Alert archive / Alabama / Tornado Warnings in 1999

Tornado Warning 71, NWS Birmingham, AL

August 25, 1999Dallas County, Alabama

NWS Birmingham, AL issued this tornado warning at Aug 25, 1999, 4:11 PM CDT for Dallas County, Alabama. It was in force for 34 min. 1 report came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued
Aug 25, 1999, 4:11 PM CDT (21:11 UTC)
Expired
Aug 25, 1999, 4:45 PM CDT
In force
34 min
Issued by
NWS Birmingham, AL
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Dallas County, AL

The radar

The Birmingham radar (KBMX), 111 km from the middle of the area, began a volume at 21:15 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.

What was reported inside it

TimeReportWhereRemark
Aug 25, 4:45 PM CDTThunderstorm Wind 55Minter, ALSeveral trees and power lines were blown down in Minter.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 9.2 hours before the alert went out and 112 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 1999-08-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 648 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 1999-08-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 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
648 J/kg
Mixed-layer CIN
-73 J/kg
Mixed-layer LCL
787 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
74 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBMX 252112 RRA
TORBHM
ALC047-252145-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
411 PM CDT WED AUG 25 1999

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

* TORNADO WARNING FOR...
  SOUTHERN DALLAS COUNTY IN SOUTH CENTRAL ALABAMA.

* UNTIL 445 PM CDT.

* AT 406 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM WITH A DEVELOPING TORNADO 6 MILES SOUTH OF ORRVILLE...OR
  ABOUT 16 MILES SOUTHWEST OF SELMONT-WEST SELMONT...MOVING EAST AT
  15 MPH.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOURR HEAD WITH YOUR HANDS.

LAT...LON 3232 8726 3215 8732 3205 8696 3226 8689

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Aug 25, 10:21 AM CDT, 5 hours 50 minutes before
ALZ001>050-GAZ089-090-102-120-261400-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1021 AM CDT WED AUG 25 1999

THE ALABAMA FOREST COMMISSION HAS ISSUED A FIRE ALERT TODAY FOR MOST
OF NORTHWEST AND WEST-CENTRAL ALABAMA.

RADAR SHOWED A LARGE AREA OF RAIN...AND SCATTERED THUNDERSTORMS MOVING
OVER PORTIONS OF CENTRAL ALABAMA THIS MORNING.  A COLD FRONT STRETCHED
FROM NEAR NASHVILLE TO MEMPHIS TO SHREVEPORT AND A MOIST AND UNSTABLE
AIRMASS AHEAD OF THIS FRONT IS TRIGGERING THE THUNDERSTORM ACTIVITY.

THE COLD FRONT IS EXPECTED TO SLOWLY MOVE OVER THE NORTHERN ALABAMA THIS
AFTERNOON AND INTO SOUTH ALABAMA TONIGHT. SHOWERS AND THUNDERSTORMS ARE
EXPECTED TO DEVELOP ALONG...AND AHEAD OF THE COLD FRONT AS IT MOVES
THROUGH THE STATE.  A FEW OF THE STORMS MAY BECOME SEVERE PRODUCING
DAMAGING WINDS AND HAIL.

EMERGING MANAGEMENT OFFICIALS AND STORM SPOTTERS MAY NEED TO BE
ACTIVATED THIS AFTERNOON IN NORTH ALABAMA AND THIS EVENING AND TONIGHT
IN SOUTH ALABAMA.  IN ADDITION...THE PUBLIC IS REQUESTED TO EXERCISE
CAUTION DURING THE FIRE DANGER PERIOD AND TO HELP PREVENT FOREST AND
GRASS FIRES.

THE HAZARDOUS WEATHER OUTLOOK FOR SOUTHWEST ALABAMA...
SEE PRODUCT BHMSPSMOB. FOR SOUTHEAST ALABAMA...LOOK AT MIASPSTLH.  FOR
MORE WEATHER INFORMATION VISIT OUR INTERNET SITE ON THE WORLD WIDE WEB
AT http://www.aces.edu/nws/

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 25, 2:20 PM CDTSevere Thunderstorm WarningBMXPike35 min
Aug 25, 3:30 PM CDTSevere Thunderstorm WarningBMXHale, Marengo30 min
Aug 25, 4:43 PM CDTTornado WarningBMXDallas32 min
Aug 25, 5:11 PM CDTSevere Thunderstorm WarningBMXMarengo34 min
Aug 25, 6:37 PM CDTSevere Thunderstorm WarningBMXEtowah48 min

Nearby

Tornado Warnings in Alabama, 1999Every tornado warning in 1999Tornadoes 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.