Regional Weather Summary
Issued by NWS Omaha/Valley, NE

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AWUS83 KOAX 180810

Weather Summary for Eastern Nebraska and Southwest Iowa
National Weather Service Omaha/Valley NE
310 AM CDT Thu May 18 2017

Much cooler temperatures filtered into eastern Nebraska and southwest
Iowa behind a low pressure system that brought showers and
thunderstorms to the area on Wednesday. Under mainly cloudy skies and
west to northwest winds of 15 to 25 mph, temperatures at 3 AM had
fallen into the lower and middle 50s, however southwest Iowa was
still a bit warmer with readings in the upper 50s.

Another strong low pressure system is forecast to develop in the
Plains this afternoon, emerging from the Rockies into the southwest
Kansas and Oklahoma Panhandle area. Very warm and unstable air
surging north ahead of the low will combine to ignite severe
thunderstorms from central Kansas into Oklahoma by mid afternoon,
with large hail and tornadoes likely in those areas. These storms are
expected to spread east and northeast in the late afternoon and
evening, reaching central and eastern Nebraska, eastern Kansas and
western Missouri during the evening, then on into Iowa and South
Dakota after midnight. Though the threat of severe weather will
diminish as the storms move northeast, a few strong storms could
occur in southern Nebraska and western Missouri before midnight.

Other showers and thunderstorms are forecast for much of today and
tonight in western sections of South Dakota and Nebraska, with even a
chance for snow to mix with the rain in parts of the Nebraska
Panhandle into Wyoming.

Skies should be mostly sunny outside of rain areas until storms
develop this afternoon, with mostly cloudy skies forecast tonight.
Expect afternoon highs to range from the 40s in far western Nebraska
to the 80s and 90s in southern Kansas and Missouri. Lows tonight
should drop into the 30s in western Nebraska, with 40s expected
across most of the rest of Nebraska into Iowa. Lows in the 50s and
60s are forecast in Missouri and eastern Kansas.

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