Hazardous Weather Outlook
Issued by NWS Quad Cities, IA IL

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FLUS43 KDVN 200614

Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
114 AM CDT Thu Jul 20 2017

Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll-
Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson-
114 AM CDT Thu Jul 20 2017

This Hazardous Weather Outlook is for portions of north central
Illinois...northwest Illinois...west central Illinois...east
central Iowa...northeast Iowa...southeast Iowa and northeast


Thunderstorms are possible late tonight and toward sunrise,
especially north of highway 30. An isolated severe storm with
large hail, damaging wind and heavy rainfall is possible.


Thursday through Saturday...several rounds of thunderstorm complexes
will push across portions of the outlook area, mainly along and
north of Interstate 80. There is the potential for these storms to
be severe with damaging winds and large hail. Torrential rainfall is
likely with several inches of rain possible in a short time. This
could lead to localized flash flooding. However, confidence is low
on the timing and exact location of the thunderstorm complexes.

Hot and humid conditions can be expected through Saturday. The
hotter temperatures should generally occur near and south of
highway 30. Temperatures are expected to push well into the 90s
with dewpoints well into the 70s to around 80. This will soar heat
index values to 100 to 106 almost every afternoon through
Saturday. But cloud cover and storm outflow may bring temporary
cool downs to the ambient temperatures, especially north of
Interstate 80.

Heat advisories and excessive heat warnings are in place for
northeast Missouri, much of eastern Iowa and west central Illinois
Thursday through Saturday. Please see the latest National Weather
Service statements for details.


Spotter activation will not be needed tonight, but may be needed
Thursday over portions of eastern Iowa and northwest Illinois



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