– Lat/Long: 47.51° N 121.74° W
Mount Si Weather Forecast
Cascade Range · United StatesIssued: 3 am Fri 13 Nov Local Time
Updates in:
Update imminent hr min s
Issued: 3 am Fri 13 Nov Local Time
Updates in:
Update imminent hr min s
2 Mount Si Elevations: 2 Forecast Elevations: Days 1–3 Weather SummaryHeavy rain (total 28mm), heaviest during Fri night. Later becoming colder with a dusting of snow on Sun morning. Freeze-thaw conditions (max 9°C on Fri morning, min 0°C on Sun night). Winds decreasing (near gales from the SE on Fri morning, light winds from the SSW by Sun night). | Days 4–6 Weather SummaryA light covering of new snow mostly falling on Wed afternoon. Freeze-thaw conditions (max 2°C on Tue afternoon, min -2°C on Tue night). Winds decreasing (fresh winds from the ESE on Tue night, calm by Wed night). | |||||||||||||||||
Friday 13 | Saturday 14 | Sunday 15 | Monday 16 | Tuesday 17 | Wednesday 18 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | |  |  |  |  |  | |  |  | |  | | | | |
light rain | mod. rain | rain shwrs | rain shwrs | rain shwrs | mod. rain | light snow | cloudy | clear | clear | cloudy | snow shwrs | some clouds | clear | light snow | cloudy | light snow | light snow | |
Cloud base (m) | 700 | 500 | 700 | 550 | 750 | 400 | 450 | 900 | 950 | 1750 | 550 | 500 | 700 | 500 | 400 | 450 | ||
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | 1 | — | — | — | — | 1 | — | — | 1 | — | 4 | 1 |
mm | 0.1 | 6 | 8 | 0.6 | 1 | 10 | 1.8 | — | — | — | — | — | — | — | — | — | — | — |
max °C | 9 | 5 | 3 | 3 | 5 | 6 | 3 | 1 | 0 | 1 | 1 | 0 | 0 | 2 | 2 | -1 | -2 | -2 |
min °C | 6 | 4 | 2 | 2 | 3 | 3 | 2 | 1 | 0 | 1 | 0 | -1 | -1 | 0 | -2 | -1 | -2 | -2 |
chill °C | 3 | 2 | -4 | -2 | -2 | -2 | -4 | -5 | -4 | -2 | -2 | -5 | -5 | -4 | -7 | -6 | -6 | -5 |
Freezing level m | 2750 | 2100 | 1700 | 1700 | 1750 | 2050 | 1700 | 1450 | 1300 | 1400 | 1400 | 1150 | 1200 | 1350 | 1600 | 1150 | 950 | 950 |
 | 7:09 | — | — | 7:09 | — | — | 7:11 | — | — | 7:13 | — | — | 7:13 | — | — | 7:16 | — | — |
 | — | 4:31 | — | — | 4:30 | — | — | 4:30 | — | — | 4:29 | — | — | 4:28 | — | — | 4:27 | — |
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Mount Si Weather (Days 0-3):
The weather forecast for Mount Si is: Heavy rain (total 28mm), heaviest during Fri night. Later becoming colder with a dusting of snow on Sun morning. Freeze-thaw conditions (max 9°C on Fri morning, min 0°C on Sun night). Winds decreasing (near gales from the SE on Fri morning, light winds from the SSW by Sun night).
Mount Si Weather (Days 3-6):
A light covering of new snow mostly falling on Wed afternoon. Freeze-thaw conditions (max 2°C on Tue afternoon, min -2°C on Tue night). Winds decreasing (fresh winds from the ESE on Tue night, calm by Wed night).
This table gives the weather forecast for Mount Si at the specific elevation of 1270 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of Mount Si. To see the weather forecasts for the other elevations, use the tab navigation above the table.For a wider overview of the weather, consult the Weather Map of Washington.
| Weather Station | Temp. | Weather | Wind | Gusts | Cloud / Visibility |
|---|---|---|---|---|---|
 | |||||
 | |||||
SHIP7393 | |||||
SHIP8416 | |||||
SHIP9098 | |||||
SHIP3276 | |||||
SHIP2601 | |||||
SHIP4100 |
* NOTE: not all weather observatories update at the same frequency which is the reason why some locations may show data from stations that are further away than known closer ones.
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