April 17, 2015 April precipitation has been quite heavy so far in
southern New York and the northern half of Pennsylvania where 1 1/2 to
3 inches has already fallen. For the southern half of Pennsylvania
and New Jersey, much less has fallen and has ranged from 1/2 to about
1 inch (though up to 2 inches has fallen in southern-most New Jersey).
Temperatures so far in April have been 1 to 3 degrees above normal in
southern New York, the eastern half of Pennsylvania, and in New
Jersey. But the western half of Pennsylvania has been much warmer
averaging 4 to 6 degrees above. Over the past 90 days, precipitation
for southern New York, most of Pennsylvania, and northern New Jersey
has been 1 1/2 to 4 inches below average. Southeastern-most
Pennsylvania and the rest of New Jersey have been 1 to 2 inches above
The 2014-2015 snow season has ended.
Current (April 17) streamflow data from the U.S. Geological Survey
shows that streamflows are near normal in southern New York, the
northern two thirds of Pennsylvania, and the southern half of New
Jersey. Flows are below normal for the southern third of Pennsylvania
and the southern half of New Jersey. Groundwater levels are near or
The weather outlook for the rest of April calls for near or above
average rainfall. Temperatures are expected to be above average
through the beginning few days of the period but then trend to below
average after that. The NWS Climate Prediction Center's 30 day outlook
for May calls for near average rainfall and near or below normal
temperatures. The 90 day outlook for May through July calls for near
average precipitation and temperatures.
The outlook for water resources and water supplies is good across
southern New York, Pennsylvania, and New Jersey. Though longer term
precipitation deficits persist in many areas, recent rainfall and
melting snow has offset these deficits. These deficits are beginning
to slowly decrease especially with above average precipitation
expected to continue for the next couple of weeks.