Here's the latest from Caltrans:
[IN THE NORTHERN CALIFORNIA AREA]
IS CLOSED TO NORTHBOUND TRUCKS 10 MI NORTH OF REDDING /AT FAWNDALE RD/
(SHASTA CO) - DUE TO SNOW - TRUCKS ARE ADVISED TO USE AN ALTERNATE ROUTE
CHAINS OR SNOW TIRES ARE REQUIRED FROM 3 MI SOuTH TO 4 MI NORTH OF
DUNSMUIR (SISKIYOU CO)
CHAINS ARE REQUIRED ON ALL VEHICLES EXCEPT 4-WHEEL-DRIVE VEHICLES WITH SNOW
TIRES ON ALL 4 WHEELS FROM WEED TO 3 MI NORTH OF WEED (SISKIYOU CO)
A HIGH WIND ADVISORY IS IN EFFECT FROM WEED (SISKIYOU CO) TO THE
OREGON STATE LINE - TRAVEL IS NOT RECOMMENDED FOR CAMPERS, TRAILERS OR
PERMIT LOADS
NORTHBOUND TRUCKS ARE BEING SCREENED 10 MI NORTH OF REDDING (SHASTA CO)
- TRUCKS MUST HAVE MAXIMUM CHAINS IN THEIR POSSESSION IN ORDER TO PROCEED
- PERMIT LOADS ARE PROHIBITED