Weather Alerts For Lancaster, IL

# HEADLINE -------------------- HEAT ADVISORY IN EFFECT FROM NOON CDT /1 PM EDT/ TO 8 PM CDT /9 PM EDT/ SUNDAY EXTREME HEAT WATCH IN EFFECT FROM MONDAY MORNING THROUGH THURSDAY EVENING # DETAILS -------------------- WHAT For the Heat Advisory, heat index values between 102 and 107 expected. For the Extreme Heat Watch, dangerously hot conditions with heat index values of 105 to 110 possible. WHERE Portions of southern Illinois, southwest Indiana, western Kentucky, and southeast Missouri. WHEN For the Heat Advisory, from noon CDT /1 PM EDT/ to 8 PM CDT /9 PM EDT/ Sunday. For the Extreme Heat Watch, from Monday morning through Thursday evening. IMPACTS Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses. ADDITIONAL DETAILS A prolonged period of dangerous heat and humidity is expected this coming week. This heatwave may linger into the 4th of July weekend. ISSUED AT Saturday, June 27, 2026 at 11:00 AM CDT ISSUED BY National Weather Service Paducah KY 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. # AREAS AFFECTED -------------------- Butler, Hardin, Livingston, Todd, Warrick, White, Alexander, Ballard, Bollinger, Caldwell, Calloway, Cape Girardeau, Carlisle, Carter, Christian, Crittenden, Daviess, Edwards, Franklin, Fulton, Gallatin, Gibson, Graves, Hamilton, Henderson, Hickman, Hopkins, Jackson, Jefferson, Johnson, Lyon, Marshall, Massac, McCracken, McLean, Mississippi, Muhlenberg, New Madrid, Perry IL, Perry MO, Pike, Pope, Posey, Pulaski, Ripley, Saline, Scott, Spencer, Stoddard, Trigg, Union, Union KY, Vanderburgh, Wabash, Wayne IL, Wayne MO, Webster, Williamson Including the cities of Carmi, Carbondale, Henderson, Albion, Poseyville, Eddyville, Marion, Benton, Marble Hill, Greenville, Princeton, Hopkinsville, Shawneetown, Wickliffe, Elkton, Evansville, Mount Vernon, Mayfield, Perryville, Fort Branch, Clinton, Calhoun, Golconda, Bloomfield, Murray, New Madrid, Jonesboro, Hickman, Owensboro, Bardwell, Mound City, Madisonville, McLeansboro, Jackson, Piedmont, Cairo, West Frankfort, Elizabethtown, Charleston, Vienna, Doniphan, Smithland, Van Buren, Fairfield, Dixon, Metropolis, Poplar Bluff, Sikeston, Murphysboro, Herrin, Rockport, Petersburg, Paducah, Cape Girardeau, Boonville, Morganfield, Cadiz, Pinckneyville, Mount Carmel, and Harrisburg

