North America Weather & Natural Hazards Today — November 12, 2026

By Paul Harrison | Orbis Weather

Thursday, November 12, 2026 | Updated: 9:45 AM EST

United States, Canada, Mexico, Greenland and the North American Arctic

Major Coastal Storm, Arctic Cold Outbreak and Pacific Winter Storm Threaten North America

North America is facing a significant change in its weather pattern today, with a strengthening coastal storm bringing heavy rain and mountain snow to the northeastern United States, polar air spreading southward from Canada, and a powerful Pacific storm preparing to strike the western United States.

The National Weather Service (NWS) is warning of potentially dangerous travel conditions, widespread frost and freezing temperatures, lake-effect snowfall, and the possibility of blizzard conditions in California’s Sierra Nevada mountains by Friday.

Meanwhile, forecasters are monitoring developing flood risks in the Pacific Northwest and the longer-term influence of a strengthening El Niño on the approaching winter season.

Today’s Major Weather Hazards

Source: NOAA Weather Prediction Center, November 12, 2026.

1. United States: Major Weather Developments

Northeast: Coastal Storm Brings Heavy Rain and Snow

A strengthening low-pressure system is developing along the northeastern United States, threatening widespread rainfall from the Mid-Atlantic into New England.

The storm is expected to produce:

• Soaking rain across parts of the Northeast.

• Locally heavy rainfall around northeastern New Jersey and the New York City metropolitan area.

• Accumulating snow across higher elevations of upstate New York, Pennsylvania and northern New England.

• Deteriorating driving conditions in mountainous areas.

• Colder temperatures as the storm moves away.

The Weather Prediction Center identifies a limited opportunity for locally intense rainfall around the New York City area Thursday afternoon and evening.

Although widespread flash flooding is not currently forecast, localized drainage problems remain possible where heavier rain develops.

Higher elevations could experience their first widespread accumulating snowfall of the season.

Great Lakes: Lake-Effect Snow and Dangerous Cold

Cold northwesterly winds crossing the relatively warm Great Lakes will produce bands of lake-effect precipitation.

Michigan’s Upper Peninsula is among the areas most likely to experience significant snow accumulation, particularly over elevated terrain.

Snowfall intensity may vary sharply over short distances because lake-effect bands can remain concentrated over narrow corridors.

Motorists should prepare for rapidly changing visibility, slippery roads and potentially hazardous travel conditions.

Central and Eastern States: Polar Air Pushes South

One of today’s most significant developments is the southward movement of a polar air mass originating over eastern Canada.

Temperatures across much of the central and eastern United States are forecast to fall well below seasonal averages by Friday.

Overnight temperatures could drop into the 20s Fahrenheit (approximately -7°C to -2°C) across substantial portions of the central United States.

Freezing temperatures may reach the Deep South by Saturday morning.

This could threaten sensitive vegetation, outdoor plumbing and unprotected agricultural crops in areas experiencing their first significant freeze of the season.

Residents should monitor local frost and freeze advisories as the cold air advances southward.

Western United States: Pacific Storm Approaching

A powerful Pacific weather system is expected to arrive along the West Coast on Friday.

Northern California and the Pacific Northwest face increasing risks from heavy rainfall and strong southerly winds.

The Sierra Nevada mountains could experience particularly dangerous winter weather as heavy snow combines with powerful winds.

The National Weather Service warns that blizzard conditions may develop Friday night into Saturday morning, potentially making mountain travel extremely difficult or impossible.

Strong winds are also forecast to extend into the Great Basin.

Farther south, another disturbance approaching from Baja California is expected to bring showers into Southern California, followed by precipitation across Arizona, New Mexico and eventually western Texas.

2. Canada: Arctic Air Influences Continental Weather

Canada is playing a central role in the developing North American cold outbreak.

A polar air mass positioned over eastern Canada is forecast to move southward into the United States, contributing to sharply colder conditions across the Great Lakes, Midwest and eastern states.

For Canadian residents, the broader weather pattern highlights several seasonal concerns:

Eastern Canada: Monitor approaching Atlantic low-pressure systems, rain-to-snow transitions and changing travel conditions.

