That's because a hook echo is an "x marks the spot" indication of favorable locations for tornado development. He also teaches them twice a year in Grand Junction. A good portion of weather-spotter training covers lightning and thunderstorms. Weather reports can be made on Facebook or Twitter or by calling the Grand Junction office at (970) 243-7007. A storm Sept. 22, 2013, created tennis-ball-sized hail in western La Plata County, as well as flooding roads around the county. This training also qualifies you to call in and report weather incidents to the National Weather Service office in Grand Junction, although that function is also available to the public as well. 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). Another opportunity for people to participate in weather observation is CoCoRAHS. Mini supercells can create updraft and downdraft winds of up to 100 mph, he said. Tiffany Means is a meteorologist and member of the American Meteorological Society who has worked for CNN, the National Oceanic and Atmospheric Administration, and more. Pringle said a new program is Weather-Ready Nation, which seeks community ambassadors to help prepare for weather-related emergencies. Reports take about five minutes a day to log in, or less when there is no precipitation. (While super cells can't be distinguished from other thunderstorms on base reflectivity images, the presence of a hook means the storm depicted is in fact a supercell.). The National Weather Service office in Grand Junction is staffed 24 hours a day, with 14 people working on rotating shifts. It appears on radar as a clockwise, hook-shaped extension that branches off from the right rear of a supercell thunderstorm. Grand Junction is one of 124 National Weather Service forecast offices around the country and the closest to Southwest Colorado. This occurrence is what's called a hail spike; it almost always indicates that very large hail is associated with the storm. Durango High School defeats Lutheran High School on Saturday in the quarter final playoff game at DHS. Sometimes a squall line slightly curves outward, resembling an archer's bow. Riders compete in the 4 Corners Cyclocross Series race on Saturday at Durango Mesa. 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. Jim Pringle, a meteorologist at the National Weather Service, displays a map of weather radar coverage in the Four Corners. On short notice, Colorado Buffaloes beat San Diego State. That stands for the Community Collaborative Rain, Hail and Snow Network. As a result, its radar return values are quite high, usually 60+ decibels (dBZ). 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. When grouped in a line, multicell thunderstorms are referred to as squall lines. Its Doppler radar is the second-highest in elevation in North America. More than 12,000 people nationwide volunteer for CoCoRAHS, and more are needed in this area and eastern Utah. 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. Even with radar and satellites, there are still things meteorologists can’t see, he said, such as smoke from the Missionary Ridge Fire in 2002 that they didn’t know about in Grand Junction until someone called and reported it. What does The Polar Express look like under Level Red? The bow shape is produced from the rush of cool air that descends from a thunderstorm downdraft. When storm chasers see this pattern on radar, they can expect to have a successful chase day. 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. The only requirement is the purchase of a 4-inch professional rain gauge. Most tornadoes in Colorado are F0 to F1 in intensity, meaning they’re small in force compared with the F4 and F5 variety often seen in the Midwest. 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. 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.