Two pulse thunderstorms produced damaging winds. One storm was located in Oregon County near Alton, and the other storm was in Jasper County near Avilla.
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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.
Two pulse thunderstorms produced damaging winds. One storm was located in Oregon County near Alton, and the other storm was in Jasper County near Avilla.
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 Jun 26, 1:49 PM CST, 1 hour 41 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPRINGFIELD MO
249 PM CDT FRI JUN 26 2009
.DISCUSSION...
SHORT TERM (TONIGHT THROUGH SUNDAY)...
ANOTHER HOT DAY TODAY WITH THE THE UPPER LEVEL RIDGE REMAINING IN
PLACE. TEMPERATURES IN THE 90S COMBINED WITH DEWPOINTS IN THE 70S
HAVE PRODUCED HEAT INDEXES IN THE 100 TO 105 RANGE THIS AFTERNOON.
THIS WILL CONTINUE INTO SATURDAY AS THE RIDGE REMAINS OVER THE
REGION AND TEMPERATURES AND DEWPOINTS WARM SLIGHTLY. THUS LIKE
PREVIOUS SHIFTS HAVE CONTINUED THE HEAT ADVISORY THROUGH SATURDAY.
THE PATTERN THEN UNDERGOES SOME CHANGES LATE SATURDAY NIGHT INTO
EARLY SUNDAY AS THE UPPER LEVEL RIDGE SHIFTS WESTWARD. THE REGION
THEN COMES UNDER THE INFLUENCE OF NORTHWEST FLOW. A COLD FRONT
WILL MAKE ITS WAY INTO THE OZARKS BRINGING A CHANCE OF RAIN AND
THUNDERSTORMS. THE TIMING OF THE FRONT WILL DETERMINE THE STRENGTH
OF THE THUNDERSTORMS THAT DEVELOP. CURRENT MODELS HAVE THE FRONT
ACROSS THE REGION AROUND 06Z SUNDAY. IF IF MOVES A BIT QUICKER THE
STORMS MIGHT BE A BIT STRONGER AS THEY TAP INTO MORE INSTABILITY.
WITH THE TIME OF YEAR THOUGH IT MAY BE DIFFICULT TO SEE A REALLY
STRONG FRONT MAKE IT THIS FAR. SO WE WILL PROBABLY SEE A LINE OF
STORMS OR SQUALL LINE DEVELOP ALONG THE FRONT WITH THE STRONGEST
STORMS PRODUCING WINDS GUSTS TO 60 MPH AND MAYBE SOME HAIL TO
QUARTER SIZE. ONE OF THE MORE NOTABLE IMPACTS OF THE FRONTAL
PASSAGE WILL BE THE DRIER AIR MASS THAT FILTERS IN BEHIND THE
FRONT. THIS WILL HELP MITIGATE THE HIGH HEAT INDEXED AS DEWPOINTS
WILL BE LOWER THOUGH TEMPERATURES WILL LIKELY BE IN THE MID 80 FOR
SUNDAY WHICH WILL PROVIDE SOME MUCH NEEDED RELIEF FROM THE HEAT.
HATCH
LONG TERM (MONDAY THROUGH FRIDAY)...
THE ECMWF DIGS AN H5 LOW INTO THE GREAT LAKES REGION AT THE
BEGINNING OF THE PERIOD...CUTS IT OFF THROUGH THE PERIOD AND BEGINS
TO LIFT IT OUT AT THE END. THIS WILL CAUSE THE RIDGE CURRENTLY
SITTING OVER THE PLAINS TO RETROGRADE WESTWARD INTO THE ROCKIES.
THIS WILL BRING A COOLER AND SOMEWHAT DRIER AIR MASS INTO THE
REGION. DID ADJUST DAYTIME HIGHS DOWN A BIT ESPECIALLY IN THE
THURSDAY AND FRIDAY TIME FRAMES. H85 TEMPERATURES COOL DOWN INTO
THE MID TEENS...WHICH SHOULD PUT OUR DAYTIME HIGHS IN THE UPPER 80
TO LOWER 90 RANGE. TEMPERATURES OVERALL SHOULD RETURN TO MORE
SEASONABLE LEVELS. DRIER AIR WILL ALSO LOWER DAYTIME HEAT INDICES.
TEMPERATURES THEN BEGIN TO REBOUND ON FRIDAY AS THE UPPER LEVEL
RIDGE BEGINS TO BUILD BACK THURSDAY NIGHT INTO FRIDAY.
ALSO KEPT A DRY FORECAST THROUGH THE PERIOD. ECMWF PUSHES THE FRONT
INTO THE GULF STATES AND WASHES IT OUT AROUND MID WEEK.
