Thunderstorms developed during the late evening hours of June 14th and continued into the overnight hours into early morning on June 15th. The storms produced flash flooding across parts of Northeast Kansas.
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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 TOP wrote it up.
Thunderstorms developed during the late evening hours of June 14th and continued into the overnight hours into early morning on June 15th. The storms produced flash flooding across parts of Northeast Kansas.
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 Topeka, KS wrote its last area forecast discussion before the first event at Jun 15, 2:04 AM CST, 1 hour 11 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TOPEKA KS 304 AM CDT MON JUN 15 2009 .DISCUSSION... CONVECTION ONGOING ATTM...WITH CELLS IN CTRL KS GETTING A BOOST FROM LLJ WHICH PER PROFILERS AT 06Z HAD INCREASED TO 45KTS FROM THE SOUTHWEST. NORTHEASTERN STORMS APPEAR ISENTROPIC IN NATURE...ALSO AIDED IN PART BY SHORTWAVE MOVING ACROSS CTRL KS ATTM. CONVECTION TO THE SOUTH NEAR WINFIELD HAD BEEN ROOTED IN BETTER INSTABILITY WHICH LIES ACROSS THE SOUTHERN PORTION OF THE STATE IN THE WARM SECTOR. EXPECT ONGOING CONVECTION TO CONTINUE AS LLJ VEERS TO THE WEST SOUTHWEST IN THE EARLY MORNING HOURS. THINK STORMS IN CTRL KS HAVE BEST CHANCE OF MOVING EAST AS INDICATED BY STORM PROPAGATION VECTORS...WHILE STORMS ACROSS NW KS MAY HAVE BEEN OUTRUN BY THE SHORTWAVE ALOFT. ARE STILL SEEING ECHOES DEVELOP ACROSS CTRL KS HOWEVER...AND THESE STORMS WILL ALSO MOVE EAST TO SOUTHEAST INTO THE CWA. INSTABILITY ISNT TREMENDOUS WITH 1000-2000J/KG CAPE IN PLACE WITH MID LEVEL LAPSE RATES AROUND 6C/KM. HOWEVER SHEAR IS DECENT WITH 30-40KTS ABLE TO KEEP STORMS ROTATING ENOUGH TO BRING A HAIL AND DOWNDRAFT WIND THREAT INTO THE MORNING HOURS. THINK SYSTEM WILL BE IN THE EASTERN COUNTIES BY MID MORNING AND MAKING AN EXIT BY AFTERNOON WITH SUBSIDENCE BEHIND THE WAVE. IF WE CAN CLEAR FAST ENOUGH COULD GET SOME ADDITIONAL DESTABILIZATION FROM SOME AFTERNOON SUNSHINE. PRECIP FOR TONIGHT WILL DEPEND ON WHERE CONVECTION AND RESULTANT BOUNDARIES END UP TODAY. WITH SEVERAL SHORTWAVES IN THE MEAN FLOW...WILL NEED TO WATCH MESOSCALE FEATURES FOR DEVELOPMENT. TRIPLE POINT NEAR THE SURFACE LOW IN WESTERN KS WILL BE ONE SPOT TO WATCH...AND WILL NEED TO SEE WHERE FRONTAL BOUNDARY ENDS UP TO DETERMINE HOW FAR NORTH OR SOUTH OF THE LOW PRECIP WILL DEVELOP. THIS CONVECTION IS EXPECTED TO MOVE EASTWARD WITH A PUSH FROM A STRONGER SHORTWAVE ACROSS THE CENTRAL PLAINS. WILL BE DIFFICULT TO PICK THE BEST SPOT AT THIS TIME AND WILL KEEP HIGH CHANCE POPS ACROSS THE AREA IN THE 0-12Z TIMEFRAME...AND DIMINISH TO A SLIGHT CHANCE DURING THE DAYTIME HOURS AS SYSTEM MOVES EASTWARD. WED/THURS...KEPT A LINGERING POP FOR THE SOUTHERN HALF AS FRONT SLIDES SOUTH THEN DISSIPATES IN STRENGTHENING SOUTHERLY FLOW AHEAD OF INCREASING SOUTHWESTERLY FLOW ALOFT OVER THE ROCKIES. THIS SHOULD ALLOW THE EML TO SLIDE BACK OVER THE AREA AND KEEP PRECIP CHANCES AT BAY...AND ALSO BRING A RISE IN HIGH TEMPERATURES. NO CHANGES MADE BEYOND THURSDAY. 