Hawaii, Alaska and Puerto Rico: Below-normal precipitation at time scales ranging from 7 days (this week) to the last 6 months, combined with low streamflows and the development of three large wildfires, prompted the addition of an area of D0 to northwestern Alaska. Showers dropped generally an inch or less of rain across the Hawaiian Islands this week, with most stations averaging below dry season normal, but no change was made to the drought depiction. The week was drier than normal across eastern and northern Puerto Rico. This pattern holds for the month to date, but streamflow was generally near to above normal, so Puerto Rico remained drought-free.
Looking Ahead: During the June 21-25, 2012 time period, the Pacific Northwest coast, the central Plains to western Great Lakes, the mid to northern Atlantic Seaboard, Deep South Texas, and much of Florida can expect the highest probability of precipitation. Temperatures are forecast to be above normal from the intermountain West to the Great Plains and Southeast. For June 26-July 4, below-normal precipitation is expected across most of the West, southern and central Plains, Midwest, and mid-Atlantic states, with wetter-than-normal conditions expected in the northern Plains, New England, Florida, and from monsoon showers in the Southwest. Above-normal temperatures are predicted for most of the country except the west coast early in the period and the Northeast. Wetter-than-normal conditions are expected for southern parts of Alaska, warmer-than-normal for the northeast, and cooler-than-normal for the southern and western coastal areas.
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)