Central Arizona MCS Poised to Slam Hot Lowlands with 80 MPH Gusts, Haboobs — SevereWX

A loosely organized Mesoscale Convective System (MCS) is drifting south-southwestward from higher terrain into the hot lowlands of central Arizona this evening. Fueled by surface temperatures soaring above 110°F and dewpoints in the 50s°F, this storm cluster boasts 1500-2000 J/kg of DCAPE—prime ingredients for powerful downbursts.

The SPC's Mesoscale Discussion 1732 highlights the potential for multiple severe gusts exceeding 75 mph, with the most probable peak at 65-80 mph. As the MCS's cold pool interacts with the deeply mixed boundary layer, evaporative cooling could trigger explosive wind events. One or more haboobs—massive dust storms driven by outflow winds—may also form, slashing visibility and complicating travel.

Watch issuance odds stand at 60% within the next few hours, valid through around 10 PM MST. Affected areas span portions of central Arizona, per the SPC's lat/lon blocks.

This setup mirrors recent Arizona severe weather patterns but underscores the unique dangers of heat-amplified downbursts in the desert Southwest.

Stay prepared: Monitor local NWS alerts via radar and apps, secure outdoor items, avoid travel during haboobs, and have a severe weather plan ready. Check SPC's site for updates.