Ontario and Quebec: Cold air and Great Lakes moisture can produce localized snowfall and reduced visibility.

Prairie provinces: Falling temperatures, wind chill and rapidly changing road conditions remain important early-winter hazards.

British Columbia: Pacific weather systems can bring coastal rainfall and mountain snowfall, with conditions varying significantly by elevation.

These are regional monitoring priorities rather than confirmed province-wide warnings. For current Canadian alerts, consult Environment and Climate Change Canada.

3. Mexico: Pacific Moisture and Regional Weather Hazards

Mexico’s most relevant developing weather influence is a disturbance approaching the Baja California region.

According to the U.S. Weather Prediction Center, this system is expected to move toward the southwestern United States on Friday, increasing shower and thunderstorm chances north of the international border.

Weather impacts within Mexico will depend on the disturbance’s precise track and moisture distribution.

Across the country, important hazards to monitor include heavy thunderstorms in southern regions, localized flooding in mountainous terrain, strong coastal winds and changes in marine conditions.

No nationwide Mexican severe-weather emergency is established by the sources reviewed for this report.

Residents should follow Mexico’s Servicio Meteorológico Nacional for regional forecasts and official warnings.

4. Greenland and the North American Arctic

Greenland and the Canadian Arctic are entering a period when winter weather can create significant transportation and infrastructure challenges.

Key seasonal hazards include extreme cold, blowing snow, reduced visibility, sea-ice conditions and rapidly changing coastal weather.

For Arctic communities, weather conditions can vary dramatically between inland ice-covered regions and coastal settlements.

This report does not establish a specific new Arctic storm warning for November 12.

Readers should consult national meteorological agencies and local authorities before undertaking remote travel.

5. Flooding and Heavy Rainfall Outlook

The most immediate widespread precipitation concern is the northeastern coastal storm.

However, additional flood risks are developing farther west.

The Weather Prediction Center identifies a marginal excessive-rainfall risk for the Olympic Peninsula in northwestern Washington on Saturday, November 14.

A period of substantial Pacific moisture may produce heavy rainfall and localized flooding, particularly where rivers and streams respond to repeated precipitation.

Looking farther ahead, portions of eastern Texas and western Louisiana face a marginal excessive-rainfall risk on Sunday, November 15, as moisture returns northward from the Gulf of Mexico.

These outlooks describe forecast risk, not flooding already confirmed to be occurring.

6. Wildfire and Drought Conditions

Despite the approaching winter weather, wildfire concerns have not disappeared.

Gusty winds and very dry air behind the advancing cold front are expected to increase fire danger across portions of the southeastern United States today.

Dry vegetation, low humidity and wind can allow fires to spread quickly even during relatively cool weather.

Looking toward winter, NOAA’s seasonal outlook favors drought improvement across parts of the Southwest, southern Great Plains and Southeast.

Conversely, drought development or worsening is favored in portions of the northern Rockies, northeastern Oregon and eastern Washington.

These are seasonal probabilities rather than guarantees of local conditions.

7. Atlantic, Caribbean and Gulf of Mexico Tropical Outlook

The Atlantic hurricane season officially continues through November 30, but the immediate tropical outlook is relatively quiet.

According to the National Hurricane Center’s 1:00 AM EST outlook on November 12:

Tropical cyclone formation is not expected anywhere in the North Atlantic, Caribbean Sea or Gulf of Mexico during the next seven days.

This does not eliminate other marine hazards. Strong non-tropical storms, coastal flooding, rough surf and dangerous rip currents can occur without tropical cyclone development.

Official tropical updates are available from the National Hurricane Center.

8. Earthquakes, Volcanoes and Geological Hazards

North America’s natural hazards extend well beyond storms and extreme temperatures.

Earthquake monitoring

The Pacific coastline, Alaska, western Canada, California and Mexico remain important areas for seismic monitoring because of active tectonic boundaries.

Earthquakes cannot be reliably predicted by date, location and magnitude.

No specific major earthquake occurring on November 12 has been independently confirmed for this edition.

Readers can review the latest recorded events through the USGS Latest Earthquakes Map.

