USNO Data for 2017 Solar Eclipse for
Mount Saint Helens Clear Sky Chart


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from: http://aa.usno.navy.mil/data/docs/Eclipse2017.php

Solar Eclipse Computer

U.S. Naval Observatory
Astronomical Applications Department

Solar Eclipse of 2017 Aug. 21

Sun in Partial Eclipse at this Location

Mount Saint Helens

August 21, 2017   Universal Time and Local Time (UT1)Delta T: 69.4s
PhenomenonTime (UT1)Sun's Altitude (°)Sun's Azimuth (°)Position Angle (°)Vertex Angle (°)
Eclipse Begins16:07:26.0(UT) 9:07:26.0(Local)28.4103.1282.2325.6
Maximum Eclipse17:20:12.9(UT) 10:20:12.9(Local)40.1119.5
Eclipse Ends18:39:18.2(UT) 11:39:18.2(Local)50.4143.0109.9135.1


Duration2h 31m 52.2s
Magnitude0.969
Obscuration96.8%
< Local times are accurate only if the timezone for the Mount Saint Helens clear sky chart is really UT-7.) UT times are accurate only if the latitude/longitude of the chart for Mount Saint Helens is accurate. Check the road map.>


Forecast History for the Mount Saint Helens clear sky chart for late August

Extracted from the Mount Saint Helens clear sky chart climate/history page.
With the help of sponsors.

Cloud Cover

Color Meanings:
Overcast 90% covered 80% covered 70% covered 60% covered 50% covered 40% covered 30% covered 20% covered 10% covered Clear
AugustOccurrence of each Forecastdata points
16th to endDay
11%7%24313347%49%
2193

Transparency

Color Meanings:
Too cloudy to forecast Poor Below Average Average Above average Transparent
AugustOccurrence of each Forecastdata points
16th to endDay
32%312%31%16%4
2193

DISCLAIMER: This weather data is based from past forecast records, not from sky observations. So it's possible that it is not an accurate indication of weather for the eclipse. If you miss seeing the eclipse because you took a climate/history page for a clear sky chart, or the weather data on this page, too literally, your only recourse is to complain to me in email. Reminder: by using this website you agree to not sue me for any reason.


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Copyright 2017 A. Danko