A stalled frontal boundary, combined with an upper level disturbance, caused the first of several rounds of convections across the region, during the morning hours of June 12, 2010. Heavy rains caused several reports of flash flooding.
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 EAX wrote it up.
A stalled frontal boundary, combined with an upper level disturbance, caused the first of several rounds of convections across the region, during the morning hours of June 12, 2010. Heavy rains caused several reports of flash flooding.
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 Kansas City, MO wrote its last area forecast discussion before the first event at Jun 12, 5:42 AM CST, 4 hours 2 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO 642 AM CDT SAT JUN 12 2010 ...UPDATED AVIATION DISCUSSION... .DISCUSSION... /400 AM CDT SAT JUN 12 2010/ HIGH PLAINS CONVECTION HAS ONCE AGAIN CONGEALED INTO A WELL DEVELOPED MCS ACROSS CNTRL/ERN NEBRASKA...WITH REGIONAL RADAR IMAGERY ALREADY INDICATING MCV GENERATION WITHIN THE COLDER IR CLOUD TOPS. WARM ADVECTION-TYPE WING OF ELEVATED CONVECTION HAS RAPIDLY BLOSSOMED DOWNSTREAM ACROSS IOWA ALONG AND NORTH OF THE H7 +11C ISOTHERM AND PRIMARY SYNOPTIC BOUNDARY...WHILE FURTHER WEST CONVECTIVE GENERATED OUTFLOW ACROSS NRN KANSAS HAS BECOME THE FOCUS FOR ADDITIONAL LIFT ON THE NOSE OF A VERY MOIST (+20C DEWPOINT AT H8) LLJ JET AXIS. MEANWHILE...WV IMAGERY INDICATES A SEPARATE WAVE OVER THE RIO GRANDE VALLEY...BEGINNING TO LIFT NORTH INTO THE MORE MERIDIONAL FLOW THROUGH THE SRN/CNTRL PLAINS. CANNOT SAY ANY OPERATIONAL OR ALTERNATIVE HI RES MODEL IS PERFORMING PARTICULARLY WELL WITH ANYTHING THAT HAS EVOLVED OVER THE PAST 12 HOURS. HAVE SUMMARILY DISMISSED RECENT NAM SOLUTIONS...WHICH HAVE SHOWN SEVERAL EGREGIOUS ERRORS WITHIN THE FIRST 3-6 HOURS. WHILE GFS SOLUTIONS HAVE PICKED UP ON SOME SALIENT FEATURES...SIGNIFICANT TIMING AND POSITION ERRORS LEAD TO LOWER CONFIDENCE. WILL CONTINUE TO HEDGE TOWARDS HIGH RESOLUTION 4KM ARW AND NMM CORES...THOUGH QUESTIONABLE INITIALIZATION DATA MUST BE CONSIDERED AS A LIMITING CONFIDENCE MEASURE. EXPECTING THE COMBINATION OF THE DUAL NEBRASKA CONVECTIVE SYSTEMS TO FORCE AN OUTFLOW BOUNDARY/SHALLOW GRAVITY WAVES SOUTHEAST INTO NERN KANSAS/NRN MISSOURI THROUGH THE MORNING HOURS. SIMILAR TO YESTERDAY MORNING...ENHANCED LIFT OVER THIS BOUNDARY ORIENTED NEARLY PERPENDICULAR TO THE LLJ AXIS COULD INVIGORATE SCT SMALL TSTMS NEAR/AHEAD OF THE SURGING LINE SEGMENT PROPAGATING ALONG THE KANSAS/NEBRASKA BORDER. HIGH RES MODELS INDICATE THIS MORE ENHANCED BOUNDARY STALLING THROUGH THE FORECAST AREA TODAY...AND WHILE THERE MAY BE A PERIOD OF SUBSIDENCE DURING THE LATE MORNING/EARLY AFTERNOON HOURS...ANTICIPATE MUCH OF THE AREA WILL BECOME CHARACTERIZED BY HIGH INSTABILITY AND REDUCED INHIBITION BY THE MID AFTERNOON. MODEL OBJECTIVE ANALYSIS INDICATES SLIGHTLY COOLER