Clouds
|
Roll Cloud Roll cloud - A low-level, horizontal, tube shaped accessory cloud completely detached from the thunderstorm base. It is located along the gust front and most frequently on the leading edge of a line of thunderstorms. Roll clouds are not and do not produce tornadoes.
|
|
|
|
Shelf Cloud Shelf cloud - A low-level horizontal wedge-shaped accessory cloud, usually attached to the thunderstorm base, that forms along the gust front. The leading edge of the shelf cloud is often smooth and at times layered or terraced while the underside is concave upward and appears turbulent, boiling, or wind-torn. Tornadoes rarely occur with shelf clouds. Remember that shelf clouds are usually found on the leading edge of an approaching thunderstorm.
|
|
Scud CloudScud cloud - Low ragged and wind-torn appearing cloud fragments, usually not attached to the thunderstorm base, often seen in association with, and behind gust fronts. Scud clouds DO NOT produce severe weather. Scud clouds are often mistaken for wall clouds and tornadoes, especially when attached to the thunderstorm base. A way to differentiate scud clouds from wall clouds is to watch their relative position with respect to the rain area: scud clouds move away from the rain area while wall clouds maintain the same relative distance.
|
|
Convective CloudsThe vertically developed family of clouds are cumulus and cumulonimbus. The height of their bases range from as low as 1,000 feet to a bit more than 10,000 feet. Clouds with extensive vertical development are positive indications of unstable air. Strong upward currents in vertically developed clouds can carry high concentrations of supercooled water to high levels where temperatures are quite cold. Upper portions of these clouds may be composed of water and ice.
|
|
Cloud StreetsRows of cumulus or cumulus-type clouds aligned parallel to the low-level flow. Cloud streets sometimes can be seen from the ground, but are seen best on satellite photographs.
|
|
Undulatus AsperatusGo to the following website to learn more about these amazing clouds.http://www.squidoo.com/asperatus-undulatus
|
|
I don't know what this structure is behind this storm.There was a possibility of cold air funnels on this day. I have never seen anything like this. Any suggestions?
|