Marine Weather and Tide Forecast for Midway City, CA

DISCUSSION
FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...

.SHORT TERM (Today through Friday)...
Weak offshore flow on Thursday is trending weakly onshore. High temperatures for coastal areas are expected to be a few degrees cooler today with the deserts and inland valleys slight warmer and the mountains around 5 degrees warmer. There could once again be several record or near-record high temperatures today, but mostly for the valleys, mountains, and deserts.

Onshore flow will strengthen on Saturday with cooling for most areas. The deserts will be a few degrees cooler than today to 8 to 12 degrees cooler for the coast and western valleys. High temperatures on Saturday are expected to range from the upper 60s and lower 70s near the coast to the lower to mid 80s for the inland valleys with the lower deserts in the lower 90s. These high temperatures are around 5 degrees above average near the coast to 10 to 15 degrees above average for the inland valleys, mountains, and deserts, well-above average but not record-setting.

Mid and high clouds will spread across the area for late today through late Saturday afternoon. The local WRF is still forecasting a coastal eddy to develop late today. The mid and high clouds are expected to keep any low clouds and fog for coastal areas for tonight into Saturday morning patchy in coverage. The coastal eddy continues for Saturday night into Sunday morning with deepening of the marine layer. Greater coverage of low clouds and fog for coastal areas is expected for Saturday night into Sunday morning with the decrease in higher level moisture.

As high pressure aloft begins to strengthen on Sunday, high temperatures are expected to warm around 5 degrees for the coast, valleys, and coastal slopes of the mountains as the marine inversion begins to strengthen and lower.

.LONG TERM (Monday through Thursday)...
High pressure will strengthen next week with the heat peaking around Thursday with high temperatures around 30 degrees above average for the mountains and inland valleys. High temperatures on Thursday will range from the lower to mid 80s near the coast to the mid 90s to 103 for the inland valleys with the lower deserts reaching 104 to 108. Widespread daily record high temperatures are expected for Tuesday through Thursday with some exceeding the existing monthly records for March. There will also be many warmest overnight temperature records for the date set as well.

AVIATION
131200Z...VFR with mostly clear skies expected through Friday evening. Model guidance is hinting at the potential for patchy low clouds over the waters and coastal areas after 12z Saturday morning.
Increasing high cloud cover conflicts with the coastal eddy expected by 12z Sat, yielding an uncertain forecast for this cloud cover potential.

MARINE
No hazardous marine conditions are expected through Tuesday.

CLIMATE

The following are the existing highest temperature records for March for selected locations along with the highest daily NBM probability to set a new March record for NEXT week. This is not a comprehensive list, but the most likely locations to tie or set new monthly record high temperatures for March are in the deserts, valleys, and mountains.

Location March Record NBM Probability

Palm Springs 104 100 percent (Fri)
Indio 104 100 percent (Fri,Sat)
Thermal 103 100 percent (Thu,Sat)
Ramona 94 83 percent (Fri)

Palm Springs NBM probabilities to exceed 104 are 75+ percent for Wed-Sat.
Indio NBM probabilities to exceed 104 are 90+ percent for Wed-Sat.
Thermal NBM probabilities to exceed 103 are 75+ percent for Tue-Sun.
Ramona NBM probabilities to exceed 94 are 75+ percent on Tue,Thu,Fri.

The existing highest 500 mb height for NKX for March is 590 DM. That could be exceeded for multiple days next week between Tuesday and Friday.

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

SGX WATCHES/WARNINGS/ADVISORIES
CA...Heat Advisory until 8 PM PDT this evening for Orange County Coastal Areas-Orange County Inland Areas-San Bernardino and Riverside County Valleys-The Inland Empire-San Diego County Coastal Areas-San Diego County Valleys.

PZ...None.