Heat Advisory
URGENT - WEATHER MESSAGE
National Weather Service Salt Lake City UT
943 PM MDT Thu Aug 20 2026
UTZ101>106-211845-
/O.CON.KSLC.HT.Y.0008.000000T0000Z-260822T1300Z/
Great Salt Lake Desert and Mountains-Tooele and Rush Valleys-
Eastern Box Elder County-Northern Wasatch Front-Salt Lake Valley-
Utah Valley-
Including the following locations - Dugway, Lehi, Salt Lake City,
Wendover, West Jordan, Vernon, Brigham City, Ogden, Bountiful,
Payson, Provo, Sandy, Grantsville, Park Valley, Tooele, and Snowville
943 PM MDT Thu Aug 20 2026
...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 AM MDT SATURDAY...
* WHAT...High temperatures to around 100 degrees expected alongside
overnight low temperatures in the low- to mid-70s.
* WHERE...The Wasatch Front, Great Salt Lake Desert and Mountains,
and Tooele and Rush Valleys.
* WHEN...Until 7 AM MDT Saturday.
* IMPACTS...Hot temperatures may cause heat illness. Warm overnight
temperatures will limit the amount of relief from the hot daytime
temperatures, bringing a period of prolonged heat exposure,
especially for vulnerable populations.
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.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Pocatello ID
201 AM MDT Fri Aug 21 2026
IDZ051-054>057-075-220400-
/O.CON.KPIH.HT.Y.0007.260821T1800Z-260822T0400Z/
Shoshone/Lava Beds-Lower Snake River Plain-Eastern Magic Valley-
Southern Hills/Albion Mountains-Raft River Region-Wood River
Foothills-
Including the cities of Fort Hall, Hailey, Burley, Albion, Shelley,
Pocatello, Oakley, Bellevue, Carey, Picabo, Almo, Malta, American
Falls, Richfield, Rockland, Heyburn, Rupert, Blackfoot, Holbrook, and
Shoshone
201 AM MDT Fri Aug 21 2026
...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 10 PM MDT THIS
EVENING...
* WHAT...Temperatures up to 98 expected.
* WHERE...Wood River Foothills, Eastern Magic Valley, Shoshone/Lava
Beds, Lower Snake River Plain, Raft River Region, and Southern
Hills/Albion Mountains.
* WHEN...From noon today to 10 PM MDT this evening.
* IMPACTS...Hot temperatures may cause heat illnesses, including
heatstroke and heat exhaustion.
$$
URGENT - WEATHER MESSAGE
National Weather Service Pocatello ID
201 AM MDT Fri Aug 21 2026
IDZ052-053-058-059-220400-
/O.CON.KPIH.HT.Y.0007.260821T1800Z-260822T0400Z/
Arco/Mud Lake Desert-Upper Snake River Plain-Marsh and Arbon
Highlands-Franklin/Eastern Oneida Region-
Including the cities of Thatcher, Preston, Rexburg, Lava Hot
Springs, Idaho Falls, Downey, INL, St. Anthony, Mud Lake, Craters
of the Moon NM, Inkom, Malad, and McCammon
201 AM MDT Fri Aug 21 2026
...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 10 PM MDT THIS
EVENING...
* WHAT...Temperatures up to 95 expected.
* WHERE...Arco/Mud Lake Desert, Franklin/Eastern Oneida Region, Marsh
and Arbon Highlands, and Upper Snake River Plain.
* WHEN...From noon today to 10 PM MDT this evening.
* IMPACTS...Hot temperatures may cause heat illnesses, including
heatstroke and heat exhaustion.
$$
Visit weather.gov/pocatello for more information.
Messick
URGENT - WEATHER MESSAGE
National Weather Service Pocatello ID
201 AM MDT Fri Aug 21 2026
IDZ061-062-064-065-067-220400-
/O.EXA.KPIH.HT.Y.0007.260821T1800Z-260822T0400Z/
Bear Lake Valley-Blackfoot Mountains-Big Hole Mountains-Teton
Valley-Beaverhead - Lemhi Highlands-
Including the cities of Montpelier, Edie School, Soda Springs,
Georgetown, Driggs, Dubois, Bone, Spencer, St. Charles, Ashton,
Small, Grace, Victor, Tetonia, and Henry
201 AM MDT Fri Aug 21 2026
...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 10 PM MDT THIS
EVENING...
* WHAT...Temperatures up to 95 expected.
* WHERE...Beaverhead - Lemhi Highlands, Big Hole Mountains, Teton
Valley, Bear Lake Valley, and Blackfoot Mountains.
* WHEN...From noon today to 10 PM MDT this evening.
* IMPACTS...Hot temperatures may cause heat illnesses.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Boise ID
216 PM MDT Thu Aug 20 2026
IDZ012-014-016-033-ORZ064-212115-
/O.CON.KBOI.HT.Y.0007.000000T0000Z-260822T0300Z/
Lower Treasure Valley-Upper Treasure Valley-Western Magic Valley-
Upper Weiser River-Oregon Lower Treasure Valley-
Including the cities of Nampa, Boise, Indian Valley, Council,
Glendale, Cambridge, Ontario, Caldwell, Nyssa, Goodrich, Twin Falls,
Fruitvale, and Mesa
216 PM MDT Thu Aug 20 2026 /116 PM PDT Thu Aug 20 2026/
...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT /8 PM PDT/
FRIDAY...
* WHAT...High temperatures 98 to 104 degrees both today and Friday.
* WHERE...Portions of south central and southwest Idaho and southeast
Oregon.
* WHEN...Until 9 PM MDT /8 PM PDT/ Friday.
* 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