CAPPING INVERSION CURRENTLY OVER THE AREA...AND COMBINED WITH THE AFOREMENTIONED APPROACHING SUBTROPICAL TEXAS WAVE (EXTENSIVE ACCAS FIELD OVER OKLAHOMA AND ARKANSAS ALREADY INDICATIVE OF COOLER MOIST POCKET ALOFT)...SHOULD SEE BETTER CHANCES FOR DEEP ROBUST FOCUSED ALONG THE BOUNDARY REMNANTS. DEEP LAYER SHEAR STILL REMAINS SOMEWHAT MARGINAL FOR WIDESPREAD ORGANIZED SVR WX...HOWEVER GIVEN THE HIGHER INSTABILITY MEASURES...A FEW PULSE OR MULTICELL SVR STORMS WILL BE POSSIBLE. OTHERWISE...NEXT SERIES OF SHORTWAVES EJECTING FROM THE PARENT DESERT SW TROUGH WILL INTERACT WITH VERY MOIST UPSLOPE FLOW ACROSS THE CNTRL/SRN HIGH PLAINS LATE THIS AFTERNOON AND EVENING. WITH THE EFFECTIVE LOW LEVEL BOUNDARY SINKING FURTHER SOUTH THAN IN PREVIOUS DAYS...CONVECTION SHOULD INITIATE CLOSER TO FAR SE COLORADO/SW KANSAS...EVENTUALLY CONSOLIDATING INTO ANOTHER MCS SOMEWHERE OVER CNTRL KANSAS. THIS ENTIRE PROCESS SHOULD REPEAT ONCE AGAIN SUNDAY EVENING INTO MONDAY MORNING. WITH LOWER CONFIDENCE ON EXACT PLACEMENT AND TIMING OF SAID SYSTEM(S)...HAVE ONLY ADVERTISED HIGHER END CHANCE/LOWER END LIKELY POPS THROUGH THIS TIME PERIOD (FAVORING THE EARLY MORNING HOURS FOR MOST EXTENSIVE COVERAGE). FEELING IS CURRENT 00Z GFS QPF PLACEMENT IS SOMEWHAT TOO FAR NORTH VERSUS CONCEPTUALLY WHAT MAY BE EXPECTED. WILL HOLD OFF ON ANY WATCH STATEMENTS FOR THE TIME BEING...BUT CERTAINLY THE OVERALL PATTERN COINCIDENT WITH A LARGE RESERVOIR OF PWATS AOA 1.75 INCHES SCREAMS LARGE FLOODING POTENTIAL. WILL CONTINUE TO HIGHLIGHT THIS THREAT IN THE LOCAL HAZARDOUS WEATHER OUTLOOK. PRECIPITATION MAY LINGER THROUGH THE SOUTHERN ZONES THROUGH MONDAY AFTERNOON...THOUGH IN REALITY THE EFFECTIVE BAROCLINIC ZONE MAY HAVE BENN PUSHED FURTHER SOUTH BY THIS TIME THROUGH MESOSCALE PROCESSES. STILL BELIEVE OPERATIONAL GFS SOLUTION IS TOO DEEP WITH ENERGY ACROSS THE UPPER MIDWEST NEXT WEEK...THOUGH EFFECT ON THE OVERALL FORECAST APPEARS QUITE MINIMAL...AND A PERIOD OF DRIER WEATHER AND FAR LESS HUMID NEAR NORMAL TEMPERATURES CAN BE EXPECTED. 21 && .AVIATION... SCATTERED ELEVATED STORMS HAVE DEVELOPED OVER WEST CENTRAL MISSOURI IN WARM ADVECTION ZONE. IN ADDITION THUNDERSTORM COMPLEXES OVER NEBRASKA AND NORTHERN KANSAS WILL MOVE EAST AND WEAKEN THROUGH THE MORNING. HOWEVER DO EXPECT ACTIVITY TO MOVE ACROSS KSTJ/KMCI AND POSSIBLY KMKC THIS MORNING AS WEAKENING LLJ LIFTS OVER THE LINGERING OUTFLOW BOUNDARY. THIS OUTFLOW BOUNDARY MAY ALSO BE THE FOCUS FOR SCATTERED TSRA THIS AFTERNOON. FOR THIS AFTERNOON WILL INCLUDE CB MENTION ALONE. NEXT OVERNIGHT THUNDERSTORM COMPLEX IS EXPECTED TO DEVELOP OVER WESTERN KANSAS AND MOVE EAST TOWARD THE TERMINALS. WITH THIS ONE EXPECTED TO BE FARTHER SOUTH...WILL INTRODUCE TEMPO TSRA IN ALL AREA TAFS AT THE END OF THE FORECAST PERIOD. WILL NOT GO PREVAILING WITH SOME UNCERTAINTY IN TIMING/TRACK. && .EAX WATCHES/WARNINGS/ADVISORIES... MO...NONE. KS...NONE.
