Regional Weather Summary
Issued by NWS Des Moines, IA

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AWUS83 KDMX 222228

Weather Summary for Iowa
National Weather Service Des Moines IA
528 PM CDT Fri Sep 22 2017

Today was the first day of astronomical fall, but temperatures across
Iowa this afternoon makes that hard to believe. Strong southerly winds
at 15 to 20 miles per hour have continued to bring in warm moist air
into the state. High temperatures across Iowa were in the lower to mid
90s, with dewpoints in the upper 60s to lower 70s. This pushed heat
index values into the upper 90s, with some locations pushing 100. A
heat advisory remains in effect until 7 PM central time for most of
central Iowa.

Throughout the rest of the region, skies were mainly clear, with high
temperatures in the lower to mid 90s. Low pressure centered over the
northern Plains increased cloud cover in portions of central Nebraska
and South Dakota. Associated with this low pressure is a cold front
that extends from east central South Dakota to west central Nebraska.
This system is rather slow moving.

For tonight, the hot and humid conditions will continue for Iowa, with
low temperatures only in the lower 70s. Northwest portions of the
state may see low temperature recordings in the upper 60s. Although
not as much as today, tomorrow high temperatures and dewpoints will
still be unseasonably high across Iowa. This warm and humid air mass
will remain in place until the end of the weekend and beginning of the
work week, when the cold front will move across the Midwest bringing
cooler and drier air, as well as the chance for thunderstorms Monday.

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