Scattered thunderstorms developed across eastern Kansas during the late evening of April 8th. These storms then spread and developed into the Missouri Ozarks during the overnight hours.
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 SGF wrote it up.
Scattered thunderstorms developed across eastern Kansas during the late evening of April 8th. These storms then spread and developed into the Missouri Ozarks during the overnight hours. A second round of widely scattered storms developed around dawn on the morning of April 9th across southern Missouri. These storms developed along what appeared to be a remnant boundary from previous convection.
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 Springfield, MO wrote its last area forecast discussion before the first event at Apr 9, 2:23 AM CST, 12 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SPRINGFIELD MO 323 AM CDT SAT APR 9 2011 .DISCUSSION... MAIN CONCERNS FOR THIS FORECAST CONTINUE TO FOCUS ON THE POTENTIAL FOR STRONG TO SEVERE THUNDERSTORMS MOVING ACROSS THE OZARKS THIS MORNING...NEAR RECORD TEMPERATURES FOR SATURDAY...ANOTHER ROUND OF SEVERE STORMS FOR SUNDAY AND THEN AGAIN FOR THE MIDDLE OF NEXT WEEK. STRONG TO BORDERLINE SEVERE THUNDERSTORMS MOVING ACROSS THE REGION THIS MORNING ARE TAPPING INTO A FAIRLY MOIST AIRMASS WITH CONTINUING STRONG MOISTURE ADVECTION INTO THE REGION. RATHER STRONG ISENTROPIC UPGLIDE ACROSS SOUTHWESTERN MISSOURI...NEARLY COINCIDENT WITH THE ONGOING CONVECTION WILL SHIFT EAST NORTHEASTWARD THROUGH THE MORNING HOURS. SURFACE DEW POINT DEPRESSIONS OF 5 TO 10 DEGREES WOULD SUGGEST THE POTENTIAL FOR STRONG WIND GUST TO 40MPH AND SMALL HAIL WILL CONTINUE TO BE THE PRIMARY MODE FOR THESE STORMS. IN ADDITION...STORMS ARE WELL INTO THE WARM SECTOR WITH THE STATIONARY FRONT LOCATED NEARLY ALONG THE I-70 CORRIDOR. WOULD EXPECT THE STRONGEST STORMS TO DEVELOP MORE ALONG AND NORTH OF THE FRONTAL BOUNDARY AS A RESULT. STORMS WILL CONTINUE TO MOVE EASTWARD THIS MORNING. DID NOTE THE GOOD PRESSURE FALLS ACROSS SOUTHEASTERN KANSAS AND INTO WEST CENTRAL MISSOURI ON THE BACK SIDE OF THE STORMS. MAY BE INDICATIONS OF A DEVELOPING MESO-LOW BUT WILL NEED TO MONITOR THIS AS THE STORMS MOVE ACROSS THE AREA. FOR TODAY...CONTINUING STRONG MOISTURE AND WARM AIR ADVECTION FROM THE GULF REGION WILL KEEP THE REGION RATHER WARM FOR THE TIME OF YEAR WITH THE POTENTIAL TO SEE ADDITIONAL RECORD HIGHS SIMILAR TO WHAT THE REGION SAW IN VICHY/ROLLA AND JOPLIN FRIDAY. WITH 850MB TEMPERATURES IN THE 20 TO 22 DEGREE RANGE WOULD EXPECT TO SEE TEMPERATURES CLIMB INTO THE MID 80S THIS AFTERNOON. THIS WILL ONCE AGAIN SET THE STAGE FOR STORMS TO MOVE ACROSS THE REGION SUNDAY. A STRONG UPPER LEVEL SYSTEM NOW OVER THE WESTERN CONUS WILL MOVE INTO THE PLAINS ON SUNDAY AND TAKE AIM AT THE REGION. AS THIS UPPER LEVEL SYSTEM MOVES INTO THE PLAINS...A COLD FRONT WILL BEGIN TO PUSH EAST ACROSS KANSAS. IN ADVANCE OF THE COLD FRONT...A DRY LINE WILL WORK TO KICK OFF THUNDERSTORMS SUNDAY AFTERNOON WITH LIKELY STORM INITIATION ACROSS EASTERN KANSAS AND OKLAHOMA. WITH PLENTY OF MOISTURE IN PLACE ALONG WITH 65 TO 80 KTS OF 0-6KM BULK SHEAR...MORE THAN SUFFICIENT SHEAR AVAILABLE