From James Munley@21:1/5 to All on Mon Dec 20 16:54:00 2021
NATIONAL WEATHER SUMMRY
1-6: Tranquil weather covered much of the country. In fact, dry weather dominated several regions, including the northern Plains, Midwest, and an area stretching from southern California to the southern High Plains.
Near to above normal temperatures prevailed throughout the western U.S., where readings averaged as much as 10°F above normal across the Intermountain West. In contrast, cool air settled across the South, East, and Midwest, holding weekly temperatures
as much as 10°F below normal and resulting in widespread freezes. In fact, freezes occurred in most areas along and north of a line from Arkansas to central North Carolina, effectively ending the 2021 growing season—except across the nation’s
southern tier. Despite the arrival of cooler weather late in the month, the warmest October on record was reported in Eastern locations such as Newark, NJ (average temperature of 64.4°F, or 6.9°F above normal) and Virginia’s Dulles Airport (63.6°F,
or 7.0°F above normal). Although widespread Midwestern and Northeastern freezes occurred on multiple days in early November, few records were set. However, on Sunday, November 7, Allentown, PA, posted a daily record-tying low of 23°F. When a late-week
coastal storm affected the southern Atlantic States, temperatures on November 5 remained below the 50-degree mark in locations such as Charleston, SC (high of 49°F), and Savannah, GA (48°F). Elsewhere in Georgia, Alma’s November 5 high of 49°F
represented its earliest-ever maximum temperature below the 50-degree mark (previously, 47°F on November 12, 1968). Farther west, record-setting warmth developed in the Southwest and surged across the High Plains. In Colorado, consecutive daily-record
highs occurred on November 6-7 in Colorado Springs (77°F both days) and Alamosa (68 and 70°F, respectively). Other daily-record highs for November 6 included 80°F in Denver, CO, and Winslow, AZ.
7-13: In the Northwest, precipitation extended inland to the northern Rockies and southward into northern California. Aside from some lingering cool air in the Southeast, temperatures rebounded to near- or above normal levels throughout the central and
eastern U.S. Some of the warmest weather, relative to normal, affected the upper Midwest, where weekly temperatures averaged as much as 10°F above normal. Near- or above-normal temperatures again prevailed in the West, with temperatures averaging up to
10°F above normal in the southern Great Basin and the Desert Southwest. Early-week temperatures surged across the central and southern Plains, with daily-record highs reported on November 7 in location such as Borger, TX (87°F); Garden City, KS (84°F);
and North Platte, NE (81°F). Meanwhile in Nevada, Las Vegas set a monthly record with a November 7 minimum temperature of 65°F. Las Vegas’ highest minimum temperature for the month previously had been 63°F, set on November 18, 2020, and several
earlier dates. In contrast, chilly weather lingered in the East, where Allentown, PA, posted a daily record-tying low (23°F) for November 7. Just 2 days later, however, Lynchburg, VA, tied a daily record for November 9 with a high of 79°F. Eastern
warmth continued for several days, with West Virginia locations such as Clarksburg (78°F) and Morgantown (77°F) notching daily-record highs for November 11. In the Northeast, record-setting highs for November 12 reached 69°F at New York’s LaGuardia
Airport and 67°F in Bridgeport, CT. During the second half of the week, record-setting warmth developed across southern California. On November 11-12, consecutive daily-record highs were established in California locations such as Burbank (90 and 94°F,
respectively), Camarillo (93 and 95°F), and Santa Ana (92 and 96°F). Starting on the 11th, Burbank reported four consecutive November highs of 90°F or greater for the first time since November 2-5, 1997. With a daily-record high of 92°F on November
12, San Diego, CA, reported its first reading above the 90-degree mark since October 2, 2020. Similarly, Los Angeles International Airport (LAX) tallied highs of 91°F on November 12 and 13, marking the first 90-degree readings in that location since
November 16, 2020—and first consecutive highs of 90°F or greater since October 1-2, 2020.
14-20: Across the remainder of the eastern half of the country, significant precipitation was limited to parts of the Northeast and southern sections of Texas and Florida.
