Alert archive / Alabama / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 8, NWS Mobile, AL

February 10, 1990Washington County, Alabama; Greene County, Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Feb 10, 1990, 1:47 AM CST for Washington County, Alabama; Greene County, Mississippi. It was in force for 58 min. 2 reports 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
Feb 10, 1990, 1:47 AM CST (07:47 UTC)
Expired
Feb 10, 1990, 2:45 AM CST
In force
58 min
Issued by
NWS Mobile, AL
Area
Whole counties

Counties Washington County, AL, Greene County, MS

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

TimeReportWhereRemark
Feb 10, 2:30 AM CSTThunderstorm Wind 0Washington, AL
Feb 10, 2:44 AM CSTThunderstorm Wind 0Greene, MS

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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 7.8 hours before the alert went out and 170 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, Slidell Radar S, LA at 00:00Z on 1990-02-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1257 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 00:00Z on 1990-02-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 100 square meters per square second.19395878Sfc1 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
1257 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
650 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
100 m²/s²
0-3 km storm-relative helicity
128 m²/s²
Significant tornado parameter
0.7
Supercell composite
3.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMOB 100748
SVRMOB
ALC129-MSC041-100845-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
147 AM CST SAT FEB 10 1990
 
THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  245 AM CST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHWEST ALABAMA
 
   ...WASHINGTON COUNTY
 
 
IN SOUTHEAST MISSISSIPPI
 
   ...GREENE COUNTY
 
AT 145 AM A LINE OF INTENSE THUNDERSTORMS WAS LOCATED FROM 10 MILES
NORTHEAST OF WAYNESBORO SOUTHWEST TO 10 MILES NORTH OF WIGGINS IN
MISSISSIPPI. THE LINE WAS MOVING TOWARD THE EAST AT 45 MPH
 
THIS LINE HAS PRODUCED DAMAGE IN SOUTHEAST MISSISSIPPI AS IT PASSED.
 
 
A TORNADO WAZTCH 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.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Feb 10, 12:39 AM CST, 1 hour 8 minutes before
ALZ013-015-016-MSZ013-014-100800-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1240 AM CST SAT FEB 10 1990

...TORNADO WATCH IN EFFECT FOR ALL OF SOUTHEAST MISSISSIPPI AND
SOUTHWEST ALABAMA AND THE ADJACENT COASTAL WATERS UNTIL 600 AM...

AT 1235 AM THE MOBILE RADAR SHOWED A LINE OF VERY STRONG THUNDERSTORMS
FROM EAST CENTRAL TO SOUTHWEST MISSISSIPPI SOUTHWEST INTO CENTRAL
LOUISIANA.  THE LINE WAS MOVING TOWARD THE EAST AT 40 MPH WHILE THE
INDIVIDUAL THUNDERSTORMS WERE MOVING TOWARD THE NORTHEAST AT 45 MPH.

THIS LINE OF THUNDERSTORMS WILL MOVE INTO PORTIONS OF SOUTHEAST
MISSISSIPPI BEFORE 200 AM.  RESIDENTS OF THE AREA SHOULD BE PREPARED
FOR THE POSSIBILITY OF SEVERE WEATHER AND REMAIN ALERT.

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 10, 1:27 AM CSTSevere Thunderstorm WarningMOBCoffee, Dale48 min
Feb 10, 2:07 AM CSTSevere Thunderstorm WarningMOBClarke68 min
Feb 10, 2:15 AM CSTSevere Thunderstorm WarningMOBDallas, Wilcox60 min
Feb 10, 2:44 AM CSTSevere Thunderstorm WarningMOBMobile, Washington46 min
Feb 10, 2:53 AM CSTSevere Thunderstorm WarningMOBAutauga, Lowndes67 min
Feb 10, 3:05 AM CSTSevere Thunderstorm WarningMOBCoosa, Elmore55 min
Feb 10, 3:05 AM CSTSevere Thunderstorm WarningMOBMontgomery55 min
Feb 10, 3:05 AM CSTSevere Thunderstorm WarningMOBButler55 min
Feb 10, 3:20 AM CSTTornado WarningMOBMontgomery25 min
Feb 10, 3:27 AM CSTSevere Thunderstorm WarningMOBMobile63 min
Feb 10, 3:27 AM CSTSevere Thunderstorm WarningMOBBaldwin63 min
Feb 10, 3:31 AM CSTSevere Thunderstorm WarningMOBMacon, Tallapoosa59 min
Feb 10, 3:49 AM CSTSevere Thunderstorm WarningMOBChambers, Lee56 min
Feb 10, 3:49 AM CSTSevere Thunderstorm WarningMOBCrenshaw56 min
Feb 10, 3:49 AM CSTSevere Thunderstorm WarningMOBBullock56 min
Feb 10, 3:55 AM CSTSevere Thunderstorm WarningMOBConecuh, Escambia50 min
Feb 10, 4:11 AM CSTSevere Thunderstorm WarningMOBButler, Covington64 min
Feb 10, 4:53 AM CSTSevere Thunderstorm WarningMOBBarbour67 min
Feb 10, 5:08 AM CSTSevere Thunderstorm WarningMOBCoffee, Dale, Geneva67 min
Feb 10, 6:46 AM CSTSevere Thunderstorm WarningMOBMobile44 min
Feb 10, 8:07 AM CSTSevere Thunderstorm WarningMOBBaldwin38 min
Feb 10, 1:14 AM CSTSevere Thunderstorm WarningMOBForrest, Lamar31 min
Feb 10, 1:21 AM CSTSevere Thunderstorm WarningMOBPerry54 min
Feb 10, 2:07 AM CSTSevere Thunderstorm WarningMOBPearl River68 min
Feb 10, 2:44 AM CSTSevere Thunderstorm WarningMOBGeorge46 min
Feb 10, 7:17 AM CSTSevere Thunderstorm WarningMOBJackson28 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1990Severe Thunderstorm Warnings in Mississippi, 1990Every severe thunderstorm warning in 1990

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.