South: Abnormal dryness was erased from southern Mississippi this week, thanks to Alberto’s rains. In contrast, recent heat and dryness promoted the expansion of D0 across northwest Louisiana and western Arkansas. The 30-day ACIS SPI has values of -1 to -2 in general across the Arklatex region. A major overhaul of the drought depiction in Texas was rendered this week, with some areas showing improvement and others showing deterioration. Recent rain in parts of western Oklahoma favored small-scale improvements in the core drought region, while the lack of significant rain in parts of eastern Oklahoma warranted one-category deterioration.
Looking Ahead: For the ensuing 5-day period (May 31-June 4, 2018), most predicted heavy rain areas (1.5-3.0 inches or greater) are expected to be east of the Mississippi River, where little dryness and drought currently exist. West of the Mississippi River, smaller-scale heavy rain areas of a convective nature are forecast over North Dakota, Nebraska, and southwestern Missouri. For the subsequent 5-day period (June 5-9, 2018), CPC predicts elevated odds of near to below normal precipitation for most of the Lower 48 states. Exceptions include in and around the Florida Panhandle, Minnesota and parts of adjacent states, and much of Arizona and New Mexico, where odds favor above normal precipitation.