textproduct: San Diego

SYNOPSIS

The cooling trend will continue through Sunday with high temperatures on Sunday as much as 15 to 20 degrees below average for the mountains and valleys. There will be stronger and gusty southwest to west for the mountains and deserts each afternoon and evening through Sunday with gusts to 30 to 40 mph and with gusts to 65 to 75 mph for the northern Coachella Valley below the San Gorgonio Pass. The marine layer will slowly deepen with night and morning coastal low clouds extending onto the coastal slopes of the mountains by Sunday. It will be gradually warmer next week, but with high temperatures through Thursday remaining below average, as much as 5 to 10 degrees below average on Thursday for the mountains and Inland Empire.

SHORT TERM (Today through Sunday)

Onshore flow will strengthen through Saturday with the cooling trend continuing through Sunday. High temperatures on Sunday will be as much as 15 to 20 degrees below average for the mountains and Inland Empire. High temperatures on Sunday will range from the mid 60s to lower 70s near the coast to the 70s for the Inland Empire with the 90s for the lower deserts.

The marine layer will deepen to around 4000 feet on Sunday with night and morning coastal low clouds extending well inland and onto the coastal slopes of the mountains.

With the stronger onshore flow, there will be stronger and gusty southwest to west winds for the mountains and deserts each afternoon and evening. The strongest winds are expected on Saturday with gusts to 30 to 40 mph and with gusts in the northern Coachella Valley below the San Gorgonio Pass to 75 mph.

LONG TERM (Monday through Thursday)

There will be a gradual warming trend for Monday through Thursday. High temperatures on Monday will be a few to around 5 degrees warmer than Sunday with not much change on Tuesday. Wednesday will be a few degrees warmer as will Thursday. Even with the warming, high temperatures on Thursday will still be as much as 5 to 10 degrees below average for the mountains and valleys. High temperatures on Thursday will range from the mid 60s to lower 70s near the coast to the upper 70s to mid 80s for the Inland Empire with the upper 90s to 102 for the lower deserts.

The marine layer will slowly decrease in depth through Thursday, but night and morning low clouds will still spread into portions of the inland valleys late each night through Thursday.

AVIATION

260930Z...Coast/Valleys...Low clouds based 1600-2000 ft MSL are covering the lowlands up to 20 miles inland and are slowly filling into the Inland Empire through 13z. Vis reductions (2-6SM) expected for elevated inland valleys (KSBD, KRNM). Clouds clear toward the coastline 15-18z this morning with SKC expected for the afternoon. Patchy clouds with slightly higher bases, 1800-2500 ft MSL, are expected to develop near the coast this evening (around 01-04z Sat), filling inland through 08z Sat then filling into the Inland Empire overnight.

Mountains/Deserts...Mostly clear and VFR conditions expected through tonight, except for coastal slopes shrouded in fog this morning. W/SW winds gusting 20-30 kts gusts and up to 45 kts through mtn passes to remain localized through this morning before increasing after 21z. Gusts 25-40 kts to occur this evening in parts of desert valleys and slopes with gusts locally to 55 kts through the passes. There is a 25% chance for gusts exceeding 35 kts this evening at KPSP and higher chances in the vcnty, north and east of KPSP. MOD up/downdrafts in lee of mountains.

MARINE

Breezy NW winds gusting over 20 kts Saturday afternoon and evening near San Clemente Island will create hazardous conditions to small craft. Otherwise, no additional hazardous marine conditions are expected through Wednesday.

BEACHES

While the long-period south swell has mostly diminished, a brief uptick in period (15-17 seconds) this afternoon and evening will create locally elevated surf up to 5 feet and higher rip current risk along south facing beaches.

SKYWARN

Skywarn activation is not requested. However weather spotters are encouraged to report significant weather conditions.

SGX WATCHES/WARNINGS/ADVISORIES

CA...Wind Advisory from 11 AM this morning to 5 AM PDT Sunday for Apple and Lucerne Valleys.

Wind Advisory from 5 PM this afternoon to 11 AM PDT Sunday for San Diego County Deserts.

Wind Advisory from 11 AM this morning to 5 PM PDT Sunday for San Gorgonio Pass near Banning.

PZ...None.