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Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
420 PM CDT Thu May 23 2019

Winnebago-Boone-McHenry-Lake-Ogle-Lee-De Kalb-Kane-DuPage-Cook-
La Salle-Kendall-Grundy-Will-Kankakee-Livingston-Iroquois-Ford-
420 PM CDT Thu May 23 2019 /520 PM EDT Thu May 23 2019/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Tonight.

Weather hazards expected...

  Limited Thunderstorm Risk.


Showers and thunderstorms will be possible very late tonight and
into Friday morning. Severe weather is not expected with this
activity, although the strongest storms could produce small hail.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

  Elevated Severe Thunderstorm Risk.
  Elevated Flooding Risk.
  Limited Severe Thunderstorm Risk.
  Elevated Flooding Risk.
Sunday through Tuesday...
  Limited Thunderstorm Risk.
  Limited Thunderstorm Risk.
  Limited Non Thunderstorm Wind Risk.


Showers and some thunderstorms may linger across the region on
Friday morning. Severe weather is not expected with this morning
activity, although some small hail is possible.

An additional round of thunderstorms is possible Friday evening
and overnight. Some of these storms could be strong to severe. All
modes of severe weather will be possible including large hail,
damaging winds, and a tornado or two. In addition to the severe
weather threat, heavy rainfall, combined with saturated soils,
will pose a threat for flash flooding.

Additional rounds of thunderstorms are possible this weekend with
a continued threat for flooding.


  Spotter activation will not be necessary through tonight.


  Moving toward the east around 40 mph late tonight.


Hydrologic Outlook

Hydrologic Outlook

Hydrologic Outlook
National Weather Service Chicago IL
126 PM CDT Thu May 23 2019

...Rainfall over the next several days may lead to additional
river rises and possible flooding...

Many rivers across the area remain elevated due to rainfall over
the last several weeks. Additional rainfall is possible tomorrow
into next week which may further increase river levels. Areas at
highest risk of significant river rises include the Rock and Fox
River Basins.

This flood potential exists through early next week.

Rainfall of 1.5 to 5.0 inches occurred across northeast Illinois
over the last week. This rainfall has kept many river locations
elevated, with a few locations near flood stage. Soil moisture
also remains high across the area.

Although confidence is low at this time regarding exact placement
and amounts of future rainfall, some areas may receive 1.0 to 2.0
inches of rainfall by Monday with isolated high amounts. There is
also the potential for some of this rainfall to occur in heavy
thunderstorms which may cause flash flooding impacts.

This outlook means that elevated river conditions and potential
impacts are possible, but not yet certain. Those with interests
along area rivers should closely monitor future river forecasts
including the possibility of flood watches, warnings, and



Flood Warning

Flood Statement
National Weather Service Chicago/Romeoville IL
1135 AM CDT Thu May 23 2019

...The Flood Warning is cancelled for the following rivers in

  Illinois River at Ottawa affecting La Salle County

...The Flood Warning continues for the following rivers in

  Illinois River at La Salle affecting Bureau...La Salle and Putnam

The following forecasts are based on observed precipitation as well
as forecast precipitation 24-48 hours into the future.


Safety message...If you encounter a flooded roadway...turn around and
find an alternate route.


1135 AM CDT Thu May 23 2019

The Flood Warning continues for
  The Illinois River at La Salle, or from Starved Rock Lock and Dam
  downstream to confluence with Big Bureau Creek.
* until further notice.
* At 1045 AM Thursday the stage was 25.0 feet.
* Flood stage is 20.0 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Forecast...The river will continue rising slightly to near 25.1 feet
  by this afternoon then begin falling.


LAT...LON 4131 8940 4135 8933 4137 8898 4128 8899
      4128 8929


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Silver Spring, MD 20910
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