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## What does 40 percent precipitation mean?

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**.”

## How much precipitation is needed for rain?

Light rain — when the precipitation rate is **< 2.5 mm (0.098 in)** per hour. Moderate rain — when the precipitation rate is between 2.5 mm (0.098 in) – 7.6 mm (0.30 in) or 10 mm (0.39 in) per hour. Heavy rain — when the precipitation rate is > 7.6 mm (0.30 in) per hour, or between 10 mm (0.39 in) and 50 mm (2.0 in) per …

## Does 50% mean its going to rain?

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.

## Does 100% precipitation mean rain?

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. … If we’re 50% confident that 100% of the Valley will get rain, then there’s a **50% chance of rainfall**.

## Does 40 chance of rain mean 40 of the area will get rain?

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.

## What does 40 percent chance of scattered thunderstorms mean?

If a forecaster mentions scattered thunderstorms, this implies that 30, 40, or 50 percent of **the area for which the forecast is valid is expected to experience measurable precipitation (0.01 inch or more) from thunderstorms during the valid time**. …

## What does 30% precipitation mean?

Well, the technical term Meteorologists use for rain chances is Probability of Precipitation, or POP for short. It takes into account two different factors. … 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.

## Is precipitation same as rain?

Precipitation is water released from clouds in the form of **rain**, freezing rain, sleet, snow, or hail. It is the primary connection in the water cycle that provides for the delivery of atmospheric water to the Earth. Most precipitation falls as rain.

## 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 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.

## What chance of rain actually means?

It only tells you how likely the coverage area is to pick up at **least 0.01″ of precipitation**. Although the PoP doesn’t tell you how long it will rain, we try to show you the most likely time it will rain during that 24-hour period.