Weather Alerts For Deer Park, IL

# HEADLINE -------------------- The Flood Warning is extended for the following rivers in Illinois FLOOD WARNING NOW IN EFFECT UNTIL SATURDAY EVENING # SUMMARY -------------------- Illinois River at La Salle affecting Putnam, Bureau and La Salle Counties. For the Illinois River (Upper)...including La Salle...Minor flooding is forecast. # DETAILS -------------------- WHAT Minor flooding is occurring and minor flooding is forecast. WHERE Illinois River from Starved Rock Lock and Dam downstream to confluence with Big Bureau Creek, including the La Salle gauge. WHEN Until Saturday evening. IMPACTS At 22.0 feet, Lower parking lot at Starved Rock State Park is inundated east of La Salle. High water levels begin to impact shipping interests along the river. ADDITIONAL DETAILS - At 7:45 AM CDT Wednesday the stage was 22.8 feet. - FORECAST - The river is expected to fall below flood stage Saturday afternoon. - Flood stage is 20.0 feet. - http://www.weather.gov/safety/flood ISSUED AT Wednesday, June 24, 2026 at 8:52 AM CDT ISSUED BY National Weather Service Chicago IL HEADER Flood Statement # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- 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.

There is a Slight Severe Storm Risk for your location. Continue reading for today's outlook from the National Weather Service's Storm Prediction Center. -------------------- National Severe Storm Outlook THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS TONIGHT ACROSS PARTS OF NORTHEASTERN COLORADO INTO NORTHWESTERN KANSAS THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS EVENING ACROSS PARTS OF THE UPPER MIDWEST AND THE GREAT BASIN SUMMARY Scattered severe storms accompanied by large hail may gradually evolve into an organizing cluster with increasing potential to produce damaging wind gusts across parts of northeastern Colorado into parts of southwestern Nebraska and western Kansas tonight. Front Range into adjacent central Great Plains Warm advection based near the 700 mb level, near the northeastern periphery of a plume of elevated mixed-layer air lingering to the east of the Front Range, is becoming the focus for increasing thunderstorm development across and east-southeast of the Cheyenne Ridge vicinity. This seems likely to continue to grow upscale during the next few hours, aided by inflow of seasonably moist boundary-layer air emanating from along and south of a stalled to slowly southwestward advancing surface front across this region through the central Nebraska/Kansas state border vicinity. Beneath 20 kt westerly deep-layer mean flow (but strongly sheared due to pronounced veering of winds from easterly to westerly with height), this activity probably will gradually organize as it propagates east-southeastward this evening, and pose increasing potential for strong to severe surface gusts. Strongest gusts and highest severe wind probabilities may eventually focus on the southwestern flank of the evolving system across parts of east central Colorado into northwest/west central Kansas, near the nose of a modest (30+ kt around 850 mb) southeasterly boundary-layer jet. Southern Wisconsin/Northern Illinois Low-level moistening is maintaining boundary-layer instability in a pre-frontal corridor across west central through northeastern Illinois early this evening. As larger-scale mid-level troughing continues to slowly dig across the Upper Midwest/Great Lakes region, forcing for ascent may maintain vigorous thunderstorm development posing a risk for severe hail and wind across parts of southeastern Wisconsin/northeastern Illinois into portions of northwestern Indiana into mid to late evening.