Regional Weather Summary
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AWCA82 TJSJ 180843

Weather Summary for Puerto Rico
National Weather Service San Juan PR
443 AM AST Wed Sep 18 2019

Mostly clear to partly cloudy skies prevailed across the eastern
half of Puerto Rico, while variably to mostly cloudy skies
prevailed over the western half due to showers and thunderstorms
that streamed across the local waters to the southwest of the main
island. So far, shower activity nor rainfall accumulations were
reported over land. Overnight low temperatures dropped into the
high 70s to low 80s along coastal areas under a light and variable
surface wind flow.

Shower and thunderstorm activity will continue across the
Caribbean waters and Mona Passage throughout the day. This
activity is forecast to move over portions of the southwestern
quadrant from time-to-time. Increase in cloud cover from this
activity may limit the development of showers over land, but
locally induced activity cannot be ruled out, particularly over
the San Juan metropolitan area and eastern Puerto Rico. Under a
southeasterly surface wind flow peaking at 10-15 mph, daytime high
temperatures are forecast to range between high 80s to low 90s
with heat index possibly into the mid 100s.

Across the regional waters, hazardous marine conditions with seas
up to 7 feet are expected across the Atlantic waters and Anegada
Passage due to a northeasterly swell. As a result, Small Craft
Advisories are in effect. Another larger swell is forecast to
arrive by Thursday from the northwest, generated by Hurricane
Humberto. This will keep hazardous seas through the end of the
week and life threatening rip currents across the west, north and
eastern beaches of the islands.


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conditions may change between issuances. Please verify the status
of any Watches...Warnings or Advisories mentioned in this product. is the U.S. government's official web portal to all federal, state and local government web resources and services.