In this Assessment, degree day and temperature statistics are based on areally-averaged numbers for each of 102 climate regions of approximately equal area that cover the contiguous 48 states. The first three weeks of May brought above-normal temperatures to all but the southeastern and northwestern fringes of the lower 48 states, but a dramatic change is expected for the next 7 days. CDD anomalies below -20 are anticipated in many areas from the southern half of the Plains to the south Atlantic coast, with 35 to 50 fewer CDD's than normal expected in the southeastern Great Plains, lower Mississippi Valley, and adjacent aections of western Tennessee and northern Alabama. Only the desert Southwest and central California are expected to tally significantly above-normal CDD totals. The sum of each day's degree day forecast in each of 102 climate regions that cover the contiguous 48 states.
Negative numbers reflect less energy demand than normal.
Maps Publication of the web team, Climate Prediction Center.