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cad [2017/04/12 21:50] forsythsnow [Types of CAD] |
cad [2017/04/19 13:51] (current) sd |
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====== Types of CAD ====== | ====== Types of CAD ====== | ||
- | There are two types of CAD: | + | There are three types of CAD: |
- | Classical, which is when a high pressure builds in the Northeast or Southern Canada as a storm moves through. | + | Classical- |
+ | Classic cold air damming generally involves a strong 1030+mb surface high pressure in the northeastern US funneling cold air southward east of the Appalachian mountains. The surface high is locked into place by confluence over the northeast and the continued feed | ||
- | In- Situ, which is where a high pressure moves out of the Mid-Atlantic or Northeast, then moves out to sea once a storm system moves in. The cold air is still funneled in though the high is well off shore, or is lingering due to cloud cover. | + | In- Situ- |
+ | During In-situ damming a surface high pressure has deposited a cold dry air mass but the parent high has shifted out to sea and is no longer funneling a continued feed of arctic air into the damming region. The air mass becomes locked into place as warmer air is forced up and over the cold dome and precipitation is generated. | ||
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+ | Hybrid- | ||
====== Effects ====== | ====== Effects ====== | ||
- | CAD often is what results in ice storms throughout the CAD region. In addition, CAD also is a buffer to severe weather events when present, negating the threat down to a minimal level. | + | CAD often is what results in ice storms throughout the CAD region. In addition, CAD also is a buffer to severe weather events when present,negating the threat down to a minimal level. |
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