Alert archive / Alabama / Flash Flood Warnings in 2005

Flash Flood Warning 21, NWS Huntsville, AL

July 12, 2005Jackson County, Alabama

NWS Huntsville, AL issued this flash flood warning at Jul 12, 2005, 10:38 PM CDT for Jackson 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: Jul 12, 2005, 10:38 PM CDT (03:38 UTC)
Expired: Jul 13, 2005, 1:45 AM CDT
In force: 3 hr
Issued by: NWS Huntsville, AL
Area: Counties, with a storm outline in the text

County Jackson County, AL

The radar

The Northeast Alabama radar (KHTX), 10 km from the middle of the area, began a volume at 03:39 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, 3.6 hours before the alert went out and 151 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: 29 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 1355 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 119 m²/s²
0-3 km storm-relative helicity: 201 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KHUN 130340
FFWHUN
ALC071-130645-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HUNTSVILLE AL
1038 PM CDT TUE JUL 12 2005

THE NATIONAL WEATHER SERVICE IN HUNTSVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  JACKSON COUNTY IN NORTHEAST ALABAMA

* UNTIL 145 AM CDT

* AT 1034 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR            
  THE LAST IN A SERIES OF VERY HEAVY RAIN PRODUCING THUNDERSTORMS 15 
  MILES WEST OF SKYLINE. THE THUNDERSTORMS WERE MOVING EAST AT 15 
MPH.
  RAINFALL OF 1 TO 3 INCHES HAS FALLEN IN ABOUT 90 MINUTES ACROSS    
  WESTERN JACKSON COUNTY BETWEEN PRINCETON AND TRENTON...WITH        
  ADDITIONAL ONE HALF TO ONE INCH LIKELY IN THE NEXT 30 MINUTES.

* SOME LOCATIONS AFFECTED INCLUDE BUT ARE NOT LIMITED TO...
  BRIDGEPORT...HOLLYWOOD...SKYLINE AND STEVENSON

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

THIS AREA OF STORMS HAS A HISTORY OF PRODUCING FLASH FLOODING IN 
EASTERN MADISON COUNTY NEAR GURLEY.

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS
FLOODED ROADS. FIND ALTERNATE ROUTES. IT ONLY TAKES A FEW INCHES OF
SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.

LAT...LON 3492 8630 3470 8629 3470 8580 3497 8563

$$

KULA

1 follow-up statement

000 
WGUS74 KHUN 130610
FFSHUN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
110 AM CDT WED JUL 13 2005

ALC071-130615-
JACKSON AL-
110 AM CDT WED JUL 13 2005

...THE FLASH FLOOD WARNING FOR JACKSON COUNTY HAS BEEN CANCELLED...

AT 110 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT THERE WAS NO MORE SIGNIFICANT RAINFALL MOVING TOWARD THE WARNED 
AREA IN WEST CENTRAL JACKSON COUNTY. ALSO...AS OF 1 AM THE 
SCOTTSBORO 911 CENTER AND THE SHERIFF HAVE HAD NO REPORTS OF 
FLOODING PROBLEMS FROM THE AREA. THEREFORE...THE FLASH FLOOD WARNING
HAS BEEN CANCELLED.

LAT...LON 3492 8630 3470 8629 3470 8580 3497 8563

$$

SCHAUB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 7:58 PM CDT	Severe Thunderstorm Warning	HUN	Jackson	47 min
Jul 12, 8:48 PM CDT	Flash Flood Warning	HUN	Limestone, Madison	3 hr

Nearby

Flash Flood Warnings in Alabama, 2005 Every flash flood warning in 2005

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.