Every watch, warning and advisory the National Weather Service has in force over LaSalle County, Illinois. Open it for the live map, where it pans and zooms.
Map layer from NOAA National Weather Service. Boundaries from the Iowa Environmental Mesonet.
Alerts in force2
Every product in force for LaSalle County, worst first, with its full text.
Flood Warning
Severe
Flood Warning issued September 20 at 9:28AM CDT until September 23 at 1:00AM CDT by NWS Chicago IL
Begins Until 2 days left
Areas La Salle, IL
Full text
...The Flood Warning is extended for the following rivers in
Illinois...
Fox River at Dayton affecting La Salle County.
* WHAT...Moderate flooding is forecast.
* WHERE...Fox River from Millington downstream to confluence with the
Illinois River, including the Dayton gauge.
* WHEN...From this afternoon to late Tuesday night.
* IMPACTS...At 14.5 feet, Low-lying agricultural land inundated near
Norway.
* ADDITIONAL DETAILS...
- At 8:45 AM CDT Sunday the stage was 9.6 feet.
- Forecast...The river is expected to rise above flood stage this
afternoon to a crest of 14.9 feet Monday morning. It will then
fall below flood stage Tuesday afternoon.
- Flood stage is 12.0 feet.
- http://www.weather.gov/safety/flood
What to do
A Flood Warning means water levels above flood stage are imminent or
may already be occurring. Persons along rivers and streams in the
warned area should take immediate precautions to protect life and
property.
These forecasts are based on observed precipitation as well as
forecast precipitation 24 hours into the future. Changes to the
rainfall forecast, or any additional rainfall after 24 hours, may
cause changes to these river forecasts.
Additional information is available at www.weather.gov.
The next statement will be issued by late tonight.
Flood Watch issued September 20 at 10:20AM CDT until September 23 at 10:00AM CDT by NWS Chicago IL
Begins Until 3 days left
Areas Bureau, IL; Putnam, IL; La Salle, IL
Full text
...The National Weather Service in Chicago has issued a Flood Watch
for the following rivers in Illinois...
Illinois River at La Salle affecting Putnam, La Salle and Bureau
counties.
For the Illinois River (Upper)...including Morris, Ottawa, La
Salle...flooding is possible.
* WHAT...Flooding is possible.
* WHERE...Illinois River from Starved Rock Lock and Dam downstream to
confluence with Big Bureau Creek, including the La Salle gauge.
* WHEN...From Monday morning to Wednesday morning.
* ADDITIONAL DETAILS...
- At 9:45 AM CDT Sunday the stage was 13.4 feet.
- Forecast...Flood stage may be reached Monday afternoon.
- Flood stage is 20.0 feet.
- http://www.weather.gov/safety/flood
What to do
A Flood Watch means water levels above flood stage are possible, but
not yet certain, based upon the latest forecasts. Persons along
rivers and streams in the watch area should monitor the latest
forecasts and be prepared to take action should flooding develop.
These forecasts are based on observed precipitation as well as
forecast precipitation 24 hours into the future. Changes to the
rainfall forecast, or any additional rainfall after 24 hours, may
cause changes to these river forecasts.
Additional information is available at www.weather.gov.
The next statement will be issued by late tonight.
In the past year the National Weather Service issued 183 alerts for LaSalle County, including 34 severe thunderstorm warnings, 18 flood warnings, 10 tornado warnings and 8 flash flood warnings.
From the Iowa Environmental Mesonet’s archive of NWS watches, warnings and advisories (VTEC), by the county’s own code and the forecast zones inside it. Each date links to the event at the IEM.
Nearby
The counties around LaSalle County, with what is in force in each.
The hazard is happening or about to. Act now: a tornado warning means take shelter, a flash flood warning means move to higher ground.
Watch
Conditions favor the hazard. Nothing is happening yet; have a plan and be ready to act if a warning follows.
Advisory
A hazard that is less serious than a warning but can still cause trouble, such as dense fog, heat or light ice.
Statement
Information about weather that does not yet meet a warning: a strong storm, a hydrologic update, or a special weather statement.
Severity (extreme, severe, moderate, minor) is the rating the issuing office gives each product. More on the difference: tornado watch vs. tornado warning. Alerts come from the National Weather Service; follow its instructions and your local officials.
Sources
Alerts from the National Weather Service's public feed, read afresh every minute, and matched to counties and zones by their UGC codes. Warnings from outside the United States come from each country's own meteorological service. Follow the issuing office's instructions and your local officials.