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO 557 AM CDT SAT JUN 12 2010 KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040- 043>046-053-054-131100- ATCHISON KS-MIAMI-LINN KS-DONIPHAN-LEAVENWORTH-WYANDOTTE-JOHNSON KS- ATCHISON MO-NODAWAY-WORTH-GENTRY-HARRISON-MERCER-PUTNAM-SCHUYLER- HOLT-ANDREW-DE KALB-DAVIESS-GRUNDY-SULLIVAN-ADAIR-BUCHANAN-CLINTON- CALDWELL-LIVINGSTON-LINN MO-MACON-PLATTE-CLAY-RAY-CARROLL-CHARITON- RANDOLPH-JACKSON-LAFAYETTE-SALINE-HOWARD-CASS-JOHNSON MO-PETTIS- COOPER-BATES-HENRY- 557 AM CDT SAT JUN 12 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST...NORTH CENTRAL AND WEST CENTRAL MISSOURI...AS WELL AS EXTREME EASTERN KANSAS. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS WILL MOVE INTO NORTHEAST KANSAS AND NORTHERN MISSOURI THIS MORNING ON THE SOUTHERN FLANK OF A LARGER COMPLEX OF STORMS TO THE NORTH AND WEST. SEVERE WEATHER IS NOT ANTICIPATED...THOUGH GUSTY WINDS MAY BE EXPECTED WITH THE PASSAGE OF THESE STORMS...BEFORE THE ENTIRE COMPLEX DECAYS LATER IN THE MORNING. TEMPERATURES ARE EXPECTED TO QUICKLY RISE THROUGH THE AFTERNOON...WITH VERY HUMID CONDITIONS REMAINING ACROSS THE REGION. HEAT INDEX VALUES MAY APPROACH OR BRIEFLY TOUCH 100 DEGREES OVER MUCH OF THE OUTLOOK AREA. ADDITIONAL STORMS MAY FORM LATER THIS AFTERNOON ALONG AND NEAR THE BOUNDARY LEFT FROM THE MORNING ACTIVITY. ANY OF THESE STORMS COULD LOCALLY PRODUCE HAIL AND WINDS NEAR SEVERE LEVELS...THOUGH THE THREAT FOR WIDESPREAD ORGANIZED SEVERE WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THROUGH EARLY NEXT WEEK...A SLOW MOVING FRONTAL BOUNDARY WILL SETTLE SOUTH THROUGH MISSOURI...SERVING AS THE FOCUS FOR SEVERAL ROUNDS OF THUNDERSTORMS. LARGE HAIL AND DAMAGING WINDS MAY BE POSSIBLE WITH ANY STRONGER STORMS. HOWEVER...THE PRIMARY CONCERN WILL BE FOR VERY HEAVY RAINFALL AND THE THREAT OF FLASH FLOODING AND RENEWED OR AGGRAVATED RIVER FLOODING. CONDITIONS APPEAR FAVORABLE FOR SEVERAL INCHES OF RAINFALL ACROSS THE REGION...ESPECIALLY DURING THE SUNDAY INTO MONDAY TIME PERIOD...WITH EXCESSIVE AMOUNTS POSSIBLE WHERE REPEATED THUNDERSTORM DEVELOPMENT OCCURS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED AT TIMES ACROSS PARTS OF THE OUTLOOK AREA THROUGH THE WEEKEND. 21
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
736 AM CDT SAT JUN 12 2010
KSZ025-102-MOZ020-121315-
ATCHISON KS-BUCHANAN MO-DONIPHAN KS-
736 AM CDT SAT JUN 12 2010
...SIGNIFICANT WEATHER ADVISORY FOR WESTERN BUCHANAN...ATCHISON AND
SOUTHEASTERN DONIPHAN COUNTIES UNTIL 815 AM CDT...
AT 733 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 6 MILES SOUTHWEST OF
WATHENA TO EFFINGHAM...AND MOVING NORTHEAST AT 25 MPH.
HAIL UP TO ONE-HALF INCH IN DIAMETER IS EXPECTED WITH THESE STORMS...
ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING.
LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...
ELWOOD...WATHENA...EFFINGHAM...LANCASTER...FAUCETT...HURON AND ST.
JOSEPH AIRPORT.
TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED
ROADWAY.
LAT...LON 3958 9554 3969 9519 3982 9489 3982 9487
3960 9478 3953 9497 3953 9509 3950 9506
3942 9526 3941 9557
TIME...MOT...LOC 1236Z 237DEG 23KT 3970 9498 3949 9543
CDBSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
750 AM CDT SAT JUN 12 2010
MOZ012-013-020-121330-
ANDREW MO-BUCHANAN MO-DE KALB MO-
750 AM CDT SAT JUN 12 2010
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN BUCHANAN...DEKALB
AND SOUTHEASTERN ANDREW COUNTIES UNTIL 830 AM CDT...
AT 747 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 5 MILES EAST OF ST. JOSEPH...MOVING NORTHEAST AT
30 MPH.
HAIL UP TO ONE-HALF INCH IN DIAMETER IS EXPECTED WITH THIS STORM...
ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING.
LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
MAYSVILLE...CLARKSDALE...EASTON...COSBY...HELENA AND AMITY.
TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED
ROADWAY.
LAT...LON 3984 9428 3974 9456 3974 9461 3972 9462
3965 9480 3982 9488 4004 9441
TIME...MOT...LOC 1250Z 236DEG 28KT 3979 9472
CDBThe Pleasant Hill radar (KEAX), 40 km away, was scanning. The volume nearest the first event began at 15:44 UTC.
3 flash flood, 1 thunderstorm wind. Local standard time, as filed.
Thunderstorm winds gusted up to 60 mph, near the intersection of Highway's 210 and 291.
Heavy rains across the region, caused flooding in the McCoy Park area, with reports of cars becoming submerged. There were reports of up to eight inches of water on Noland Road.
One to two feet of water was reported near Highway's Y and 58.
Numerous intersections were reported flooded in Raytown.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Missouri in 2010Every state in 2010This day in weather historyWarnings in Missouri, June 2010
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: 245006, 245003, 245004, 245005.