Tropical moisture continued to stream into the Midsouth, around the western periphery of an upper-level ridge axis along the Carolina coast on September 12th. Numerous afternoon showers and thunderstorms resulted in heavy rain which produced flash flooding in the Corinth area.
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The episode as NWS MEG wrote it up.
Tropical moisture continued to stream into the Midsouth, around the western periphery of an upper-level ridge axis along the Carolina coast on September 12th. Numerous afternoon showers and thunderstorms resulted in heavy rain which produced flash flooding in the Corinth area.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Memphis, TN wrote its last area forecast discussion before the first event at Sep 12, 2:13 PM CST, 2 hours 9 minutes earlier.
Area Forecast Discussion National Weather Service Memphis TN 313 PM CDT Sat Sep 12 2020 .DISCUSSION... Tropical moisture connection will continue into the Midsouth on Sunday, around the western periphery of a ridge axis along the Carolina coast. This moisture axis will drop south slightly relative to today, in response to height falls and a weak frontal/dry air intrusion to areas north of I-40. Attention then turns to Tropical Storm Sally, which is forecast to reach hurricane strength off the LA/MS coast Monday evening. Sally will have limited impacts on the Midsouth early in the week, other than backed northeast surface flow and outer rain bands possibly affecting north MS. Too early to say with confidence, but Sally's remnant low will most likely track NNE east of the MS River, ahead of an upstream trof over the southern plains. Again, too early to pin down a post-landfall track. Current reasoning based on the ECMWF which has been the most consistent of the medium range models over the past few runs. Sally's eventual track aside, northwest flow aloft and cold frontal passage appear probably over the Midsouth late Thursday into Friday. Operational GFS remains an outlier depicting a 589 dm 500mb ridge center over Memphis, but the GFS ensemble average was in relatively tight agreement with the ECMWF. With Sally out of the picture, cooler dewpoints and nighttime lows may provide an early taste of autumn for the Midsouth next weekend. PWB && .AVIATION... 18Z TAFs As of 18Z, a cold front is located west of the MS River with showers and some thunderstorms continuing to develop across areas along and east of the MS River. Showers and thunderstorms will remain possible through the afternoon with some showers into the evening. VFR/MVFR conditions expected to become more persistent MVFR conditions late tonight into Sunday morning. Potential exists for some IFR conditions at MEM,MKL,TUP during this period but confidence isn't high enough in this TAF set to include at this time but will continue to monitor for inclusion in future sets. Winds will remain relatively light through the period. CJC && .MEG WATCHES/WARNINGS/ADVISORIES... AR...None. MO...None. MS...None. TN...None. &&
Hazardous Weather Outlook...UPDATED National Weather Service Memphis TN 319 PM CDT Sat Sep 12 2020 ARZ009-018-026>028-035-036-048-049-058-MOZ113-115-MSZ001>017- 020>024-TNZ001>004-019>022-048>055-088>092-132230- Alcorn-Benton MS-Benton TN-Calhoun-Carroll-Chester-Chickasaw-Clay- Coahoma-Craighead-Crittenden-Crockett-Cross-DeSoto-Decatur- Dunklin-Dyer-Fayette-Gibson-Greene-Hardeman-Hardin-Haywood- Henderson-Henry-Itawamba-Lafayette-Lake-Lauderdale-Lee AR-Lee MS- Madison-Marshall-McNairy-Mississippi-Monroe-Obion-Panola-Pemiscot- Phillips-Poinsett-Pontotoc-Prentiss-Quitman-Shelby-St. Francis- Tallahatchie-Tate-Tippah-Tipton-Tishomingo-Tunica-Union-Weakley- Yalobusha- 319 PM CDT Sat Sep 12 2020 This hazardous weather outlook is for portions of East Arkansas... the Missouri Bootheel...North Mississippi...and West Tennessee. .DAY ONE...This Afternoon and Tonight Showers and thunderstorms may produce locally heavy rainfall through late evening. This may result in minor flooding of low- lying and poor drainage areas. .DAYS TWO THROUGH SEVEN...Sunday through Friday The potential for locally heavy rainfall will continue along and ahead of a cold front, mainly affecting areas south of Interstate 40. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated at this time. PWB
The Columbus AFB radar (KGWX), 119 km away, was scanning. The volume nearest the first event began at 22:19 UTC.
1 flash flood. Local standard time, as filed.
Trained spotters reporting flooding along Shiloh road and nearby areas in northeast Corinth.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Mississippi in 2020Every state in 2020This day in weather historyWarnings in Mississippi, September 2020
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 921348.