Hazardous Weather Outlook
Issued by NWS San Juan, PR

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FLCA42 TJSJ 160839 CCA
HWOSJU

Hazardous Weather Outlook...CORRECTED
National Weather Service San Juan PR
439 AM AST Thu Sep 16 2021

AMZ710>745-PRZ001>013-170845-
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-
439 AM AST Thu Sep 16 2021

This Hazardous Weather Outlook is for Puerto Rico and the adjacent
Atlantic Coastal Waters.

.Day One...Today and Tonight

.Thunderstorms...There is a chance of thunderstorms with heavy
rainfall and brief gusty winds today. Intense thunderstorms over the
interior and west sections could produce strong gusty winds.

.Flooding...Heavy rains could lead to urban and small stream flooding
as well a ponding of water on roads and in poor drainage areas.

.Heat...Southeasterly trade winds will result in elevated heat
indices between 100 and 107 degrees across most of the lower
elevations areas, with the highest heat indices expected across the
coastal areas of northern Puerto Rico.

.Days Two through Seven...Friday through Wednesday

Afternoon thunderstorm activity expected at least through Saturday
and therefore there will remain a slight and moderate threat for
urban and small stream flooding mainly over western PR. The heat
threat is expected to continue over the forecast area with maximum
heat index values in the low 100s at least through Saturday.

.Spotter information statement...

Spotter activation is not anticipated. Please relay any information
about winds, waves, and rip currents to the National Weather Service
in San Juan while following all local and state guidelines.

$$

AMZ715-725-VIZ001-002-170845-
St. Thomas St. John adjacent Islands-St Croix-
Nearshore Atlantic and adjacent Caribbean Coastal Waters-
439 AM AST Thu Sep 16 2021

This Hazardous Weather Outlook is for the U.S. Virgin Islands and the
adjacent Coastal Waters.

.Day One...Today and Tonight

.Thunderstorms...There is a chance of isolated thunderstorms with
heavy rainfall and brief gusty winds in and around the islands
during the early morning hours.

.Flooding...Some early morning passing showers may produce moderate to
heavy rains which may cause minor ponding of water on roads and in
poor drainage areas.

.Heat...Southeasterly trade winds will result in elevated heat
indices between 100 and 102 degrees mainly along portions of the
north and south coastal areas.

.Days Two through Seven...Friday through Wednesday

Afternoon shower and isolated thunderstorm development expected
at least through Saturday, and the moderate to heavy rains may
cause minor ponding of water on roads and in poor drainage areas.
The heat threat is expected to continue over the forecast area
with maximum heat index values in the low 100s at least through
Saturday.

.Spotter information statement...

Spotter activation is not anticipated. Please relay any information
about winds, waves, and rip currents to the National Weather Service
in San Juan while following all local and state guidelines.

$$


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