FOR SEVERE THUNDERSTORM DEVELOPMENT. THE COMBINATION OF AN ABUNDANTLY MOIST AIR...A FAST MOVING SYSTEM...A DRY LINE/COLD FRONT MOVING THROUGH THE REGION AND MORE THAN SUFFICIENT 0-6KM BULK SHEAR AND GOOD THETA-E DIFFERENTIAL AROUND 20K...WILL PRODUCE THE POTENTIAL FOR SEVERE THUNDERSTORMS. THE STORMS WOULD LIKELY PRODUCE LARGE HAIL...THOUGH THE PRIMARY THREAT LOOKS TO BE SIGNIFICANT HIGH WINDS WITH AN ISOLATED TORNADO NOT OUT OF THE QUESTION...ESPECIALLY EARLY IN THE STORM DEVELOPMENT WHEN DISCREET CELLS WOULD BE MOST PREVALENT. THOUGH THE INITIAL MODE MAY BE DISCREET CELLS...THINK THAT THE SYSTEM WILL DEVELOP INTO A STRONGLY FORCED LINE QUICKLY. IN THE WAKE OF THE STORM ON SUNDAY UPPER LEVEL RIDGING WILL BRING A RETURN OF SUNNY SKIES AND MORE MILD CONDITIONS FOR THE START OF THE WORK WEEK. A COOLER SURFACE HIGH WILL MOVE OVER THE REGION WITH AFTERNOON TEMPERATURES IN THE UPPER 60S TO LOWER 70S LIKELY FOR HIGHS. THIS UPPER RIDGE WILL BE RELATIVELY SHORT LIVED AS ANOTHER UPPER LEVEL TROUGH AND STORM SYSTEM WILL MOVE INTO THE WESTERN STATES AND MOVE INTO THE PLAINS THURSDAY WITH MODELS IN BETTER AGREEMENT ON TIMING AND STRENGTH TODAY THAN THEY HAD BEEN THE LAST FEW RUNS. HATCH && .AVIATION... /ISSUED 1230 AM CDT SAT APR 9 2011/ FOR THE 06Z TAF PACKAGE...PRIMARY CHALLENGE CONTINUES TO BE SHRA/TSRA CHANCES OVERNIGHT. TO THIS POINT...ACTIVITY HAS BEEN SLOW TO MOVE EASTWARD OUT OF KS. THIS HAS CHANGED IN THE PAST HOUR OR SO AS REGIONAL RADAR INDICATES AN EXPANSION AND EASTWARD PROGRESSION OF SHRA/TSRA WNW OF KJLN. SHOULD CONTINUE TO SEE ACTIVITY EXPAND INTO JLN/SGF AERODROMES OVERNIGHT...AND HAVE INCLUDED TEMPOS TO COVER THE WINDOW OF OPPORTUNITY. STILL LOOKS AS THOUGH ACTIVITY WILL REMAIN NORTH OF BBG AND CONTINUE TO COVER THE LOWER RISK OF TSRA THERE WITH CB WORDING. SHRA/TSRA WILL PROGRESSIVELY EXIT TO THE EAST BY DAYBREAK LEADING TO A CLEARING SKY. WINDS WILL BE GUSTY DURING THE DAY SATURDAY...OTHERWISE CONDITIONS WILL BE QUIET THROUGH THE END OF THE TAF CYCLE. GAGAN && .SGF WATCHES/WARNINGS/ADVISORIES... MO...NONE. KS...NONE. &&
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE SPRINGFIELD MO 253 AM CDT SAT APR 9 2011 KSZ073-097-101-MOZ055>058-066>071-077>083-088>098-101>106-100800- BOURBON-CRAWFORD-CHEROKEE-BENTON-MORGAN-MILLER-MARIES-VERNON- ST. CLAIR-HICKORY-CAMDEN-PULASKI-PHELPS-BARTON-CEDAR-POLK-DALLAS- LACLEDE-TEXAS-DENT-JASPER-DADE-GREENE-WEBSTER-WRIGHT-NEWTON- LAWRENCE-CHRISTIAN-DOUGLAS-HOWELL-SHANNON-MCDONALD-BARRY-STONE- TANEY-OZARK-OREGON- 253 AM CDT SAT APR 9 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE MISSOURI OZARKS AND EXTREME SOUTHEAST KANSAS. .DAY ONE...TONIGHT. THE HAZARDOUS WEATHER RISK LEVEL IS...ELEVATED. WEATHER HAZARDS EXPECTED... ELEVATED RISK OF HAIL. ELEVATED RISK OF DAMAGING THUNDERSTORM WINDS. ELEVATED RISK OF LIGHTNING. LIMITED RISK OF FLOODING. DISCUSSION... THUNDERSTORMS WILL CONTINUE TO DEVELOP ROUGHLY ALONG AND SOUTH OF THE INTERSTATE 44 CORRIDOR. THIS ACTIVITY WILL CONTINUE TO MOVE EAST ACROSS MUCH OF SOUTHERN MISSOURI THE REST OF TONIGHT. THE PRIMARY SEVERE WEATHER RISK WILL BE LARGE HAIL TO THE SIZE OF QUARTERS...WITH A LOCALIZED RISK FOR DAMAGING WIND