Alert archive / Alabama / Flash Flood Warnings in 2021

Flash Flood Warning 17, NWS Tallahassee, FL

July 15, 2021Geneva County, Houston County, Alabama

NWS Tallahassee, FL issued this flash flood warning at Jul 15, 2021, 3:32 PM CDT for Geneva County, Houston County, Alabama. It was in force for 81 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 15, 2021, 3:32 PM CDT (20:32 UTC)
Expired: Jul 15, 2021, 4:53 PM CDT
In force: 81 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon
Flood severity: None

Counties Geneva County, AL, Houston County, AL

The radar

The Ft Rucker radar (KEOX), 24 km from the middle of the area, began a volume at 20:35 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

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 8.5 hours before the alert went out and 146 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: 977 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 911 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 6 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

868 
WGUS52 KTAE 152032
FFWTAE
ALC061-069-152230-
/O.NEW.KTAE.FF.W.0017.210715T2032Z-210715T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tallahassee FL
332 PM CDT Thu Jul 15 2021

The National Weather Service in Tallahassee has issued a

* Flash Flood Warning for...
  Northeastern Geneva County in southeastern Alabama...
  Northern Houston County in southeastern Alabama...

* Until 530 PM CDT.

* At 332 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 inches of rain 
  have fallen in the last 1 Hour. The expected rainfall rate is 1 to 
  2 inches in 1 hour. 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...
  Dothan, Taylor, Midland City, Kinsey, Ashford, Slocomb, Cowarts, 
  Webb, Malvern, Rehobeth, Avon, Memphis, Ardilla, Wilson Mill, 
  Smyrna, Olympia Spa Resort, Green Acres, Jones Crossroads and 
  Kelly Springs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3125 8564 3127 8560 3125 8554 3125 8549
      3129 8549 3129 8542 3132 8542 3131 8517
      3114 8514 3109 8562

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

$$

42-DVD

1 follow-up statement

158 
WGUS72 KTAE 152153
FFSTAE

Flash Flood Statement
National Weather Service Tallahassee FL
453 PM CDT Thu Jul 15 2021

ALC061-069-152203-
/O.CAN.KTAE.FF.W.0017.000000T0000Z-210715T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Geneva AL-Houston AL-
453 PM CDT Thu Jul 15 2021

...FLASH FLOOD WARNING IS CANCELLED FOR NORTHEASTERN GENEVA AND 
NORTHERN HOUSTON COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

LAT...LON 3125 8564 3127 8560 3125 8554 3125 8549
      3129 8549 3129 8542 3132 8542 3131 8517
      3114 8514 3109 8562

$$

DVD

The office that day

Everything else NWS Tallahassee, FL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 15, 12:58 PM CDT	Special Weather Statement	TAE	Henry	32 min
Jul 15, 1:40 PM CDT	Special Weather Statement	TAE	Henry	35 min
Jul 15, 1:41 PM CDT	Special Weather Statement	TAE	Dale	34 min
Jul 15, 2:43 PM CDT	Special Weather Statement	TAE	Houston	47 min
Jul 15, 3:26 PM CDT	Areal Flood Advisory	TAE	Geneva, Houston	64 min
Jul 15, 3:43 PM CDT	Special Weather Statement	TAE	Geneva, Houston	47 min
Jul 15, 4:35 PM CDT	Special Weather Statement	TAE	Geneva	40 min
Jul 15, 5:19 PM CDT	Areal Flood Advisory	TAE	Geneva	3 hr

Nearby

Flash Flood Warnings in Alabama, 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.