Frost Advisory
Ends in 6 h 49 min
When
Until 10 AM PDT Saturday.
Where
In Oregon, Tualatin Valley, Central Oregon Coast Range, and Central Oregon Coast Range Lowlands. In Washington, Cowlitz County Lowlands, North Clark County Lowlands, South Washington Cascade Foothills, and Willapa Hills.
Issued for this forecast zone · National Weather Service Portland OR
What, impacts and precautionsHide details
What
Temperatures of 33 to 36 degrees will result in frost formation.
Impacts
Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.
Precautionary actions
Take steps now to protect tender outdoor plants from the cold. Consider temporarily moving outdoor potted plants indoors if they are sensitive to cold temperatures, or temporarily covering sensitive plants with a lightweight cotton fabric (i.e., bedsheets, thin blankets), as this will help retain heat and provide frost protection for your plants.
Areas: Clatsop County Coast; Tillamook County Coast; Central Coast of Oregon; Central Oregon Coast Range Lowlands; Central Oregon Coast Range; Lower Columbia River; Tualatin Valley; Inner Portland Metro; East Portland Metro; Outer Southeast Portland Metro; West Columbia River Gorge of Oregon above 500 ft; Clackamas County Cascade Foothills; Willapa Hills; Cowlitz County Lowlands; North Clark County Lowlands; Inner Vancouver Metro; East Clark County Lowlands; South Washington Cascade Foothills
See it on weather.gov (opens in a new tab)

Observed 2:55 AM PDT at KKLS

Ryderwood, WA weather

Overcast and 39°4°.

Mostly agree

Now 39°4°

Cloudy

Wind: Calm; Light through 3 PM
Dew point: 37°3°; Comfortable
Humidity: 93%; Air 39°4°, dew point 37°3° · fog or dew likely
UV tomorrow: 1Low; Low all day (peak 1)
Air quality: 49Good; Main pollutant: PM2.5 (fine particles)
Pressure: 30.31 inHg1026 hPa; Falling slowly · −0.03 inHg−1.0 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Dry until tonight 2 AM
Below freezing today 6–9 AM (low 32°0°)
Fog today 6–10 AM
Above 50°10° today by noon
Rain tonight from 2 AM (80%, 3 in77 mm)

TonightNear 34°1° · Mostly cloudy
This morningUp to 48°9° by 11 AM · Mostly cloudy · freezing, low 32°0°
This afternoonUp to 61°16° by 3 PM · Mostly cloudy
TonightDown to 37°3° by 5 AM · Rain 2–6 AM (80%)
Tomorrow morningUp to 47°8° by 11 AM · Rain all morning (80%)
Tomorrow afternoonUp to 56°13° by 4 PM · Rain all afternoon (80%)
Tomorrow nightDown to 42°6° by 1 AM · Rain all night (80%)

