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National Weather Service Forecast for: San Juan, Puerto Rico  

Updated: 9:48 pm AST Aug 23, 2017 

Hazardous Weather Outlook
 

Overnight

Overnight: Isolated showers.  Mostly clear, with a low around 79. East southeast wind around 7 mph.  Chance of precipitation is 20%.Isolated
Showers

Thursday

Thursday: Isolated showers, then showers likely and possibly a thunderstorm after noon.  Mostly sunny, with a high near 94. Heat index values as high as 107. East wind 7 to 11 mph.  Chance of precipitation is 60%. New rainfall amounts between three quarters and one inch possible. Isolated
Showers then
Showers
Likely
Thursday
Night
Thursday Night: Isolated showers.  Partly cloudy, with a low around 77. East southeast wind 5 to 8 mph.  Chance of precipitation is 20%.Isolated
Showers

Friday

Friday: Scattered showers.  Partly sunny, with a high near 90. Heat index values as high as 102. East wind 8 to 14 mph.  Chance of precipitation is 30%.Scattered
Showers

Friday
Night
Friday Night: Scattered showers, mainly after 2am.  Partly cloudy, with a low around 78. East wind around 10 mph.  Chance of precipitation is 40%.Scattered
Showers

Saturday

Saturday: Scattered showers, mainly before noon.  Mostly sunny, with a high near 90. East wind 10 to 14 mph.  Chance of precipitation is 40%.Scattered
Showers

Saturday
Night
Saturday Night: Partly cloudy, with a low around 77. East southeast wind around 11 mph. Partly Cloudy

Sunday

Sunday: Scattered showers, mainly before 1pm.  Mostly sunny, with a high near 91. East southeast wind 11 to 13 mph.  Chance of precipitation is 30%.Scattered
Showers

Sunday
Night
Sunday Night: Partly cloudy, with a low around 77. East southeast wind around 9 mph. Partly Cloudy

Lo 79 °FHi 94 °FLo 77 °FHi 90 °FLo 78 °FHi 90 °FLo 77 °FHi 91 °FLo 77 °F

National Weather Service Forecast Details

 

 

HARVEY

 

Track

 

Caribbean Sea


GRLevel3 Radar

  [10/10
GRLevel3 radar from NWS station TJUA

 

Local Radar

 

Weather Summary for Puerto Rico

510
AWCA82 TJSJ 232108
RWSPR

Weather Summary for Puerto Rico
National Weather Service San Juan PR
508 PM AST Wed Aug 23 2017

The morning was mostly sunny today with Saharan dust that caused
horizons and hills to sport a milky appearance. Showers developed
over and around the Cordillera Central just before noon and by 2
PM AST thunderstorms were in full swing with heavy rain from
Orocovis to Hormigueros and from Adjuntas to Moca and Aguada. The
highest amounts fell in the tip of northern Adjuntas municipality
with between 4 to 5 inches. Other areas of heavy rain included San
Sebastian, San German, Lares, Utuado, and Morovis with 2 to 3
inches in spots in each.

Most areas had maximum temperatures in the upper 80s although a
few unofficial inland spots near San Juan had 90 to 95 degrees.
East winds were a little more relaxed today but San Juan still saw
12 to 18 mph with a peak wind of 24 mph. Winds were lighter
elsewhere and sea breezes dominated local wind flows.

Showers will end early this evening and are already dieing in
western Puerto Rico. The driest air will move over Puerto Rico
during the mid night hours ahead of a weak trough that will bring
another active round of showers and thunderstorms for western and
interior Puerto Rico Thursday afternoon with urban and small
stream flooding likely. Another weak wave is also expected
Saturday. Highs will range from the low 90s on the northern coasts
around San Juan to the mid 70s in the higher mountains.

Mariners can expect seas between 1 to 4 feet with occasional seas
up to 5 feet and winds of 5 to 15 knots. There is a moderate rip
current risk across the northern beaches in Puerto Rico and
eastern Vieques.

$$

This product is issued around 5 AM and 5 PM each day and weather
conditions may change between issuances. Please verify the status
of any Watches...Warnings or Advisories mentioned in this product.
 

 

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