Grand Canyon National Park, Arizona
Regional Weather Alerts
| Alert: | Flood Advisory |
| Area(s): | Gila, AZ |
| Effective: | 2026-08-20 @ 1:24 am -> 2026-08-20 @ 1:34 am |
| Onset: | 2026-08-20 @ 1:24 am -> 2026-08-20 @ 1:30 am |
| Severity: | Minor |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Phoenix AZ on 2026-08-20 @ 1:24 am |
| Headline: | Flood Advisory issued August 19 at 11:24PM MST until August 19 at 11:30PM MST by NWS Phoenix AZ |
| Description: |
The Flood Advisory will expire at 1130 PM MST this evening for a portion of east central Arizona, including the following area, Gila. The heavy rain has ended. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. |
| Alert: | Dust Advisory |
| Area(s): | Maricopa, AZ; Pinal, AZ |
| Effective: | 2026-08-20 @ 1:01 am -> 2026-08-20 @ 2:00 am |
| Onset: | 2026-08-20 @ 1:01 am -> 2026-08-20 @ 2:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Phoenix AZ on 2026-08-20 @ 1:01 am |
| Headline: | Dust Advisory issued August 19 at 11:01PM MST until August 20 at 12:00AM MST by NWS Phoenix AZ |
| Description: |
The National Weather Service in Phoenix has issued a * Dust Advisory for... Maricopa County in south central Arizona... Pinal County in southeastern Arizona... * Until midnight MST. * At 1101 PM MST, a dust channel was near Bosque, or 11 miles east of Gila Bend, moving west at 25 mph. HAZARD...Less than two miles visibility with strong wind in excess of 50 mph. SOURCE...Doppler radar. IMPACT...Hazardous travel. * This includes the following highways... AZ Interstate 8 between mile markers 90 and 140. AZ Route 238 between mile markers 1 and 22. AZ Route 85 between mile markers 1 and 137. Locations impacted include... Gila Bend, Estrella, Big Horn, Gila Bend Auxiliary Field, Bosque, Cotton Center, Sonoran National Monument, and Sundad. |
| Alert: | Dust Storm Warning |
| Area(s): | Maricopa, AZ |
| Effective: | 2026-08-20 @ 12:59 am -> 2026-08-20 @ 2:00 am |
| Onset: | 2026-08-20 @ 12:59 am -> 2026-08-20 @ 2:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Phoenix AZ on 2026-08-20 @ 12:59 am |
| Headline: | Dust Storm Warning issued August 19 at 10:59PM MST until August 20 at 12:00AM MST by NWS Phoenix AZ |
| Description: |
The National Weather Service in Phoenix has issued a * Dust Storm Warning for... Maricopa County in south central Arizona... * Until midnight MST. * At 1059 PM MST, a dust channel was near Buckeye, moving west at 30 mph. HAZARD...Less than a quarter mile visibility with strong wind in excess of 50 mph. SOURCE...Doppler radar. IMPACT...Dangerous life-threatening travel. * This includes the following highways... AZ Interstate 10 between mile markers 81 and 126. AZ Route 85 between mile markers 138 and 154. AZ Route 303 between mile markers 105 and 111. Locations impacted include... Goodyear, Buckeye, Tonopah, Palo Verde, Perryville, White Tank Mountain Park, Liberty, Painted Rock Dam, Palo Verde Nuclear Generation Station, Wintersburg, Estrella Mountain Ranch, Hassayampa, and Arlington. |
| Alert: | Special Weather Statement |
| Area(s): | Aguila Valley; Northwest Valley; Tonopah Desert; Buckeye/Avondale; Cave Creek/New River; Deer Valley; North Phoenix/Glendale; New River Mesa; Rio Verde/Salt River; Mazatzal Mountains |
| Effective: | 2026-08-20 @ 12:29 am -> 2026-08-20 @ 1:30 am |
| Onset: | 2026-08-20 @ 12:29 am |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Phoenix AZ on 2026-08-20 @ 12:29 am |
| Headline: | Special Weather Statement issued August 19 at 10:29PM MST by NWS Phoenix AZ |
| Description: |
At 1028 PM MST, Doppler radar was tracking an outflow boundary near New River, moving northwest at 35 mph. HAZARD...Wind gusts up to 55 mph and pea size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Locations impacted include... Phoenix, Glendale, Scottsdale, Peoria, Surprise, Goodyear, Buckeye, El Mirage, Youngtown, New River, Sun City West, Waddell, Circle City, Sun City, Wittmann, Litchfield Park, Cave Creek, Carefree, Deer Valley Airport, and White Tank Mountain Park. This includes the following highways... AZ Interstate 10 between mile markers 116 and 125. AZ Interstate 17 between mile markers 212 and 241. US Highway 60 between mile markers 120 and 152. |
| Alert: | Flood Advisory |
| Area(s): | Pima, AZ |
| Effective: | 2026-08-20 @ 12:18 am -> 2026-08-20 @ 3:15 am |
| Onset: | 2026-08-20 @ 12:18 am -> 2026-08-20 @ 3:15 am |
| Severity: | Minor |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Tucson AZ on 2026-08-20 @ 12:18 am |
| Headline: | Flood Advisory issued August 19 at 10:18PM MST until August 20 at 1:15AM MST by NWS Tucson AZ |
| Description: |
* WHAT...Small stream flooding of normally dry washes caused by excessive rainfall is expected to continue. * WHERE...Southern Pima County in southeastern Arizona... * WHEN...Until 115 AM MST. * IMPACTS...Minor flooding in low-lying and poor drainage areas. * ADDITIONAL DETAILS... - At 1018 PM MST, Doppler radar indicated 1 to 2.5 inches of heavy rain has fallen this evening along and west of the Baboquivari Mountains. Minor small stream flooding of the normally dry washes, roadway dips and other low-lying areas that drain from this area will persist into the early morning hours. This flooding will especially impact Route 19 or San Miguel Road south of Topawa. - Some locations that will experience flooding include... Topawa, Vamori, South Komelik and Coldfields. - This includes the following Flash Flood Prone Locations... Indian Route 19 south of Topawa. - http://www.weather.gov/safety/flood |
| Alert: | Flood Advisory |
| Area(s): | Pinal, AZ |
| Effective: | 2026-08-20 @ 12:11 am -> 2026-08-20 @ 3:15 am |
| Onset: | 2026-08-20 @ 12:11 am -> 2026-08-20 @ 3:15 am |
| Severity: | Minor |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Phoenix AZ on 2026-08-20 @ 12:11 am |
| Headline: | Flood Advisory issued August 19 at 10:11PM MST until August 20 at 1:15AM MST by NWS Phoenix AZ |
| Description: |
* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Pinal County in southeastern Arizona... * WHEN...Until 115 AM MST. * IMPACTS...Minor flooding in low-lying and poor drainage areas. * ADDITIONAL DETAILS... - At 1011 PM MST, A trained weather spotter reported 0.71 inches of rain in 30 minutes in the advisory area. Minor flooding is ongoing or expected to begin shortly. Between 0.5 and 1.5 inches of rain have fallen. - Additional rainfall amounts of 0.5 to 1 inch are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include... Florence, Coolidge, Queen Creek, Magma, San Tan Valley and San Tan Mountain Park. - http://www.weather.gov/safety/flood |
| Alert: | Extreme Heat Warning |
| Area(s): | Upper Gila River and Aravaipa Valleys including Clifton/Safford |
| Effective: | 2026-08-19 @ 11:51 pm -> 2026-08-20 @ 7:00 pm |
| Onset: | 2026-08-19 @ 11:51 pm -> 2026-08-21 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Tucson AZ on 2026-08-19 @ 11:51 pm |
| Headline: | Extreme Heat Warning issued August 19 at 9:51PM MST until August 21 at 8:00PM MST by NWS Tucson AZ |
| Description: |
* WHAT...Dangerously hot conditions with high temperatures ranging between 103 to 107 degrees and low temperatures 75 to 81 degrees. Major HeatRisk is expected. * WHERE...Portions of Graham and southern Greenlee counties including the Upper Gila River Valley. * WHEN...Until 8 PM MST Friday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. |
| Alert: | Extreme Heat Warning |
| Area(s): | Western Pima County Including Ajo/Organ Pipe Cactus National Monument; Tohono O'odham Nation including Sells; Tucson Metro Area including Tucson/Green Valley/Marana/Vail; South Central Pinal County including Eloy/Picacho Peak State Park; Southeast Pinal County including Kearny/Mammoth/Oracle |
| Effective: | 2026-08-19 @ 11:51 pm -> 2026-08-20 @ 7:00 pm |
| Onset: | 2026-08-19 @ 11:51 pm -> 2026-08-21 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Tucson AZ on 2026-08-19 @ 11:51 pm |
| Headline: | Extreme Heat Warning issued August 19 at 9:51PM MST until August 21 at 8:00PM MST by NWS Tucson AZ |
| Description: |
