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

30 Miles ESE Unionville NV

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

    NOW until 5:00am Fri

    Heat Advisory

  • Today

    High: 83 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 63. North wind 5 to 15 mph.

    Low: 63 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: Partly sunny, with a high near 81. Breezy, with a northeast wind 5 to 10 mph becoming west 15 to 20 mph in the morning.

    High: 81 °F

    Partly Sunny
    then Partly
    Sunny and
    Breezy

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms before 11pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 54. Breezy, with a west wind 15 to 20 mph becoming northwest 10 to 15 mph in the evening.

    Low: 54 °F

    Chance
    Showers and
    Breezy then
    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 73. West wind 5 to 15 mph.

    High: 73 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 55. West wind 5 to 15 mph becoming north in the evening.

    Low: 55 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 77.

    High: 77 °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 83. Northeast wind 5 to 10 mph becoming northwest in the morning.
Tonight
Partly cloudy, with a low around 63. North wind 5 to 15 mph.
Juneteenth
Partly sunny, with a high near 81. Breezy, with a northeast wind 5 to 10 mph becoming west 15 to 20 mph in the morning.
Friday Night
A 50 percent chance of showers and thunderstorms before 11pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 54. Breezy, with a west wind 15 to 20 mph becoming northwest 10 to 15 mph in the evening.
Saturday
Sunny, with a high near 73. West wind 5 to 15 mph.
Saturday Night
Mostly clear, with a low around 55. West wind 5 to 15 mph becoming north in the evening.
Sunday
Sunny, with a high near 77.
Sunday Night
Mostly clear, with a low around 60.
Monday
Sunny, with a high near 82.
Monday Night
Clear, with a low around 62.
Tuesday
Sunny, with a high near 85.
Tuesday Night
Clear, with a low around 62.
Wednesday
Sunny, with a high near 83.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
30 Miles ESE Unionville NV
 40.34°N 117.55°W (Elev. 6893 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

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation