Dispersed storms will still affect parts of southeastern Arizona today and tonight, although the storm extent will continue to decrease heading into the weekend. The biggest threats are heavy rain, lightning and gusts of wind. Watch out for rainstorms!

Another warm and muggy start this morning with showers in parts of northeastern Pima County, including the Catalina Mountains. The wetness of the road surface has the biggest impact on this morning’s commute. Please allow extra time.

Thunderstorms are possible as early as this afternoon, but more severe thunderstorms are likely this evening and later tonight, mainly south and east of Tucson, including Cochise and Santa Cruz counties. Impacts include heavy rain, wind gust damage, flying dust, and lightning strikes.

Storms will subside and temperatures will rise in most areas this weekend as high pressure moves overhead. Another Excessive Heat Warning is in effect from 6 a.m. Saturday to 11 p.m. Monday. Temperatures in southeastern Arizona range from 105°C to 113°C. The alert includes all of Pima, Pinal, Santa Cruz, Cochise, Graham and Greenlee counties, but not the Isles of Skye. Drink plenty of water, check your door before locking it, and remember to limit your time outdoors to between 10am and 8pm.

Towards early next week, a high pressure system will reach the Four Corners region and intensify the monsoon storm. Temperatures will drop, but temperatures are expected to rise to the low 100s over the next few days. Today will be the 28th consecutive day with a maximum temperature of over 100 degrees Celsius. The longest streak in history is his 39 days set in 1987, 2005 and 2013. I will update this record towards the second half of work next week, so please look forward to it.

• Today: Few PM storms (30%). High: 106°
• Tonight: A bit of a storm tonight, then partly cloudy (30%). Low: 80°
• Tomorrow: Hot isolated PM storm (20%). High: 109°