textproduct: San Diego

SYNOPSIS

A warming trend is expected through the weekend with early next week a few degrees cooler. High temperatures will warm to as much as 8 to 12 degrees above average for the deserts over the weekend with moderate to major HeatRisk for the lower deserts for the weekend. Nights will be warmer as well with record warm minimum temperatures possible for several locations each day for Friday through Sunday. The marine layer will become shallower, but with night and morning coastal low clouds still reaching the western valleys late each night.

SHORT TERM (Today through Thursday)

High pressure over the eastern Pacific, well off the West Coast, will expand into southern California continuing the warming trend through Wednesday. High temperatures will warm around 5 degrees for inland areas today and another 5 to locally 10 degrees for inland areas on Wednesday. High temperatures on Wednesday will be a few degrees above average near the coast to 5 to locally 10 degrees above average for inland areas. High temperatures on Wednesday will range from the lower to mid 70s near the coast to the upper 80s to upper 90s for the Inland Empire with 104 to 108 for the lower deserts. On Thursday it may cool a few degrees for the coast and valleys.

The marine layer is around 2500 feet deep with low clouds expected to increase in coverage for coastal areas and eventually spread into portions of the inland valleys by around sunrise this morning. The marine layer will decrease in depth to around 2000 feet for Wednesday and Thursday with night and morning coastal low clouds spreading into the western valleys.

LONG TERM (Friday through Monday)

Additional slight warming will spread inland for Friday and Saturday with the coast and valleys a few degrees warmer on Friday and the mountains and deserts a few degrees warmer on Saturday. Then slow cooling will spread inland on Sunday and Monday with the coast and valleys a few degrees cooler on Sunday and most areas a few degrees cooler on Monday.

High temperatures on Saturday will be a few degrees above average near the coast to 8 to 12 degrees above average for the mountains and deserts. High temperatures on Saturday will range from the lower to mid 70s near the coast to the upper 80s to upper 90s for the Inland Empire with 108 to 112 for the lower deserts.

High temperatures on Monday will be mostly within a few degrees of average for the coast and valleys to 4 to 8 degrees above average for the deserts. High temperatures on Monday will range from the lower to mid 70s near the coast to the 80s and lower 90s for the Inland Empire with 106 to 110 for the lower deserts.

Moderate HeatRisk is expected for portions of the deserts and Inland Empire and possibly inland Orange County as early as Wednesday. More widespread moderate HeatRisk is expected for the deserts and portions of the Inland Empire for Thursday and Friday. Not much change for the weekend except portions of the lower deserts could reach major HeatRisk. The lower deserts could be near the threshold for and Extreme Heat Warning for Saturday and Sunday.

While the currently forecast high temperatures would not tie or exceed any existing high temperature records, there could be a few overnight temperatures near record levels for the mountains on Thursday. Several record warm minimum temperature records could be tied or broken for each day for Friday through Sunday, mainly for the coast and mountains with a few in the valleys as well. The sea surface temperature of 20.2C/68.4F at Scripps Pier on Monday was among the 10 percent of warmest for the date.

AVIATION

091000Z...Coast/Valleys...Areas of low clouds based 1500-2000 ft MSL over coastal areas will continue to increase in coverage through 13z with some western valleys filling in. Intermittent scattering may occur at coastal TAF sites. Scatter out Tuesday, around 16-17Z. SKC expected through late this evening, but patchy low clouds based 1000- 1500 ft MSL should eventually reform over coastal areas early Tuesday morning. Any low clouds will remain within 5-10 miles of the coastline.

Mountains/Deserts...VFR and SKC today and tonight.

MARINE

No hazardous marine conditions are expected through Saturday.

BEACHES

Surf and rip current activity to through this morning as a southerly swell arrives. Surf peaks Tue-Wed with surf 4-7 feet and sets up to 10 feet at south-facing beaches, then gradually diminishes late this week. See the Beach Hazards Statement for more details.

SKYWARN

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

SGX WATCHES/WARNINGS/ADVISORIES

CA...Beach Hazards Statement through Thursday afternoon for Orange County Coastal Areas-San Diego County Coastal Areas.

PZ...None.