## What does rain percentage mean?

What Does the Percentage of Rain Mean? According to a viral take on the internet, the percentage of rain doesn’t predict the chances of 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.

## What does it mean when there is a 70% chance of rain?

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 does 75 percent chance of rain mean?

If the forecaster is only **75**% sure it will **rain** (C = 0.75) and if it **does**, only 80% of the forecast area will see that **rain** (A = 0.80), then. PoP = C x A.

## What does 80% chance rain mean?

An 80 percent chance of rain (or of any other kind of precipitation) means **the weather forecaster believes there will be an eight in ten chance (or 80 chances out of 100) of measurable precipitation (0.01 inch or more)** in the area under consideration during the time interval that is specified in the weather forecast ( …

## How is rain chance calculated?

Probability of precipitation is the forecast of >0.0254 cm (0.01 in.) … **PoP = C x A** where “C” = the confidence that precipitation will occur somewhere in the forecast area, and where “A” = the percent of the area that will receive measurable precipitation, if it occurs at all.

## What does 60% rain mean?

So just what the heck does a “60 percent chance of rain” mean? It means that **the weather forecaster has made two estimates, multiplied them together, and come up with a number called the PoP, or Possibility of Precipitation.**

## What does 70 chance of rain mean UK?

Chance of precipitation

For example, a 70% chance of rain represents a **7 in 10 chance** that precipitation will fall at some point during that period.

## What does the percentage of rain mean iPhone?

What does the percentage of rain mean on weather forecasts and the iPhone app? … ‘So **60 per cent means a 60 per cent chance of rain, 40 per cent chance of dry**. There are different ways of expressing percentages and in the USA they do use the area one, but generally not here in the UK.

## What does it mean when it says 30% chance of rain?

Well, the technical term Meteorologists use for rain chances is **Probability of Precipitation**, or POP for short. … 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. Days like that, we say isolated showers.

## How much precipitation is needed for rain?

Precipitation will fall 30% of the day (or night) **Thirty percent** of the forecast area will experience rain, snow, or storms.

…

How Much Rain Will Accumulate.

Terminology | Rainfall Rate |
---|---|

Light | 0.01 to 0.1 inch per hour |

Moderate |
0.1 to 0.3 inches per hour |

Heavy | >0.3 inches per hour |

## Is 40 percent chance of rain a lot?

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**.”

## What does 10 percent chance of rain mean?

10y. It is a 10% chance **that it is going to rain in that general area**.

## Is 80 percent of rain bad?

40%-50% – SCATTERED – Roughly half of the area will encounter a shower or storm. 60%-70% – NUMEROUS – Much of the area is covered so it’s likely you will get wet. 80%-**100**% – WIDESPREAD – The entire area is covered with showers and storms so everyone gets rain!

## What does 80 chance of rain mean UK?

So a forecast of 80% chance of rain in your region should broadly mean that, on about 80% of days when the weather conditions are like tomorrow’s, **you will experience rain where you are**.

## Are showers worse than rain?

Compared to rain, **showers cover a smaller area but can be more intense**. Cumulonimbus clouds (thunderstorm clouds) produce the heaviest rainfalls. Showers from stratocumulus clouds (not as puffy) tend to not be so heavy.