Alert archive / Alabama / Flash Flood Warnings in 1999

Flash Flood Warning 33, NWS Birmingham, AL

June 27, 1999Autauga County, Lowndes County, Alabama

NWS Birmingham, AL issued this flash flood warning at Jun 27, 1999, 4:09 PM CDT for Autauga County, Lowndes County, Alabama. It was in force for 96 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
Jun 27, 1999, 4:09 PM CDT (21:09 UTC)
Expired
Jun 27, 1999, 5:45 PM CDT
In force
96 min
Issued by
NWS Birmingham, AL
Area
Whole counties

Counties Autauga County, AL, Lowndes County, AL

The radar

The Maxwell AFB radar (KMXX), 83 km from the middle of the area, began a volume at 21:13 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, 9.2 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, Birmingham, AL at 12:00Z on 1999-06-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 429 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 1999-06-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 184 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
429 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
519 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
184 m²/s²
0-3 km storm-relative helicity
203 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KBHM 272114
FFWBHM

ALC001-085-272245-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
409 PM CDT SUN JUN 27 1999

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

* FLASH FLOOD WARNING FOR...
  AUTAUGA COUNTY... IN CENTRAL ALABAMA.
  LOWNDES COUNTY... IN CENTRAL ALABAMA.

* UNTIL 545 PM CDT.

* AT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SHOWERS AND
  THUNDERSTORMS WITH VERY HEAVY RAIN ACROSS MOST OF AUTAUGA AND
  LOWNDES COUNTIES.  COUNTY ROAD 70 HAS BEEN REPORTED CLOSED IN AUTAUGA
  COUNTY.

* 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
Jun 27, 12:49 PM CDTFlash Flood WarningBMXElmore, Macon, Tallapoosa3 hr
Jun 27, 1:13 PM CDTFlash Flood WarningBMXAutauga3 hr
Jun 27, 2:42 PM CDTFlash Flood WarningBMXBullock, Montgomery93 min
Jun 27, 2:57 PM CDTFlash Flood WarningBMXBlount, St. Clair78 min
Jun 27, 2:57 PM CDTFlash Flood WarningBMXCalhoun78 min
Jun 27, 3:21 PM CDTFlash Flood WarningBMXBarbour, Pike94 min
Jun 27, 4:47 PM CDTFlash Flood WarningBMXBarbour, Pike2 hr

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.