Hawaii, Alaska and Puerto Rico: The week was mostly drier than normal at most stations in Alaska and Hawaii, but no change was made to the depiction there. It was another dry week for much of Puerto Rico, with accumulated deficits exceeding 8 inches for the last two months. D0 was added to the western and eastern sections of the island which were persistently drier than normal out to 90 to 180 days and where below-normal streamflows were beginning to appear.
Looking Ahead: Beneficial rains could continue from the Gulf of Mexico coast to Mid-Atlantic States during July 18-23, with amounts in excess of two inches in places. Some of these rains could spread into the eastern sections of the Tennessee and Ohio valleys. Monsoon showers are expected in the Southwest and showers and thunderstorms may develop with fronts moving across the northern tier states, although rainfall amounts should generally be less than an inch in these areas. The southern to central Plains will likely be devoid of precipitation. Temperatures for much of the country east of the Rockies will be above normal, with departures possibly 10 to 15 degrees above normal from the central Plains to Great Lakes.
For July 24-August 1, dry weather is expected to dominate in the southern to central Plains, across the Gulf coast, and along the west coast, while monsoon showers should bring above normal precipitation to the Southwest. Above-normal temperatures should maintain their hold across the interior U.S. from the Plains to Southeast, with cooler-than-normal conditions along the west coast. Alaska is forecast to be wet with above-normal temperatures in the northeast and cooler-than-normal conditions in the west and south.
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)