Alert archive / Alabama / Flash Flood Warnings in 2020

Flash Flood Warning 21, NWS Huntsville, AL

August 26, 2020Franklin County, Alabama

NWS Huntsville, AL issued this flash flood warning at Aug 26, 2020, 7:17 AM CDT for Franklin County, Alabama. It was in force for 3 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 26, 2020, 7:17 AM CDT (12:17 UTC)
Expired: Aug 26, 2020, 10:15 AM CDT
In force: 3 hr
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Emergency: Flash flood emergency
Damage threat: Catastrophic
Flood severity: None

County Franklin County, AL

The radar

The Columbus AFB radar (KGWX), 73 km from the middle of the area, began a volume at 12:20 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.

What was reported inside it

Time	Report	Where	Remark
Aug 26, 8:30 AM CDT	FLASH FLOOD	Hodges, AL	THE ROADWAY AT AL 172 AND LOVETT LN WAS WASHED OUT DUE TO FLASH FLOODING.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 0.3 hours before the alert went out and 171 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: 1453 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 714 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 20 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

876 
WGUS54 KHUN 261217
FFWHUN
ALC059-261515-
/O.NEW.KHUN.FF.W.0021.200826T1217Z-200826T1515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Huntsville AL
Issued by National Weather Service Jackson MS
717 AM CDT Wed Aug 26 2020

...FLASH FLOOD EMERGENCY FOR SOUTH-CENTRAL FRANKLIN COUNTY...

The National Weather Service in Huntsville has issued a

* Flash Flood Warning for...
  Franklin AL County in northwestern Alabama...

* Until 1015 AM CDT.

* At 717 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 3 and 6 inches of rain 
  have fallen. Flash flooding is ongoing or expected to begin 
  shortly.

  This is a FLASH FLOOD EMERGENCY for south-central Franklin County. 
  This is a PARTICULARLY DANGEROUS SITUATION. SEEK HIGHER GROUND NOW!

  HAZARD...Life threatening flash flooding. Thunderstorms
           producing flash flooding.

  SOURCE...Doppler radar.

  IMPACT...This is a PARTICULARLY DANGEROUS SITUATION. SEEK
           HIGHER GROUND NOW! Life threatening flash flooding of
           low water crossings, small creeks and streams, urban
           areas, highways, streets and underpasses.

* Some locations that will experience flash flooding include...
  Russellville, Red Bay, Phil Campbell, Belgreen, Vina, Hodges, 
  Little Bear Creek Reservoir, Duketon, Dempsey, Rockwood, Cedar 
  Creek Reservoir, Atwood, Isbell, Spruce Pine, Halltown and 
  Tharptown.

Additional rainfall amounts of 1 to 2 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to higher ground now! This is an extremely dangerous and 
life-threatening situation. Do not attempt to travel unless you are 
fleeing an area subject to flooding or under an evacuation order.

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

&&

LAT...LON 3432 8817 3449 8815 3454 8779 3455 8760
      3452 8759 3434 8767 3431 8775

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CATASTROPHIC

$$

DC

2 follow-up statements

079 
WGUS74 KHUN 261311
FFSHUN

Flash Flood Statement
National Weather Service Huntsville AL
Issued by National Weather Service Jackson MS
811 AM CDT Wed Aug 26 2020

ALC059-261515-
/O.CON.KHUN.FF.W.0021.000000T0000Z-200826T1515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Franklin AL AL-
811 AM CDT Wed Aug 26 2020

...FLASH FLOOD EMERGENCY FOR SOUTH-CENTRAL FRANKLIN COUNTY...

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 AM CDT THIS 
MORNING FOR FRANKLIN AL COUNTY...

At 809 AM CDT, emergency management reported roads closed and trees 
downed from flash flooding in south-central Franklin County. Between 
4 and 7 inches of rain have fallen. Flash flooding is already 
occurring.

This is a FLASH FLOOD EMERGENCY for south-central Franklin County. 
This is a PARTICULARLY DANGEROUS SITUATION. SEEK HIGHER GROUND NOW!

HAZARD...Life threatening flash flooding. Thunderstorms producing
         flash flooding.

SOURCE...Emergency management.

IMPACT...This is a PARTICULARLY DANGEROUS SITUATION. SEEK HIGHER
         GROUND NOW! Life threatening flash flooding of low water
         crossings, small creeks and streams, urban areas,
         highways, streets and underpasses.

Some locations that will experience flash flooding include...
  Russellville, Red Bay, Phil Campbell, Belgreen, Vina, Hodges, 
  Little Bear Creek Reservoir, Duketon, Dempsey, Rockwood, Cedar 
  Creek Reservoir, Atwood, Isbell, Spruce Pine, Halltown and 
  Tharptown.

Additional rainfall amounts of 1 to 2 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to higher ground now! This is an extremely dangerous and 
life-threatening situation. Do not attempt to travel unless you are 
fleeing an area subject to flooding or under an evacuation order.

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

&&

LAT...LON 3432 8817 3449 8815 3454 8779 3455 8760
      3452 8759 3434 8767 3431 8775

FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CATASTROPHIC

$$

DC

879 
WGUS74 KHUN 261511
FFSHUN

Flash Flood Statement
National Weather Service Huntsville AL
1011 AM CDT Wed Aug 26 2020

ALC059-261521-
/O.EXP.KHUN.FF.W.0021.000000T0000Z-200826T1515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Franklin AL AL-
1011 AM CDT Wed Aug 26 2020

...FLASH FLOOD WARNING WILL EXPIRE AT 1015 AM CDT THIS MORNING FOR 
FRANKLIN AL COUNTY IN NORTHWESTERN ALABAMA...

The heavy rain has ended. Flooding is still ongoing and an areal 
flooding warning is in effect until 1145 am. Please continue to heed 
remaining road closures.

LAT...LON 3432 8817 3449 8815 3454 8779 3455 8760
      3452 8759 3434 8767 3431 8775

$$

GH

The office that day

Everything else NWS Huntsville, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 26, 4:01 AM CDT	Special Weather Statement	HUN	Colbert, Franklin	44 min
Aug 26, 5:13 AM CDT	Special Weather Statement	HUN	Lawrence	47 min
Aug 26, 5:57 AM CDT	Flash Flood Warning	HUN	Franklin, Lawrence	3 hr
Aug 26, 6:04 AM CDT	Special Weather Statement	HUN	Lawrence	41 min
Aug 26, 6:38 AM CDT	Special Weather Statement	HUN	Franklin	52 min
Aug 26, 6:49 AM CDT	Special Weather Statement	HUN	Lawrence, Limestone	41 min
Aug 26, 7:35 AM CDT	Special Weather Statement	HUN	Franklin	40 min
Aug 26, 7:36 AM CDT	Special Weather Statement	HUN	Madison	39 min
Aug 26, 8:52 AM CDT	Areal Flood Warning	HUN	Colbert, Franklin, Lawrence	3 hr

Nearby

Flash Flood Warnings in Alabama, 2020 Every flash flood warning in 2020

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.