Heavy Rain and Thunderstorms in the Plains; Snow in the Northern Rockies; Heavy Rain in Guam

A storm system moving over the Rockies today will bring marginal risks for excessive rainfall and severe thunderstorms from parts of New Mexico into western South Dakota. Heavy snow expected from northwestern Wyoming into southern Montana. Ongoing heavy showers and thunderstorms from Invest 96W could result in localized flash flooding, particularly in central or southern Guam early this morning. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Last Update: 415 AM AST Wed Oct 15 2025

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San Juan, PR Local Forecast Office

12NM SW Mayaguez PR

Marine Zone Forecast

Today

Southeast winds around 10 knots, becoming south this afternoon. Seas around 2 feet. Wave detail: southeast 2 feet at 6 seconds and northwest 1 foot at 10 seconds. Isolated showers.

Tonight

South winds 5 to 10 knots. Seas around 2 feet. Wave detail: south 2 feet at 4 seconds and northwest 1 foot at 9 seconds. Scattered showers after midnight.

Thursday

Southwest winds 5 to 10 knots. Seas around 2 feet. Wave detail: southwest 1 foot at 4 seconds and northwest 1 foot at 9 seconds. Numerous showers, mainly in the morning.

Thursday Night

Southwest winds 5 to 10 knots. Seas around 2 feet. Wave detail: west 2 feet at 3 seconds and northwest 1 foot at 9 seconds. Scattered showers in the evening, then numerous showers after midnight.

Friday

Southwest winds 5 to 10 knots. Seas around 2 feet. Wave detail: southwest 2 feet at 4 seconds and northwest 1 foot at 9 seconds. Scattered showers.

Friday Night

Southwest winds 5 to 10 knots, becoming south after midnight. Seas 2 to 3 feet. Wave detail: northwest 3 feet at 12 seconds and southwest 1 foot at 4 seconds. Scattered showers in the evening, then numerous showers after midnight.

Saturday

Southeast winds around 5 knots. Seas 2 to 3 feet. Scattered showers.

Saturday Night

East winds 5 to 10 knots. Seas 2 to 3 feet.

Sunday

East winds 5 to 10 knots. Seas 2 to 4 feet. Scattered showers in the afternoon.

Sunday Night

East winds around 5 knots. Seas 3 to 5 feet.