• September 2019 National Weather Summary

    From jgmunley55@gmail.com@21:1/5 to All on Sat Oct 26 16:05:28 2019
    NATIONAL WEATHER SUMMARY

    SEPTEMBER 2019

    1-7: spotty showers were generally confined to the North, West, and southern Texas. The rainfall in Texas was related to short-lived Tropical Storm Fernand, which made landfall in northeastern Mexico on September 4 with maximum sustained winds near 45
    mph. Farther north, cool, showery weather prevailed in the Great Lakes and Northeastern States. Weekly temperatures averaged as much as 5°F below normal from eastern North Dakota to Maine. A broader area covering the Midwest experienced near- or
    below-normal temperatures for the seventh week in a row. Weekly temperatures averaged more than 10°F above normal in parts of the West and were at least 5°F above normal in many locations from the central and southern Plains into the Southeast. From
    the southern Plains to the southern Appalachians. A record-setting heat wave gripped the West in early September. In fact, September 1 featured monthly record-tying highs in Salt Lake City, UT (100°F), and Alamosa, CO (87°F). On September 2, monthly
    record highs were established in locations such as Pueblo, CO (102°F); Denver, CO (100°F); and Casper, WY (98°F). Previous records in Pueblo and Casper, 101 and 97°F, respectively, had been originally set in September 1995. Prior to this year,
    Denver’s highest September reading had been 97°F, set on September 3, 2017, and several earlier dates. In addition, Denver’s previous latest triple-digit reading had occurred on August 16, 2002. Similarly, Billings, MT, experienced its latest
    triple-digit heat with a high of 101°F on September 4. Later, record-setting heat expanded into the East, where Vero Beach, FL, tied a monthly record with highs of 97°F on September 5 and 6. By September 7, daily-record, triple-digit highs affected a
    large area of the South, with temperatures rising to 103°F in Austin, TX, and 102°F in Vicksburg, MS, and Monroe, LA.

    8-14: An oscillating frontal boundary helped delineate between cool conditions in the North and parts of the West, and late-season heat across the South. In general, the boundary shifted northward late in the week, leaving much of the nation
    experiencing warm weather. Exceptions included the Pacific Northwest and parts of the Northeast, which remained (or turned) cool. Weekly temperatures averaged 5 to 10°F above normal in a broad area from the central and southern Plains into the Ohio
    Valley and much of the Southeast. Some of the hottest weather, relative to normal stretched from the northern Mississippi Delta to the central Appalachians. In contrast, weekly temperatures averaged at least 5°F below normal across parts of the
    Intermountain West, from eastern Montana into the upper Great Lakes region, and in northern New England.
    Persistent heat across the South led to dozens of daily-record highs and widespread triple-digit temperatures. The week opened with recordsetting highs for September 8 in locations such as El Dorado, AR (102°F); Shreveport, LA (102°F); Vicksburg, MS (
    100°F); and Montgomery, AL (100°F). In Texas, Austin (Bergstrom) reached or exceeded 100°F each day from September 2-9. On September 10, Jackson, KY, set a monthly record of 98°F; previously, the highest reading had been 96°F on September 3, 2011.
    On September 11 in Virginia, Blacksburg’s maximum temperature of 94°F was the highest reading in that location since July 1, 2012. On September 12-13, consecutive daily-record highs were established in Montgomery, AL (100°F both days); Chattanooga,
    TN (98 and 103°F, respectively); and Meridian, MS (100 and 102°F, respectively). Elsewhere in Mississippi, Vicksburg tallied a trio of daily-record highs (99, 100, and 99°F) from September 12-14. On September 12, late-season heat spread as far north
    as the mid-Atlantic, where daily-record highs reached 98°F in Washington, DC; Richmond, VA; and Charlotte, NC. Late in the week, hot weather briefly overspread parts of California, where daily-record highs soared to 103°F (on September 13) in Santa
    Cruz and 100°F (on September 14) in Modesto. Earlier in the week, chilly weather had resulted in a daily-record low (36°F on September 10) in Bishop, CA.

