Alert archive / Alabama / Flash Flood Warnings in 1999

Flash Flood Warning 51, NWS Birmingham, AL

July 7, 1999Autauga County, Alabama

NWS Birmingham, AL issued this flash flood warning at Jul 7, 1999, 4:54 PM CDT for Autauga County, Alabama. It was in force for 61 min. 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 7, 1999, 4:54 PM CDT (21:54 UTC)
Expired
Jul 7, 1999, 5:55 PM CDT
In force
61 min
Issued by
NWS Birmingham, AL
Area
Whole counties

County Autauga County, AL

The radar

The Birmingham radar (KBMX), 72 km from the middle of the area, began a volume at 21:53 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, 9.9 hours before the alert went out and 73 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 1999-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1095 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 12:00Z on 1999-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 107 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
1095 J/kg
Mixed-layer CIN
-59 J/kg
Mixed-layer LCL
581 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
107 m²/s²
0-3 km storm-relative helicity
101 m²/s²
Significant tornado parameter
0.3
Supercell composite
3.3

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 8:26 PM CDTFlash Flood WarningBMXColbert, Lauderdale2 hr
Jul 7, 2:30 PM CDTFlash Flood WarningBMXJefferson, Shelby90 min
Jul 7, 2:48 PM CDTFlash Flood WarningBMXCoosa, Tallapoosa87 min
Jul 7, 3:18 PM CDTFlash Flood WarningBMXAutauga92 min
Jul 7, 4:46 PM CDTSevere Thunderstorm WarningBMXCleburne44 min
Jul 7, 4:56 PM CDTSevere Thunderstorm WarningBMXHale, Perry49 min
Jul 7, 5:22 PM CDTTornado WarningBMXMarengo, Perry48 min
Jul 7, 6:00 PM CDTSevere Thunderstorm WarningBMXMarengo, Sumter45 min
Jul 7, 6:07 PM CDTSevere Thunderstorm WarningBMXCalhoun48 min
Jul 7, 6:11 PM CDTSevere Thunderstorm WarningBMXFayette, Walker49 min
Jul 7, 6:17 PM CDTSevere Thunderstorm WarningBMXDeKalb48 min
Jul 7, 6:57 PM CDTSevere Thunderstorm WarningBMXJackson48 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.