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 >

Coastal Waters Forecast for Coastal Waters of Northern Puerto Rico out 10 NM (AMZ712) (Text-Only)
NWS Forecast for: Coastal Waters of Northern Puerto Rico out 10 NM (AMZ712)
Issued by: National Weather Service San Juan, PR
Last Update: 329 PM AST Wed Oct 15 2025




Tonight: Southwest winds 5 to 10 knots. Seas around 3 feet. Wave detail: northeast 3 feet at 8 seconds and northwest 1 foot at 9 seconds. Numerous showers with isolated thunderstorms early this evening, then isolated showers late this evening. Isolated showers late.

Thursday: Southwest winds 5 to 10 knots, becoming west 10 to 15 knots in the afternoon. Seas 2 to 3 feet. Wave detail: west 2 feet at 4 seconds and northeast 2 feet at 8 seconds. Scattered showers.

Thursday Night: Southwest winds 5 to 10 knots. Seas around 3 feet. Wave detail: west 2 feet at 4 seconds and northeast 2 feet at 8 seconds. Scattered showers in the evening.

Friday: Southwest winds 5 to 10 knots. Seas 3 to 4 feet. Wave detail: north 3 feet at 9 seconds and west 2 feet at 4 seconds. Showers in the afternoon.

Friday Night: Southwest winds 5 to 10 knots, becoming south after midnight. Seas 4 to 5 feet. Wave detail: north 4 feet at 11 seconds and northeast 2 feet at 14 seconds. Scattered showers in the evening.

Saturday: Southeast winds around 5 knots, becoming east around 5 knots in the afternoon. Seas 4 to 5 feet. Wave detail: north 4 feet at 10 seconds and northeast 2 feet at 13 seconds. Scattered showers in the afternoon.

Saturday Night: East winds 5 to 10 knots. Seas 4 to 5 feet.

Sunday: East winds 5 to 10 knots, increasing to 10 to 15 knots in the afternoon. Seas 5 to 6 feet. Scattered showers in the afternoon.

Sunday Night: East winds 10 to 15 knots. Seas 6 to 8 feet.

Monday: East winds 10 to 15 knots, increasing to 15 to 20 knots in the afternoon. Seas 7 to 8 feet. Scattered showers.

Monday Night: East winds 10 to 15 knots. Seas 7 to 8 feet.

winds and seas higher in and near thunderstorms.







Zone Forecast: Coastal Waters of Northern Puerto Rico out 10 NM (AMZ712)

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