Hazardous Weather Outlook
Issued by NWS Omaha/Valley, NE

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FLUS43 KOAX 171709
HWOOAX

Hazardous Weather Outlook
National Weather Service Omaha/Valley NE
1209 PM CDT Mon Apr 17 2017

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-180715-
Monona-Harrison-Shelby-Pottawattamie-Mills-Montgomery-Fremont-
Page-Knox-Cedar-Thurston-Antelope-Pierce-Wayne-Boone-Madison-
Stanton-Cuming-Burt-Platte-Colfax-Dodge-Washington-Butler-
Saunders-Douglas-Sarpy-Seward-Lancaster-Cass-Otoe-Saline-
Jefferson-Gage-Johnson-Nemaha-Pawnee-Richardson-
1209 PM CDT Mon Apr 17 2017

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST
IOWA...WEST CENTRAL IOWA...EAST CENTRAL NEBRASKA...NORTHEAST
NEBRASKA AND SOUTHEAST NEBRASKA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

There is a chance for thunderstorms after midnight tonight over
most of eastern Nebraska, with the chance closer to sunrise in
southwest Iowa. Severe thunderstorms are not anticipated, however
a few strong storms with small hail could occur in northeast
Nebraska. These storms will be the result of a cold front moving
into the area tonight.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

Strong to severe thunderstorms are possible over much of eastern
Nebraska and southwest Iowa Tuesday night, then again over
mainly southwest Iowa and southeast Nebraska Wednesday afternoon
and evening.

The cold front bringing the chance for thunderstorms tonight will
stall near the Kansas and Nebraska border Tuesday evening, then
lift back north Tuesday night. Unstable air forced over the front
with an increasing low level jet Tuesday night may lead to strong
to severe thunderstorms just about anywhere in the outlook area.
Large hail would be the primary severe threat with these storms,
in addition to locally heavy rainfall.

The frontal boundary is forecast to then sweep back to the
southeast Wednesday afternoon as a mid level storm system passes
by. Unstable air and strong shear is expected to develop ahead of
the front in southeast Nebraska and southwest Iowa, fueling
potentially severe thunderstorms as the front moves into that area
Wednesday afternoon and evening. All modes of severe weather will
be possible Wednesday.

More isolated thunderstorms are possible Friday and Saturday as
another storm system passes to our south.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed this afternoon, and will
probably not be needed tonight.

$$

DeWald



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