National Conditions: August 31, 2022 - September 6, 2022
This week brought many extreme events: drought, floods, wildfires, record heat. The heat and drought are fueling fires in California and the Northern Rockies. Meanwhile, rain and flooding have improved drought conditions in Texas and the Northeast. The area of the U.S. in drought has declined for 8 weeks in row.
On July 12, 44.98% of the U.S. was in drought. As of September 6, it's 36.96% of the U.S.
This Week's Drought Summary...
This U.S. Drought Monitor (USDM) week saw continued improvements on the map across areas of the South, including Texas, in response to another round of localized heavy rainfall during the past week. Overall, the recent rainfall in Texas throughout the past month has started to make a significant dent in the state’s drought conditions in some areas. In contrast, drought conditions intensified in areas of the central and northern Plains with additional degradations on this week’s map. In these areas, recent drought impact reports submitted to the National Drought Mitigation Center indicated drought-related impacts within the agricultural sector including reduced crop yields as well as deteriorating pasture and rangeland conditions. Out West, the big story of the past week has been the heat wave that has impacted the region with record-setting temperatures and critical fire-weather conditions. The hot temperatures and strong winds exacerbated conditions on the Mill Fire, which broke out in Northern California on Friday, forcing the evacuation of the town of Weed, California as well as neighboring communities. In Death Valley, California, high temperatures exceeded 125 deg F multiple times during the past week including on September 1st when the high temperature reached 127 deg F―potentially breaking the record for the hottest temperature ever recorded during September, according to preliminary reports. Elsewhere, shower activity in the Northeast led to isolated improvements in drought-affected areas of Massachusetts and Connecticut, while further to the south conditions deteriorated on the map in Delaware. In the Midwest, short-term precipitation deficits and declining soil moisture levels led to the expansion of areas of drought in northern Missouri and central Illinois.
The NWS WPC 7-Day Quantitative Precipitation Forecast (QPF) calls for moderate-to-heavy precipitation accumulations ranging from 2 to 5+ inches across areas of the Southeast including Georgia, Florida, and South Carolina. Likewise, 2 to 4+ inch accumulations are forecasted for areas of the Upper Midwest in Wisconsin and Upper Peninsula Michigan. Conversely, lighter accumulations (<1.5 inches) are expected across eastern portions of the South, Lower Midwest, Mid-Atlantic, and the southern extent of the Northeast. Out West, accumulations of less than an inch are expected in areas of Southern California including the Mojave Desert, Transverse Ranges, and the southern Sierra. Elsewhere, areas of the central Great Basin, Northern Arizona, and Northern Rockies are expected to receive modest rainfall accumulations.
The CPC 6-10-day Outlooks calls for a moderate-to-high probability of above-normal temperatures across the West, the Plains states, and along much of the Eastern Seaboard. Below-normal temperatures are expected across the Pacific Northwest and the Upper Midwest while there is a low-to-moderate probability of below-normal temperatures across areas of the South and Lower Midwest. In terms of precipitation, below-normal precipitation is expected across the South, Plains states, and Upper Midwest, whereas above-normal precipitation is expected across much of the West, and East Coast. In Alaska, above-normal precipitation is forecasted across much of the Interior, Southwest, and Southcentral, while areas of the southern Panhandle have a low-probability of below-normal precipitation.