Alert archive / Alabama / Flash Flood Warnings in 1991

Flash Flood Warning 18, NWS Birmingham, AL

April 12, 1991Fayette County, Pickens County, Alabama

NWS Birmingham, AL issued this flash flood warning at Apr 12, 1991, 6:57 PM CDT for Fayette County, Pickens County, Alabama. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Apr 12, 1991, 6:57 PM CDT (23:57 UTC)
Expired
Apr 12, 1991, 9:00 PM CDT
In force
2 hr
Issued by
NWS Birmingham, AL
Area
Whole counties

Counties Fayette County, AL, Pickens County, AL

The nearest sounding before it

Centreville/Bibb, AL (KCKL), launched 12:00Z, 12.0 hours before the alert went out and 94 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, Centreville/Bibb, AL at 12:00Z on 1991-04-12Temperature 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, Centreville/Bibb, AL at 12:00Z on 1991-04-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 152 square meters per square second.193958Sfc1 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
1216 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
152 m²/s²
0-3 km storm-relative helicity
315 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

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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
Apr 12, 5:21 PM CDTSevere Thunderstorm WarningBMXColbert, Franklin, Lauderdale44 min

Nearby

Flash Flood Warnings in Alabama, 1991Every flash flood warning in 1991

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.