Boise, Idaho
Regional Weather Alerts
| Alert: | Heat Advisory |
| Area(s): | Lower Treasure Valley; Upper Treasure Valley; Southwest Highlands; Western Magic Valley; Southern Twin Falls County; Upper Weiser River; Oregon Lower Treasure Valley |
| Effective: | 2026-07-09 @ 1:56 pm -> 2026-07-10 @ 4:00 pm |
| Onset: | 2026-07-10 @ 1:00 pm -> 2026-07-11 @ 10:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Boise ID on 2026-07-09 @ 1:56 pm |
| Headline: | Heat Advisory issued July 9 at 12:56PM MDT until July 11 at 9:00PM MDT by NWS Boise ID |
| Description: |
* WHAT...Temperatures up to 103 degrees expected. * WHERE...Portions of south central and southwest Idaho and southeast Oregon. * WHEN...From noon MDT /11 AM PDT/ Friday to 9 PM MDT /8 PM PDT/ Saturday. * IMPACTS...Hot temperatures may cause heat illnesses, especially for the young, elderly, and animals. * ADDITIONAL DETAILS...Warm overnight temperatures will limit recovery. |
| Alert: | Heat Advisory |
| Area(s): | Western Lemhi County; Eastern Lemhi County |
| Effective: | 2026-07-09 @ 1:35 pm -> 2026-07-10 @ 1:45 pm |
| Onset: | 2026-07-11 @ 1:00 pm -> 2026-07-12 @ 10:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-07-09 @ 1:35 pm |
| Headline: | Heat Advisory issued July 9 at 12:35PM MDT until July 12 at 9:00PM MDT by NWS Missoula MT |
| Description: |
* WHAT...Moderate risk of heat effects expected below 5000 feet. Temperatures between 97 and 106 degrees expected. * WHERE...Valleys of Eastern Lemhi County and Western Lemhi County. * WHEN...From noon Saturday to 9 PM MDT Sunday. * 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. |
| Alert: | Heat Advisory |
| Area(s): | Lower Hells Canyon/Salmon River Region |
| Effective: | 2026-07-09 @ 1:35 pm -> 2026-07-10 @ 1:45 pm |
| Onset: | 2026-07-10 @ 1:00 pm -> 2026-07-12 @ 10:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-07-09 @ 1:35 pm |
| Headline: | Heat Advisory issued July 9 at 12:35PM MDT until July 12 at 9:00PM MDT by NWS Missoula MT |
| Description: |
* WHAT...Moderate risk of heat effects expected below 3000 feet. Temperatures up to 107 degrees expected. * WHERE...Lower Hells Canyon/Salmon River Region. * WHEN...From 11 AM Friday to 8 PM PDT Sunday. * 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. |
| Alert: | Heat Advisory |
| Area(s): | Southern Clearwater Mountains |
| Effective: | 2026-07-09 @ 1:35 pm -> 2026-07-10 @ 1:45 pm |
| Onset: | 2026-07-11 @ 1:00 pm -> 2026-07-12 @ 10:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-07-09 @ 1:35 pm |
| Headline: | Heat Advisory issued July 9 at 12:35PM MDT until July 12 at 9:00PM MDT by NWS Missoula MT |
| Description: |
* WHAT...Moderate risk of heat effects expected below 3000 feet. Temperatures ranging from 99 to 105 degrees expected. * WHERE...Salmon River Valley, Lowell, Fenn and Moose Creek. * WHEN...From 11 AM Saturday to 8 PM PDT Sunday. * 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. |
| Alert: | Extreme Heat Warning |
| Area(s): | Southern Hills/Albion Mountains; Raft River Region; Marsh and Arbon Highlands; Franklin/Eastern Oneida Region |
| Effective: | 2026-07-09 @ 12:33 pm -> 2026-07-10 @ 7:00 am |
| Onset: | 2026-07-11 @ 1:00 pm -> 2026-07-12 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Pocatello ID on 2026-07-09 @ 12:33 pm |
| Headline: | Extreme Heat Warning issued July 9 at 11:33AM MDT until July 12 at 9:00PM MDT by NWS Pocatello ID |
| Description: |
* WHAT...Dangerously hot conditions with temperatures up to 102 expected. * WHERE...Franklin/Eastern Oneida Region, Marsh and Arbon Highlands, Raft River Region, and Southern Hills/Albion Mountains. * WHEN...From noon Saturday to 9 PM MDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. |
| Alert: | Heat Advisory |
| Area(s): | Shoshone/Lava Beds; Arco/Mud Lake Desert; Upper Snake River Plain; Lower Snake River Plain; Eastern Magic Valley; Bear River Range; Bear Lake Valley; Blackfoot Mountains; Caribou Range; Big Hole Mountains; Teton Valley; Centennial Mountains/Island Park; Beaverhead/Lemhi Highlands; Lost River Valleys; Challis/Pahsimeroi Valleys; Wood River Foothills |
| Effective: | 2026-07-09 @ 12:33 pm -> 2026-07-10 @ 7:00 am |
| Onset: | 2026-07-11 @ 1:00 pm -> 2026-07-12 @ 10:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Pocatello ID on 2026-07-09 @ 12:33 pm |
| Headline: | Heat Advisory issued July 9 at 11:33AM MDT until July 12 at 9:00PM MDT by NWS Pocatello ID |
| Description: |
* WHAT...Temperatures up to 101 expected. * WHERE...Portions of central, eastern, south central, and southeast Idaho. * WHEN...From noon Saturday to 9 PM MDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. |