The greatest threat Sandy poses to the Washington, D.C. area is damaging winds and to some extent flooding rainfall.
While Sandy will be at sea this weekend, a last-minute left hook scenario is becoming more likely.
How nasty wind and rain would be in the District and nearby areas on the I-95 corridor will depend on where landfall occurs. A landfall in New England would have much less impact than a westward landfall across the Delmarva.
At this point it appears a doomsday track northwestward across southeastern Virginia is not so likely in terms of tidal concerns on the Chesapeake Bay and the Potomac River. The wind flow would not be right for such an event.
However, a westward path over the Delmarva would bring serious coastal flooding and wind damage to the beaches. The same path would bring locally heavy rain, flash and urban flooding potential on the western flank of the storm, in the Washington, D.C. and Baltimore areas.
Even if Sandy cruises into New England, a period of strong west to northwest winds could develop over Virginia and Maryland as colder air rushes in, perhaps enough to cause downed tree limbs and power outages.
Ripple-effect flight delays could build Monday and Tuesday from the Midwest to the South caused by direct impact from Philadelphia northward to New York City and Boston.
Joaquin continues its journey across the northern Atlantic toward Europe, where it is expected to impact Spain and Portugal this weekend.
Winter will kick off with mild weather in the Northeast and mid-Atlantic as an intensifying El Nino influences the weather pattern across the country.
A fall-like weekend is in store for the Northeast, after rain and thunderstorms will dampen the region on Friday.
Another round of rain is expected to move through the Carolinas on Saturday, which may lead to rises on some small streams and creeks.
Oho will hit parts of British Columbia and Alaska with drenching rain, gusty winds and pounding seas before the week comes to an end.
The East (1988)
Big early season chill Philadelphia 35 (tied record) Atlantic City 30 Newark, NJ 35 Bridgeport, CT 31 Hartford, CT 28
Binghamton, NY (2000)
1" of snow - the earliest date on record an inch or more of snow has fallen.
San Antonio, TX (2000)
A high temperature of 45 degrees (the average high on this date is 84 degrees).