Alert archive / Kansas / River Flood Warnings in 2026

River Flood Warning 14, NWS Topeka, KS

April 27, 2026Lyon County, Osage County, Kansas

NWS Topeka, KS issued this river flood warning at Apr 27, 2026, 7:11 AM CDT for Lyon County, Osage County, Kansas. It took effect at Apr 27, 2026, 10:19 AM CDT. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued: Apr 27, 2026, 7:11 AM CDT (12:11 UTC)
In effect from: Apr 27, 2026, 10:19 AM CDT
Expired: Apr 28, 2026, 1:03 AM CDT
In force: 15 hr
Issued by: NWS Topeka, KS
Area: Storm-based polygon
Flood severity: Moderate

Counties Lyon County, KS, Osage County, KS

The river

Written for the forecast point Marais Des Cygnes River near Reading (RDNK1). The gauge peaked at 22.06 ft at Apr 27, 2026, 5:00 PM CDT.

Action stage: 14 ft
Minor stage: 19 ft
Moderate stage: 21 ft
Major stage: 45 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 06910800, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

What forecasters said that day

The local office's own words before this river flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Topeka, KS wrote its last area forecast discussion before this river flood warning went out at Apr 27, 5:30 AM CDT, 1 hour 41 minutes earlier.

Area forecast discussion, Apr 27, 5:30 AM CDT, 1 hour 41 minutes before

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Hazardous weather outlook, Apr 26, 5:12 PM CDT, 13 hours 59 minutes before

Hazardous Weather Outlook
National Weather Service Topeka KS
512 PM CDT Sun Apr 26 2026

KSZ010>012-023-024-026-039-040-272215-
Marshall-Nemaha-Brown-Pottawatomie-Jackson-Jefferson-Shawnee-Douglas-
512 PM CDT Sun Apr 26 2026

...FLOOD WATCH IN EFFECT FROM 7 PM CDT THIS EVENING THROUGH MONDAY
AFTERNOON...

This Hazardous Weather Outlook is for east central Kansas and
northeast Kansas.

.DAY ONE...Tonight.

Flood watch through 12 PM Monday. Thunderstorms will redevelop and
some will be severe with the primary hazard being large hail,
isolated damaging wind gusts, and heavy rainfall.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Flood watch through 12 PM Monday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

&&

.SPOTTER MESSAGE

Weather spotters are encouraged to relay reports of hail, damaging
wind, tornadoes and flooding.

&&

More detailed information can be found at:
www.weather.gov/media/top/DssPacket.pdf

KSZ008-009-020>022-034>038-054>056-058-059-272215-
Republic-Washington-Cloud-Clay-Riley-Ottawa-Dickinson-Geary-Morris-
Wabaunsee-Lyon-Osage-Franklin-Coffey-Anderson-
512 PM CDT Sun Apr 26 2026

This Hazardous Weather Outlook is for central Kansas, east central
Kansas, north central Kansas and northeast Kansas.

.DAY ONE...Tonight.

Thunderstorms will redevelop late Tonight. Some of the storms will
be severe with the primary hazard being large hail and isolated
damaging wind gusts.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

The probability for widespread hazardous weather is low.

.SPOTTER MESSAGE

Weather spotters are encouraged to relay reports of hail, damaging
wind, tornadoes and flooding.

&&

More detailed information can be found at:
www.weather.gov/media/top/DssPacket.pdf

In the hours before

Local storm report, Apr 27, 5:54 AM CDT, 1 hour 17 minutes before

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Local storm report, Apr 27, 5:58 AM CDT, 1 hour 13 minutes before

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Local storm report, Apr 27, 6:10 AM CDT, 1 hour 1 minute before

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Local storm report, Apr 27, 6:15 AM CDT, 56 minutes before

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Local storm report, Apr 27, 6:20 AM CDT, 51 minutes before

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Local storm report, Apr 27, 6:45 AM CDT, 26 minutes before

