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2 products issued by NWS for: 4 Miles NNW Maple Park IL
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Hazardous Weather Outlook

Hazardous Weather Outlook...UPDATED
National Weather Service Chicago/Romeoville IL
823 PM CDT Wed Apr 26 2017

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
280130-
Winnebago-Boone-McHenry-Lake Illinois-Ogle-Lee-De Kalb-Kane-
DuPage-Cook-La Salle-Kendall-Grundy-Will-Kankakee-Livingston-
Iroquois-Ford-Lake Indiana-Porter-Newton-Jasper-Benton-
823 PM CDT Wed Apr 26 2017 /923 PM EDT Wed Apr 26 2017/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...Tonight.

WEATHER HAZARDS EXPECTED:
  Limited Thunderstorm Risk.
  Limited Flooding Risk.

DISCUSSION:

Rain will develop tonight and could fall at a pretty good clip at
times with a chance of a thunderstorm, especially east of
Interstate 55. Locally heavy rainfall is possible and could
result in some minor flooding in low lying and flood prone areas
overnight.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Friday and Saturday...
  Limited Thunderstorm Risk.
Sunday...
  Elevated Flooding Risk.
  Limited Thunderstorm Risk.

DISCUSSION:

Several rounds of showers and thunderstorms are expected Friday
through the weekend. Saturday night into Sunday stand the highest
potential to see heavy rainfall and there is a chance for renewed
river flooding as well as some areal flooding.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

Northeast at 50 mph.

&&

$$



Hydrologic Outlook

Hydrologic Outlook
ILC007-031-037-043-053-063-075-089-091-093-097-099-103-105-111-
141-197-201-INC007-073-089-111-127-271000-

Hydrologic Outlook
National Weather Service Chicago IL
243 PM CDT Wed Apr 26 2017 /343 PM EDT Wed Apr 26 2017/

...Potential for Heavy Rainfall Tonight...

Showers and thunderstorms are expected to spread from south to
north across the region late this afternoon through tonight. Deep
layer moisture will be on the increase through the afternoon and
into the evening hours as strong southerly to southwesterly winds
draw moisture northward. Latest indicators suggest the potential
for widespread rainfall amounts of 1.5 to 2.0 inches of rainfall
with locally higher amounts around the stronger thunderstorms.

Since area rivers and streams have not had much time to recover
from previous flooding and are still running relatively high,
renewed rises are expected and there will be the potential for
flooding on area rivers and streams. Also, given that soil
moisture levels remain high from recent rains and with reduced
capacity to handle runoff into rivers and streams that are
already high, there will be the potential for flooding, especially
in low-lying flood prone areas. Residents living in low-lying
flood prone areas and locations along rivers and streams should
pay close attention to later forecast information. Since the bulk
of the rainfall will be overnight, motorists should be especially
cautious as flooding is harder to recognize at night.

In addition, additional heavy rainfall is expected over the
weekend. Models indicate that some areas could receive several
additional inches of rain this weekend, especially Saturday night
into Sunday. This will compound any ongoing flooding across the
region.

$$

Krein




U.S. Dept. of Commerce
NOAA National Weather Service
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Silver Spring, MD 20910
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