A decaying cluster of thunderstorms brought severe weather to east central Kansas and west central Missouri during the morning hours of September 10th. Additional thunderstorms developed during the afternoon and evening hours within an extremely unstable air mass.
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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 EAX wrote it up.
A decaying cluster of thunderstorms brought severe weather to east central Kansas and west central Missouri during the morning hours of September 10th. Additional thunderstorms developed during the afternoon and evening hours within an extremely unstable air mass. As an upper level wave moved southeast from the Northern Plains, thunderstorms erupted over eastern Kansas and quickly transitioned into a convective complex that tracked through the southern portions of the Pleasant Hill forecast area.
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 Sep 10, 3:22 AM CST, 38 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO 422 AM CDT THU SEP 10 2015 .DISCUSSION... Issued at 421 AM CDT THU SEP 10 2015 Today - Tonight... In the very short term the remnants of a long-lived mini-complex of thunderstorms looks like it will have enough legs to push into the far western CWA before dissipating after sunrise. Feature is being powered by a shortwave trough tracking east through the base of a broad upper level trough covering the north central states down into the Mid MO Valley. Moist isentropic ascent on the 305K and 310K surfaces feeding/lifting marginal instability into this complex will maintain activity for several more hours. Remainder of the day will be spent waiting for the development of strong/severe convection over KS/MO. A moderately strong cold front will drop southward from SD/MN and encounter a moderately unstable airmass residing over KS and MO where operational models show MLCAPES in excess of 2000J/kg this afternoon. Favorable 0-6km shear of 40kts will provide a favorable environment for rotating supercells which will support the production of large hail for the first few hours before the convection evolves into short line segments and mini-bows which will then favor damaging winds. Agree with the area depicted by the latest SPC Day 1 outlook which places a slight risk of severe storms over west central MO and adjacent east central KS. One caveat is if any residual boundaries will linger from this mornings storms which would certainly muddy up the waters. With very good agreement between models on timing and location have sufficient confidence to increase PoPs over the western CWA for late afternoon into the evening hours. And with precipitable water values increasing to near 2 inches and favorable timing of convection heavy rains are likely. With steering flow in excess of 30kts believe storm motion will be fast enough that cells won't reside long enough to warrant a flash flood watch. Model trend is a bit faster so have ended rains a bit faster tonight. Friday - Tuesday... A dry and very pleasant period with much below average temperatures starting off and then then a gradual warm-up back to normal. The upper trough is expected to sharpen early in the period allowing a surge of very cool and dry air to overspread the region and resulting in fall-like temperatures. Will see morning lows dip into the 40s Saturday and Sunday with afternoon highs in the upper 60s- lower 70s through Sunday. Warm air advection commences for the start of next week as the upper trough pushes eastward allowing heights to rise and warmer air parked over the Southern Rockies advects northeastward. Wednesday... The ECMWF and GFS are similar in lowering heights east of the Rockies in advance of a sharp shortwave trough ejecting northeast through the Rockies. Rain chances likely to increase but questions revolve around the placement of the cold front. && .AVIATION...(For the 06Z TAFS through 06Z Thursday Night) Issued at 1159 PM CDT WED SEP 9 2015 VFR conds will prevail thru tomorrow afternoon with mid-lvl clouds expected through late morning. By late morning sct cu around 4kft will be thr rule. Winds will be light and vrb overnight before picking up out of the SW around 5kts during the morning hours. A cold front will approach the terminals this evening with thunderstorms developing around the terminals around 21Z-23Z. Storms will contain heavy rain which will reduce vsbys to 3-5SM. Storms will cont thru the remainder of the TAF period at all but STJ when -tsra should come to an end around 03Z. Winds will shift to the north btn 5-10kts behind the front. && .EAX WATCHES/WARNINGS/ADVISORIES... KS...NONE. MO...NONE. && DISCUSSION...MJ AVIATION...73
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO 413 PM CDT WED SEP 9 2015 KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040- 043>046-053-054-102115- 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- 413 PM CDT WED SEP 9 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST...NORTH CENTRAL AND WEST CENTRAL MISSOURI...AS WELL AS EXTREME EASTERN KANSAS. .DAY ONE...TONIGHT STRONG TO SEVERE THUNDERSTORMS WILL BE POSSIBLE ACROSS NORTHWEST MISSOURI AND NORTHEAST KANSAS THURSDAY AFTERNOON AND EVENING. LARGE HAIL WILL BE THE BIGGEST THREAT...HOWEVER ISOLATED STRONG WIND GUSTS CANNOT BE RULED OUT. IN ADDITION...HEAVY RAIN MAY LEAD TO LOCALIZED FLASH FLOODING AS STORMS CONTINUE THROUGH THE OVERNIGHT HOURS. MORE DETAILED INFORMATION CAN BE ACCESSED AT... HTTP://WWW.WEATHER.GOV/EAX/HWO .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. MORE DETAILED INFORMATION CAN BE ACCESSED AT... HTTP://WWW.WEATHER.GOV/EAX/HWO
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
429 AM CDT THU SEP 10 2015
KSZ103-105-101015-
JOHNSON KS-LEAVENWORTH KS-
429 AM CDT THU SEP 10 2015
...SIGNIFICANT WEATHER ADVISORY FOR LEAVENWORTH AND NORTHWESTERN
JOHNSON COUNTIES UNTIL 515 AM CDT...
AT 428 AM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
OSKALOOSA...MOVING EAST AT 40 MPH.
HALF INCH HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.
LOCATIONS IMPACTED INCLUDE...
OLATHE...GARDNER...LANSING...BONNER SPRINGS...DE SOTO...TONGANOXIE...
BASEHOR...LINWOOD...RENO...FAIRMOUNT...CLEARVIEW CITY AND JARBALO.
THIS INCLUDES KANSAS TURNPIKE BETWEEN MILE MARKERS 206 AND 222.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.
THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.
TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
OFFICE IN PLEASANT HILL.
&&
LAT...LON 3931 9517 3922 9486 3920 9487 3920 9490
3882 9492 3886 9506 3898 9506 3899 9507
3898 9509 3896 9508 3898 9516 3896 9517
3897 9519
TIME...MOT...LOC 0928Z 291DEG 34KT 3916 9533
LGThe Pleasant Hill radar (KEAX), 68 km away, was scanning. The volume nearest the first event began at 09:58 UTC.
10 thunderstorm wind, 5 hail, 1 flash flood. Local standard time, as filed.
A 20 diameter tree limb as well as one large tree downed near 166th Street and Evans Road south of Basehor.
Numerous tree limbs up to 6 in diameter were blown down.
A 52 kt wind gust was recorded at the New Century Airport in Olathe, KS.
A 2' diameter tree was blown down.
Penny sized hail and winds to 55 mpher were estimated near 175th St and Renner Rd outside of Olathe, KS.
A 16 diameter tree was snapped in half.
Reported via MPing.
A 2' diameter tree was knocked down blocking a road near 66th and Monticello.
Wind gust of 60 mph was observed at a personal weather station.
A 60 mph wind gust was reported by law enforcement.
Winds were estimated to be 60 mph.
An 8 to 10 inch diameter tree was blown down.
A water rescue was performed on Lakeshore Dr. and Cedar Creek just south of 135th St.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Kansas in 2015Every state in 2015This day in weather historyWarnings in Kansas, September 2015
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: 597790, 597791, 597792, 597793, 597794, 597795, 597796, 597797, 597798, 597799, 597800, 597802, 597803, 597804, 597805, 597819.