Columbia River below Priest Rapids Dam
7.7 mi- Level
- 6.2 ft
- Flow
- 38,100 cfs
Forecast peak 13.2 ft Mon 4 AM
Reading from Sat 5:15 AM · NWS gauge page
1 active weather alert
Freeze Warning
Ends in 2 h 43 min
- When
- Until 10 AM PDT Saturday.
- Where
- Clarkston, Moses Lake, Ephrata, Lewiston, Pomeroy, Alpowa Summit, Peck, Gifford, Lewiston Grade, Quincy, Lapwai, Othello, and Culdesac.
Issued for this forecast zone · National Weather Service Spokane WA
What, impacts and precautionsHide details
What
Sub-freezing temperatures as low as 27 to 32 expected.
Impacts
Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
Precautionary actions
Take steps now to protect tender plants from the cold.
Areas: Lewiston Area; Lower Garfield and Asotin Counties; Moses Lake Area
See it on weather.gov (opens in a new tab)
Model estimate for 7:00 AM PDT (no recent station report)
Mattawa, WA weather
Freeze Warning. 35°2° and clear now.
Today: low 36°2° (likely 30°−1° to 39°4°), high 57°14° (likely 54°12° to 57°14°).
Now 35°2°
Clear
- Wind
- Calm
- Up to 5 mph8 km/h through 7 PM
- Dew point
- 30°−1°
- Dry, static shocks likely
- UV index
- 0Low
- Moderate 12–3 PM · peak 3
Next 2 hours
No precipitation expected in the next 2 hours.
From forecast models
Next 48 hours
Good hours for
This morningUp to 47°8° by 11 AM · Partly cloudy
This afternoonUp to 57°14° by 3 PM · Mostly cloudy
TonightDown to 38°3° by 4 AM · Mostly cloudy
Tomorrow morningUp to 50°10° by 11 AM · Mostly cloudy
Tomorrow afternoonUp to 57°14° by 3 PM · rain chance 10% · Mostly cloudy
Tomorrow nightDown to 42°6° by 5 AM · rain chance 20% · Mostly cloudy
| Hour | Conditions | Temperature | Feels like | Precipitation | Wind | Humidity | Cloud cover | UV index |
|---|---|---|---|---|---|---|---|---|
| Sat 7a | Sunny | 35°2° (likely 31°−1° to 40°4°) | 35°2° | 0% | 1 mph2 km/h from E, gusts 3 mph4 km/h | 81% | 13% | 0 |
| Sat 8a | Sunny | 35°2° (likely 30°−1° to 39°4°) | 35°2° | 0% | 1 mph2 km/h from E, gusts 4 mph6 km/h | 85% | 23% | 0 |
| Sat 9a | Cloudy | 39°4° (likely 34°1° to 42°6°) | 39°4° | 0% | 1 mph2 km/h from E, gusts 3 mph6 km/h | 76% | 59% | 0 |
| Sat 10a | Partly sunny | 44°7° (likely 39°4° to 46°8°) | 44°7° | 0% | 2 mph3 km/h from E, gusts 2 mph4 km/h | 65% | 71% | 1 |
| Sat 11a | Partly sunny | 47°8° (likely 45°7° to 49°9°) | 46°8° | 0% | 3 mph5 km/h from SE, gusts 4 mph6 km/h | 56% | 71% | 2 |
| Sat 12p | Cloudy | 51°11° (likely 48°9° to 52°11°) | 51°11° | 0% | 3 mph5 km/h from SE, gusts 5 mph8 km/h | 52% | 63% | 3 |
| Sat 1p | Cloudy | 54°12° (likely 51°11° to 55°13°) | 54°12° | 0% | 3 mph5 km/h from SE, gusts 6 mph9 km/h | 46% | 65% | 3 |
| Sat 2p | Cloudy | 55°13° (likely 53°12° to 56°13°) | 55°13° | 0% | 5 mph8 km/h from SE, gusts 7 mph12 km/h | 44% | 65% | 3 |
| Sat 3p | Partly sunny | 57°14° (likely 54°12° to 57°14°) | 57°14° | 0% | 5 mph8 km/h from SE, gusts 8 mph13 km/h | 41% | 70% | 2 |
