Grand Canyon National Park, Arizona
Regional Weather Alerts
| Alert: | Flood Advisory |
| Area(s): | Pima, AZ |
| Effective: | 2026-08-11 @ 8:02 am -> 2026-08-11 @ 10:00 am |
| Onset: | 2026-08-11 @ 8:02 am -> 2026-08-11 @ 10:00 am |
| Severity: | Minor |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Tucson AZ on 2026-08-11 @ 8:02 am |
| Headline: | Flood Advisory issued August 11 at 6:02AM MST until August 11 at 8:00AM MST by NWS Tucson AZ |
| Description: |
* WHAT...Small stream flooding caused by excessive rainfall is expected. * WHERE...West Central Pima County in southeastern Arizona... * WHEN...Until 800 AM MST. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Rises in small streams and normally dry washes. * ADDITIONAL DETAILS... - At 601 AM MST, Doppler radar indicated heavy rain due to thunderstorms between Ajo and Organ Pipe Cactus National Monument. This will cause small stream flooding. Up to 1 inch of rain has fallen. - Some locations that will experience flooding include... Organ Pipe Cactus National Monument, Why and Gunsight. - This includes the following highways... Route 85 between mile markers 54 and 68. Route 86 between mile markers 54 and 58. This includes the following Flash Flood Prone Locations... Gunsight Wash in Gunsight. - http://www.weather.gov/safety/flood |
| Alert: | Flood Advisory |
| Area(s): | Mohave, AZ |
| Effective: | 2026-08-11 @ 7:35 am -> 2026-08-11 @ 9:45 am |
| Onset: | 2026-08-11 @ 7:35 am -> 2026-08-11 @ 9:45 am |
| Severity: | Minor |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Las Vegas NV on 2026-08-11 @ 7:35 am |
| Headline: | Flood Advisory issued August 11 at 5:35AM PDT until August 11 at 7:45AM PDT by NWS Las Vegas NV |
| Description: |
* WHAT...Flooding caused by excessive rainfall continues. * WHERE...South Central Mohave County in northwestern Arizona... * WHEN...Until 745 AM MST. * IMPACTS...Minor flooding in low-lying and poor drainage areas. * ADDITIONAL DETAILS... - At 535 AM MST, Thunderstorms are ongoing across southern Mohave County. A rain gage near Burro Creek reported 1.26 inches of rain in the past hour, and other sites along the southern Hualapai range have picked up between 0.25 and 0.50 inches. Minor flooding remains possible across the area this morning. - Some locations that will experience flooding include... Wikieup, Alamo Lake and Burro Creek Campground. - http://www.weather.gov/safety/flood |
| Alert: | Flood Watch |
| Area(s): | Upper Santa Cruz River and Altar Valleys including Nogales; Tucson Metro Area including Tucson/Green Valley/Marana/Vail; Upper San Pedro River Valley including Sierra Vista/Benson; Eastern Cochise County Below 5000 Feet including Douglas/Willcox; Upper Gila River and Aravaipa Valleys including Clifton/Safford; Galiuro and Pinaleno Mountains including Mount Graham; Chiricahua Mountains including Chiricahua National Monument; Dragoon/Mule/Huachuca and Santa Rita Mountains including Bisbee/Canelo Hills/Madera Canyon; Santa Catalina and Rincon Mountains including Mount Lemmon/Summerhaven |
| Effective: | 2026-08-11 @ 4:59 am -> 2026-08-11 @ 7:00 pm |
| Onset: | 2026-08-11 @ 4:00 pm -> 2026-08-12 @ 1:00 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Tucson AZ on 2026-08-11 @ 4:59 am |
| Headline: | Flood Watch issued August 11 at 2:59AM MST until August 11 at 11:00PM MST by NWS Tucson AZ |
| Description: |
* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of Southeast Arizona, including the following areas, Catalina and Rincon Mountains, Chiricahua Mountains, Dragoon and Mule and Huachuca and Santa Rita Mountains, Eastern Cochise County below 5000 feet, Galiuro and Pinaleno Mountains, Tucson Metro Area, Upper Gila River Valley, Upper San Pedro River Valley and Upper Santa Cruz River Valley/Altar Valley. * WHEN...From 2 PM MST this afternoon through this evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. Low-water crossings may be flooded. Creeks and streams may rise out of their banks. * ADDITIONAL DETAILS... - Scattered to numerous thunderstorms are expected this afternoon into this evening. Rainfall rates in excess of 1 inch per hour are expected with the stronger storms with isolated areas having the potential of 2 inches or more in an hour. - http://www.weather.gov/safety/flood |
| Alert: | Air Quality Alert |
| Area(s): | Maricopa, AZ |
| Effective: | 2026-08-10 @ 11:56 am -> 2026-08-11 @ 11:00 pm |
| Onset: | 2026-08-10 @ 11:56 am |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS Phoenix AZ on 2026-08-10 @ 11:56 am |
| Headline: | Air Quality Alert issued August 10 at 9:56AM 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 through Tuesday. 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. |