Severe

Significant threat to life or property

Wyoming Winter Storm Warning | Effective 05/18/2026 09:42

* WHAT...Snow expected. Additional snow accumulations up to 3 inches, with higher amounts near Sinks Canyon Park. * WHERE...Lander Foothills. * WHEN...Until 6 PM MDT this evening. * IMPACTS...Travel could be difficult. Heavy snow could break tree limbs as many trees have leafed out. If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. For graphical depictions of the snowfall forecast, including the official NWS forecast, high end amounts, and low end amounts, visit

Indiana Severe Thunderstorm Warning | Effective 05/18/2026 09:43

SVRIWX The National Weather Service in Northern Indiana has issued a * Severe Thunderstorm Warning for... White County in northwestern Indiana... Pulaski County in northwestern Indiana... Starke County in northwestern Indiana... * Until 130 PM EDT/1230 PM CDT/. * At 1243 PM EDT/1143 AM CDT/, a severe thunderstorm was located over Francesville, or 12 miles east of Rensselaer, moving east at 45 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees.

Nebraska Flood Watch | Effective 05/18/2026 09:01

* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of southeast Nebraska, including the following counties, Gage, Jefferson, Johnson, Lancaster, Nemaha, Otoe, Pawnee, Richardson, Saline and Seward. * WHEN...Through Tuesday 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...

Iowa Flood Watch | Effective 05/18/2026 09:01

* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of southwest Iowa, including the following counties, Fremont and Page. * WHEN...Through Tuesday 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... - Several inches of rain have fallen across portions of southeastern Nebraska. Additional rainfall is expected through

Indiana Severe Thunderstorm Warning | Effective 05/18/2026 09:19

SVRLOT The National Weather Service in Chicago has issued a * Severe Thunderstorm Warning for... Newton County in northwestern Indiana... Benton County in northwestern Indiana... Porter County in northwestern Indiana... Lake County in northwestern Indiana... Jasper County in northwestern Indiana... * Until 1215 PM CDT/115 PM EDT/. * At 1118 AM CDT/1218 PM EDT/, severe thunderstorms were located along a line extending from near Monee to near St. Anne to near Hoopeston, moving northeast at 50 mph.

Illinois Flood Watch | Effective 05/18/2026 09:22

* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of south central Illinois, including the following areas, Bond IL, Clinton IL, Fayette IL, Marion IL and Washington IL. * WHEN...Until 7 PM CDT this evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Potential rainfall amounts of 1 to 2 inches, with localized higher amounts of 2 to 4 inches.

Missouri Flood Watch | Effective 05/18/2026 09:22

* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of central and east central Missouri, including the following areas, in central Missouri, Boone MO, Callaway MO, Cole MO, Moniteau MO and Osage MO. In east central Missouri, Crawford MO, Franklin MO, Gasconade MO, Montgomery MO, Warren MO and Washington MO. * WHEN...Until 7 PM CDT this evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations.

Illinois, Missouri Flood Watch | Effective 05/18/2026 09:22

* WHAT...Flash Flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of southwest Illinois, including the following areas, Madison IL, Monroe IL and Saint Clair IL and east central Missouri, including the following areas, Jefferson MO, Lincoln MO, Saint Charles MO, Saint Louis City MO and Saint Louis MO. * WHEN...Until 7 PM CDT this evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS...

Iowa Flood Watch | Effective 05/18/2026 08:51

* WHAT...Flooding caused by excessive rainfall is possible. * WHERE...Portions of south central and southwest Iowa, including the following counties, in south central Iowa, Decatur, Ringgold and Wayne. In southwest Iowa, Taylor. * WHEN...From 5 PM CDT this afternoon through Tuesday morning. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS...

Illinois Severe Thunderstorm Warning | Effective 05/18/2026 08:52

At 1052 AM CDT, a severe thunderstorm was located near Edgewood, or 16 miles northwest of Flora, moving northeast at 35 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. Locations impacted include... Effingham, Louisville, Watson, Edgewood, Mason, Bible Grove, Heartville, Iola, Effingham County Airport, Ingraham, and Hord. This includes the following highways...
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