Heat Advisory Remains in Effect for San Joaquin Valley as Triple-Digit Temperatures Continue

The ridge of high pressure that has caused record-breaking temperatures across Central California shows no signs of retreating.Photo byAndrey GrinkevichonUnsplash

The National Weather Service (NWS) in Hanford has extended its Heat Advisory for the San Joaquin Valley, West Side Hills, and Sierra Foothills through Sunday evening, as the region continues to experience well above average temperatures. Forecast models indicate that triple-digit heat will persist through the weekend, with a 40% to 85% chance of reaching 100°F or higher in many parts of the San Joaquin Valley on Sunday.

Triple-Digit Heat Continues
The ridge of high pressure that has caused record-breaking temperatures across Central California shows no signs of retreating until early next week. Although the ridge will begin shifting eastward, temperatures will remain significantly above average for the next several days.

While the probability of reaching triple-digit temperatures is high for Sunday, conditions are expected to slightly improve by Monday, with probabilities dropping to 25% or less for most areas. However, high temperatures will still hover around 90°F for much of the upcoming week, with a 60% to 85% chance of temperatures hitting at least 90°F through Thursday, October 10.

Extended Heat Outlook
Looking beyond the immediate forecast, the Climate Prediction Center (CPC) has issued a 6-10 day and 8-14 day temperature outlook that shows a 50% to 70% chance of above-average temperatures across the region. Cooler air is expected to arrive late next week, as a trough moves into the Pacific Northwest, but temperatures will still remain approximately 5°F above normal.