Alert archive / Alabama / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 263, NWS Mobile, AL

November 1, 1997Monroe County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Nov 1, 1997, 3:14 PM CST for Monroe County, Alabama. It was in force for 61 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: Nov 1, 1997, 3:14 PM CST (21:14 UTC)
Expired: Nov 1, 1997, 4:15 PM CST
In force: 61 min
Issued by: NWS Mobile, AL
Area: Whole counties

County Monroe County, AL

The radar

The Mobile radar (KMOB), 129 km from the middle of the area, began a volume at 21:16 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
Nov 1, 3:20 PM CST	Thunderstorm Wind 50	Hybart, AL	Trees and power lines were blown down along State Road 41 near the community of Hybart.

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
Nov 1, 1:15 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Eglin AFB/Valpar, FL (KVPS), launched 12:00Z, 9.2 hours before the alert went out and 147 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: 1154 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 625 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 169 m²/s²
0-3 km storm-relative helicity: 164 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMOB 012114 RRA
SVRMOB
ALC099-MSC039-012215-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
314 PM CST SAT NOV 1 1997
 
THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  415 PM CST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHWEST ALABAMA
 
   ...MONROE COUNTY
 
 
IN SOUTHEAST MISSISSIPPI
 
   ...GEORGE COUNTY
 
AT 311 PM CST MOBILE RADAR SHOWED A LINE OF SEVERE THUNDERSTORMS FROM
MONROE COUNTY ALABAMA SOUTHWEST TO GEORGE COUNTY MISSISSIPPI. THE LINE
OF STORMS WAS MOVING SOUTHEAST AT 20 MPH. THESE STORMS WILL MOVE ACROSS
BOTH COUNTIES THROUGH 415 PM.
 
SEVERAL REPORTS OF LARGE HAIL HAVE BEEN RECEIVED FROM AREAS TO THE WEST.
 
A TORNADO WATCH IS ALSO IN EFFECT FOR SOUTHWEST ALABAMA AND A SEVERE
THUNDERSTORM WATCH FOR SOUTHEAST MISSISSIPPI. 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
Nov 1, 12:40 PM CST	Severe Thunderstorm Warning	MOB	Choctaw, Clarke, Washington	2 hr
Nov 1, 1:16 PM CST	Severe Thunderstorm Warning	MOB	Covington	59 min
Nov 1, 2:10 PM CST	Tornado Warning	MOB	Choctaw	65 min
Nov 1, 2:21 PM CST	Severe Thunderstorm Warning	MOB	Butler	54 min
Nov 1, 2:42 PM CST	Severe Thunderstorm Warning	MOB	Clarke, Washington	2 hr
Nov 1, 2:42 PM CST	Severe Thunderstorm Warning	MOB	Wilcox	2 hr
Nov 1, 2:56 PM CST	Tornado Warning	MOB	Washington	64 min
Nov 1, 3:33 PM CST	Severe Thunderstorm Warning	MOB	Crenshaw	27 min
Nov 1, 3:47 PM CST	Severe Thunderstorm Warning	MOB	Mobile	58 min
Nov 1, 3:47 PM CST	Severe Thunderstorm Warning	MOB	Conecuh	58 min
Nov 1, 3:57 PM CST	Severe Thunderstorm Warning	MOB	Escambia	63 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.