Southern Plains

Southwest

Northern PlainsNorthern

Central Plains

Central GreatBasin

Ohio Valley

California

GreatLakes

Northeast

SoutheasternU.S.

Mid-Atlantic

UpperMississippi

Valley

NorthernRockies

LowerMississippi

Valley

MiddleMississippi

ValleyCentralRockies

TennesseeValley

PacificNorthwest

SouthernRockies

CentralAppalachians

SouthernAppalachians

Hawaii APRIL 2018IDP GIS

U.S. GEOGRAPHIC BOUNDARIES REFERENCE MAPNATIONAL WEATHER SERVICE

Puerto Rico and Virgin Islands

Alaska