Weekly temperatures averaged 5 to 10°F above normal across northern and central sections of the Rockies and Plains. Similar readings, at least 5°F above normal in many locations, stretched from southern California to the southern Plains. In fact,
generally mild weather from the Pacific Coast to the Plains contrasted with near- or below-normal temperatures in most areas from the Mississippi Valley eastward. The coolest weather, relative to normal, stretched from the eastern Corn Belt into the
middle Atlantic States.
From November 11-14, Burbank, CA, reported four consecutive highs of 90°F or greater for the first time since November 2-5, 1997. Burbank’s achieved a daily-record high on November 14 with a reading of 93°F. Elsewhere in California, daily-record
highs for the 14th included 96°F in Woodland Hills and 93°F in Palm Springs. Warmth also developed across Northwest, where consecutive daily-record highs occurred on November 14-15 in locations such as Yakima, WA (72 and 67°F), and Helena, MT (66 and
69°F). Farther south, consecutive daily record highs were set on November 15-16 in San Angelo, TX (86 and 87°F, respectively), and Roswell, NM (86 and 84°F). Other record-setting highs for November 15 included 79°F in Burlington, CO, and Goodland,
Russell, and Salina, KS. On November 16, highs soared to daily-record levels in Texas locations such as Childress (91°F), Lubbock (88°F), and Wichita Falls (87°F). Prior to 2021, Childress had reported single November days of 90-degree heat in only 8
other years: 1934, 1945, 1952, 2001, 2005, 2012, 2016, and 2017. The only later observance of a 90- degree reading in Childress was November 17, 2017, when the high reached 92°F. Warmth also briefly spread into the Midwest and East, where daily-record
highs surged to 78°F (on November 16) in Springfield, MO, and 78°F (on November 18) in Danville, VA.
21-27: Showers also extended southward through the Tennessee Valley and into the western and central Gulf Coast States, but rain fell only briefly. Late-season warmth aggravated the effects of ongoing dryness, leading to increased stress on a portion of
the wheat crop. By the end of November, soil moisture shortages were particularly acute in parts of Montana and on the central and southern High Plains. Mild, dry conditions also prevailed in the western U.S., excluding the Pacific Northwest and the
northernmost Rockies. In fact, no meaningful precipitation has fallen across northern and central California in more than a month, since the October 24-25 deluge.
Several days of cool weather throughout the eastern one-third of the country helped to hold weekly temperatures more than 5°F below normal in many locations from the lower Great Lakes region into the Southeast. Conversely, readings averaged at least 5
to 10°F above normal throughout the Plains, with some of the warmest weather, relative to normal, stretching from Montana to eastern Colorado and parts of Kansas. Several chilly days across the eastern U.S. led to freezes deep into the South, including
parts of northern Florida and southern sections of Alabama and Mississippi. Tallahassee, FL, reported a low of 27°F (not a record for the date) on November 24. In southern Georgia, the first freeze of the autumn occurred on the 24th in Valdosta (30°F)
and Albany (32°F). Farther north, early-week temperatures dipped below 0°F for the first time this season in parts of North Dakota and northern Minnesota. Sub-zero lows on November 25 included -5°F in International Falls, MN, and -1°F in Grand Forks,
ND. In contrast, highs soared to daily-record levels on November 21 in southern California locations such as Vista (89°F) and Newport Beach (85°F). Two days later, a surge of warmth across the Plains and Midwest resulted in record-setting highs for
November 23 in Valentine, NE (77°F); Burlington, CO (75°F); Goodland, KS (74°F); Sioux Falls, SD (68°F); and Sioux City, IA (68°F). Several days later, another round of impressive, late-season warmth overspread the western and central U.S. On
November 27-28, consecutive dailyrecord highs were established in Northwestern locations such as Portland, OR (63°F both days), and Olympia, WA (58°F both days). Elsewhere on the 27th, Topeka, KS, logged a daily-record high of 71°F—the sixth day
this month with a reading of 70°F or greater. For much of the week, southern California’s coastal ranges were plagued by gusty, offshore winds, accompanied by warm weather and low humidity levels, leading to an elevated wildfire threat. Some of the
highest winds (locally 70 to 90 mph) were observed on Thanksgiving Day, November 25. For example, a pre-dawn gust to 89 mph was clocked on the 25th in Browns Canyon, near Chatsworth, CA.