textproduct: San Diego

SYNOPSIS

High temperatures into early next week will generally range from a few degrees above average near the coast to 5 to 10 degrees above average for the mountains and deserts with some minor day-to-day differences. Minor to moderate HeatRisk, heat-related impacts affecting those sensitive to heat, will continue for the inland valleys and deserts through next Wednesday. Marine layer low clouds will spread into portions of the western valleys during the nights and early mornings, with day-to-day variations. A cooling trend with a deepening marine layer will follow mid to late next week.

SHORT TERM...Today through Tue June 16

The sounding from this afternoon shows plenty of mid-level moisture still in our atmosphere, brought by southwesterly flow aloft around a mid-level high pressure over northwest Mexico. Similar to last night, this is leading to a rather patchy and intermittent marine layer. Like this morning, these clouds will have cleared from land areas and only be lingering along parts of the immediate coast by mid-morning today.

After another warmer-than-average morning, also due to mid-level moisture preventing efficient radiational cooling, afternoon temperatures today will be a tad cooler than yesterday, with the exception of the deserts and parts of the eastern Inland Empire. After today, while the immediate coast will continue to cool slightly or experience similar temperatures, inland areas will warm slightly Monday-Tuesday. This will be more noticeable for weather stations than for the average person, though, with temperatures continuing to be anywhere from a few to 10 degrees above average through Tuesday. Things will also continue to feel a bit more humid than what we're typically used to this time of year.

Nightly and morning low clouds will continue to impact the coastal regions each day through this period, though some amount of lingering mid- level moisture will make clouds patchy in coverage to some each extent each night, especially earlier in the evening.

LONG TERM...Wed June 17 to Sun June 21

Conditions will start to cool off as low pressure to our southwest sneaks under the Pacific High. This trend will become more apparent towards the end of the week as a broader, stronger trough moves into the region from the west Friday into the weekend. This will reduce temperatures to near average for mid next week, then slightly below for the end of the week, with high temperatures a few to perhaps 10 degrees below average for Saturday/Sunday. This will also deepen the marine layer, leading to more widespread low clouds getting further inland overnight into the mornings and likely lingering longer in the mornings and arriving earlier in the evenings some days late week.

AVIATION

141130Z...Coast/Western Valleys...Low clouds with bases 800-1200 ft MSL will intermittently be BKN-OVC along the coastline of Orange and San Diego counties and up to around 5-10 miles inland through 15Z. VIS 0-5SM in valleys east of I-15 in SD County and elevated coastal terrain where cigs reach. Scatter to beaches 15-18z Sun, then VFR conditions prevail through Sunday afternoon. Low clouds with similar bases are expected to develop in patchy fashion over coastal areas after 02z Mon, starting in SD County, and will continue to slowly fill in with similar bases, especially after 05Z Mon.

Mountains/Deserts...VFR conditions are expected through Sunday evening with high clouds AOA 10 kft MSL. Gusty onshore winds through desert slopes and San Gorgonio Pass into the Coachella Valley bringing gusts 20-25 kts this afternoon, after 00z Mon. These winds will begin to gradually weaken beginning around 06-09Z Mon.

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...Beach Hazards Statement through Friday evening for Orange County Coastal Areas-San Diego County Coastal Areas.

PZ...Beach Hazards Statement through Friday evening for Coastal Waters from San Mateo Point to the Mexican Border and out to 10 nm.