National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Tropical Storm Arthur and Heavy Rainfall in the South; Severe Weather in the Midwest

An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana tonight. Intense tornadoes, swaths of damaging gusts, and hail in excess of 2 inches in diameter possible. Tropical Storm Arthur will continue to produce strong winds across coastal Upper Texas and Louisiana tonight, as well as potentially life-threatening flooding across southern Louisiana into Mississippi. Read More >

Hazardous Weather Conditions

Current conditions at

SIARD (SIAN2)

Lat: 40.39433°NLon: 117.62567°WElev: 4600.0ft.

NA

65°F

18°C

Humidity 15%
Wind Speed NNE 4 MPH
Barometer NA
Dewpoint 16°F (-9°C)
Visibility NA
Last update 18 Jun 04:38 AM PDT
Extended Forecast for

31 Miles ESE Unionville NV

Fire Weather Watch June 19, 08:00am until June 19, 11:00pm
Heat Advisory June 18, 05:37am until June 19, 05:00am
Click here for hazard details and duration
Fire Weather Watch
Heat Advisory
  •  
    Heat Advisory June 18, 05:37am until June 19, 05:00am

    NOW until 5:00am Fri

    Heat Advisory

  • Today

    High: 88 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 63. Northeast wind 5 to 10 mph.

    Low: 63 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: Partly sunny, with a high near 86. North wind 5 to 15 mph becoming south in the morning. Winds could gust as high as 25 mph.

    High: 86 °F

    Partly Sunny

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms before 11pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 55. Breezy, with a southwest wind 15 to 20 mph becoming southwest 5 to 10 mph after midnight.

    Low: 55 °F

    Chance
    Showers and
    Breezy then
    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 78. Southwest wind 5 to 15 mph.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 56. West wind 5 to 15 mph becoming north in the evening.

    Low: 56 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

Detailed Forecast

Today
Mostly sunny, with a high near 88. Northwest wind 5 to 10 mph.
Tonight
Partly cloudy, with a low around 63. Northeast wind 5 to 10 mph.
Juneteenth
Partly sunny, with a high near 86. North wind 5 to 15 mph becoming south in the morning. Winds could gust as high as 25 mph.
Friday Night
A 40 percent chance of showers and thunderstorms before 11pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 55. Breezy, with a southwest wind 15 to 20 mph becoming southwest 5 to 10 mph after midnight.
Saturday
Sunny, with a high near 78. Southwest wind 5 to 15 mph.
Saturday Night
Mostly clear, with a low around 56. West wind 5 to 15 mph becoming north in the evening.
Sunday
Sunny, with a high near 82.
Sunday Night
Mostly clear, with a low around 60.
Monday
Sunny, with a high near 87.
Monday Night
Clear, with a low around 63.
Tuesday
Sunny, with a high near 90.
Tuesday Night
Clear, with a low around 62.
Wednesday
Sunny, with a high near 89.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
31 Miles ESE Unionville NV
 40.3°N 117.57°W (Elev. 6037 ft)
Last Update:
4:30 am PDT Jun 18, 2026
Forecast Valid:
5am PDT Jun 18, 2026-6pm PDT Jun 24, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation