Rainbow over Newcastle Ocean Baths, taken by @nordy5 on Sunday 13 May 2018.
How big is a rainbow?
Depending on how high the sun is, you might see a shallow arc or closer to a full semicircle; but as the angle between the sun, the raindrops and the observer is always the same (42°) the diameter/curvature of the arc will always be the same—however near or far the raindrops are to the observer. The reason some rainbows seem wider than others is that your brain compares the arc to other objects in view and makes an assumption about how far away the rainbow is. For example, if you see a rainbow over mountains you might get the impression it's a kilometer or more across, but if you see a rainbow in a sprinkler spray it would only seem a meter across. If you saw both at once, though, you'd see they have the same diameter.
Still trying to find the correct name for this phenomenon. Posted it on a weather nerd group on Facebook and so far no one else has seen such a thing.
Closest I could find is 'steam devils' on Wikipedia. I called them 'fog spouts'.
They were forming in the fields as the heavy morning fog started to lift. Very cool!
The dry climate edible garden workshop is still going ahead tomorrow! The Bureau of Meterology is forecasting a chilly but dry morning. There are still a couple of spots left if you've been umming and ahhing about joining us!
Pull out your woolies and join us at 9.30am at 405 Station st, Lalor. A yummy lunch will be provided! ☺
Leading edge of a cold front approaching Mentone Beach, Melbourne by @vaughanlawsphotography
A cold front is the boundary between two masses of air, the first warmer, the second colder. The arriving cool air mass is denser than the warm air before it and forces the warm air upwards creating a signature line of cloud along the frontal boundary. As the cold front passes there will be a change in the weather in terms of rainfall, a wind change and often a sharp drop in temperatures. Cold fronts are the major contributor to southern Australia's rainfall during the cooler months.