GUSTS. OVERALL...THE SEVERE THUNDERSTORM RISK IS DECREASING FOR THE REST OF TONIGHT. IN ADDITION...LOCALLY HEAVY RAINFALL AND LOCALIZED FLOODING WILL BE POSSIBLE ESPECIALLY WHERE STORMS TRAIN OVER THE SAME AREAS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. STRONG TO SEVERE STORMS ARE EXPECTED ACROSS THE OUTLOOK AREA SUNDAY AFTERNOON AND EVENING AS A STRONG STORM SYSTEM MOVES INTO THE PLAINS. THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG AND AHEAD OF A DRY LINE THAT WILL MOVE EAST FROM KANSAS AND OKLAHOMA. MODERATE INSTABILITY AND STRONG VERTICAL WIND SHEAR WILL ALLOW FOR SEVERE STORM ORGANIZATION WITH THE POTENTIAL OF LARGE HAIL AND DAMAGING WINDS. THE RISK FOR TORNADOES CANNOT BE RULED OUT. GUSTY NON THUNDERSTORM WINDS ARE ALSO EXPECTED AT TIMES SATURDAY...SUNDAY...AND MONDAY. AN ELEVATED FIRE DANGER MAY EXIST SUNDAY DEPENDING ON THE TIMING OF THE DRY LINE PASSAGE. LOW HUMIDITY AND MODERATELY GUSTY WINDS MAY PRODUCE AN ELEVATED FIRE DANGER MONDAY IN SOME AREAS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED ALONG AND NORTH OF THE HIGHWAY 60 CORRIDOR THROUGH 4 AM. && THIS PRODUCT IS NOW AVAILABLE IN GRAPHICAL FORMAT...ALONG WITH OTHER WEATHER...HYDROLOGICAL AND CLIMATE INFORMATION...AT HTTP://WWW.CRH.NOAA.GOV/SGF(ALL LOWERCASE) GAGAN
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
132 AM CDT SAT APR 9 2011
MOZ077-088-090700-
JASPER MO-BARTON MO-
132 AM CDT SAT APR 9 2011
...SIGNIFICANT WEATHER ALERT FOR BARTON AND NORTHERN JASPER COUNTIES
UNTIL 200 AM CDT...
AT 130 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM MILFORD TO BOSTON TO
3 MILES NORTHEAST OF ASBURY...MOVING EAST AT 35 MPH. PENNY SIZE
HAIL...AND WINDS AROUND 50 MPH ARE EXPECTED WITH THESE STORMS.
LOCATIONS IMPACTED INCLUDE ASBURY...BOSTON...CARYTOWN...DUDENVILLE...
GOLDEN CITY...IANTHA...IRWIN...JASPER...KENOMA...LAMAR HEIGHTS...
LAMAR...MILFORD...MINDENMINES...NASHVILLE...OAKTON AND VERDELLA.
IF YOU ARE IN THE PATH OF THESE STORMS...SEEK SHELTER INDOORS AND
STAY AWAY FROM WINDOWS.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM CDT
SATURDAY MORNING FOR SOUTHEAST KANSAS AND SOUTHERN MISSOURI.
LAT...LON 3747 9461 3765 9439 3763 9408 3729 9409
3729 9408 3725 9418 3727 9462
TIME...MOT...LOC 0633Z 265DEG 32KT 3755 9413 3738 9423
3730 9452
SCHAUMANNSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
249 AM CDT SAT APR 9 2011
MOZ088-093-094-101-102-090830-
LAWRENCE MO-JASPER MO-NEWTON MO-BARRY MO-MCDONALD MO-
249 AM CDT SAT APR 9 2011
...SIGNIFICANT WEATHER ALERT FOR LAWRENCE...NEWTON...NORTHERN
BARRY...NORTHERN MCDONALD AND SOUTHERN JASPER COUNTIES UNTIL 330 AM
CDT...
AT 244 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 5 MILES NORTHEAST OF
FIDELITY TO NEOSHO TO 9 MILES SOUTHWEST OF SENECA...MOVING EAST AT 40
MPH. NICKEL SIZE HAIL...AND WINDS AROUND 50 MPH ARE EXPECTED WITH
THESE STORMS.
LOCATIONS IMPACTED INCLUDE AIRPORT DRIVE...AURORA...CARTERVILLE...
CARTHAGE...DIAMOND...DUENWEG...DUQUESNE...FAIRVIEW...GOODMAN...
GRANBY...IRON GATES...JOPLIN...LEAWOOD...MONETT...MOUNT VERNON...
NEOSHO...PIERCE CITY...PURDY...SAGINAW...SARCOXIE...SENECA...SHOAL
CREEK DRIVE...SILVER CREEK...VERONA...WEBB CITY AND WHEATON.
