Alert archive / Arkansas / Flash Flood Warnings in 2021

Flash Flood Warning 4, NWS Memphis, TN

February 28, 2021Lauderdale County, Tennessee; Craighead County, Mississippi County, Poinsett County, Arkansas

NWS Memphis, TN issued this flash flood warning at Feb 28, 2021, 5:16 PM CST for Lauderdale County, Tennessee; Craighead County, Mississippi County, Poinsett County, Arkansas. 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: Feb 28, 2021, 5:16 PM CST (23:16 UTC)
Expired: Feb 28, 2021, 8:30 PM CST
In force: 3 hr
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Flood severity: None

Counties Craighead County, AR, Mississippi County, AR, Poinsett County, AR, Lauderdale County, TN

The radar

The Memphis radar (KNQA), 48 km from the middle of the area, began a volume at 23:20 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, 11.3 hours before the alert went out and 98 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.

553 
WGUS54 KMEG 282316
FFWMEG
ARC031-093-111-TNC097-010230-
/O.NEW.KMEG.FF.W.0004.210228T2316Z-210301T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Memphis has issued a

* Flash Flood Warning for...
  Southeastern Craighead County in eastern Arkansas...
  Central Mississippi County in eastern Arkansas...
  Eastern Poinsett County in eastern Arkansas...
  Northwestern Lauderdale County in western Tennessee...

* Until 830 PM CST.

* At 516 PM CST, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1.5 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...
  Blytheville, Osceola, Trumann, Marked Tree, Harrisburg, Lepanto, 
  Caraway, Luxora, Tyronza, Keiser, Dyess, Dell, Burdette, Marie, 
  Ashport, Little River, Etowah, Victoria, Three Way and Eastview.

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 3599 8974 3597 8972 3596 8971 3595 8970
      3584 8959 3567 8994 3552 9028 3544 9056
      3544 9057 3544 9061 3545 9061 3545 9062
      3560 9078 3561 9077

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...2-3 INCHES IN 3 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, 4:44 PM CST	Flash Flood Warning	MEG	Lake, Obion	5 hr
Feb 28, 5:34 PM CST	Severe Thunderstorm Warning	MEG	Lauderdale, Shelby, Tipton	41 min
Feb 28, 4:46 PM CST	Special Weather Statement	MEG	Cross	29 min
Feb 28, 4:56 PM CST	Severe Thunderstorm Warning	MEG	Crittenden, Cross, Poinsett	49 min

Nearby

Flash Flood Warnings in Arkansas, 2021 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.