Severe

Significant threat to life or property

Michigan Severe Thunderstorm Warning | Effective 05/18/2026 12:18

At 317 PM EDT, a severe thunderstorm was located near Tomahawk Creek Flooding, or 12 miles north of Atlanta, moving northeast at 50 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. This severe storm will be near... Royston around 325 PM EDT. Other locations impacted by this severe thunderstorm include Clear Lake State Park. For your protection move to an interior room on the lowest floor of a building.

Michigan Severe Thunderstorm Warning | Effective 05/18/2026 12:19

At 319 PM EDT, severe thunderstorms were located along a line extending from near Lakeview to 5 miles west of St. Johns to near Litchfield, moving northeast at 55 mph. HAZARD...70 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect considerable tree damage. Wind damage is also likely to mobile homes, roofs, and outbuildings. Locations impacted include... Lansing... Ionia... Charlotte...

Indiana Severe Thunderstorm Warning | Effective 05/18/2026 12:19

SVRIWX The National Weather Service in Northern Indiana has issued a * Severe Thunderstorm Warning for... Wells County in northeastern Indiana... Adams County in northeastern Indiana... * Until 400 PM EDT. * At 318 PM EDT, a severe thunderstorm was located over Bluffton, moving east at 60 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Bluffton, Decatur, Berne, Ossian, Geneva, Monroe, Preble,

Iowa, Nebraska Flood Watch | Effective 05/18/2026 12:20

* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of southwest Iowa, including the following counties, Fremont and Page and 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.

Iowa, Nebraska Flood Watch | Effective 05/18/2026 12:20

* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of southwest Iowa, including the following counties, Mills and Montgomery and southeast Nebraska, including the following county, Cass. * 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... - Two to five inches of rain have fallen across portions of

Michigan Severe Thunderstorm Warning | Effective 05/18/2026 12:22

At 320 PM EDT, severe thunderstorms were located along a line extending from 8 miles west of St. Johns to near Capital Region International Airport, moving northeast at 60 mph. THESE ARE DESTRUCTIVE STORMS FOR LANSING AND THE CAPITAL REGION. HAZARD...80 mph wind gusts. SOURCE...Radar indicated. IMPACT...Flying debris will be dangerous to those caught without shelter. Mobile homes will be heavily damaged. Expect considerable damage to roofs, windows, and vehicles. Extensive tree damage and power outages are likely.

Michigan Severe Thunderstorm Warning Severe | Effective 05-18-2026 11:59

Public safety alert, emergency alert, and weather alert Description: SVRGRR The National Weather Service in Grand Rapids has issued a * Severe Thunderstorm Warning for... Northwestern Ingham County in south central Michigan... Southeastern Ionia County in south central Michigan... Clinton County in south central Michigan... Northern Eaton County in south central Michigan... * Until 345 PM EDT. * At 259 PM EDT, severe thunderstorms were located along a line

Wyoming Winter Storm Warning | Effective 05/18/2026 11:46

* WHAT...Heavy snow expected. Additional snow accumulations between 1 and 3 inches. Lower amounts up to 1 inch in the Rock Springs area. Winds gusting as high as 60 mph. * WHERE...East Sweetwater County. * WHEN...Until 6 PM MDT this evening. * IMPACTS...Travel will be very difficult, especially along Interstate 80 due to the crosswind component. 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

Wyoming Winter Storm Warning | Effective 05/18/2026 11:46

* WHAT...Heavy snow possible. Additional snow accumulations between 3 and 6 inches possible. Winds could gust as high as 40 mph. * WHERE...Casper Mountain. * WHEN...Until 6 PM MDT this evening. * IMPACTS...Travel will be very difficult. Areas of blowing snow could significantly reduce visibility. 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.

Wyoming Winter Storm Warning | Effective 05/18/2026 11:46

* WHAT...Heavy snow expected. Total snow accumulations between 1 and 3 inches. Areas of higher amounts up to 4 inches between Hiland and Casper and for the south side of Casper. Winds gusting as high as 40 mph. * WHERE...Natrona County Lower Elevations. * WHEN...Until 6 PM MDT this evening. * IMPACTS...Travel will be difficult, especially along US Highway 20/26 between Hiland and Casper. Heavy snow could break tree limbs as many trees have leafed out.
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