Pleasant weather is underway

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Summary

You just can’t order better weather for the end of August, folks. We are definitely getting that taste of fall that models have advertised for over a week. Get out and enjoy it!

This fall-like weather will continue on through tomorrow. By Saturday, temps and humidity will begin creeping up. That rise in heat and humidity will really be felt on Sunday. As that hot/humid airmass moves back in, we could see an isolated shower/storm on Saturday.

Sunday looks mostly dry at this point but hot, with humid highs in the 80s. We start bringing back afternoon/evening t-storm chances for Monday and Tuesday.

The bottom line is that fall is here today and tomorrow, followed by a transition back to summer that will be followed by several days of hot/humid summer-like conditions.

Tropics

We’ve got a little something to watch in the Atlantic again. It’s not even off the coast of Africa yet, but there are strong indications that this disturbance may develop into a storm in the Atlantic within the next 5 days.

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Records

As meteorologists, we always look at the atmosphere in layers. The surface is one of those layers. Sometimes, conditions are favorable for thunderstorms in the layers up off the surface, while the air here at the surface the air is too dry to support rainfall. The rain falls from clouds and evaporates before it hits the ground. This is called virga.

We don’t see that too much around here because we’re usually humid enough to allow rain to make it to the ground. In desert environments they see virga quite often.

Washington State is like us in that they are usually humid enough for rain to make it to the surface. However, on this day in 1970 their surface air was too dry for rain but conditions in the other layers of the atmosphere were favorable for storms. This resulted in thunderstorms that were producing lightning but no rainfall at the surface. The lightning doesn’t care how dry the air is at the surface.

This scenario led to an outbreak of wildfires across Washington state. By the time all was said and done, 100,000 acres had been torched.

This scenario sets wildfires across the Rocky Mountains quite often in the summer and fall months. The atmosphere supports storms, but dry air at the surface won’t allow the rain from the storms to make it to the surface. That means you get lots of lightning but no rainfall, which leads to wildfires.

News

Hurricane Lane will just miss most of the Hawaii islands, however, there will be significant impacts to many of the islands because of the storm’s close proximity to the islands. A storm need not make landfall to cause major problems. This is the worst storm to threaten them since 1992. You may follow live-streaming coverage from a tv station in Hawaii at https://www.facebook.com/khon2news/videos/332077104033068/

You all have a great day.

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