Hawaii, Alaska and Puerto Rico: Continued below-normal precipitation, combined with above-normal temperatures, below-normal streamflow and spreading large wildfires, contributed to the expansion of D0 into northeast and east central Alaska. It was another drier-than-normal week for Puerto Rico, but streamflows continued generally near normal, so the island remained free of a drought or abnormally dry designation. The rainfall pattern in Hawaii was mixed, with many windward stations receiving 3 inches or more of rain while the leeward stations were drier than normal with only a few tenths of an inch of rainfall. No new drought impacts were reported, so no change was made to the drought depiction.
Looking Ahead: During the June 28-July 2, 2012 time period, a high pressure ridge is forecast to dominate the central and eastern United States. Showers and thunderstorms may develop along the northern and western fringe of the ridge, bringing a chance for rain to states in an arc from New Mexico to the Dakotas to Ohio, with the greatest chance for half an inch or more total from eastern Nebraska to northern Illinois. Rain is possible in the Pacific Northwest and in the Northeast, southern Texas, and southern Florida. Otherwise, conditions will be very dry. Very hot temperatures will affect most of the country from the Intermountain Basin to the East Coast. This temperature pattern is expected to continue for July 3-11, with below-normal precipitation stretching from the Intermountain Basin to the central and southern Plains, across the Midwest, to the interior Northeast. Above-normal precipitation may occur over New Mexico, from coastal Florida to South Carolina, and (early in the period) over the Upper Mississippi Valley. Northern Alaska is expected to be drier and warmer than normal, and southern coastal Alaska wetter and cooler than normal.
Author: Richard Heim, National Climatic Data Center, NOAA
D0 ... Abnormally Dry ... used for areas showing dryness but not yet in drought, or for areas recovering from drought.
Drought Intensity Categories
D1 ... Moderate Drought
D2 ... Severe Drought
D3 ... Extreme Drought
D4 ... Exceptional Drought
Drought or Dryness Types
S ... Short-Term, typically <6 months (e.g. agricultural, grasslands)
L ... Long-Term, typically >6 months (e.g. hydrology, ecology)