Alert archive / Alabama / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 60, NWS Mobile, AL

March 5, 1998Covington County, Alabama; Okaloosa County, Florida

NWS Mobile, AL issued this severe thunderstorm warning at Mar 5, 1998, 3:22 PM CST for Covington County, Alabama; Okaloosa County, Florida. It was in force for 63 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: Mar 5, 1998, 3:22 PM CST (21:22 UTC)
Expired: Mar 5, 1998, 4:25 PM CST
In force: 63 min
Issued by: NWS Mobile, AL
Area: Whole counties

Counties Covington County, AL, Okaloosa County, FL

The radar

The Eglin Afb radar (KEVX), 72 km from the middle of the area, began a volume at 21:25 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

Eglin AFB/Valpar, FL (KVPS), launched 12:00Z, 9.4 hours before the alert went out and 53 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: 31 J/kg
Mixed-layer CIN: -75 J/kg
Mixed-layer LCL: 778 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 204 m²/s²
0-3 km storm-relative helicity: 286 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMOB 052122 RRA
SVRMOB
ALC039-FLC091-052225-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
322 PM CST THU MAR 5 1998


THE NATIONAL WEATHER SERVICE IN MOBILE AL HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 425 PM CST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...

IN SOUTHERN ALABAMA

   ...SOUTHERN COVINGTON COUNTY

IN NORTHWESTERN FLORIDA

   ...OKALOOSA COUNTY


AT 320 PM CST... DOPPLER RADAR A|T MOBILE INDICATED A LINE OF
STRONG TO SEVERE THUNDERSTORMS MOVING FROM CENTURY FL TO OPP AL.

THIS LINE OF STORMS WAS MOVING SOUTH AT 20 MPH.

LARGE HAIL AND DAMAGING WINDS WILL BE THE MAIN THREAT WITH THESE
STORMS.

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 5, 12:11 PM CST	Severe Thunderstorm Warning	MOB	Mobile	64 min
Mar 5, 12:39 PM CST	Severe Thunderstorm Warning	MOB	Monroe, Wilcox	61 min
Mar 5, 1:17 PM CST	Severe Thunderstorm Warning	MOB	Baldwin, Mobile	63 min
Mar 5, 2:14 PM CST	Tornado Warning	MOB	Washington	56 min
Mar 5, 2:28 PM CST	Severe Thunderstorm Warning	MOB	Covington, Escambia	57 min
Mar 5, 2:28 PM CST	Severe Thunderstorm Warning	MOB	Baldwin	57 min
Mar 5, 4:03 PM CST	Severe Thunderstorm Warning	MOB	Clarke, Monroe	62 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1998 Severe Thunderstorm Warnings in Florida, 1998 Every severe thunderstorm warning 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.