Highlights: Another round of locally heavy rain affected areas from the central and southern Plains to the East Coast, slowing fieldwork but maintaining abundant moisture reserves for immature summer crops. In the Midwest, some of the heaviest rain (4 inches or more) soaked southeastern Iowa and northern Illinois, causing local flooding. Farther east, the remnants of Tropical Storm Danny interacting with a cold front also triggered torrential rain, especially in coastal New England. Across the South, scattered showers caused generally minor disruptions in fieldwork activities such as corn and rice harvesting. Although a few showers developed across drought-stricken southern Texas, significant rain again largely bypassed the region. Meanwhile on the northern Plains, cool but mostly dry weather promoted spring wheat harvesting, which has been delayed by late crop maturation. Small grain harvesting also advanced in the Northwest under warm, mostly dry conditions. Elsewhere in the West, mostly dry weather and near- to above-normal temperatures favored fieldwork and crop development. However, dry conditions also contributed to an increase in fire activity and hampered wildfire containment efforts, especially in southern California. Weekly temperatures ranged from 3 to 6 degrees Fahrenheit above normal in parts of southern Texas and the interior Northwest, but were at least 3 to 6 degrees Fahrenheit below normal in many locations across the eastern half of the U.S. At week's end, chilly air resulted in patchy frost across the upper Midwest.

Early in the week, heat persisted across the central and southern Plains. On August 23, daily-record highs were set in locations such as Pueblo, CO (101 degrees Fahrenheit), and Dalhart, TX (99 degrees Fahrenheit). Meanwhile, extreme heat lingered across southern Texas, where McAllen (106 and 104 degrees Fahrenheit) and San Antonio (104 and 102 degrees Fahrenheit) opened the week with consecutive daily-record highs on August 23-24. In contrast, cool air settled across the Southeast, resulting in consecutive daily-record lows on August 24-25 in Mississippi locations such as Meridian (55 and 58 degrees Fahrenheit) and Vicksburg (55 and 57 degrees Fahrenheit). At mid-week, heat subsided on the southern Plains but expanded across the West. In Wichita Falls, TX (107 degrees Fahrenheit on August 26), Wednesday was the last of 4 consecutive days with triple-digit heat. Santa Ana, CA (102 degrees Fahrenheit), posted a daily-record high on August 26, the same day that the Station fire started in the San Gabriel Mountains north of Los Angeles. By the end of August, the Station fire had consumed more than 100,000 acres of vegetation and was only 5 percent contained. Other triple-digit, daily-record highs in southern California included 103 degrees Fahrenheit (on August 27) in Long Beach; 107 degrees Fahrenheit (on August 27) in Fullerton; and 117 degrees Fahrenheit (on August 28) in Palm Springs. On August 29, Santa Maria (104 degrees Fahrenheit) posted a monthly record high, previously established with a reading of 103 degrees Fahrenheit on August 28, 1962. Triple-digit heat also affected many other areas of the West, with late-week highs reaching 113 degrees Fahrenheit (from August 27-29) in Phoenix, AZ, and 102 degrees Fahrenheit (on August 28) in Boise, ID. Farther east, however, chilly air settled across the Plains and Midwest. International Falls, MN (34 and 32 degrees Fahrenheit), posted consecutive daily-record lows on August 29-30. Elsewhere on August 30, daily-record lows included 37 degrees Fahrenheit in Sisseton, SD, and 38 degrees Fahrenheit in Grand Forks, ND.

Heavy precipitation lingered on August 23 in coastal New England, where Portland, ME, netted 2.97 inches of rain and reported a westerly wind gust to 48 miles per hour. Portland's summer rainfall totaled 22.31 inches (231 percent of normal), surpassing its June-August 1991 mark of 19.04 inches. Meanwhile, showers dotted the Intermountain West. Summer rainfall climbed to 6.88 inches (307 percent of normal) in Pocatello, ID, shattering its June-August 1968 and 1993 standard of 5.92 inches. By mid-week, heavy showers developed across the Nation's mid-section. On August 26, Hastings, NE (4.09 inches), experienced its eighth-wettest day on record, while Rockford, IL (2.75 inches), netted a daily-record rainfall. From August 25-27, Cedar Rapids, IA, endured 7.15 inches of rain. Later, heavy rain spread into the Southeast, where Pensacola, FL (3.16 inches), and Knoxville, TN (2.79 inches), received record-setting totals for August 27. At week's end, locally heavy showers lingered from the Great Lakes region into the Northeast. In Michigan, daily-record totals for August 29 included 1.71 inches in Alpena and 1.64 inches in Marquette. Although Tropical Storm Danny was absorbed by a cold front prior to reaching New England, the former tropical system contributed to another round of rain and gusty winds. On August 29, Bangor, ME, measured a daily-record rainfall of 2.08 inches, while a wind gust to 61 miles per hour was clocked just off the Massachusetts coast on Horseshoe Shoal in Nantucket Sound.