Volcanic activity

Alaska, the Aleutian Islands, the Cascade Range and parts of Mexico contain active volcanic systems.

Potential volcanic hazards include ash emissions, aviation disruptions, volcanic gases and localized ground hazards.

This report does not establish a newly confirmed eruption or change in alert level today.

For authoritative monitoring, consult the Alaska Volcano Observatory and USGS Volcano Hazards Program.

9. North America Weather Outlook: November 13–15

Forecast guidance from NOAA’s Weather Prediction Center, issued November 12. Conditions and timing may change.

10. Safety and Preparedness

Residents in affected regions should take appropriate precautions:

• Winter storms: Avoid unnecessary mountain travel during blizzard conditions and carry emergency supplies.

• Flooding: Never drive through flooded roads, even when water appears shallow.

• Freezing temperatures: Protect sensitive plants, pets and exposed pipes.

• Strong winds: Secure loose outdoor objects and monitor local power outage information.

• Wildfire danger: Avoid outdoor burning where dry, windy conditions are present.

Local emergency alerts and official evacuation instructions should always take priority over general regional forecasts.

11. Orbis Weather Analysis: A Continent Entering Winter

The most important feature of today’s North American weather pattern is the contrast between incoming Pacific moisture in the West and a powerful intrusion of polar air across the East.

That contrast is creating several distinct hazards simultaneously: mountain blizzards in California, soaking rainfall in the Northeast, lake-effect snow near the Great Lakes and freezing temperatures spreading into southern states.

The strengthening El Niño adds another important dimension to the approaching winter.

NOAA’s 2026–27 seasonal outlook identifies regional differences in temperature, precipitation and drought probabilities, but these longer-range forecasts should not be confused with predictions of individual storms.

The immediate priority remains the developing coastal and Pacific storm systems and the southward movement of cold air.

12. Official Weather and Natural Hazard Sources

Orbis Weather uses publicly available meteorological and geological information to provide independent regional analysis.

Primary sources for this edition include:

• NOAA National Weather Service — U.S. forecasts and warnings.

• NOAA Weather Prediction Center — storm, precipitation, snowfall and excessive-rainfall outlooks.

• Storm Prediction Center — severe thunderstorm and fire-weather outlooks.

• National Hurricane Center — Atlantic and eastern Pacific tropical activity.

• Environment and Climate Change Canada — Canadian forecasts and alerts.

• Mexico’s National Meteorological Service — Mexican weather forecasts.

• USGS Earthquake Hazards Program — earthquake monitoring.

Editorial Methodology and Transparency

Reporting period: November 12, 2026, with forecast developments through November 15.

Prepared for: Orbis Weather

Author: Paul Harrison

Methodology: This report combines official short-range forecast discussions, tropical weather outlooks, excessive-rainfall guidance and seasonal climate information. Forecast risks are distinguished from confirmed weather events, and no unverified casualty figures, earthquake magnitudes or disaster declarations have been included.

Coverage limitation: Detailed, date-specific official forecasts were available for the United States. Canadian, Mexican, Greenlandic and Arctic sections provide broader regional context where equivalent current local bulletins were not independently verified.

Corrections policy: Orbis Weather aims to provide accurate, clearly sourced reporting. Material factual errors should be corrected promptly, with significant updates identified in the article.

Important disclaimer: Weather forecasts are subject to change. Orbis Weather is an independent information publisher and is not an official government warning service. Readers should follow national meteorological agencies and local emergency management authorities for urgent alerts and protective instructions.

Final Outlook

North America’s weather is becoming increasingly active as the continent moves deeper into November.

The Northeast faces a strengthening coastal storm, the Great Lakes are preparing for lake-effect snow, and much of the central and eastern United States is bracing for a sharp temperature drop.

On the opposite side of the continent, a powerful Pacific storm threatens heavy rain, strong winds and potentially severe blizzard conditions in California’s mountains.

The greatest immediate concerns are dangerous mountain travel, rapidly falling temperatures, heavy precipitation and localized flooding.

Orbis Weather will continue monitoring developments across the United States, Canada, Mexico and the wider North American region.

Orbis Weather — Global Weather. Local Impact.

Reporting by Paul Harrison.