Extreme Heat Watch
URGENT - WEATHER MESSAGE
National Weather Service Flagstaff AZ
1146 AM MST Sat Jul 5 2025
AZZ006-062200-
/O.NEW.KFGZ.XH.A.0002.250708T1700Z-250711T0200Z/
Grand Canyon Country-
Including the cities of Grand Canyon Village, Supai, and North
Rim
1146 AM MST Sat Jul 5 2025
...EXTREME HEAT WATCH IN EFFECT FROM TUESDAY MORNING THROUGH
THURSDAY EVENING BELOW 4000 FEET...
* WHAT...Dangerously hot conditions possible below 4000 feet, with
daytime temperatures ranging from 106 degrees at Havasupai
Gardens, to 113 degrees at Phantom Ranch.
* WHERE...Lower elevations of the Grand Canyon.
* WHEN...From Tuesday morning through Thursday evening.
* IMPACTS...Most individuals will be at risk for heat-related
illnesses without effective cooling or adequate hydration,
especially with prolonged outdoor exposure.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This watch is reserved for only the hottest days of the year and is
issued when temperatures could rise to dangerous levels.
Day hikers on Bright Angel Trail should descend no farther than 1
1/2 miles from the upper trailhead. Between the hours of 10 AM and 4
PM, hikers should be out of the canyon or at Havasupai Gardens or
Bright Angel campgrounds, physical activity is discouraged. All
hikers should have adequate gear, including a wide-brimmed hat,
sunscreen, salty snacks, sufficient water, and electrolyte mix.
Doubling your calorie intake helps maintain your energy.
Hike smart.
&&
$$
Humphreys
URGENT - WEATHER MESSAGE
National Weather Service Phoenix AZ
1249 AM MST Sat Jul 5 2025
AZZ534-538-539-553>555-559-060600-
/O.NEW.KPSR.XH.A.0003.250708T1700Z-250711T0300Z/
Aguila Valley-Tonopah Desert-Gila Bend-Northwest Pinal County-
West Pinal County-Apache Junction/Gold Canyon-Sonoran Desert Natl
Monument-
Including the cities of Tonopah, Casa Grande, Sentinel, Kaka,
Wintersburg, Gila Bend, Florence, Gladden, Wickenburg, Coolidge,
Cactus Forest, Apache Junction, Aguila, Arlington, and Hassayampa
1249 AM MST Sat Jul 5 2025
...EXTREME HEAT WATCH IN EFFECT FROM TUESDAY MORNING THROUGH
THURSDAY EVENING...
* WHAT...Dangerously hot conditions possible. Afternoon temperatures
107 to 115. Major Heat Risk. Overexposure can cause heat cramps
and heat exhaustion to develop and, without intervention, can lead
to heat stroke.
* WHERE...Sonoran Desert National Monument, Aguila Valley, Tonopah
Desert, Gila Bend, Northwest Pinal County, West Pinal County, and
Apache Junction/Gold Canyon.
* WHEN...From Tuesday morning through Thursday evening.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
An Extreme Heat Watch means that a period of very hot temperatures,
even by local standards, may occur. Actions should be taken to
lessen the impact of the extreme heat.
Take extra precautions if you work or spend time outside. When
possible, reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose-fitting clothing when possible
and drink plenty of water.
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.
Public cooling shelters are available in some areas. Consult county
officials for more details.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Phoenix AZ
1249 AM MST Sat Jul 5 2025
AZZ537-540-542>544-546-548-550-551-060600-
/O.NEW.KPSR.XH.A.0003.250708T1700Z-250711T0300Z/
Northwest Valley-Buckeye/Avondale-Deer Valley-Central Phoenix-
North Phoenix/Glendale-Scottsdale/Paradise Valley-East Valley-
South Mountain/Ahwatukee-Southeast Valley/Queen Creek-
Including the cities of Tempe, Gilbert, Goodyear, Mesa, Wittmann,
Circle City, Queen Creek, Sun City West, Peoria, Paradise Valley,
Liberty, Phoenix, Cashion, Beardsley, Sun Lakes, Surprise,
Chandler, and Avondale
1249 AM MST Sat Jul 5 2025
...EXTREME HEAT WATCH IN EFFECT FROM TUESDAY MORNING THROUGH
THURSDAY EVENING...
