Grand Canyon, Arizona
Regional Weather Alerts
| Alert: | Special Weather Statement |
| Area(s): | Pinal/Superstition Mountains; San Carlos |
| Effective: | 2026-08-23 @ 7:07 pm -> 2026-08-23 @ 7:30 pm |
| Onset: | 2026-08-23 @ 7:07 pm |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Phoenix AZ on 2026-08-23 @ 7:07 pm |
| Headline: | Special Weather Statement issued August 23 at 5:07PM MST by NWS Phoenix AZ |
| Description: |
At 506 PM MST, Doppler radar was tracking a strong thunderstorm near Cutter, or 11 miles southeast of Globe. This thunderstorm was nearly stationary. HAZARD...Wind gusts up to 50 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... San Carlos and Cutter. This includes AZ Route 70 between mile markers 257 and 270. |
| Alert: | Severe Thunderstorm Warning |
| Area(s): | Maricopa, AZ |
| Effective: | 2026-08-23 @ 7:05 pm -> 2026-08-23 @ 7:30 pm |
| Onset: | 2026-08-23 @ 7:05 pm -> 2026-08-23 @ 7:30 pm |
| Severity: | Severe |
| Certainty: | Observed |
| Urgency: | Immediate |
| Issued By: | NWS Phoenix AZ on 2026-08-23 @ 7:05 pm |
| Headline: | Severe Thunderstorm Warning issued August 23 at 5:05PM MST until August 23 at 5:30PM MST by NWS Phoenix AZ |
| Description: |
At 505 PM MST, a severe thunderstorm was located 10 miles southeast of Aguila, or 18 miles southwest of Wickenburg, and is nearly stationary. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. This severe thunderstorm will remain over mainly rural areas of Maricopa County. This includes US Highway 60 between mile markers 87 and 98. |
| Alert: | Severe Thunderstorm Warning |
| Area(s): | Pima, AZ |
| Effective: | 2026-08-23 @ 6:53 pm -> 2026-08-23 @ 7:45 pm |
| Onset: | 2026-08-23 @ 6:53 pm -> 2026-08-23 @ 7:45 pm |
| Severity: | Severe |
| Certainty: | Observed |
| Urgency: | Immediate |
| Issued By: | NWS Tucson AZ on 2026-08-23 @ 6:53 pm |
| Headline: | Severe Thunderstorm Warning issued August 23 at 4:53PM MST until August 23 at 5:45PM MST by NWS Tucson AZ |
| Description: |
SVRTWC The National Weather Service in Tucson has issued a * Severe Thunderstorm Warning for... East Central Pima County in southeastern Arizona... * Until 545 PM MST. * At 453 PM MST, a severe thunderstorm was located 7 miles west of Green Valley, moving west at 15 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. * Locations impacted include... Mainly rural areas of East Central Pima County. |
| Alert: | Flash Flood Warning |
| Area(s): | Apache, AZ |
| Effective: | 2026-08-23 @ 6:07 pm -> 2026-08-23 @ 7:30 pm |
| Onset: | 2026-08-23 @ 6:07 pm -> 2026-08-23 @ 7:30 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Immediate |
| Issued By: | NWS Flagstaff AZ on 2026-08-23 @ 6:07 pm |
| Headline: | Flash Flood Warning issued August 23 at 4:07PM MST until August 23 at 5:30PM MST by NWS Flagstaff AZ |
| Description: |
At 507 PM MDT, Doppler radar indicated that the heavy rain has ended over Balakai Wash. However, flash flooding remains a threat from earlier thunderstorms producing heavy rain. Between 1 and 2.25 inches of rain have fallen. Flooding impacts will continue, but no additional rainfall is expected. Flash flooding is ongoing or expected to begin shortly. HAZARD...Life threatening flash flooding. Thunderstorms producing flash flooding. SOURCE...Radar indicated. IMPACT...Life threatening flash flooding of creeks, streams, and normally dry washes. Some locations that will experience flash flooding include... Salina. This includes the following creeks, washes and rivers... Steamboat Wash, Tse Ba Ni Zi Ni Wash, Balakai Wash and Cottonwood Wash. |
| Alert: | Flash Flood Warning |
| Area(s): | Santa Cruz, AZ |
| Effective: | 2026-08-23 @ 5:40 pm -> 2026-08-23 @ 8:45 pm |
| Onset: | 2026-08-23 @ 5:40 pm -> 2026-08-23 @ 8:45 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Immediate |
| Issued By: | NWS Tucson AZ on 2026-08-23 @ 5:40 pm |
