Another brutally hot day today and the worst of the heat is still ahead. Several inland areas soared into the triple digits again today including Poway, Santee, Ramona and Escondido and along the coast even Encinitas hit 90 degrees. This long-duration heat wave will last into early next week bringing dangerous temperatures across the county as a strong high-pressure ridge expands over the desert southwest. Temperatures are trending 5 to 15 degrees above average with Saturday through Monday the hottest days of the stretch.
The Excessive Heat Warning has been extended until 8pm Tuesday for the entire county. These will be some of the hottest temperatures of the year and with warm overnight temperatures, mostly staying in the 70s, those without air conditioning will have difficulty keeping cool.
We won't see a lot of record daily highs broken because they are so high this time of the year and will be difficult to reach; for example, the record for San Diego for Sunday is 107, while I'm forecasting 89 degrees. I'm forecasting 105 for Escondido and Ramona on Sunday which would break their record highs for the day.
On top of the heat, it's getting more humid as monsoon moisture builds again. We saw a few stray showers and thunderstorms today and there will be a slight chance each day through Monday with the best chance near the mountains but possible for some activity to move west into the valleys. Dry lightning will be a concern as well as brief heavy rain, small hail and gusty winds.
Fire danger remains elevated due to the extreme temperatures and precautions should be taken to avoid any sparks that may start a fire. That includes checking for anything dragging from your vehicle and using extra caution with any activities you'll be taking part in this Labor Day weekend including dousing any campfires.
Temperatures drop back to near normal levels by Thursday with greater cooling into next weekend as a trough of low pressure dives south breaking down the strong high-pressure ridge.
Tips to beat the heat:
Drink plenty of water, wear light-weight, loose-fitted clothing, avoid outdoor activity during the heat of the day, stay inside in air conditioning as often as possible, avoid caffeine and alcohol, never leave children or pets inside hot vehicles, provide pets with extra water and bring them inside if possible or at least provide adequate shade.
Saturday's Highs:
Coast: 82-95°
Inland: 95-108°
Mountains: 90-103°
Deserts: 108-112°
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