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Doppler observations can also reveal the presence of flocks of birds over Port Phillip Bay, which appear as thin lines, and generally have a higher velocity than the surrounding area. These appear as radials of incorrect Doppler velocities in the area to the northeast of the radar. These echoes may be distinguished from rain as they do not move with the wind and end abruptly at the shoreline of the bay.Doppler observations are occasionally affected by multi path reflections off Melbourne City buildings and approaching rain bands. Because the radar has an unobstructed view of Port Phillip Bay out to about 25km, sea-clutter may be seen over the bay during strong winds. These usually become more noticeable on cold, clear, winter nights or early winter mornings. These echoes usually occur along ridges and peaks as isolated, stationary patches, being most common near the Yarra Ranges to the ENE and Mount Macedon to the north. Occasionally, some permanent echoes will not be completely removed from the display. Non-meteorological aspects In most cases the processing of the radar signal removes permanent echoes caused by obstructions such as hills, buildings and other solid objects rather than rainfall. The location on the floor of a wide basin is ideal for Doppler observations which provide wind speed information. Similarly, cold fronts and associated rain and thunderstorms approaching from the northwest, through west and south are well detected. Composite Doppler Radar loop for Alton VA, providing current animated map of storm severity from precipitation levels. Summer thunderstorms that develop on the surrounding hills and mountains may be observed in detail. The high ground from the east, through north and to the south west tends to obscure shallow rain falling further away.
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Meteorological Aspects The radar is well sited to provide very good coverage for the Greater Melbourne Metropolitan Area. The most significant obstructions, starting from the east, are: Mt Dandenong 644m high, 53km to the east Yarra ranges 1219m, 83km to ENE Mt Macedon 1013m, 56km to the north Pentland Hills 763m and the Brisbane ranges 421m, 45km from the NNW through to the west and the You Yangs 363m, 30km to the SW. The Great Dividing Range dominates the topography from the east, through the north to the west. The radar is on a tower 24m above ground level. For the most part the humidity is around 73%.Geographical Situation The radar is situated on the western plains of the Melbourne basin some 19km west-south-west of the Central Business District, about six kilometres from the western shores of Port Phillip bay and on a low rise about 20m above mean sea level. In the month of March on average Alton (24520) gets 101.72mm of rain and approximately 8 rainy days in the month.
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Alton (24520) weather in Marchĭaytime temperature stays around 15°c and at night it goes to 4°c. If you would just like to know what the weather was for a past dates for research or education or you are just curious then visit our historical weather of Alton (24520) section. Travelling to Alton (24520)? Check out our Weather averages of Alton (24520) to better plan your holiday or travel. September and December receive most rainfall with precipitation count of 123.46mm. Which months receive most rainfall in Alton (24520)? January and February are the coldest months with temperature at around -1°c. October and May are the best month to go for holiday or travel to Alton (24520) forecast these months temperature to be around 22°c and average of 230 hours of sunshine in a month. 24520, Alton, Virginia Holiday Weather Overview Best months to visit Alton (24520)?