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The office that day

Everything else NWS Topeka, KS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 26, 7:45 PM CDT	Special Weather Statement	TOP	Anderson	30 min
Apr 26, 11:43 PM CDT	Severe Thunderstorm Warning Considerable damage threat	TOP	Dickinson, Morris	32 min
Apr 26, 11:47 PM CDT	Severe Thunderstorm Warning	TOP	Clay, Pottawatomie, Riley	28 min
Apr 26, 11:53 PM CDT	Severe Thunderstorm Warning	TOP	Geary, Morris, Wabaunsee	37 min
Apr 27, 12:14 AM CDT	Severe Thunderstorm Warning	TOP	Dickinson, Geary, Lyon, Morris	31 min
Apr 27, 12:27 AM CDT	Severe Thunderstorm Warning	TOP	Geary, Pottawatomie, Riley, Shawnee, Wabaunsee	33 min
Apr 27, 12:37 AM CDT	Severe Thunderstorm Warning Considerable damage threat	TOP	Dickinson	23 min
Apr 27, 12:46 AM CDT	Severe Thunderstorm Warning	TOP	Dickinson, Geary, Morris	29 min
Apr 27, 12:49 AM CDT	Severe Thunderstorm Warning	TOP	Clay, Dickinson, Ottawa	26 min
Apr 27, 12:54 AM CDT	Severe Thunderstorm Warning	TOP	Dickinson, Geary, Morris	36 min
Apr 27, 12:55 AM CDT	Severe Thunderstorm Warning	TOP	Jackson, Pottawatomie, Shawnee	22 min
Apr 27, 1:10 AM CDT	Severe Thunderstorm Warning Considerable damage threat	TOP	Geary, Lyon, Morris, Wabaunsee	35 min
Apr 27, 1:14 AM CDT	Severe Thunderstorm Warning	TOP	Clay, Dickinson, Ottawa	31 min
Apr 27, 1:24 AM CDT	Severe Thunderstorm Warning	TOP	Dickinson, Geary, Morris, Riley, Wabaunsee	36 min
Apr 27, 1:35 AM CDT	Severe Thunderstorm Warning Considerable damage threat	TOP	Geary, Lyon, Morris, Wabaunsee	25 min
Apr 27, 1:54 AM CDT	Severe Thunderstorm Warning Considerable damage threat	TOP	Pottawatomie, Wabaunsee	36 min
Apr 27, 1:58 AM CDT	Severe Thunderstorm Warning	TOP	Geary, Morris, Pottawatomie, Riley, Wabaunsee	15 min
Apr 27, 1:58 AM CDT	Severe Thunderstorm Warning	TOP	Cloud, Ottawa	47 min
Apr 27, 2:09 AM CDT	Severe Thunderstorm Warning Considerable damage threat	TOP	Douglas, Jackson, Jefferson, Osage, Pottawatomie, Shawnee and 1 more	51 min
Apr 27, 2:14 AM CDT	Severe Thunderstorm Warning	TOP	Geary, Pottawatomie, Riley	31 min
Apr 27, 2:20 AM CDT	Flash Flood Warning	TOP	Dickinson, Geary, Morris, Pottawatomie, Riley, Wabaunsee	4 hr
Apr 27, 2:26 AM CDT	Severe Thunderstorm Warning Considerable damage threat	TOP	Wabaunsee	34 min
Apr 27, 2:39 AM CDT	Severe Thunderstorm Warning	TOP	Geary, Riley, Wabaunsee	36 min
Apr 27, 2:42 AM CDT	Severe Thunderstorm Warning Considerable damage threat	TOP	Jefferson	18 min
Apr 27, 2:52 AM CDT	Severe Thunderstorm Warning Considerable damage threat	TOP	Douglas, Jackson, Jefferson, Osage, Shawnee, Wabaunsee	38 min
Apr 27, 3:02 AM CDT	Severe Thunderstorm Warning	TOP	Dickinson	28 min
Apr 27, 3:25 AM CDT	Severe Thunderstorm Warning Considerable damage threat	TOP	Douglas, Jefferson, Shawnee	35 min
Apr 27, 3:29 AM CDT	Severe Thunderstorm Warning	TOP	Morris, Wabaunsee	31 min
Apr 27, 3:49 AM CDT	Severe Thunderstorm Warning	TOP	Geary, Riley, Wabaunsee	26 min
Apr 27, 3:49 AM CDT	Severe Thunderstorm Warning	TOP	Lyon, Morris, Osage, Wabaunsee	26 min
Apr 27, 4:00 AM CDT	Severe Thunderstorm Warning	TOP	Douglas, Jefferson	30 min
Apr 27, 4:05 AM CDT	Severe Thunderstorm Warning	TOP	Lyon, Osage, Shawnee, Wabaunsee	40 min
Apr 27, 4:11 AM CDT	Flash Flood Warning	TOP	Wabaunsee	2 hr
Apr 27, 4:29 AM CDT	Flash Flood Warning	TOP	Douglas, Jackson, Jefferson, Shawnee	2 hr
Apr 27, 4:33 AM CDT	Severe Thunderstorm Warning	TOP	Douglas, Jefferson	42 min
Apr 27, 4:53 AM CDT	River Flood Warning	TOP	Shawnee	4 hr
Apr 27, 5:02 AM CDT	River Flood Warning	TOP	Wabaunsee	22 hr
Apr 27, 5:12 AM CDT	Severe Thunderstorm Warning	TOP	Douglas	18 min
Apr 27, 6:38 AM CDT	Areal Flood Warning	TOP	Wabaunsee	11 hr
Apr 27, 6:38 AM CDT	Areal Flood Warning	TOP	Dickinson, Geary, Morris, Pottawatomie, Riley, Wabaunsee	11 hr
Apr 27, 6:38 AM CDT	Areal Flood Warning	TOP	Douglas, Jackson, Jefferson, Shawnee	5 hr
Apr 27, 7:35 AM CDT	River Flood Warning	TOP	Osage	9 hr
Apr 27, 8:17 AM CDT	River Flood Warning	TOP	Shawnee	11 hr

Nearby

River Flood Warnings in Kansas, 2026 Every river flood warning in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the gauge from the NWS water service and the USGS.