Hazardous Weather Outlook
Issued by NWS San Juan, PR

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FLCA42 TJSJ 010740
HWOSJU

Hazardous Weather Outlook
National Weather Service San Juan PR
340 AM AST Fri Aug 1 2025

AMZ711>745-PRZ001>013-020745-
San Juan and Vicinity-Northeast-Southeast-Eastern Interior-
North Central-Central Interior-Ponce and Vicinity-Northwest-
Western Interior-Mayaguez and Vicinity-Southwest-Culebra-Vieques-
The nearshore and off shore Atlantic and Caribbean Coastal Waters-
340 AM AST Fri Aug 1 2025

This Hazardous Weather Outlook is for portions of Puerto Rico.

.DAY ONE...Today and Tonight

.Lightning...Isolated thunderstorms, particularly across
western Puerto Rico in the afternoon. Stay alert and be prepared
to take shelter if storms develop.

.Excessive Rainfall...Flooding in urban areas, roads, small
streams, and washes, particularly across western Puerto Rico in
the afternoon. There is a low chance of isolated flash floods.
Elsewhere, plan for water ponding on roads and in poorly drained
areas.

.Excessive Heat...This level of heat affects most individuals
sensitive to heat, especially those without effective cooling
and/or adequate hydration. Those extremely sensitive to heat face
the highest risk. Some health systems and heat-sensitive
industries could be affected. These conditions are most likely
across most lower elevations and urban areas of Puerto Rico, where
a Heat Advisory is in effect between 10 AM and 4 PM AST.

.Wind...Breezy conditions (18-22 kts | 21-25 mph), particularly
across exposed coastal areas of northern and southern Puerto Rico,
Vieques, and Culebra.. Unsecured items could blow around.

.Marine Conditions...Small craft should exercise caution,
particularly across most local waters.

.Rip Currents...Life-threatening rip currents are possible in the
surf zone, particularly across northwestern Puerto Rico, Culebra,
and selected beaches of eastern Vieques. Isolated stronger rip
currents may occur elsewhere, especially near piers, jetties, and
channels.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Primary hazard risks will gradually shift toward excessive
rainfall over the weekend and into early next week, as a vigorous
tropical wave increases the potential for showers and thunderstorms,
thereby raising the risk of flooding. Breezy to locally windy
conditions will contribute to choppy seas and maintain a moderate
rip current risk through most of the period. A Saharan Air Layer
with minor to moderate concentrations of Saharan dust will bring
hazy skies and drier air early next week.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

$$

AMZ716-726-VIZ001-002-020745-
St. Thomas St. John adjacent Islands-St Croix-
Nearshore Atlantic and adjacent Caribbean Coastal Waters-
340 AM AST Fri Aug 1 2025

This Hazardous Weather Outlook is for portions of USVI.

.DAY ONE...Today and Tonight

.Lightning...Isolated thunderstorms, particularly tonight due to
the arrival of a vigorous tropical wave. Stay alert and be
prepared to take shelter if storms develop.

.Excessive Rainfall...Ponding of water in roads and poorly
drained areas, particularly tonight. There is a low chance of
localized urban and small streams flooding.

.Excessive Heat...This level of heat affects primarily those
individuals extremely sensitive to heat, especially when outdoors
without effective cooling and/or adequate hydration. These
conditions are most likely across all the islands.

.Wind...Breezy conditions (18-22 kts | 21-25 mph), particularly
across all the islands. Unsecured items could blow around.

.Marine Conditions...Small craft should exercise caution,
particularly across most local waters.

.Rip Currents...Life-threatening rip currents are possible in the
surf zone, particularly across St Croix. Isolated stronger rip
currents may occur elsewhere, especially near piers, jetties, and
channels.


.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Primary hazard risks will gradually shift toward excessive
rainfall over the weekend and into early next week, as a vigorous
tropical wave increases the potential for showers and thunderstorms,
thereby raising the risk of flooding. Breezy to locally windy
conditions will contribute to choppy seas and maintain a moderate
rip current risk through most of the period. A Saharan Air Layer
with minor to moderate concentrations of Saharan dust will bring
hazy skies and drier air early next week.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

$$