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Home Return to list Heat Advisory 0006 Issued by the Boise Forecast Office
Action: New Issued At: 2026-08-05 13:00:52 741 WWUS75 KBOI 051800 NPWBOI URGENT - WEATHER MESSAGE National Weather Service Boise ID 1200 PM MDT Wed Aug 5 2026 IDZ012-014>016-029-030-033-ORZ061>064-061000- /O.NEW.KBOI.HT.Y.0006.260806T2000Z-260809T0300Z/ Lower Treasure Valley-Upper Treasure Valley-Southwest Highlands- Western Magic Valley-Owyhee Mountains-Southern Twin Falls County- Upper Weiser River-Harney County-Baker County-Malheur County- Oregon Lower Treasure Valley- Including the cities of Council, Baker, Dunnean, New Princeton, Mesa, Burns, Ontario, Goodrich, Fruitvale, Hollister, Cambridge, Three Creek, Silver City, Caldwell, Indian Valley, Venator, Boise, Rogerson, Glendale, Buchanan, Diamond, Riddle, Grasmere, Nyssa, Twin Falls, Crane, Murphy Hot Springs, Nampa, Malheur City, and Reynolds 1200 PM MDT Wed Aug 5 2026 /1100 AM PDT Wed Aug 5 2026/ ...HEAT ADVISORY IN EFFECT FROM 2 PM MDT /1 PM PDT/ THURSDAY TO 9 PM MDT /8 PM PDT/ SATURDAY... * WHAT...Afternoon temperatures in the triple digits for lower elevations and the high desert, mid to upper 90s for higher terrain. Some mild relief overnight with minimum temperatures in the mid to upper 60s in lower elevations and 50s in the higher terrain. * WHERE...Portions of south central and southwest Idaho and northeast and southeast Oregon. * WHEN...From 2 PM MDT /1 PM PDT/ Thursday to 9 PM MDT /8 PM PDT/ Saturday. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. 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 heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ JM Action: Continued Issued At: 2026-08-06 05:00:07 089 WWUS75 KBOI 060959 NPWBOI URGENT - WEATHER MESSAGE National Weather Service Boise ID 359 AM MDT Thu Aug 6 2026 IDZ012-014>016-029-030-033-ORZ061>064-062100- /O.CON.KBOI.HT.Y.0006.260806T2000Z-260809T0300Z/ Lower Treasure Valley-Upper Treasure Valley-Southwest Highlands- Western Magic Valley-Owyhee Mountains-Southern Twin Falls County- Upper Weiser River-Harney County-Baker County-Malheur County- Oregon Lower Treasure Valley- Including the cities of Reynolds, Silver City, Nampa, Grasmere, Crane, Glendale, Venator, Twin Falls, Malheur City, Council, Mesa, Diamond, Dunnean, Cambridge, Hollister, Caldwell, Baker, Nyssa, Fruitvale, Three Creek, Burns, Rogerson, New Princeton, Indian Valley, Boise, Ontario, Riddle, Buchanan, Murphy Hot Springs, and Goodrich 359 AM MDT Thu Aug 6 2026 /259 AM PDT Thu Aug 6 2026/ ...HEAT ADVISORY REMAINS IN EFFECT FROM 2 PM MDT /1 PM PDT/ THIS AFTERNOON TO 9 PM MDT /8 PM PDT/ SATURDAY... * WHAT...Afternoon temperatures in the triple digits for lower elevations and the high desert, mid to upper 90s for higher terrain. Some mild relief overnight with minimum temperatures in the mid to upper 60s in lower elevations and 50s in the higher terrain. * WHERE...Portions of south central and southwest Idaho and northeast and southeast Oregon. * WHEN...From 2 PM MDT /1 PM PDT/ this afternoon to 9 PM MDT /8 PM PDT/ Saturday. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. 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 heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ CH Action: Continued Issued At: 2026-08-06 14:59:30 311 WWUS75 KBOI 061959 NPWBOI URGENT - WEATHER MESSAGE National Weather Service Boise ID 159 PM MDT Thu Aug 6 2026 IDZ012-014>016-029-030-033-ORZ061>064-071200- /O.CON.KBOI.HT.Y.0006.260806T2000Z-260809T0300Z/ Lower Treasure Valley-Upper Treasure Valley-Southwest Highlands- Western Magic Valley-Owyhee Mountains-Southern Twin Falls County- Upper Weiser River-Harney County-Baker County-Malheur County- Oregon Lower Treasure Valley- Including the cities of Indian Valley, Boise, Twin Falls, Buchanan, Three Creek, Silver