May 22, 2015 May rainfall has been mostly 1 1/2 to 2 1/2 inches so
far with the least in western Virginia and the most around parts of
the Chesapeake Bay. Temperatures continue to be quite warm running
several degrees above normal. Over the past 90 days, precipitation
has been near normal for many areas plus or minus and inch or two.
West-central Virginia is 2 to 4 inches above. Parts of western
Maryland have been 2 to 3 inches below normal.
Current (May 22) streamflow data from the U.S. Geological Survey
shows that streamflows are near or below normal in Maryland, Delaware,
Virginia, and the eastern panhandle of West Virginia. Groundwater
levels are generally near normal.
The weather outlook into early June calls below normal rainfall for
the first half of the outlook but then near or possibly above normal
rainfall for the second half of the outlook. Temperatures are
expected to be above or much above normal. The NWS Climate Prediction
Center's 30 day outlook for June calls for near normal rainfall along
with near or above average temperatures. The 90 day outlook for June
through August calls for near average precipitation and near normal
The outlook for water resources and water supplies is good for most
of the southern portion of the MARFC service area. The outlook is
good to fair for northern Maryland into Delaware. Recent rainfall
over the past several weeks and rainfall expectations indicate that a
dry spell has started. Though still short term, if this overall
dryness continues, then longer term deficits will grow and effects
will begin, such as low streamflows, low groundwater, and dry soils.
Changes to the outlook for water resources and supplies could occur if
the expectations for rainfall do not materialize.