Numerous supercell thunderstorms developed in the late morning through the evening hours across Mississippi and Alabama. with another round of severe storms developing in the evening hours preceding a strong cold front.
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 MOB wrote it up.
Numerous supercell thunderstorms developed in the late morning through the evening hours across Mississippi and Alabama. A series of long track tornadic supercell thunderstorms impacted southeast Mississippi in the late morning through the afternoon hours...with another round of severe storms developing in the evening hours preceding a strong cold front.
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 Mobile, AL wrote its last area forecast discussion before the first event at Apr 15, 6:40 AM CST, 2 hours 31 minutes earlier.
AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE MOBILE AL
740 AM CDT FRI APR 15 2011
.UPDATE...PACKAGE UPDATED TO ADD TWO COUNTIES TO TOR WATCH NUMBER
140 IN EFFECT UNTIL 3 PM CDT.
/16
&
.SHORT TERM...(TODAY AND TONIGHT)SHORT TERM SHAPING UP TO BE QUITE
INTERESTING AS A CLOSE UPPER LOW OVER THE PLAINS MEANDERS
EASTWARD...MOVING TO OVER THE OHIO RIVER VALLEY TODAY THROUGH
TONIGHT. THERE HAS BEEN SOME WAFFLING IN THE GUIDANCE NORTH AND
SOUTH WITH THE PLACEMENT OF THE JET STRUCTURE THIS SYSTEM...WHICH
HAS CAUSED SOME ADJUSTMENT NORTH AND SOUTH OF THE BEST RISK FOR
SEVERE WEATHER. CURRENTLY...THE FA NORTH OF THE FL PANHANDLE IS
UNDER A MODERATE RISK OF SEVERE WEATHER...PER THE MIDNIGHT SPC
DISCUSSION. FOR MORE ON THIS...PLEASE REFERENCE THE SWODY1 PRODUCT
ISSUED BY SPC.
WITH CAPES INCREASING TO OVER 1500 TO 2000 J/KG TODAY(DEPENDING UPON
WHICH GUIDANCE ONE LOOKS AT)...ALONG WITH HELICITY VALUES IN THE
LOWEST 1KM LAYER INCREASING TO AROUND 300 M^2/S^S BY 7PM/00Z EARLY
THIS EVENING...SEE THE REASONING BEHIND THE SPC PLACEMENT. TIMING IS
A BIT INCONSISTENT IN THE NORTH/SOUTH RUNNING FRONT GETTING PUSHED
ACROSS THE FA...ALONG WITH THE EXPECTED SQUALL LINE ACROSS THE AREA.
GFS/ECMWF HAVE THE SQUALL LINE STARTING ACROSS THE AREA AROUND
7PM/00Z THIS EVENING...AND EXITING EAST OF THE AREA BY 1AM/06Z. NAM
IS SEVERAL HOURS SLOWER THAN THE MORE COURSE RESOLUTION MODELS...BUT
ALL ARE IN PRETTY GOOD AGREEMENT WITH THE SEVERE PARAMETERS. HAVE
WENT WITH THE GFS/ECMWF TIMING...SINCE THEY HAVE BEEN PRETTY GOOD
RECENTLY.
FOR THE FORECAST...HAVE WENT WITH THE MODEL PHYSICALS(GFS AND ECMWF)
FOR A START...ADJUSTING FROM THERE...SINCE STRAIGHT MOS TENDS TO NOT
HANDLE SOME THIS FAR ON THE EDGE OF IT'S FORECAST ENVELOPE VERY
WELL. FOR TEMPS...THIS IS A LEAN TOWARDS THE GFS MOS
NUMBERS...THOUGH WITH WATER TEMPS IN THE UPPER 60S TO AROUND
70...FEEL MOS IS TOO WARM ALONG AND CLOSE TO THE COAST.
SATURDAY THROUGH SUNDAY NIGHT...COLD FRONT WILL BE EAST OF DESTIN AT
SUNRISE SATURDAY WITH POSSIBLY A FEW SHOWERS LINGERING ALONG THE
EXTREME EASTERN ZONES. OTHERWISE SKIES WILL BE CLEARING OR ALREADY
CLEAR BY SUNRISE SATURDAY AS DRIER AIR FOLLOWS THE UPPER TROUGH
ACROSS THE FORECAST AREA. HIGHS MOSTLY IN THE MID AND UPPER 70S WITH
A MODERATE WEST WIND GRADUALLY BECOMING NORTHWEST AS THE SURFACE LOW
PULLS NORTH OVER THE GREAT LAKES. SURFACE HIGH WILL MOVE EAST ACROSS
THE AREA SATURDAY NIGHT BRINGING COOL TEMPERATURES AND LIGHT WINDS.
