Chehalis River at Porter
1.7 mi- Level
- 30.5 ft
- Flow
- 336 cfs
Forecast peak 30.6 ft Mon 5 AM
Reading from Sat 6:45 AM · NWS gauge page
Appearance
Observed 7:45 AM PDT at KOLM
Sunny and 30°−1°, rain tomorrow ~1–4 AM (83%).
Today: low 38°3° (likely 37°3° to 40°4°), high 61°16° (likely 55°13° to 61°16°).
Now 30°−1°
Sunny
No precipitation expected in the next 2 hours.
From forecast models
| Hour | Conditions | Temperature | Feels like | Precipitation | Wind | Humidity | Cloud cover | UV index |
|---|---|---|---|---|---|---|---|---|
| Sat 8a | Cloudy | 34°1° (likely 34°1° to 40°4°) | 34°1° | 5% | 0 mph0 km/h, gusts 2 mph3 km/h | 97% | 82% | 0 |
| Sat 9a | Cloudy | 37°3° (likely 37°3° to 43°6°) | 37°3° | 5% | 0 mph0 km/h, gusts 3 mph5 km/h | 94% | 81% | 0 |
| Sat 10a | Cloudy | 45°7° (likely 44°7° to 47°8°) | 45°7° | 5% | 0 mph0 km/h, gusts 4 mph7 km/h | 89% | 79% | 1 |
| Sat 11a | Cloudy | 52°11° (likely 47°8° to 52°11°) | 52°11° | 5% | 0 mph0 km/h, gusts 7 mph11 km/h | 75% | 79% | 1 |
| Sat 12p | Cloudy | 55°13° (likely 50°10° to 55°13°) | 55°13° | 5% | 0 mph0 km/h, gusts 6 mph9 km/h | 66% | 79% | 2 |
| Sat 1p | Cloudy | 58°14° (likely 52°11° to 58°14°) | 58°14° | 5% | 0 mph0 km/h, gusts 7 mph12 km/h | 60% | 82% | 2 |
| Sat 2p | Cloudy | 59°15° (likely 54°12° to 59°15°) | 59°15° | 5% | 0 mph0 km/h, gusts 7 mph11 km/h | 57% | 85% | 2 |
| Sat 3p | Cloudy | 60°16° (likely 54°12° to 60°16°) | 60°16° | 5% | 0 mph0 km/h, gusts 8 mph13 km/h | 56% | 88% | 2 |
| Sat 4p | Cloudy | 61°16° (likely 55°13° to 61°16°) | 61°16° | 5% | 0 mph0 km/h, gusts 7 mph12 km/h | 54% | 86% | 2 |
| Sat 5p | Cloudy | 58°14° (likely 53°12° to 58°14°) | 58°14° | 5%, 0.01 in0.3 mm | 0 mph0 km/h, gusts 5 mph9 km/h | 60% | 79% | 1 |
| Sat 6p | Cloudy | 54°12° (likely 50°10° to 54°12°) | 54°12° | 5%, 0.01 in0.3 mm | 0 mph0 km/h, gusts 4 mph6 km/h | 73% | 81% | 0 |
| Sat 7p | Cloudy | 50°10° (likely 47°8° to 51°11°) | 50°10° | 5%, 0.01 in0.3 mm | 0 mph0 km/h, gusts 3 mph4 km/h | 87% | 82% | 0 |
| Sat 8p | Cloudy | 45°7° (likely 45°7° to 49°9°) | 45°7° | 10%, 0.01 in0.3 mm | 0 mph0 km/h, gusts 3 mph5 km/h | 92% | 84% | 0 |
| Sat 9p | Cloudy | 43°6° (likely 43°6° to 48°9°) | 43°6° | 20%, 0.01 in0.3 mm | 0 mph0 km/h, gusts 4 mph6 km/h | 93% | 84% | 0 |
| Sat 10p | Cloudy | 42°6° (likely 42°6° to 48°9°) | 42°6° | 20%, 0.01 in0.3 mm | 0 mph0 km/h, gusts 4 mph6 km/h | 93% | 90% | 0 |
