The rain continues Thursday in the Pittsburgh region the second “equal day” of the year

Today will be the fourth consecutive day when rain showers will make their way in our region. In the previous 3 days, we saw 2.45 “of rain. I expect an additional half-pump to an inch of rain fall today, and that would put us more than 3 inches of rain over four days.

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This will certainly help to remove a large piece of what has aggravated the drought conditions. The rain has also been stable, which also helps. New weekly drought cards come out at 8:30 am this morning, but they will only have rain on Tuesday at 8 a.m. and before. This means that we will only get partial update about what our drought conditions look like.

While the rain slips today, the highest chance will be before noon, with just the dispersed rain expected for the afternoon and in the early evening. The sky will be mainly cloudy with a little sun sneak in the clouds this afternoon. Morning temperatures were in the 1960s with afternoon temperatures in the 1970s.

For the future, Friday will be dry. If you are in Pittsburgh or really almost everywhere in the North of the I-70, you will be dry this weekend. Places south of the I-70 will have a chance for isolated rain on Saturday and Sunday. High temperatures on weekends will remain in the mid-1970s with low in the 1950s.

Happy semi-annual day! The sunrise and the sunset today are both at 7:12 am. One obviously at 7:12 a.m. and the second at 7:12 p.m.

Why do we see equal days?

Well, if you think it should be partly due to the falling equinox, you would be right. The falling equinox, similar to the spring equinox, occurs when the sun is directly parallel to the axis of the earth. Some will say that if you draw a line through the poles of the earth, it would make an angle at 90 degrees with a line from the center of the earth to the sun.

It is technically not exactly, but close. Let’s start with the earth and its inclination.

The earth is still tilted and the inclination is somewhere around 22.5 °. This inclination is still in the same direction during the year.

So this means that during the winter solstice, our North Pole is leaning away from the sun as much as possible. During the summer solstice, our North Pole looks directly towards the sun. This means that when we arrive halfway (the equinoxes), this “meager” of the earth is pointed on an angle of 90 degrees compared to the sun. But the angle of everyone is not perfectly 90 degrees at that time, with various “equal days” which occur 4 days before or after the bi-annual equinoxes.

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