For "wet weather" symbols these measurements include the hourly rainfall amount as well as the % chance of rain (probability of precipitation). The weather symbol is generated by taking a number of weather measurements, and then working out the most likely weather type based on them. How does % chance of precipitation relate to the weather symbol? Note that when the chance of precipitation is less than 5% it will appear grey on the website. This gives you the chance to spot when, for example, a shower may be approaching your location, as the probabilities will tend to rise. As MeteoGroup forecasts take advantage of hourly updates, which include real-time information from radar, satellite, and nearby weather station observations, you may notice the probabilities changing in the short-term (next 2-3 hours). The probabilities are given for the location chosen, and thus are valid for that location only.
In a nutshell, it means that, whilst you may get some rain, it's much more likely (but not certain) to stay dry. So what does a 20% chance of rain actually mean? It means that out of 100 situations with similar weather, it should rain on 20 of those, and not rain on 80. Our data supplier, MeteoGroup, uses the probability of precipitation (% chance), and this ranges from 0% (no chance at all) to 100% (it will be wet). What does % chance of precipitation (rain, snow, hail, etc) mean? This video offers further detail: Why are showers so hard to forecast? If you are making plans, either looking at a video forecast or the map on the website can be helpful to see if there are showers nearby.
REAL FEEL WEATHER CALCULATOR TV
We flag this up on the TV and video forecasts where we can give more context, and in the text on the website.
It is also possible for showers to form into bands which can cause one area to have continuous rain. Showers (including hail/thunder/snow) can be very heavy or long lasting. Their time or location doesn't have to be far out for the forecast not to be 100% correct. Showers can be especially hard to forecast. Questions about weather forecasting informationĪ short spell of rain or showers has been forecast.
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