Chehalis River near Grand Mound
2.1 mi- Level
- 129 ft
- Flow
- 243 cfs
Forecast peak 129 ft Mon 5 PM
Reading from Sat 6 AM · NWS gauge page
Appearance
Observed 6:35 AM PDT at KCLS
Mostly clear and 32°0°.
Today: low 35°2° (likely 32°0° to 37°3°), high 59°15° (likely 56°13° to 59°15°).
Now 32°0°
Mostly clear · Feels like 29°−2°
No precipitation expected in the next 2 hours.
From forecast models
| Hour | Conditions | Temperature | Feels like | Precipitation | Wind | Humidity | Cloud cover | UV index |
|---|---|---|---|---|---|---|---|---|
| Sat 7a | Fog | 31°−1° (likely 31°−1° to 37°3°) | 31°−1° | 0% | 0 mph0 km/h, gusts 3 mph4 km/h | 100% | 91% | 0 |
| Sat 8a | Fog | 31°−1° (likely 31°−1° to 38°3°) | 31°−1° | 0% | 0 mph0 km/h, gusts 2 mph4 km/h | 100% | 91% | 0 |
| Sat 9a | Fog | 34°1° (likely 34°1° to 40°4°) | 34°1° | 5% | 0 mph0 km/h, gusts 4 mph6 km/h | 96% | 84% | 0 |
| Sat 10a | Cloudy | 41°5° (likely 41°5° to 44°7°) | 41°5° | 5% | 0 mph0 km/h, gusts 4 mph7 km/h | 94% | 84% | 1 |
| Sat 11a | Cloudy | 46°8° (likely 45°7° to 48°9°) | 46°8° | 0% | 0 mph0 km/h, gusts 5 mph8 km/h | 86% | 75% | 2 |
| Sat 12p | Cloudy | 51°11° (likely 50°10° to 52°11°) | 51°11° | 0% | 0 mph0 km/h, gusts 5 mph8 km/h | 75% | 79% | 2 |
| Sat 1p | Cloudy | 55°13° (likely 53°12° to 55°13°) | 55°13° | 0% | 0 mph0 km/h, gusts 6 mph9 km/h | 65% | 82% | 3 |
| Sat 2p | Cloudy | 57°14° (likely 54°12° to 57°14°) | 57°14° | 0% | 1 mph2 km/h from S, gusts 7 mph12 km/h | 57% | 83% | 2 |
| Sat 3p | Cloudy | 57°14° (likely 55°13° to 58°14°) | 57°14° | 0% | 0 mph0 km/h, gusts 8 mph12 km/h | 54% | 79% | 2 |
| Sat 4p | Cloudy | 59°15° (likely 56°13° to 59°15°) | 59°15° | 0% | 0 mph0 km/h, gusts 7 mph12 km/h | 52% | 82% | 2 |
| Sat 5p | Cloudy | 57°14° (likely 54°12° to 59°15°) | 57°14° | 0% | 0 mph0 km/h, gusts 7 mph11 km/h | 58% | 77% | 1 |
| Sat 6p | Cloudy | 54°12° (likely 51°11° to 54°12°) | 54°12° | 0% | 0 mph0 km/h, gusts 4 mph6 km/h | 66% | 78% | 0 |
| Sat 7p | Cloudy | 50°10° (likely 49°9° to 51°11°) | 50°10° | 5% | 0 mph0 km/h, gusts 6 mph9 km/h | 79% | 80% | 0 |
| Sat 8p | Cloudy | 45°7° (likely 45°7° to 49°9°) | 45°7° | 5% | 0 mph0 km/h, gusts 5 mph9 km/h | 85% | 81% | 0 |
| Sat 9p | Cloudy | 43°6° (likely 43°6° to 47°8°) | 43°6° | 5% | 0 mph0 km/h, gusts 3 mph5 km/h | 87% | 81% | 0 |
| Sat 10p | Cloudy | 42°6° (likely 42°6° to 46°8°) | 42°6° | 5% | 0 mph0 km/h, gusts 4 mph6 km/h | 90% | 82% | 0 |
