Triple-digit temperatures are gripping the Inland Empire through Tuesday, with monsoonal moisture and the potential for thunderstorms in the eastern Coachella Valley and mountains, according to the National Weather Service.
A Heat Advisory is in effect for most of the region until 8 p.m. Tuesday, based on predictions of afternoon temperatures soaring to 105 degrees in the Riverside metropolitan area, San Bernardino and surrounding locations.
“Drink plenty of fluids, stay in an air-conditioned room (and) stay out of the sun,” the NWS said. “Young children and pets should never be left unattended in vehicles.”
The scorching heat arrived at the end of last week and is expected to remain intense until a ridge of high pressure is displaced by a low pressure trough Wednesday.
“Temperatures Monday are running up to eight degrees warmer than Sunday,” the Weather Service stated.
Forecasters said moisture being pulled in from the south, combined with convective instability, will likely result in another round of scattered thunderstorms, possibly Tuesday afternoon and evening, similar to the middle of last week. However, most of the heavy weather will be east of the San Bernardino Mountains and San Gorgonio Pass, meteorologists said.
“While brief heavy downpours could occur, mainly in the mountains, the more likely hazards are lightning and strong gusty winds,” according to the NWS.
The daytime mercury is predicted to settle back into the low to mid 90s after Wednesday in the Riverside metro area, with lows in the upper 60s.
In the Coachella Valley, high temps will hover around 110 going into Wednesday, with slight cooling by the weekend, and lows in the upper 70s.
In the Temecula Valley, the highs will peak in the mid 90s until midweek, after which temps will return to seasonal norms in the mid 80s, with lows in the low 60s, according to the Weather Service.