textproduct: San Diego

SYNOPSIS

Cooler weather for inland areas is expected this weekend into the first half of next week as a trough of low pressure moves over the region. This will also bring breezy conditions across the mountains and deserts this afternoon through Saturday evening. High pressure looks to expand over the West Coast by the latter half of next week, which would lead to a warming trend.

Updated Aviation and Marine Discussion

Zooming out, we see a 591 mb high to our southwest over the East Pac and 540 mb low off the coast of British Columbia. The high's influence has led to a shallower inversion, leading to some hazy conditions in the western valleys and clouds sticking closer to the coast. Clouds will struggle to clear at the beaches, but may do so intermittently later this afternoon. Heights lower as the area of low pressure to the north moves closer to our region over the weekend. This will lead to increased winds over the mountains and deserts starting later this afternoon through Saturday. Winds will mostly be near 25-40 MPH with highest winds in the San Gorgonio Pass locally over 50 MPH, so please be sure to drive with care. Cooler weather will also occur inland over the weekend with Sunday being the coolest day overall. Highs in the 70s and 80s will occur across most areas with highs 95-100 degrees across the lower deserts.

The trough will remain in place into early next week, with minimal changes in the weather from day to day. Marine layer clouds will work their way into most areas west of the mountains each night and morning into the middle of next week. Cluster analysis shows fair agreement on a ridge off the coast strengthening by the latter half of next week. This will lead to a warming trend with less wind and a deeper marine layer, but how warm we become is still something to be determined as the timing and strength of the departing trough may try to influence our weather pattern as well.

AVIATION

060530Z...Coast/Valleys...Low clouds based 1400-1800 ft MSL have settled in over coastal areas this evening. Clouds will push inland overnight filling San Diego/Orange County valleys and reaching into portions of the Inland Empire. VIS 4-6 SM for inland edge of clouds in valleys/Inland Empire (i.e. KRNM, KSBD). Clouds will clear from inland areas 16-19z Sat, but will struggle to clear at all within 5- 10 miles of the coastline Saturday afternoon. Clouds move inland again starting around 00-02z Sun with bases 2000-2500 ft MSL.

Mountains/Deserts...VFR with increasing clouds AOA 20000ft MSL tonight into Saturday. Southwest-west winds will increase in the mountains and deserts with gusts reaching 30-40 knots after 18z Sat. Winds slowly decrease late Saturday evening and overnight. MOD up/downdrafts and pockets of LLWS in lee (north and east) of mountains.

MARINE

No hazardous marine conditions are expected through Wednesday.

SKYWARN

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

SGX WATCHES/WARNINGS/ADVISORIES

CA...None. PZ...None.