Alert archive / Tennessee / Flash Flood Warnings in 2013

Flash Flood Warning 25, NWS Huntsville, AL

July 21, 2013Franklin County, Moore County, Tennessee

NWS Huntsville, AL issued this flash flood warning at Jul 21, 2013, 2:36 PM CDT for Franklin County, Moore 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 counties it named.

The facts

Issued
Jul 21, 2013, 2:36 PM CDT (19:36 UTC)
Expired
Jul 21, 2013, 5:30 PM CDT
In force
3 hr
Issued by
NWS Huntsville, AL
Area
Storm-based polygon
Flood severity
None

Counties Franklin County, TN, Moore County, TN

The radar

The Northeast Alabama radar (KHTX), 35 km from the middle of the area, began a volume at 19:35 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

Nashville Metro, TN (KBNA), launched 12:00Z, 7.6 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 2013-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1985 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 12:00Z on 2013-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -45 square meters per square second.1939Sfc1 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
1985 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
606 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-45 m²/s²
0-3 km storm-relative helicity
-1 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 20, 7:59 PM CDTSpecial Weather StatementHUNLimestone46 min
Jul 21, 11:32 AM CDTSpecial Weather StatementHUNLauderdale43 min
Jul 21, 11:34 AM CDTSpecial Weather StatementHUNFranklin41 min
Jul 21, 11:56 AM CDTSpecial Weather StatementHUNJackson49 min
Jul 21, 12:05 PM CDTSevere Thunderstorm WarningHUNJackson, Marshall25 min
Jul 21, 12:52 PM CDTSpecial Weather StatementHUNLimestone38 min
Jul 21, 2:18 PM CDTSpecial Weather StatementHUNMadison27 min
Jul 21, 2:39 PM CDTSpecial Weather StatementHUNMadison36 min
Jul 21, 3:24 PM CDTSpecial Weather StatementHUNMarshall51 min
Jul 21, 3:37 PM CDTSpecial Weather StatementHUNColbert38 min
Jul 21, 5:32 PM CDTSpecial Weather StatementHUNLawrence28 min
Jul 21, 6:06 PM CDTSpecial Weather StatementHUNColbert39 min
Jul 21, 6:09 PM CDTSpecial Weather StatementHUNLawrence51 min
Jul 21, 6:16 PM CDTFlash Flood WarningHUNColbert3 hr
Jul 21, 11:39 AM CDTSpecial Weather StatementHUNFranklin51 min
Jul 21, 2:13 PM CDTSpecial Weather StatementHUNMoore47 min
Jul 21, 2:16 PM CDTSpecial Weather StatementHUNLincoln44 min
Jul 21, 2:44 PM CDTSpecial Weather StatementHUNFranklin46 min
Jul 21, 2:58 PM CDTSpecial Weather StatementHUNFranklin47 min
Jul 21, 3:28 PM CDTSpecial Weather StatementHUNFranklin47 min

Nearby

Flash Flood Warnings in Tennessee, 2013Every flash flood warning in 2013

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.