Alert archive / Alabama / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 68, NWS Mobile, AL

February 21, 1997Monroe County, Wilcox County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Feb 21, 1997, 8:21 AM CST for Monroe County, Wilcox County, Alabama. It was in force for 69 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: Feb 21, 1997, 8:21 AM CST (14:21 UTC)
Expired: Feb 21, 1997, 9:30 AM CST
In force: 69 min
Issued by: NWS Mobile, AL
Area: Whole counties

Counties Monroe County, AL, Wilcox County, AL

The radar

The Mobile radar (KMOB), 150 km from the middle of the area, began a volume at 14:20 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, 2.4 hours before the alert went out and 164 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 116 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 589 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 475 m²/s²
0-3 km storm-relative helicity: 530 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMOB 211422 RRA
SVRMOB
ALC131-099-211530-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
821 AM CST FRI FEB 21 1997
 
THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  930 AM CST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTH ALABAMA
 
   ...WILCOX COUNTY
 
IN SOUTHWEST ALABAMA
 
   ...MONROE COUNTY
 
AT 817 AM CST MOBILE DOPPLER WEATHER RADAR CONTINUED TO SHOW A LINE OF
SEVERE THUNDERSTORMS MOVING THROUGH SOUTHWEST ALABAMA. THE LINE OF
STORMS WILL BE MOVING INTO WILCOX AND MONROE COUNTIES BY 820 AM. THE
STORNGEST STORMS WILL MOVE THROUGH OR NEAR CAMDEN AND MONROEVILLE BY 845
AM. WIND GUSTS OF 60 MPH AND HIGHER WERE REPORTED FROM THESE STORMS
EARLIER THIS MORNING. THE THUNDERSTORMS WERE MOVING NORTHEAST AT 55 MPH.
 
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNAzDOES
WITH LITTLE OR NO ADVANCE WARNING.  REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 21, 7:19 AM CST	Severe Thunderstorm Warning	MOB	Choctaw, Washington	56 min
Feb 21, 7:37 AM CST	Severe Thunderstorm Warning	MOB	Clarke	53 min
Feb 21, 8:14 AM CST	Severe Thunderstorm Warning	MOB	Washington	61 min
Feb 21, 9:24 AM CST	Severe Thunderstorm Warning	MOB	Mobile, Washington	66 min
Feb 21, 9:35 AM CST	Severe Thunderstorm Warning	MOB	Clarke	55 min
Feb 21, 10:03 AM CST	Severe Thunderstorm Warning	MOB	Monroe	42 min
Feb 21, 10:11 AM CST	Severe Thunderstorm Warning	MOB	Wilcox	64 min
Feb 21, 10:50 AM CST	Severe Thunderstorm Warning	MOB	Mobile	55 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1997 Every severe thunderstorm warning in 1997

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.