# HEADLINE -------------------- HEAT ADVISORY IN EFFECT FROM NOON CDT /1 PM EDT/ TO 8 PM CDT /9 PM EDT/ SUNDAY EXTREME HEAT WATCH IN EFFECT FROM MONDAY MORNING THROUGH THURSDAY EVENING # DETAILS -------------------- WHAT For the Heat Advisory, heat index values between 102 and 107 expected. For the Extreme Heat Watch, dangerously hot conditions with heat index values of 105 to 110 possible. WHERE Portions of southern Illinois, southwest Indiana, western Kentucky, and southeast Missouri. WHEN For the Heat Advisory, from noon CDT /1 PM EDT/ to 8 PM CDT /9 PM EDT/ Sunday. For the Extreme Heat Watch, from Monday morning through Thursday evening. IMPACTS Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses. ADDITIONAL DETAILS A prolonged period of dangerous heat and humidity is expected this coming week. This heatwave may linger into the 4th of July weekend. ISSUED AT Saturday, June 27, 2026 at 11:00 AM CDT ISSUED BY National Weather Service Paducah KY 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. # AREAS AFFECTED -------------------- Butler, Hardin, Livingston, Todd, Warrick, White, Alexander, Ballard, Bollinger, Caldwell, Calloway, Cape Girardeau, Carlisle, Carter, Christian, Crittenden, Daviess, Edwards, Franklin, Fulton, Gallatin, Gibson, Graves, Hamilton, Henderson, Hickman, Hopkins, Jackson, Jefferson, Johnson, Lyon, Marshall, Massac, McCracken, McLean, Mississippi, Muhlenberg, New Madrid, Perry IL, Perry MO, Pike, Pope, Posey, Pulaski, Ripley, Saline, Scott, Spencer, Stoddard, Trigg, Union, Union KY, Vanderburgh, Wabash, Wayne IL, Wayne MO, Webster, Williamson Including the cities of Carmi, Carbondale, Henderson, Albion, Poseyville, Eddyville, Marion, Benton, Marble Hill, Greenville, Princeton, Hopkinsville, Shawneetown, Wickliffe, Elkton, Evansville, Mount Vernon, Mayfield, Perryville, Fort Branch, Clinton, Calhoun, Golconda, Bloomfield, Murray, New Madrid, Jonesboro, Hickman, Owensboro, Bardwell, Mound City, Madisonville, McLeansboro, Jackson, Piedmont, Cairo, West Frankfort, Elizabethtown, Charleston, Vienna, Doniphan, Smithland, Van Buren, Fairfield, Dixon, Metropolis, Poplar Bluff, Sikeston, Murphysboro, Herrin, Rockport, Petersburg, Paducah, Cape Girardeau, Boonville, Morganfield, Cadiz, Pinckneyville, Mount Carmel, and Harrisburg

A Weather Alert has been issued for a nearby area. While your current location is outside of the impacted area, please stay alert and monitor weather conditions. # SUMMARY -------------------- The National Weather Service in Paducah has issued a - Flash Flood Warning for... Southern Edwards County in southeastern Illinois... Southern Wabash County in southeastern Illinois... Central Gibson County in southwestern Indiana... - Until 830 PM CDT. - At 233 PM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 2 and 7 inches of rain have fallen. Additional rainfall amounts of 1 to 3 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. # DETAILS -------------------- HAZARD Flash flooding caused by thunderstorms. SOURCE Radar. IMPACT Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE Princeton, Mount Carmel, Oakland City, Albion, Grayville, Owensville, Patoka, Francisco, Bellmont, Hazleton, Bone Gap, Keensburg and Browns. ISSUED AT Saturday, June 27, 2026 at 2:33 PM CDT ISSUED BY National Weather Service Paducah KY HEADER BULLETIN - EAS ACTIVATION REQUESTED | Flash Flood Warning # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.

# SUMMARY -------------------- THE NATIONAL WEATHER SERVICE HAS EXTENDED SEVERE THUNDERSTORM WATCH 403 TO INCLUDE THE FOLLOWING AREAS UNTIL 8 PM CDT /9 PM EDT/ THIS EVENING IN ILLINOIS THIS WATCH INCLUDES 5 COUNTIES IN SOUTHEAST ILLINOIS EDWARDS IN SOUTHERN ILLINOIS HAMILTON WABASH WAYNE WHITE IN INDIANA THIS WATCH INCLUDES 6 COUNTIES IN SOUTHWEST INDIANA POSEY IN SOUTHWEST INDIANA GIBSON PIKE SPENCER VANDERBURGH WARRICK THIS INCLUDES THE CITIES OF ALBION, BOONVILLE, CARMI, EVANSVILLE, FAIRFIELD, FORT BRANCH, GRAYVILLE, MCLEANSBORO, MOUNT CARMEL, PETERSBURG, POSEYVILLE, ROCKPORT, AND WEST SALEM. # DETAILS -------------------- ISSUED AT Saturday, June 27, 2026 at 1:59 PM CDT ISSUED BY NATIONAL WEATHER SERVICE PADUCAH KY HEADER WATCH COUNTY NOTIFICATION FOR WATCH 403