* WHAT...Dangerously hot conditions possible. Afternoon temperatures
110 to 115. Major Heat Risk. Overexposure can cause heat cramps
and heat exhaustion to develop and, without intervention, can lead
to heat stroke.
* WHERE...The Northwest Valley of the Phoenix Metro Area, The East
Valley of the Phoenix Metro Area, Buckeye/Avondale, Deer Valley,
Central Phoenix, North Phoenix/Glendale, Scottsdale/Paradise
Valley, South Mountain/Ahwatukee, and Southeast Valley/Queen Creek.
* WHEN...From Tuesday morning through Thursday evening.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
* ADDITIONAL DETAILS...In Maricopa County, call 2-1-1 to find a free
cooling center, transportation, water, and more.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
An Extreme Heat Watch means that a period of very hot temperatures,
even by local standards, may occur. Actions should be taken to
lessen the impact of the extreme heat.
Take extra precautions if you work or spend time outside. When
possible, reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose-fitting clothing when possible
and drink plenty of water.
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.
Public cooling shelters are available in some areas. Consult county
officials for more details.
&&
$$
RW
Air Quality Alert
AZC013-080400-
Air Quality Alert
Relayed by National Weather Service Phoenix AZ
404 PM MST Thu Jul 3 2025
...OZONE HIGH POLLUTION ADVISORY FOR MARICOPA COUNTY INCLUDING THE
PHOENIX METRO AREA MONDAY THE 7TH...
The Arizona Department of Environmental Quality (ADEQ) has issued an
Ozone High Pollution Advisory for the Phoenix Metro Area on Monday.
This means that forecast weather conditions combined with existing
ozone levels are expected to result in local maximum 8-hour ozone
concentrations that pose a health risk. Adverse health effects
increase as air quality deteriorates.
Ozone is an air contaminant which can cause breathing difficulties
for children, older adults, as well as persons with respiratory
problems. A decrease in physical activity is recommended.
You are urged to car pool, telecommute or use mass transit.
The use of gasoline-powered equipment should be reduced or done late
in the day.
For details on this High Pollution Advisory, visit the ADEQ internet
site at www.azdeq.gov/forecast/phoenix or call 602-771-2300.
$$
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Grand Junction CO
244 AM MDT Sat Jul 5 2025
COZ001>014-017>023-UTZ022>025-027>029-060845-
Lower Yampa River Basin-Central Yampa River Basin-
Roan and Tavaputs Plateaus-Elkhead and Park Mountains-
Upper Yampa River Basin-Grand Valley-Debeque to Silt Corridor-
Central Colorado River Basin-Grand and Battlement Mesas-
Gore and Elk Mountains/Central Mountain Valleys-
Central Gunnison and Uncompahgre River Basin-
West Elk and Sawatch Mountains-Flat Tops-Upper Gunnison River Valley-
Uncompahgre Plateau and Dallas Divide-Northwest San Juan Mountains-
Southwest San Juan Mountains-Paradox Valley/Lower Dolores River-
Four Corners/Upper Dolores River-Animas River Basin-
San Juan River Basin-Southeast Utah-Eastern Uinta Mountains-
Eastern Uinta Basin-Tavaputs Plateau-Arches/Grand Flat-
La Sal and Abajo Mountains-Canyonlands/Natural Bridges-
244 AM MDT Sat Jul 5 2025
This Hazardous Weather Outlook is for northwest Colorado, southwest
Colorado, west central Colorado, east central Utah, northeast Utah
and southeast Utah.
.DAY ONE...Today and tonight.
High pressure building in will bring near-normal temperatures and
mostly dry conditions today.
.DAYS TWO THROUGH SEVEN...Sunday through Friday.
Temperatures gradually rise to 5-10 degrees above normal by
Wednesday, and remain there through the end of the week. A daily
chance of isolate showers or thunderstorms remains along the Divide
through the period.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected at this time.
$$
