Spokane, WA
Best window: Thursday 4:00 AM PDT-Thu, 5:00 AM PDT
Regional darkness proxy: 100%
No material limiter
State overview · Conditions vary by location
Washington
Wednesday night, September 16-17
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Conditions: 98 · Good
- Best window
- Thu, 4:00 AM PDT-Thu, 5:30 AM PDT
- Main limiter
- No major limiter identified for this window.
Moderate confidence forecastOne weather source (NWS); independent agreement unavailable, so confidence is capped at moderate.
Issued
Forecast expires
Next step: Inspect Vancouver, WA for broad conditions, then verify an actual observing site's weather and access before leaving.
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Decision details and other actions
Is Washington good for stargazing for Wednesday night, September 16-17?
Current conditions for the selected Washington forecast area look supportive during Wednesday night, September 16-17, especially during Thu, 4:00 AM PDT-Thu, 5:30 AM PDT.
Forecast source cycle: Sep 16 (UTC)
Single weather provider (NWS); independent agreement unavailable. Confidence is capped at medium. Confidence is medium.
Main limiter: No material limiter
Generated: Thursday, Sep 17, 2026, 10:47 AM UTC
Regional forecast sample: Vancouver, WA. This is a forecast area, not a ranked observing destination.
How this score works
Score combines the supported cloud, Moon and darkness inputs available for this forecast scope.
Washington hourly decision inputs
Use the hourly view to see when conditions improve, weaken, or become too uncertain to support a plan.
Thu, 4:00 AM PDTThu, 5:00 AM PDT
Selected comparison windowScale: 0–100
Strongest supported comparison window
Thu, 4:00 AM PDT-Thu, 5:30 AM PDT
Compare individual samples below before choosing your hour.
1 / 3
Full hourly data table · 3 samples
Scroll sideways for all conditions. Keyboard: focus the table, then use the arrow keys.
| Time | Score | Clouds | Rain | Moon | Darkness | Confidence |
|---|---|---|---|---|---|---|
| 98 (selected window) | 3% | 0% | 0% | 100% | Moderate confidence forecast | |
| 98 (selected window) | 3% | 0% | 0% | 100% | Moderate confidence forecast | |
| 98 (selected window) | 4% | 0% | 0% | 100% | Moderate confidence forecast |
Thu 4:00 AM selected
Score 98 (Conditions: Good). Confidence: Moderate confidence forecast.
This hour belongs to the selected comparison window; its own score still controls whether the hour is favorable.
Clouds 3%
Precipitation 0%
Moon effect 0%
Darkness 100%
Confidence and evidence
Selected window is relative, not a claim that every included hour is favorable or uninterrupted clear sky.
Scope: A conservative state summary copied from the highest eligible same-night forecast zone; it does not imply statewide coordinate precision.
Confidence: Moderate confidence forecast. Single weather provider (NWS); independent agreement unavailable. Confidence is capped at medium. Confidence is medium.
Main limiter: No supported factor materially limits this window.
Confidence describes evidence strength, not the probability that an observing session will succeed.
Regional forecast samples in this state
Broad planning samples, not ranked observing destinations
Washington map
State map images are temporarily unavailable. Review the regional forecast samples below for their available details.
Seattle, WA
Best window: Thursday 4:00 AM PDT-Thu, 5:30 AM PDT
Regional darkness proxy: 100%
No material limiter
Vancouver, WA
Best window: Thursday 4:00 AM PDT-Thu, 5:30 AM PDT
Regional darkness proxy: 100%
No material limiter
Planning beyond tonight
Longer-range state guidance
Seven-night planning is not available on this page. Missing nights are not estimated; recheck as each night enters the supported forecast window.
Guides for this state
Practical reads before local execution