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Posted at 02:00 PM ET, 09/30/2010

Rain takes a brief breather, flood risk continues

New wave tonight may bring more floods, especially east

* Flash Flood Warning 'til 4:30 p.m. ('til 6:15 p.m. far N & NE burbs) *
* Tornado watch for eastern counties until 7 p.m. (map) *
* Storm impact coverage: PostLocal | Live chat transcript *
* Flash Flood Watch thru tonight | Share photos | Dr. Gridlock *
* Outside now? Radar, temperatures & more: Weather Wall *
* Citizen observer rain totals: VA, MD | NWS Mesonet rain totals *

Rain is starting to diminish in coverage and intensity from south to north, after a general 2 to 4.5 inches since last night. The big exception is around the Chesapeake Bay - primarily counties on the west side - where totals have reached 5 to 8 inches.

Though rain is currently on the decrease in many locations, scattered showers remain likely through the afternoon. More importantly, a second wave -- positioned near the North Carolina/South Carolina coast -- is beginning to surge north. This wave, also rich in deep tropical moisture, may bring another round of torrential rain tonight - particularly along and east of I-95.

Significantly, locations in the eastern suburbs near the Bay, that have already received extreme rainfall totals, are likely in for a double whammy. A few spots near the Bay could end up with double digit rainfall totals (10+"). The immediate metro region will be on the western edge of this second wave and could receive either a lot (1 to 3 more inches) or a little (less than an inch) more. But rainfall potential decreases the further west in the suburbs you go. For example, Loudoun and Frederick counties may not see a lot more rain - but are not entirely out of the woods.

Stay tuned for additional updates this afternoon and evening.

By  |  02:00 PM ET, 09/30/2010

Categories:  Floods, Floods

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