Area Forecast Discussion
Issued by NWS San Juan, PR

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FXCA62 TJSJ 251219 AAA

Area Forecast Discussion...UPDATED
National Weather Service San Juan PR
819 AM AST Mon Sep 25 2017

.AVIATION...A tropical wave will move westward across the area
with associated convection mainly affecting the U.S. Virgin
Islands this morning. Additional seabreeze convection will be
possible over Puerto Rico this afternoon with locally heavy
rainfall possible. VFR conditions will generally prevail outside
of thunderstorm activity.


.PREV DISCUSSION... /issued Issued by National Weather Service Miami FL/

Deep tropical moisture remains in place across the region with
southeast wind flow. Precipitable water values will remain over 2
inches today. A weak tropical wave will move over the islands today
through the afternoon on Tuesday increasing the rain chances.

Heat Index values will be near 100 for the next few days, bringing
hot and sticky weather to the area. This will make recovery
efforts difficult and overall living unpleasant as electricity
remains out across the island.

Relatively drier conditions are expected by late Tuesday as a SAL
layer will move into the area precipitable water values drop below 2
inches. This will decrease the POPs for the middle part of the week.
Flow will be easterly and POPs will be around climatological normals
for the weekend.

Southeast winds will continue through Monday night. Scattered
showers and thunderstorms will move in from the east today. Winds
will increase around and showers and thunderstorms that do
develop. Tuesday winds will be more easterly.


SJU  86  80  86  80 /  40  50  30  20
STT  82  82  83  82 /  50  50  30  20


PR...High Rip Current Risk until 8 PM AST this evening for Mayaguez
     and Vicinity-North Central-Northeast-Northwest-Ponce and
     Vicinity-San Juan and Vicinity-Southeast-Southwest-Western

AM...High Rip Current Risk until 8 PM AST this evening for Coastal
     Waters OF Southwestern Puerto Rico out 10 NM.



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