| Sat 11p | Cloudy | 41°5° (likely 41°5° to 46°8°) | 41°5° | 10%, 0.05 in1.3 mm | 0 mph0 km/h, gusts 4 mph6 km/h | 93% | 85% | 0 |
| Sun 12a | Cloudy | 39°4° (likely 39°4° to 46°8°) | 39°4° | 20%, 0.05 in1.3 mm | 0 mph0 km/h, gusts 5 mph8 km/h | 94% | 94% | 0 |
| Sun 1a | Cloudy | 39°4° (likely 39°4° to 46°8°) | 39°4° | 20%, 0.05 in1.3 mm | 0 mph0 km/h, gusts 5 mph8 km/h | 94% | 95% | 0 |
| Sun 2a | Cloudy | 39°4° (likely 39°4° to 46°8°) | 39°4° | 30%, 0.05 in1.3 mm | 1 mph2 km/h from SE, gusts 6 mph10 km/h | 93% | 96% | 0 |
| Sun 3a | Rain | 39°4° (likely 39°4° to 46°8°) | 39°4° | 30%, 0.05 in1.3 mm | 1 mph2 km/h from SE, gusts 9 mph14 km/h | 92% | 93% | 0 |
| Sun 4a | Rain | 38°3° (likely 38°3° to 46°8°) | 38°3° | 40%, 0.05 in1.3 mm | 1 mph2 km/h from ESE, gusts 11 mph17 km/h | 91% | 96% | 0 |
| Sun 5a | Rain | 38°3° (likely 38°3° to 48°9°) | 38°3° | 80%, 0.23 in5.8 mm | 2 mph3 km/h from SE, gusts 13 mph20 km/h | 91% | 99% | 0 |
| Sun 6a | Rain | 37°3° (likely 37°3° to 50°10°) | 37°3° | 80%, 0.23 in5.8 mm | 2 mph3 km/h from SE, gusts 15 mph24 km/h | 92% | 100% | 0 |
| Sun 7a | Rain | 36°2° (likely 36°2° to 46°8°) | 36°2° | 40%, 0.23 in5.8 mm | 2 mph3 km/h from SE, gusts 9 mph15 km/h | 93% | 100% | 0 |
| Sun 8a | Rain | 37°3° (likely 37°3° to 46°8°) | 33°1° | 40%, 0.23 in5.8 mm | 5 mph8 km/h from SE, gusts 14 mph23 km/h | 96% | 100% | 0 |
| Sun 9a | Rain | 38°3° (likely 38°3° to 47°8°) | 34°1° | 50%, 0.23 in5.8 mm | 5 mph8 km/h from SE, gusts 18 mph28 km/h | 100% | 99% | 0 |
| Sun 10a | Rain | 43°6° (likely 43°6° to 48°9°) | 40°4° | 60%, 0.23 in5.8 mm | 5 mph8 km/h from SE, gusts 20 mph32 km/h | 100% | 98% | 0 |
| Sun 11a | Rain | 47°8° (likely 47°8° to 49°9°) | 44°7° | 70%, 0.08 in2 mm | 6 mph10 km/h from SE, gusts 20 mph33 km/h | 99% | 97% | 0 |
| Sun 12p | Rain | 50°10° (likely 48°9° to 51°11°) | 48°9° | 70%, 0.08 in2 mm | 6 mph10 km/h from SE, gusts 19 mph30 km/h | 91% | 93% | 1 |
| Sun 1p | Rain | 53°12° (likely 49°9° to 54°12°) | 53°12° | 70%, 0.08 in2 mm | 6 mph10 km/h from SE, gusts 17 mph28 km/h | 84% | 82% | 0 |
| Sun 2p | Cloudy | 54°12° (likely 51°11° to 55°13°) | 54°12° | 60%, 0.08 in2 mm | 6 mph10 km/h from SE, gusts 17 mph27 km/h | 80% | 78% | 1 |
| Sun 3p | Cloudy | 55°13° (likely 51°11° to 56°13°) | 55°13° | 50%, 0.08 in2 mm | 6 mph10 km/h from SE, gusts 18 mph29 km/h | 78% | 88% | 0 |
