Alert archive / Tennessee / Flash Flood Warnings in 2021
Flash Flood Warning 9, NWS Memphis, TN
NWS Memphis, TN issued this flash flood warning at Mar 17, 2021, 11:38 AM CDT for Shelby County, Tipton County, Tennessee. It was in force for 3 hr. 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
- Mar 17, 2021, 11:38 AM CDT (16:38 UTC)
- Expired
- Mar 17, 2021, 2:45 PM CDT
- In force
- 3 hr
- Issued by
- NWS Memphis, TN
- Area
- Storm-based polygon
- Flood severity
- None
Counties Shelby County, TN, Tipton County, TN
The radar
The Memphis radar (KNQA), 7 km from the middle of the area, began a volume at 16:40 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 |
|---|---|---|---|
| Mar 17, 2:00 PM CDT | FLASH FLOOD | 1 N Millington, TN | LARGE AREA FLOODED INCLUDING ROADS IN QUITO ESTATES SUBDIVISION IN MILLINGTON. |
| Mar 17, 2:00 PM CDT | FLASH FLOOD | 3 Sw Munford, TN | WATSON ROAD CLOSED DUE TO HIGH WATER. |
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, 4.6 hours before the alert went out and 63 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
- 18 J/kg
- Mixed-layer CIN
- -262 J/kg
- Mixed-layer LCL
- 1466 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 217 m²/s²
- 0-3 km storm-relative helicity
- 186 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted.
144
WGUS54 KMEG 171638
FFWMEG
TNC157-167-171945-
/O.NEW.KMEG.FF.W.0009.210317T1638Z-210317T1945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Memphis TN
1138 AM CDT Wed Mar 17 2021
The National Weather Service in Memphis has issued a
* Flash Flood Warning for...
North Central Shelby County in western Tennessee...
Central Tipton County in western Tennessee...
* Until 245 PM CDT.
* At 1138 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2 and 3 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...
Millington, Covington, Meeman Shelby Forest State Park, Munford,
Brighton, Dixonville, Tipton, Atoka, Gilt Edge, Burlison, Garland,
Crosstown, Egypt, Beaver, Akins Corner, Kerrville, Wilkinsville,
Drummonds, Idaville and Quito.
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.
A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.
&&
LAT...LON 3561 8969 3561 8956 3553 8948 3531 8993
3525 9010 3525 9014 3527 9016 3529 9016
3531 9011 3534 9011
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 3 HOURS
$$1 follow-up statement
875
WGUS74 KMEG 171943
FFSMEG
Flash Flood Statement
National Weather Service Memphis TN
243 PM CDT Wed Mar 17 2021
TNC157-167-171952-
/O.EXP.KMEG.FF.W.0009.000000T0000Z-210317T1945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Tipton TN-Shelby TN-
243 PM CDT Wed Mar 17 2021
...THE FLASH FLOOD WARNING FOR CENTRAL TIPTON AND NORTH CENTRAL
SHELBY COUNTIES WILL EXPIRE AT 245 PM CDT...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.
Additional rain later today may warrant a new flash flood warning.
LAT...LON 3561 8969 3561 8956 3553 8948 3531 8993
3525 9010 3525 9014 3527 9016 3529 9016
3531 9011 3534 9011
$$
TLSJrThe office that day
Everything else NWS Memphis, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 17, 6:49 AM CDT | Severe Thunderstorm Warning | MEG | Fayette | 14 min |
| Mar 17, 9:04 AM CDT | Flash Flood Warning | MEG | Fayette, Hardeman, McNairy | 3 hr |
| Mar 17, 12:24 PM CDT | Special Weather Statement | MEG | Shelby | 36 min |
| Mar 17, 12:31 PM CDT | Special Weather Statement | MEG | Tipton | 29 min |
| Mar 17, 1:18 PM CDT | Severe Thunderstorm Warning | MEG | Chester, Fayette, Hardeman, Haywood, Madison, Tipton | 42 min |
| Mar 17, 1:54 PM CDT | Flash Flood Warning | MEG | Shelby | 3 hr |
| Mar 17, 1:58 PM CDT | Severe Thunderstorm Warning | MEG | Chester, Decatur, Hardeman, Henderson, Madison | 47 min |
| Mar 17, 5:26 PM CDT | River Flood Warning | MEG | Crockett, Dyer, Lauderdale | 15 hr |
Nearby
Flash 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.