Weather Alerts For Carpentersville, IL

# HEADLINE -------------------- The Flood Warning continues for the following rivers in Illinois FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE # SUMMARY -------------------- Fox River at Montgomery affecting Kendall and Kane Counties. Fox River at Algonquin Lock & Dam tailwater affecting McHenry, Kane and Lake IL Counties. # DETAILS -------------------- WHAT Major flooding is occurring and is forecasted to continue. WHERE Fox River from Johnsburg downstream to Red Gate Road in St. Charles, including the Algonquin Lock & Dam tailwater gauge. WHEN Until further notice. IMPACTS At 12.0 feet, structures threatened along River Street, Johnson Street, and Maiden Lane in East Dundee. North Harrison Street threatened near Riverside Park in Algonquin. Washington Street threatened in Carpentersville. Water Street, Edwards Avenue, and Elgin Avenue threatened in East Dundee. Bayview Road threatened in Elgin. Low-lying areas of Festival Park are threatened in Elgin. ADDITIONAL DETAILS - At 8:30 PM CDT Thursday, the stage was 12.0 feet. - FORECAST - The river is expected to remain nearly steady around its crest of 12.0 feet through Friday. It will then begin a very slow fall but will remain above flood stage through at least next week. - Flood stage is 9.5 feet. - http://www.weather.gov/safety/flood ISSUED AT Thursday, April 23, 2026 at 9:15 PM 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 Friday afternoon.

There is a Marginal 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 ACROSS ARTS OF EASTERN KANSAS AND NORTHERN OKLAHOMA SUMMARY Scattered severe thunderstorms will continue this evening from parts of the southern and central Plains north-northeastward into the lower Missouri and upper Mississippi Valleys. Tornadoes, large hail and severe wind gusts are expected. Southern and Central Plains Latest water vapor imagery shows an upper-level trough over the Great Plains, with an associated mid-level jet streak moving through the base of the trough into the southern Plains. At the surface, a cold front is advancing southeastward across far southeast Nebraska, east-central Kansas and far northern Oklahoma. Ahead of the front, multiple line segments are ongoing. These broken lines are embedded with discrete to semi-discrete supercells. The storms are located along an axis of moderate to strong instability, with the RAP showing MLCAPE in the 2500 to 3500 J/kg range. Over the top of this moist and unstable airmass, flow is westerly around 50 knots. This is creating moderate to strong deep-layer shear which will continue to support supercells this evening. Steep mid-level lapse rates approaching 8 C/km will be favorable for large hail. In addition, the western edge of a 40 to 50 knot low-level jet will remain in place over eastern Kansas. WSR-88D VWPs that are sampling the low-level jet have 0-3 km storm-relative helicity in the 400 to 450 m2/s2 range, which will support a continued tornado threat. In addition, a threat for wind damage will also continue through the mid to late evening...see MCD 510. Lower Missouri Valley/Upper Mississippi Valley Southwesterly mid-level flow is in place over much of the north-central U.S. At the surface, a cold front is located from central Minnesota south-southwestward into the mid Missouri Valley. A line of strong to severe thunderstorms is ongoing ahead of the front from far southeastern Minnesota into central Iowa and far northwestern Missouri. Moderate instability is analyzed ahead of the line, with the RAP showing MLCAPE in the 1500 to 2000 J/kg range. The thermodynamic environment will continue to be favorable for isolated large hail. In addition, a 40 to 50 knot jet is analyzed over east-central Iowa. As the low-level jet strengthens, tornadoes will be possible with rotating cells embedded in the line. As the line continues to move eastward through the mid to late evening, wind damage will be possible with embedded supercells and bowing line segments.

Pollen Index: 10.7 Pollen Level: high Predominant Pollen: Elm, Poplar/Aspen/Cottonwood and Maple. The quantity of pollen grains in the air for Friday will be falling in the moderate range. This lower level is caused by rising humidity, weakening winds and expected precipitation in the morning, afternoon and evening which tends to wash pollen out of the air. Relief is in sight.