Orionid Meteor Shower Peaks October 21 as Clouds Threaten Views

Skywatchers across the United States will have an opportunity to see the annual Orionid meteor shower overnight Wednesday, October 21, into Thursday, October 22, 2026. The display occurs as Earth crosses debris left by Halley's Comet, although forecasts from weather services indicate that clouds and storms could obstruct views in several western states and parts of the Northeast.

According to NASA, the Orionids typically produce 10 to 20 meteors per hour under favorable viewing conditions. The particles enter Earth's atmosphere at approximately 41 miles per second, creating bright streaks that can leave glowing trails lasting several seconds to minutes.

The shower remains active from October 2 through November 7, according to NASA. Its peak offers the strongest opportunity for observers, with the hours after midnight generally providing the best viewing conditions in the Northern Hemisphere.

Weather.com forecasts generally favorable skies across much of the central and eastern United States during the early hours of Thursday. However, cloud cover could interfere with observations in the Four Corners region and parts of California, Oregon and Washington.

A developing nor'easter off the East Coast could also bring clouds inland during the middle and latter parts of the week. Weather.com identifies New York City and parts of New England as areas where cloud cover could be particularly disruptive. Rain, thunderstorms and flooding concerns could further limit viewing in California, Nevada and the Four Corners region on Wednesday and Thursday.

Michigan could offer better conditions during the peak. The Detroit Free Press reported that National Weather Service offices were forecasting mostly clear, dry skies overnight October 21-22, although temperatures were expected to be chilly.

Michigan's designated dark-sky locations include Headlands International Dark Sky Park in Mackinaw City, Sleeping Bear Dunes National Lakeshore near Empire, Pictured Rocks National Lakeshore in Munising, and Wilderness State Park in Carp Lake. Other options include Rockport State Recreation Area, Thompson's Harbor State Park, Negwegon State Park, Port Crescent State Park, Tahquamenon Falls State Park, Lake Hudson Recreation Area, Keweenaw Dark Sky Park, Dr. T.K. Lawless Park and the Beaver Island State Wildlife Research Area.

The Moon could also affect visibility during the peak. Sky & Telescope reported that the 82% waxing gibbous Moon in Aquarius is expected to remain visible until setting around 3 a.m. After moonset, observers could have nearly three hours of darker skies before dawn.

The Orionids appear to radiate from the direction of the constellation Orion, but NASA explains that the constellation itself is not the source. The meteors can appear across the sky, so observers do not need to look directly toward Orion to see them.

The particles originate from 1P/Halley's Comet, which sheds ice and rocky dust as it travels through the inner solar system. According to Fox Weather, the comet takes about 76 years to orbit the Sun, last appeared from Earth in 1986 and is expected to return in 2061.

As Earth crosses the comet's debris trail, small particles collide with the atmosphere and disintegrate, producing the luminous streaks. Some Orionids can become exceptionally bright fireballs, while the rapid movement of others creates glowing trails that persist briefly after the meteor has passed.

Sky & Telescope explains that the particles travel at approximately 66 kilometers per second, or about 41 miles per second. Their high speed results from the near head-on encounter between Earth and debris moving along the retrograde orbit associated with Halley's Comet.

Historical records indicate that the Orionids have been observed for centuries. Sky & Telescope reports that the earliest confirmed observations date to Chinese and Japanese records from around 585 A.D., when observers described unusually strong activity. Western astronomers began documenting the shower in the 19th century, including observations by Edward C. Herrick in 1839 and 1840.

For clearer views, astronomy guidance recommends finding an open location far from streetlights and other sources of light pollution. Observers should allow 20 to 30 minutes for their eyes to adjust to darkness, avoid bright phone screens and bring warm clothing, a blanket or a reclining chair.

In the Northern Hemisphere, lying on the back with feet pointing southeast can provide a broad view of the sky. The Orionids can also be observed from the Southern Hemisphere, where Fox Weather recommends facing northeast while watching the sky after midnight.

The Orionids are not the only meteor shower scheduled for late October and November. The Southern Taurids remain active through November 20 and are expected to peak overnight November 4-5, according to the Detroit Free Press.