| Sun 4p | Rain | 56°13° (likely 52°11° to 56°13°) | 56°13° | 40%, 0.08 in2 mm | 6 mph10 km/h from SE, gusts 19 mph31 km/h | 76% | 93% | 1 |
| Sun 5p | Cloudy | 54°12° (likely 51°11° to 55°13°) | 54°12° | 60%, 0.04 in1 mm | 5 mph8 km/h from SE, gusts 17 mph27 km/h | 80% | 99% | 0 |
| Sun 6p | Cloudy | 53°12° (likely 50°10° to 53°12°) | 53°12° | 60%, 0.04 in1 mm | 5 mph8 km/h from SE, gusts 15 mph24 km/h | 84% | 95% | 0 |
| Sun 7p | Cloudy | 50°10° (likely 50°10° to 52°11°) | 49°9° | 60%, 0.04 in1 mm | 5 mph8 km/h from SE, gusts 11 mph17 km/h | 92% | 89% | 0 |
| Sun 8p | Rain | 47°8° (likely 47°8° to 51°11°) | 47°8° | 60%, 0.04 in1 mm | 2 mph3 km/h from ESE, gusts 11 mph17 km/h | 100% | 79% | 0 |
| Sun 9p | Cloudy | 45°7° (likely 45°7° to 50°10°) | 45°7° | 60%, 0.04 in1 mm | 2 mph3 km/h from ESE, gusts 12 mph19 km/h | 100% | 86% | 0 |
| Sun 10p | Rain | 44°7° (likely 44°7° to 50°10°) | 44°7° | 60%, 0.04 in1 mm | 2 mph3 km/h from ESE, gusts 16 mph26 km/h | 100% | 83% | 0 |
| Sun 11p | Cloudy | 44°7° (likely 44°7° to 50°10°) | 41°5° | 80%, 0.03 in0.8 mm | 5 mph8 km/h from ESE, gusts 16 mph27 km/h | 100% | 96% | 0 |
| Mon 12a | Rain | 44°7° (likely 44°7° to 49°9°) | 41°5° | 80%, 0.03 in0.8 mm | 5 mph8 km/h from ESE, gusts 16 mph25 km/h | 100% | 78% | 0 |
| Mon 1a | Drizzle | 43°6° (likely 43°6° to 48°9°) | 41°5° | 80%, 0.03 in0.8 mm | 5 mph8 km/h from ESE, gusts 15 mph24 km/h | 100% | 91% | 0 |
| Mon 2a | Mostly clear | 43°6° (likely 43°6° to 48°9°) | 41°5° | 80%, 0.03 in0.8 mm | 3 mph5 km/h from E, gusts 12 mph19 km/h | 100% | 61% | 0 |
| Mon 3a | Rain | 42°6° (likely 42°6° to 48°9°) | 40°4° | 80%, 0.03 in0.8 mm | 3 mph5 km/h from E, gusts 11 mph17 km/h | 100% | 89% | 0 |
| Mon 4a | Rain | 42°6° (likely 42°6° to 49°9°) | 40°4° | 80%, 0.03 in0.8 mm | 3 mph5 km/h from E, gusts 12 mph20 km/h | 100% | 99% | 0 |
| Mon 5a | Rain | 41°5° (likely 41°5° to 49°9°) | 41°5° | 30%, 0.01 in0.3 mm | 2 mph3 km/h from E, gusts 11 mph17 km/h | 100% | 87% | 0 |
| Mon 6a | Rain | 40°4° (likely 40°4° to 48°9°) | 40°4° | 30%, 0.01 in0.3 mm | 2 mph3 km/h from E, gusts 4 mph6 km/h | 100% | 92% | 0 |
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
80% chance · 0.48 in12 mm
Official NWS forecast
Today: Mostly cloudy. High near 59, with temperatures falling to around 57 in the afternoon. North wind around 1 mph.