    15-21: Hotter-than-normal weather prevailed between the Rockies and Appalachians, with temperatures averaging at least 10°F above normal from the northern and central Plains into parts of the Midwest and mid-South. Slightly cooler weather covered the
    Atlantic Coast States. Elsewhere, cooler-than-normal conditions dominated the Far West, where weekly readings averaged at least 5°F below normal in portions of the Great Basin and the Pacific Coast States. In stark contrast, hot, dry weather gripped
    the Southeast. No rain fell during the first 21 days of September in Tennessee locations such as Jackson, Clarksville, and Memphis. In addition, Memphis reported highs of 90°F or greater each day from August 31 – September 22, a span of 23 days. In
    Kentucky, the first 3 weeks of September featured only a trace of rain in Lexington, Louisville, London, Paducah, and Bowling Green. During the first half of the week, extreme heat accompanied the dry conditions. With a high of 99°F on September 16,
    Cape Girardeau, MO, experienced its highest temperature since June 16, 2016, when it was 101°F. In Alabama, Montgomery’s highs of 103°F on September 17 and 18 represented the hottest weather in that location since August 2007. On September 18,
    daily-record, triple-digit highs soared to 102°F in Pensacola, FL, and Meridian, MS, and 101°F in Tallahassee, FL, and Greenwood, MS. With a high of 100°F on the 18th, Mobile, AL, achieved a triple-digit reading in September for the first time since
    1927. In Texas, Del Rio tallied a trio of daily-record highs (101, 104, and 104°F) from September 17-19. Late in the week, daily-record highs stretched as far north as Michigan, where temperatures on September 21 climbed to 88°F in Traverse City and
    87°F in Pellston. In contrast, a surge of cool air into the East resulted in scattered daily-record lows, including 31°F (on September 19) in Glens Falls, NY, and 46°F (on September 20) at Wallops Island, VA.

    22-28: Unrelenting late-season heat and dryness across the South promoted crop maturation and harvesting, but resulted in rapid drought intensification; poor pasture conditions; and negligible moisture for fall-sown crops. Effects of the hot dry
    conditions extended westward across portions of the southern Plains and northward into the Ohio Valley and mid-Atlantic. Weekly temperatures averaged at least 5 to 10°F above normal throughout the South, East, and lower Midwest. Readings occasionally
    reached or exceeded the 100-degree mark from Texas to Georgia.
    Numerous Southeastern daily-record highs were established, especially during the mid- to late-week period. From September 24-26, Jacksonville, FL (94, 96, and 97°F) registered three consecutive daily-record highs. Macon, GA, closed September with
    seven consecutive daily record highs (98, 99, 102, 102, 98, 97, and 100°F), starting on the 25th. Macon also experienced 22 September days with a high of 95°F or greater, breaking a 1925 record by a single day. Montgomery, AL, which noted a daily-
    record high of 100°F on the 26th, set a September record with 24 days of 95-degree heat. Montgomery’s monthly total of 7 triple-digit days was second only to September 1925, when there were 10 days of 100-degree heat. In North Carolina, highs soared
    to daily record levels on September 26 in Charlotte (95°F) and RaleighDurham (94°F). Elsewhere in the Southeast, three consecutive daily record highs were set from September 25-27 in Florida locations such as Pensacola (96°F each day) and
    Apalachicola (94, 95, and 92°F). Around mid-week, heat briefly affected northern and central California in advance of a cold front. On September 24-25, the San Francisco airport registered consecutive daily-record highs (94 and 96°F, respectively).
    On the 25th, daily-record highs in California soared to 100°F in Sacramento and 99°F in San Jose. Late in the week, heat continued across the South and spread into the lower Midwest. Cincinnati, OH, posted consecutive daily-record highs (91 and 93°F,
    respectively) on September 27-28.

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