Sunday, January 08, 2006

Our Sci-Fi Weather

The Eureka Reporter reports the explanation by the National Weather Service for the sudden windstorm that devastated the Humboldt County electrical grid on December 31. Some people in less than remote places were without power for six days.

Several storms came through from the Pacific during Christmas week. By New Year's Eve morning the latest bout of heavy rains and constant winds had died down, only a weak storm was forecast for early in the new year, and most of the county was breathing a sigh of relief because it seemed the worst had passed and the grid got through it fine. But then at about 9:30 am winds that are estimated at up to 85 mph hit various parts of the area, and did the damage. They were brief, and didn't affect all areas.

Now the Weather Service says that it was such a rare weather event that there is no record of it happening in Humboldt before. A similiar situation happened in Portland, OR in the 90s, which weather types have been studying ever since.

It's called a bent-back occuluded front. In this case the storm had indeed passed--the front was in Montery to the south and Sacramento to the southeast. But "rapidly intensifying" low pressure in the ocean off our coast actually sucked the storm front back--the front "bent" back to the North Coast.

This explanation came in a story about why the NWS didn't issue a wind warning, not the most intelligent approach to the phenomenon, since it's not clear what the Emergency Alert would have done. Here's a classic graph on the outcome: But by the time they realized how strong the winds would be, it was too late, Dean [of the NWS] said. "The feeling at the time was that the winds had already started, so people already had the information that it was windy."

Yeah, good thinking. But what about this weird event? Nobody has seen it around here until the 1990s and now it's happened again. The conventional wisdom, especially in newspaperland (and especially in conservative Repub Bushloving newspaperland) is that weather is full of freak events. It's that tricky old Mother Nature, tsk tsk, hardy har har.

Well, some humility is certainly proper but global heating scenarios predict such freak weather, and if the oceans are warmer in places they weren't before, we may be in for more "freak" storms. For which, incidentally we are not well prepared, as this event makes clear. The power crews performed admirably afterwards, but the flow of timely information was spotty and inconsistent, and generally a failure. Missing the point even a week afterward ices that particular cake.

There was a terrible TV movie on a few months ago about a series of storms that wiped out various picturesque capitals of the world and threatened to be "the end of the world!" as the title indicated. It ran for something like 4 hours over two nights, so I taped it and we watched the highlights. Good popcorn trash tv, but science fiction is rarely without relevance to the undercurrents of mood in the present. Sci fi weather isn't just coming. We just had some.

1 comment:

Fred Mangels said...

I'm surprised no one has brought up an almost similar windstorm we had here back around '77, or thereabouts. I was a caretaker on a ranch up in Maple Creek at the time. High winds but no rain with it.

No warning at all. Seemed to catch everyone by surprise, but I can't say for sure as the only access I had to news or weather was a transistor radio.

I forget what time of year it was but I don't think it was winter cause it was too warm. It was a weird day. The wind was eerily calm and it seemed warmer than it should have been. Quite pleasant, actually, and the sunset was really something; the whole sky was reddish orange.

Wind picked up after dark and got stronger and stronger. By 9pm it was really blowing and you could hear trees snapping up and down the mountain. I was scared to death. I decided I should abandon my cabin, as it had a bunch of huge trees next to it. Figured I'd walk the mile or so to the bosses place and hide out there since he didn't have trees around his place.

Go outside and looked up using my flashlight and there was all kinds of stuff flying through the air including branches four inches thick. I figured I was stuck where I was for the night as too much debris was in the air to risk walking anywhere.

I just sat horrified in the cabin listening to some gal on KRED. She was great and they kept the station open after they would normally close for the night, giving updates on the situation. I remember her saying, "There's a lot of bad things happening out there, so stay home. We're going to go ahead and keep broadcasting to let you know what's happening..." I loved that gal. She was the only human "contact" I had that night.

Winds finally settled down around one or two am. Word was that someone on Kneeland clocked winds of 90mph. Power was out for at least three days in some areas of Eureka. Probably longer elsewhere. Didn't affect me, really, cause my cabin didn't have electricity or running water anyway.

That was one big blow.