Once upon a time — at least 20 pounds and a decent quantity of decent muscle mass ago — I used to do long, long bike rides. The kind where you’d be out all day, sometimes all weekend, sometimes longer. A natural obsession attached to these rides: Would it be raining? Would it be hot? Would there be unfriendly winds. None of those factors would typically dictate whether you’d do a ride or not, but it was an important factor in planning and indulging your worst bad-weather anxiety.
So now, we’re driving across the western United States with the idea that we’ll see the August 21 eclipse in the general area of Nebraska Sand Hills. We’re about halfway there now, and we’re starting to take the weather forecasts seriously. And while I normally wouldn’t care about the weather in a place I’m visiting — It’s cloudy? Is that a problem? — the forecast for Greater Western Nebraska isn’t so sunny right now.
In fact, if you read the forecast discussions for the four National Weather Service offices handling forecast for the area from the Idaho Rockies to the west-central Nebraska, the word “pessimism” has crept into the several-times-daily notes. Three examples (and about the jargon: GFS, ECM and European are all forecaster shorthand for supercomputer-driven numerical weather models; 12Z (or other numbers) refers to the time the most recent model run was completed in UTC (universal) time (Z stands for Zulu, and apparently comes from military usage):
Pocatello, Idaho: GFS and European continue to offer up different
solutions. GFS is more pessimistic for us. It monsoonal moisture into the region Sunday. This could produce viewing issues for the eclipse in terms of scattered areas of clouds and showers. The European on the other hand keeps the monsoonal moisture south of us for Sunday and Monday and provides much better viewing for the eclipse. The forecast favors the pessimistic solution and includes partly cloudy skies with slight chances of showers and thunderstorms. At this point, we do think the eclipse will be viewable, but there may be a few clouds in some areas. However the consensus models are leaning more towards the European solution so hopefully the GFS will move into that direction as well within the next couple of runs. Forecast for Tuesday and beyond continues to look unsettled. Even the European draws monsoonal moisture into our region for midweek.
Riverton, Wyoming: For Monday, Eclipse Day, the 12z model runs still indicate that a weak surface cold front is progged to move into the northwest portion of Wyoming and will bring with it some mid to high clouds into the region during the morning. The models seem to indicate that the frontal boundary should weaken and become diffuse during the day as it attempts to move southeast into the state. The low level southwest flow ahead of the boundary should also result in more low/mid level moisture and partly to mostly cloudy conditions expected across the forecast area from the morning into the afternoon. It is expected that there should be some isolated showers/storms over the western mountains due to expected slight instability.
Cheyenne, Wyoming: It continues to be a tricky cloud forecast for Eclipse Day (Monday) with west-southwest flow aloft and decent H7-H3 [upper atmospheric] moisture. There are still considerable differences though in the RH [relative humidity] fields, so opted to maintain a partly cloudy forecast for most areas.
North Platte, Nebraska: The cloud forecast Monday continues to evaluate the potential for high cloudiness which could partially obscure the eclipse.
The ECM and GFS shows subtropical moisture aloft moving across the Rockies which could produce scattered or broken high cloudiness around noon Monday. The GFS also indicates substantial low level moisture and stratus across Wrn/Ncntl Neb leftover from heavy thunderstorms across Ern Neb Sunday night. The ECM produces the thunderstorms across SD but shows the same moisture in place like the GFS. Thus, it is possible significant cloudiness will occur Monday.
As a result, the sky forecast for noon Monday has been increased from 35-40 percent yesterday, to 40 to 60 percent with the forecast today.
Important to remember: While the forecast models are sometimes shockingly good, they also miss. We’re more than 100 hours out from the eclipse right now, and there’s plenty of time for things to evolve. Right now, though, I’m rooting for monsoonal moisture to keep its ass parked well clear of the eclipse zone; the same for stray moisture and frontal boundaries and all other atmospheric interference with OUR EVENT OF A LIFETIME. You listening, cloudmakers?
Anyway. Isn’t this supposed to be a road trip?
We started out in Twin Falls, Idaho, today, walking through a mall to the Petco with, guaranteed, the most scenic view in all of Petco World. Or, it would be the most scenic view if the entrance was at the back of the store, because that’s where you can look down into the Snake River Canyon of Evel Knievel fame.
Alas, Evel is pulling his cheap stunts in the afterlife now (and maybe still getting upstaged by Richard Nixon). But there were base jumpers leaping, one after another, from the big beautiful steel arch bridge that carries U.S. 93 across the canyon. Here’s a video — watch it full screen — that sort of conveys what that was about:
At the visitors center, near the Petco and overlooking the bridge, I had a talk with a guy who arrived with a daypack and a longboard-style skateboard who confided early on, “I’m a bum. I live down in the canyon.” But what he really wanted was to talk about losing a camera over the side of the canyon rim earlier in the week. He also confided he was an old time base jumper who had gone off the high bridge outside Auburn many times (OK — he said 1,000 times).
After that, we headed up 93 and saw lots:
An aqueduct that a bunch of kids — wearing personal flotation devices, all of them — were getting ready to jump into for a 20-minute trip downstream.
A memorial to a guy who crashed in February off U.S. 26 on the edge of Craters of the Moon National Monument; the debris field from the crash was still present, as was a memorial to “The Highwayman.”
Lava. Lots of lava.
Arco, Idaho, which advertises itself as the first place in the world to use electricity generated by atomic power (circa 1955). The proprietor of the Lost River Valley espresso shack served us a latte and a cappuccino. We talked eclipse, since Arco is in the path. Was she bringing on extra help? Her sons would be there, she said. “I started this business for them — they’re both autistic. They’re home today. … They’re anxious about all the people who’ll be showing up. …”
Idaho Falls. Bought gas there. By the way, the mileage on a Toyota 4Runner — the only car Hertz had to give us after I asked for a small SUV — sucks.
The towns of Shoshone, Richfield, Carey …
The Snake River. Swan Valley. The Grand Tetons. Jackson Hole. And that’s where we are tonight.
Tomorrow? We have a reservation in Casper, Wyoming. We’ll be looking at the weather.