A warm and unstable air mass caused isolated to scattered showers and thunderstorms over several days. Some of the storms produced large hail and damaging winds.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS BMX wrote it up.
A warm and unstable air mass caused isolated to scattered showers and thunderstorms over several days. Some of the storms produced large hail and damaging winds.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Birmingham, AL wrote its last area forecast discussion before the first event at Jun 20, 8:49 PM CST, 9 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BIRMINGHAM AL 949 PM CDT MON JUN 20 2011 .UPDATE...FOR EVENING DISCUSSION. && .DISCUSSION... AS WE SAY OFTEN...ALL STORMS NEED IS SOME LIFTING MECHANISM. WELL IT LOOKS LIKE ONE OR TWO ARE GETTING JUST THAT. A COUPLE OF ISOLATED THUNDERSTORMS HAVE BROKEN OUT THIS EVENING OVER WESTERN PORTIONS OF CENTRAL ALABAMA...MAINLY DUE TO A WEAK SHORTWAVE THAT IS PASSING OVER THE SOUTHEAST...CREATING A LITTLE LIFT. NOT EXPECTING ANYTHING REAL SIGNIFICANT...BUT THESE STORMS WILL NEED TO BE WATCHED OVER THE NEXT COUPLE OF HOURS AS THERE IS PLENTY OF LOW AND MID-LEVEL INSTABILITY OUT THERE...AS SEEN IN THE 00Z UPPER AIR PROFILES AROUND THE REGION. THE GOOD NEWS THAT SHOULD KEEP THESE STORMS AT-BAY IS THE WARMER AIR ALOFT...AS TEMPERATURES HOVER AROUND -5 DEGREES AT 500MB. COULD SEE A COUPLE SPIT OUT 25 TO 35 MPH...AND MAYBE SOME PEA SIZED HAIL...BUT THAT SHOULD BE ABOUT IT. TWEAKED OVERNIGHT LOWS AGAIN...AS THAT WORKED OUT PRETTY WELL IN LAST NIGHTS UPDATE. UPDATES WILL BE OUT SHORTLY. 27 && .AVIATION...00Z TAF DISCUSSION. A FEW SHOWERS HAVE DEVELOPED ACROSS CENTRAL ALABAMA WHICH IS A SIGN THAT THE UPPER RIDGE IS FINALLY BEGINNING TO BREAK DOWN. VISIBLE SATELLITE IMAGERY STILL SHOWS A RELATIVELY DRY LOW LEVEL AIR MASS OVER THE NORTHEAST GULF OF MEXICO...WHICH WILL HELP KEEP SKIES MOSTLY THRU 12Z. WIDESPREAD MVFR CIGS ARE EXPECTED TO FORM OVER MISSISSIPPI OVERNIGHT AND BACK SIDE OF LOW LEVEL RIDGE...AND MVFR CIGS WILL LIKELY AFFECT AREAS WEST OF KTCL BETWEEN 09Z AND 12Z...AND THEN MOVE INTO KTCL ARND 12Z. AFTER 15Z CLOUDS WITH BASES OF 3000-5000 FEET AGL WILL SPREAD RAPIDLY EASTWARD ACROSS CENTRAL ALABAMA...AS MOISTURE INCREASES AHEAD OF SLOW MOVING SHORT WAVE TROF. THE AIR MASS WILL BE UNSTABLE ENOUGH FOR SCATTERED TSTMS TO DEVELOP AFTER 18Z...MAINLY ALONG AND WEST OF I-65. NOTICE...KEET TAF WILL HAVE (AMD LTD TO VIS WIND AND WX) AMENDED TO THE END OF THE FORECAST UNTIL FURTHER NOTICE. THE CEILOMETER DATA WILL BE GOING THROUGH NUMEROUS TESTS AND MONITORED FOR ACCURACY. 58/ROSE && .BMX WATCHES/WARNINGS/ADVISORIES...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BIRMINGHAM AL 740 PM CDT MON JUN 20 2011 ALZ011>015-017>050-211300- AUTAUGA-BARBOUR-BIBB-BLOUNT-BULLOCK-CALHOUN-CHAMBERS-CHEROKEE- CHILTON-CLAY-CLEBURNE-COOSA-DALLAS-ELMORE-ETOWAH-FAYETTE-GREENE-HALE- JEFFERSON-LAMAR-LEE-LOWNDES-MACON-MARENGO-MARION-MONTGOMERY-PERRY- PICKENS-PIKE-RANDOLPH-RUSSELL-SHELBY-ST CLAIR-SUMTER-TALLADEGA- TALLAPOOSA-TUSCALOOSA-WALKER-WINSTON- 740 PM CDT MON JUN 20 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE COUNTIES SERVED BY THE NATIONAL WEATHER SERVICE OFFICE IN BIRMINGHAM. .DAY ONE...TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT IS NOT EXPECTED AT THIS TIME.