Kttc Rain Totals (2024)

FAQs

What does 80% chance of rain mean? ›

The answer? An “80% chance of rain” means an 80% chance that rain will fall somewhere within the forecasted area. Rain refers to 0.01 inch or more of water falling from the sky.

1/100 (0.01) of an inch of rain – The first measurable amount of rainfall reported by The National Weather Service. This would not leave puddles on the ground and would slightly wet the surface. This might occur during a light shower for 2-5 minutes or even a drizzle for 2 hours.

Using a 40% probability of rain as an example, it does not mean (1) that 40% of the area will be covered by precipitation at given time in the given forecast area or (2) that you will be seeing precipitation 40% of the time in the given forecast area for the given forecast time period.

Closer look at percentages

Let's use 60% as the rain chance in the forecast. That means 60% of the entire area (Central Florida) could see measurable rain at some point in the day, while the other 40% won't.

If the chance of rain is less than 50%, there's a greater likelihood of it staying dry than not. For example, a 20% chance of rain means there's an 80% chance of dry weather.

Rainfall rate is generally described as light, moderate or heavy. Light rainfall is considered less than 0.10 inches of rain per hour. Moderate rainfall measures 0.10 to 0.30 inches of rain per hour. Heavy rainfall is more than 0.30 inches of rain per hour.

Light rain gives up to 2–4 mm (0.07–0.15 in) of precipitation; Moderate rain gives 5–6 mm (0.19–0.23 in); Rain or strong rain gives up about 15–20 mm (0.59–0.78 in); Rainfall gives more than 30 mm (1.18 in).

Moderate rain is a step up from light rain and is typically between 0.3 to 0.6 inches of rain per hour.

Now, note that the chance of rain says nothing about the intensity of it. In our second example in Schoharie County, even though there is just a 40% chance, that thunderstorm can still drop a hefty amount of rain in a short period of time.

If there are 100 days in which the forecast for rain is 10%, then it should rain on 10 of those days and not rain on the other 90. So if you hear a forecast of 10% chance of rain, and it rains, it doesn't mean that the forecast is wrong, it just happens to be one of those rainy days.

How do they calculate rain percentage? ›

Confidence multiplied by the percentage of the area forecasted equals the "percentage of precipitation." So if there's a 100% confidence that 30% of the area will see rain, then it's a 30% chance [(1 x 0.3)100 = PoPs].

20 to 30% chance isolated, meaning a few showers and storms possible on the radar. Scattered. 40 to 60% chance, meaning that there's a good chance for a. few showers and storms.

A chance of rain refers to a probability between 30% and 50%. A likely chance of rain would be between 60% and 70%. And with any probability of precipitation higher than 75%, the forecaster has the option of describing it as “periods of rain,” “occasional rain” or simply “rain,” Blier said.

When meteorologists say there's an 80% chance of rain, they mean that there's a high probability that it will rain. Here's an analogy: Imagine you have a bag with 10 marbles in it, and 8 of them are blue.

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 ( ...

A chance of rain refers to a probability between 30% and 50%. A likely chance of rain would be between 60% and 70%. And with any probability of precipitation higher than 75%, the forecaster has the option of describing it as “periods of rain,” “occasional rain” or simply “rain,” Blier said.

The word 'Cent' comes from the Latin 'Centum', meaning "Hundred." So, 80% means 80 out of 100. It represents a typical ratio/proportion case; 80% means four-fifths. For example, 80% of 400 will be (80/100) * 400 or (4/5) of 400, which is 320. Hope, this helps.