* WHAT...Dangerously hot conditions with high temperatures ranging between 103 to 110 degrees and low temperatures 79 to 85 degrees. Major HeatRisk is expected. * WHERE...Pinal County, Tohono O'odham Nation, Tucson Metro Area, and Western Pima County. * WHEN...Until 8 PM MST Friday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. |
| Alert: | Flash Flood Warning |
| Area(s): | Pinal, AZ |
| Effective: | 2026-08-19 @ 11:29 pm -> 2026-08-20 @ 2:30 am |
| Onset: | 2026-08-19 @ 11:29 pm -> 2026-08-20 @ 2:30 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Immediate |
| Issued By: | NWS Phoenix AZ on 2026-08-19 @ 11:29 pm |
| Headline: | Flash Flood Warning issued August 19 at 9:29PM MST until August 20 at 12:30AM MST by NWS Phoenix AZ |
| Description: |
FFWPSR The National Weather Service in Phoenix has issued a * Flash Flood Warning for... Pinal County in southeastern Arizona... * Until 1230 AM MST. * At 929 PM MST, Doppler radar and automated rain gauges indicated thunderstorms producing heavy rain across the warned area. Between 1 and 1.5 inches of rain have fallen. Additional rainfall amounts of 0.5 to 1 inch are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Life threatening flash flooding. Thunderstorms producing flash flooding. SOURCE...Radar and automated gauges. IMPACT...Life threatening flash flooding of creeks and streams, urban areas, highways, streets and underpasses. * Some locations that will experience flash flooding include... Florence. |
| Alert: | Special Weather Statement |
| Area(s): | Northwest Valley; Tonopah Desert; Buckeye/Avondale; Cave Creek/New River; Deer Valley; Central Phoenix; North Phoenix/Glendale; New River Mesa; Scottsdale/Paradise Valley; Rio Verde/Salt River; East Valley; Fountain Hills/East Mesa; South Mountain/Ahwatukee; Southeast Valley/Queen Creek; Superior; Northwest Pinal County; West Pinal County; Apache Junction/Gold Canyon; Tonto Basin; Mazatzal Mountains; Pinal/Superstition Mountains; Sonoran Desert Natl Monument; Globe/Miami |
| Effective: | 2026-08-19 @ 10:23 pm -> 2026-08-20 @ 1:30 am |
| Onset: | 2026-08-19 @ 10:23 pm |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Phoenix AZ on 2026-08-19 @ 10:23 pm |
| Headline: | Special Weather Statement issued August 19 at 8:23PM MST by NWS Phoenix AZ |
| Description: |
At 823 PM MST, radar indicated strong thunderstorms were located near Randolph, or near Coolidge, moving northwest at 25 mph. Conditions are becoming more favorable for the development of additional thunderstorms. Some storms may become strong to severe. Winds in excess of 40 mph and pea size hail will be possible. Strong, gusty winds will be capable of producing areas of blowing dust with reduced visibilities. Locations impacted include... Phoenix, Mesa, Chandler, Glendale, Scottsdale, Gilbert, Tempe, Peoria, Surprise, Avondale, Goodyear, Buckeye, Casa Grande, Apache Junction, El Mirage, Florence, Fountain Hills, Paradise Valley, Coolidge, and Tolleson. This includes the following highways... AZ Interstate 10 between mile markers 106 and 204. AZ Interstate 17 between mile markers 195 and 220. AZ Interstate 8 between mile markers 148 and 178. If outdoors, consider seeking shelter inside a building. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. |
| Alert: | Extreme Heat Warning |
| Area(s): | Buckeye/Avondale; South Mountain/Ahwatukee; Southeast Valley/Queen Creek |
| Effective: | 2026-08-19 @ 12:49 pm -> 2026-08-20 @ 7:00 am |
| Onset: | 2026-08-19 @ 12:49 pm -> 2026-08-23 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Phoenix AZ on 2026-08-19 @ 12:49 pm |
| Headline: | Extreme Heat Warning issued August 19 at 10:49AM MST until August 23 at 8:00PM MST by NWS Phoenix AZ |
| Description: |
* WHAT...For the Extreme Heat Warning, dangerously hot conditions. Afternoon temperatures 109 to 112. Major Heat Risk. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. For the Blowing Dust Advisory, visibility between one-quarter and one mile in blowing dust expected. * WHERE...Buckeye/Avondale, South Mountain/Ahwatukee, and Southeast Valley/Queen Creek. * WHEN...For the Extreme Heat Warning, until 8 PM MST Sunday. For the Blowing Dust Advisory, from 5 PM this afternoon to 10 PM MST this evening. * IMPACTS...Hazardous driving conditions due to reduced visibility. Heat related illnesses increase significantly during extreme heat events. |
