Alert archive / Alabama / Flash Flood Warnings in 1990

Flash Flood Warning 9, NWS Birmingham, AL

February 15, 1990Shelby County, Alabama

NWS Birmingham, AL issued this flash flood warning at Feb 15, 1990, 4:35 PM CST for Shelby County, Alabama. It was in force for 115 min.

The area

The counties it named.

The facts

Issued
Feb 15, 1990, 4:35 PM CST (22:35 UTC)
Expired
Feb 15, 1990, 6:30 PM CST
In force
115 min
Issued by
NWS Birmingham, AL
Area
Whole counties

County Shelby County, AL

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Centreville/Bibb, AL (KCKL), launched 12:00Z, 10.6 hours before the alert went out and 64 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 1990-02-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 8 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, Centreville/Bibb, AL at 12:00Z on 1990-02-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 257 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
8 J/kg
Mixed-layer CIN
-132 J/kg
Mixed-layer LCL
608 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
257 m²/s²
0-3 km storm-relative helicity
402 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 
TTAA00 KBHM 152237
FFWBHM
ALC117-160030-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
435 PM CST THU FEB 15 1990
 
THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  630 PM CST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTH ALABAMA
 
   ...SHELBY COUNTY
 
AT 435 PM CST FLOODING WAS REPORTED IN ALABASTER. WATER WAS UP TO THE
DOORS OF SOME BUSINESSES. FLOODING IS ALSO REPORTED ON BUCK CREEK IN
ALABASTER AND ALONG HIGHWAY 31.
 
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
THE DANGERS OF FLOODS AND FLASH FLOODS.  IF FLASH FLOODING IS
OBSERVED...ACT QUICKLY.  MOVE UP 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
Feb 15, 2:58 PM CSTSevere Thunderstorm WarningBMXGreene, Hale47 min
Feb 15, 3:07 PM CSTTornado WarningBMXGreene38 min
Feb 15, 3:26 PM CSTSevere Thunderstorm WarningBMXTuscaloosa64 min
Feb 15, 4:06 PM CSTFlash Flood WarningBMXBibb, Tuscaloosa2 hr
Feb 15, 4:45 PM CSTFlash Flood WarningBMXGreene, Hale3 hr
Feb 15, 5:17 PM CSTFlash Flood WarningBMXJefferson3 hr

Nearby

Flash Flood Warnings in Alabama, 1990Every flash flood warning in 1990

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.