An increasing frequency of downpours, on top of already locally heavy June rainfall, will raise the threat of flooding in part of the eastern third of the nation into the first week of July.
Initially, downpours will tend to be isolated and flooding will be limited to urban, poor drainage areas and right along small streams.
However, as the pattern continues to evolve and a swath of tropical downpours stalls in the region, flooding problems can become more extensive and common.
Some communities in the Midwest got a taste of what such a weather pattern can deliver Tuesday night into early Wednesday. Later Wednesday, flooding extended into parts of Pennsylvania and upstate New York.
The system from the Midwest will stall in the East and change its orientation from west to east to more southwest to northeast.
Runoff from additional rounds of heavy of rain, on a daily basis in some cases, could push rivers to high levels and perhaps minor flooding in the days ahead.
A stream of moisture from the Gulf of Mexico, Caribbean and the Atlantic will converge and may be compressed into bands of intense rainfall or a firehose effect. Downpours can repeat for hours and shift back and forth over states and counties therein from Florida to Georgia, the Carolinas, the Virginias, Delmarva, Pennsylvania, New York, New Jersey and New England.
In the fire hose effect, some days areas right along the coast will be hit and other days locations near I-95 or the Piedmont or Appalachians can be targeted.
A Bermuda high over the Atlantic and a building zone of high pressure in the West will create the swath of potentially flooding rainfall over the eastern third of the nation.
While rain will slice through portions of the Midwest and Northeast this week, it will interrupt the stretch of dry weather in store for most locations only briefly.
While waters will be slow to recede across flood-ravaged South Carolina, a stretch of dry weather will provide favorable conditions for cleanup efforts across the region.
One potential path for Joaquin will have the post-tropical cyclone reaching Ireland as early as Saturday.
Joaquin remains on track to make Europe its final destination with a part of the British Isles and western Europe first facing potential impacts this weekend.
The next round of rain for the Washington, D.C., and Baltimore areas will be at the end of the week into the start of the weekend.
Despite Hurricane Oho not making landfall across Hawaii, rough surf will rattle the islands into Friday.
Rotterdam, Netherlands (1981)
An F-28 airliner crashed, killing all aboard after apparently traversing a tornado shortly after take-off.
Honolulu, HI (1984)
Temperatures climbed to 94 degrees, establishing an all-time record high for October.
Jeddah, Saudi Arabia (1992)
109 degrees - an all time October record.