If watched on a radar loop, the number of storms within a multicell group grows exponentially; this is because each cell interacts with its neighbor cell, which in turn grows new cells. Sign up for our daily email newsletter or to receive breaking news delivered to your inbox: Choose from several print and digital subscription packages, © 1996–2020 Durango Herald | Ballantine Communications, Inc. All Rights Reserved. Some of the most recognizable thunderstorm types are shown here as they appear on reflectivity radar images. There were 27 reported in Colorado last year. Gallery: Durango football state quarterfinal win, Family in Ignacio becomes whole through adoption, Have you been keeping up with local headlines? 98, Durango writer turns pandemic challenges into children’s podcast, 2 people die in small plane crash near Telluride. Circulations can sometimes occur at a bow echo's ends, with the left (northern) end being the most favored for tornadoes, due to the fact that air flows cyclonically there. Jim Pringle, warning coordinator meteorologist at the Weather Service office in Grand Junction, was in Durango last week to teach a storm-spotting class, along with other classes and media visits around the area. Reports take about five minutes a day to log in, or less when there is no precipitation. More information from the National Weather Service is at weather.gov/gjt. By showing precipitation and its intensity as a color-coded image, it allows forecasters and weather novices alike, to keep up with rain, snow, and hail that may be approaching an area. 1 cause of weather-related deaths in the West, followed by flooding. Riders compete in the 4 Corners Cyclocross Series race on Saturday at Durango Mesa. Grand Junction is one of 124 National Weather Service forecast offices around the country and the closest to Southwest Colorado. Such storms are called "pulse thunderstorms.". More storm spotters are needed in this area to call in reports, he said. Is that supercell thunderstorm a potential tornado? And even though we live in the mountains, tornadoes can occur in Colorado. Along the leading edge of a bow echo, thunderstorms may produce downbursts or microbursts. Squall lines stretch over a hundred miles in length. Sign up for text alerts on your mobile phone. When it reaches the earth's surface, it is forced horizontally outward. Most single cells are non-severe, but if conditions are unstable enough, these storms can produce periods of brief severe weather. The arrows depict surface winds and downdrafts. Because of its size and solid structure, hail is exceptionally good at reflecting energy. More than 12,000 people nationwide volunteer for CoCoRAHS, and more are needed in this area and eastern Utah. Test your knowledge in Quiz No. An F1 did hit Durango on Oct. 5, 2004, Pringle said, and because a volunteer weather spotter called the storm in, the weather service was able to issue a warning about four minutes before it hit the ground. Because of this, yellows, oranges, and reds make severe storms easy to detect at a glance. This is why bow echoes are associated with damaging straight-line winds, especially at their center or "crest." When storm chasers see this pattern on radar, they can expect to have a successful chase day. Storm-spotting training is available online, but it is geared primarily toward tornadoes, Pringle said. Durango High School football defeats Canon City High School on Friday night at DHS. When storm chasers see this pattern on radar, they can expect to have a successful chase day. Skywarn Spotters, amateur radio volunteers who receive special training from the Weather Service and are called to observe weather phenomena, also are important for the Four Corners. Mini supercells, the most common of the supercells here, are made up of multiple stormclouds but rise to heights of only about 35,000 feet, compared with 70,000-foot towers of stormclouds in the Midwest, for example. The National Weather Service is part of the National Oceanic and Atmospheric Administration. Its Doppler radar is the second-highest in elevation in North America. The schematic plan views below show how isolated supercell thunderstorms (panel a) appear on radar reflectivity displays in comparison to various bow echo configurations (panels b-d). Quite often, a long line extending outward from the thunderstorm can be seen (as pictured at left). The blue areas have coverage, while the dark areas have little or no coverage, increasing the importance of weather spotters in the area. In the case of a telephone or cellular system crash, there are enough volunteer radio operators between Durango and Grand Junction to relay a message or weather report, Pringle said. What does The Polar Express look like under Level Red? When grouped in a line, multicell thunderstorms are referred to as squall lines. The hook signature is produced from precipitation that gets wrapped into the counterclockwise-rotating winds (mesocyclone) within a supercell storm. Weather radar is a vital forecasting tool. Broncos left without any QBs, 49ers could be forced to relocate as pandemic... NFL benches all Broncos quarterbacks for Saints game, Report a paper delivery issue/suspend delivery. This occurrence is what's called a hail spike; it almost always indicates that very large hail is associated with the storm. Lightning storms are divided into single-cell, multi-cell and supercell storms. As a general rule, the brighter the radar color, the more severe the weather associated with it. | Terms of Use | Privacy Policy. That stands for the Community Collaborative Rain, Hail and Snow Network. A storm Sept. 22, 2013, created tennis-ball-sized hail in western La Plata County, as well as flooding roads around the county. He advised people to wait until 30 minutes after a storm has passed before heading back outside because lightning is still possible that long after a storm dissipates. Multicell thunderstorms appear as clusters of at least 2-4 single cells moving together as one group.