Surface Analysis, 8 AM EDT: The storm's peak winds and rain were exiting Baltimore at this time. The heavy rain shield remained highly asymmetric, concentrated west and north of center...as is typical for tropical systems undergoing extratropical transition. Dry air off the U.S. mainland was being swept into the southern half of Irene, evaporating rain and clouds there. The stationary front - initially over the Appalachians - began merging with the large wind circulation.
Rain Accumulation: Here are two scales of charts: Regional scale and local scale. Both maps are derived from radar estimates. These totals have yet to be compared with gauge estimates. Extreme point estimates may not be accurately measured by radar. But in general, the rain accumulation agrees quite well with the predictions for our region.