Heavy Rainfall and Severe Thunderstorm Threats for the Plains and Southeast

A frontal boundary extending from the western High Plains to the Southeast will focus additional showers and thunderstorms this weekend. Some of these storms may become severe, alongside frequent lightning, and isolated instances of flash flooding. Meanwhile dry conditions will continue for the Great Basin where fire weather concerns linger. For the mid-Atlantic and Northeast, seasonable weather. Read More >

Hazardous Weather Conditions

Current conditions at

San Juan, Luis Munoz Marin International Airport (TJSJ)

Lat: 18.45°NLon: 66°WElev: 10ft.

Partly Cloudy

91°F

33°C

Humidity	56%
Wind Speed	SE 9 mph
Barometer	30.04 in
Dewpoint	73°F (23°C)
Visibility	10.00 mi
Heat Index	100°F (38°C)
Last update	3 Aug 11:56 am AST

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Humacao PR

Extreme Heat Warning until August 3, 04:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning until August 3, 04:00pm
NOW until 4:00pm Sun
Extreme Heat Warning
This Afternoon
High: 90 °F
Showers
Likely
Tonight
Low: 77 °F
Scattered
Showers
Monday
High: 90 °F
Scattered
Showers
Monday Night
Low: 77 °F
Scattered
Showers
Tuesday
High: 91 °F
Scattered
Showers
Tuesday Night
Low: 76 °F
Scattered
Showers
Wednesday
High: 90 °F
Scattered
Showers
Wednesday Night
Low: 76 °F
Partly Cloudy

Detailed Forecast

This Afternoon

Showers likely and possibly a thunderstorm before 3pm, then scattered showers and thunderstorms after 3pm. Mostly cloudy, with a high near 90. Heat index values as high as 105. East southeast wind around 11 mph. Chance of precipitation is 60%.

Tonight

Scattered showers and thunderstorms. Mostly cloudy, with a low around 77. East wind around 10 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.

Monday

Scattered showers, mainly before 3pm. Widespread haze after 3pm. Mostly sunny, with a high near 90. Heat index values as high as 105. East wind 9 to 14 mph. Chance of precipitation is 40%.

Monday Night

Scattered showers. Partly cloudy, with a low around 77. East northeast wind around 10 mph. Chance of precipitation is 30%.

Tuesday

Scattered showers, mainly after noon. Mostly sunny, with a high near 91. East northeast wind 9 to 13 mph. Chance of precipitation is 40%.

Tuesday Night

Scattered showers and thunderstorms. Mostly cloudy, with a low around 76. Northeast wind 6 to 8 mph. Chance of precipitation is 50%.

Wednesday

Scattered showers. Partly sunny, with a high near 90. East wind 7 to 10 mph. Chance of precipitation is 40%.

Wednesday Night

Partly cloudy, with a low around 76. East wind around 7 mph.

Thursday

Scattered showers. Mostly sunny, with a high near 90. East wind around 9 mph. Chance of precipitation is 30%.