Overview
- Winter Storm Warnings cover Southern California mountains through Thursday into Friday, with 6 to 24 inches of snow by elevation and localized gusts up to 75 mph; forecasters note possible accumulations on the I‑5 Grapevine and Cajon Pass.
- The Central Coast faces Flood Watches and a debris‑flow alert near the Gifford and Madre burn scars after gauges hit thresholds, with brief downpours possible as a cold front sweeps through and High Surf Advisories continuing.
- San Diego County enters a second and third round of rain, strong winds and mountain snow through Thursday, bringing renewed risk of downed trees and outages and dangerous rip currents under a High Surf Advisory through Friday.
- Southern Colorado remains under overlapping High Wind and Red Flag Warnings on Wednesday, with very low humidity and gusts frequently 60 to 75 mph driving extreme fire danger.
- A separate northern system brings Winter Storm and Blizzard Warnings from the Dakotas to northern Michigan, including 10 to 18 inches and 60 mph gusts along Minnesota’s North Shore, while the UK issues yellow warnings for rain and snow alongside a cold‑health alert.