Alert archive / Tennessee / Flash Flood Warnings in 2021

Flash Flood Warning 19, NWS Memphis, TN

March 27, 2021Madison County, Tennessee

NWS Memphis, TN issued this flash flood warning at Mar 27, 2021, 5:14 AM CDT for Madison County, Tennessee. It was in force for 3 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: Mar 27, 2021, 5:14 AM CDT (10:14 UTC)
Expired: Mar 27, 2021, 8:15 AM CDT
In force: 3 hr
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Flood severity: None

County Madison County, TN

The radar

The Memphis radar (KNQA), 98 km from the middle of the area, began a volume at 10:14 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 137 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1500 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 117 m²/s²
0-3 km storm-relative helicity: 264 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

112 
WGUS54 KMEG 271014
FFWMEG
TNC113-271315-
/O.NEW.KMEG.FF.W.0019.210327T1014Z-210327T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Memphis TN
514 AM CDT Sat Mar 27 2021

The National Weather Service in Memphis has issued a

* Flash Flood Warning for...
  Northern Madison County in western Tennessee...

* Until 815 AM CDT.

* At 514 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 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...
  Jackson, Fairview, Three Way, Adair, Carroll, Westover, Gilmore, 
  Youngs Crossing, Windy City, Oakfield, Huntersville, Roberts, 
  Denmark, Leighton and Claybrook.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Excessive runoff from heavy rainfall will cause flooding of small 
creeks and streams, urban areas, highways, streets and underpasses 
as well as other drainage areas and low lying spots.

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 3579 8868 3572 8861 3549 8907 3567 8907
      3568 8905 3567 8902 3572 8895 3579 8883

FLASH FLOOD...RADAR INDICATED

$$

MGW

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 27, 2:44 AM CDT	Flash Flood Watch	MEG	Benton, Carroll, Chester, Crockett, Decatur, Dyer and 15 more	24 hr
Mar 27, 4:59 AM CDT	Special Weather Statement	MEG	Tipton	31 min
Mar 27, 5:06 AM CDT	Special Weather Statement	MEG	Carroll, Madison	24 min
Mar 27, 5:13 AM CDT	Flash Flood Warning	MEG	Shelby	3 hr
Mar 27, 5:20 AM CDT	Special Weather Statement	MEG	Shelby	40 min
Mar 27, 5:34 AM CDT	Severe Thunderstorm Warning	MEG	Shelby	41 min
Mar 27, 5:37 AM CDT	Special Weather Statement	MEG	Benton, Carroll	53 min
Mar 27, 5:56 AM CDT	Special Weather Statement	MEG	Fayette	49 min
Mar 27, 7:00 AM CDT	Special Weather Statement	MEG	Chester, Henderson, McNairy	30 min
Mar 27, 7:16 AM CDT	Special Weather Statement	MEG	Decatur, Hardin, Henderson	29 min
Mar 27, 9:01 AM CDT	Areal Flood Advisory	MEG	Fayette, Haywood, Shelby, Tipton	3 hr
Mar 27, 9:33 AM CDT	Flash Flood Warning	MEG	Chester, Decatur, Hardeman, Hardin, Henderson, McNairy	5 hr
Mar 27, 11:29 AM CDT	River Flood Warning	MEG	Fayette, Shelby	44 hr
Mar 27, 11:29 AM CDT	River Flood Warning	MEG	Madison	4 days
Mar 27, 11:29 AM CDT	River Flood Warning	MEG	Crockett, Dyer, Lauderdale	14 days
Mar 27, 11:29 AM CDT	River Flood Warning	MEG	Shelby	23 hr
Mar 27, 3:45 PM CDT	Special Weather Statement	MEG	Tipton	30 min
Mar 27, 3:50 PM CDT	Special Weather Statement	MEG	Madison	25 min
Mar 27, 4:05 PM CDT	Severe Thunderstorm Warning	MEG	Chester, Hardeman, Henderson, Madison	40 min
Mar 27, 4:15 PM CDT	Special Weather Statement	MEG	Lauderdale	30 min
Mar 27, 4:35 PM CDT	Tornado Warning	MEG	Chester, Decatur, Henderson	40 min
Mar 27, 5:05 PM CDT	Areal Flood Advisory	MEG	Chester, Henderson, Madison	3 hr
Mar 27, 5:08 PM CDT	Tornado Warning	MEG	Decatur, Henderson	22 min
Mar 27, 5:42 PM CDT	Tornado Warning	MEG	Lauderdale	48 min
Mar 27, 6:23 PM CDT	Tornado Warning Tornado observed	MEG	Lauderdale	52 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.