NWS Forecast Office Tucson, AZ

A strong ridge of high pressure over the Southern Plains today will move west into eastern Arizona Friday and near the Four Corners Saturday. As this happens, we will see a drastic increase in afternoon high temperatures across all of Southeast Arizona. For the Tucson Metro Area, we will go from a minor HeatRisk today to major HeatRisk Friday and Saturday, even flirting with and extreme HeatRisk. This is that subtle reminder to stay hydrated as we move into the weekend.