67 && .AVIATION... PRIMARY FORECAST CONCERN LIES WITH CONVECTION EARLY THIS MORNING. VFR CONDITIONS START THE PERIOD...BUT DEVELOPING COMPLEX IN CENTRAL KANSAS WILL PUSH EASTWARD. MVFR VIS/CIG RESTRICTIONS ANTICIPATED WITH TSRA...POTENTIALLY LOWER WITH MORE ROBUST CONVECTION. VFR CIGS WILL RETURN WITH SUBSIDENCE BEHIND THE COMPLEX...BUT MODELS DEPICT LINGERING LOW LEVEL MOISTURE AFTER 18Z. WILL MAINTAIN SCT030 MENTION...BUT WILL WATCH FOR MVFR CIG POTENTIAL IN THAT TIME FRAME. BLAIR/LUNDE && .TOP WATCHES/WARNINGS/ADVISORIES...NONE. &&
HAZARDOUS WEATHER OUTLOOK...CORRECTED TO ADD INFO TO LAST PARAGRAPH NATIONAL WEATHER SERVICE TOPEKA KS 258 PM CDT SUN JUN 14 2009 KSZ008>012-020>024-026-034>040-054>056-058-059-151400- REPUBLIC-WASHINGTON-MARSHALL-NEMAHA-BROWN-CLOUD-CLAY-RILEY- POTTAWATOMIE-JACKSON-JEFFERSON-OTTAWA-DICKINSON-GEARY-MORRIS- WABAUNSEE-SHAWNEE-DOUGLAS-LYON-OSAGE-FRANKLIN-COFFEY-ANDERSON- 258 PM CDT SUN JUN 14 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL...NORTH CENTRAL AND NORTHEAST KANSAS. .DAY ONE...THIS AFTERNOON AND TONIGHT THUNDERSTORMS ARE EXPECTED TO DEVELOP TONIGHT ACROSS THE OUTLOOK AREA...SOME OF THE STORMS MAY BE SEVERE WITH STRONG WINDS...LARGE HAIL AND LOCALLY HEAVY RAINFALL POSSIBLE. THE LOCALLY HEAVY RAINFALL COULD LEAD TO FLOODING OR FLASH FLOODING LATER TONIGHT. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THUNDERSTORMS WILL BE POSSIBLE MONDAY MAINLY DURING THE MORNING HOURS. HOWEVER...THUNDERSTORMS ARE EXPECTED TO DEVELOP ONCE AGAIN ACROSS THE CENTRAL PLAINS ON MONDAY NIGHT AND AGAIN TUESDAY NIGHT. THE LOCATION AND TRACK OF THESE THUNDERSTORM COMPLEXES ARE UNCERTAIN AT THIS TIME. IF THESE STORMS MOVE ACROSS THE OUTLOOK AREA THEY MAY BE STRONG TO SEVERE...WITH LARGE HAIL AND DAMAGING STRAIGHT LINE WINDS THE PRIMARY HAZARDS. LOCALLY HEAVY RAINFALL WILL ALSO BE A CONCERN...ESPECIALLY IF STORMS MOVE REPEATEDLY OVER THE SAME AREA. THERE WILL BE ANOTHER POSSIBILITY OF THUNDERSTORMS THURSDAY NIGHT ACROSS THE OUTLOOK AREA. .SPOTTER INFORMATION STATEMENT... SPOTTERS MAY BE NEEDED TONIGHT.
The Topeka radar (KTWX), 128 km away, was scanning. The volume nearest the first event began at 09:16 UTC.
1 flash flood. Local standard time, as filed.
Overnight thunderstorms produced flash flooding across parts of Brown County Kansas. Parts of Prairie road between 310 and 340 north were barricaded due to water over the road in Brown County.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Kansas in 2009Every state in 2009This day in weather historyWarnings in Kansas, 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: 177381.