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Wreckage of a World War Two German warship is seen in the Danube in Prahovo, Serbia August 18, 2022. "The German flotilla has left behind a big ecological disaster that threatens us, people of Prahovo," said Velimir Trajilovic, 74, a pensioner from Prahovo who wrote a book about the German ships.
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However, this year's drought - viewed by scientists as a consequence of global warming - has exposed more than 20 hulks on a stretch of the Danube near Prahovo in eastern Serbia, many of which still contain tonnes of ammunition and explosives and pose a danger to shipping. The vessels were among hundreds scuttled along the Danube by Nazi Germany's Black Sea fleet in 1944 as they retreated from advancing Soviet forces, and still hamper river traffic during low water levels. Alternatively, a site lower than model orography (Site B) may have forecast wind speeds slightly over-estimated and hence these are reduced slightly in the post-processing.PRAHOVO, Serbia (Reuters) - Europe's worst drought in years has pushed the mighty river Danube to one of its lowest levels in almost a century, exposing the hulks of dozens of explosives-laden German warships sunk during World War Two near Serbia's river port town of Prahovo. In these situations winds may be intensified slightly. If a site is higher in reality than the model orography (Site A), then the wind speed may be under-estimated by the model.
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This has implications for a range of forecast parameters (including rainfall, temperature, wind speed and visibility), meaning that orographic adjustments need making depending on a specific site elevation. Model orography is usually defined as the average elevation for each grid square. Orographic adjustment of local weather forecastsįigure 2 illustrates taking account of differences between model orography and reality. This method is often referred to as "intelligent grid point selection", whereby grid points with most similar characteristics to a specific location are given greater weighting in the final forecast. This means that forecast temperature and wind speed at Site B would be quite different depending on whether the wind is on- or off-shore. For coastal sites, the weighting between the 'land' and 'sea' values varies with the direction of the wind. Local forecasts for coastal sites can be more difficult to define than inland sites. Site A is likely to be computed from the nearest two land points as it is exactly half way between the two. Coastal adjustment of local weather forecastsįigure 1 illustrates how a local (site-specific) forecast can be computed from a range of surrounding model grid points. Two of the methods are briefly outlined below.
Local weather series#
The extracted model data for each location goes through a series of post-processing procedures to make the forecast more specific to a particular location, hence the name "site-specific" forecasts. The site-specific forecasts themselves have to be extracted from horizontal gridded fields for a range of forecast parameters, including rainfall, temperature and wind speed. This means that at any time, the most recent model data is available. They use a "best data" approach, whereby the most recent highest resolution model is used at any given forecast lead time.įorecasts are updated hourly to include the most recent nowcast and any recently updated forecast models. Local forecasts (or site-specific forecasts) are regularly updated and make use of a range of weather models run on the Met Office supercomputer. UK forecast How local weather forecasts are created You will then be given the option to choose from a range of locations near you.
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Simply enter your town, city, region, first half of a UK postcode or mountain area into the search box. Use the Met Office weather forecast page to find your local seven-day weather forecast. This page provides links to Met Office local weather forecasts along with details on how they are created.