An isolated early morning pulse type thunderstorm on June 11, 2011, produced a wind gust to 58 mph, at the Kansas City International Airport.
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The episode as NWS EAX wrote it up.
An isolated early morning pulse type thunderstorm on June 11, 2011, produced a wind gust to 58 mph, at the Kansas City International Airport.
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 11, 3:11 AM CST, 4 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO 411 AM CDT Mon Jun 11 2012 .DISCUSSION... Short Term (Tonight-Wednesday) Overnight, the focus was on two lines of convection: the leading line being the advancing gust front and the second line being focused along the cold front. The showers and thunderstorms along the gust front continued to weaken through the overnight hours, with the bit of remnant activity tracking southeast of the Missouri River by 09Z. The better area of convective activity was focused along the cold front that was stretching roughly along a line from North Kansas City to Cameron and Bethany around 09Z. The activity was remaining well below severe limits with 1000-1500 J/kg MUCAPE, weak shear, and poor lapse rates present. This line of thunderstorms had been fairly slow-moving, but has become a bit more progressive toward the southeast with the help of 20-25kt 850mb winds. This slow tracking was resulting in higher rainfall rates across extreme northeast Kansas and northwest Missouri, with some locations likely accumulating more than one inch of rain within an hour. HRRR shows the line of thunderstorms stretching along a Kansas City to Chillicothe line by around 10Z, progressing just south of the Missouri River by around 13Z. Short range models are in fairly good agreement that this thunderstorm activity will shift southeast of the forecast area late this morning, but cannot rule out a few lingering showers and thunderstorms across central Missouri early this afternoon. Winds will shift to the northwest behind the advancing cold front. However, cold air advection behind the cold front will be limited today so should see afternoon temperatures still warmer than normal -- into the middle 80s. High pressure will build in across the Northern and Central Plains later this afternoon and track toward the Great Lakes region by the middle of the week, keeping conditions dry. Temperatures look to be near to slightly above seasonal normals through Wednesday as winds shift from northeast to southeast with the eastward-moving surface high. As the upper level trough over the Northern Plains progresses toward the northern Great Lakes, a more zonal flow will set up across the western and central CONUS through mid-week. Models have shown the potential for a few disturbances to develop within the zonal flow primarily west of the forecast area across Kansas. Confidence is low in whether or not any of these impulses will spread enough eastward to clip eastern Kansas and extreme western Missouri Wednesday and Wednesday night, so have nothing more than slight chance pops in for that area. ACH Medium Range (Thursday through Sunday)... Prefer a wait and see approach as it relates to rain chances during the medium range period. The 00z ECMWF and GFS build mid level heights, with the ECMWF developing a closed high, across the mid MO River Valley while a western U.S. trough builds. While it's certainly possible a weak vorticity lobe or two will meander across the Central Plains Thursday or Friday within a chaotic and weak westerly flow coming out of the Rockies, confidence is low on just how much convection, if any can make it into the CWA. Agree with the previous discussion in favoring the drier ECMWF over the relatively wet GFS. As such can only justify slight chance pops until the end late Sunday when falling heights across the Plains in response to the approaching upper trough offers some hope that increasing