Hydrologic Outlook issued June 18 at 3:55PM UTC by NWS Missoula MT
ESFMSO Where: Flathead and Lincoln Counties in northwest Montana What: Confidence is trending higher that a prolonged rain event will produce 2 to 4 inches of rainfall in a 48hr period, starting Friday evening and lasting into Sunday. The result will be the potential for rock and debris slides along steep terrain in Glacier National Park and Forest Service roads in the Flathead and Kootenai National Forests. Low land ponding of water will be possible in poor drainage areas. Consider delaying backcountry travel this weekend, or plan accordingly as conditions will be cold and wet, and moderate to heavy snow
Winter Storm Watch issued June 18 at 9:36AM MDT until June 22 at 12:00PM MDT by NWS Missoula MT
* WHAT...Heavy wet snow possible. Chance of moderate to major impacts from snow is at least 50 percent. Total snow accumulations up to a foot for elevations at and above 6000 feet and 4 inches possible down to 4000 feet. * WHERE...Glacier National Park higher elevations including Going-to-the-Sun Road and Logan Pass, Marias Pass, Polebridge, and backcountry of the Flathead National Forest. * WHEN...From Saturday afternoon through Sunday morning. * IMPACTS...For MODERATE impacts from snow, expect disruptions to normal activities. Hazardous traveling conditions. Use extra caution while driving. Closures and disruptions to infrastructure may occur. For MAJOR impacts from snow
Heat Advisory issued June 8 at 3:29PM PDT until June 10 at 9:00PM PDT by NWS Missoula MT
* WHAT...Major risk of heat effects expected. Temperatures in the upper 90s and up to 105F are expected in the afternoons with overnight temperatures only dropping down to the upper 50s to upper 60s in the early morning hours. * WHERE...Lower Hells Canyon/Salmon River Region and Orofino/Grangeville Region. * WHEN...From noon Monday to 9 PM PDT Tuesday. * IMPACTS...This level of heat affects anyone without effective cooling and/or adequate hydration. Impacts likely in some health systems, heat-sensitive industries and infrastructure.
VIP Notice – Missoula, MT
Notice: Expect VIP movement June 07-10, 2025 in the vicinity of Missoula, MT. Pilots can expect temporary airspace restrictions in conjunction with this VIP movement. The FAA recommends that all aircraft operators check NOTAMs OFTEN for temporary airspace restrictions prior to operations within this region. Specific instructions and restrictions are available at http://tfr.faa.gov* once the NOTAM has been issued. *Depicted TFR data may not be a complete listing. Pilots should not use the information on this website for flight planning purposes. For the latest information, call your local Flight Service Station at 1-800-WX-BRIEF.
Frost Advisory issued June 2 at 2:07PM MDT until June 3 at 8:00AM MDT by NWS Missoula MT
* WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Salmon and vicinity. * WHEN...From 2 AM to 8 AM MDT Tuesday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.
Heat Advisory issued May 31 at 7:17AM MDT until June 1 at 1:00AM MDT by NWS Missoula MT
* WHAT...Moderate risk of heat effects expected. * WHERE...Lower Hells Canyon/Salmon River Region and Orofino/Grangeville Region. * WHEN...From noon today to midnight PDT tonight. * IMPACTS...This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. Impacts possible in some health systems and in heat-sensitive industries. * ADDITIONAL DETAILS...Early-season high temperatures expected to reach 90 to 102 degrees. Be mindful that rivers and streams continue to flow cold, high, and fast with murky waters potentially obscuring underwater hazards.
Heat Advisory issued May 31 at 7:17AM MDT until May 31 at 10:00PM MDT by NWS Missoula MT
* WHAT...Moderate risk of heat effects expected. * WHERE...For elevations below 4000 feet, including Lowell and Elk City. * WHEN...From noon today to 9 PM PDT this evening. * IMPACTS...This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. Impacts possible in some health systems and in heat-sensitive industries. * ADDITIONAL DETAILS...Early-season high temperatures expected to reach 92 to 101 degrees. Be mindful that rivers and streams continue to flow cold, high, and fast with murky waters potentially obscuring underwater hazards.
Heat Advisory issued May 31 at 7:17AM MDT until May 31 at 9:00PM MDT by NWS Missoula MT
* WHAT...Moderate risk of heat effects expected. * WHERE...In Idaho, Eastern Lemhi County. In Montana, Flathead/Mission Valleys, Kootenai/Cabinet Region, Lower Clark Fork Region, and Missoula/Bitterroot Valleys. * WHEN...From noon today to 9 PM MDT this evening. * IMPACTS...This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. Impacts possible in some health systems and in heat-sensitive industries. * ADDITIONAL DETAILS...Early-season high temperatures expected to reach 90 to 98 degrees. Be mindful that rivers and streams continue to flow cold, high, and fast with murky waters potentially obscuring underwater hazards.
Heat Advisory issued May 29 at 11:37AM MDT until May 31 at 9:00PM MDT by NWS Missoula MT
* WHAT...Moderate risk of heat effects expected. * WHERE...In Idaho, Eastern Lemhi County. In Montana, Flathead/Mission Valleys, Kootenai/Cabinet Region, Lower Clark Fork Region, and Missoula/Bitterroot Valleys. * WHEN...From noon to 9 PM MDT Saturday. * IMPACTS...This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. Impacts possible in some health systems and in heat-sensitive industries.
Winter Weather Advisory issued May 17 at 1:13PM MDT until May 18 at 6:00PM MDT by NWS Missoula MT
* WHAT...Wet snow expected above 5000 feet. Likelihood of moderate impacts from 3 to 6 inches of snow is greater than 90 percent, and up to a 50 percent chance of isolated major impacts from 6 to 10 inches or more of snow. * WHERE...Marias Pass. * WHEN...From 6 AM to 6 PM MDT Sunday. * IMPACTS...For MODERATE impacts from snow, expect disruptions to normal activities. Hazardous traveling conditions. Use extra caution while driving. Closures and disruptions to infrastructure may occur.