Flood Watch issued September 14 at 11:24AM CDT until September 15 at 1:00PM CDT by NWS Omaha/Valley NE
A conditional threat for heavy rain and flash flooding exists this
evening into Tuesday morning. A line of thunderstorms is expected to
move through the area with potential for at least 1 to 2 inch per
hour rainfall rates and training thunderstorms. Areas that received
recent heavy rainfall such as far southeast Nebraska will be more
susceptible to flooding.
WHAT: Flash flooding caused by excessive rainfall is possible.
WHERE: Portions of southwest Iowa, including the following
counties, Fremont, Mills, Montgomery, Page and Pottawattamie and
Nebraska, including the following counties, Cass, Douglas, Gage,
Johnson, Lancaster, Nemaha, Otoe, Pawnee, Richardson and Sarpy.
WHEN: From 6 PM CDT this evening through Tuesday afternoon.
IMPACTS: Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
ADDITIONAL DETAILS:
- Recent heavy rainfall combined with potential for repeated rounds
of thunderstorms this evening and overnight will lead to a flash
flooding threat through at least Tuesday morning. Additional
rounds of rainfall will be possible through the remainder of the
week. If confidence increases in potential for heavy rain Tuesday
night into Wednesday, part or all of the watch may need to be
extended.
- For flood safety information, visit weather.gov/safety/flood.
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You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.