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The squall line contains heavy precipitation, hail, frequent lightning, strong straight line winds, and possibly tornadoes and waterspouts. [28] Severe weather in the form of strong straight-line winds can be expected in areas where the squall line itself is in the shape of a bow echo , within the portion of the line that bows out the most. [ 29 ]
It may be marked by significant disruptions to normal conditions such as strong wind, hail, thunder and lightning (a thunderstorm), heavy precipitation (snowstorm, rainstorm), heavy freezing rain (ice storm), strong winds (tropical cyclone, windstorm), or wind transporting some substance through the atmosphere such as sand or debris.
More recently, the polarization properties of weather radar returns have been analyzed to differentiate between hail and heavy rain. [ 36 ] [ 37 ] The use of differential reflectivity ( Z d r {\displaystyle Z_{dr}} ), in combination with horizontal reflectivity ( Z h {\displaystyle Z_{h}} ) has led to a variety of hail classification algorithms ...
As the sweltering heat continues to bake the Midwest and Northeast this week, AccuWeather forecasters say a separate daily hazard will arise on the northern edge of the heat: severe thunderstorms.
Widespread showers and storms are possible on Thursday, bringing hail, strong winds and heavy rains. Flooding is also possible. Rain is expected throughout the day, up to 1.5 inches likely between ...
At least one person was rescued from the Los Angeles River as a fast-moving storm rolled through Southern California on Sunday, delivering pounding hail, rain and thunder to the region.
In Canada, a severe thunderstorm is defined as having wind gusts of greater than 90 km/h (56 mph), hail with a diameter of greater than two centimetres (0.79 in), rainfall rates of greater than 50 millimetres (2.0 in) in one hour or greater than 75 millimetres (3.0 in) in three hours, or tornadoes. [14]
Nor'easters may cause coastal flooding, coastal erosion, heavy rain or snow, and hurricane-force winds. The precipitation pattern of Nor'easters is similar to other mature extratropical storms. Nor'easters can cause heavy rain or snow, either within their comma-head precipitation pattern or along their trailing cold or stationary front.