Severe Thunderstorm Warning 169, NWS Kansas City, MO

AREA FORECAST DISCUSSION
National Weather Service Kansas City/Pleasant Hill MO
716 AM CDT Mon Aug 31 2020

.Discussion...
Issued at 402 AM CDT MON AUG 31 2020

Patchy areas of elevated showers and thunderstorms have been
observed throughout the night in SE NE; however, the evolution has
not been as widespread as expected making predicting the coverage
of showers and thunderstorms difficult. IR satellite shows an
outflow boundary from thunderstorms in SE NE entering N KS. A
small LLJ nosing into E KS just ahead of the boundary and looks to
be the catalyst for convection. This boundary and any
accompanying convection makes its way into our area within the
next couple of hours.

The cold front is expected to stall out over the KC metro around
midday. The convective system traveling ahead of the front makes its
way into southern MO fueled by diurnally heated unstable air and
strong upper level divergence in that area. Resultant cold pools and
outflow from the exiting MCS may interact with the stationary
boundary triggering more precipitation during the late afternoon and
evening Monday.

Meanwhile, in the OK panhandle, a leeward mountain wave sets off
another area of precipitation which follows upper level steering
currents into our area during the day Tuesday.  Most of Tuesday
morning looks to be rainy with precipitation exiting the area during
the afternoon and evening hours. Wednesday looks to be drier;
however, some models are hinting at slight chances of rain for areas
south of the MO river during the early morning as another wave
passes by to the south of our CWA. The active weather pattern
continues for areas south of I-70 through the remainder of the week;
however, it is a welcome change to the stale baking 90 degree heat
of a couple weeks ago.

&&

.Aviation...(For the 12Z TAFS through 12Z Tuesday Morning)
Issued at 715 AM CDT MON AUG 31 2020

Showers and thunderstorms remain in the area through the morning
into the early afternoon. Hazards include lightning, gusty winds,
heavy rain, and reduced visibilities. Storms are expected to move
out of the region near midday. Residual cloud cover from
thunderstorms remain keeping ceilings near MVFR levels. Wind
speeds will increase and shift out of the north behind the front.
Another round of showers and storms is expected to come through
overnight Monday into Tuesday morning.

&&

.EAX WATCHES/WARNINGS/ADVISORIES...
KS...NONE.
MO...NONE.
&&

Discussion...Pesel
Aviation...Pesel

Hazardous Weather Outlook
National Weather Service Kansas City/Pleasant Hill MO
515 AM CDT Mon Aug 31 2020

KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040-
043>046-053-054-011015-
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-
515 AM CDT Mon Aug 31 2020

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 are expected across eastern Kansas and western
Missouri through the morning. Some storms could be strong to severe
with 40 to 60 mph winds and 1 inch hail all possible, along with
heavy rain. Minor flooding will be possible.

 More detailed information can be accessed at...
 https://www.weather.gov/eax/hwo

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

 Another round of thunderstorms is expected to form early Tuesday
morning. Severe weather is not expected at this time, but heavy rain
could bring some minor flooding concerns.

 More detailed information can be accessed at...
 https://www.weather.gov/eax/hwo

Special Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
619 AM CDT Mon Aug 31 2020

KSZ102-MOZ011>013-020-021-311215-
Doniphan KS-Buchanan MO-Clinton MO-De Kalb MO-Holt MO-Andrew MO-
619 AM CDT Mon Aug 31 2020

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL DONIPHAN...NORTHEASTERN
BUCHANAN...NORTHWESTERN CLINTON...SOUTHEASTERN HOLT...ANDREW AND
SOUTHWESTERN DEKALB COUNTIES UNTIL 715 AM CDT...

At 619 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Mound City to near Wathena. Movement was
east at 35 mph.

Nickel size hail and wind gusts up to 50 mph will be possible with
these storms.

Locations impacted include...
St. Joseph, Savannah, Wathena, Elwood, Troy, Country Club Villa,
Country Club, Oregon, Stewartsville, Union Star, Amazonia,
Clarksdale, Forest City, Fillmore, White Cloud, Easton, Big Lake,
Rosendale, Cosby and Rea.

This includes the following highways...
 Interstate 29 between mile markers 42 and 78.
 Interstate 229 between mile markers 0 and 14.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 4010 9470 3987 9448 3967 9448 3969 9509
      3999 9534 4000 9534 4000 9531 4001 9531
      4003 9535 4003 9538 4005 9540
TIME...MOT...LOC 1119Z 271DEG 28KT 4006 9528 3970 9494

Leighton

Special Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
639 AM CDT Mon Aug 31 2020

KSZ102>105-MOZ012-013-020-021-028-029-037-311230-
Johnson KS-Doniphan KS-Wyandotte KS-Leavenworth KS-Platte MO-
Buchanan MO-Clinton MO-De Kalb MO-Jackson MO-Andrew MO-Clay MO-
639 AM CDT Mon Aug 31 2020

...SIGNIFICANT WEATHER ADVISORY FOR WYANDOTTE...SOUTHEASTERN
DONIPHAN...NORTHEASTERN LEAVENWORTH...NORTHEASTERN JOHNSON...
BUCHANAN...CLAY...WESTERN CLINTON...PLATTE...SOUTHEASTERN ANDREW...
SOUTHWESTERN DEKALB AND WESTERN JACKSON COUNTIES UNTIL 730 AM CDT...

At 639 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from St. Joseph to Mission. Movement was east at 20
mph.

Nickel size hail and winds in excess of 40 mph will be possible with
these storms.

Locations impacted include...
Kansas City, Overland Park, Independence, Lee's Summit, St. Joseph,
Shawnee, Blue Springs, Lenexa, Leavenworth, Leawood, Raytown,
Liberty, Gladstone, Prairie Village, Lansing, Excelsior Springs,
Merriam, Mission, Smithville and Kearney.

This includes the following highways...
 Interstate 70 in Missouri between mile markers 0 and 20.
 Interstate 70 in Kansas between mile markers 411 and 423.
 Interstate 35 in Missouri between mile markers 0 and 35.
 Interstate 35 in Kansas between mile markers 223 and 235.
 Interstate 29 between mile markers 0 and 53.
 Interstate 635 between mile markers 0 and 12.
 Interstate 470 between mile markers 0 and 16.
 Interstate 435 between mile markers 2 and 76.
 Interstate 229 between mile markers 0 and 11.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3990 9455 3943 9426 3889 9427 3895 9480
      3982 9500
TIME...MOT...LOC 1139Z 266DEG 19KT 3977 9482 3904 9466

Leighton

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
757 AM CDT MON AUG 31 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0656 AM     HAIL             KANSAS CITY KANSAS      39.12N 94.63W
08/31/2020  E1.00 INCH       WYANDOTTE          KS   PUBLIC

&&

SGA

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