Southern California firefighters being tested by record heat and windy conditions

On Saturday there is a slight chance of isolated dry lightning strikes across the eastern San Gabriel Mountains during Red Flag Warning conditions

Above: Photo taken from the back yard of the USFS District Office in Alpine, CA during the West Fire July 6, 2018. USFS photo.

(Originally published at 9:20 a.m. PDT July 7, 2018)

The predictions for record heat in Southern California were accurate Friday as high temperatures soared into the triple digits. In downtown Los Angeles the old record for the date was broken by 10:15 a.m. when it hit the previous mark set in 1992 of 94 degrees. By the end of the day it was 108. The temperature at UCLA reached 111 degrees, the hottest temperature ever recorded there.

Other record-setting daily temperatures Friday in Southern California:

  • 117 – Van Nuys Airport
  • 114 – Burbank Airport
  • 115 – Ramona
  • 118 – Riverside

Firefighters were challenged by not only the heat but dry winds as fires broke out in several areas.

As the temperature reached 109 degrees, U.S. Forest Service firefighters on the Cleveland National Forest found themselves in a structure defense mode at their District Office in Alpine, with the West Fire adjacent to the building’s back yard and the rest of the 400-acre blaze across the street. Live footage shot by a local TV station showed numerous structures were destroyed.

forest service district office fire
Photo taken from the front yard of the USFS District Office in Alpine, CA during the West Fire. USFS photo.

On the Santa Barbara coast sundowner winds pushed the Holiday Fire through the hills above Goleta, burning 10 to 20 homes according to fire authorities. Even into the night temperatures at the fire scene remained above 100 degrees.

holiday fire goleta
At the Holiday Fire, Santa Barbara County Fire Department firefighters apply water at a home off Fairview Avenue in Goleta. SBFD photo.

The Valley Fire that started Friday has burned at least 1,000 acres near Highway 38 on the San Bernardino National Forest. At last report it was headed into the San Gorgonio Wilderness Area. Mandatory evacuation are in effect for the Forest Falls Community east of the highway. Southern California Incident Management Team 2 will be assuming command.

Much of Southern California is again under a Red Flag Warning Saturday as the huge high pressure dome lingers over the area, bringing more of the same very high temperatures, 2 to 8 percent relative humidities, and gusty winds.

And just to make the situation more interesting, there is a slight chance of isolated dry lightning strikes across the eastern San Gabriel Mountains along with thunderstorm-driven winds.

map Red Flag Warnings, July 7, 2018
Red Flag Warnings, July 7, 2018.

Elevated fire danger in the Southwest today

Above: map showing minimum relative humidity levels predicted for Saturday in the Western United States. Red Flag Warning areas are in Utah and Northern California. NWS.

The official Red Flag Warnings for Saturday only include portions of Utah and Northern California, but low humidities will be prevalent across most of the southwest one-quarter of the country. Generally, the winds will not be especially strong, which is probably what kept the Red Flag Warning areas from being larger than they are.

Very high to extreme fire danger levels are predicted for large portions of Utah, Colorado, Arizona, and New Mexico, as well as the lower elevations in Northern California.

Predicted fire danger for Saturday
Predicted fire danger for Saturday.
Fire Weather Outlook
Predicted Fire Weather Outlook for Saturday. NWS.
Red Flag Warnings for Saturday
Red Flag Warnings for Saturday.
Sustained wind speeds predicted
Sustained wind speeds predicted for 3 p.m. Saturday. NWS.

Red Flag Warnings for Wednesday

Red Flag Warnings are in place across much of the West Wednesday and going into the weekend.

Increasingly gusty winds and single-digit relative humidities are forecast Wednesday and Thursday across much of the West, spurring a series of Red Flag Warnings.

The warnings affect swaths of California, Nevada, Utah, Colorado, Wyoming and Arizona. Any wildfire starts could spread rapidly, the National Weather Service says.

Conditions could hinder some of the progress crews have made on the Pawnee Fire burning since Saturday in the Lake County hills northwest of Sacramento, California.

Wildfire concerns going into the weekend before July Fourth have already put a damper on some fireworks celebrations. Flagstaff, Arizona, has canceled their planned display, as have a number of other smaller cities across the state.

 

Red Flag Warnings in 9 states May 11, 2018

The National Weather Service has issued Red Flag Warnings or Fire Weather Watches for areas in California, Arizona, New Mexico, Texas, Colorado, Oklahoma, Kansas, New Hampshire, and Maine.

The map was current at 6:20 a.m. MDT on Friday. Red Flag Warnings can change throughout the day as the National Weather Service offices around the country update and revise their forecasts.

The NWS is not predicting Red Flag Conditions in Utah. On Thursday officials on the Fish Lake National Forest in southern Utah conducted a 150-acre prescribed fire (see below).