Weekly Weather Summary: With cooler temperatures and greatly reduced evapotranspiration, this is normally the time of the year when precipitation greatly aids with the recharging of soil moisture and hydrologic conditions (as long as the ground or streams are not frozen). As the week commenced, a storm system in the middle Mississippi Valley quickly tracked northeastward off the New England Coast, but not before bringing light to moderate precipitation to the eastern third of the nation. Farther west, a strong storm system brought moderate to heavy precipitation to the Pacific Northwest. By the weekend, the western system had rapidly traversed to the Mississippi Valley but then stalled as a large dome of high pressure was entrenched over the East. As the period ended, the stalled system, now with an intense area of low pressure, slowly tracked northward from the South toward the eastern Great Lakes region, dumping widespread moderate to heavy precipitation on much of the eastern third of the U.S. Between the two storm systems, many stations from southeastern Texas to the Florida Panhandle and northward to the eastern Great Lakes region reported 2 or more inches of precipitation for the week. In contrast, it was mostly dry from southern California and the Great Basin northeastward into the northern Plains and upper Midwest. Temperatures averaged above to well above normal for most of the lower 48 States. In Hawaii, light to moderate showers were limited to the windward sides.
Southeast: Widespread moderate to heavy showers and thunderstorms (more than 2 inches, locally to 10 inches) provided at least a 1-category improvement of drought in much of the region. This included most of Louisiana (except the extreme northwestern and southeastern sections where an inch or less fell); Mississippi (except along the Gulf Coast); Alabama (but not in the southeast where about an inch fell and in the northwest where 30- and 60-day percentages remained between 50-75%); northern Georgia and small areas in the southeast; western and eastern South Carolina; and parts of southwestern and south-central North Carolina. Heaviest rains (4 to 10 inches) fell from northeastern Alabama and northwestern Georgia into east-central Tennessee and on the southern Appalachians in western North Carolina. In Arkansas, another wet week (0.5 to 1.5 inches, locally 1.5 to 3 inches in the extreme eastern sections) was enough to remove the lingering short-term D0, while 2 to 3 inches in western Tennessee alleviated D0 there. USGS 7-day average stream flows (ending Nov. 29) were generally at or above-normal levels where 2 or more inches of rain occurred. With a relatively wet Fall season across the region, short-term departures were relegated to western Louisiana and the east-central Gulf and southern Atlantic Coasts, although long-term deficits remained throughout the Southeast. In contrast, only the southern two-thirds of Florida and southeastern Louisiana escaped this week’s rains. Although November has been relatively dry in Florida, a very wet September and October has kept most of the state drought free.