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BIRMINGHAM AL 950 PM CDT MON JUN 20 2011 ALZ012-210315- LAMAR AL- 950 PM CDT MON JUN 20 2011 ...SIGNIFICANT WEATHER ADVISORY FOR LAMAR COUNTY UNTIL 1015 PM CDT... AT 948 PM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A STRONG THUNDERSTORM 6 MILES SOUTHEAST OF VERNON...MOVING NORTH AT 30 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH FREQUENT DANGEROUS LIGHTNING. LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE... VERNON... BLOOMING GROVE... LAMAR COUNTY AIRPORT... BEAVERTON... CREWS... && LAT...LON 3404 8806 3389 8795 3358 8795 3363 8820 TIME...MOT...LOC 0251Z 200DEG 26KT 3370 8806
The Columbus AFB radar (KGWX), 35 km away, was scanning. The volume nearest the first event began at 02:56 UTC.
24 thunderstorm wind. Local standard time, as filed.
About 30 trees were blown down in the Crossville community, east of Vernon. A large limb fell through the roof of a home.
A few trees were blown down on Boyd Road, near the Echola community.
Tree limbs were snapped and awnings were blown down, near the country club in Irondale.
A tree was blown down onto a house on Rock Ridge Drive, in Mountain Brook.
Refurbished tin and truss over an old flat roof was peeled off the top of a business. Sections of roofing were also partially removed from an athletic center. Winds were estimated around 70 mph.
Several trees were uprooted along and north of Old Springville Road, westward to near the county line.
A large hardwood tree was uprooted southwest of Springville.
Trees and power lines were blown down in the Holly Springs and Highland Lakes communities.
Single trees were blown down at several locations around Saint Claire County, including on Old Wagon Road, US-231 at Old Beavers Road, Buck Valley Road, and Village Springs Road.
Trees and power lines were blown down at several locations around the Altoona community.
Trees and power lines were blown down in several locations around the Walnut Grove community.
Several trees were blown down on Lawson Gap Road, near Mountainboro.
A tree was blown down onto Mohawk Cliff Road, near Ohatchee.
Several trees and power lines were blown down around the Sardis City community.
Trees were blown down on Littleton Road, north of Attala.
Several trees were blown down on CR-33, south of Hayneville.
Trees were blown down in several locations on the southeast side of the city of Montgomery.
Several trees were blown down around Jacksonville. Two vehicles were damaged by fallen trees.
A few trees were blown down on AL-139, near Maplesville.
Numerous trees and power lines were blown down near CR-22 and CR-15, near the Moores Crossroads community.
Trees and power lines were blown down in several areas around the city of Sylacauga. Trees fell onto at least 2 cars and 1 truck.
Numerous trees were blown down around Pell City.
Trees and power lines were blown down in Anniston.
Trees and power lines were blown down around Piedmont.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Alabama in 2011Every state in 2011This day in weather historyWarnings in Alabama, June 2011
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 327255, 327260, 327277, 327272, 327284, 327286, 327289, 327292, 327300, 327302, 327303, 327308, 327309, 327310, 327311, 327314, 327316, 327320, 327323, 327327, 327329, 327331, 327332, 327335.