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 3a	Cloudy	34°1° (likely 34°1° to 41°5°)	34°1°	0%	0 mph0 km/h, gusts 1 mph2 km/h	100%	63%	0
Sat 4a	Cloudy	34°1° (likely 34°1° to 41°5°)	34°1°	0%	0 mph0 km/h, gusts 1 mph2 km/h	100%	76%	0
Sat 5a	Cloudy	33°1° (likely 33°1° to 41°5°)	33°1°	0%	0 mph0 km/h, gusts 1 mph2 km/h	100%	78%	0
Sat 6a	Fog	32°0° (likely 32°0° to 41°5°)	32°0°	0%	0 mph0 km/h, gusts 2 mph3 km/h	100%	80%	0
Sat 7a	Fog	32°0° (likely 32°0° to 41°5°)	32°0°	0%	0 mph0 km/h, gusts 1 mph2 km/h	100%	81%	0
Sat 8a	Fog	32°0° (likely 32°0° to 42°6°)	32°0°	0%	0 mph0 km/h, gusts 1 mph2 km/h	100%	81%	0
Sat 9a	Fog	34°1° (likely 34°1° to 43°6°)	34°1°	0%	0 mph0 km/h, gusts 2 mph3 km/h	100%	76%	0
Sat 10a	Cloudy	42°6° (likely 42°6° to 47°8°)	42°6°	0%	0 mph0 km/h, gusts 2 mph4 km/h	91%	74%	1
Sat 11a	Cloudy	48°9° (likely 47°8° to 51°11°)	48°9°	0%	0 mph0 km/h, gusts 4 mph6 km/h	78%	83%	1
Sat 12p	Cloudy	53°12° (likely 51°11° to 55°13°)	53°12°	0%	0 mph0 km/h, gusts 5 mph9 km/h	69%	83%	1
Sat 1p	Cloudy	57°14° (likely 53°12° to 58°14°)	57°14°	0%	0 mph0 km/h, gusts 7 mph11 km/h	59%	84%	2
Sat 2p	Cloudy	59°15° (likely 55°13° to 61°16°)	59°15°	0%	0 mph0 km/h, gusts 8 mph12 km/h	51%	84%	2
Sat 3p	Cloudy	61°16° (likely 56°13° to 62°17°)	61°16°	0%	0 mph0 km/h, gusts 8 mph13 km/h	47%	83%	1
Sat 4p	Cloudy	61°16° (likely 56°13° to 62°17°)	61°16°	0%	0 mph0 km/h, gusts 7 mph12 km/h	47%	81%	1
Sat 5p	Cloudy	59°15° (likely 55°13° to 60°16°)	59°15°	0%	0 mph0 km/h, gusts 6 mph9 km/h	57%	80%	1
Sat 6p	Cloudy	54°12° (likely 51°11° to 54°12°)	54°12°	0%	0 mph0 km/h, gusts 6 mph10 km/h	71%	76%	0
Sat 7p	Cloudy	50°10° (likely 49°9° to 51°11°)	50°10°	0%	0 mph0 km/h, gusts 6 mph10 km/h	81%	75%	0
Sat 8p	Cloudy	44°7° (likely 44°7° to 50°10°)	44°7°	0%	0 mph0 km/h, gusts 4 mph7 km/h	85%	74%	0
Sat 9p	Cloudy	43°6° (likely 43°6° to 48°9°)	43°6°	0%	0 mph0 km/h, gusts 5 mph8 km/h	85%	75%	0
Sat 10p	Cloudy	41°5° (likely 41°5° to 47°8°)	41°5°	5%	0 mph0 km/h, gusts 4 mph6 km/h	85%	80%	0
Sat 11p	Cloudy	41°5° (likely 41°5° to 47°8°)	41°5°	5%, 0.03 in0.8 mm	1 mph2 km/h from S, gusts 4 mph6 km/h	85%	90%	0
Sun 12a	Cloudy	40°4° (likely 40°4° to 47°8°)	40°4°	10%, 0.03 in0.8 mm	1 mph2 km/h from S, gusts 5 mph8 km/h	86%	85%	0
Sun 1a	Cloudy	39°4° (likely 39°4° to 47°8°)	39°4°	10%, 0.03 in0.8 mm	2 mph3 km/h from SSW, gusts 5 mph9 km/h	87%	89%	0
Sun 2a	Cloudy	39°4° (likely 39°4° to 47°8°)	39°4°	20%, 0.03 in0.8 mm	2 mph3 km/h from S, gusts 5 mph8 km/h	88%	79%	0
Sun 3a	Rain	38°3° (likely 38°3° to 47°8°)	36°2°	20%, 0.03 in0.8 mm	3 mph5 km/h from S, gusts 5 mph8 km/h	89%	84%	0
Sun 4a	Rain	38°3° (likely 38°3° to 47°8°)	36°2°	30%, 0.03 in0.8 mm	3 mph5 km/h from S, gusts 6 mph9 km/h	90%	80%	0
