Montana Severe Flash Flood Warning | Effective 07/17/2026 13:16

Headline: 
Flash Flood Warning issued July 17 at 2:16PM MDT until July 17 at 5:15PM MDT by NWS Billings MT
Event: 
Flash Flood Warning
Urgency: 
Immediate
Effective: 
July 17, 2026 - 1:16pm
Expires: 
July 17, 2026 - 4:15pm
Description: 
FFWBYZ The National Weather Service in Billings has issued a * Flash Flood Warning for... Central Park County in south central Montana... West Central Sweet Grass County in south central Montana... * Until 515 PM MDT. * At 216 PM MDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1 and 2 inches of rain have fallen. Additional rainfall amounts of 0.5 to 1 inch are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar indicated. IMPACT...Flash flooding of small creeks and streams, including the Boulder River south of Mc Leod, as well as other poor drainage and low-lying areas. * Some locations that will experience flash flooding include... Mainly rural areas of Central Park and West Central Sweet Grass Counties.
Instruction: 
In hilly terrain there are hundreds of low water crossings which are potentially dangerous in heavy rain. Do not attempt to cross flooded roads. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Flooding is occurring or is imminent. It is important to know where you are relative to streams, rivers, or creeks which can become killers in heavy rains. Campers and hikers should avoid streams or creeks.
Area Description: 
Park, MT; Sweet Grass, MT
Forcast Office: 
NWS Billings MT