Alert archive / Alabama / Flash Flood Warnings in 2014

Flash Flood Warning 21, NWS Huntsville, AL

June 18, 2014Marshall County, Alabama

NWS Huntsville, AL issued this flash flood warning at Jun 18, 2014, 6:20 PM CDT for Marshall County, Alabama. It was in force for 115 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
Jun 18, 2014, 6:20 PM CDT (23:20 UTC)
Expired
Jun 18, 2014, 8:15 PM CDT
In force
115 min
Issued by
NWS Huntsville, AL
Area
Storm-based polygon
Flood severity
None

County Marshall County, AL

The radar

The Northeast Alabama radar (KHTX), 73 km from the middle of the area, began a volume at 23:20 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.

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 11.3 hours before the alert went out and 133 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, Birmingham, AL at 12:00Z on 2014-06-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1445 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, Birmingham, AL at 12:00Z on 2014-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -14 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
1445 J/kg
Mixed-layer CIN
-42 J/kg
Mixed-layer LCL
979 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-14 m²/s²
0-3 km storm-relative helicity
-9 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.

178 
WGUS54 KHUN 182320
FFWHUN
ALC095-190115-
/O.NEW.KHUN.FF.W.0021.140618T2320Z-140619T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HUNTSVILLE AL
620 PM CDT WED JUN 18 2014

THE NATIONAL WEATHER SERVICE IN HUNTSVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WEST CENTRAL MARSHALL COUNTY IN NORTHEAST ALABAMA...

* UNTIL 815 PM CDT
    
* AT 618 PM CDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING 
  HEAVY RAIN IN NORTHWESTERN MARSHALL COUNTY...BETWEEN ARAB AND 
  UNION GROVE. UP TO TWO INCHES OF RAIN HAVE ALREADY FALLEN IN THE 
  PAST HOUR...WITH AN ADDITIONAL INCH OF RAINFALL POSSIBLE THROUGH 
  815 PM CDT. 

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  ARAB...UNION GROVE AND EDDY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3430 8655 3443 8654 3443 8636 3430 8635

$$

12
1 follow-up statement
843 
WGUS74 KHUN 190032
FFSHUN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
732 PM CDT WED JUN 18 2014

ALC095-190041-
/O.CAN.KHUN.FF.W.0021.000000T0000Z-140619T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MARSHALL AL-
732 PM CDT WED JUN 18 2014

...THE FLASH FLOOD WARNING FOR WEST CENTRAL MARSHALL COUNTY IS
CANCELLED...

THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER EXPECTED TO POSE
A THREAT.

LAT...LON 3430 8655 3443 8654 3443 8636 3430 8635

$$

12

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 18, 12:28 PM CDTSpecial Weather StatementHUNMarshall32 min
Jun 18, 1:19 PM CDTSpecial Weather StatementHUNMarshall56 min
Jun 18, 1:24 PM CDTSpecial Weather StatementHUNDeKalb36 min
Jun 18, 3:19 PM CDTSpecial Weather StatementHUNDeKalb41 min
Jun 18, 3:42 PM CDTSpecial Weather StatementHUNJackson33 min
Jun 18, 3:51 PM CDTSpecial Weather StatementHUNCullman24 min
Jun 18, 4:35 PM CDTSpecial Weather StatementHUNMarshall25 min
Jun 18, 5:05 PM CDTSpecial Weather StatementHUNCullman25 min
Jun 18, 5:15 PM CDTSpecial Weather StatementHUNJackson15 min
Jun 18, 5:24 PM CDTSpecial Weather StatementHUNMarshall36 min
Jun 18, 5:56 PM CDTSpecial Weather StatementHUNMarshall34 min

Nearby

Flash Flood Warnings in Alabama, 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.