# SUMMARY -------------------- The National Weather Service in Paducah has issued a - Flash Flood Warning for... Jefferson County in south central Illinois... Wayne County in south central Illinois... Northern Edwards County in southeastern Illinois... Northern Wabash County in southeastern Illinois... - Until 730 PM CDT Saturday. - At 127 PM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. The expected rainfall rate is 1 to 2.5 inches in 1 hour. Additional rainfall amounts of 1 to 3 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. # DETAILS -------------------- HAZARD Flash flooding caused by thunderstorms. SOURCE Radar. IMPACT Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE Mount Vernon, Lancaster, Wayne City, West Salem, Woodlawn, Bluford, Cisne, Allendale, Dix, Jeffersonville, Sims, Mount Erie, Keenes and Johnsonville. ISSUED AT Saturday, June 27, 2026 at 1:27 PM CDT ISSUED BY National Weather Service Paducah KY HEADER BULLETIN - EAS ACTIVATION REQUESTED | Flash Flood Warning # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads.

# HEADLINE -------------------- FLOOD WATCH REMAINS IN EFFECT THROUGH SUNDAY MORNING # DETAILS -------------------- WHAT Flooding caused by excessive rainfall continues to be possible. WHERE Portions of southern Illinois, including the following areas, Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin, Jackson, Jefferson, Johnson, Massac, Perry IL, Pope, Pulaski, Saline, Union, Wabash, Wayne IL, White and Williamson, southwest Indiana, including the following areas, Gibson, Pike, Posey, Spencer, Vanderburgh and Warrick, western Kentucky, including the following areas, Ballard, Caldwell, Calloway, Carlisle, Christian, Crittenden, Daviess, Fulton, Graves, Henderson, Hickman, Hopkins, Livingston, Lyon, Marshall, McCracken, McLean, Muhlenberg, Todd, Trigg, Union KY and Webster, and southeast Missouri, including the following areas, Bollinger, Butler, Cape Girardeau, Carter, Mississippi, New Madrid, Perry MO, Ripley, Scott, Stoddard and Wayne MO. WHEN Through Sunday morning. IMPACTS Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Low-water crossings may be flooded. ADDITIONAL DETAILS - Additional rounds of very heavy rainfall may produce flash flooding through tonight. Many areas have already received amounts of 2-5", with localized swaths in excess of 6". Considerable to significant flash flooding is possible. - http://www.weather.gov/safety/flood ISSUED AT Saturday, June 27, 2026 at 10:44 AM CDT ISSUED BY National Weather Service Paducah KY HEADER Flood Watch # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. # AREAS AFFECTED -------------------- Butler, Hardin, Livingston, Todd, Warrick, White, Alexander, Ballard, Bollinger, Caldwell, Calloway, Cape Girardeau, Carlisle, Carter, Christian, Crittenden, Daviess, Edwards, Franklin, Fulton, Gallatin, Gibson, Graves, Hamilton, Henderson, Hickman, Hopkins, Jackson, Jefferson, Johnson, Lyon, Marshall, Massac, McCracken, McLean, Mississippi, Muhlenberg, New Madrid, Perry IL, Perry MO, Pike, Pope, Posey, Pulaski, Ripley, Saline, Scott, Spencer, Stoddard, Trigg, Union, Union KY, Vanderburgh, Wabash, Wayne IL, Wayne MO, Webster, Williamson Including the cities of Carmi, Carbondale, Henderson, Albion, Poseyville, Eddyville, Marion, Benton, Marble Hill, Greenville, Princeton, Hopkinsville, Shawneetown, Wickliffe, Elkton, Evansville, Mount Vernon, Mayfield, Perryville, Fort Branch, Clinton, Calhoun, Golconda, Bloomfield, Murray, New Madrid, Jonesboro, Hickman, Owensboro, Bardwell, Mound City, Madisonville, McLeansboro, Jackson, Piedmont, Cairo, West Frankfort, Elizabethtown, Charleston, Vienna, Doniphan, Smithland, Van Buren, Fairfield, Dixon, Metropolis, Poplar Bluff, Sikeston, Murphysboro, Herrin, Rockport, Petersburg, Paducah, Cape Girardeau, Boonville, Morganfield, Cadiz, Pinckneyville, Mount Carmel, and Harrisburg

