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## What does 30 percent chance of snow mean?

The confidence that measurable precipitation will occur within the forecast area. … Therefore a 30-percent chance of snow showers could mean **confidence is high that the showers will occur**, but maybe not over the entire forecast area.

## Is a 30 percent chance of rain high?

For example, a 30 percent chance of rain may mean **100 percent confidence** that only 30 percent of the forecast area is going to get rain. … Anything at or above a 30 percent chance of rain, it’s always a good idea to make sure you have my umbrella with you.

## What does a 30% chance of rain mean?

The official definition of the probability of precipitation by the National Weather Service is the chance of precipitation (rain, snow, etc.) occurring **at any one spot** in the area covered by the forecast. … For example, if we’re 100% confident that 30% of the Valley will get rainfall, then there’s a 30% chance for rain.

## What does 40 chance of rain really mean?

Instead, it means **a certain percentage of the forecasted area will definitely see rain**—so if you see a 40% chance, it means 40% of the forecasted area will see rainfall. … More commonly, meteorologists measure PoP as the chance of rain at any given point in the area they cover during a certain period of time.

## Is 40% chance of snow high?

A 40 percent chance of snow means the forecaster believes you will experience **snow 4 out of every 10 times you hear** such a forecast (assuming the forecasts verify perfectly). … For example, in a given situation, scattered thunderstorms are expected, but only 40 percent of the area will receive rain.

## What does 70% rain mean?

Basically, it means that **a certain percentage of the forecast area is expected to get rain**. … So, hold onto your umbrellas because after today we have a 70 percent chance of rain for Thursday and a 60 percent chance of rain for Friday.

## Is 40 chance of rain bad?

The good news is that the average person doesn’t need to get out a pencil and paper every time they read the forecast. According to the National Weather Service, if you see a 40 percent chance of rain, “there is a 40 percent **chance that rain will occur at any given point in the area**.”

## Does 60% chance of rain mean it will rain?

If they say 60% chance of rain, **60% of their area will experience rain at some point during the forecast period**. … Likewise, 20% chance of rain means you’re unlikely to see any rain at all today, or 20% of the area is going to be drenched.

## What does a 50 percent chance of rain mean?

A 50 percent chance of rain means **there is a 50 percent chance for any one spot in the forecast area to get wet during the forecast period**.

## Is 20 chance of rain high?

If we’re just expecting a small storm or two, we’d say **20% of the area will see rain**. On the other hand, if we’re expecting more widespread rain, the area that will see rain would be more like 70% or 80%.

## What does a 10% chance of rain mean?

If there’s a 10 percent chance of rain, it means **the current conditions yield rainfall one out of every 10 times observed**. … It can be so small scale that one part of a county may get drenched with an inch of rain on a particular day while another portion of that same county stays completely dry.”

## Is one inch a lot of rain?

One (1.00) inch of rain – A **light moderate rain never reaches this amount**, heavy rain for several hours (2-5 hours). There would be deep standing water for long periods of time.