| Alert: | Extreme Heat Warning |
| Area(s): | Parker Valley; Kofa; Yuma; Central La Paz; Southeast Yuma County; Gila River Valley; Imperial County Southwest; Imperial County Southeast; Imperial County West; Imperial Valley; Palo Verde Valley; Chuckwalla Valley |
| Effective: | 2026-08-19 @ 12:49 pm -> 2026-08-20 @ 7:00 am |
| Onset: | 2026-08-19 @ 12:49 pm -> 2026-08-23 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Phoenix AZ on 2026-08-19 @ 12:49 pm |
| Headline: | Extreme Heat Warning issued August 19 at 10:49AM MST until August 23 at 8:00PM MST by NWS Phoenix AZ |
| Description: |
* WHAT...Dangerously hot conditions. Afternoon temperatures 106 to 114. Major Heat Risk. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. * WHERE...Portions of southwest Arizona and southeast California. * WHEN...Until 8 PM MST /8 PM PDT/ Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. |
| Alert: | Extreme Heat Warning |
| Area(s): | Tonopah Desert; Gila Bend; Northwest Pinal County; West Pinal County; Sonoran Desert Natl Monument |
| Effective: | 2026-08-19 @ 12:49 pm -> 2026-08-20 @ 7:00 am |
| Onset: | 2026-08-19 @ 12:49 pm -> 2026-08-23 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Phoenix AZ on 2026-08-19 @ 12:49 pm |
| Headline: | Extreme Heat Warning issued August 19 at 10:49AM MST until August 23 at 8:00PM MST by NWS Phoenix AZ |
| Description: |
* WHAT...For the Extreme Heat Warning, dangerously hot conditions. Afternoon temperatures 106 to 114. Major Heat Risk. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. For the Blowing Dust Advisory, visibility between one-quarter and one mile in blowing dust expected. * WHERE...Gila Bend, Northwest Pinal County, Sonoran Desert Natl Monument, Tonopah Desert, and West Pinal County. * WHEN...For the Extreme Heat Warning, until 8 PM MST Sunday. For the Blowing Dust Advisory, from 5 PM this afternoon to 10 PM MST this evening. * IMPACTS...Hazardous driving conditions due to reduced visibility. Heat related illnesses increase significantly during extreme heat events. |
| Alert: | Extreme Heat Warning |
| Area(s): | San Carlos |
| Effective: | 2026-08-19 @ 12:49 pm -> 2026-08-20 @ 7:00 am |
| Onset: | 2026-08-19 @ 12:49 pm -> 2026-08-23 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Phoenix AZ on 2026-08-19 @ 12:49 pm |
| Headline: | Extreme Heat Warning issued August 19 at 10:49AM MST until August 23 at 8:00PM MST by NWS Phoenix AZ |
| Description: |
* WHAT...Dangerously hot conditions. Afternoon temperatures 102 to 109. Extreme Heat Risk. Increase in heat related illnesses, including heat cramps, heat exhaustion, and heat stroke. Heat stroke can lead to death. * WHERE...San Carlos. * WHEN...Until 8 PM MST Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. |
| Alert: | Extreme Heat Warning |
| Area(s): | Aguila Valley; Cave Creek/New River; Fountain Hills/East Mesa; Apache Junction/Gold Canyon |
| Effective: | 2026-08-19 @ 12:49 pm -> 2026-08-20 @ 7:00 am |
| Onset: | 2026-08-19 @ 12:49 pm -> 2026-08-23 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Phoenix AZ on 2026-08-19 @ 12:49 pm |
| Headline: | Extreme Heat Warning issued August 19 at 10:49AM MST until August 23 at 8:00PM MST by NWS Phoenix AZ |
| Description: |
* WHAT...Dangerously hot conditions. Afternoon temperatures 103 to 111. Major Heat Risk. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. * WHERE...Aguila Valley, Apache Junction/Gold Canyon, Cave Creek/New River, and Fountain Hills/East Mesa. * WHEN...Until 8 PM MST Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. |
| Alert: | Extreme Heat Warning |
| Area(s): | Northwest Valley; Deer Valley; Central Phoenix; North Phoenix/Glendale; Scottsdale/Paradise Valley; East Valley |
| Effective: | 2026-08-19 @ 12:49 pm -> 2026-08-20 @ 7:00 am |
| Onset: | 2026-08-19 @ 12:49 pm -> 2026-08-23 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Phoenix AZ on 2026-08-19 @ 12:49 pm |
| Headline: | Extreme Heat Warning issued August 19 at 10:49AM MST until August 23 at 8:00PM MST by NWS Phoenix AZ |
