Monday 9 a.m.
A cold front moving through the Northeast is causing rain, but another large high pressure area is poised to take over in the Northeast by tonight. Northerly flow ahead of the high pressure area will bring in cooler air for tonight and tomorrow, but southerly winds behind the high will make it warmer Wednesday through Friday. The video has more.
It will turn humid across the western Great Lakes region on Wednesday, and a weak disturbance rippling through aloft may cause raise the chance of thunderstorms there. In the Middle and North Atlantic states, it will become warmer from Wednesday through Friday. After today, it seems unlikely to rain in the I95 corridor until the next cold front approaches late Friday or Saturday.
This pressure analysis suggests the cold front was on a line from Pennsylvania to Kentucky at 7 a.m. EDT.
A cold front that will cross the Northeast and Middle Atlantic states this afternoon and evening will trigger showers and, in some places, a thunderstorm. Once the front is offshore, a high pressure area from the Midwest will take over for the weekend.
This map shows the high pressure area that is promoting cool, dry weather in the Northeast today. The low pressure area on the left side of the map is associated with a cold front that will send showers eastward tomorrow.
With fine weather likely on most of the days ahead through early next week, leaf viewing will be a cool experience for many, especially in areas highlighted on this map showing the typical progression of peak fall colors:
This map is a forecast of the upper air flow early on Saturday, Oct. 16. It shows a mild to warm pattern for the Great Lakes and Northeast. The second map is for two weeks from today. Northern snow showers, anyone?
...with almost 16 inches of rain in Myrtle Beach, South Carolina, and more than 20 inches around Charleston. You don't find amounts like that anywhere in the historic record for this area. This picture shows the radar-estimated rainfall over South Carolina between Friday afternoon and mid morning today:
This map shows where Hurricane Joaquin was just before 8 a.m. ET. You can also see the stripe of clouds centered just of the Middle and North Atlantic coasts.