Heat, hu­mid­ity and maybe thun­der­storms

High-pres­sure sys­tem could make the week un­com­fort­able around South­ern Cal­i­for­nia.

Los Angeles Times - - CITY & STATE - By Veronica Rocha veronica.rocha @la­times.com

Scorch­ing heat, muggy con­di­tions and the pos­si­bil­ity of thun­der­storms will re­turn to South­ern Cal­i­for­nia, mak­ing this week sticky and un­com­fort­able.

With triple-digit tem­per­a­tures on the fore­cast for much of the in­te­rior val­leys, moun­tains and deserts, the Na­tional Weather Ser­vice is­sued an ex­ces­sive heat warn­ing Mon­day. Tem­per­a­tures could reach 109 de­grees in the An­te­lope Val­ley and 106 in the val­leys.

“High tem­per­a­tures will [be] quite high ... with some heat risk is­sues ... Tues­day,” me­te­o­rol­o­gist Curt Ka­plan said in a weather state­ment. “Over­all, ex­pect hu­mid and hot con­di­tions to con­tinue through much of the week. There will be lit­tle re­lief from the heat overnight away from the coast through much of the week.”

An up­per-level high­pres­sure sys­tem and weak northerly winds can be blamed for the in­tense heat, the weather ser­vice said.

If the heat weren’t enough to ac­ti­vate sweat glands, fore­cast­ers says, a mon­soonal flow pat­tern will bring hu­mid con­di­tions and a slight chance of thun­der­storms by Tues­day.

Thun­der­storms could rock the San Gabriel and Santa Bar­bara County moun­tains and bring flash flood­ing to the ar­eas.

In some ar­eas, the in­creas­ing cloud cover will be de­ceiv­ing be­cause the “in­creased hu­mid­ity will still lead to sig­nif­i­cant dis­com­fort.”

The muggy con­di­tions “will likely cause in­creased risk of heat-re­lated ill­ness,” the weather ser­vice said.

Ir­fan Khan Los An­ge­les Times

OMAR LOPEZ, 10, plays in a foun­tain on a swel­ter­ing day in Cathe­dral City, Calif., where the tem­per­a­ture re­cently reached 118 de­grees. The Na­tional Weather Ser­vice is­sued an ex­ces­sive heat warn­ing Mon­day.

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