Wind, Temperature and Relative Humidity Forecast for Astronomical Purposes.

As an aid to planning astronomical observing sessions, we offer wind, temperature, and relative humidity forecasts. Wind and temperature forecasts are useful for deciding what clothing to wear, and windy conditions can impair observing due to telescope vibrations. The relative humidity forecast can help astronomers decide whether or not to apply gentle heat to lenses to prevent dew formation. Note that the actual 15km resolution regional model used to produce these forecasts has cold bias and weak wind bias on top of mountains.

Winds forecast are represented by 6 colour levels.

1. Dark blue................. Calm winds.
2. Medium blue ........... Light winds.
3. Light blue................. Light to moderate winds.
4. Pale blue................. Moderate winds.
5. Grey........................ Strong winds.
6. White....................... Very strong winds.

[Surface]  [Temperature]  [Humidity]

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[ Graphics Off ] [ Format for Print ] top Important Notices and Disclaimers

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Created: 2002-12-31

Modified: 2004-07-13

Reviewed: 2002-12-31

URL of this page: http://weather.ec.gc.ca/astro/meteo_e.html

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