Muggy weather will continue Wednesday throughout Riverside County and thunderstorms will be possible in the mountains and the San Gorgonio Pass near Banning.

A high pressure system lingering over the southwest will cause hot and humid weather to remain in Riverside County until Friday, according to the National Weather Service.

The NWS issued a heat advisory that will last from 11 a.m. to 6 p.m. Wednesday in the Riverside metropolitan area, where temperatures could reach 105 degrees.

Thunderstorms will be possible Wednesday afternoon in the county mountains and the San Gorgonio Pass near Banning, but no thunderstorm activity is expected in the Coachella Valley, forecasters said.

The chance of measurable precipitation is 30 percent Wednesday in the mountains and 20 percent in the San Gorgonio Pass.

Thunderstorms will be possible in those two areas as well as the Riverside metropolitan area and the Coachella Valley Thursday afternoon, forecasters said.

High temperatures Wednesday could reach 111 in the Coachella Valley and the San Gorgonio Pass near Banning, 102 degrees in Riverside, 96 in Temecula and 104 in Hemet.

The NWS advised that those who work outdoors should avoid the midday sun, wear light, loose-fitting clothing and drink plenty of water.

Cooling centers are open daily across the county, providing residents who do not live in climate-controlled environments a free, cool space to relax until the evening hours.

A complete list of cooling centers is available at www.capriverside.org/Portals/0/PDF/Cool/2019_Cool_Center_Directory_7_10 _2019.pdf.

A trough of low pressure will make its way inland across northern California on Friday, then move south on Saturday and Sunday, bringing drier conditions and a drop in temperatures over the weekend, forecasters said.

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