| Sat 4p | Partly sunny | 55°13° (likely 54°12° to 57°14°) | 55°13° | 0% | 3 mph5 km/h from SE, gusts 8 mph12 km/h | 42% | 73% | 2 |
| Sat 5p | Cloudy | 55°13° (likely 53°12° to 56°13°) | 55°13° | 0% | 3 mph5 km/h from SE, gusts 7 mph12 km/h | 44% | 76% | 1 |
| Sat 6p | Cloudy | 51°11° (likely 49°9° to 53°12°) | 51°11° | 0% | 2 mph3 km/h from E, gusts 8 mph13 km/h | 58% | 78% | 0 |
| Sat 7p | Cloudy | 45°7° (likely 45°7° to 50°10°) | 45°7° | 0% | 1 mph2 km/h from NE, gusts 6 mph10 km/h | 67% | 77% | 0 |
| Sat 8p | Mostly cloudy | 43°6° (likely 43°6° to 49°9°) | 43°6° | 0% | 1 mph2 km/h from N, gusts 3 mph6 km/h | 73% | 64% | 0 |
| Sat 9p | Mostly cloudy | 42°6° (likely 42°6° to 48°9°) | 42°6° | 0% | 1 mph2 km/h from N, gusts 3 mph5 km/h | 72% | 62% | 0 |
| Sat 10p | Mostly cloudy | 41°5° (likely 41°5° to 47°8°) | 41°5° | 0% | 2 mph3 km/h from N, gusts 4 mph6 km/h | 77% | 70% | 0 |
| Sat 11p | Mostly cloudy | 41°5° (likely 41°5° to 46°8°) | 41°5° | 0% | 2 mph3 km/h from N, gusts 4 mph6 km/h | 76% | 71% | 0 |
| Sun 12a | Mostly cloudy | 40°4° (likely 40°4° to 45°7°) | 40°4° | 0% | 2 mph3 km/h from N, gusts 5 mph7 km/h | 77% | 65% | 0 |
| Sun 1a | Mostly cloudy | 40°4° (likely 39°4° to 45°7°) | 40°4° | 0% | 2 mph3 km/h from N, gusts 6 mph9 km/h | 75% | 69% | 0 |
| Sun 2a | Cloudy | 40°4° (likely 39°4° to 44°7°) | 40°4° | 0% | 2 mph3 km/h from N, gusts 7 mph11 km/h | 75% | 65% | 0 |
| Sun 3a | Mostly cloudy | 40°4° (likely 39°4° to 44°7°) | 40°4° | 0% | 2 mph3 km/h from N, gusts 8 mph12 km/h | 73% | 71% | 0 |
| Sun 4a | Cloudy | 38°3° (likely 38°3° to 43°6°) | 38°3° | 0% | 2 mph3 km/h from N, gusts 7 mph12 km/h | 77% | 73% | 0 |
| Sun 5a | Cloudy | 38°3° (likely 38°3° to 43°6°) | 38°3° | 0% | 2 mph3 km/h from N, gusts 7 mph12 km/h | 79% | 73% | 0 |
| Sun 6a | Cloudy | 37°3° (likely 37°3° to 42°6°) | 37°3° | 0% | 2 mph3 km/h from N, gusts 7 mph12 km/h | 84% | 72% | 0 |
| Sun 7a | Cloudy | 37°3° (likely 37°3° to 41°5°) | 37°3° | 0% | 2 mph3 km/h from N, gusts 7 mph12 km/h | 83% | 71% | 0 |
| Sun 8a | Cloudy | 38°3° (likely 38°3° to 42°6°) | 36°2° | 0% | 3 mph5 km/h from N, gusts 8 mph12 km/h | 85% | 71% | 0 |
| Sun 9a | Cloudy | 41°5° (likely 41°5° to 45°7°) | 39°4° | 0% | 3 mph5 km/h from N, gusts 8 mph12 km/h | 78% | 74% | 0 |
| Sun 10a | Cloudy | 46°8° (likely 45°7° to 49°9°) | 45°7° | 0% | 3 mph5 km/h from N, gusts 8 mph14 km/h | 66% | 77% | 1 |
| Sun 11a | Cloudy | 50°10° (likely 48°9° to 53°12°) | 48°9° | 5% | 6 mph10 km/h from N, gusts 9 mph14 km/h | 57% | 79% | 2 |
| Sun 12p | Cloudy | 53°12° (likely 51°11° to 55°13°) | 53°12° | 5% | 6 mph10 km/h from N, gusts 8 mph12 km/h | 53% | 80% | 3 |
| Sun 1p | Cloudy | 55°13° (likely 53°12° to 57°14°) | 55°13° | 5% | 6 mph10 km/h from N, gusts 6 mph10 km/h | 50% | 81% | 3 |
| Sun 2p | Cloudy | 56°13° (likely 54°12° to 59°15°) | 56°13° | 5% | 5 mph8 km/h from N, gusts 6 mph9 km/h | 48% | 80% | 3 |
