Immediate

Responsive action SHOULD be taken immediately

Arkansas Severe Flood Warning | Effective 09/18/2026 17:43

...The Flood Warning continues for the following river in Arkansas... Cache River Near Patterson affecting Jackson and Woodruff Counties. For the Cache River...including Patterson...Minor flooding is forecast. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Cache River near Patterson. * WHEN...Until Tuesday evening. * IMPACTS...At 8.0 feet, Low swampy timberland along the river begins to flood. At 9.0 feet, Low swampy timberland along the river begins

New Mexico Severe Flash Flood Warning | Effective 09-18-2026 17:30

At 630 PM MDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1.5 and 2.5 inches of rain have fallen. The expected rainfall rate is 2 to 4 inches in 1 hour. Additional rainfall amounts of 0.5 to 1.5 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Life threatening flash flooding. Thunderstorms producing flash flooding. SOURCE...Radar indicated. IMPACT...Life threatening flash flooding of creeks and streams, urban

Idaho Severe Flash Flood Warning | Effective 09/18/2026 16:47

FFWBOI The National Weather Service in Boise has issued a * Flash Flood Warning for... The Wapiti Burn Area in... Northeastern Boise County in southwestern Idaho... * Until 815 PM MDT. * At 547 PM MDT, emergency management reported thunderstorms producing heavy rain over the Wapiti Burn Area. Flash flooding is ongoing or expected to begin shortly. Excessive rainfall over the burn scar will result in debris flow moving through the High Drainage Test. The debris flow can consist of rock, mud, vegetation

Montana Severe Flash Flood Warning | Effective 09/18/2026 17:02

FFWBYZ The National Weather Service in Billings has issued a * Flash Flood Warning for... Southwestern Golden Valley County in central Montana... Southeastern Wheatland County in central Montana... * Until 900 PM MDT. * At 602 PM MDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 0.7 and 1.5 inches of rain have fallen. Additional rainfall amounts up to 1 inch are possible in the warned area. Flash flooding is ongoing or expected to begin shortly.

North Carolina Severe Severe Thunderstorm Warning | Effective 09/18/2026 17:08

SVRGSP The National Weather Service in Greenville-Spartanburg has issued a * Severe Thunderstorm Warning for... Northeastern Swain County in western North Carolina... * Until 900 PM EDT. * At 807 PM EDT, a severe thunderstorm was located 8 miles southeast of Gatlinburg, or near Smoky Mountains-Newfound Gap, moving south at 15 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Minor hail damage to vehicles is expected. Expect wind damage to trees and power lines. * Locations impacted include...

Colorado Severe Severe Thunderstorm Warning | Effective 09/18/2026 17:14

SVRGJT The National Weather Service in Grand Junction has issued a * Severe Thunderstorm Warning for... South central Moffat County in northwestern Colorado... * Until 700 PM MDT. * At 614 PM MDT, a severe thunderstorm was located 28 miles northeast of Rangely, or 45 miles west of Craig, moving northeast at 30 mph. HAZARD...Ping pong ball size hail. SOURCE...Radar indicated. IMPACT...People and animals outdoors will be injured. Expect damage to roofs, siding, windows, and vehicles.

South Carolina Severe Severe Thunderstorm Warning | Effective 09/18/2026 17:19

SVRGSP The National Weather Service in Greenville-Spartanburg has issued a * Severe Thunderstorm Warning for... North central Anderson County in Upstate South Carolina... Central Pickens County in Upstate South Carolina... * Until 915 PM EDT. * At 819 PM EDT, a severe thunderstorm was located 5 miles northeast of Pickens, moving south at 15 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Minor hail damage to vehicles is expected. Expect wind damage to trees and power lines.

Tennessee Severe Severe Thunderstorm Warning | Effective 09/18/2026 17:23

At 823 PM EDT, a severe thunderstorm was located near Smoky Mountains-Newfound Gap, or 8 miles southeast of Gatlinburg, moving south at 10 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... Smoky Mountains-Newfound Gap, Smoky Mountains-Balsam Mountain, and Great Smoky Mountains National Park.
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