Grid Point #: 011973 
Longitude:   -77.4224
Latitude:     39.3552
Contributing Station, distance (km).
MDDM   19.9
HB16   21.6
LOY9   23.9
MAS6   29.5
LOY4   29.6
ZDC1   30.0
VAAH   33.0
HAG5   33.4
DEW5   36.4
DEW3   42.9