35°16'N / 120°39'W / Altitude 77 m / 14:32 2026/08/25, America/Los_Angeles (UTC-7)
From: 2026/08/25, 10:00
To: 2026/08/25, 16:00
...RED FLAG WARNING IN EFFECT FROM 10 AM TODAY TO 3 PM FRIDAY FOR MANY INTERIOR PORTIONS OF SOUTHWEST CALIFORNIA DUE TO EXTREME HEAT AND INSTABILITY ALONG WITH LOCALLY GUSTY WINDS AND LOW HUMIDITIES... .A very hot and unstable air mass combined with locally gusty winds and low humidities will bring a significant risk of large plume dominated fires with rapid spread and extreme fire behavior. * TEMPERATURES...Highs 98 to 108 across the lower mountains, adjacent foothills and Cuyama Valley, and 85 to 95 across higher mountains. Lows in the mid 70s to mid 80s common in the mountains and foothills. * INSTABILITY...Very deep mixing heights of 12,000 to 20,000 feet today through Thursday, slightly lower on Friday. * WINDS...Local northwest to north winds 15 to 25 mph with gusts up to 35 mph at times, strongest across the I-5 and Highway 33 corridors. A slightly stronger northerly wind push is possible late Thursday night into Friday morning, with gusts up to 40 mph possible across the I-5 corridor. * RELATIVE HUMIDITY...Minimum humidities 10 to 20 percent each day, with isolated values as low as 8 percent Wednesday through Friday. Poor recoveries overnight hours in the mountains and foothills with humidities in the 15 to 30 percent range. * IMPACTS...There is a significant risk of large plume dominated fires with rapid fire spread and extreme fire behavior. There is a history of large plume dominated fires this time of year with similar weather and fuel conditions, including the Bridge, Bobcat, and Station fires.
San Luis Obispo
A Red Flag Warning means that critical fire weather conditions
will occur shortly. Use extreme caution with anything that can
spark a wildfire. Residents near wildland interfaces should be
prepared to evacuate if a wildfire breaks out. See
readyforwildfire.org and wildfirerisk.org for information.
NWS Los Angeles/Oxnard CA
2026/08/25, 09:06
From: 2026/08/25, 10:42
To: 2026/08/28, 20:00
* WHAT...Temperatures up to 105. * WHERE...San Luis Obispo County Interior Valleys, San Luis Obispo County Mountains, Santa Lucia Mountains, and Southern Salinas Valley. * WHEN...Until 8 PM PDT Friday. * IMPACTS...Hot temperatures may cause heat illnesses.
San Luis ObispoDrink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.NWS Los Angeles/Oxnard CA2026/08/25, 10:42From: 2026/08/26, 10:00
To: 2026/08/27, 20:00
* WHAT...Temperatures up to 99 expected. * WHERE...San Luis Obispo County Inland Central Coast, Santa Barbara County Inland Central Coast, and Santa Ynez Valley. * WHEN...From 10 AM Wednesday to 8 PM PDT Thursday. * IMPACTS...Hot temperatures may cause heat illnesses.
San Luis Obispo,San Luis Obispo County Inland Central CoastDrink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.NWS Los Angeles/Oxnard CA2026/08/25, 10:42