City, Glendale, New Princeton, Dunnean, Diamond, Rogerson, Baker, Murphy Hot Springs, Malheur City, Grasmere, Cambridge, Nyssa, Riddle, Hollister, Goodrich, Mesa, Ontario, Reynolds, Caldwell, Nampa, Venator, Fruitvale, Burns, Crane, and Council 159 PM MDT Thu Aug 6 2026 /1259 PM PDT Thu Aug 6 2026/ ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT /8 PM PDT/ SATURDAY... * WHAT...Afternoon high temperatures 95 to 105 degrees at lower elevations and desert areas. Mild relief at night with low temperatures in the 60s at lower elevations and upper 40s through 50s in the higher terrain. * WHERE...Portions of south central and southwest Idaho and northeast and southeast Oregon. * WHEN...Until 9 PM MDT /8 PM PDT/ Saturday. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. 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 heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ LC Action: Continued Issued At: 2026-08-07 00:39:20 604 WWUS75 KBOI 070539 NPWBOI URGENT - WEATHER MESSAGE National Weather Service Boise ID 1139 PM MDT Thu Aug 6 2026 IDZ012-014>016-029-030-033-ORZ061>064-072100- /O.CON.KBOI.HT.Y.0006.000000T0000Z-260809T0300Z/ Lower Treasure Valley-Upper Treasure Valley-Southwest Highlands- Western Magic Valley-Owyhee Mountains-Southern Twin Falls County- Upper Weiser River-Harney County-Baker County-Malheur County- Oregon Lower Treasure Valley- Including the cities of Nyssa, Three Creek, Fruitvale, Mesa, Council, Reynolds, Burns, Rogerson, Cambridge, Baker, Crane, Caldwell, Hollister, Indian Valley, Ontario, Goodrich, New Princeton, Dunnean, Diamond, Venator, Twin Falls, Nampa, Buchanan, Riddle, Silver City, Boise, Glendale, Malheur City, Grasmere, and Murphy Hot Springs 1139 PM MDT Thu Aug 6 2026 /1039 PM PDT Thu Aug 6 2026/ ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT /8 PM PDT/ SATURDAY... * WHAT...Afternoon high temperatures 95 to 105 degrees at lower elevations and desert areas. Mild relief at night with low temperatures in the 60s at lower elevations and upper 40s through 50s in the higher terrain. * WHERE...Portions of south central and southwest Idaho and northeast and southeast Oregon. * WHEN...Until 9 PM MDT /8 PM PDT/ Saturday. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. 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 heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ NF Action: Continued Issued At: 2026-08-07 15:29:55 632 WWUS75 KBOI 072029 NPWBOI URGENT - WEATHER MESSAGE National Weather Service Boise ID 229 PM MDT Fri Aug 7 2026 IDZ012-014>016-029-030-033-ORZ061>064-082100- /O.CON.KBOI.HT.Y.0006.000000T0000Z-260809T0300Z/ Lower Treasure Valley-Upper Treasure Valley-Southwest Highlands- Western Magic Valley-Owyhee Mountains-Southern Twin Falls County- Upper Weiser River-Harney County-Baker County-Malheur County- Oregon Lower Treasure Valley- Including the cities of Indian Valley, Twin Falls, Buchanan, Nyssa, Riddle, Reynolds, Venator, Goodrich, Grasmere, Silver City, Council, Fruitvale, New Princeton, Caldwell, Diamond, Mesa, Murphy Hot Springs, Burns, Three Creek, Cambridge, Rogerson, Nampa, Malheur City, Ontario, Hollister, Boise, Baker, Dunnean, Crane, and Glendale 229 PM MDT Fri Aug 7 2026 /129 PM PDT Fri Aug 7 2026/ ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT /8 PM PDT/ SATURDAY... * WHAT...High temperatures 95 to 105 degrees at lower elevations and desert areas. Some relief at night with low temperatures in the 60s at lower elevations and upper 40s through 50s in the higher terrain. * WHERE...Portions of south central and southwest Idaho and northeast and southeast Oregon. * WHEN...Until 9 PM MDT /8 PM PDT/ Saturday. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. 