Sun 5a	Rain	37°3° (likely 37°3° to 46°8°)	33°1°	80%, 0.28 in7.1 mm	5 mph8 km/h from S, gusts 6 mph10 km/h	91%	80%	0
Sun 6a	Rain	36°2° (likely 36°2° to 46°8°)	32°0°	80%, 0.28 in7.1 mm	5 mph8 km/h from S, gusts 9 mph14 km/h	91%	80%	0
Sun 7a	Rain	36°2° (likely 36°2° to 47°8°)	32°0°	30%, 0.28 in7.1 mm	5 mph8 km/h from S, gusts 10 mph16 km/h	95%	100%	0
Sun 8a	Rain	36°2° (likely 36°2° to 46°8°)	32°0°	40%, 0.28 in7.1 mm	5 mph8 km/h from SSE, gusts 10 mph17 km/h	96%	100%	0
Sun 9a	Rain	38°3° (likely 38°3° to 48°9°)	34°1°	50%, 0.28 in7.1 mm	5 mph8 km/h from SSE, gusts 16 mph26 km/h	100%	100%	0
Sun 10a	Rain	43°6° (likely 43°6° to 52°11°)	40°4°	40%, 0.28 in7.1 mm	5 mph8 km/h from SSE, gusts 22 mph35 km/h	99%	100%	1
Sun 11a	Rain	47°8° (likely 46°8° to 55°13°)	44°7°	70%, 0.12 in3 mm	6 mph10 km/h from SSE, gusts 23 mph37 km/h	91%	100%	1
Sun 12p	Cloudy	50°10° (likely 47°8° to 57°14°)	48°9°	80%, 0.12 in3 mm	6 mph10 km/h from SSE, gusts 18 mph30 km/h	89%	99%	0
Sun 1p	Cloudy	53°12° (likely 48°9° to 59°15°)	53°12°	80%, 0.12 in3 mm	6 mph10 km/h from SSE, gusts 17 mph27 km/h	83%	90%	0
Sun 2p	Cloudy	54°12° (likely 50°10° to 60°16°)	54°12°	70%, 0.12 in3 mm	6 mph10 km/h from SSE, gusts 18 mph28 km/h	80%	84%	0
Sun 3p	Cloudy	55°13° (likely 50°10° to 60°16°)	55°13°	50%, 0.12 in3 mm	6 mph10 km/h from SSE, gusts 17 mph27 km/h	74%	91%	0
Sun 4p	Cloudy	56°13° (likely 51°11° to 58°14°)	56°13°	50%, 0.12 in3 mm	6 mph10 km/h from SSE, gusts 17 mph27 km/h	74%	87%	1
Sun 5p	Cloudy	54°12° (likely 50°10° to 56°13°)	54°12°	70%, 0.07 in1.8 mm	3 mph5 km/h from SSE, gusts 16 mph26 km/h	84%	88%	0
Sun 6p	Cloudy	51°11° (likely 51°11° to 54°12°)	51°11°	70%, 0.07 in1.8 mm	3 mph5 km/h from SSE, gusts 18 mph28 km/h	95%	83%	0
Sun 7p	Rain	49°9° (likely 49°9° to 53°12°)	48°9°	70%, 0.07 in1.8 mm	3 mph5 km/h from SSE, gusts 21 mph34 km/h	100%	84%	0
Sun 8p	Rain	46°8° (likely 46°8° to 52°11°)	46°8°	70%, 0.07 in1.8 mm	2 mph3 km/h from SSE, gusts 18 mph28 km/h	100%	81%	0
Sun 9p	Cloudy	45°7° (likely 45°7° to 51°11°)	45°7°	70%, 0.07 in1.8 mm	2 mph3 km/h from SSE, gusts 13 mph21 km/h	100%	96%	0
Sun 10p	Rain	44°7° (likely 44°7° to 51°11°)	44°7°	70%, 0.07 in1.8 mm	2 mph3 km/h from SSE, gusts 13 mph21 km/h	100%	96%	0
Sun 11p	Rain	43°6° (likely 43°6° to 51°11°)	39°4°	80%, 0.03 in0.8 mm	6 mph10 km/h from SE, gusts 13 mph21 km/h	99%	99%	0
Mon 12a	Rain	43°6° (likely 43°6° to 51°11°)	39°4°	80%, 0.03 in0.8 mm	6 mph10 km/h from SE, gusts 10 mph15 km/h	99%	91%	0
Mon 1a	Rain	42°6° (likely 42°6° to 50°10°)	38°3°	80%, 0.03 in0.8 mm	6 mph10 km/h from SE, gusts 9 mph14 km/h	100%	97%	0
Mon 2a	Rain	42°6° (likely 42°6° to 50°10°)	40°4°	80%, 0.03 in0.8 mm	3 mph5 km/h from SE, gusts 9 mph14 km/h	100%	98%	0

