Travelers flying out of San Diego will encounter relatively tame weather across much of the nation through Thanksgiving Day — including the Bay Area and Pacific Northwest, which just took a damaging hit from a combined atmospheric river and bomb cyclone storm. It’ll also be quiet here in San Diego County, which will get barely measurable rain from late Tuesday to late Wednesday, the National Weather Service said. Most areas from the coast to the inland valleys will register only 0.10 inches of precipitation, allowing critically dry chaparral to wither further. So far, San Diego’s seasonal rainfall total is almost one inch below average at 0.13 inches. The weather will turn noticeably drier and warmer on Thursday, partly due to weak offshore winds. San Diego’s daytime high on Thanksgiving will be 66, a bit cooler than normal. Forecasters say heavier rain will fall in San Francisco on Tuesday and Wednesday — but it’s not the kind that disrupts air travel. Weaker rain will hit the major airports in Portland, Oregon, and in Seattle, while Phoenix and Las Vegas will be dry and unseasonably cool. And a large cold front will begin to spread across the Midwest — especially Chicago — and the Northeast late Thursday night and Friday and will deepen into the weekend. Much of the eastern seaboard will get rain ahead of the cold.