Alert archive / Alabama / Tornado Watches in 1998

Tornado Watch 90

March 7, 199817 counties in Alabama; 10 counties in Florida; Clay County, Early County, Quitman County, Georgia

The Storm Prediction Center issued this tornado watch at Mar 7, 1998, 9:45 PM CST for 17 counties in Alabama; 10 counties in Florida; Clay County, Early County, Quitman County, Georgia. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Mar 7, 1998, 9:45 PM CST (03:45 UTC)
Expired
Mar 8, 1998, 4:00 AM CST
In force
6 hr
Issued by
the Storm Prediction Center
All 30 counties

Baldwin County, AL, Barbour County, AL, Butler County, AL, Clarke County, AL, Coffee County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Escambia County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Mobile County, AL, Monroe County, AL, Pike County, AL, Washington County, AL, Bay County, FL, Calhoun County, FL, Escambia County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Okaloosa County, FL, Santa Rosa County, FL, Walton County, FL, Washington County, FL, Clay County, GA, Early County, GA, Quitman County, GA

The radar

The Eglin Afb radar (KEVX), 116 km from the middle of the area, began a volume at 03:45 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.

Warnings issued inside it

14 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Mar 7, 11:14 PM CSTFlash Flood WarningMOBMobile116 min
Mar 8, 12:19 AM CSTFlash Flood WarningMOBBaldwin2 hr
Mar 8, 12:46 AM CSTSevere Thunderstorm WarningMOBConecuh64 min
Mar 8, 12:53 AM CSTSevere Thunderstorm WarningBMXBullock, Pike47 min
Mar 8, 12:59 AM CSTFlash Flood WarningMOBMobile3 hr
Mar 8, 1:08 AM CSTFlash Flood WarningMOBConecuh, Escambia2 hr
Mar 8, 1:19 AM CSTTornado WarningBMXPike31 min
Mar 8, 1:33 AM CSTFlash Flood WarningMOBCovington117 min
Mar 8, 1:55 AM CSTSevere Thunderstorm WarningBMXPike20 min
Mar 8, 2:00 AM CSTSevere Thunderstorm WarningBMXBarbour45 min
Mar 8, 2:18 AM CSTFlash Flood WarningMOBBaldwin, Escambia, Mobile4 hr
Mar 8, 2:18 AM CSTFlash Flood WarningMOBConecuh, Covington4 hr
Mar 8, 3:50 AM CSTFlash Flood WarningMOBEscambia2 hr
Mar 8, 3:57 AM CSTSevere Thunderstorm WarningMOBCovington63 min

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 3.8 hours before the alert went out and 240 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 1998-03-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 00:00Z on 1998-03-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 188 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
589 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
188 m²/s²
0-3 km storm-relative helicity
120 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

201 
WWUS9 KMKC 080309
SEL0  
MKC WW 080309
ALZ000-FLZ000-081000-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 90
STORM PREDICTION CENTER NORMAN OK
909 PM CST SAT MAR 7 1998

THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

   SOUTHERN ALABAMA                            
   FLORIDA PANHANDLE                            
   AND ADJACENT COASTAL WATERS

EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 945 PM UNTIL
400 AM CST.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 80 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 15 MILES NORTHWEST OF MOBILE ALABAMA TO 20
MILES EAST SOUTHEAST OF MARIANNA FLORIDA.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. 
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

DISCUSSION...THUNDERSTORMS HAVE INTENSIFIED OVER EXTREME SERN MS
DURING THE PAST HOUR. OUTFLOW BOUNDARY OVER THE GULF OF MEXICO IS
RETREATING NORTHWARD AND ALLOWING FOR AIR MASS RECOVERY. SHEAR
PROFILES ARE QUITE FAVORABLE FOR SEVERE THUNDERSTORMS...WITH 
0-3 KM HELICITY VALUES OF NEAR 1000 M2/S2 OFF THE LATEST VWP FROM
MOBILE ALABAMA.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 70 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. 
MEAN STORM MOTION VECTOR 25540.


...VESCIO

315,0882 315,0845 293,0845 294,0882

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 8, 4:00 AM CSTTornado WatchSPCBaldwin, Barbour, Butler, Choctaw, Clarke, Coffee and 13 more6 hr
Mar 8, 10:00 AM CSTTornado WatchSPCBaldwin, Barbour, Butler, Clarke, Coffee, Conecuh and 9 more5 hr
Mar 8, 11:45 AM CSTSevere Thunderstorm WatchSPCBarbour, Bullock, Chambers, Clay, Cleburne, Coosa and 10 more6 hr
Mar 8, 3:00 PM CSTTornado WatchSPCCoffee, Conecuh, Covington, Crenshaw, Dale, Escambia and 4 more6 hr
Mar 8, 3:45 PM CSTSevere Thunderstorm WatchSPCAutauga, Barbour, Blount, Bullock, Butler, Calhoun and 25 more5 hr
Mar 8, 2:15 AM CSTTornado WatchSPCAlachua, Baker, Columbia, Dixie, Franklin, Gadsden and 11 more6 hr
Mar 8, 8:00 AM CSTTornado WatchSPCBaker, Bradford, Clay, Columbia, Duval, Franklin and 12 more7 hr

Nearby

Tornado Watches in Alabama, 1998Tornado Watches in Florida, 1998Tornado Watches in Georgia, 1998Every tornado watch 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.