National Weather Service United States Department of Commerce

Heavy rain possible for parts of the northern Rockies & Plains; Severe storms for the Upper Midwest

An unseasonably strong storm system in the northwest U.S. will bring showers and thunderstorms, some heavy, to parts of the northern Rockies and northern Plains through Saturday. Isolated flash floods will be possible in these areas. Some of the storms could be severe in parts of the Dakotas into Minnesota, with large hail and damaging winds.
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Hazardous Weather Conditions

Current Conditions

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Diamond Bar CA

7 Day Forecast

Overnight

Patchy Fog

Patchy
Fog

Low: 65 °F

Saturday

Patchy Fog

Patchy
Fog

High: 86 °F

Saturday
Night

Increasing Clouds

Increasing
Clouds

Low: 64 °F

Sunday

Decreasing Clouds

Decreasing
Clouds

High: 84 °F

Sunday
Night

Patchy Fog

Patchy
Fog

Low: 63 °F

Monday

Patchy Fog

Patchy
Fog

High: 85 °F

Monday
Night

Patchy Fog

Patchy
Fog

Low: 64 °F

Tuesday

Patchy Fog

Patchy
Fog

High: 89 °F

Tuesday
Night

Clear

Clear

Low: 67 °F

Detailed Forecast

  • Overnight Patchy fog. Otherwise, cloudy, with a low around 65. Calm wind.
  • Saturday Patchy fog before 11am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 86. Light south southwest wind becoming west southwest 5 to 10 mph in the afternoon. Winds could gust as high as 15 mph.
  • Saturday Night Increasing clouds, with a low around 64. Southwest wind 5 to 10 mph becoming light south southwest in the evening.
  • Sunday Mostly cloudy, then gradually becoming sunny, with a high near 84. Light south southwest wind becoming west southwest 5 to 10 mph in the afternoon. Winds could gust as high as 15 mph.
  • Sunday Night Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 63. West southwest wind 5 to 10 mph becoming light southwest in the evening. Winds could gust as high as 15 mph.
  • Monday Patchy fog before 11am. Otherwise, partly sunny, with a high near 85.
  • Monday Night Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 64.
  • Tuesday Patchy fog before 11am. Otherwise, mostly sunny, with a high near 89.
  • Tuesday Night Clear, with a low around 67.
  • Wednesday Sunny, with a high near 92.
  • Wednesday Night Mostly clear, with a low around 67.
  • Thursday Sunny, with a high near 93.
  • Thursday Night Partly cloudy, with a low around 67.
  • Friday Mostly sunny, with a high near 92.