Days ahead

Tap a day for its hours and the official wording.

Today, Oct 24. Fog. High 61°16°, low 32°0°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Fog, 32°0°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 61°16°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 44°7°
  Dry
4. Overnight
  midnight–6 AM
  Rain, 37°3°
  80% chance · 0.43 in11 mm
Official NWS forecast
Today: Areas of fog before 7am, then widespread frost and areas of fog between 7am and 10am. Mostly cloudy. High near 61, with temperatures falling to around 59 in the afternoon. Wind around 0 mph.
Tonight: Areas of frost and areas of fog. Mostly cloudy, with a low around 32. Wind around 0 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
56°13°–62°17°
Low, likely
32°0°–41°5°
Wind
8 mph13 km/h
UV peak
2
Tomorrow, Oct 25. Rain. High 56°13°, low 39°4°. Rain 0.65 in17 mm, 80% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Rain, 36°2°
  80% chance · 1.5 in39 mm
2. Afternoon
  noon–6 PM
  Cloudy, 56°13°
  80% chance · 0.67 in17 mm
3. Evening
  6 PM–midnight
  Rain, 46°8°
  80% chance · 0.38 in9.7 mm
4. Overnight
  midnight–6 AM
  Rain, 42°6°
  80% chance · 0.16 in4.2 mm
Official NWS forecast
Day: Rain. Cloudy, with a high near 56. South wind around 6 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Night: Rain. Mostly cloudy, with a low around 39. South southeast wind 2 to 6 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
51°11°–60°16°
Low, likely
39°4°–45°7°
Wind
12 mph20 km/h, gusts 30 mph49 km/h
Monday, Oct 26. Rain. High 59°15°, low 38°3°. Rain 0.21 in5.3 mm, 50% chance. Mostly agree.
1. Morning
  6 AM–noon
  Drizzle, 46°8°
  60% chance · 0.04 in0.9 mm
2. Afternoon
  noon–6 PM
  Cloudy, 56°13°
  40% chance · 0.01 in0.3 mm
3. Evening
  6 PM–midnight
  Cloudy, 49°10°
  20% chance
4. Overnight
  midnight–6 AM
  Cloudy, 45°7°
  30% chance · 0.01 in0.3 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain. Mostly cloudy, with a high near 59. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Night: A chance of rain before 8pm, then areas of fog and a chance of rain. Mostly cloudy, with a low around 38.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
54°12°–59°15°
Low, likely
38°3°–47°8°
Wind
8 mph13 km/h, gusts 20 mph31 km/h
UV peak
3
Tuesday, Oct 27. Rain. High 59°15°, low 37°3°. Rain 0.16 in4.1 mm, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Drizzle, 47°8°
  30% chance · 0.05 in1.2 mm
2. Afternoon
  noon–6 PM
  Drizzle, 55°13°
  40% chance
3. Evening
  6 PM–midnight
  Mostly clear, 46°8°
  40% chance · 0.07 in1.8 mm
4. Overnight
  midnight–6 AM
  Drizzle, 45°7°
  60% chance · 0.11 in2.9 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: Patchy fog and a slight chance of rain. Mostly cloudy, with a high near 59.
Night: A chance of rain. Mostly cloudy, with a low around 37.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
53°12°–59°15°
Low, likely
37°3°–46°8°
Wind
9 mph14 km/h, gusts 15 mph24 km/h
UV peak
2
Wednesday, Oct 28. Rain. High 57°14°, low 33°1°. Rain 0.43 in11 mm, 60% chance. Mostly agree.
1. Morning
  6 AM–noon
  Drizzle, 45°7°
  60% chance · 0.09 in2.4 mm
2. Afternoon
  noon–6 PM
  Drizzle, 50°10°
  60% chance · 0.12 in3.1 mm
3. Evening
  6 PM–midnight
  Drizzle, 44°7°
  50% chance · 0.11 in2.8 mm
4. Overnight
  midnight–6 AM
  Rain, 43°6°
  50% chance · 0.16 in4 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: Rain likely. Mostly cloudy, with a high near 57.
Night: A chance of rain. Mostly cloudy, with a low around 33.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
49°9°–57°14°
Low, likely
33°1°–45°7°
Wind
8 mph13 km/h, gusts 20 mph33 km/h
UV peak
2
Thursday, Oct 29. Rain. High 57°14°, low 31°−1°. Rain 0.39 in9.9 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 43°6°
  40% chance · 0.04 in0.9 mm
2. Afternoon
  noon–6 PM
  Drizzle, 49°9°
  40% chance · 0.15 in3.8 mm
3. Evening
  6 PM–midnight
  Drizzle, 44°7°
  30% chance · 0.06 in1.4 mm
4. Overnight
  midnight–6 AM
  Partly cloudy, 42°5°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain. Mostly cloudy, with a high near 57.
Night: A slight chance of rain before 5am. Mostly cloudy, with a low around 31.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
47°8°–57°14°
Low, likely
31°−1°–43°6°
Wind
9 mph15 km/h, gusts 20 mph32 km/h
UV peak
1
Friday, Oct 30. Mostly cloudy. High 57°14°, low 39°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 42°6°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 50°10°
  Dry
3. Evening
  6 PM–midnight
  Drizzle, 43°6°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 37°3°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 57.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
46°8°–57°14°
Low, likely
38°3°–41°5°
Wind
7 mph12 km/h, gusts 17 mph27 km/h
UV peak
3
Saturday, Oct 31. Cloudy. High 51°11°, low 37°3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 38°3°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 51°11°
  Dry
3. Evening
  6 PM–midnight
  Clear, 43°6°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 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
47°8°–56°13°
Low, likely
36°2°–39°4°
Wind
5 mph8 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 50°10°, low 37°3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 38°3°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 49°10°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 44°7°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 41°5°
  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
47°8°–55°13°
Low, likely
34°1°–39°4°
Wind
6 mph10 km/h, gusts 14 mph22 km/h
UV peak
3
Monday, Nov 2. Cloudy. High 54°12°, low 38°3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 44°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 56°13°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 44°7°
  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
49°9°–61°16°
Low, likely
36°2°–41°5°
Wind
9 mph14 km/h, gusts 23 mph37 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 61°, low 32°.
Tomorrow
80% chance of rain, high 56°, low 39°, cooling off.
Monday
49% chance of rain, high 59°, low 38°, warming up.
Rest of week
Highs 50–59°; chance of precipitation on Wednesday.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (PQR) (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

