Expected

Responsive action SHOULD be taken soon (within next hour)

Missouri Flood Warning | Effective 05/18/2026 23:30

* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Northern Nodaway County in northwestern Missouri... Northwestern Worth County in northwestern Missouri... * WHEN...Until 930 AM CDT Tuesday. * IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is imminent or occurring. * ADDITIONAL DETAILS... - At 130 AM CDT, emergency management reported heavy rain in the warned area due to thunderstorms. Flooding is already occurring.

Illinois Special Weather Statement | Effective 05/18/2026 23:31

At 131 AM CDT, Doppler radar was tracking strong thunderstorms along a line extending from near Orion to near Rio. Movement was east at 50 mph. HAZARD...Wind gusts up to 50 mph. SOURCE...Radar indicated. IMPACT...Strong winds could break small tree limbs and blow around unsecured objects. Locations impacted include... Kewanee, Cambridge, Galva, Orion, Atkinson, Annawan, Woodhull, New Windsor, Alpha, Andover, Lynn Center, Osco, Bishop Hill, Henry County

New Hampshire Heat Advisory | Effective 05/18/2026 23:34

* WHAT...Heat index values up to 95 expected. * WHERE...Coastal Rockingham County. * WHEN...From 11 AM this morning to 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...It will remain warm tonight as overnight lows only dip into the upper 60s to lower 70s. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and

New Hampshire Heat Advisory | Effective 05/18/2026 23:34

* WHAT...Heat index values up to 95 expected. * WHERE...Western and Central Hillsborough, Eastern Hillsborough, and Interior Rockingham Counties. * WHEN...From 11 AM this morning to 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...It will remain warm tonight as overnight lows only dip into the upper 60s to lower 70s. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning

Florida Rip Current Statement | Effective 05/18/2026 23:40

* WHAT...Dangerous rip currents. * WHERE...Coastal Broward County and Coastal Miami Dade County. * WHEN...Through Wednesday evening. * IMPACTS...Rip currents can sweep even the best swimmers away from shore into deeper water. Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help.

Florida Rip Current Statement | Effective 05/18/2026 23:40

* WHAT...Dangerous rip currents. * WHERE...Coastal Palm Beach County. * WHEN...Through Wednesday evening. * IMPACTS...Rip currents can sweep even the best swimmers away from shore into deeper water. Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help.

Wyoming Freeze Warning | Effective 05/18/2026 23:42

...FREEZE WATCH REMAINS IN EFFECT FROM THIS EVENING THROUGH WEDNESDAY MORNING... * WHAT...For the Freeze Warning tonight, sub-freezing temperatures as low as 12 degrees above zero expected. For the Freeze Watch Tuesday night, sub-freezing temperatures as low as 18 possible. * WHERE...Central Carbon County, Ferris/Seminoe/Shirley Mountains, North Snowy Range Foothills, Shirley Basin, and Southwest Carbon County. * WHEN...For the Freeze Warning, until noon MDT today. For the

Nebraska, Wyoming Freeze Warning | Effective 05/18/2026 23:42

* WHAT...Sub-freezing temperatures as low as 24 degrees. * WHERE...In Nebraska, Northern Sioux County, Scotts Bluff County, and Southern Sioux County. In Wyoming, Niobrara County, Central Laramie County, Central Laramie Range and Southwest Platte County, East Laramie County, East Platte County, Goshen County, and South Laramie Range Foothills. * WHEN...Until 10 AM MDT this morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor

Wyoming Freeze Warning | Effective 05/18/2026 23:42

...FREEZE WATCH REMAINS IN EFFECT FROM THIS EVENING THROUGH WEDNESDAY MORNING... * WHAT...For the Freeze Warning tonight, sub-freezing temperatures as low as 18 degrees expected. For the Freeze Watch Tuesday night, sub-freezing temperatures as low as 20 possible. * WHERE...Upper North Platte River Basin. * WHEN...For the Freeze Warning, until 10 AM MDT this morning. For the Freeze Watch, from this evening through Wednesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other

Wyoming Freeze Warning | Effective 05/18/2026 23:42

...FREEZE WATCH REMAINS IN EFFECT FROM THIS EVENING THROUGH WEDNESDAY MORNING... * WHAT...For the Freeze Warning tonight, sub-freezing temperatures as low as 12 degrees above zero expected. For the Freeze Watch Tuesday night, sub-freezing temperatures as low as 23 possible. * WHERE...South Laramie Range. * WHEN...For the Freeze Warning, until 10 AM MDT this morning. For the Freeze Watch, from this evening through Wednesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other
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