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Reply #2: Here's why. [View All]

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LeftyFingerPop Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Nov-26-07 08:17 PM
Response to Original message
2. Here's why.
Edited on Mon Nov-26-07 08:25 PM by philboy
Hi Critters :hi:

This is a fair question, and I used to wonder the same thing.

What they are referring to is the probability of precipitation at YOUR specific location within the forecasting area. When a weather system impacts a particular locality, it is not usually seen on weather radar as a solid band of precipitation. You will see breaks of "clear" areas within the weather system. Sometimes these clear areas are quite large, so an area , say, 15 miles away from your home may be getting deluged with rain, while it is perfectly dry at your house.

Depending on the voracity or the enormity of the system, the weather forecasters will assign a probability of precipitation. For a large, intense weather system, they will assign a probability of 100%, meaning that the system will be so large and dense that they can predict with certainty that it will impact your house. A system that will only cause relatively widespread showers in your forecasting area may be assigned a probability of 30% of hitting your home.
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