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The mild and dry conditions will likely persist through the end of October as ridging continues to dominate the pattern over the Eastern U.S.. This week (October 16-22), it will be sunny and dry everyday due to a large dome of high pressure sitting overhead.
This bubble of high pressure will may contribute to the potential development of a drought within the next two weeks. For the month of October, rainfall is over an inch below average and for the year-to-date precipitation, we are approaching four inches below average. The Climate Prediction Center is forecasting for below average precipitation this week and at least early next week through October 25th.
There are some signs that this relentless pattern of above average temperatures and very dry weather will come to an end by the start of November or perhaps even earlier around Halloween. The models, like the European which I personally like, continue to hint at a reverse in the pattern with a ridge over the west and a trough over the East. Typically, troughs provide cooler temperatures and wetter weather -- Something we have not seen is quite some time.
One of the mains reasons for this pattern change is actually related to what's happening over the western Pacific. Multiple typhoons, which are the same as hurricanes but are given a different name because they form over a different ocean, are forecast to develop during the second half of October. Many times when these typhoons get to latitudes north of 40°N, it begins to disrupt the jet stream pattern, therefore disrupting our weather over the Lower 48.
If you enjoy the warmth, enjoy the weather the rest of this October because changes may be on the way as we get into November.