It is issued by the Storm Prediction Center (SPC) in Norman, Oklahoma. Watch Cancellation This product will be issued to let the public know when either a Tornado Watch or Severe Thunderstorm Watch has been canceled early. Watch Box (or simply "Box") - slang for a Severe Thunderstorm Watch or Tornado Watch issued by the SPC. It is intended to provide enough lead time so that those who need to set their plans in motion can do so. Watch A watch is used when the risk of a hazardous weather or hydrologic event has increased significantly, but its occurrence, location, and/or timing is still uncertain. Wasatch Wind A strong easterly wind blowing out of the mouths of the canyons of the Wasatch Mountains onto the plains of Utah. A warning is used for conditions posing a threat to life or property. Warning A warning is issued when a hazardous weather or hydrologic event is occurring, is imminent, or has a very high probability of occurring. Warm Sector A region of warm surface air between a cold front and a warm front. Warm Occlusion A frontal zone formed when a cold front overtakes a warm front and, finding colder air ahead of the warm front, leaves the ground and rises up and over this denser air. Warm Front A transition zone between a mass of warm air and the colder air it is replacing. Unlike cold core lows, these lows produce much of their cloud cover and precipitation during the nighttime. Tropical cyclones exhibit this temperature pattern. ![]() Warm Core Low A low pressure area which is warmer at its center than at its periphery. Although the two terms are not properly interchangeable, both imply the presence of lifting in low levels. Low-level warm advection sometimes is referred to (erroneously) as overrunning. Warm Advection Transport of warm air into an area by horizontal winds. "Wall cloud" also is used occasionally in tropical meteorology to describe the inner cloud wall surrounding the eye of a tropical cyclone, but the proper term for this feature is eyewall. Wall clouds should be monitored visually for signs of persistent, sustained rotation and/or rapid vertical motion. Rotating wall clouds usually develop before strong or violent tornadoes, by anywhere from a few minutes up to nearly an hour. When seen from within several miles, many wall clouds exhibit rapid upward motion and cyclonic rotation. Wall clouds can range from a fraction of a mile up to nearly five miles in diameter, and normally are found on the south or southwest (inflow) side of the thunderstorm. ![]() Wall Cloud A localized, persistent, often abrupt lowering from a rain-free base. Wake The region of turbulence immediately to the rear of a solid body caused by the flow of air over or around the body. W West WAA Warm Air Advection - the advection (movement) of warm air into a region. NOAA's National Weather Service - Glossary
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |