10/5/2023 0 Comments Temperature of shelf cloudThe Storm Prediction Center has placed our area in a marginal risk (1 out of 5) for severe weather tonight and you can read more about the storm system here. Future winds associated with the potential gust front moving through the Valley Sunday night. The future wind model shows a spike in the wind gusts around this time which would be consistent with a gust front. Sunday night showing a gust front moving into the Valley You can see the line of light precipitation below: Future Tracker at 10:00 p.m. In fact, our Storm Team 27 Future Tracker has been focusing on a gust front moving through the area between 9 p.m. There will be the threat for a gust front in the Valley Sunday. Example of a gust front on radar courtesy of the National Weather Service. The gust front is often visible on radar as a thin line of light rain ahead of the main round of showers and thunderstorms. Example of a shelf cloud courtesy of the National Weather Service. These clouds form when warm inflow ahead of the gust front rises over the cooler air forming a cloud. All the way from the lowest freezing point to the highest acceptable temperature during secondary drying for example, in increments of 20 ☌ Shelf temperature should be measured with the highest possible accuracy. Although it looked like we were going to get a real downpour, the rain stayed north of the river.When gust fronts form, they can often produce photogenic cloud features known as a “roll cloud” or a shelf cloud. The shelf temperature settings during shelf mapping of the heating phase should similarly cover or exceed the entire range. Wind gusts once the shelf cloud has passed may be quite strong, causing downed trees, tree limbs and power outages.” As the cloud approached, the wind blew strongly, and the temperature seemed to drop. ![]() As the shelf cloud passes, you feel an abrupt wind shift in both direction and speed, followed within minutes by heavy rain or hail. When this warm, moist air condenses, you see the shelf cloud. A shelf cloud is also known as a Tsunami cloud due to what looks like a rotating motion as the cloud draws nearer to the land. Warmer, more moist air is lifted at the leading edge, or gust front, of this rain-cooled air. The name means roughly night shining in Latin. “Rain-chilled air descends in a thunderstorm, then spreads laterally when reaching Earth’s surface. Night clouds or noctilucent clouds are tenuous cloud-like phenomena that are the ragged-edge of a much brighter and pervasive polar cloud layer called polar mesospheric clouds in the upper atmosphere, visible in a deep twilight. A shelf cloud is attached to the base of the parent cloud, which is usually a thunderstorm cumulonimbus, but could form on any type of convective clouds. “A shelf cloud is the boundary between a downdraft and updraft of a thunderstorm or line of thunderstorms,” says senior meteorologist Jon Erdman. Shelf cloud A shelf cloud is a low, horizontal, wedge-shaped arcus cloud. ![]() There are two other phenomena that might resemble tornadoes or funnel clouds but are not 1) dark rain shafts or narrow columns of heavy rain, and 2) the white color of a hail shaft, a column of hail extending from the ground to the cloud base, may generate a light-dark contrast with surrounding rain, resulting in what might appear to be a funnel cloud or a tornado to the untrained eye. The weather radar this morning showed large areas of rain and thunderstorms in Indiana. Those driving in Atoka Wednesday morning found this surreal tubular cloud formation - known as a horizontal roll cloud. A rising cloud motion often can be seen in the leading part of the shelf cloud, while the underside often appears turbulent, boiling, and wind-torn. Clouds put on a show in Oklahoma in the wake of thunderstorms that rolled through the area Tuesday night. A shelf cloud over Enschede, Netherlands A shelf cloud in Durango, Mexico Roll cloud A roll cloud ( Cloud Atlas name volutus) is a low, horizontal, tube-shaped, and relatively rare type of arcus cloud. Sometimes they may found only a couple hundred feet above the ground.Ī shelf cloud is a low, horizontal wedge-shaped cloud, associated with a thunderstorm gust front (or occasionally with a cold front, even in the absence of thunderstorms). A time-lapse photography of shelf cloud just before a thunderstorm in Pondicherry, India. Shelf clouds often resemble snow plows, big waves or tsunamis and can be very scary-looking since they are usually low-hanging. According to the meteorologists, these are shelf clouds. A huge shelf cloud rolls in just east of Freeport. This morning some ominous looking clouds rushed over Kentucky, and apparently, much of the Eastern US as well. Science Shelf Clouds and Roll Clouds: Not Tornadoes, But Still Scary and Ominous (PHOTOS) By Jon Erdman J1/16 Freeport, Ill.
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