A different day to yesterday on 28MHz WSPR

Although the map looks quite similar to yesterday, in fact, it felt quite different. There was no sign of VK/ZL this morning for me, the band opened with Eastern Europe and Russia, although a VK5 was received here around midday – I was not heard there.
Also, many periods went by without my signals being spotted – very different to yesterday. I did wonder if the aerial had a problem, but I am certain it was just slightly poorer conditions. The afternoon did improve slightly with a few reports from the USA, with KE7A being the furthest west.
I’ve noticed this with low power WSPR before – you are very much at the mercy of conditions – where as with higher power you’d ride out the peaks and troughs.