| Description: |
* WHAT...Dangerously hot conditions. Afternoon temperatures 108 to 111. Major Heat Risk. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. * WHERE...Central Phoenix, Deer Valley, East Valley, North Phoenix/Glendale, Northwest Valley, and Scottsdale/Paradise Valley. * WHEN...Until 8 PM MST Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. |
| Alert: | Air Quality Alert |
| Area(s): | Pinal, AZ |
| Effective: | 2026-08-19 @ 11:47 am -> 2026-08-20 @ 11:00 pm |
| Onset: | 2026-08-19 @ 11:47 am |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS Phoenix AZ on 2026-08-19 @ 11:47 am |
| Headline: | Air Quality Alert issued August 19 at 9:47AM MST by NWS Phoenix AZ |
| Description: |
AQAPSR The Arizona Department of Environmental Quality (ADEQ) has issued a PM-10 High Pollution Advisory for Pinal County Today and Thursday. An episode of strong and gusty winds is forecast to generate widespread blowing dust that may result in local PM-10 concentrations that pose a health risk. Adverse health effects increase as air quality deteriorates. Coarse particulate matter - also known as PM-10 - is an air contaminant that can aggravate heart and lung disease conditions, especially in older adults, children, and those with asthma. A decrease in physical activity is recommended. Consolidate your travel, stabilize loose soils, slow down or avoid travel on dirt roads, reduce or eliminate fireplace use, and avoid using gas-powered lawn equipment. For details on this High Pollution Advisory, visit the ADEQ internet site at www.azdeq.gov/forecast/WestPinal or call 602-771-2300. |
| Alert: | Air Quality Alert |
| Area(s): | Maricopa, AZ |
| Effective: | 2026-08-19 @ 11:45 am -> 2026-08-20 @ 11:00 pm |
| Onset: | 2026-08-19 @ 11:45 am |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS Phoenix AZ on 2026-08-19 @ 11:45 am |
| Headline: | Air Quality Alert issued August 19 at 9:45AM MST by NWS Phoenix AZ |
| Description: |
AQAPSR The Arizona Department of Environmental Quality (ADEQ) has issued an Ozone High Pollution Advisory for the Phoenix Metro Area Today and Thursday. 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. |
| Alert: | Extreme Heat Warning |
| Area(s): | Lake Havasu and Fort Mohave; Lake Mead - AZ side; Lake Mohave - AZ side; Hualapai Mountains; Northwest Deserts; Death Valley National Park; Eastern Mojave Desert, Including the Mojave National Preserve; Morongo Basin; Cadiz Basin; San Bernardino County-Upper Colorado River Valley; Northeast Clark County; Western Clark and Southern Nye County; Las Vegas Valley; Southern Clark County; Lake Mead - NV side; Lake Mohave - NV side |
| Effective: | 2026-08-19 @ 6:11 am -> 2026-08-20 @ 7:00 am |
| Onset: | 2026-08-19 @ 6:11 am -> 2026-08-21 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Las Vegas NV on 2026-08-19 @ 6:11 am |
| Headline: | Extreme Heat Warning issued August 19 at 4:11AM PDT until August 21 at 8:00PM PDT by NWS Las Vegas NV |
| Description: |
* WHAT...Dangerously hot conditions with temperatures up to 115 to 118 degrees expected through Death Valley and the lower Colorado River Valley, with highs between 107 to 110 degrees elsewhere. * WHERE...Portions of northwest Arizona, southeast California, and southern Nevada. * WHEN...Until 8 PM PDT /8 PM MST/ Friday. * IMPACTS...Heat-related illnesses increase significantly during extreme heat events. |
| Alert: | Extreme Heat Warning |
| Area(s): | Grand Canyon Country |
| Effective: | 2026-08-18 @ 3:40 pm -> 2026-08-20 @ 10:00 pm |
| Onset: | 2026-08-18 @ 3:40 pm -> 2026-08-20 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Flagstaff AZ on 2026-08-18 @ 3:40 pm |
| Headline: | Extreme Heat Warning issued August 18 at 1:40PM MST until August 20 at 8:00PM MST by NWS Flagstaff AZ |
| Description: |
* WHAT...Dangerously hot conditions expected below 4000 feet, with daytime temperatures ranging from 96 to 102 degrees at Havasupai Gardens, and 107 to 111 degrees at Phantom Ranch. * WHERE...Lower elevations of the Grand Canyon. * WHEN...Until 8 PM MST Thursday. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. |