Alert archive / Tennessee / Flash Flood Warnings in 2019

Flash Flood Warning 21, NWS Huntsville, AL

August 7, 2019Franklin County, Lincoln County, Moore County, Tennessee; Jackson County, Madison County, Alabama

NWS Huntsville, AL issued this flash flood warning at Aug 7, 2019, 4:12 PM CDT for Franklin County, Lincoln County, Moore County, Tennessee; Jackson County, Madison County, Alabama. 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
Aug 7, 2019, 4:12 PM CDT (21:12 UTC)
Expired
Aug 7, 2019, 7:15 PM CDT
In force
3 hr
Issued by
NWS Huntsville, AL
Area
Storm-based polygon
Flood severity
None

Counties Jackson County, AL, Madison County, AL, Franklin County, TN, Lincoln County, TN, Moore County, TN

The radar

The Northeast Alabama radar (KHTX), 53 km from the middle of the area, began a volume at 21:17 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

Nashville Metro, TN (KBNA), launched 12:00Z, 9.2 hours before the alert went out and 107 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-pSkew-T log-p diagram, Nashville Metro, TN at 12:00Z on 2019-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 387 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 12:00Z on 2019-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 151 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
387 J/kg
Mixed-layer CIN
-124 J/kg
Mixed-layer LCL
929 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
151 m²/s²
0-3 km storm-relative helicity
185 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

The text

As transmitted.

069 
WGUS54 KHUN 072112
FFWHUN
ALC071-089-TNC051-103-127-080015-
/O.NEW.KHUN.FF.W.0021.190807T2112Z-190808T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Huntsville AL
412 PM CDT Wed Aug 7 2019

The National Weather Service in Huntsville Alabama has issued a

* Flash Flood Warning for...
  Northwestern Jackson County in northeastern Alabama...
  Northern Madison County in north central Alabama...
  Central Moore County in Middle Tennessee...
  Lincoln County in Middle Tennessee...
  Southwestern Franklin County in Middle Tennessee...

* Until 715 PM CDT.

* At 410 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across much of Lincoln, northern madison, and western 
  portions of Jackson, Franklin and Moore Counties. Up to one inch 
  of rain has fallen in less than 30 minutes, and additional 
  rainfall amounts of 1 to 2 inches are possible through 715 PM CDT. 
  Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Northern Huntsville, Fayetteville, Moores Mill, Meridianville,
  Lynchburg, Hazel Green, Ardmore, Huntland, Gurley and Petersburg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3535 8654 3536 8650 3517 8629 3477 8615
      3466 8643 3495 8678 3499 8678 3499 8684
      3526 8683 3525 8675 3531 8668 3533 8660
      3536 8660 3537 8659

$$

12
1 follow-up statement
352 
WGUS74 KHUN 080014
FFSHUN

Flash Flood Statement
National Weather Service Huntsville AL
714 PM CDT Wed Aug 7 2019

ALC071-089-TNC051-103-127-080024-
/O.EXP.KHUN.FF.W.0021.000000T0000Z-190808T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Jackson AL-Madison AL-Moore TN-Lincoln TN-Franklin TN-
714 PM CDT Wed Aug 7 2019

...THE FLASH FLOOD WARNING FOR NORTHWESTERN JACKSON...NORTHERN
MADISON...CENTRAL MOORE...LINCOLN AND SOUTHWESTERN FRANKLIN COUNTIES
WILL EXPIRE AT 715 PM CDT...

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

LAT...LON 3535 8654 3536 8650 3517 8629 3477 8615
      3466 8643 3495 8678 3499 8678 3499 8684
      3526 8683 3525 8675 3531 8668 3533 8660
      3536 8660 3537 8659

$$

30

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 6, 9:41 PM CDTSpecial Weather StatementHUNFranklin, Lincoln, Moore49 min
Aug 7, 1:35 PM CDTSpecial Weather StatementHUNMoore25 min
Aug 7, 1:42 PM CDTSevere Thunderstorm WarningHUNLincoln, Moore23 min
Aug 7, 1:48 PM CDTSpecial Weather StatementHUNLincoln27 min
Aug 7, 2:10 PM CDTSpecial Weather StatementHUNFranklin, Lincoln, Moore50 min
Aug 7, 2:20 PM CDTSevere Thunderstorm WarningHUNFranklin, Lincoln, Moore25 min
Aug 7, 3:55 PM CDTSevere Thunderstorm WarningHUNLincoln35 min
Aug 6, 11:24 PM CDTSpecial Weather StatementHUNLimestone, Madison51 min
Aug 7, 12:36 AM CDTSpecial Weather StatementHUNColbert39 min
Aug 7, 12:43 AM CDTSevere Thunderstorm WarningHUNColbert, Lauderdale47 min
Aug 7, 1:12 AM CDTSevere Thunderstorm WarningHUNColbert, Franklin, Lauderdale, Lawrence48 min
Aug 7, 1:55 AM CDTAreal Flood WarningHUNColbert, Lauderdale3 hr
Aug 7, 1:58 AM CDTSpecial Weather StatementHUNFranklin, Lawrence47 min
Aug 7, 2:18 PM CDTSpecial Weather StatementHUNMarshall27 min
Aug 7, 3:04 PM CDTSpecial Weather StatementHUNMadison26 min
Aug 7, 3:32 PM CDTSpecial Weather StatementHUNDeKalb43 min
Aug 7, 3:47 PM CDTSpecial Weather StatementHUNColbert43 min
Aug 7, 3:50 PM CDTSevere Thunderstorm WarningHUNColbert, Lauderdale25 min
Aug 7, 4:19 PM CDTSpecial Weather StatementHUNJackson41 min
Aug 7, 4:28 PM CDTFlash Flood WarningHUNColbert, Lauderdale3 hr
Aug 7, 4:38 PM CDTSpecial Weather StatementHUNColbert52 min
Aug 7, 4:58 PM CDTSpecial Weather StatementHUNLimestone, Madison47 min
Aug 7, 5:37 PM CDTSevere Thunderstorm WarningHUNLimestone, Madison, Morgan38 min
Aug 7, 5:55 PM CDTSpecial Weather StatementHUNLawrence50 min
Aug 7, 6:01 PM CDTSpecial Weather StatementHUNFranklin44 min
Aug 7, 6:13 PM CDTSpecial Weather StatementHUNCullman, Marshall, Morgan47 min

Nearby

Flash Flood Warnings in Tennessee, 2019Flash Flood Warnings in Alabama, 2019Every flash flood warning in 2019

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.