| Sun 3p | Cloudy | 57°14° (likely 56°13° to 60°16°) | 57°14° | 5% | 5 mph8 km/h from N, gusts 5 mph8 km/h | 46% | 81% | 2 |
| Sun 4p | Cloudy | 56°13° (likely 56°13° to 61°16°) | 56°13° | 5% | 5 mph8 km/h from N, gusts 5 mph9 km/h | 47% | 84% | 1 |
| Sun 5p | Cloudy | 56°13° (likely 55°13° to 58°14°) | 56°13° | 10% | 3 mph5 km/h from N, gusts 3 mph5 km/h | 52% | 80% | 1 |
| Sun 6p | Cloudy | 52°11° (likely 52°11° to 55°13°) | 52°11° | 10% | 3 mph5 km/h from N, gusts 4 mph6 km/h | 65% | 82% | 0 |
| Sun 7p | Cloudy | 48°9° (likely 48°9° to 52°11°) | 47°8° | 10% | 3 mph5 km/h from N, gusts 4 mph6 km/h | 73% | 41% | 0 |
| Sun 8p | Cloudy | 45°7° (likely 45°7° to 51°11°) | 44°7° | 10% | 3 mph5 km/h from NW, gusts 5 mph8 km/h | 77% | 78% | 0 |
| Sun 9p | Cloudy | 44°7° (likely 44°7° to 50°10°) | 42°6° | 10% | 3 mph5 km/h from NW, gusts 6 mph9 km/h | 79% | 76% | 0 |
| Sun 10p | Cloudy | 44°7° (likely 44°7° to 50°10°) | 42°6° | 10% | 3 mph5 km/h from NW, gusts 8 mph12 km/h | 80% | 67% | 0 |
| Sun 11p | Cloudy | 44°7° (likely 44°7° to 50°10°) | 42°6° | 20% | 3 mph5 km/h from NW, gusts 7 mph11 km/h | 79% | 66% | 0 |
| Mon 12a | Cloudy | 44°7° (likely 44°7° to 50°10°) | 42°6° | 20% | 3 mph5 km/h from NW, gusts 7 mph12 km/h | 79% | 70% | 0 |
| Mon 1a | Showers | 44°7° (likely 44°7° to 49°9°) | 42°6° | 20% | 3 mph5 km/h from NW, gusts 8 mph12 km/h | 78% | 43% | 0 |
| Mon 2a | Clear | 44°7° (likely 44°7° to 49°9°) | 44°7° | 20% | 2 mph3 km/h from NW, gusts 7 mph11 km/h | 78% | 39% | 0 |
| Mon 3a | Cloudy | 43°6° (likely 43°6° to 50°10°) | 43°6° | 20% | 2 mph3 km/h from NW, gusts 7 mph11 km/h | 77% | 77% | 0 |
| Mon 4a | Cloudy | 43°6° (likely 43°6° to 49°9°) | 43°6° | 20% | 2 mph3 km/h from NW, gusts 8 mph14 km/h | 77% | 76% | 0 |
| Mon 5a | Cloudy | 42°6° (likely 42°6° to 50°10°) | 42°6° | 20% | 2 mph3 km/h from NW, gusts 7 mph12 km/h | 78% | 76% | 0 |
| Mon 6a | Showers | 42°6° (likely 42°6° to 50°10°) | 42°6° | 20% | 2 mph3 km/h from NW, gusts 4 mph7 km/h | 82% | 71% | 0 |
Days ahead
Shaded: typical range for these dates (1991–2020)
Today, Oct 24. Cloudy. High 57°14°, low 36°2°. Typical 61°16° / 43°6°. Dry. Mostly agree.
Morning
6 AM–noon
Cloudy, 35°2°Dry
Afternoon
noon–6 PM
Partly sunny, 57°14°Dry
Evening
6 PM–midnight
Mostly cloudy, 43°6°Dry
Overnight
midnight–6 AM
Mostly cloudy, 38°3°Dry
Official NWS forecast
Today: Areas of frost before 9am. Mostly sunny. High near 57, with temperatures falling to around 55 in the afternoon. East wind 1 to 5 mph.
Tonight: Mostly cloudy. Low around 36, with temperatures rising to around 38 overnight. North wind around 2 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 54°12°–57°14°
- Low, likely
- 30°−1°–39°4°
- Typical high / low
- 61°16° / 43°6°
- Wind
- 8 mph13 km/h
- UV peak
- 3
Tomorrow, Oct 25. Cloudy. High 58°14°, low 40°4°. Typical 60°16° / 43°6°. Dry. Mostly agree.
Morning
6 AM–noon
Cloudy, 38°3°Dry
Afternoon
noon–6 PM
Cloudy, 57°14°Dry
Evening
6 PM–midnight
Cloudy, 45°7°Dry
Overnight
midnight–6 AM
Cloudy, 42°6°Dry
Official NWS forecast
Day: Mostly cloudy. High near 58, with temperatures falling to around 56 in the afternoon. North wind 2 to 6 mph.
Night: A slight chance of rain showers after 11pm. Mostly cloudy, with a low around 40. Northwest wind around 3 mph. Chance of precipitation is 20%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 56°13°–61°16°
- Low, likely
- 37°3°–41°5°
- Typical high / low
- 60°16° / 43°6°
- Wind
- 8 mph14 km/h
- UV peak
- 3
Monday, Oct 26. Mostly cloudy. High 59°15°, low 38°3°. Typical 60°16° / 42°6°. Dry. Forecasts differ.
Morning
6 AM–noon
Cloudy, 47°8°20% chance · 0.02 in0.5 mm
Afternoon
noon–6 PM
Cloudy, 57°14°20% chance
Evening
6 PM–midnight
Cloudy, 49°10°Dry
Overnight
midnight–6 AM
Cloudy, 45°7°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain showers before 11am. Partly sunny, with a high near 59. North wind around 5 mph. Chance of precipitation is 20%.
Night: Partly cloudy, with a low around 38.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 53°12°–61°16°
- Low, likely
- 38°3°–47°8°
- Typical high / low
- 60°16° / 42°6°
- Wind
- 8 mph12 km/h
- UV peak
- 3
Tuesday, Oct 27. Partly sunny. High 60°16°, low 37°3°. Typical 59°15° / 42°6°. Dry. Mostly agree. Best day outdoors this week.
Morning
6 AM–noon
Cloudy, 45°7°Dry
Afternoon
noon–6 PM
Cloudy, 61°16°Dry
Evening
6 PM–midnight
Clear, 50°10°Dry
Overnight
midnight–6 AM
Clear, 43°6°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 60.
Night: A chance of rain showers after 5am. Mostly cloudy, with a low around 37. Chance of precipitation is 30%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Best day outdoors this week: the one dry, mild day the forecasts agree on (high 60°16°).
- High, likely
- 59°15°–61°16°
- Low, likely
- 37°3°–46°8°
- Typical high / low
- 59°15° / 42°6°
- Wind
- 12 mph20 km/h, gusts 24 mph39 km/h
- UV peak
- 3
Wednesday, Oct 28. Showers. High 57°14°, low 35°2°. Typical 58°14° / 42°6°. Rain, 30% chance. Mostly agree.
Morning
6 AM–noon
Sunny, 42°5°Dry
Afternoon
noon–6 PM
Sunny, 58°15°Dry
Evening
6 PM–midnight
Partly cloudy, 47°8°Dry
Overnight
midnight–6 AM
Clear, 39°4°20% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain showers. Partly sunny, with a high near 57. Chance of precipitation is 30%.
Night: A chance of rain showers. Mostly cloudy, with a low around 35. Chance of precipitation is 30%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 56°13°–59°15°
- Low, likely
- 35°2°–42°6°
- Typical high / low
- 58°14° / 42°6°
- Wind
- 18 mph29 km/h
- UV peak
- 3
Thursday, Oct 29. Cloudy. High 53°12°, low 33°1°. Typical 58°14° / 41°5°. Rain 0.01 in0.3 mm, 20% chance. Mostly agree.
Morning
6 AM–noon
Cloudy, 36°2°Dry
Afternoon
noon–6 PM
Mostly sunny, 53°12°Dry
Evening
6 PM–midnight
Clear, 45°7°Dry
Overnight
midnight–6 AM
Clear, 39°4°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain showers before 11am. Partly sunny, with a high near 53. Chance of precipitation is 20%.
Night: Partly cloudy, with a low around 33.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 51°11°–55°13°
- Low, likely
- 33°1°–40°4°
- Typical high / low
- 58°14° / 41°5°
- Wind
- 14 mph23 km/h
- UV peak
- 3
Friday, Oct 30. Partly sunny. High 53°12°, low 32°0°. Typical 58°14° / 41°5°. Dry. Forecasts differ.
Morning
6 AM–noon
Sunny, 39°4°Dry
Afternoon
noon–6 PM
Cloudy, 51°11°Dry
Evening
6 PM–midnight
Mostly clear, 42°6°Dry
Overnight
midnight–6 AM
Partly cloudy, 38°3°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 53.
