Area Forecast Discussion
Issued by NWS Omaha/Valley, NE

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FXUS63 KOAX 210326

Area Forecast Discussion
National Weather Service Omaha/Valley NE
1026 PM CDT Sat May 20 2017

.SHORT TERM...(Tonight through Tuesday)
Issued at 236 PM CDT Sat May 20 2017

Upper low moving into the forecast area will continue to generate
a few showers late this afternoon into early this evening
along/north of I80, but they do end a couple of hours past
midnight in our extreme northeastern counties. Otherwise, clouds
will be decreasing overnight, resulting in cool lows in the upper
30s to lower 40s.

Cool temps aloft could generate a few instability showers Sunday,
but they should remain north of the forecast area. Breezy northwest
winds on Sunday, but a little warmer back into the 60s, with
warmest readings in the upper 60s in our southwest forecast areas.

A very weak subtle wave might bring very light showers to the
KS/NE border late Sunday night, but increasing chances for precip
will be in the forecast Monday, especially in the afternoon as a
weak cool front begins to move in. Highs Monday ahead of the front
should reach the upper 60s to mid 70s. Pops Monday range 40-60
percent, with highest percentage along the front along/south of
I80 Monday evening.

With cool trough aloft remaining in the area on Tuesday, a few
instability showers may develop with highs back down to 60 to 65.

.LONG TERM...(Tuesday night through Saturday)
Issued at 236 PM CDT Sat May 20 2017

Wednesday and Thursday should be dry with warming temperatures
back into the 60s and then 70s respectively as ridging develops
aloft. Rain chances back into the forecast Friday into Saturday as
a couple of weak upper level impulses move through the region.


.AVIATION...(For the 06Z TAFS through 06Z Sunday night)
Issued at 1023 PM CDT Sat May 20 2017

MVFR conditions are expected through the overnight hours with a
few spotty showers. Conditions are forecast to improve to VFR
late Sunday morning.


Issued at 236 PM CDT Sat May 20 2017

Rainfall amounts last night were much higher than forecast, with
24 hour amounts ranging 2-3.5" inches in some areas. This in turn
resulted in some flooding across the area, with numerous river
flood warnings issued throughout the day. These warnings/advisories
impact the Missouri River, the Big Blue River, Little Blue River,
Wahoo Creek, Salt Creek, Turkey Creek, Swan Creek, Rose Creek,
and the West Nishnabotna River. Of note, the Missouri River at
both Brownville and Rulo was upgraded to moderate flooding over
the next few days.




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