INTERSTATE 44 BETWEEN MILE MARKERS 4 AND 57 WILL ALSO BE IMPACTED BY
THESE STORMS.
IF YOU ARE IN THE PATH OF THESE STORMS...SEEK SHELTER INDOORS AND
STAY AWAY FROM WINDOWS.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM CDT
SATURDAY MORNING FOR SOUTHEAST KANSAS AND SOUTHERN MISSOURI.
LAT...LON 3688 9463 3718 9455 3720 9364 3671 9368
3669 9463
TIME...MOT...LOC 0749Z 266DEG 37KT 3712 9419 3687 9434
3673 9463
SCHAUMANNSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
328 AM CDT SAT APR 9 2011
MOZ093-101-102-090915-
NEWTON MO-BARRY MO-MCDONALD MO-
328 AM CDT SAT APR 9 2011
...SIGNIFICANT WEATHER ALERT FOR BARRY...MCDONALD AND SOUTHERN NEWTON
COUNTIES UNTIL 415 AM CDT...
AT 325 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 4 MILES SOUTHWEST OF
GRANBY TO 5 MILES SOUTHEAST OF GOODMAN TO 5 MILES SOUTHEAST OF SOUTH
WEST CITY...MOVING EAST AT 40 MPH. PENNY SIZE HAIL...AND WINDS AROUND
50 MPH ARE EXPECTED WITH THESE STORMS.
LOCATIONS IMPACTED INCLUDE ANDERSON...CASSVILLE...EXETER...
FAIRVIEW...GOODMAN...GRANBY...LANAGAN...MONETT...NEOSHO...NOEL...
PINEVILLE...PURDY...SELIGMAN...SOUTH WEST CITY...WASHBURN AND
WHEATON.
OTHER LOCATIONS IN THIS SIGNIFICANT WEATHER ALERT INCLUDE ROARING
RIVER STATE PARK AND TABLE ROCK LAKE.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM CDT
SATURDAY MORNING FOR SOUTHEAST KANSAS AND PORTIONS OF SOUTHERN
MISSOURI.
LAT...LON 3650 9462 3656 9463 3693 9450 3692 9363
3670 9362 3649 9381 3648 9457
TIME...MOT...LOC 0827Z 270DEG 35KT 3688 9428 3670 9430
3648 9450
SCHAUMANNSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
335 AM CDT SAT APR 9 2011
MOZ095-103-104-090915-
STONE MO-CHRISTIAN MO-TANEY MO-
335 AM CDT SAT APR 9 2011
...SIGNIFICANT WEATHER ALERT FOR CHRISTIAN...NORTHERN STONE AND
NORTHERN TANEY COUNTIES UNTIL 415 AM CDT...
AT 329 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 3 MILES WEST OF
BILLINGS TO CRANE TO 11 MILES WEST OF CAPE FAIR...MOVING EAST AT 40
MPH. PENNY SIZE HAIL...AND WINDS AROUND 50 MPH ARE EXPECTED WITH
THESE STORMS.
LOCATIONS IMPACTED INCLUDE BILLINGS...BRANSON WEST...CLEVER...
CRANE...GALENA...HIGHLANDVILLE...MERRIAM WOODS...NIXA...
OZARK...REEDS SPRING...ROCKAWAY BEACH...SPARTA AND TANEYVILLE.
OTHER LOCATIONS IN THIS SIGNIFICANT WEATHER ALERT INCLUDE TABLE ROCK
LAKE.
THUNDERSTORMS POSE A VARIETY OF HAZARDS TO THOSE OUTDOORS...INCLUDING
HAIL... STRONG WINDS THAT CAN CREATE DANGEROUS FLYING PROJECTILES AND
DEBRIS...AS WELL AS DEADLY CLOUD TO GROUND LIGHTNING. IF YOU ARE IN
THE PATH OF THESE STORMS...MOVE INDOORS TO A STURDY SHELTER
IMMEDIATELY.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM CDT
SATURDAY MORNING FOR SOUTHEAST KANSAS AND PORTIONS OF SOUTHERN
MISSOURI.
LAT...LON 3669 9358 3682 9359 3683 9363 3709 9361
3709 9298 3708 9292 3669 9291
TIME...MOT...LOC 0834Z 259DEG 34KT 3706 9355 3690 9355
3677 9365
SCHAUMANNThe Springfield radar (KSGF), 13 km away, was scanning. The volume nearest the first event began at 08:34 UTC.
5 hail, 1 thunderstorm wind. Local standard time, as filed.
A few sheds were damaged at the Lowes in Republic. The winds were estimated at 50 mph.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Missouri in 2011Every state in 2011This day in weather historyWarnings in Missouri, 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: 285361, 284537, 284538, 284539, 284540, 284541.