Before a winter storm arrives

Illustrative photograph · Quin Stevenson · CC0 1.0 (published on Unsplash 15 April 2015) · Image source

Snow is only part of the forecast

Winter warnings may describe heavy snow, ice, strong wind or a combination. Read the official message to understand the expected impacts and timing. Small changes in temperature can change precipitation type, so check updates rather than relying on an earlier forecast screenshot.

Prepare before conditions worsen

Consider postponing nonessential travel when officials advise it. Keep essential supplies accessible and charge communication devices. Check on people who may need assistance. If using backup power or heating, follow the manufacturer’s safety instructions and never run a fuel-powered generator indoors.

Use road information as well as forecasts

A weather forecast does not certify that a road is open or safe. Consult the relevant road authority for closures and restrictions. Reduced visibility and ice can remain dangerous after snowfall stops. On this site, the forecast table describes modeled weather; official warnings and local travel advice are separate information sources.

Ice, wind and timing

A winter message may be about snow, freezing rain, wind or all three. A small temperature change can turn a rain forecast into ice. Read the official text for when the worst conditions are expected, not only the daily snow icon. Power outages are a practical hazard: keep a way to stay warm that does not include running a generator, grill or fuel heater indoors or in a garage. Carbon monoxide incidents rise during winter storms.

Travel is a separate decision

The forecast table does not say that a highway is open or treated. Check the state or national road authority, and delay nonessential trips when officials recommend it. If you are already on the road when conditions worsen, official guidance is to slow down, increase following distance and exit if travel becomes unsafe. Do not assume that other drivers’ headlights mean the pavement is only wet.

Sources and further reading

Official National Weather Service reference. Source checked September 28, 2026. This general guide does not replace a current warning or advice from local authorities.