text: There has been a lot of hype surrounding the April lunar eclipse as the moon is set to turn blood red this Easter weekend. But in the lead up to the rare event tomorrow, the Sydney Observatory has been expressing their concerns over the bad weather forecast for the big night. So much so, they're plans to regularly update keen spectators with phase process images have been thwarted due to cloudy conditions. And according to the Bureau of Meteorology, it won't be getting any better. A blood red moon lights up the sky during a total lunar eclipse at on October 8, 2014 in Australia. The next two eclipses are forecast to happen are on April 4 and September 28, 2015 . But in the lead up to the rare event on Easter Saturday, the Sydney Observatory has been expressing their concerns over the bad weather forecast for the big night . The lunar eclipse this month will appear in Sydney's north-eastern sky however Sydney Observatory astronomer Andrew Smith told the ABC this could be one of the shortest eclipses. 'Some sources indicate it will be around 10 minutes of totality, which will make it the shortest since 1917, but other sources say it will be less than five minutes which makes it the shortest since 1592,' he said. A lunar eclipse occurs when the moon passes in the shadow of Earth. This is an area known as the umbra, where light from the sun is blocked by our planet. The light refracts differently in the atmosphere and, as it hits the moon, it appears red. The eclipse is the third in a series of four blood moons, with the final one expected on September 28. Saturday’s total lunar eclipse will turn the moon a burnt reddish orange. In this image the last blood moon is situated high above Sydney . This month's event is now booked out at the Sydney Observatory however more tickets may be released on Saturday morning if weather conditions improve. A lunar eclipse occurs when the moon passes in the shadow of Earth. This is an area known as the umbra, where light from the Sun is blocked by our planet. The light refracts differently in the atmosphere and, as it hits the moon, it makes it appear red. This gives rise to its ‘blood red’ appearance during a total eclipse, when the entire moon is in shadow. If it skirts the shadow, known as a partial or penumbral eclipse, the effect is less dramatic. However the forecast for Easter Saturday isn't looking very promising across Australia, according to the Bureau of Meteorology. Simon Allen, BOM's senior meteorologist, told the ABC that Adelaide will be have the clearest skies out of all the states - where the partial eclipse is set to begin at 8.45pm. Perth and Darwin may be lucky depending on the location of cloud bands. The partial eclipse is set to start at 6.15pm and 7.45pm respectively. Cairns, Hobart and Melbourne will most likely see patchy cloud conditions while Mr Allen says 'Sydney and Brisbane are the least likely to see it [the eclipse]'. The partial eclipse is set to start at about 8.15pm in Cairns. Sydney, Canberra, Hobart and Melbourne can expect theirs at 9.15pm.
target: The April lunar eclipse is set to turn the moon into blood red this Easter weekend .
  The Sydney Observatory has been concerned over the bad weather forecast for the big night .
  Adelaide will be have the clearest skies out of all the states, according to the Bureau of Meteorology .
  A lunar eclipse occurs when the moon passes in the shadow of Earth .