:09 AM CDT | Special Weather Statement | MEG | Carroll, Gibson, Henry, Weakley | 51 min |
| Jul 11, 1:13 AM CDT | Special Weather Statement | MEG | Crockett, Fayette, Haywood, Madison | 32 min |
| Jul 11, 1:18 AM CDT | Special Weather Statement | MEG | Shelby | 27 min |
| Jul 11, 2:52 AM CDT | Areal Flood Advisory | MEG | Shelby | 3 hr |
| Jul 11, 3:12 AM CDT | Flash Flood Warning | MEG | Shelby | 3 hr |
| Jul 11, 4:15 AM CDT | Areal Flood Advisory | MEG | Fayette, Hardeman | 3 hr |
Nearby
Flash Flood Warnings in Mississippi, 2021Flash Flood Warnings in Tennessee, 2021Every 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.