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Tropical Storm Colin Pulls Away from the Coast; Severe Weather for Portions of Montana and Plains on Sunday

Tropical Storm Colin will continue to track away from the U.S. East Coast through Sunday. Meanwhile, severe weather potential for portions of Montana and the Plains are forecast through Sunday. Critical fire weather conditions to persist across the Great Basin and interior Alaska the remainder of the weekend. Heat will build for the Plains, Ohio and Tennessee Valleys and Great Lakes into Monday. Read More >








  Summary and Eclipse Path | Safety Information | Forecast | What is an Eclipse?

August 21, 2017

A total solar eclipse will track from the Pacific coast to the Atlantic. The shadow of the moon will begin over Oregon and move east to Idaho, Montana, Wyoming, Nebraska, Kansas, Missouri, Illinois, Kentucky, Tennessee, Georgia, and South Carolina. Totality will begin over the US in Newport, OR at 11:16 MDT and will end near Charleston, SC at 12:48 MDT. A partial solar eclipse will be viewable over the rest of the US. Totality will track directly across Southern Idaho. At the center of totality the moon will block out the sun completely for approximately 2 minutes 40 seconds. Totality time will decrease the further you are away from the center of totality. An event of this magnitude will not occur again until 2045.


Eclipse Path Map

Blue Line: Center of Totality

Red Lines: Northern and Southern Boundaries of Totality



Solar Eclipse Begins At Newport, Oregon




Timing Information for North Central Idaho and Western Montana



City Obscuration Start of Partial Eclipse Time of Maximum   End of Partial Eclipse
Salmon, ID 98% 10:14 AM MDT 11:31 AM MDT 12:54 PM MDT
Grangeville, ID 96% 10:12 AM MDT 11:28 AM MDT 12:49 PM MDT
Butte, MT 94% 10:16 AM MDT 11:33 AM MDT 12:55 PM MDT
Missoula, MT 92% 10:15 AM MDT 11:31 AM MDT 12:55 PM MDT
Kalispell, MT 87% 10:16 AM MDT 11:31 AM MDT 12:51 PM MDT




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Local Safety Information

Make sure you are adequately prepared for the eclipse.  Summertime in North Central Idaho and Western Montana is hot and dry, and we are at the peak of wildfire season.


Weather & Safety Information


Wildfire Safety & Smoke Information


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Choose a forecast product type (temperature, wind, cloud cover, etc) and desired time from the menu/slider bars at the top of the map. The map will update automatically. Use your mouse to zoom into/pan around on the map.
National Weather Service forecasts are issued out to 7 days. Please check back for accurate forecasts near the eclipse date.


Current Northern Rockies Cloud Cover

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What is an Eclipse?

There are 2 different types of eclipses: solar and lunar.

A lunar eclipse happens at nighttime and occurs when the moon passes through the shadow of the Earth. These types of eclipses are much more common and generally last for a few hours.
Lunar Eclipse
A lunar eclipse is generally viewable in the locations in which it is nighttime. Lunar eclipses occur roughly 2 to 4 times per year.

Solar eclipses on the other hand are a rare special to see. Solar eclipses occur when the moon passes in between the Earth and the Sun.
Solar Eclipse
Eclipse safety below will explain the dangerous of viewing a solar eclipse and how to view one safely.
Solar eclipses can be broken up into 2 categories: Partial and Total. Partial solar eclipse is when the moon does not completely block out the Sun. This is due to there the Moon, Sun, and Earth do not form into a perfectly straight line. A total solar eclipse is what we will experience on August 21, 2017. The Moon, Sun, and Earth will align and the moon will completely cover the sun. Only during this time is it safe to look at the eclipse without any eye protection. This will only last for a few minutes before the Moon moves and the sun will begin to reappear.
Solar Eclipse

  • This will be the first total solar eclipse on America since 1991
  • Last time a total solar eclipse was seen in Wyoming was 1979
  • The first solar eclipse to move across the entire mainland of Americe since 1918
  • Community and social events are being held across the United States click here to find one across the US.


Eclipse Safety

Safety is a big concern when viewing a solar eclipse. You should NEVER look directly at the sun during an eclipse. Looking directly at the sun is only safe during the few minutes when the sun is at the totality. That will only occur in the very narrow path of about 60 to 70 miles wide from Oregon to South Carolina (see map above).

Viewing a Solar Eclipse


The only way to safely observe a partially eclipsed sun is through special solar filtered glasses. Homemade filters and ordinary sunglasses, are not safe for looking at the Sun. There are several manufactures of eclipse glasses to meet international standards.
Solar Glasses
Glasses can be found at various online retailers and are generally inexpensive. Be sure to follow any packaging instructions and supervise children using solar glasses.


If you are looking for a DIY solar eclipse viewer a pinhole projector is a safe but indirect way to view a solar eclipse.
Pinhole Projector


Other ways to view a solar eclipse include:

  • Telescopes with a Solar Filter
  • Welder's Glass #14 or darker

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