Weather Alerts For Herrick, IL

# HEADLINE -------------------- HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT MONDAY # DETAILS -------------------- WHAT Heat index values of 105 to 110 degrees. WHERE Portions of central, east central, and southeast Illinois. WHEN Until 9 PM CDT Monday. IMPACTS Hot temperatures and high humidity may cause heat illnesses. ISSUED AT Sunday, July 26, 2026 at 1:43 PM CDT ISSUED BY National Weather Service Lincoln IL HEADER URGENT - WEATHER MESSAGE # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. # AREAS AFFECTED -------------------- Effingham, Clay, De Witt, Macon, Marshall, McLean, Moultrie, Piatt, Richland, Shelby, Woodford Including the cities of Normal, Lacon, Eureka, Sullivan, Decatur, Shelbyville, Olney, Flora, Effingham, Monticello, Clinton, and Bloomington

Closest strike: 0.29 miles Stay Alert! Remain in a safe area until there has been no lightning within 10 miles of this location for 30 minutes. Please be aware that lightning activity can remain high even when a storm is moving away from your location. Even if rain has stopped, do not leave your safe area until WeatherBug indicates that lightning is more than 10 miles away from this selected location. IF OUTDOORS Avoid water, high ground, and open spaces. Avoid all metal objects including electric wires, fences, and machinery. Find a safe area in a building or in a fully enclosed vehicle with the windows completely shut. Unsafe places include underneath canopies, small picnic or rain shelters, convertibles, or near trees. IF INDOORS Avoid water and stay away from doors and windows. Avoid using a hard line telephone. Take off headphones. Turn off, unplug, and stay away from appliances, computers, power tools, and TV sets. Lightning may strike exterior electric and phone lines, inducing shocks to inside equipment.

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 OVER PORTIONS OF THE UPPER MIDWEST AND WESTERN GREAT LAKES SUMMARY Severe thunderstorms capable of large to very large hail, damaging winds (possibly 75+ mph), and tornado risk remain likely from the upper Mississippi Valley and Great Lakes southwestward into Nebraska, mainly late this afternoon and tonight. 20Z Update Upper Midwest No changes were made to the prior outlook. Severe storm development remains likely this afternoon and evening as a very warm air mass continues to destabilize. Weak, but sufficient, synoptic ascent (evident in visible imagery) should aid in removing inhibition by late this afternoon. Initial supercells developing over northeastern MN and far northern WI will pose an all-hazards risk, including locally severe wind gusts, very large hail, and a couple of tornadoes. An MCS should eventually develop and track south/southeast across WI and MI with a risk for damaging gusts and a brief tornado or two through tonight. NE More isolated higher-based convection remains possible from central and eastern NE, into western IA, and southeast SD late this afternoon and evening. Very hot surface temperatures and moderate buoyancy will support a few stronger storms with damaging wind and isolated hail potential. Convective development appears most probable along a thermally induced surface pressure trough, from central NE northeastward late this afternoon. Mid MS Valley A very unstable and weakly capped air mass is present along a diffuse differential heating zone from northwest IL, into northern TN. Current expectations are for one or more clusters of thunderstorms to develop along the boundary and ahead of a weak mid-level wave/MCV across IA/IL, before spreading south/southeastward into this evening. The extreme instability (4000+ J/kg MLCAPE) and 25-35 kt of deep-layer shear should support organized clusters, and eventually an MCS, with damaging winds likely. A tornado or two is also possible with initial convection along the boundary owing to extreme buoyancy, or any embedded QLCS circulations with the expected MCS. See MCD#1742 for short-term information. Elsewhere, isolated damaging gusts remain possible with scattered thunderstorms over the northern Rockies and across the Mid Atlantic/Southeast. Weaker buoyancy/shear overlap suggests these occurrences will be more sporadic, with limited storm organization/longevity. See the prior discussion for additional information.