Phoenix Weather: Early Heat Wave Brings Record-Breaking Temperatures

Phoenix Weather: Prepare for a Scorching Week

PHOENIX (AZFamily) – Residents of Phoenix, Arizona, are preparing for an exceptionally hot week, with temperatures expected to climb 20 to 30 degrees Fahrenheit above the seasonal average. The National Weather Service has issued an Extreme Heat Warning for the Valley and surrounding areas from Thursday through Sunday, marking the earliest such warning on record. Previously, the earliest Extreme Heat Warning was issued between April 26th and 30th, 2020.

First Alert Weather Days Declared

To ensure public safety, First Alert Weather Days have been declared from Tuesday to Sunday. This proactive measure aims to provide residents with ample warning to prepare for the intense heat.

Triple-Digit Temperatures Arriving Early

Tuesday, coinciding with St. Patrick’s Day, will see temperatures reach the upper 90s. However, by Wednesday, Phoenix is likely to experience its first triple-digit day of the year, with a projected high of 102°F. The heat will intensify through the weekend, with temperatures hovering between 102°F and 106°F. This sustained heat will likely break numerous high-temperature records.

Hiking Trail Closures

Due to the extreme heat, popular hiking trails across Phoenix will be closed from 8 a.m. to 5 p.m. This includes well-known trails such as Piestewa Peak, Camelback Mountain, and sections of South Mountain. These closures are in effect to protect hikers from heat-related illnesses.

Record-Breaking Heat

Currently, Phoenix typically experiences temperatures in the upper 70s during this time of year. However, this week, even areas like Flagstaff will see temperatures nearly 30 degrees above average, reaching the 80s when they should be in the 50s. Phoenix has only reached 100°F once in March, on March 26, 1988. This week, we are poised to break that record and experience the earliest triple-digit day in Phoenix history. We are also likely to see the earliest 105°F day on record.

The Cause: A Persistent High-Pressure Ridge

The unusual heat is attributed to a strong ridge of high pressure settling over the region, creating an abnormal heat wave for March. On average, Phoenix doesn’t reach 100°F until May 2nd, and 105°F until May 22nd. This current situation is significantly ahead of schedule.

Safety Precautions

Residents are urged to take the following precautions:

Stay hydrated by drinking plenty of water.
Seek shade or air-conditioned environments during peak heat hours.
Avoid strenuous outdoor activities.
Check on vulnerable individuals, such as the elderly and those with health conditions.

For more information on heat safety, visit the National Weather Service Heat Safety page.