Alert archive / Tennessee / Flash Flood Warnings in 2014

Flash Flood Warning 13, NWS Huntsville, AL

April 30, 2014Franklin County, Tennessee

NWS Huntsville, AL issued this flash flood warning at Apr 30, 2014, 1:08 AM CDT for Franklin 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 outline as issued.

The facts

Issued
Apr 30, 2014, 1:08 AM CDT (06:08 UTC)
Expired
Apr 30, 2014, 4:15 AM CDT
In force
3 hr
Issued by
NWS Huntsville, AL
Area
Storm-based polygon
Flood severity
None

County Franklin County, TN

The radar

The Northeast Alabama radar (KHTX), 32 km from the middle of the area, began a volume at 06:09 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 00:00Z, 6.1 hours before the alert went out and 112 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 00:00Z on 2014-04-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 00:00Z on 2014-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 square meters per square second.1939587897117136Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1345 m above ground
0-6 km bulk shear
74 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
380 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

405 
WGUS54 KHUN 300608
FFWHUN
TNC051-300915-
/O.NEW.KHUN.FF.W.0013.140430T0608Z-140430T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HUNTSVILLE AL
108 AM CDT WED APR 30 2014

THE NATIONAL WEATHER SERVICE IN HUNTSVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  FRANKLIN COUNTY IN MIDDLE TENNESSEE...

* UNTIL 415 AM CDT
    
* AT 107 AM CDT...DOPPLER RADAR INDICATED NUMEROUS HEAVY 
  THUNDERSTORMS TRAINING OVER THE WARNING AREA AND PRODUCING 
  TORRENTIAL RAINFALL RATES OF 1 TO 3 INCHES PER HOUR. FLASH 
  FLOODING IS EXPECTED TO BEGIN RAPIDLY AS THE GROUND REMAINS 
  SATURATED.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  WINCHESTER...DECHERD...ESTILL SPRINGS...COWAN...MONTEAGLE...
  HUNTLAND...TIMS FORD LAKE...SEWANEE...MAXWELL AND BEANS CREEK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 3534 8603 3531 8600 3532 8598 3528 8591
      3522 8586 3500 8586 3499 8632 3513 8631
      3514 8632 3536 8613

$$

70/DD

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 29, 7:00 PM CDTSpecial Weather StatementHUNLincoln, Moore45 min

Nearby

Flash Flood Warnings in Tennessee, 2014Every flash flood warning in 2014

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.