Alert archive / Alabama / Flash Flood Warnings in 2002

Flash Flood Warning 29, NWS Birmingham, AL

August 20, 2002Montgomery County, Alabama

NWS Birmingham, AL issued this flash flood warning at Aug 20, 2002, 7:28 PM CDT for Montgomery County, Alabama. It was in force for 92 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
Aug 20, 2002, 7:28 PM CDT (00:28 UTC)
Expired
Aug 20, 2002, 9:00 PM CDT
In force
92 min
Issued by
NWS Birmingham, AL
Area
Whole counties

County Montgomery County, AL

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 0.5 hours before the alert went out and 119 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 2002-08-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3452 joules per kilogram.LCLEL10008507005003002001001 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 2002-08-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 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
3452 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
1210 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
47 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 
WGUS54 KBMX 210028
FFWBHM
ALC101-210200-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
727 PM CDT TUE AUG 20 2002

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MONTGOMERY COUNTY IN SOUTH CENTRAL ALABAMA

* UNTIL 900 PM CDT

* AT 722 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY 
RAIN OVER THE CITY OF MONTGOMERY...MOVING WEST AT 10 MPH.  

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE. IF YOUR VEHICLE STALLS...ABANDON IT IMMEDIATELY AND SEEK
HIGHER GROUND.
1 follow-up statement
000 
WGUS74 KBMX 210123
FFSBHM
ALC101-210200-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
823 PM CDT TUE AUG 20 2002

THE FLASH FLOOD WARNING FOR MONTGOMERY COUNTY HAS BEEN CANCELLED...
AT 823 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT
RAINFALL HAS DIMINISHED ACROSS MONTGOMERY COUNTY. REPORTS ACROSS THE
AREA SHOW THAT THE FLOODING THREAT IS OVER...THUS THE WARNING HAS
BEEN CANCELLED.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 20, 7:04 PM CDTSevere Thunderstorm WarningBMXChambers41 min
Aug 20, 7:12 PM CDTSevere Thunderstorm WarningBMXMontgomery, Pickens48 min
Aug 20, 7:13 PM CDTSevere Thunderstorm WarningBMXShelby47 min
Aug 20, 7:18 PM CDTSevere Thunderstorm WarningBMXCoosa57 min
Aug 20, 7:31 PM CDTSevere Thunderstorm WarningBMXChilton59 min
Aug 20, 7:43 PM CDTSevere Thunderstorm WarningBMXLowndes62 min
Aug 20, 8:11 PM CDTSevere Thunderstorm WarningBMXBibb34 min
Aug 20, 9:06 PM CDTSevere Thunderstorm WarningBMXDallas39 min
Aug 20, 9:23 PM CDTSevere Thunderstorm WarningBMXBarbour52 min
Aug 20, 9:34 PM CDTSevere Thunderstorm WarningBMXHale26 min
Aug 20, 9:38 PM CDTSevere Thunderstorm WarningBMXMarengo52 min
Aug 20, 9:59 PM CDTSevere Thunderstorm WarningBMXSumter46 min
Aug 20, 10:30 PM CDTSevere Thunderstorm WarningBMXBullock45 min
Aug 20, 10:49 PM CDTSevere Thunderstorm WarningBMXPike41 min

Nearby

Flash Flood Warnings in Alabama, 2002Every flash flood warning in 2002

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.