| Sat 11p | Cloudy | 42°6° (likely 42°6° to 47°8°) | 42°6° | 30%, 0.15 in3.8 mm | 0 mph0 km/h, gusts 5 mph8 km/h | 91% | 90% | 0 |
| Sun 12a | Rain | 41°5° (likely 41°5° to 47°8°) | 41°5° | 40%, 0.15 in3.8 mm | 0 mph0 km/h, gusts 6 mph10 km/h | 90% | 94% | 0 |
| Sun 1a | Cloudy | 41°5° (likely 41°5° to 49°9°) | 41°5° | 40%, 0.15 in3.8 mm | 1 mph2 km/h from SE, gusts 10 mph17 km/h | 89% | 99% | 0 |
| Sun 2a | Cloudy | 41°5° (likely 41°5° to 50°10°) | 41°5° | 50%, 0.15 in3.8 mm | 1 mph2 km/h from SE, gusts 11 mph18 km/h | 88% | 99% | 0 |
| Sun 3a | Rain | 41°5° (likely 41°5° to 52°11°) | 41°5° | 50%, 0.15 in3.8 mm | 1 mph2 km/h from SE, gusts 15 mph24 km/h | 90% | 97% | 0 |
| Sun 4a | Rain | 40°4° (likely 40°4° to 52°11°) | 40°4° | 60%, 0.15 in3.8 mm | 2 mph3 km/h from SE, gusts 14 mph23 km/h | 92% | 100% | 0 |
| Sun 5a | Rain | 40°4° (likely 40°4° to 48°9°) | 40°4° | 80%, 0.2 in5.1 mm | 2 mph3 km/h from SE, gusts 7 mph11 km/h | 93% | 100% | 0 |
| Sun 6a | Rain | 40°4° (likely 40°4° to 48°9°) | 40°4° | 80%, 0.2 in5.1 mm | 2 mph3 km/h from SE, gusts 13 mph22 km/h | 93% | 100% | 0 |
| Sun 7a | Rain | 39°4° (likely 39°4° to 48°9°) | 39°4° | 70%, 0.2 in5.1 mm | 2 mph3 km/h from SE, gusts 15 mph25 km/h | 92% | 100% | 0 |
| Sun 8a | Rain | 40°4° (likely 40°4° to 49°9°) | 38°3° | 70%, 0.2 in5.1 mm | 3 mph5 km/h from SE, gusts 20 mph32 km/h | 96% | 100% | 0 |
| Sun 9a | Rain | 40°4° (likely 40°4° to 50°10°) | 38°3° | 80%, 0.2 in5.1 mm | 3 mph5 km/h from SE, gusts 19 mph30 km/h | 100% | 97% | 0 |
| Sun 10a | Rain | 46°8° (likely 46°8° to 50°10°) | 45°7° | 70%, 0.2 in5.1 mm | 3 mph5 km/h from SE, gusts 20 mph32 km/h | 98% | 93% | 0 |
| Sun 11a | Drizzle | 51°11° (likely 47°8° to 51°11°) | 51°11° | 70%, 0.1 in2.5 mm | 6 mph10 km/h from SE, gusts 20 mph32 km/h | 88% | 90% | 0 |
| Sun 12p | Rain | 53°12° (likely 49°9° to 53°12°) | 53°12° | 70%, 0.1 in2.5 mm | 6 mph10 km/h from SE, gusts 22 mph36 km/h | 82% | 91% | 0 |
| Sun 1p | Rain | 55°13° (likely 50°10° to 55°13°) | 55°13° | 60%, 0.1 in2.5 mm | 6 mph10 km/h from SE, gusts 22 mph35 km/h | 79% | 53% | 0 |
| Sun 2p | Mostly sunny | 55°13° (likely 51°11° to 55°13°) | 55°13° | 50%, 0.1 in2.5 mm | 5 mph8 km/h from SE, gusts 20 mph33 km/h | 78% | 56% | 1 |
| Sun 3p | Cloudy | 56°13° (likely 51°11° to 56°13°) | 56°13° | 50%, 0.1 in2.5 mm | 5 mph8 km/h from SE, gusts 20 mph32 km/h | 77% | 91% | 0 |
| Sun 4p | Cloudy | 57°14° (likely 51°11° to 57°14°) | 57°14° | 40%, 0.1 in2.5 mm | 5 mph8 km/h from SE, gusts 21 mph34 km/h | 77% | 75% | 1 |
