Natural Hazards

Predicting the Weather

You're at the trailhead and ready for rain, but how handy should you keep your shell? Watch the clouds to predict precipitation.

Cirrostratus clouds:
Wispy cotton candy clouds that signify that wet weather is on the way within the next 24 hours.

Cirrocumulus clouds:
White streaks, like those that planes leave in their wake, may mean a tropical storm or hurricane is on the way in tropical climes.

Altostratus clouds:
Heavy-looking, dark clouds that block the sun and cover the whole sky typically indicate rain or snow is en route.

Altocumulus clouds:

These fluffy balls often dot the morning sky when afternoon thunderstorms are on the horizon.

Stratus and nimbostratus clouds:
Low-hanging clouds that block visibility and sunlight and have little definition usually mean rain is coming in short order.

Cumulonimbus clouds:
Super fluffy, cotton-like balls, shaped into an anvil, are a harbinger for lightning, hail, and tornadoes.

Stay dry in the wettest conditions with Marmot’s EVODry – rainwear reinvented at the molecular level.