GAEDE
&&
.AVIATION...
FOR THE 18Z TAFS...ANOTHER DAY UNDER THE INFLUENCE WILL PRODUCE
GENERALLY VFR CONDITIONS DURING MOST OF THE TAF PERIOD. THERE IS A
SLIGHT CHANCE THIS AFTERNOON OF A FEW AIRMASS TYPE THUNDERSTORMS
DEVELOPING NEAR THE TERMINAL. THESE STORMS COULD DEVELOP ALONG ONE
OF THE SEVERAL BOUNDARIES LEFT OVER FROM YESTERDAYS STORMS OR AN
AREA OF CONVERGENCE NOTED OVER THE OZARKS IN THE VISIBLE SATELLITE
IMAGE. WITH THE AMOUNT OF MOISTURE AVAILABLE THE TERMINALS SHOULD
SEE HAZE DIMINISH VISIBILITIES TO MVFR CONDITIONS FOR A BRIEF
PERIOD SATURDAY MORNING.
HATCH
&&
.SGF WATCHES/WARNINGS/ADVISORIES...
MO...HEAT ADVISORY UNTIL 10 PM CDT SATURDAY FOR MOZ055>058-066>071-
077>083-088>098-101>106.
KS...HEAT ADVISORY UNTIL 10 PM CDT SATURDAY FOR KSZ073-097-101.
&&HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SPRINGFIELD MO 1256 PM CDT FRI JUN 26 2009 KSZ073-097-101-MOZ055>058-066>071-077>083-088>098-101>106-271800- 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- 1256 PM CDT FRI JUN 26 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE MISSOURI OZARKS AND EXTREME SOUTHEAST KANSAS. .DAY ONE...THIS AFTERNOON AND TONIGHT. A HEAT ADVISORY IS IN EFFECT TODAY. HIGH TEMPERATURES IN THE MID 90S ALONG WITH HIGH HUMIDITY VALUES WILL RESULT IN AFTERNOON HEAT INDEX VALUES NEAR 105 DEGREES. ISOLATED THUNDERSTORMS WILL BE POSSIBLE DURING THE AFTERNOON AND EARLY EVENING HOURS. THUNDERSTORMS THAT DEVELOP WILL BE CAPABLE OF PRODUCING LOCALLY DAMAGING WINDS NEAR 60 MPH AND DIME SIZE HAIL. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. THE HEAT ADVISORY CONTINUES SATURDAY. HIGH TEMPERATURES IN THE MID TO UPPER 90S ALONG WITH HIGH HUMIDITY VALUES WILL RESULT IN AFTERNOON HEAT INDEX VALUES NEAR 105 DEGREES. STRONG TO SEVERE THUNDERSTORMS WILL BE POSSIBLE AS A COLD FRONT MOVES THROUGH THE CENTRAL OZARKS SATURDAY NIGHT AND INTO SOUTH CENTRAL MISSOURI SUNDAY MORNING. SOME THUNDERSTORMS COULD PRODUCE 60 MPH WINDS...QUARTER SIZE HAIL AND HEAVY RAIN WITH THE POTENTIAL OF LOCALIZED FLASH FLOODING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED THROUGH TONIGHT. && 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) HATCH
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SPRINGFIELD MO 429 PM CDT FRI JUN 26 2009 MOZ106-262200- OREGON MO- 429 PM CDT FRI JUN 26 2009 ...SIGNIFICANT WEATHER ALERT FOR SOUTHERN OREGON COUNTY UNTIL 500 PM CDT... AT 428 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 3 MILES EAST OF ALTON...OR 16 MILES NORTHEAST OF THAYER...MOVING SOUTHWEST AT 10 MPH. WINDS AROUND 50 MPH ARE EXPECTED WITH THIS STORM. LOCATIONS IMPACTED INCLUDE ALTON AND COUCH. PEOPLE IN SOUTHERN OREGON COUNTY...INCLUDING ALTON...SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR POSSIBLE WARNINGS AND BE PREPARED TO TAKE APPROPRIATE ACTION SHOULD SEVERE WEATHER THREATEN. WISE
The Springfield radar (KSGF), 196 km away, was scanning. The volume nearest the first event began at 21:29 UTC.
2 thunderstorm wind. Local standard time, as filed.
Thunderstorm wind gusts knocked over a large tree across County Road 125.
A pulse thunderstorm created downburst winds that caused damage to several trees, one vehicle, and one home. This damage occurred near the intersection of Incline Road and County Road 65.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Missouri in 2009Every state in 2009This day in weather historyWarnings in Missouri, June 2009
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: 181336, 181335.