Good morning, I'm Cedric and this is your EM Morning Brief for Wednesday, November 12, 2025.

Overnight, NOAA's Space Weather Prediction center reported a severe geomagnetic storm that briefly reached G4 intensity.

High latitude regions may see Aurora again and experience intermittent HF radio and GPS issues today.

No tropical cyclones are active in the Atlantic or Pacific and the National Hurricane center has no areas of concern.

The Storm Prediction Center's Day one outlook carries no severe thunderstorm risk for the US with only isolated non severe thunderstorms possible along the far northern California coast late tonight.

Weather wise, the bigger safety story is winter lake effect snow continues to taper in the eastern Great Lakes this morning while early season mountain snow and periodic wind are on tap for parts of the west and Northwest through the end of the week.

USGS shows routine small earthquakes in Alaska and California over the last day.

None rise to significant status.

Let's run through the states.

Alaska High latitude space weather impacts are possible again today after last night's G4 geomagnetic storm.

Expect potential GPS degradation, HF radio issues and Aurora visibility where skies cooperate.

Utilities and pipeline operators remain in routine mitigation posture.

Winter Hazards Return to the High Country NWS keeps winter headlines for the northern Sierra and southern Cascades with snow above 6,500 to 7,500ft from late tonight into Friday.

Michigan lake effect snow lingers in parts of northern lower Michigan with localized 2 to 4 inches south of Grand Traverse Bay and and isolated higher totals where bands persist.

New York Eastern Lake Ontario region remains under a winter weather advisory through early afternoon with 1 to 3 inches of additional snow in persistent bands, greatest on the Tug Hill and into Jefferson County.

Oregon.

ODOT trip check shows carry chains or traction tires at several Cascade snowzone segments this morning.

NOAA forecasts point to increasing precipitation and lowering snow levels late tonight into Thursday with pass winds gusty at times.

Washington Winter headlines continue for the Cascades.

A winter storm warning remains in effect for portions of the North Cascades with additional heavy Snow along Highway 20 elsewhere.

Expect periods of rain changing to rain snow in the passes late Thursday into Friday with light accumulations possible in wet slick pavement.

All other states have no significant updates in the last 24 hours.

We'll keep eyes on the geomagnetic storm impacts and evolving winter hazards in the west and Great Lakes.

Stay safe.