| Headline: | Flash Flood Warning issued August 23 at 3:40PM MST until August 23 at 6:45PM MST by NWS Tucson AZ |
| Description: |
FFWTWC The National Weather Service in Tucson has issued a * Flash Flood Warning for... North Central Santa Cruz County in southeastern Arizona... * Until 645 PM MST. * At 340 PM MST, An automated rain gage in Gardner Canyon reported 1.38 inches of rain in 15 minutes. Flash flooding is ongoing or expected to begin shortly, especially along Gardner Canyon Creek that impacts Gardner Canyon Road. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Gauges reported. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. * Some locations that will experience flash flooding include... Mainly rural areas of North Central Santa Cruz County. This includes Route 83 near mile marker 36. |
| Alert: | Extreme Heat Warning |
| Area(s): | Upper Santa Cruz River and Altar Valleys including Nogales; Upper San Pedro River Valley including Sierra Vista/Benson; Eastern Cochise County Below 5000 Feet including Douglas/Willcox |
| Effective: | 2026-08-23 @ 1:45 pm -> 2026-08-24 @ 7:00 am |
| Onset: | 2026-08-25 @ 12:00 pm -> 2026-08-29 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Tucson AZ on 2026-08-23 @ 1:45 pm |
| Headline: | Extreme Heat Warning issued August 23 at 11:45AM MST until August 29 at 8:00PM MST by NWS Tucson AZ |
| Description: |
* WHAT...Dangerously hot conditions with temperatures 98 to 104 degrees expected. Overnight lows 71 to 78 degrees. Major HeatRisk is expected Tuesday through Saturday with isolated Extreme HeatRisk. * WHERE...Eastern Cochise County below 5000 feet, Upper San Pedro River Valley, and Upper Santa Cruz River Valley/Altar Valley. * WHEN...From 10 AM Tuesday to 8 PM MST Saturday. * 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; Upper Gila River and Aravaipa Valleys including Clifton/Safford |
| Effective: | 2026-08-23 @ 1:45 pm -> 2026-08-24 @ 7:00 am |
| Onset: | 2026-08-23 @ 1:45 pm -> 2026-08-29 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Tucson AZ on 2026-08-23 @ 1:45 pm |
| Headline: | Extreme Heat Warning issued August 23 at 11:45AM MST until August 29 at 8:00PM MST by NWS Tucson AZ |
| Description: |
* WHAT...Dangerously hot conditions with high temperatures ranging between 103 to 111 degrees and low temperatures 79 to 85 degrees. Major HeatRisk is expected through Tuesday and then widespread Major to Extreme HeatRisk Wednesday through Saturday. * WHERE...Pinal County, Tohono O'odham Nation, Tucson Metro Area, Upper Gila River Valley, and Western Pima County. * WHEN...Until 8 PM MST Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. |
| Alert: | Extreme Heat Warning |
| Area(s): | Northwest Valley; Buckeye/Avondale; Deer Valley; Central Phoenix; North Phoenix/Glendale; Scottsdale/Paradise Valley; East Valley; South Mountain/Ahwatukee; Southeast Valley/Queen Creek |
| Effective: | 2026-08-23 @ 12:23 pm -> 2026-08-24 @ 5:00 am |
| Onset: | 2026-08-23 @ 12:23 pm -> 2026-08-29 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Phoenix AZ on 2026-08-23 @ 12:23 pm |
| Headline: | Extreme Heat Warning issued August 23 at 10:23AM MST until August 29 at 8:00PM MST by NWS Phoenix AZ |
| Description: |
* WHAT...Dangerously hot conditions. Afternoon temperatures 107 to 115 expected. Major to Extreme Heat Risk. * WHERE...The Phoenix metropolitan area. * WHEN...Until 8 PM MST Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. * ADDITIONAL DETAILS...In Maricopa County, call 2-1-1 to find a free cooling center, transportation, water and more. https://www.maricopa.gov/heat |
| Alert: | Extreme Heat Warning |
| Area(s): | San Carlos |
| Effective: | 2026-08-23 @ 12:23 pm -> 2026-08-24 @ 5:00 am |
| Onset: | 2026-08-23 @ 12:23 pm -> 2026-08-29 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Phoenix AZ on 2026-08-23 @ 12:23 pm |
| Headline: | Extreme Heat Warning issued August 23 at 10:23AM MST until August 29 at 8:00PM MST by NWS Phoenix AZ |
