During the first 30 days of March, officially 0.52 inches of rain was measured officially at the Philadelphia International Airport.
Already, Philly has picked up more rain this morning than it did in those 30 dry days, including 0.43 between 9 a.m. and 10 a.m. Pottstown weighed in with 0.48 for the hour.
To use a standard measure of comparison, that would be the equivalent about 5 inches of snow falling in an hour. That's been known to happen, but not in May.
The rain looks to back off for several hours once this line ripples through, and right now it appears that it will stay dry in South Philly for the Phillies-Astros game this afternoon.