| Sun 5p | Rain | 55°13° (likely 51°11° to 55°13°) | 55°13° | 70%, 0.06 in1.5 mm | 3 mph5 km/h from SE, gusts 23 mph38 km/h | 83% | 76% | 0 |
| Sun 6p | Cloudy | 52°11° (likely 50°10° to 52°11°) | 52°11° | 70%, 0.06 in1.5 mm | 3 mph5 km/h from SE, gusts 20 mph33 km/h | 92% | 90% | 0 |
| Sun 7p | Rain | 49°9° (likely 49°9° to 51°11°) | 48°9° | 70%, 0.06 in1.5 mm | 3 mph5 km/h from SE, gusts 17 mph27 km/h | 98% | 79% | 0 |
| Sun 8p | Rain | 46°8° (likely 46°8° to 51°11°) | 46°8° | 70%, 0.06 in1.5 mm | 2 mph3 km/h from ESE, gusts 16 mph26 km/h | 100% | 74% | 0 |
| Sun 9p | Cloudy | 45°7° (likely 45°7° to 51°11°) | 45°7° | 70%, 0.06 in1.5 mm | 2 mph3 km/h from ESE, gusts 18 mph28 km/h | 100% | 93% | 0 |
| Sun 10p | Rain | 45°7° (likely 45°7° to 51°11°) | 45°7° | 70%, 0.06 in1.5 mm | 2 mph3 km/h from ESE, gusts 21 mph34 km/h | 100% | 94% | 0 |
| Sun 11p | Drizzle | 45°7° (likely 45°7° to 51°11°) | 44°7° | 80%, 0.04 in1 mm | 3 mph5 km/h from E, gusts 23 mph37 km/h | 99% | 98% | 0 |
| Mon 12a | Cloudy | 45°7° (likely 45°7° to 50°10°) | 43°6° | 80%, 0.04 in1 mm | 3 mph5 km/h from E, gusts 23 mph37 km/h | 98% | 99% | 0 |
| Mon 1a | Cloudy | 44°7° (likely 44°7° to 50°10°) | 43°6° | 80%, 0.04 in1 mm | 3 mph5 km/h from E, gusts 21 mph35 km/h | 97% | 99% | 0 |
| Mon 2a | Cloudy | 44°7° (likely 44°7° to 50°10°) | 42°6° | 80%, 0.04 in1 mm | 3 mph5 km/h from E, gusts 20 mph33 km/h | 97% | 99% | 0 |
| Mon 3a | Rain | 44°7° (likely 44°7° to 50°10°) | 42°6° | 80%, 0.04 in1 mm | 3 mph5 km/h from E, gusts 18 mph29 km/h | 97% | 86% | 0 |
| Mon 4a | Rain | 43°6° (likely 43°6° to 49°9°) | 42°6° | 80%, 0.04 in1 mm | 3 mph5 km/h from E, gusts 17 mph27 km/h | 98% | 99% | 0 |
| Mon 5a | Rain | 43°6° (likely 43°6° to 49°9°) | 43°6° | 30%, 0.01 in0.3 mm | 2 mph3 km/h from E, gusts 15 mph24 km/h | 98% | 88% | 0 |
| Mon 6a | Rain | 42°6° (likely 42°6° to 49°9°) | 42°6° | 30%, 0.01 in0.3 mm | 2 mph3 km/h from E, gusts 10 mph17 km/h | 99% | 91% | 0 |
| Mon 7a | Rain | 41°5° (likely 41°5° to 48°9°) | 41°5° | 30%, 0.01 in0.3 mm | 2 mph3 km/h from E, gusts 10 mph16 km/h | 99% | 96% | 0 |
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
30% chance · 0.2 in5.1 mm
Overnight
midnight–6 AM
80% chance · 0.95 in24 mm
Official NWS forecast
Today: Mostly cloudy. High near 61, with temperatures falling to around 58 in the afternoon. Wind around 0 mph. New rainfall amounts less than a tenth of an inch possible.