dynamics will generate some scattered convection. A gradual warm up on temperatures and dewpoints continues to look in order with readings in the upper 80s/90 by the weekend. MJ && .AVIATION... Convection percolating along and behind front will continue for the next few hours over the terminals as the front lays out more east west. Shear is weak and gust front getting out ahead will keep storms below severe levels but as new elevated storms develop the terminals will be in and out of MVFR until around daybreak. Adolphson && .EAX WATCHES/WARNINGS/ADVISORIES... MO...NONE. KS...NONE. && WFO EAX
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO 656 PM CDT SUN JUN 10 2012 KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040- 043>046-053-054-111115- 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- 656 PM CDT SUN JUN 10 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST...NORTH CENTRAL AND WEST CENTRAL MISSOURI...AS WELL AS EXTREME EASTERN KANSAS. .DAY ONE...TONIGHT THUNDERSTORMS WILL CONTINUE TO DEVELOP ACROSS SOUTHEAST NEBRASKA AND WESTERN IOWA...SPREADING INTO PARTS OF NORTHERN AND WESTERN MISSOURI AND EASTERN KANSAS LATE THIS EVENING AND EARLY MONDAY MORNING. A FEW OF THESE STORMS MAY BECOME SEVERE...WITH LARGE HAIL...DAMAGING WINDS AND LOCALLY HEAVY RAINFALL. THE HIGHEST THREAT FOR SEVERE THUNDERSTORMS WILL BE MAINLY BEFORE MIDNIGHT...AND ACROSS AREAS GENERALLY ALONG AND NORTHWEST OF INTERSTATE 35. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THUNDERSTORM ACTIVITY MAY CONTINUE INTO MONDAY MORNING AND EARLY AFTERNOON ACROSS EAST CENTRAL KANSAS INTO CENTRAL MISSOURI. THE THREAT FOR SEVERE THUNDERSTORMS IS LOW...ALTHOUGH A FEW OF THESE STORMS MAY PRODUCE GUSTY WINDS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THROUGH EARLY TONIGHT BUT IS NOT ANTICIPATED LATE TONIGHT OR MONDAY. CDB
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1218 AM CDT MON JUN 11 2012
KSZ103-MOZ012-013-020-021-028-029-110600-
ANDREW MO-BUCHANAN MO-CLAY MO-CLINTON MO-DE KALB MO-LEAVENWORTH
KS-PLATTE MO-
1218 AM CDT MON JUN 11 2012
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN ANDREW...PLATTE...
SOUTHWESTERN DEKALB...CLINTON...NORTHWESTERN CLAY...BUCHANAN AND
NORTHEASTERN LEAVENWORTH COUNTIES UNTIL 100 AM CDT...
AT 1216 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A GUST FRONT PRECEDING STRONG THUNDERSTORMS ALONG A LINE EXTENDING
FROM CLARKSDALE TO GOWER TO EDGERTON TO LEAVENWORTH...AND MOVING
SOUTHEAST AT 35 MPH. WHILE THE GUST FRONT IS MOVING SOUTHEAST THE
THUNDERSTORMS ARE TRACKING NORTHEAST WITH A SECONDARY AREA OF STRONG
WINDS.
WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THE GUST FRONT AND WINDS
TO 50 MPH WITH THE THUNDERSTORMS...ALONG WITH HEAVY RAIN AND
FREQUENT DANGEROUS LIGHTNING.
LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...
PLATTSBURG...SMITHVILLE...WEATHERBY LAKE...LATHROP...KEARNEY...
RIVERSIDE...GLADSTONE...CAMERON...STEWARTSVILLE...TRIMBLE...
FERRELVIEW...OSBORN...PLATTE WOODS...LAKE WAUKOMIS...HOLT...HOUSTON
LAKE...OAKVIEW...NORTHMOOR...FARLEY AND HOOVER.
THIS WILL IMPACT THE FOLLOWING INTERSTATES...
I-35 IN MISSOURI BETWEEN MILE MARKERS 7 AND 48.
I-435 LOOP FROM MILE MARKERS 24 TO 51.
I-29 BETWEEN MILE MARKERS 0 AND 45.
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 3976 9424 3948 9424 3937 9431 3915 9457
3934 9497 3960 9497 3980 9472 3989 9467
TIME...MOT...LOC 0517Z 299DEG 31KT 3982 9454 3965 9452
3949 9461 3931 9485
MJThe Pleasant Hill radar (KEAX), 67 km away, was scanning. The volume nearest the first event began at 09:14 UTC.
1 thunderstorm wind. Local standard time, as filed.
The ASOS at the Kansas City International Airport, measured a thunderstorm wind gust at 58 mph.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Missouri in 2012Every state in 2012This day in weather historyWarnings in Missouri, June 2012
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: 381806.