CME arrival at Earth is anticipated and a G4 Watch is now in effect for 2 Jun. CME arrival later on 1 Jun could lead to G3, with G4 potential increased on 2 Jun, and as CME passage weakens, G1-G2 still possible on 3 Jun. Full story at swpc.noaa.gov/news/g4-severe…

11:27am CDT #SPC Day1 #FireWX spc.noaa.gov/products/fire_…

With triple digits in the forecast again today, be sure to practice heat safety AND remain cognizant of cold water safety this weekend! #CAwx

1:46pm CDT #SPC Day2 #FireWX spc.noaa.gov/products/fire_…

Despite the hot weather, we are monitoring some isolated mountain thunderstorm chances this weekend and again later into the week ahead. Be sure to stay weather aware if recreating at higher elevations and always have multiple ways to receive weather alerts! ⚡️📻📱 #CAwx

We will not know the true nature of the CME structure until it arrives at our solar wind observatories located 1 million miles from Earth. It is at that point, SWPC forecasters can make determinations about warnings . Please continue visit spaceweather.gov for the latest.

STO issues Red Flag Warning valid at Jun 2, 2:00 AM PDT till Jun 2, 8:00 PM PDT mesonet.agron.iastate.edu/vtec/f/2025-O-…

🚩 Red Flag Warning in Effect 🚩 The NWS Sacramento has issued a #RedFlagWarning from 2 am to 8 pm Monday for the northern Sacramento Valley, including portions of our Unit covering Colusa County. This alert is due to gusty winds and low relative humidity. Winds ... North to

A Red Flag Warning has been issued for the Northern & Central Sac. Valley along and west of I-5 corridor and adjacent Coastal Range for low humidity and gusty winds creating critical fire weather conditions. Please see weather.gov/sto for more details! #CAwx

Fire danger rising as north wind develops across interior NorCal and the North Bay mountains tonight - Mon AM. Gfx wind near 2,500’ & RH% plus RH% values near sea level. This coincides with the declaration of the start of fire season w/ Santa Rosa Fire Department Monday #CAwx 6/1/2025

🚩 RED FLAG WARNING 🚩 The National Weather Service has issued a Red Flag Warning from 2 AM to 8 PM Monday for the Northern and Central Sacramento Valley and the adjacent Northern Coastal Range due to moderate to strong northerly winds and low relative humidity. Use extreme

1:07am CDT #SPC Day1 #FireWX spc.noaa.gov/products/fire_…

Our Red Flag Warning remains in effect for the Northern and Central Sac. Valley and into the Coastal Range until 8 PM tonight from a combination of low humidity and gusty winds. Please continue to practice fire safety and visit weather.gov/sto for more details! #CAwx

CAL FIRE Law Enforcement arrested a woman for arson for a fire in Thermalito on Saturday, May 31. See the news release for details.

#NationalFireNews: Total acres burned through May is very close to the 10-year average at 99.5%, with an above average tally of wildfires of 133%. 🔥 Read the full outlook & see maps for July, August, & September here --> nifc.gov/nicc-files/pre…

REDDING – CAL FIRE Shasta Trinity Unit announces crews will begin scraping hand lines on the lower portion of the project, located between Millville Plains Road and the Bear Creek Bridge, in preparation for a prescribed burning of roadside grass.

CAL FIRE Expands Night Aerial Firefighting Capabilities with Upcoming Training

Beale Air Force Base in Yuba County is scheduled to conduct a 140 acre vegetation burn within the boundaries of the base today.

Elevated fire weather conditions return tomorrow across the Northern and Central Sacramento Valley from the combination of low humidity and breezy winds. Be sure to continue practicing fire safety and have an emergency plan in place for this summer! #Cawx

.CAL FIRE will be conducting night aerial firefighting training exercises for helicopters at Lake Berryessa (Napa County) and Lake Englebright (Nevada/Yuba Counties) between June 4-10. Night flights are scheduled for June 5, 6, 9 and 10, extending into the late night hours until