Heavy Rainfall and Severe Thunderstorm Threats; Heat Risk Expands; Monitoring the Tropics

Flash flooding risks continue for portions of the Four Corners and Great Basin through today. Severe thunderstorms are outlooked from the eastern Great Lakes, southern New England into the mid-Atlantic through Tuesday. Heat risk increases and expands across the center of the nation and across the Ohio Valley and mid-Atlantic this week. Continue to closely monitor tropical development in the Gulf. Read More >

Current conditions at

Sunnyside Municipal Airport (K1S5)

Lat: 46.3271°NLon: 119.9704°WElev: 768.0ft.

Clear

47°F

8°C

Humidity	90%
Wind Speed	N 0 MPH
Barometer	29.96 in (1014.56 mb)
Dewpoint	44°F (7°C)
Visibility	10.00 mi
Last update	31 Aug 05:15 AM PDT

More Information:

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

Extended Forecast for

Prosser WA

Today
High: 87 °F
Sunny
Tonight
Low: 55 °F
Increasing
Clouds
Tuesday
High: 87 °F
Decreasing
Clouds
Tuesday Night
Low: 52 °F
Chance
Showers
Wednesday
High: 75 °F
Slight Chance
Showers
Wednesday Night
Low: 46 °F
Showers
Likely
Thursday
High: 72 °F
Chance
Showers
Thursday Night
Low: 43 °F
Slight Chance
Showers
Friday
High: 74 °F
Slight Chance
Showers then
Mostly Sunny

Detailed Forecast

Today

Sunny, with a high near 87. Calm wind becoming northeast around 5 mph in the afternoon.

Tonight

Increasing clouds, with a low around 55. Light and variable wind.

Tuesday

Cloudy, then gradually becoming mostly sunny, with a high near 87. Calm wind becoming south around 6 mph in the afternoon.

Tuesday Night

A 30 percent chance of showers after 11pm. Mostly cloudy, with a low around 52. Southwest wind 6 to 9 mph, with gusts as high as 20 mph.

Wednesday

A 20 percent chance of showers after 11am. Partly sunny, with a high near 75. Light southwest wind increasing to 6 to 11 mph in the afternoon. Winds could gust as high as 21 mph.

Wednesday Night

Showers likely. Cloudy, with a low around 46. Chance of precipitation is 70%.

Thursday

A 30 percent chance of showers. Partly sunny, with a high near 72.

Thursday Night

A 20 percent chance of showers. Mostly cloudy, with a low around 43.

Friday

A 20 percent chance of showers before 11am. Mostly sunny, with a high near 74.

Friday Night

Partly cloudy, with a low around 45.

Saturday

Mostly sunny, with a high near 78.