Twenty day weather forecast

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These include day outlooks, monthly outlooks, and seasonal outlooks. Unlike regular "zone forecasts" issued by a local National Weather Service office, the climatological outlooks provide probability forecasts for both temperature and precipitation, divided into tercile groups: below normal, near normal, and above normal. For information about how to read the latest 8 to 14 day outlooks, for example, click here. Latest Day Precipitation Outlook. Latest Day Temperature Outlook. Latest 1-Month Precipitation Outlook.

Twenty day weather forecast

The extended range forecast, which includes the monthly and seasonal forecasts, can at times provide an insight into weather patterns in the months ahead. However, they should not be used for specific planning purposes as they have generally low skill compared with the day forecast. This is because forecasts beyond one week become increasingly uncertain due to the chaotic nature of the atmosphere. Further information can be found here Monthly and seasonal forecast explained. Week 1 will be largely unsettled with low pressure systems often tracking close to Ireland. A predominantly westerly airflow will steer frontal systems across the country at times, with rainfall amounts expected to be above average for most of the country. Rainfall will be closer to normal in southern coastal areas. Mean temperatures will be around normal, possibly slightly warmer than average in some western coastal areas. There is a trend towards more settled conditions in Week 2 as low pressure weakens and high pressure begins to have more of an influence on our weather. While occasional showers and spells of rain are likely, rainfall amounts will be lower than normal for most of the country. Coastal regions of the west will be the exception, with near average rainfall there.

While there is increased uncertainty in the trend for Week 3, current indications suggest that low pressure to the south of Ireland will establish an easterly airflow over the country.

A dry start to this period is most likely in the south of the UK, with some night-time frost and perhaps patchy fog, but rain will already by making its way into northern parts of the UK on Tuesday, spreading south. This sets the scene for a generally unsettled pattern that is likely to continue through to early March. Spells of rain are expected across all areas at times, wettest overall in the west and northwest, where it will also sometimes be windy. Temperatures are most likely to be around or a little above average, though some short-lived colder interludes that would allow sleet or snow to fall to lower levels are possible at times, these more likely in the north. An initial continuation of unsettled conditions is most likely in this period, with low pressure systems continuing to cross west to east over or close to the UK, with mostly short-lived spells of drier and brighter weather between times. Temperatures are likely to be near or slightly above normal overall, with occasional night frosts, but values will fluctuate as weather systems come and go.

Weather forecasting is the application of science and technology to predict the conditions of the atmosphere for a given location and time. People have attempted to predict the weather informally for millennia and formally since the 19th century. Weather forecasts are made by collecting quantitative data about the current state of the atmosphere, land, and ocean and using meteorology to project how the atmosphere will change at a given place. Once calculated manually based mainly upon changes in barometric pressure , current weather conditions, and sky conditions or cloud cover, weather forecasting now relies on computer-based models that take many atmospheric factors into account. The inaccuracy of forecasting is due to the chaotic nature of the atmosphere, the massive computational power required to solve the equations that describe the atmosphere, the land, and the ocean, the error involved in measuring the initial conditions, and an incomplete understanding of atmospheric and related processes. Hence, forecasts become less accurate as the difference between the current time and the time for which the forecast is being made the range of the forecast increases. The use of ensembles and model consensus helps narrow the error and provide confidence in the forecast. There is a vast variety of end uses for weather forecasts.

Twenty day weather forecast

Follow along with us on the latest weather we're watching, the threats it may bring and check out the extended forecast each day to be prepared. You can find the forecast for the days ahead in the weather details tab below. Current storm systems, cold and warm fronts, and rain and snow areas. Forecasted storm systems, cold and warm fronts, and rain and snow areas.

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Ever wondered why our forecasts for 5 days and beyond are written on the scale of the UK as a whole? It will be slightly warmer than average across the country also. Friday 8 Mar - Friday 22 Mar An initial continuation of unsettled conditions is most likely in this period, with low pressure systems continuing to cross west to east over or close to the UK, with mostly short-lived spells of drier and brighter weather between times. Check out our latest weather safety graphics, videos, social media posts, and more! Tue 27 Feb. A Southern Ocean front brought a cool change from the 22nd, with overnight minimum temperatures dropping to the low single digits in some parts of southern NZ, this an abrupt and rare blip in an otherwise notably warm month for most. February Outlook — The return of the Northland ridge and long-promised westerlies As kids across NZ head back to school, it looks like the weather maps have been studying hard over the summer break with a textbook El Nino month on the cards this February. Mean temperatures during MAM are signalled to be above average overall. Latest Day Precipitation Outlook. Sunday 3rd March Sun 3rd. Mostly cloudy with a few showers, clearing to fine in the afternoon. Light Rain Showers. Latest 1-Month Temperature Outlook. BBC Weather. Sat 24 Feb.

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Coastal regions of the west will be the exception, with near average rainfall there. Further south, eastern parts of South Canterbury, Otago and Southland remain dry, but closer to normal, with fronts during the second half of the month providing useful top-ups. Precipitation is not expected. Pollen Forecast Moderate. Expect some windy days in the mix too. However, they should not be used for specific planning purposes as they have generally low skill compared with the day forecast. Temperatures are likely to be near or slightly above normal overall, with occasional night frosts, but values will fluctuate as weather systems come and go. North Otago Oamaru Oamaru Airport. Latest 3-Month Precipitation Outlook. Warming winds ahead of weekend rain band. Light rain showers and light winds. Sunny and light winds. Climate and Past Weather.