Tonight: Rain after 9pm. Mostly cloudy. Low around 38, with temperatures rising to around 40 overnight. East southeast wind around 2 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
80% chance · 1.1 in28 mm
Afternoon
noon–6 PM
70% chance · 0.56 in14 mm
Evening
6 PM–midnight
80% chance · 0.34 in8.6 mm
Overnight
midnight–6 AM
80% chance · 0.21 in5.3 mm
Official NWS forecast
Day: Rain. Mostly cloudy. High near 57, with temperatures falling to around 55 in the afternoon. Southeast wind 2 to 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 41. East southeast wind around 3 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
40% chance · 0.03 in0.7 mm
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain before 5pm. Partly sunny, with a high near 61. East northeast wind 0 to 3 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Night: Mostly cloudy, with a low around 38.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
30% chance · 0.05 in1.3 mm
Evening
6 PM–midnight
40% chance · 0.09 in2.3 mm
Overnight
midnight–6 AM
80% chance · 0.17 in4.3 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain after 11am. Mostly cloudy, with a high near 61.
Night: A chance of rain. Mostly cloudy, with a low around 38.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
60% chance · 0.09 in2.4 mm
Afternoon
noon–6 PM
80% chance · 0.18 in4.5 mm
Evening
6 PM–midnight
70% chance · 0.06 in1.5 mm
Overnight
midnight–6 AM
50% chance · 0.03 in0.8 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.
Night: A chance of rain. Mostly cloudy, with a low around 36.
Forecasts agreeIndependent forecasts are close; the range is narrow.
Morning
6 AM–noon
40% chance · 0.06 in1.5 mm
Afternoon
noon–6 PM
50% chance · 0.12 in3 mm
Evening
6 PM–midnight
40% chance · 0.1 in2.4 mm
Overnight
midnight–6 AM
30% chance · 0.12 in3.1 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain. Partly sunny, with a high near 59.
Night: A slight chance of rain before 11pm. Mostly cloudy, with a low around 35.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain between 11am and 5pm. Partly sunny, with a high near 60.
Night: Partly cloudy, with a low around 34.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
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 agreeIndependent forecasts are close; the range is narrow.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
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.
Morning
6 AM–noon
20% chance · 0.02 in0.4 mm
Afternoon
noon–6 PM
30% chance
Evening
6 PM–midnight
30% chance
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.
Dry, high 61°, low 38°.
82% chance of rain, high 57°, low 41°, cooling off.
Dry, high 61°, low 38°, warming up.
Highs 49–61°; chance of precipitation on Wednesday.
Want the meteorologists’ reasoning? Read the NWS forecast discussion (SEW) (opens in a new tab)
No meaningful changes from yesterday’s forecast.
Forecast peak 30.6 ft Mon 5 AM
Reading from Sat 6:45 AM · NWS gauge page
Forecast peak 27.9 ft Mon 11 AM
Reading from Sat 7:15 AM · NWS gauge page
Forecast peak 129 ft Mon 5 PM
Reading from Sat 7 AM · NWS gauge page
Forecast peak 27.1 ft Mon 5 PM
Reading from Sat 6:45 AM · NWS gauge page
What this week’s weather means for heating, cooling, pipes and fresh air.
About 68% less heating than a typical week.
Heating degree days, base 65°F
47, 17 and 5°F are the test points heat pumps are rated at. About 15 hours are near freezing and damp, when outdoor units defrost more often.
Dry air outside (dew point 30°F). Indoor air will run dry too — a humidifier keeping indoor relative humidity in the 30–50% range is more comfortable and cuts static shocks, without going so high it fogs cold windows.
Today, 3:00 PM–4:00 PM
Good stretch to open the windows.
Today’s expected high is about typical for the date.
Porter weather by month: normals, records, snow and freeze dates
Sunrise 7:44 AM, sunset 6:09 PM.
Clouds most of the night (about 93% cover).
Waxing gibbous
97% lit · growing