Cold front from an upper level trough moved through the area and became the focus of thunderstorm development in the unstable warm sector.
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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.
Cold front from an upper level trough moved through the area and became the focus of thunderstorm development in the unstable warm sector.
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 27, 2:33 PM CST, 3 hours 17 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TOPEKA KS 333 PM CDT SAT JUN 27 2009 .DISCUSSION... LATEST WATER VAPOR IMAGERY SHOWING UPPER TROF AXIS PUSHING EAST ACROSS THE NORTHERN AND CENTRAL PLAINS. PLUME OF DEEP SUBTROPICAL MOISTURE WAS LOCATED BETWEEN THE TROF AND THE UPPER HIGH...FROM CENTRAL NEW MEXICO NORTHEAST INTO CENTRAL IOWA. COLD FRONT ASSOCIATED WITH THE UPPER TROF WAS THROUGH FROM ROUGHLY CEDAR RAPIDS IOWA TO GAGE OKLAHOMA. PREFRONTAL TROF AHEAD OF THE FRONT HAS KEPT CONVERGENCE FROM BEING VERY STRONG WITH THE FRONT WITH CONVECTION LARGELY LACKING WITH IT...AND CUMULUS NEARBY IS NOT LOOKING IMPRESSIVE. BAND OF ELEVATED CONVECTION OVER NORTHERN KANSAS FROM COLLOCATION OF UPPER TROF AND MID LEVEL MOISTURE WAS SLOWLY PUSHING SOUTH INTO THE CWA. AIRMASS AHEAD OF THE BOUNDARY IS QUITE UNSTABLE WITH AGAIN CAP REMAINING IN THE WARM AND MOIST AIRMASS. MAY YET SEE SCATTERED STORMS RESULT ALONG THE FRONT LATE THIS AFTERNOON AND INTO THE EARLY EVENING. ONE UPDRAFT MAY BE ENOUGH TO GENERATE AN OUTFLOW BOUNDARY TO DOMINO CONVECTION ON DOWNSTREAM IN THE UNIDIRECTIONAL WIND/STEEP LOW LEVEL LAPSE RATE ENVIRONMENT. ONGOING PRECIPITATION TO THE NORTH SHOULD SLOWLY DIMINISH AS Q-VECTOR CONVERGENCE WEAKENS WITH THE UPPER TROF/S PASSAGE. THE HIGH BASED NATURE OF THE PRECIPITATION IN THE DRYING LOW LEVELS MAY LIMIT MUCH ACCUMULATION AS WELL. CLEARING SKIES AND NORTHERLY WINDS THROUGH THE NIGHT WILL ALLOW FOR A NIGHT COOLER THAN HAS BEEN EXPERIENCED FOR SEVERAL DAYS. WEAK LOW LEVEL HIGH PRESSURE FOR SUNDAY WILL KEEP WINDS LIGHT...BUT BEGIN TO BRING WARM AIR BACK IN WESTERN AREAS DURING THE AFTERNOON...AND BUMPED UP TEMPS A BIT THERE AS A RESULT. HEAT INDICES WILL BE MUCH LOWER...AND THE EXCESSIVE HEAT WARNING IS ON TRACK TO EXPIRE EARLY THIS EVENING. 65 FOR MONDAY THROUGH NEXT SATURDAY...MODELS HAVE STARTED TRENDING TOWARDS A NORTHWESTERLY FLOW PREVAILING THROUGH THE PERIOD. A SLIGHTLY DRYER AIRMASS IS ANTICIPATED TO BE IN PLACE FOR SUNDAY NIGHT THROUGH WEDNESDAY. WITH MID LEVEL TEMPS REMAINING WARM...THE BOUNDARY LAYER IS PROGGED BY FORECAST SOUNDINGS TO REMAIN CAPPED. THEREFORE HAVE CONTINUED WITH A DRY FORECAST. WITH LOWER HEIGHTS AND A NORTHEAST OR EASTERLY COMPONENT TO THE SFC WINDS...TEMPS SHOULD BE CLOSER TO NORMAL FOR THIS TIME OF YEAR WITH UPPER 80S AND LOWER 90S FORECAST FOR HIGHS AND 60S EXPECTED FOR LOWS. THE ONE THING TO LOOK OUT FOR IS POSSIBILITY