– Lat/Long: 47.77° N 121.58° W
Mount Index
Weather Forecast, United StatesIssued: 10 am Mon 16 Mar Local TimeUpdates in: hr min sUpdate imminent
Issued: 10 am Mon 16 Mar Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Mon 16 Mar Local Time
Updates in:
Update imminent hr min s
2 Mount Index Elevations: 2 Forecast Elevations: Days 1–3 Weather SummaryA light covering of new snow mostly falling on Mon morning will be washed away by heavy rain (total 73mm) on Wed morning. Temperatures will be slightly above freezing (max 4°C on Mon night, min 1°C on Mon night). Winds increasing (light winds from the SW on Tue night, near gales from the SW by Wed night). | Days 4–6 Weather SummaryMild with heavy rain (total 37mm), heaviest during Thu afternoon. Becoming colder with a moderate fall of snow heaviest on Fri afternoon. Freeze-thaw conditions (max 5°C on Fri morning, min -8°C on Sat morning). Winds decreasing (near gales from the SW on Fri morning, light winds from the NW by Sat night). | |||||||||||||||||
Monday 16 | Tuesday 17 | Wednesday 18 | Thursday 19 | Friday 20 | Saturday 21 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | | |  |  | | | | |  | | |  | |  |  | |
light snow | light rain | snow shwrs | light rain | light rain | heavy rain | heavy rain | heavy rain | heavy rain | light rain | heavy rain | mod. rain | heavy rain | light snow | light snow | light snow | cloudy | clear | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
4 | — | 1 | — | — | — | — | — | — | — | — | — | — | 4 | 5 | 3 | — | — | |
— | 2 | 0.4 | 2 | 1.1 | 20 | 24 | 13 | 10 | 1.9 | 11 | 9 | 15 | — | — | — | — | — | |
max °C | 2 | 3 | 4 | 2 | 4 | 4 | 3 | 4 | 4 | 3 | 2 | 4 | 5 | 1 | -1 | -8 | -6 | -3 |
min °C | 2 | 3 | 1 | 1 | 3 | 4 | 3 | 4 | 3 | 2 | 2 | 3 | 4 | 0 | -7 | -8 | -7 | -6 |
-4 | -3 | -5 | -5 | -2 | 0 | -3 | -1 | -3 | -5 | -5 | -3 | -3 | -8 | -14 | -15 | -14 | -10 | |
2700 | 2700 | 2300 | 2400 | 2600 | 2650 | 2500 | 2650 | 2500 | 2550 | 2650 | 2650 | 2500 | 1750 | 1000 | 700 | 950 | 0 | |
Cloud base (m) | 650 | 650 | 850 | 650 | 650 | 600 | 650 | 600 | 700 | 650 | 600 | 650 | 600 | 650 | 650 | 650 | 700 | 650 |
 | 7:18 | — | — | 7:15 | — | — | 7:13 | — | — | 7:11 | — | — | 7:09 | — | — | 7:07 | — | — |
 | — | 7:12 | — | — | 7:14 | — | — | 7:15 | — | — | 7:16 | — | — | 7:17 | — | — | 7:20 | — |
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Mount Index Weather (Days 0-3):
The weather forecast for Mount Index is: A light covering of new snow mostly falling on Mon morning will be washed away by heavy rain (total 73mm) on Wed morning. Temperatures will be slightly above freezing (max 4°C on Mon night, min 1°C on Mon night). Winds increasing (light winds from the SW on Tue night, near gales from the SW by Wed night).
Mount Index Weather (Days 3-6):
Mild with heavy rain (total 37mm), heaviest during Thu afternoon. Becoming colder with a moderate fall of snow heaviest on Fri afternoon. Freeze-thaw conditions (max 5°C on Fri morning, min -8°C on Sat morning). Winds decreasing (near gales from the SW on Fri morning, light winds from the NW by Sat night).
This table gives the weather forecast for Mount Index at the specific elevation of 1832 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of Mount Index. 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 |
|---|---|---|---|---|---|
 | |||||
* 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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