Alert archive / Alabama / Tornado Warnings in 2001

Tornado Warning 21, NWS Birmingham, AL

March 12, 2001Autauga County, Lowndes County, Alabama

NWS Birmingham, AL issued this tornado warning at Mar 12, 2001, 11:25 AM CST for Autauga County, Lowndes County, Alabama. It was in force for 35 min. No storm report in the archive falls 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.

The facts

Issued
Mar 12, 2001, 11:25 AM CST (17:25 UTC)
Expired
Mar 12, 2001, 12:00 PM CST
In force
35 min
Issued by
NWS Birmingham, AL
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Autauga County, AL, Lowndes County, AL

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 5.4 hours before the alert went out and 92 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 2001-03-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 18 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 2001-03-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 129 square meters per square second.1939587897Sfc1 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
18 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
625 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
129 m²/s²
0-3 km storm-relative helicity
397 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.

394 
WFUS54 KBMX 121726
TORBHM
ALC001-085-121800-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1125 AM CST MON MAR 12 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* TORNADO WARNING FOR...
  AUTAUGA COUNTY IN ALABAMA
  NORTHERN LOWNDES COUNTY IN ALABAMA

* UNTIL NOON CST

* AT 1122 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO 13 MILES SOUTHWEST OF WHITE HALL...MOVING EAST AT 50 MPH.

* LOCATIONS NEAR THE PATH OF THIS TORNADO INCLUDE...WHITE HALL...
PRATTVILLE AND AUTAUGAVILLE.

IF YOU ARE NEAR THE PATH OF THIS STORM...TAKE COVER NOW. MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR. ABANDON MOBILE HOMES AND VEHICLES
FOR MORE SUBSTANTIAL SHELTER. AVOID WINDOWS.

LAT...LON 3236 8683 3219 8688 3226 8642 3234 8651
          3243 8641 3261 8642

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 12, 10:49 AM CSTSevere Thunderstorm WarningBMXDallas41 min
Mar 12, 11:03 AM CSTTornado WarningBMXDallas27 min
Mar 12, 11:48 AM CSTFlash Flood WarningBMXDallas117 min
Mar 12, 12:01 PM CSTTornado WarningBMXAutauga, Elmore, Montgomery59 min
Mar 12, 12:47 PM CSTFlash Flood WarningBMXAutauga, Elmore, Lowndes, Montgomery118 min

Nearby

Tornado Warnings in Alabama, 2001Every tornado warning in 2001Tornadoes in 2001

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.