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Cowlitz River at Castle Rock

9.3 mi

Below flood stage

Level: 33.7 ft
Flow: 4,090 cfs

Forecast peak 33.7 ft Sat 5 AM

Reading from Sat 1:30 AM · NWS gauge page

Toutle River at Tower Road near Silver Lake

10 mi

Below flood stage

Level: 120 ft
Flow: 457 cfs

Forecast peak 120 ft Sat 5 AM

Reading from Sat 1:45 AM · NWS gauge page

Cowlitz River at Kelso

17 mi

Below flood stage

Level: 10.0 ft

Forecast peak 10.0 ft Sat 5 AM

Reading from Sat 2:06 AM · NWS gauge page

Newaukum River near Chehalis

18 mi

Below flood stage

Level: 192 ft
Flow: 35 cfs

Forecast peak 193 ft Thu 5 AM

Reading from Sat 1:45 AM · NWS gauge page

Sun & moon

Sun

Daylight: 10 h 27 min; Losing 3 min 3 s a day; shortest Dec 21, 1 h 52 min less
Golden hour: 5:27–6:28 PM; Morning 7:23–8:24 AM
Blue hour: 6:28–6:40 PM; Morning 7:11–7:23 AM; first light 7:11 AM

Stars tonight? Poor

Clouds most of the night (about 76% cover).

Moon

Waxing gibbous

96% lit · growing

Today: sets 5:59 AM · rises 5:11 PM
Full moon: Oct 25
New moon: Nov 8

Looking east from Ryderwood. The highest point on the skyline is about 1,600 ft, 2 mi away.Skyline from USGS elevation data, heights drawn up to 3× taller. Sky, sun and moon as they are now.

1 active weather alert

Frost Advisory

Ryderwood, WA weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Cowlitz River at Castle Rock

Toutle River at Tower Road near Silver Lake

Cowlitz River at Kelso

Newaukum River near Chehalis

Sun & moon

Sun

Stars tonight? Poor

Moon