Phoenix, Arizona
Regional Weather Alerts
| Alert: | Extreme Heat Watch |
| 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; Upper Gila River and Aravaipa Valleys including Clifton/Safford |
| Effective: | 2026-03-16 @ 2:11 am -> 2026-03-22 @ 10:00 pm |
| Onset: | 2026-03-19 @ 1:00 pm -> 2026-03-16 @ 7:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Future |
| Issued By: | NWS Tucson AZ on 2026-03-16 @ 2:11 am |
| Headline: | Extreme Heat Watch issued March 16 at 12:11AM MST until March 22 at 8:00PM MST by NWS Tucson AZ |
| Description: |
* WHAT...Dangerously hot conditions with high temperatures 95 to 100 degrees. The hottest days are currently expected to be Friday March 20 and Saturday March 21. * WHERE...Eastern Cochise County below 5000 feet, Upper Gila River Valley, Upper San Pedro River Valley, and Upper Santa Cruz River Valley/Altar Valley. * WHEN...From Thursday morning through Sunday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Visitors, seasonal residents and other people not typically accustomed to or acclimated to extreme heat are especially urged to take precautions during the hottest hours of the day and limit outdoor activity. |
| Alert: | Extreme Heat Watch |
| 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: | 2026-03-16 @ 2:11 am -> 2026-03-22 @ 10:00 pm |
| Onset: | 2026-03-19 @ 1:00 pm -> 2026-03-16 @ 7:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Future |
| Issued By: | NWS Tucson AZ on 2026-03-16 @ 2:11 am |
| Headline: | Extreme Heat Watch issued March 16 at 12:11AM MST until March 22 at 8:00PM MST by NWS Tucson AZ |
| Description: |
* WHAT...Dangerously hot conditions with high temperatures 100 to 108 possible. The hottest days are currently expected to be Friday March 20 and Saturday March 21. * WHERE...South Central Pinal County, Southeast Pinal County, Tohono O'odham Nation, Tucson Metro Area, and Western Pima County. * WHEN...From Thursday morning through Sunday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Visitors, seasonal residents and other people not typically accustomed to or acclimated to extreme heat are especially urged to take precautions during the hottest hours of the day and limit outdoor activity. |
| Alert: | Extreme Heat Watch |
| Area(s): | Kofa; Yuma; Central La Paz; Aguila Valley; Southeast Yuma County; Gila River Valley; Northwest Valley; Tonopah Desert; Gila Bend; Buckeye/Avondale; Cave Creek/New River; Deer Valley; Central Phoenix; North Phoenix/Glendale; Scottsdale/Paradise Valley; East Valley; Fountain Hills/East Mesa; South Mountain/Ahwatukee; Southeast Valley/Queen Creek; Northwest Pinal County; West Pinal County; Apache Junction/Gold Canyon; Sonoran Desert Natl Monument |
| Effective: | 2026-03-16 @ 2:04 am -> 2026-03-22 @ 10:00 pm |
| Onset: | 2026-03-19 @ 1:00 pm -> 2026-03-16 @ 7:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Future |
| Issued By: | NWS Phoenix AZ on 2026-03-16 @ 2:04 am |
| Headline: | Extreme Heat Watch issued March 16 at 12:04AM MST until March 22 at 8:00PM MST by NWS Phoenix AZ |
| Description: |
* WHERE...Portions of south central and southwest Arizona. * WHEN...From Thursday morning through Sunday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Afternoon high temperatures between 103 and 109 degrees. |
| Alert: | Extreme Heat Watch |
| Area(s): | Parker Valley; Joshua Tree NP East; Imperial County Southwest; Salton Sea; Chuckwalla Mountains; Imperial County Southeast; Imperial County West; Imperial Valley; Chiriaco Summit; Palo Verde Valley; Chuckwalla Valley |
