935
FLCA42 TJSJ 310800
HWOSJU

Hazardous Weather Outlook
National Weather Service San Juan PR
400 AM AST Thu Jul 31 2025

AMZ711>745-PRZ001>013-011000-
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-
400 AM AST Thu Jul 31 2025

This Hazardous Weather Outlook is for portions of Puerto Rico.

.DAY ONE...Today and Tonight

.Lightning...Isolated thunderstorms, particularly across
northwestern 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 northwestern 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 5 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...Friday through Wednesday

Excessive heat concerns are expected to persist throughout the
forecast period. However, 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 may offer limited
relief from the heat but 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 on Friday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

$$

AMZ716-726-VIZ001-002-011000-
St. Thomas St. John adjacent Islands-St Croix-
Nearshore Atlantic and adjacent Caribbean Coastal Waters-
400 AM AST Thu Jul 31 2025

This Hazardous Weather Outlook is for portions of USVI.

.DAY ONE...Today and Tonight

.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 St Thomas, St John, and exposed coastal areas of St Croix.
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...Friday through Wednesday

Excessive heat concerns are expected to persist throughout the
forecast period. However, 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 may offer limited
relief from the heat but 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 on Friday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

$$