Alert archive / Missouri / River Flood Warnings in 2026

River Flood Warning 30, NWS Kansas City, MO

April 18, 2026Johnson County, Pettis County, Missouri

NWS Kansas City, MO issued this river flood warning at Apr 18, 2026, 4:36 AM CDT for Johnson County, Pettis County, Missouri. It took effect at Apr 18, 2026, 5:00 AM CDT. It was in force for 13 hr.

The area

The counties it named.

The facts

Issued
Apr 18, 2026, 4:36 AM CDT (09:36 UTC)
In effect from
Apr 18, 2026, 5:00 AM CDT
Expired
Apr 18, 2026, 6:22 PM CDT
In force
13 hr
Issued by
NWS Kansas City, MO
Area
Storm-based polygon
Flood severity
Minor

Counties Johnson County, MO, Pettis County, MO

The radar

The Pleasant Hill radar (KEAX), 63 km from the middle of the area, began a volume at 09:38 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The river

Written for the forecast point Blackwater River near Valley City (VLYM7). The gauge peaked at 23.96 ft at Apr 18, 2026, 8:00 AM CDT.

actionminormoderate102004/1804/19
Action stage
17 ft
Minor stage
22 ft
Moderate stage
25 ft
Major stage
31 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 06907700, 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 Kansas City, MO wrote its last area forecast discussion before this river flood warning went out at Apr 18, 4:18 AM CDT, 18 minutes earlier.

Area forecast discussion, Apr 18, 4:18 AM CDT, 18 minutes before
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Hazardous weather outlook, Apr 17, 5:07 AM CDT, 23 hours 29 minutes before
Hazardous Weather Outlook
National Weather Service Kansas City/Pleasant Hill MO
0507 AM CDT Fri Apr 17 2026

KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040-
043>046-053-054-181007-
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-
0507 AM CDT Fri Apr 17 2026

This hazardous weather outlook is for northwest...north central and
west central Missouri...as well as extreme eastern Kansas.

.DAY ONE...Through tonight.

Please go to https://weather.gov/media/eax/DssPacket.pdf for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Please go to https://weather.gov/media/eax/DssPacket.pdf for more information on
potential weather hazards.

.KEY MESSAGES...

- Strong to severe thunderstorms are expected across the region
  this afternoon. All severe hazards will be possible, but large
  hail should be the primary threat soon after storm initiation
  while damaging winds become more probable as storms organize
  into clusters or lines. Isolated tornadoes cannot be ruled
  out, especially if storms can remain discrete.

- Flash flooding and river flooding is possible this evening, as
  storms will be capable of producing torrential rainfall.
  Additionally, training storms may develop in southern portions
  of the forecast area, where local rainfall amounts of 2 to 4
  inches may occur. A flood watch is in effect late this
  afternoon through tonight roughly along and south of I-70.

- Much cooler temperatures are expected on Saturday.
  Temperatures may fall into the low to mid 30s on Saturday
  night, with areas of frost possible (up to a 50 percent chance
  north and east of the Missouri River).

In the hours before

Local storm report, Apr 17, 10:40 PM CDT, 5 hours 56 minutes before
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Local storm report, Apr 17, 10:49 PM CDT, 5 hours 47 minutes before
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Local storm report, Apr 17, 10:51 PM CDT, 5 hours 45 minutes before
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Local storm report, Apr 18, 1:11 AM CDT, 3 hours 25 minutes before
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The office that day

Everything else NWS Kansas City, MO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 17, 7:05 PM CDTTornado WarningEAXHenry25 min
Apr 17, 8:00 PM CDTSevere Thunderstorm WarningEAXCooper27 min
Apr 17, 8:09 PM CDTAreal Flood AdvisoryEAXBates, Cooper, Henry, Johnson, Pettis6 hr
Apr 17, 9:20 PM CDTAreal Flood WarningEAXCooper11 hr
Apr 18, 2:01 AM CDTRiver Flood WarningEAXCooper33 hr

Nearby

River Flood Warnings in Missouri, 2026Every 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; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.