| Effective: | 2026-03-16 @ 2:04 am -> 2026-03-22 @ 10:00 pm |
| Onset: | 2026-03-18 @ 1:00 pm -> 2026-03-16 @ 7:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Future |
| Issued By: | NWS Phoenix AZ on 2026-03-16 @ 2:04 am |
| Headline: | Extreme Heat Watch issued March 16 at 12:04AM MST until March 22 at 8:00PM MST by NWS Phoenix AZ |
| Description: |
* WHERE...Portions of southwest Arizona and southeast and southern California. * WHEN...From Wednesday morning through Sunday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Afternoon high temperatures between 103 and 109 degrees. |
| Alert: | Lake Wind Advisory |
| Area(s): | Lake Havasu and Fort Mohave; Lake Mead National Recreation Area; San Bernardino County-Upper Colorado River Valley; Lake Mead National Recreation Area |
| Effective: | 2026-03-15 @ 3:37 pm -> 2026-03-16 @ 10:00 pm |
| Onset: | 2026-03-15 @ 3:37 pm -> 2026-03-16 @ 4:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Las Vegas NV on 2026-03-15 @ 3:37 pm |
| Headline: | Lake Wind Advisory issued March 15 at 1:37PM PDT until March 16 at 8:00PM PDT by NWS Las Vegas NV |
| Description: |
* WHAT...For the Lake Wind Advisory, north winds 15 to 25 mph with gusts up to 45 mph. For the Extreme Heat Watch, dangerously hot conditions with temperatures up to 106 possible. * WHERE...Lake Mead National Recreation Area, Lake Havasu and Fort Mohave, and San Bernardino County-Upper Colorado River Valley. * WHEN...For the Lake Wind Advisory, until 8 PM PDT /8 PM MST/ Monday. For the Extreme Heat Watch, from Wednesday morning through Friday evening. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. Heat related illnesses increase significantly during extreme heat events. |
| Alert: | Extreme Heat Watch |
| Area(s): | Northwest Deserts; Las Vegas Valley; Southern Clark County |
| Effective: | 2026-03-15 @ 3:37 pm -> 2026-03-20 @ 10:00 pm |
| Onset: | 2026-03-19 @ 1:00 pm -> 2026-03-16 @ 4:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Future |
| Issued By: | NWS Las Vegas NV on 2026-03-15 @ 3:37 pm |
| Headline: | Extreme Heat Watch issued March 15 at 1:37PM PDT until March 20 at 8:00PM PDT by NWS Las Vegas NV |
| Description: |
* WHAT...Dangerously hot conditions with temperatures up to 100 possible. * WHERE...In Arizona, Northwest Deserts. In Nevada, Las Vegas Valley and Southern Clark County. * WHEN...From Thursday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. |
| Alert: | Extreme Heat Watch |
| Area(s): | Lake Havasu and Fort Mohave; Lake Mead National Recreation Area; San Bernardino County-Upper Colorado River Valley; Lake Mead National Recreation Area |
| Effective: | 2026-03-15 @ 3:37 pm -> 2026-03-20 @ 10:00 pm |
| Onset: | 2026-03-18 @ 1:00 pm -> 2026-03-16 @ 4:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Future |
| Issued By: | NWS Las Vegas NV on 2026-03-15 @ 3:37 pm |
| Headline: | Extreme Heat Watch issued March 15 at 1:37PM PDT until March 20 at 8:00PM PDT by NWS Las Vegas NV |
| Description: |
* WHAT...For the Lake Wind Advisory, north winds 15 to 25 mph with gusts up to 45 mph. For the Extreme Heat Watch, dangerously hot conditions with temperatures up to 106 possible. * WHERE...Lake Mead National Recreation Area, Lake Havasu and Fort Mohave, and San Bernardino County-Upper Colorado River Valley. * WHEN...For the Lake Wind Advisory, until 8 PM PDT /8 PM MST/ Monday. For the Extreme Heat Watch, from Wednesday morning through Friday evening. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. Heat related illnesses increase significantly during extreme heat events. |