Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Current conditions at

US30 EB at Lewis/Clark Br HWY2W MP48.68 (ODT93)

Lat: 46.09595° N Lon: 122.96919° W Elev: 36.0 ft.

NA

42°F

6°C

Humidity 75%
Wind Speed W 4 MPH
Barometer NA
Dewpoint 35°F (2°C)
Visibility NA
Wind Chill40°F (4°C)
Last update 21 Mar 10:56 PM PDT
Detailed forecast for

Lower Columbia River

Tonight
Mostly clear. Areas of frost after midnight. Lows in the lower 30s. Northwest wind 5 to 10 mph this evening, becoming light and variable.
Sunday
Widespread frost in the morning. Mostly sunny. Highs in the upper 50s. Winds light.
Sunday Night
Mostly cloudy. Areas of frost after midnight. Lows in the mid 30s. North wind 5 to 10 mph.
Monday
Partly sunny in the morning, then becoming mostly cloudy. Areas of frost in the morning. Highs in the upper 50s. Winds light.
Monday Night
Showers after midnight. Lows in the mid 40s. Winds light. Chance of rain near 100 percent.
Tuesday
Showers. Highs in the mid 50s. Chance of rain near 100 percent.
Tuesday Night
Rain. Lows in the lower 40s. Chance of rain 90 percent.
Wednesday
Rain. Highs in the mid 50s. Chance of rain 90 percent.
Wednesday Night
Mostly cloudy in the evening, then becoming partly cloudy. A 50 percent chance of rain. Lows in the mid 30s.
Thursday
Mostly sunny with a 40 percent chance of rain. Highs in the mid 50s.
Thursday Night
Partly cloudy in the evening, then clearing. Lows in the mid 30s.
Friday
Mostly sunny. Highs in the lower 60s.
Friday Night
Mostly clear. Lows in the upper 30s.
Saturday
Mostly sunny with a 20 percent chance of rain. Highs in the lower 60s.



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502 PM PDT Sat Mar 21 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database