LOWS BY SUNDAY MORNING BETWEEN 45 AND 50 DEGREES. ANOTHER NICE DAY
ON SUNDAY AS THE SURFACE HIGH MOVES TO THE SOUTHEAST COAST AND
SOUTHEAST WINDS RETURN TO THE AREA. HIGH TEMPERATURES 75 TO 80
DEGREES. /11
.LONG TERM...(MONDAY THROUGH THURSDAY)H5 ZONAL FLOW ON MONDAY WILL
TURN MORE SOUTHWEST ON TUESDAY AS A TROUGH DEVELOP ON THE LEE SIDE
OF THE ROCKIES. THIS DRAWS BETTER MOISTURE INTO THE WESTERN HALF OF
THE AREA...BRINGING A SLIGHT CHANCE FOR SHOWERS AND THUNDERSTORMS
BACK INTO THE FORECAST FOR TUESDAY AND TUESDAY NIGHT AND A SLIGHT
CHANCE AREA WIDE ON WEDNESDAY. AN UPPER RIDGE JUST OFF THE SOUTHEAST
COAST WILL WEAKEN AND DIVERT THE UPPER TROUGH TO THE NORTHEAST WITH
THE ASSOCIATED FRONT STALLING BY MID WEEK WELL OFF TO THE NORTHWEST.
THE BETTER DEEP MOISTURE WILL BE SHUNTED ACROSS THE TENNESSEE VALLEY
AND ONLY EXPECT A SLIGHT CHANCE FOR SHOWERS OR THUNDERSTORMS OVER
THE EXTREME NORTHERN BOUNDARIES OF THE FORECAST AREA THROUGH THE
REMAINDER OF THE EXTENDED. HIGH TEMPERATURES BACK INTO THE MID AND
UPPER 80S MID TUESDAY INTO THURSDAY...AROUND 80 ON THE BEACHES. /11
&&
.AVIATION...(12Z ISSUANCE)SYSTEM MOVING EAST FROM OVER THE PLAINS TO
OVER THE OHIO RIVER VALLEY THROUGH THE FORECAST...VFR LEVEL STRATUS
OVERSPREADING THE AREA WILL SLOWLY LOWER OVER THE AREA AS SHRA/TSRA
INCREASE THROUGH THE DAY. A LINE OF TSRA IS CURRENTLY FORECAST TO
START MOVING OVER SE MISS THIS EVENING...WITH GUSTY WINDS LIKELY AS
THE LINE PASSES. WINDS BEHIND THE FRONT ARE EXPECTED TO BE A GENERAL
WESTERLY...AS THE FRONT GETS "WHIPPED" EASTWARD OVER THE FA...AS
APPOSED TO THE USUAL NW TO SE FRONTAL MOVEMENT.
&&
.MARINE...AHEAD OF A MODERATE TO STRONG FRONT MOVING EAST OVER THE
AREA THIS EVENING INTO THE OVERNIGHT HOURS...STRONG ONSHORE FLOW
WILL OVERSPREAD THE AREA TODAY. MODERATE TO STRONG WESTERLY FLOW
WILL FOLLOW THE FRONT...THEN SLOWLY TRANSITION TO NORTHWESTERLY
THROUGH SATURDAY...AS SURFACE HIGH PRESSURE MOVES TOWARDS THE AREA
FROM OVER THE SOUTHERN PLAINS AND THE FRONT MOVES SLOWLY EAST OF THE
AREA. GUIDANCE IS ADVERTISING THIS FLOW BEING MODERATE TO
STRONG...EVEN AS THE SURFACE HIGH PASSES NORTH OF THE AL/W-RN FL
COASTAL WATERS. GUIDANCE DOESN'T HAVE THE WINDS LIGHTENING UNTIL
SUNDAY...WHEN THE SURFACE HIGH MOVES EAST OF THE AREA AND THE
PRESSURE GRADIENT EASES. FOR SUNDAY INTO TUESDAY...ANOTHER UPPER
SYSTEM WILL MOVE OVER THE WESTERN CONUS TO OVER THE
PLAINS...ORGANIZING A FRONT OVER THE CENTRAL/SOUTHERN PLAINS MONDAY
AND TUESDAY AND STRENGTHENING THE ONSHORE FLOW AHEAD OF THIS FRONT
MOVING TOWARDS THE AREA ENOUGH TO KEEP THE FLOW LIGHT TO
MODERATE...BUT NOT QUITE ENOUGH TO MOVE OVER THE COASTAL WATERS
THROUGH NEXT WEEK AS THE SYSTEM PASSES WELL NORTH OF THE AREA.