FOR SOME ELEVATED CONVECTION DEVELOPING SUNDAY NIGHT AND MONDAY NIGHT AS MODELS SHOW SOME MID LEVEL MOISTURE WITHIN A WEAK WAA PATTERN. CONFIDENCE IN LIFT FROM WAA IS TO LOW TO INCLUDE POPS AT THIS TIME. LATER IN THE WEEK...DEEPER MOISTURE COULD MOVE BACK INTO THE REGION WITH NORTHWEST FLOW CONTINUING. IT WOULD BE EASY TO ADD SLIGHT CHANCE POPS TO EACH PERIOD OF THE FORECAST FOR THURSDAY THROUGH SATURDAY WITH THE INCREASED MOISTURE. HOWEVER DO NOT HAVE MUCH CONFIDENCE AT ALL IN THE SHORTWAVE DETAILS OF THE MODELS. SO RATHER THAN SPREAD POPS THROUGH THE EXTENDED FORECAST...OPTED TO KEEP POPS AT 10 PERCENT AND MAKE ADJUSTMENTS AS THINGS BECOME MORE CLEAR. ONE NOTE FROM THE GFS THOUGH IS THAT IT HAS FOR THREE RUNS NOW BROUGHT A WEAK WAVE OVER PARTS OF NORTHEAST KS WEDNESDAY NIGHT. IF THIS TREND CONTINUES...POPS MAY NEED TO BE INCREASED. WOLTERS && .AVIATION... FRONTAL PASSAGE ALREADY OCCURRING AT MHK...AND APPEARS IT WILL REACH TOP AND FOE AROUND 21Z. MAY BE ENOUGH CONVERGENCE AND WEAKENING CAP FOR THUNDERSTORMS TO DEVELOP ALONG THE FRONT AT TOP AND FOE...BUT THEYD LIKELY BE ISOLATED AND WILL KEEP VCTS INTACT. ELEVATED SHRA TO THE NORTHWEST MAY AFFECT THE TERMINALS AS WELL...BUT PASSAGE OF WEAK UPPER WAVE MAY LIMIT THEIR EFFECTS TO MHK. EXPECT PRECIPITATION TO EXIT EARLY THIS EVENING AT ALL SITES...WITH NORTH WINDS AND VFR CONDITIONS DOMINATING. 65 && .TOP WATCHES/WARNINGS/ADVISORIES... EXCESSIVE HEAT WARNING UNTIL 7 PM THIS EVENING SOUTHEAST OF A LINE FROM HOLTON TO COUNCIL GROVE. KSZ024-026-037>040-054>056-058-059. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TOPEKA KS 353 PM CDT SAT JUN 27 2009 KSZ008>012-020>024-026-034>040-054>056-058-059-282100- REPUBLIC-WASHINGTON-MARSHALL-NEMAHA-BROWN-CLOUD-CLAY-RILEY- POTTAWATOMIE-JACKSON-JEFFERSON-OTTAWA-DICKINSON-GEARY-MORRIS- WABAUNSEE-SHAWNEE-DOUGLAS-LYON-OSAGE-FRANKLIN-COFFEY-ANDERSON- 353 PM CDT SAT JUN 27 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL...NORTH CENTRAL AND NORTHEAST KANSAS. .DAY ONE...THIS AFTERNOON AND TONIGHT HIGH LEVELS OF HEAT AND HUMIDITY WILL CONTINUE INTO THE LATE AFTERNOON FOR EAST CENTRAL KANSAS...WHERE AN EXCESSIVE HEAT WARNING IS IN EFFECT. THUNDERSTORMS ARE POSSIBLE ALONG AND SOUTH OF INTERSTATE 35 INTO THE EARLY EVENING. A FEW OF THE STORMS COULD BE SEVERE...WITH HAIL AROUND THE SIZE OF A QUARTER AND DAMAGING WINDS BEING THE PRIMARY HAZARDS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... A FEW SPOTTERS MAY BE NEEDED INTO THE EARLY EVENING HOURS IN EAST CENTRAL KANSAS.
The Pleasant Hill radar (KEAX), 95 km away, was scanning. The volume nearest the first event began at 23:50 UTC.
1 hail. Local standard time, as filed.
Spotter was driving on Hwy 59 between Princeton and Richmond and pulled over due to heavy rain and hail stones estimated to be as large as quarters.
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: 181241.