Alert archive / Alabama / Flash Flood Warnings in 1999

Flash Flood Warning 57, NWS Birmingham, AL

July 24, 1999Coosa County, Alabama

NWS Birmingham, AL issued this flash flood warning at Jul 24, 1999, 7:07 PM CDT for Coosa County, Alabama. It was in force for 2 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 24, 1999, 7:07 PM CDT (00:07 UTC)
Expired
Jul 24, 1999, 9:10 PM CDT
In force
2 hr
Issued by
NWS Birmingham, AL
Area
Whole counties

County Coosa County, AL

The radar

The Birmingham radar (KBMX), 55 km from the middle of the area, began a volume at 00:09 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

Birmingham, AL (KBMX), launched 00:00Z, 0.1 hours before the alert went out and 57 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 00:00Z on 1999-07-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2956 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, Birmingham, AL at 00:00Z on 1999-07-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -28 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
2956 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
1044 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
-28 m²/s²
0-3 km storm-relative helicity
-19 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.

000 
TTAA00 KBHM 250006
FFWBHM
ALC037-250210-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
707 PM CDT SAT JUL 24 1999

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A...

* FLASH FLOOD WARNING FOR...
  COOSA COUNTY... IN CENTRAL ALABAMA.

* UNTIL 910 PM CDT

* AT 703 PM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A CLUSTER OF THUNDERSTORMS WITH VERY HEAVY RAIN ACROSS MUCH OF
  COOSA COUNTY.  THE STORMS WERE NEARLY STATIONARY AND WILL
  CONTINUE TO PRODUCE HEAVY RAINFALL THE NEXT FEW HOURS.

* DOPPLER RADAR INDICATED BETWEEN 2 AND 3 INCHES OF RAIN HAS
  OCCURRED ACROSS COOSA COUNTY SINCE 530 PM CDT.

DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD!

AREA RESIDENTS SHOULD MONITOR FLOOD CONDITIONS... AND BE PREPARED
TO MOVE TO HIGHER GROUND... SHOULD FLOOD WATERS THREATEN. IF FLASH
FLOODING IS OBSERVED... ACT QUICKLY. MOVE TO HIGHER GROUND TO
ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN
WATER BEGINS RISING.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 24, 7:13 PM CDTSevere Thunderstorm WarningBMXLauderdale32 min
Jul 24, 7:22 PM CDTSevere Thunderstorm WarningBMXWinston48 min
Jul 24, 7:27 PM CDTSevere Thunderstorm WarningBMXPickens48 min
Jul 24, 7:33 PM CDTSevere Thunderstorm WarningBMXGreene62 min
Jul 24, 7:43 PM CDTSevere Thunderstorm WarningBMXTuscaloosa62 min
Jul 24, 7:45 PM CDTSevere Thunderstorm WarningBMXHale50 min
Jul 24, 8:24 PM CDTSevere Thunderstorm WarningBMXMontgomery51 min
Jul 24, 8:37 PM CDTSevere Thunderstorm WarningBMXBibb, Perry48 min
Jul 24, 8:39 PM CDTSevere Thunderstorm WarningBMXHale36 min
Jul 24, 8:44 PM CDTSevere Thunderstorm WarningBMXTuscaloosa36 min
Jul 24, 9:36 PM CDTSevere Thunderstorm WarningBMXBullock49 min
Jul 25, 6:29 PM CDTSevere Thunderstorm WarningBMXRandolph36 min
Jul 25, 6:46 PM CDTSevere Thunderstorm WarningBMXChambers64 min

Nearby

Flash Flood Warnings in Alabama, 1999Every flash flood warning in 1999

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.