Night: Partly cloudy, with a low around 32.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 48°9°–54°12°
- Low, likely
- 32°0°–41°5°
- Typical high / low
- 58°14° / 41°5°
- Wind
- 10 mph16 km/h, gusts 21 mph34 km/h
- UV peak
- 3
Saturday, Oct 31. Cloudy. High 49°9°, low 36°2°. Typical 57°14° / 41°5°. Dry. Mostly agree.
Morning
6 AM–noon
Mostly sunny, 36°2°Dry
Afternoon
noon–6 PM
Cloudy, 50°10°Dry
Evening
6 PM–midnight
Cloudy, 42°6°Dry
Overnight
midnight–6 AM
Cloudy, 36°2°Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 47°8°–52°11°
- Low, likely
- 29°−2°–41°5°
- Typical high / low
- 57°14° / 41°5°
- Wind
- 10 mph17 km/h, gusts 20 mph32 km/h
- UV peak
- 2
Sunday, Nov 1. Cloudy. High 50°10°, low 37°3°. Typical 56°13° / 40°4°. Dry. Forecasts differ.
Morning
6 AM–noon
Cloudy, 38°3°Dry
Afternoon
noon–6 PM
Sunny, 50°10°Dry
Evening
6 PM–midnight
Partly cloudy, 44°7°Dry
Overnight
midnight–6 AM
Clear, 37°3°Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 45°7°–56°13°
- Low, likely
- 30°−1°–41°5°
- Typical high / low
- 56°13° / 40°4°
- Wind
- 9 mph15 km/h
- UV peak
- 3
Monday, Nov 2. Cloudy. High 52°11°, low 39°4°. Typical 56°13° / 40°4°. Dry. Forecasts differ.
Morning
6 AM–noon
Sunny, 39°4°Dry
Afternoon
noon–6 PM
Partly sunny, 50°10°Dry
Evening
6 PM–midnight
Cloudy, 47°8°Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 46°8°–57°14°
- Low, likely
- 36°2°–41°5°
- Typical high / low
- 56°13° / 40°4°
- Wind
- 9 mph15 km/h
- UV peak
- 3
The outlook
Today
Dry, high 57°, low 36°.
Tomorrow
Dry, high 58°, low 40°.
Monday
Dry, high 59°, low 38°.
Rest of week
Mostly dry, highs 49–60°.
Want the meteorologists’ reasoning? Read the NWS forecast discussion (OTX) (opens in a new tab)
What changed since yesterday
No meaningful changes from yesterday’s forecast.
Radar
Radar data: NOAA MRMS, rendered by forecast.blue
Radar loads when scrolled into view
Rivers
NOAA river gauges within 25 mi
Below flood stage
Columbia River at Wanapum Dam
10 mi- Level
- 566 ft
Reading from Sat 5 AM · NWS gauge page
For your home
What this week’s weather means for heating, cooling, pipes and fresh air.
Heating this week
About 63% less heating than a typical week.
This week 38Typical 101
Heating degree days, base 65°F
Heat-pump hours, next 7 days
- h below 47°F
- 31
- h below 17°F
- 0
- h below 5°F
- 0
47, 17 and 5°F are the test points heat pumps are rated at. About 5 hours are near freezing and damp, when outdoor units defrost more often.
Comfort
Dry air outside (dew point 30°F).
Open the windows?
No stretch in the next few days is comfortable enough outside, by temperature, dew point and air quality.
Is this typical?
Priest Rapids Dam · official normals 1991–2020 · records 1956–2026
Oct 24, today vs a typical year
Today’s expected high is 4°2° colder than typical.
- Normal high / low
- 61°16° / 43°6°
- Forecast high / low
- 57°14° / 36°2°
- Record high
- 73°23° in 1988
- Record low
- 29°−2° in 2002
Last 7 days vs normal
On average 3°2° warmer than normal (daily mean temperature).
- +2°+1°SunOct 18
- ±0°MonOct 19
- +7°+4°TueOct 20
- +1°WedOct 21
- +3°+1°ThuOct 22
- +5°+3°FriOct 23
- —SatOct 24
Mattawa weather by month: normals, records, snow and freeze dates
Sun & moon
Sun
Sunrise 7:30 AM, sunset 5:56 PM.
- Daylight
- 10 h 26 min
- Losing 3 min 8 s a day; shortest Dec 21, 1 h 53 min less
- Golden hour
- 5:13–6:15 PM
- Morning 7:11–8:13 AM
- Blue hour
- 6:15–6:27 PM
- Morning 6:59–7:11 AM; first light 6:59 AM
Stars tonight? Poor
Clouds most of the night (about 70% cover).
Moon
Waxing gibbous
97% lit · growing
- Today
- sets 5:46 AM · rises 4:57 PM
- Full moon
- Oct 25
- New moon
- Nov 8
