Alert archive / Mississippi / Flash Flood Warnings in 2021
Flash Flood Warning 68, NWS Memphis, TN
NWS Memphis, TN issued this flash flood warning at Jul 1, 2021, 4:20 PM CDT for DeSoto County, Mississippi; Shelby County, Tennessee. It was in force for 55 min. 1 report 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 1, 2021, 4:20 PM CDT (21:20 UTC)
- Expired
- Jul 1, 2021, 5:15 PM CDT
- In force
- 55 min
- Issued by
- NWS Memphis, TN
- Area
- Storm-based polygon
- Flood severity
- None
Counties DeSoto County, MS, Shelby County, TN
The radar
The Memphis radar (KNQA), 29 km from the middle of the area, began a volume at 21:19 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 1, 4:20 PM CDT | FLASH FLOOD | Downtown Memphis, TN | RIVERSIDE RAILROAD UNDERPASS BY CRUMP AND I-55 ROADWAY FLOODED. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Little Rock, AR (KLZK), launched 12:00Z, 9.3 hours before the alert went out and 29 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
- 808 J/kg
- Mixed-layer CIN
- -28 J/kg
- Mixed-layer LCL
- 949 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 55 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
562
WGUS54 KMEG 012120
FFWMEG
MSC033-TNC157-012215-
/O.NEW.KMEG.FF.W.0068.210701T2120Z-210701T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Memphis TN
420 PM CDT Thu Jul 1 2021
The National Weather Service in Memphis has issued a
* Flash Flood Warning for...
Northeastern DeSoto County in northwestern Mississippi...
Southeastern Shelby County in western Tennessee...
* Until 515 PM CDT.
* At 420 PM CDT, trained weather spotters reported thunderstorms
producing heavy rain across the warned area. Between 1 and 1.5
inches of rain have fallen. Additional rainfall amounts of 0.5 to
1.5 inches are possible in the warned area. Flash flooding is
already occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Trained spotters reported.
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...
Bartlett, Southaven, Collierville, Germantown, Olive Branch, Horn
Lake, Cordova, T O Fuller State Park, Memphis, Lakeland,
Arlington, Walls, Southeast Memphis, Midtown Memphis, Ellendale,
Whitehaven, Downtown Memphis, Southwest Memphis, Lynchburg and
Eads.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3512 9011 3512 9009 3514 9007 3515 9007
3516 9010 3519 9010 3528 8964 3500 8964
3500 8972 3498 8972 3488 9017
FLASH FLOOD...OBSERVED
$$1 follow-up statement
253
WGUS74 KMEG 012223
FFSMEG
Flash Flood Statement
National Weather Service Memphis TN
523 PM CDT Thu Jul 1 2021
MSC033-TNC157-012233-
/O.EXP.KMEG.FF.W.0068.000000T0000Z-210701T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DeSoto MS-Shelby TN-
523 PM CDT Thu Jul 1 2021
...FLASH FLOOD WARNING HAS EXPIRED FOR NORTHEASTERN DESOTO AND
SOUTHEASTERN SHELBY COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 3512 9011 3512 9009 3514 9007 3515 9007
3516 9010 3519 9010 3528 8964 3500 8964
3500 8972 3498 8972 3488 9017
$$The office that day
Everything else NWS Memphis, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 1, 4:09 PM CDT | Areal Flood Advisory | MEG | DeSoto | 11 min |
| Jul 1, 6:17 PM CDT | Special Weather Statement | MEG | DeSoto | 28 min |
| Jul 1, 6:18 PM CDT | Special Weather Statement | MEG | DeSoto | 27 min |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.