Rain continues steadily this morning. For the most part the rains haven't been heavy enough to cause street flooding or stream and creek flooding. However, strong flow from the southeast has caused tidal waters to rise, prompting the National Weather Service to issue a Coastal Flood Warning now in effect through 3 a.m. tonight.
If you have any question about why we're expecting heavy rain through tomorrow night and possible flooding of streams and creeks, just look at the expanse of the cloud field (shown above) associated with the frontal system coming through over the next 36 hours.
As we mentioned in our forecast this morning, the National Weather Service has issued a Flood Watch for the metro region Wednesday night through Thursday night. The NWS is calling for up to 3" of rain - enough to send creeks and streams over their banks.
As reported recently in the Washington Post, a flood control plan is in the works to protect the Washington Mall and large sections of downtown DC by constructing large earthen berms and eight-foot high aluminum panels just west of the Mall near the Washington Monument (see enlarged map). But will this project alone offer anything close to a guarantee that DC's flood problems will become something of the past? No way!
After months of mostly dry, it's been quite the wet week. Yesterday, September 30, 2010, Baltimore added another big record to its list for the year -- the one-day rainfall record for the month. The 6.02" of rain that fell at Baltimore-Washington (BWI) in a 24 hour period surpassed the previous Sept. record of 5.97" on Sept. 24, 1912.
Intense rainfall, with rates as high as 1-2" an hour along the I-95 corridor, is dousing much of the metro region. Storm totals are now in the 3-6" range on average in the immediate metro area, with lamounts exceeding 8" from Baltimore south along the western side of the Bay. An additional 1-3" of rain is possible on top of what has already fallen.