| Description: |
* WHAT...Dangerously hot conditions. Afternoon temperatures 104 to 113 expected. Major to Extreme Heat Risk. * WHERE...San Carlos. * WHEN...Until 8 PM MST Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. |
| Alert: | Extreme Heat Warning |
| Area(s): | Aguila Valley; Tonopah Desert; Gila Bend; Cave Creek/New River; New River Mesa; Rio Verde/Salt River; Fountain Hills/East Mesa; Superior; Northwest Pinal County; West Pinal County; Apache Junction/Gold Canyon; Sonoran Desert Natl Monument |
| Effective: | 2026-08-23 @ 12:23 pm -> 2026-08-24 @ 5:00 am |
| Onset: | 2026-08-23 @ 12:23 pm -> 2026-08-29 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Phoenix AZ on 2026-08-23 @ 12:23 pm |
| Headline: | Extreme Heat Warning issued August 23 at 10:23AM MST until August 29 at 8:00PM MST by NWS Phoenix AZ |
| Description: |
* WHAT...Dangerously hot conditions. Afternoon temperatures 105 to 116 expected. Major to Extreme Heat Risk. * WHERE...Aguila Valley, Apache Junction/Gold Canyon, Cave Creek/New River, Fountain Hills/East Mesa, Gila Bend, Northwest Pinal County, Sonoran Desert Natl Monument, Tonopah Desert, New River Mesa, Rio Verde/Salt River, and Superior. * WHEN...Until 8 PM MST Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. * ADDITIONAL DETAILS...In Maricopa County, call 2-1-1 to find a free cooling center, transportation, water and more. https://www.maricopa.gov/heat |
| 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: | 2026-08-23 @ 12:23 pm -> 2026-08-24 @ 5:00 am |
| Onset: | 2026-08-23 @ 12:23 pm -> 2026-08-29 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Phoenix AZ on 2026-08-23 @ 12:23 pm |
| Headline: | Extreme Heat Warning issued August 23 at 10:23AM MST until August 29 at 8:00PM MST by NWS Phoenix AZ |
| Description: |
* WHAT...Dangerously hot and humid conditions. Afternoon temperatures 106 to 118 expected. Major to Extreme Heat Risk. * WHERE...Portions of southwest Arizona and southeast California. * WHEN...Until 8 PM MST /8 PM PDT/ Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. |
| Alert: | Air Quality Alert |
| Area(s): | Maricopa, AZ |
| Effective: | 2026-08-23 @ 9:45 am -> 2026-08-24 @ 11:00 pm |
| Onset: | 2026-08-23 @ 9:45 am |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS Phoenix AZ on 2026-08-23 @ 9:45 am |
| Headline: | Air Quality Alert issued August 23 at 7:45AM 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 through 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. |
| Alert: | Extreme Heat Warning |
| Area(s): | Lake Havasu and Fort Mohave; Lake Mead - AZ side; Lake Mohave - AZ side; Northwest Deserts; Death Valley National Park; San Bernardino County-Upper Colorado River Valley; Las Vegas Valley; Lake Mead - NV side; Lake Mohave - NV side |
| Effective: | 2026-08-23 @ 3:44 am -> 2026-08-23 @ 10:00 pm |
| Onset: | 2026-08-23 @ 3:44 am -> 2026-08-23 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Las Vegas NV on 2026-08-23 @ 3:44 am |
| Headline: | Extreme Heat Warning issued August 23 at 1:44AM PDT until August 23 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. Near record warm low temperatures expected in urban areas. * WHERE...Lake Mohave, Lake Mead, Lower Colorado River Valley / Lake Havasu, Northwest Deserts, Death Valley National Park, and Las Vegas Valley. * WHEN...Until 8 PM PDT /8 PM MST/ this evening. * IMPACTS...Heat-related illnesses increase significantly during extreme heat events. |
| Alert: | Air Quality Alert |
| Area(s): | Maricopa, AZ |
| Effective: | 2026-08-21 @ 11:18 am -> 2026-08-23 @ 11:00 pm |
| Onset: | 2026-08-21 @ 11:18 am |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS Phoenix AZ on 2026-08-21 @ 11:18 am |
| Headline: | Air Quality Alert issued August 21 at 9:18AM 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 through Sunday. 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. |