Severe Thunderstorm Warning Severe Thunderstorm Warning issued August 5 at 8:55PM MST until August 5 at 9:45PM MST by NWS Tucson AZ Effective 8:55 PM MST, Wed Aug 5 through 9:45 PM MST, Wed Aug 5 Seek shelter inside a well-built structure and stay away from windows. These storms are capable of producing damaging winds and large hail. https://www.weather.gov/twc/ #Thunderstorm #SevereThunderstormWarning