Alert archive / Tennessee / Flash Flood Warnings in 2021
Flash Flood Warning 78, NWS Memphis, TN
NWS Memphis, TN issued this flash flood warning at Aug 15, 2021, 1:24 PM CDT for Hardin County, Tennessee. It was in force for 4 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
- Aug 15, 2021, 1:24 PM CDT (18:24 UTC)
- Expired
- Aug 15, 2021, 5:30 PM CDT
- In force
- 4 hr
- Issued by
- NWS Memphis, TN
- Area
- Storm-based polygon
- Flood severity
- None
County Hardin County, TN
The radar
The Columbus AFB radar (KGWX), 136 km from the middle of the area, began a volume at 18:25 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
Nashville Metro, TN (KBNA), launched 12:00Z, 6.4 hours before the alert went out and 173 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
- 152 J/kg
- Mixed-layer CIN
- -98 J/kg
- Mixed-layer LCL
- 697 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 23 m²/s²
- 0-3 km storm-relative helicity
- 36 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
884
WGUS54 KMEG 151824
FFWMEG
TNC071-152130-
/O.NEW.KMEG.FF.W.0078.210815T1824Z-210815T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Memphis TN
124 PM CDT Sun Aug 15 2021
The National Weather Service in Memphis has issued a
* Flash Flood Warning for...
Southeastern Hardin County in western Tennessee...
* Until 430 PM CDT.
* At 124 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2 and 4 inches of rain
have fallen. Additional rainfall amounts of 2 to 4 inches 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...
Walnut Grove, Lowryville and Pollards Mill.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3501 8798 3501 8816 3512 8814 3514 8806
3521 8798 3517 8798 3513 8798 3505 8798
FLASH FLOOD...RADAR INDICATED
$$2 follow-up statements
827
WGUS54 KMEG 152046
FFWMEG
TNC071-152230-
/O.EXT.KMEG.FF.W.0078.000000T0000Z-210815T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Memphis TN
346 PM CDT Sun Aug 15 2021
The National Weather Service in Memphis has extended the
* Flash Flood Warning for...
Southeastern Hardin County in western Tennessee...
* Until 530 PM CDT.
* At 346 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 3 and 5 inches of rain
have fallen. The expected rainfall rate is 1 to 3 inches in 2
hours. Additional rainfall amounts of 2 to 4 inches are possible
in the warned area. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Walnut Grove, Lowryville and Pollards Mill.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3501 8798 3501 8816 3512 8814 3514 8806
3521 8798 3517 8798 3513 8798 3505 8798
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-3 INCHES IN 2 HOURS
$$781
WGUS74 KMEG 152230
FFSMEG
Flash Flood Statement
National Weather Service Memphis TN
530 PM CDT Sun Aug 15 2021
TNC071-152240-
/O.EXP.KMEG.FF.W.0078.000000T0000Z-210815T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hardin TN-
530 PM CDT Sun Aug 15 2021
...FLASH FLOOD WARNING HAS EXPIRED FOR SOUTHEASTERN HARDIN COUNTY...
Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.
LAT...LON 3501 8798 3501 8816 3512 8814 3514 8806
3521 8798 3517 8798 3513 8798 3505 8798
$$The office that day
Everything else NWS Memphis, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 15, 12:41 PM CDT | Areal Flood Advisory | MEG | Hardin | 43 min |
| Aug 15, 1:26 PM CDT | Areal Flood Advisory | MEG | Hardin | 4 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.