Alert archive / Alabama / Tornado Warnings in 1998

Tornado Warning 80, NWS Birmingham, AL

April 18, 1998Lowndes County, Alabama

NWS Birmingham, AL issued this tornado warning at Apr 18, 1998, 7:30 PM CDT for Lowndes County, Alabama. It was in force for 50 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
Apr 18, 1998, 7:30 PM CDT (00:30 UTC)
Expired
Apr 18, 1998, 8:20 PM CDT
In force
50 min
Issued by
NWS Birmingham, AL
Area
Whole counties

County Lowndes County, AL

The radar

The Maxwell AFB radar (KMXX), 91 km from the middle of the area, began a volume at 00:29 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 18, 5:45 PM CDTTornado WatchSPC5 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 0.5 hours before the alert went out and 115 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 1998-04-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 782 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 00:00Z on 1998-04-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 229 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
782 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
612 m above ground
0-6 km bulk shear
83 kt
0-1 km storm-relative helicity
229 m²/s²
0-3 km storm-relative helicity
393 m²/s²
Significant tornado parameter
1.7
Supercell composite
13.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBHM 190030 RRA
TORBHM
ALC085-190120-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
730 PM CDT SAT APR 18 1998

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* TORNADO WARNING FOR...
  LOWNDES COUNTY... IN CENTRAL ALABAMA

* UNTIL 820 PM CDT

* AT 728 PM CDT... A POSSIBLE TORNADO WAS DETECTED MOVING INTO THE
SOUTHWESTERN PORTION OF LOWNDES COUNTY... 6 MILES SOUTH OF
FARMERSVILLE... BY NATIONAL WEATHER SERVICE DOPPLER RADAR.  THIS
STORM IS MOVING NORTHEAST 45 MPH.

* TORNADO WILL BE NEAR...
  FARMERSVILLE AROUND 727 PM CDT ...
  BRAGGS AROUND 728 PM CDT ...
  FOSTORIA AROUND 730 PM CDT ...
  COLLIRENE AROUND 735 PM CDT ...
  LOWNDESBORO AROUND 750 PM CDT ...

GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR!

REMEMBER... A TORNADO WATCH MEANS THAT TORNADOES ARE POSSIBLE IN
AND NEAR THE WATCH AREA. LARGE HAIL... DAMAGING WINDS... AND
TORRENTIAL RAINFALL MAY ALSO OCCUR. BE READY TO SEEK A PLACE OF
SAFETY IF A WARNING IS ISSUED FOR YOUR AREA.

THIS IS A DANGEROUS STORM SITUATION. ACT QUICKLY. IF YOU ARE IN
THE PATH OF THIS TORNADO MOVE TO A SHELTER BELOW GROUND IF
AVAILABLE. OTHERWISE... GO TO A SMALL INTERIOR ROOM ON THE\ LOWEST
FLOOR. AVOID WINDOWS AND DOORS. ABANDON CARS AND MOBILE HOMES FOR
A STURDIER BUILDING OR GET INTO A DITCH OR CULVERT.

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, Apr 18, 7:20 PM CDT, 10 minutes before
ALZ023-032-039-190125-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
720 PM CDT SAT APR 18 1998

THE TORNADO WATCH NUMBER 246 HAS BEEN CANCELLED FOR THE FOLLOWING
COUNTIES...

IN ALABAMA

   ...TUSCALOOSA... HALE... MARENGO

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 18, 7:01 PM CDTTornado WarningBMXMarshall19 min
Apr 18, 7:02 PM CDTTornado WarningBMXJefferson33 min
Apr 18, 7:13 PM CDTSevere Thunderstorm WarningBMXChilton62 min
Apr 18, 7:26 PM CDTFlash Flood WarningBMXDeKalb4 hr
Apr 18, 7:26 PM CDTSevere Thunderstorm WarningBMXSt. Clair, Talladega64 min
Apr 18, 7:36 PM CDTTornado WarningBMXDeKalb44 min
Apr 18, 7:39 PM CDTTornado WarningBMXChilton31 min
Apr 18, 7:44 PM CDTTornado WarningBMXCherokee46 min
Apr 18, 7:55 PM CDTTornado WarningBMXShelby20 min
Apr 18, 7:58 PM CDTSevere Thunderstorm WarningBMXCalhoun47 min
Apr 18, 8:23 PM CDTTornado WarningBMXTalladega62 min
Apr 18, 9:06 PM CDTSevere Thunderstorm WarningBMXCherokee19 min

Nearby

Tornado Warnings in Alabama, 1998Every tornado warning in 1998Tornadoes in 1998

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.