/16
&&
.FIRE WEATHER...BREEZY SOUTHEAST WINDS TODAY WITH SCATTERED SHOWERS
AND THUNDERSTORMS THROUGH THE DAY...SOME STRONG TO
SEVERE...ESPECIALLY NORTH OF THE COASTAL ZONES. SQUALL LINE MOVING
FROM WEST TO EAST LATER TODAY SHOULD GIVE ALL AREAS A DECENT RAIN
WITH HEAVIEST AMOUNTS TO THE NORTH. COLD FRONT BRINGS DRIER AIR IN
FOR SATURDAY WITH LOWEST HUMIDITY 25 TO 30 PERCENT MOST AREAS. LOOKS
LIKE THE 20 FOOT WINDS WILL BE NEAR 15 MPH AND GUSTY WITH
DISPERSIONS ABOVE 75 OVER THE FLORIDA PANHANDLE. WILL INITIATE A
FIRE WEATHER WATCH WITH THIS PACKAGE FOR THE PANHANDLE. DRY AGAIN
SUNDAY BUT WITH LESS WIND AND LOWER DISPERSIONS. /11
&&
.PRELIMINARY POINT TEMPS/POPS...
MOBILE 80 59 77 50 / 70 70 10 05
PENSACOLA 79 65 78 55 / 50 60 10 05
DESTIN 74 69 76 57 / 30 60 20 05
EVERGREEN 81 58 78 46 / 60 80 10 05
WAYNESBORO 80 53 75 45 / 90 80 10 05
CAMDEN 80 55 76 45 / 70 80 10 10
CRESTVIEW 81 65 79 45 / 30 70 20 05
&&
.MOB WATCHES/WARNINGS/ADVISORIES...
AL...NONE.
FL...FIRE WEATHER WATCH FROM NOON SATURDAY TO 5 PM SATURDAY FOR THE
FOLLOWING ZONES: COASTAL ESCAMBIA...COASTAL OKALOOSA...COASTAL
SANTA ROSA...INLAND ESCAMBIA...INLAND OKALOOSA...AND INLAND
SANTA ROSA.
MS...NONE.
GM...SMALL CRAFT ADVISORY UNTIL 7 PM SATURDAY FOR THE FOLLOWING
ZONES: COASTAL WATERS FROM DESTIN TO PENSACOLA FL OUT 20
NM...COASTAL WATERS FROM PENSACOLA FL TO PASCAGOULA MS OUT
20 NM...MOBILE BAY...WATERS FROM DESTIN TO PENSACOLA FL
FROM 20 TO 60 NM...AND WATERS FROM PENSACOLA FL TO
PASCAGOULA MS FROM 20 TO 60 NM.