Tonight: Rain after midnight. Mostly cloudy. Low around 35, with temperatures rising to around 38 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 · 1.2 in31 mm
Afternoon
noon–6 PM
70% chance · 0.44 in11 mm
Evening
6 PM–midnight
80% chance · 0.23 in5.8 mm
Overnight
midnight–6 AM
80% chance · 0.16 in4.1 mm
Official NWS forecast
Day: Rain. Cloudy. High near 56, with temperatures falling to around 54 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 39. East southeast wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
40% chance · 0.03 in0.6 mm
Afternoon
noon–6 PM
20% chance
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 59. East northeast wind 0 to 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Night: Mostly cloudy, with a low around 37.
Forecasts agreeIndependent forecasts are close; the range is narrow.
Morning
6 AM–noon
20% chance · 0.05 in1.2 mm
Afternoon
noon–6 PM
30% chance · 0.04 in1 mm
Evening
6 PM–midnight
40% chance · 0.07 in1.8 mm
Overnight
midnight–6 AM
70% chance · 0.11 in2.9 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 59.
Night: A chance of rain. Mostly cloudy, with a low around 36.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
60% chance · 0.1 in2.5 mm
Afternoon
noon–6 PM
70% chance · 0.12 in3.1 mm
Evening
6 PM–midnight
60% chance · 0.07 in1.8 mm
Overnight
midnight–6 AM
50% chance · 0.02 in0.5 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: Rain likely. Mostly cloudy, with a high near 56.
Night: A chance of rain. Mostly cloudy, with a low around 33.
Forecasts agreeIndependent forecasts are close; the range is narrow.
Morning
6 AM–noon
40% chance · 0.05 in1.1 mm
Afternoon
noon–6 PM
40% chance · 0.12 in3.1 mm
Evening
6 PM–midnight
40% chance · 0.12 in3 mm
Overnight
midnight–6 AM
20% chance · 0.14 in3.7 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain. Partly sunny, with a high near 56.
Night: A slight chance of rain before 11pm. Mostly cloudy, with a low around 32.
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: Partly sunny, with a high near 57.
Night: Partly cloudy, with a low around 32.
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.
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 differIndependent forecasts disagree; expect changes and plan for the range.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
20% chance
Evening
6 PM–midnight
20% 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 59°, low 35°.
79% chance of rain, high 56°, low 39°, cooling off.
30% chance of rain, high 59°, low 37°, warming up.
Highs 50–59°; 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 129 ft Mon 5 PM
Reading from Sat 6 AM · NWS gauge page
Forecast peak 204 ft Sun 11 AM
Reading from Sat 5:45 AM · NWS gauge page
Forecast peak 177 ft Sun 11 AM
Reading from Sat 5 AM · NWS gauge page
Forecast peak 152 ft Mon 5 PM
Reading from Sat 5 AM · NWS gauge page
What this week’s weather means for heating, cooling, pipes and fresh air.
About 69% 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 19 hours are near freezing and damp, when outdoor units defrost more often.
Dry air outside (dew point 32°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.
No stretch in the next few days is comfortable enough outside, by temperature, dew point and air quality.
Today’s expected high is 2°1° warmer than typical.
On average 0° colder than normal (daily mean temperature).
Grand Mound weather by month: normals, records, snow and freeze dates
Sunrise 7:43 AM, sunset 6:08 PM.
Clouds most of the night (about 90% cover).
Waxing gibbous
97% lit · growing