Tracking a Winter Storm; Unusual Early-Season Heat Wave in the Southwest

A major winter storm will organize across the Northern Plains today and then rapidly strengthen as it moves into the Great Lakes on Sunday. Heavy snow and blowing snow are likely to persist over the Great Lakes into Monday night. Dry and gusty winds will produce a critical fire risk across the central/southern Plains. An early heatwave will begin to intensify over the western U.S. into next week. Read More >

Current conditions at

San Juan, Luis Munoz Marin International Airport (TJSJ)

Lat: 18.45°NLon: 66°WElev: 10ft.

Partly Cloudy

73°F

23°C

Humidity 89%
Wind Speed SE 3 mph
Barometer 30.01 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 15 Mar 3:56 am AST
Extended Forecast for

3 Miles NE Comerio PR

  • Overnight

    Overnight: Isolated showers.  Partly cloudy, with a low around 67. Light east wind.  Chance of precipitation is 10%.

    Low: 67 °F

    Isolated
    Showers

  • Sunday

    Sunday: Scattered showers, mainly between 9am and 3pm.  Mostly sunny, with a high near 77. East wind 7 to 14 mph.  Chance of precipitation is 40%.

    High: 77 °F

    Scattered
    Showers

  • Sunday Night

    Sunday Night: Scattered showers, mainly between 9pm and midnight.  Partly cloudy, with a low around 68. East wind 5 to 9 mph.  Chance of precipitation is 30%.

    Low: 68 °F

    Scattered
    Showers

  • Monday

    Monday: Isolated showers.  Mostly sunny, with a high near 77. East wind 10 to 16 mph, with gusts as high as 21 mph.  Chance of precipitation is 20%.

    High: 77 °F

    Isolated
    Showers

  • Monday Night

    Monday Night: Isolated showers after midnight.  Mostly clear, with a low around 67. East wind 5 to 8 mph.  Chance of precipitation is 10%.

    Low: 67 °F

    Mostly Clear
    then Isolated
    Showers

  • Tuesday

    Tuesday: Isolated showers.  Mostly sunny, with a high near 77. East wind 9 to 14 mph.  Chance of precipitation is 20%.

    High: 77 °F

    Isolated
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 67. East wind around 5 mph becoming calm  after midnight.

    Low: 67 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Scattered showers, mainly after noon.  Mostly sunny, with a high near 78. East wind 7 to 13 mph.  Chance of precipitation is 30%.

    High: 78 °F

    Mostly Sunny
    then
    Scattered
    Showers

  • Wednesday Night

    Wednesday Night: Scattered showers.  Mostly cloudy, with a low around 66. Light east wind.  Chance of precipitation is 40%.

    Low: 66 °F

    Scattered
    Showers

Detailed Forecast

Overnight
Isolated showers. Partly cloudy, with a low around 67. Light east wind. Chance of precipitation is 10%.
Sunday
Scattered showers, mainly between 9am and 3pm. Mostly sunny, with a high near 77. East wind 7 to 14 mph. Chance of precipitation is 40%.
Sunday Night
Scattered showers, mainly between 9pm and midnight. Partly cloudy, with a low around 68. East wind 5 to 9 mph. Chance of precipitation is 30%.
Monday
Isolated showers. Mostly sunny, with a high near 77. East wind 10 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Monday Night
Isolated showers after midnight. Mostly clear, with a low around 67. East wind 5 to 8 mph. Chance of precipitation is 10%.
Tuesday
Isolated showers. Mostly sunny, with a high near 77. East wind 9 to 14 mph. Chance of precipitation is 20%.
Tuesday Night
Partly cloudy, with a low around 67. East wind around 5 mph becoming calm after midnight.
Wednesday
Scattered showers, mainly after noon. Mostly sunny, with a high near 78. East wind 7 to 13 mph. Chance of precipitation is 30%.
Wednesday Night
Scattered showers. Mostly cloudy, with a low around 66. Light east wind. Chance of precipitation is 40%.
Thursday
Scattered showers, mainly after noon. Mostly sunny, with a high near 78. Chance of precipitation is 30%.
Thursday Night
Scattered showers. Partly cloudy, with a low around 66. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 78.
Friday Night
Partly cloudy, with a low around 66.
Saturday
Mostly sunny, with a high near 78.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NE Comerio PR
 18.24°N 66.2°W (Elev. 1650 ft)
3:48 am AST Mar 15, 2026
4am AST Mar 15, 2026-6pm AST Mar 21, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database