Alert archive / Alabama / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 101, NWS Mobile, AL

July 11, 1989Montgomery County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Jul 11, 1989, 5:50 PM CDT for Montgomery County, Alabama. It was in force for 55 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
Jul 11, 1989, 5:50 PM CDT (22:50 UTC)
Expired
Jul 11, 1989, 6:45 PM CDT
In force
55 min
Issued by
NWS Mobile, AL
Area
Whole counties

County Montgomery County, AL

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
Jul 11, 6:00 PM CDTThunderstorm Wind 0Montgomery, AL

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

Centreville/Bibb, AL (KCKL), launched 12:00Z, 10.8 hours before the alert went out and 120 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, Centreville/Bibb, AL at 12:00Z on 1989-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1137 joules per kilogram.LCLLFCEL10008507005003002001001 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, Centreville/Bibb, AL at 12:00Z on 1989-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 38 square meters per square second.1939Sfc1 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
1137 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
798 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
38 m²/s²
0-3 km storm-relative helicity
48 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.

000 
TTAA00 KMGM 112253
SVRMGM
ALC101-112345-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MONTGOMERY AL
550 PM CDT TUE JUL 11 1989
 
THE NATIONAL WEATHER SERVICE IN MONTGOMERY HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  645 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTH ALABAMA
          ...SOUTHERN MONTGOMERY
 
AT 550 PM CDT RADAR INDICATED A CLUSTER OF SEVERE THUNDERSTORMS OVER
SOUTHERN MONTGOMERY COUNTY NEAR RAMER MOVING SOUTHEAST AT AROUND
20 MPH.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

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, Jul 11, 5:45 PM CDT, 5 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE PENSACOLA FL
535 PM CDT SAT JUL 8 1989

...STRONG THUNDERSTORMS APPROACHING THE NORTHERN FLORIDA PANHANDLE...

AT 530 PM CDT...SCATTERED THUNDERSTORMS WERE OVER EXTREME SOUTHERN
ALABAMA. THEY EXTEND FROM DOTHAN TO BREWTON AND CITRONELLE...NORTHWARD
TO MONTGOMERY.

THE STRONGEST STORMS WERE BETWEEN BREWTON AND ENTERPRISE ALABAMA. THESE
STORMS WILL PRODUCE VERY HEAVY RAIN...GUSTY WINDS...LIGHTNING STRIKES...
AND POSSIBLE.

PERSONS IN NORTHERN ESCAMBIA...SANTA ROSA...OKALOOSA...WALTON AND HOLMES
COONTIES FLORIDA CAN EXPECT THESE CONDITIONS THE NEXT 2 HOURS.

MOVEMENTS WERE EAST-SOUTHEAST AROUND 18 MPH.
Special weather statement, Jul 11, 5:47 PM CDT, 3 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE PENSACOLA FL
535 PM CDT TUE JUL 11 1989

...STRONG THUNDERSTORMS APPROACHING THE NORTHERN FLORIDA PANHANDLE...

AT 530 PM CDT...SCATTERED THUNDERSTORMS WERE OVER EXTREME SOUTHERN
ALABAMA. THEY EXTEND FROM DOTHAN TO BREWTON AND CITRONELLE...NORTHWARD
TO MONTGOMERY.

THE STRONGEST STORMS WERE BETWEEN BREWTON AND ENTERPRISE ALABAMA. THESE
STORMS WILL PRODUCE VERY HEAVY RAIN...GUSTY WINDS...LIGHTNING STRIKES...
AND POSSIBLE.

PERSONS IN NORTHERN ESCAMBIA...SANTA ROSA...OKALOOSA...WALTON AND HOLMES
COONTIES FLORIDA CAN EXPECT THESE CONDITIONS THE NEXT 2 HOURS.

MOVEMENTS WERE EAST-SOUTHEAST AROUND 18 MPH.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 11, 4:53 PM CDTSevere Thunderstorm WarningMOBLowndes67 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1989Every severe thunderstorm warning in 1989

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.