SoutheastĪn upper-level low moved in a retrograde motion from the Atlantic Ocean onto the southeast U.S.
Abnormal dryness contracted in the Delmarva but was added in western New York and expanded along the New England coast based on low streamflows, drying soils, and low precipitation for the last 3 months. But coastal New England and parts of western New York received less than half an inch. Half an inch or more of precipitation fell across a large part of the Northeast, with locally 2 inches in parts of northern New York, in Vermont and New Hampshire, and in the Delmarva. Drought or abnormal dryness expanded or intensified where it continued dry, especially in the Southwest, southern to central Plains, Southeast, and parts of the Northeast. Drought or abnormal dryness contracted where precipitation was above normal, especially in the Northwest, northern Plains, and Mid-Atlantic. The continued lack of precipitation further dried soils, lowered stream levels, and stressed crops and other vegetation, while the excessively warm temperatures increased evapotranspiration and added to the stress. The week was drier than normal across the rest of the CONUS. The fronts, lows, and upper-level troughs brought above-normal precipitation to parts of the Pacific Northwest, northern Plains to western Great Lakes, and spotty areas in the South, New England, and along the Atlantic Coast. Weekly temperatures averaged much warmer than normal beneath the ridge and cooler than normal in the West beneath the trough. The trough moved east as the week progressed, dragging a surface low pressure system and cold fronts across the northern Plains to Great Lakes, while another upper-level low moved over the Southeast and weakened. Drought Monitor (USDM) week, while an upper-level trough dominated the West. (CONUS), from the southern Plains to Northeast, at the beginning of this U.S. In the upper levels of the atmosphere, a strong ridge of high pressure dominated the contiguous U.S.