Alabamians are well aware of tornadoes. They know what to do. They got more than enough advanced warning because Birmingham and Huntsville TV stations were doing weather coverage pretty much all day. The lead time on warnings from NWS Huntsville and NWS Birmingham was 20-25 minutes, well above the average of 11-14 minutes. What you have here - some touched on it a little - is that:
1. Many folks down south do not have basements and storm cellars.
2. The tornadoes were very powerful, therefore homes and business had no chance of withstanding the storms.
This was a situation where if you wasn't underground, there was a 50-50 shot of being killed. Unfortunately, many were killed even though they followed proper procedures.
On another note, here is the statement from NWS Memphis on the Smithfield, Miss. tornado that was upgraded to an EF5:
PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
1150 AM CDT FRI APR 29 2011
...PRELIMINARY RARE EF-5 TORNADO IN MONROE COUNTY MISSISSIPPI...
AFTER A REVIEW OF THE DAMAGE PHOTOS TAKEN DURING THURSDAY/S GROUND
SURVEY AND CONSULTATION WITH NATIONAL EXPERTS...THE NATIONAL
WEATHER SERVICE IN MEMPHIS HAS UPGRADED THE SMITHVILLE TORNADO
RATING TO EF-5 DAMAGE. THIS IS THE HIGHEST RATING FOR TORNADO
DAMAGE AND THE FIRST EF-5 OR F-5 IN MISSISSIPPI SINCE THE
CANDLESTICK PARK TORNADO NEAR JACKSON ON MARCH 3RD 1966.
* COUNTY/COUNTIES: MONROE
* LOCATION/TIME OF EVENT: SMITHVILLE AT 344 PM EDT ON APRIL 27
2011
* BEGINNING POINT: 34.0517, -88.4236
* ENDING POINT: 34.0731, -88.3814
* RATING: EF-5
* ESTIMATED PEAK WIND: 205 MPH
* PATH LENGTH: 2.82 MILES
* MAXIMUM WIDTH: 1/2 MILE
* FATALITIES: 14
* INJURIES: 40
* SUMMARY OF DAMAGES: 18 HOMES DESTROYED...2 BUSINESSES /POST
OFFICE AND POLICE STATION/ DESTROYED...8 HOMES WITH MAJOR
DAMAGE...7 BUSINESSES WITH MAJOR DAMAGE...44 HOMES WITH MINOR
DAMAGE...AND WATER SYSTEM DESTROYED. MOST TREES EITHER SNAPPED
OR TWISTED AND DEBARKED. MOST THE HOMES DESTROYED WERE WELL
BUILT...TWO STORIES...LESS THAN TEN YEARS OLD AND BOLTED DOWN TO
THEIR FOUNDATIONS. AN 1965 CHEVY PICKUP TRUCK PARKED IN FRONT
ONE OF THE DESTROYED HOMES HAS NOT BEEN FOUND. ALL APPLIANCES
AND PLUMBING FIXTURES IN THE MOST EXTREME DAMAGE PATH SHREDDED
OR MISSING.
$$
OKULSKI/INGRAM