After heavy rain moved through the Kansas City Metro several local roadways were inundated with running water.
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.
After heavy rain moved through the Kansas City Metro several local roadways were inundated with running water.
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 Apr 28, 2:19 PM CST, 26 minutes earlier.
AREA FORECAST DISCUSSION National Weather Service Kansas City/Pleasant Hill MO 319 PM CDT Wed Apr 28 2021 .Discussion... Issued at 319 PM CDT WED APR 28 2021 Key Points: -Showers and thunderstorms are expected tonight, especially along and south of I-70. A marginally strong storm is possible, along with locally heavy rainfall. -Drier and warming conditions are expected to develop Thursday continuing into the first half of the weekend. Detailed discussion... Slow moving boundary bisecting the forecast area as of 20Z extending from the metro into northeast Missouri. Along and south of the boundary, near surface based CAPE values ~1000 J/kg with 30-35 knots of 06-km bulk shear. This may allow for a few storms to become strong to near severe south of I-70 late this afternoon into the evening with small hail an gusty winds being the main threats. Probably the biggest concern will be locally heavy rainfall, with precipitable water values of 1.5-1.75" along and south of the boundary (near maximum values for this time of year). Expect convective threat to sag south through the evening hours tonight, with rain chances decreasing after midnight. Could see some isolated instability showers develop through the afternoon hours on Thursday, mainly across the eastern half of Missouri. Thereafter, expect warming trend into the weekend ahead of upper low lifting from Mexico towards the central plains. This could lead to another round of showers and thunderstorms Sunday night into Monday. && .Aviation...(For the 18Z TAFS through 18Z Thursday Afternoon) Issued at 1253 PM CDT WED APR 28 2021 Slow moving boundary will become the focus for showers and storms. This will result in period of showers and thunderstorms through the mid and late afternoon hours across the metro. Behind the boundary, MVFR conditions are expected through the evening. Expect self destructive sunshine on Thursday, with the possibility of an instability shower or two, mainly east of the TAF sites. && .EAX WATCHES/WARNINGS/ADVISORIES... KS...NONE. MO...NONE. && Discussion...BT Aviation...BT
Special Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
230 PM CDT Wed Apr 28 2021
KSZ103-104-MOZ028-282015-
Wyandotte KS-Leavenworth KS-Platte MO-
230 PM CDT Wed Apr 28 2021
...SIGNIFICANT WEATHER ADVISORY FOR WYANDOTTE...LEAVENWORTH AND
SOUTHEASTERN PLATTE COUNTIES UNTIL 315 PM CDT...
At 230 PM CDT, Doppler radar was tracking a strong thunderstorm over
Tonganoxie, moving northeast at 35 mph.
Pea size hail and winds in excess of 30 mph will be possible with
this storm.
Locations impacted include...
Shawnee, Leavenworth, Lansing, Bonner Springs, Parkville, Tonganoxie,
Platte City, Basehor, Edwardsville, Riverside, Weatherby Lake, Kansas
City, Lake Waukomis, Ferrelview, Platte Woods, Linwood, Northmoor,
Houston Lake, Reno and Fairmount.
This includes the following highways...
Interstate 70 in Kansas between mile markers 410 and 415.
Interstate 29 between mile markers 3 and 17.
Interstate 635 between mile markers 7 and 12.
Interstate 435 between mile markers 11 and 39.
Kansas Turnpike between mile markers 206 and 226.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3924 9518 3939 9461 3916 9460 3906 9485
3906 9487 3904 9488 3900 9500 3900 9502
3898 9505 3899 9508 3896 9509 3898 9516
3896 9517 3897 9519
TIME...MOT...LOC 1930Z 227DEG 29KT 3909 9507
PietrychaThe Pleasant Hill radar (KEAX), 66 km away, was scanning. The volume nearest the first event began at 20:42 UTC.
5 flash flood. Local standard time, as filed.
After 1-2 inches of rain fell over a short period of time there was flooding along Jones-Myer Road and Hillsboro Road near Waldron.
After 1 to 2 inches of rain fell across the area in a short period of time there were several reports of flooding in the Peculiar area.
After 1 to 2 inches of rain fell over a short period of time, several stretches of Highway 291 were flooding.
After 1 to 2 inches of rain fell over a short period of time there was some flooding in Freeman, Missouri in the Van Buren Road area.
After 1 to 2 inches of rain fell over a short period of time a few roads near West Line flooded.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Missouri in 2021Every state in 2021This day in weather historyWarnings in Missouri, April 2021
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: 952207, 952208, 952209, 952210, 952211.