Alert archive / Mississippi / Tornado Warnings in 1991
Tornado Warning 11, NWS Mobile, AL
NWS Mobile, AL issued this tornado warning at Apr 29, 1991, 1:20 PM CDT for Harrison County, Jackson County, Mississippi. It was in force for 40 min.
The area
The counties it named.
The facts
- Issued
- Apr 29, 1991, 1:20 PM CDT (18:20 UTC)
- Expired
- Apr 29, 1991, 2:00 PM CDT
- In force
- 40 min
- Issued by
- NWS Mobile, AL
- Area
- Whole counties
Counties Harrison County, MS, Jackson County, MS
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 6.3 hours before the alert went out and 84 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.
- Mixed-layer CAPE
- 2664 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 578 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 193 m²/s²
- 0-3 km storm-relative helicity
- 211 m²/s²
- Significant tornado parameter
- 2.6
- Supercell composite
- 12.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMOB 291822 TORMOB MSC047-059-291900- BULLETIN - EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE MOBILE AL 120 PM CDT MON APR 29 1991 THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 200 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHEAST MISSISSIPPI ...HARRISON COUNTY...JACKSON COUNTY AT 115 PM CDT GULFPORT PD REPORTED A TORNADO IN GULFPORT. THE THUNDERSTORM CONTINING THE TORNADO IS MOVING TOWARD THE NORTHEAST AT 35 MPH AND WILL MOVE NEAR D'IBERVILLE DURING THE NEXT FEW MINUTES. IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A BASEMENT. GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE. IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM SUCH AS A CLOSET ON THE LOWEST FLOOR. USE BLANKETS...PILLOWS... OR CUSHIONS TO COVER YOUR BODY. AVOID WINDOWS.
What forecasters said that day
The local office's own words before this tornado 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, Apr 29, 7:30 AM CDT, 5 hours 50 minutes before
MSZ014-013-291430- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 730 AM CDT MON APR 29 1991 ...TORNADO WATCH NUMBER 235 IS IN EFFECT FOR THE FOLLOWING COUNTIES OF SOUTHEAST MISSISSIPPI... PEARL-RIVER... AND PERRY UNTIL 9 AM CDT... MOBILE AT 725 AM CDT SHOWED ONLY ISOLATED SHOWERS OVER SOUTHEAST MISSISSIPPI WITH THE STORM SYSTEM STILL NORTH AND NORTHWEST OF THE SOUTHEAST COUNTIES OF MISSISSIPPI. WEATHER PROBLEMS FOR THE PEARL-RIVER AND PERRY COUNTIES FOR THE NEXT COUPLE HOURS WILL ONLY BE IN THE FORM OF GUSTY WINDS RANGING FROM THE LOW TO UPPER 20S FROM THE SOUTH. THE AIRMASS OVER THE AREA REMAINS UNSTABLE WITH STRONG THUNDERSTORMS MOVING INTO THE AREA LATER THIS MORNING.
Special weather statement, Apr 29, 10:10 AM CDT, 3 hours 10 minutes before
ALZ013-015-016-MSZ014-013-291615- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 1010 AM CDT MON APR 29 1991 ...A TORNADO WATCH REMAINS IN EFFECT FOR ALL OF SOUTHEAST MISSISSIPPI AND SOUTHWEST ALABAMA UNTIL 100 PM... ALL COUNTIES IN SOUTHEAST MISSISSIPPI AND IN SOUTHWEST ALABAMA ARE UNDER A TORNADO WATCH UNTIL EARLY AFTERNOON. WEATHER SERVICE RADARS INDICATED AT 1000 AM AN AREA OF THUNDERSTORMS WITH THE LEADING EDGE ALONG A THOMASVILLE TO MILLRY ALABAMA LINE SOUTHWEST TO NEAR RICHTON AND POPLARVILLE MISSISSIPPI. THE AREA WAS MOVING TOWARD THE EAST AT 10 MPH WHILE THE INDIVIDUAL THUNDERSTORMS WERE MOVING NORTHEAST AT 40 MPH. STRONG THUNDERSTORMS WERE INDICATED JUST WEST OF LAKE PONCHARTRAIN IN LOUISIANA. THE ATMOSPHERE REMAINS MOIST AND UNSTABLE THIS MORNING AND WILL BECOME MORE SO BY AFTERNOON. RESIDENTS IN SOUTHEAST MISSISSIPPI AND SOUTHWEST ALABAMA SHOULD REMAIN ALERT FOR THE POSSIBILITY OF SEVERE WEATHAER TODAY AND BE READY TO TAKE QUICK ACTION IF SEVERE WEATHER IS OBSERVED OR A WARNING IS ISSUED.
Local storm report, Apr 29, 11:47 AM CDT, 1 hour 33 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE MOBILE AL
1147 AM CDT MON APR 29 1991
TIME EVENT
1135 AM CLARKE COUNTY EMA DIRECTOR REPORTED A TORNADO CROSSED
US HIGHWAY 84 6 MILES WEST OF GROVE HILL.Nearby
Tornado Warnings in Mississippi, 1991Every tornado warning in 1991Tornadoes in 1991
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.