Rain relief coming
From the National Weather Service 7/11 6 am
SHORT TERM /FRIDAY THROUGH SATURDAY NIGHT/...
Frontal boundary remains along the East Coast into the weekend.
Abundant low level moisture will stream into the Northeast and
Mid-Atlantic with surface dew points well in the 70s and PWATs
in excess of 2 inches. There will be a fair amount of
instability during the daylight hours with SB CAPE values
upwards of 1500 J/kg, but 0-6 km Bulk Shear will be fairly low,
generally less than 20 kt. As a result, can expect heavy rain
and localized flash flooding as storms will be fairly slow to
move and training of storms will develop.
WPC Day 2 Excessive Rainfall Outlook for Friday and Friday
night has a Marginal Risk (1 out of 4) for northern New Jersey
and southeast Pennsylvania and a Slight Risk (2 out of 4) for
southern New Jersey and Delmarva.
The first low tracks along the coast on Friday and departs
Saturday night. A secondary low will follow behind it on
Saturday. Model guidance has it a bit warmer on Saturday
compared to Friday, with highs in the low to mid 80s on Friday
and in the mid to upper 80s on Saturday. The warmer temperatures
on Saturday may give way to a bit more convection.
Total rainfall Friday and Friday night will range from 1 to 2
inches across Delmarva and southern New Jersey, and generally
1/2 to 1 inch for for southeast Pennsylvania and northern New
Jersey. On Saturday and Saturday night, widespread rainfall
should be lower as the secondary low may pass just east of the
local area, with 1/2 to 3/4 inch of rain for Delmarva and
southeast New Jersey and 1/4 inch or so elsewhere.