Weather Alerts For Tucson, AZ

# HEADLINE -------------------- EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST SATURDAY # DETAILS -------------------- 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. ISSUED AT Sunday, August 23, 2026 at 11:45 AM MST ISSUED BY National Weather Service Tucson AZ HEADER URGENT - WEATHER MESSAGE # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- 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. 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. # AREAS AFFECTED -------------------- South Central Pinal County, Southeast Pinal County, Tohono O'odham Nation, Tucson Metro Area, Upper Gila River Valley, Western Pima County Including the cities of Mammoth, Clifton, Ajo, Safford, Organ Pipe Cactus N.M., Oracle, Marana, Picacho Peak State Park, Green Valley, Sells, Tucson, and Vail

There is a Marginal Severe Storm Risk for your location. Continue reading for today's outlook from the National Weather Service's Storm Prediction Center. -------------------- National Severe Storm Outlook THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE NORTHERN ROCKIES/PLAINS AND GREAT BASIN SUMMARY Thunderstorms capable of producing large hail and severe wind gusts are forecast across parts of the northern Rockies/Plains this afternoon and evening. Other thunderstorms with mainly a severe wind threat are probable over portions of the northern Great Basin. Northern Rockies/Plains and Great Basin Subtle adjustments were made to the existing Marginal/Slight risk areas based on ongoing convective trends. Recent CAM/TLE guidance suggests that upscale growth of convection into one or more linear clusters may result in localized corridors of greater damaging/severe wind coverage across portions of northern Utah and central Montana. The evolution of this scenario remains somewhat uncertain, however, which precludes the addition of 30% wind probabilities at this time. See MCDs 2099, 2100, and 2101 for additional short-term details. Coastal Carolinas Recent mesoanalysis and observational data depict modestly elongated hodographs and effective shear around 35 kts in place across portions of the Coastal Carolinas. Despite poor mid-level lapse rates, this may allow for the occurrence of isolated, marginally severe hail with the most robust updraft cores. Thus, a targeted 5% hail probability area was included with this update, which is similarly supported by AI/ML guidance and recent CAM solutions. Elsewhere, the forecast remains largely on track, with only minor adjustments made based on the latest forecast and observational trends. See the discussion below for additional details.