It doesn’t get much longer than this 6 day journey from southern California to Cape Cod. It will be a 3107 mile drive, and we will be able to average a 65.2mph pace, which means our first 5 days will average 521.5 miles. This is going to be a pretty long trip.
As we leave tomorrow morning, we will likely be in the midst of some marine layer activity. Patchy fog will be a possibility all the way up the 5 towards LA, but when we get to the eastern side of the San Bernadino Mountains, life will be good. In our wake, drizzle chances will increase in San Diego, but our drive through the desert will be, get this, dry. The day will end in southwestern Utah in the town of Paragonah.
The low developing off of San Francisco Bay is going to move slightly inland, and a southerly flow will give way to the first monsoon day of the Rckies for the Spring just as we are driving through. Rain and thunderstorms will become increasingly likely in the Colorado Rockies, particularly west of the Loveland Pass, where we will spend most of our time on Monday in Colorado. There is a shot at some light rain early in the day along the Wasatch as well, but we won’t spend enough time there for it to be terribly likely, and the rest of Utah will be an arid wasteland. We will call it a night, probably a dry night, in Dumont, Colorado, not long after we get through the Pass.
This malformed wave will try to move out of the Rockies, and after the monstrosities we have seen this winter, it seems odd to think that of all things, THIS system will be producing any weather. But alas, with the advance of warm air, stratiform rain showers will move to cover most of Nebraska and eastern Colorado. We will try to dodge this precipitation throughout the day, and there might even be a rumble of thunder embedded in one of the scattered showers. I find it hard to believe that the wet weather will be problematic or severe. The day will end in Greenwood, Nebraska, which is a few clicks past Lincoln.
The relatively disorganized but active pattern will continue. There is a decent enough chance for rain early in the day, until we reach Iowa, after which point clearing skies and warmer temperatures can be expected. That slow moving trough that is lumbering through the southeast is going to try to meet us in the Great Lakes on Wednesday. Scattered showers will return in Illinois and continue as we stop for the night in Hobart, Indiana. That’s frustrating.
We are between two weak areas of low pressure. There should be enough juice for some clouds, but not enough energy to do anything beyond that. Sure, maybe some drizzle in the morning before the really dense clouds burn off, but it will be gone by the time we set out through northern Indiana, Ohio and Pennsylvania. The low that was once a cut off trough and will, by Thursday be an amorphous rain blob, will mosey on into western New York by the time we arrive in Pembroke, which is east of Buffalo.
Almost there! Overnight the remnant trough will hook up with the jet stream again at long last and rocket off to the northeast giving us a mostly clear drive to Barnstable. The models are a little tentative this far out, and there is a lot of green on the forecast maps, but this is attributable to uncertainty. That said, the little slice of America we are driving through on Friday will be one of the best spots in the country for avoiding wet weather. The best bet to get wet is to jump in a sailboat at Hyannisport.