Alert archive / Alabama / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 146, NWS Mobile, AL

April 22, 1997Baldwin County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Apr 22, 1997, 11:30 PM CDT for Baldwin County, Alabama. It was in force for 60 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Apr 22, 1997, 11:30 PM CDT (04:30 UTC)
Expired: Apr 23, 1997, 12:30 AM CDT
In force: 60 min
Issued by: NWS Mobile, AL
Area: Whole counties

County Baldwin County, AL

The radar

The Mobile radar (KMOB), 47 km from the middle of the area, began a volume at 04:31 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

Time	Report	Where	Remark
Apr 22, 11:55 PM CDT	Hail 0.75	Robertsdale, AL	Dime size hail was reported in Robertsdale.

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 watch it was issued in

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

Issued	Product	Office	Lasted
Apr 22, 9:00 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 4.5 hours before the alert went out and 192 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: 2665 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 797 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 132 m²/s²
0-3 km storm-relative helicity: 180 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 7.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMOB 230430 RRA
SVRMOB
ALC003-230530-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1130 PM CDT TUE APR 22 1997
 
THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1230 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHWEST ALABAMA
 
   ...SOUTHERN BALDWIN COUNTY
 
 
WEATHER SERVICE RADAR INDICATED A CLUSTER OF SEVERE THUNDERSTORMS
EXTENDING FROM BON SECOUR TO FOLEY TO SEMINOLE. MOVEMENT WAS TOWARD THE
EAST NORTHEAST AT 40 MPH. THE PRIMARY THREAT WITH THESE STORMS WILL BE
HIGH WINDS.
 
 
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY< DO PRODUCE TORNADOES
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
Apr 22, 7:07 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	68 min
Apr 22, 8:05 PM CDT	Severe Thunderstorm Warning	MOB	Butler	55 min
Apr 22, 8:18 PM CDT	Severe Thunderstorm Warning	MOB	Covington, Crenshaw	57 min
Apr 22, 8:48 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	57 min
Apr 22, 8:48 PM CDT	Severe Thunderstorm Warning	MOB	Washington	57 min
Apr 22, 9:16 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Clarke	59 min
Apr 22, 9:37 PM CDT	Severe Thunderstorm Warning	MOB	Escambia	68 min
Apr 22, 9:44 PM CDT	Severe Thunderstorm Warning	MOB	Conecuh, Monroe	61 min
Apr 22, 9:53 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	67 min
Apr 22, 10:24 PM CDT	Severe Thunderstorm Warning	MOB	Covington	66 min
Apr 22, 10:32 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin	58 min
Apr 22, 10:44 PM CDT	Severe Thunderstorm Warning	MOB	Crenshaw	61 min
Apr 22, 11:59 PM CDT	Tornado Warning	MOB	Baldwin	46 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.