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 heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ LC Action: Continued Issued At: 2026-08-08 00:58:14 581 WWUS75 KBOI 080558 NPWBOI URGENT - WEATHER MESSAGE National Weather Service Boise ID 1158 PM MDT Fri Aug 7 2026 IDZ012-014>016-029-030-033-ORZ061>064-082100- /O.CON.KBOI.HT.Y.0006.000000T0000Z-260809T0300Z/ Lower Treasure Valley-Upper Treasure Valley-Southwest Highlands- Western Magic Valley-Owyhee Mountains-Southern Twin Falls County- Upper Weiser River-Harney County-Baker County-Malheur County- Oregon Lower Treasure Valley- Including the cities of Murphy Hot Springs, Crane, Silver City, Diamond, Baker, Cambridge, New Princeton, Ontario, Twin Falls, Riddle, Nampa, Reynolds, Glendale, Mesa, Venator, Indian Valley, Council, Burns, Boise, Caldwell, Dunnean, Hollister, Three Creek, Rogerson, Malheur City, Nyssa, Grasmere, Goodrich, Buchanan, and Fruitvale 1158 PM MDT Fri Aug 7 2026 /1058 PM PDT Fri Aug 7 2026/ ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT /8 PM PDT/ SATURDAY... * WHAT...High temperatures 95 to 103 degrees at lower elevations and desert areas. Some relief at night with low temperatures in the 60s at lower elevations and upper 40s through 50s in the higher terrain. * WHERE...Portions of south central and southwest Idaho and northeast and southeast Oregon. * WHEN...Until 9 PM MDT /8 PM PDT/ Saturday. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. 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 heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ NF Action: Continued Issued At: 2026-08-08 14:49:39 302 WWUS75 KBOI 081949 NPWBOI URGENT - WEATHER MESSAGE National Weather Service Boise ID 149 PM MDT Sat Aug 8 2026 IDZ012-014>016-029-030-033-ORZ061>064-090300- /O.CON.KBOI.HT.Y.0006.000000T0000Z-260809T0300Z/ Lower Treasure Valley-Upper Treasure Valley-Southwest Highlands- Western Magic Valley-Owyhee Mountains-Southern Twin Falls County- Upper Weiser River-Harney County-Baker County-Malheur County- Oregon Lower Treasure Valley- Including the cities of Nampa, Council, Baker, Indian Valley, Burns, Ontario, Buchanan, Malheur City, Mesa, Grasmere, Rogerson, Goodrich, Reynolds, Riddle, Glendale, Silver City, Boise, Cambridge, Murphy Hot Springs, Caldwell, Fruitvale, Crane, New Princeton, Venator, Diamond, Three Creek, Twin Falls, Nyssa, Dunnean, and Hollister 149 PM MDT Sat Aug 8 2026 /1249 PM PDT Sat Aug 8 2026/ ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT /8 PM PDT/ THIS EVENING... * WHAT...High temperatures 95 to 100 degrees in the lower valleys, and 85 to 95 degrees at higher elevations. * WHERE...Portions of south central and southwest Idaho and northeast and southeast Oregon. * WHEN...Until 9 PM MDT /8 PM PDT/ this evening. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. 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 heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ LC Action: Expired Issued At: 2026-08-08 21:51:52 790 WWUS75 KBOI 090251 NPWBOI URGENT - WEATHER MESSAGE National Weather Service Boise ID 851 PM MDT Sat Aug 8 2026 IDZ012-014>016-029-030-033-ORZ061>064-090400- /O.EXP.KBOI.HT.Y.0006.000000T0000Z-260809T0300Z/ Lower Treasure Valley-Upper Treasure Valley-Southwest Highlands- Western Magic Valley-Owyhee Mountains-Southern Twin Falls County- Upper Weiser River-Harney County-Baker County-Malheur County- Oregon Lower Treasure Valley- Including the cities of Hollister, Glendale, Boise, Indian Valley, Rogerson, Nyssa, Twin Falls, Murphy Hot Springs, Crane, Goodrich, Caldwell, Silver City, Cambridge, Buchanan, Burns, Riddle, Diamond, Malheur City, Reynolds, Council, Ontario, Mesa, Baker, Nampa, Dunnean, New Princeton, Three Creek, Grasmere, Venator, and Fruitvale 851 PM MDT Sat Aug 8 2026 /751 PM PDT Sat Aug 8 2026/ ...HEAT ADVISORY WILL EXPIRE AT 9 PM MDT /8 PM PDT/ THIS EVENING... The threat has ended. $$ JDS | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||