Closest strike: 0.04 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 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 THE NORTHERN HIGH PLAINS THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE TENNESSEE VALLEY TO CAROLINAS SUMMARY Severe thunderstorms are likely today across the northern High Plains including northeast Wyoming and eastern Montana into the western Dakotas, with storms capable of very large hail, very strong outflow winds (80+ mph), and tornadoes late this afternoon into tonight. Northern High Plains this afternoon into tonight A rather active severe-weather scenario is anticipated regionally later today, including the potential for intense/locally significant severe storms. A lead shortwave trough/speed max will continue to approach through late today, with the exit region of a strong upper-level jet overspreading the region including 50+ kt southwesterlies above 5km AGL. Boundary-layer dewpoints in the 60s F will continue to spread northward regionally, to the east of a deepening surface low across northeast Wyoming toward the far western Dakotas, and a sharpening lee trough/dryline across a more prevalent north/south extent of the High Plains. This low-level moistening will occur beneath a plume of steep mid-level lapse rates emanating from the Great Basin and north-central Rockies. Initial surface-based development is expected near the surface low/trough near the Big Horn Mountains toward the Wyoming/Montana/North Dakota border vicinity. The maturing stronger initial storms will almost certainly be supercellular owing to moderate to large CAPE and a strong wind field. The risk for large to very large hail (2-3 inches in diameter) is greatest near this aforementioned border region where supercells are forecast early in the convective life cycle, although additional/somewhat more discrete development will also likely occur a bit later farther southeastward across northwest South Dakota. A few tornadoes are also possible particularly in the more moisture-rich environment near the surface triple point, but relatively large temperature-dewpoint spreads and a transition to upscale growth may temper the tornado threat, particularly with northward extent either side of the Montana/North Dakota border vicinity. As more storms develop leading to storm mergers and coalescing outflow, a linear cluster will likely develop into a maturing/accelerating bow echo into western North Dakota this evening, with significant/intense thunderstorm winds (80+ mph) possible. Severe storms will likely develop eastward tonight across the Dakotas, and prior to that, diurnally enhanced, but more isolated intense, development is plausible as far south as western Nebraska with large hail and damaging winds. Northern Intermountain West including northern UT/western WY Influenced by a lead shortwave trough/speed max associated with the prominent upper-level trough centered over the Pacific Northwest, strong to locally severe thunderstorm potential will probably exist early today. The prolifically strong wind field and modest destabilization will tend to focus today across northern Utah, southeast Idaho into western Wyoming, including the Star Valley vicinity. Severe-caliber wind gusts and some hail may occur. Mid-South/Tennessee/southern Kentucky to North Carolina Multiple MCVs, including across far south-central Missouri and southeast Kansas at midday, will influence the region as they progress east-southward generally toward Kentucky and Tennessee. Related flow enhancement is evident in regional WSR-88d VWP data, and particularly in the 12z Lamont, OK observed sounding (40+ kt 4-9km AGL). See Mesoscale Discussion 1346 for additional short-term details. These MCVs will influence and semi-focus thunderstorm development within a moist and increasingly unstable boundary layer from the southeast Missouri/northeast Arkansas border vicinity into Kentucky and Tennessee. This includes the possibility of some supercells and well-organized clusters in the presence of 35-40 kt effective shear. Pockets of wind damage will be the most common risk, but some tornado potential will exist as well. Additional severe storms capable of wind damage are also expected farther eastward into the Carolinas this afternoon through around mid-evening. Texas Panhandle/West Texas late this afternoon/evening Though forcing for ascent will be weak at best this far south, strong surface heating/mixing along the lee trough/dryline could support high-based thunderstorm development late this afternoon. Inverted-V profiles will favor the potential for isolated severe outflow gusts of 60-75 mph.