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FLCA42 TJSJ 171429 AAA
HWOSJU

Hazardous Weather Outlook...UPDATED
National Weather Service San Juan PR
1029 AM AST Thu Jul 17 2025

AMZ711>745-PRZ001>013-180945-
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-
1029 AM AST Thu Jul 17 2025

This Hazardous Weather Outlook is for portions of Puerto Rico.

.DAY ONE...Today and Tonight

.Lightning...Isolated thunderstorms, particularly across the
interior and western sections. Stay alert and be prepared to take
shelter if storms develop.

.Excessive Rainfall...Flooding in urban areas, roads, small
streams, and washes, particularly across the interior, northeast
and western PR. 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 urban and coastal areas of western PR during the morning
and urban and coastal areas of eastern PR later in the afternoon.
Areas without persistent shower activity can reach or remain with
an elevated excessive heat risk.

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

.Marine Conditions...Small craft should exercise caution,
particularly across the Atlantic Ocean.

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

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

An elevated excessive heat threat will continue through at least
early next week across most urban coastal locations. A wet and
unstable weather pattern will increase the risk of flooding and
thunderstorms on Saturday. Breezy conditions and a moderate risk
of rip currents will prevail through much of the forecast period.
A dense Saharan Air Layer will peak on early Friday morning,
promoting hazy skies and reduced visibilities.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is encouraged. Please relay any information
about flooding, winds, waves, and rip currents to the National
Weather Service in San Juan.

$$

AMZ716-726-VIZ001-002-180945-
St. Thomas St. John adjacent Islands-St Croix-
Nearshore Atlantic and adjacent Caribbean Coastal Waters-
1029 AM AST Thu Jul 17 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 the urban coastal locations.

.Marine Conditions...Small craft should exercise caution,
particularly across the Atlantic Waters and Anegada Passage.

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

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

An elevated excessive heat threat will continue through at least
early next week across most urban coastal locations. A wet and
unstable weather pattern will increase the risk of flooding and
thunderstorms on Saturday. Breezy conditions and a moderate risk
of rip currents will prevail through much of the forecast period.
A dense Saharan Air Layer will peak on early Friday morning,
promoting hazy skies and reduced visibilities.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is encouraged. Please relay any information
about flooding, winds, waves, and rip currents to the National
Weather Service in San Juan.

$$