Satellite imagery and doppler radar indicated both the development of strong thunderstorms across various sections of the local waters. Conditions are likely to deteriorate during the next few hours, lasting through the evening. These thunderstorms are capable of producing winds up to around 30 knots, frequent lightning, and torrential rain. Waterspouts are possible.
Mariners can expect gusty winds to around 30 knots, locally higher waves, and lightning strikes. Boaters should seek safe harbor immediately until these storms pass.
There is an increasing risk for Flash Flooding through the weekend due to favorable atmospheric conditions resulting in periods of heavy rainfall as well as saturated soils and rivers running above normal levels
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WHAT: Flooding caused by excessive rainfall.
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WHERE: Puerto Rico and the U.S. Virgin Islands.
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WHEN: Through Sunday afternoon.
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IMPACTS: Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Low-water crossings may be flooded.
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ADDITIONAL DETAILS:
- A trough combined with deep moisture will bring periods of showers and thunderstorms across the islands during the next several days, particularly from today through at least Sunday.
Based on the latest guidance, the most likely time period for the heaviest rainfall activity is from this afternoon into Saturday. The areas most likely to receive the highest rainfall accumulations are portions of the southeast and east sections of Puerto Rico, as well as Vieques, Culebra and the US Virgin Islands.
Rainfall accumulations are expected to range from 2 to 4 inches, especially for the eastern half of Puerto Rico and the Virgin Islands with isolated higher amounts possible between 6 and 8 inches. Elsewhere, 1 to 3 inches are expected.
Due to already saturated soils, any prolonged period of heavy rainfall will result in urban and small stream flooding. Some rivers will likely overflow their banks. Therefore, Isolated life threatening flash flooding and mudslides are possible as well.
...There is an increasing risk for Flash Flooding through the weekend due to favorable atmospheric conditions resulting in periods of heavy rainfall as well as saturated soils and rivers running above normal levels... * WHAT...Flooding caused by excessive rainfall. * WHERE...Puerto Rico and the U.S. Virgin Islands. * WHEN...Through Sunday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Low-water crossings may be flooded. * ADDITIONAL DETAILS... - A trough combined with deep moisture will bring periods of showers and thunderstorms across the islands during the next several days, particularly from today through at least Sunday. Based on the latest guidance, the most likely time period for the heaviest rainfall activity is from this afternoon into Saturday. The areas most likely to receive the highest rainfall accumulations are portions of the southeast and east sections of Puerto Rico, as well as Vieques, Culebra and the US Virgin Islands. Rainfall accumulations are expected to range from 2 to 4 inches, especially for the eastern half of Puerto Rico and the Virgin Islands with isolated higher amounts possible between 6 and 8 inches. Elsewhere, 1 to 3 inches are expected. Due to already saturated soils, any prolonged period of heavy rainfall will result in urban and small stream flooding. Some rivers will likely overflow their banks. Therefore, Isolated life threatening flash flooding and mudslides are possible as well.
You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.
Satellite imagery and doppler radar indicated both the development of strong thunderstorms across various sections of the local waters. Conditions are likely to deteriorate during the next few hours, lasting through the evening. These thunderstorms are capable of producing winds up to around 30 knots, frequent lightning, and torrential rain. Waterspouts are possible.
Mariners can expect gusty winds to around 30 knots, locally higher waves, and lightning strikes. Boaters should seek safe harbor immediately until these storms pass.
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