&&HAZARDOUS WEATHER OUTLOOK...CORRECTION NATIONAL WEATHER SERVICE MOBILE AL 545 AM CDT FRI APR 15 2011 ALZ051>064-FLZ001>006-GMZ630-650-655-670-675-MSZ067-075-076-078- 079-161200- CHOCTAW-WASHINGTON-CLARKE-WILCOX-MONROE-CONECUH-BUTLER-CRENSHAW- ESCAMBIA-COVINGTON-UPPER MOBILE-UPPER BALDWIN-LOWER MOBILE- LOWER BALDWIN-INLAND ESCAMBIA-COASTAL ESCAMBIA-INLAND SANTA ROSA- COASTAL SANTA ROSA-INLAND OKALOOSA-COASTAL OKALOOSA-MOBILE BAY- COASTAL WATERS FROM PENSACOLA FL TO PASCAGOULA MS OUT 20 NM- COASTAL WATERS FROM DESTIN TO PENSACOLA FL OUT 20 NM- WATERS FROM PENSACOLA FL TO PASCAGOULA MS FROM 20 TO 60 NM- WATERS FROM DESTIN TO PENSACOLA FL FROM 20 TO 60 NM-WAYNE-PERRY- GREENE-STONE-GEORGE- 545 AM CDT FRI APR 15 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL AND SOUTHWEST ALABAMA...NORTHWEST FLORIDA...SOUTHEAST MISSISSIPPI AND THE COASTAL WATERS OF ALABAMA AND NORTHWEST FLORIDA. .DAY ONE...TODAY AND TONIGHT A STRONG FRONT IS EXPECTED TO MOVE OVER SOUTHEAST MISSISSIPPI AROUND SUNSET AND MOVE EAST OF THE WESTERN FLORIDA PANHANDLE AND SOUTH-CENTRAL ALABAMA SHORTLY AFTER MIDNIGHT. A SQUALL LINE IS EXPECTED TO MOVE EAST WITH THE FRONT...BUT AHEAD OF THIS LINE...THERE WILL BE AN INCREASE IN COVERAGE AND INTENSITY OF SHOWERS AND THUNDERSTORMS THROUGH THE LATE MORNING AND AFTERNOON HOURS. WITH GOOD UPPER SUPPORT AND WIND SHEAR...ALONG WITH AN INCREASE IN INSTABILITY DURING THE DAY...THERE WILL BE AN INCREASED CHANCE FOR SOME OF THE THUNDERSTORMS TO BECOME STRONG TO SEVERE. CURRENTLY...THE STORM PREDICTION CENTER HAS A MODERATE RISK OF SEVERE WEATHER OVER THE AREA NORTH OF THE WESTERN FLORIDA PANHANDLE..A SLIGHT RISK OVER THE REST OF THE AREA. DAMAGING WINDS AND LARGE HAIL WILL BE THE PRIMARY THREAT...THOUGH WITH THE GOOD DIRECTIONAL AND SPEED WIND SHEAR...ISOLATED TORNADOES ARE POSSIBLE. STRONG ONSHORE FLOW WILL OVERSPREAD THE AREA THROUGH THE MORNING HOURS...INCREASING THE HAZARD FOR SMALL CRAFT THROUGH TONIGHT. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY MODERATE TO STRONG WINDS OVER THE MARINE AREA THROUGH SATURDAY WILL CONTINUE TO CREATE HAZARDOUS CONDITIONS FOR SMALL CRAFT. OVER THE WEEKEND AND INTO THE MIDDLE PART OF NEXT WEEK...NO SEVERE WEATHER IS ANTICIPATED AS HIGH PRESSURE DRIFTS EAST ACROSS THE REGION. .SPOTTER INFORMATION STATEMENT... ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT WILL LIKELY BE REQUIRED THIS AFTERNOON THROUGH THIS EVENING.
The Mobile radar (KMOB), 124 km away, was scanning. The volume nearest the first event began at 15:10 UTC.
4 tornado, 1 hail. Local standard time, as filed.
Tornado reported by EMA north of Strengthford near the Whistler area.
Several softwood trees twisted off at mid-section and some hardwood trees uprooted by a tornado along an 80 yard wide path. Tornado continued northeast into Wayne County.
The tornado continued northeast out of the State Line, Mississippi area. The National Weather Service Damage Survey Team observed a 100 yard wide path of trees snapped with some minor damage to to the roofing structure of a home. The tornado continued to the east crossing into Washington County, Alabama.
Golf ball size hail reported on Highway 63.
The National Weather Service aerial survey revealed a continuous long track tornado from just west of Leakesville, Mississippi to Deer Park, Alabama. The tornado touched down west of Leakesville south of Highway 57. It crossed the highway, strengthened to EF-3 intensity, and then turned east toward the city of Leakesville paralleling Highway 57. The tornado damaged 98 homes: 47 with minor damage, 28 with major damage, and 23 homes completely destroyed. 14 businesses were completely destroyed. One fatality occurred in a destroyed mobile home. In Mississippi, the tornado did an estimated 11.1 million dollars worth of property damage to homes and businesses. The tornado continued east northeast into extreme southwest Washington County, Alabama.
As the offices recorded each death: direct deaths were caused by the weather itself, indirect ones by something it set in motion.
| Event | Date | Age | Sex | Where | Kind |
|---|---|---|---|---|---|
| Tornado, Greene | 2011-04-15 | 57 | Female | Mobile/Trailer Home | Direct |
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Mississippi in 2011Every state in 2011This day in weather historyThe tornado archive for Mississippi, 2011Warnings in Mississippi, April 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: 297841, 297835, 297847, 297848, 296776.