Alert archive / Tennessee / Flash Flood Warnings in 2021

Flash Flood Warning 3, NWS Memphis, TN

February 28, 2021Lake County, Obion County, Tennessee

NWS Memphis, TN issued this flash flood warning at Feb 28, 2021, 4:44 PM CST for Lake County, Obion County, Tennessee. It was in force for 5 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: Feb 28, 2021, 4:44 PM CST (22:44 UTC)
Expired: Feb 28, 2021, 9:45 PM CST
In force: 5 hr
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Flood severity: None

Counties Lake County, TN, Obion County, TN

The radar

The Paducah radar (KPAH), 77 km from the middle of the area, began a volume at 22:43 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 12:00Z, 10.7 hours before the alert went out and 193 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: 448 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 525 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 396 m²/s²
0-3 km storm-relative helicity: 396 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

As transmitted.

107 
WGUS54 KMEG 282244
FFWMEG
TNC095-131-010145-
/O.NEW.KMEG.FF.W.0003.210228T2244Z-210301T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Memphis TN
444 PM CST Sun Feb 28 2021

The National Weather Service in Memphis has issued a

* Flash Flood Warning for...
  Southeastern Lake County in western Tennessee...
  Northwestern Obion County in western Tennessee...

* Until 745 PM CST.

* At 444 PM CST, 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...
  Union City, Ridgely, Hornbeak, Woodland Mills, Samburg, Fremont, 
  Old Fremont, Crystal, Roneys Store, Lassiter Corner and Madie.

Additional rainfall amounts of 2 to 3 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 3622 8954 3627 8949 3651 8919 3651 8918
      3650 8916 3650 8912 3650 8910 3650 8908
      3650 8904 3650 8899 3650 8897 3650 8890
      3650 8889

FLASH FLOOD...RADAR INDICATED

$$

JDS

1 follow-up statement

478 
WGUS54 KMEG 010133
FFWMEG
TNC095-131-010345-
/O.EXT.KMEG.FF.W.0003.000000T0000Z-210301T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Memphis TN
733 PM CST Sun Feb 28 2021

The National Weather Service in Memphis has extended the

* Flash Flood Warning for...
  Southeastern Lake County in western Tennessee...
  Northwestern Obion County in western Tennessee...

* Until 945 PM CST.

* At 733 PM CST, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 4 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...
  Union City, Ridgely, Hornbeak, Woodland Mills, Samburg, Fremont, 
  Old Fremont, Crystal, Roneys Store, Lassiter Corner and Madie.

Additional rainfall amounts of 2 to 3 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 3622 8954 3627 8949 3651 8919 3651 8918
      3650 8916 3650 8912 3650 8910 3650 8908
      3650 8904 3650 8899 3650 8897 3650 8890
      3650 8889

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 2 HOURS 

$$

The office that day

Everything else NWS Memphis, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 27, 6:37 PM CST	Special Weather Statement	MEG	Decatur	23 min
Feb 27, 9:03 PM CST	Dense Fog Advisory	MEG	Benton, Carroll, Chester, Crockett, Decatur, Dyer and 15 more	7 hr
Feb 28, 11:47 AM CST	River Flood Warning	MEG	Obion, Weakley	65 hr
Feb 28, 11:49 AM CST	River Flood Warning	MEG	Dyer, Gibson, Obion	7 days
Feb 28, 11:50 AM CST	River Flood Advisory	MEG	Decatur, Perry	5 days
Feb 28, 3:15 PM CST	Severe Thunderstorm Warning	MEG	Dyer, Lake	33 min
Feb 28, 3:37 PM CST	Flash Flood Warning	MEG	Lake, Obion	2 hr
Feb 28, 4:37 PM CST	Flash Flood Warning	MEG	Dyer, Lake, Obion, Weakley	5 hr
Feb 28, 5:16 PM CST	Flash Flood Warning	MEG	Lauderdale	3 hr
Feb 28, 5:34 PM CST	Severe Thunderstorm Warning	MEG	Lauderdale, Shelby, Tipton	41 min

Nearby

Flash Flood Warnings in Tennessee, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.