An upper-level disturbance moving across the Mid-South kicked off an area of showers and thunderstorms across Northeast Mississippi during the afternoon hours on August 30th. Some flash flooding was reported in Prentiss County.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS MEG wrote it up.
An upper-level disturbance moving across the Mid-South kicked off an area of showers and thunderstorms across Northeast Mississippi during the afternoon hours on August 30th. Some flash flooding was reported in Prentiss County.
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 Aug 30, 1:53 PM CST, 7 minutes earlier.
Area Forecast Discussion National Weather Service Memphis TN 253 PM CDT Sun Aug 30 2020 .DISCUSSION... Its significantly cooler across the Midsouth today. A cold front made it nearly half way through the Midsouth before retreating northward in response to an approaching shortwave trough. This shortwave followed by another shortwave is expected to result in an increasing coverage of showers and thunderstorms this afternoon and overnight. Widespread severe storms are not expected due to lack of instability, but a few strong, possibly severe thunderstorms are possible. The main threat would be damaging wind. The Storm Prediction Center has nearly all of the Midsouth in a Marginal Risk for Severe thunderstorms this afternoon and Tonight. Tomorrow we will see a trough begin to deepen over the Western US which will become quite deep and feature a cutoff low over New Mexico by Wednesday. The Longwave trough and cutoff low will slowly shift East out of the Desert Southwest and across the Plains possibly not approaching the Midsouth until Friday. As a result the Midsouth will be under Southwest flow for a long period of time Tuesday, possibly through Friday. The Storm Prediction Center has most of the Midsouth in a Marginal Risk for Severe thunderstorms Tuesday. As midlevel impulses round the base of the Trough and Track Northwest, numerous rounds of showers and thunderstorms are expected to traverse the Midsouth during the upcoming work week. Significant rainfall totals are possible, but the exact placement of the highest totals has changed quite a bit since yesterday and may change again. Current thinking from WPC is that the corridor of highest accumulation has shifted to the Northwest of the Midsouth, with generally 1-3 inches over our area, highest in Northeast Arkansas and lowest in Northeast Mississippi. However, like the location of maximum rainfall these totals may change significantly and I suspect 1-3 inches is a very conservative estimate from WPC. As a result we will keep advertising the threat of flooding in the Hazardous Weather Outlook. High temperatures will be mostly in the 80s Monday through Friday with lows in the low to middle 70s. After the longwave trough axis and associated cold front shifts East of the Midsouth, probably Friday, cooler and drier conditions are expected. Its beyond our current forecast period but guidance is in pretty good agreement that a reinforcing cold front will move through the Midsouth early next week. 30 && .AVIATION... /18z TAFs/ Isolated showers have developed this afternoon and are moving towards the forecast area. The best chance of thunderstorms will be at TUP and MKL late this afternoon. Rain may hang around after sundown as another upper level disturbance moves in from the west. By morning, widespread showers will push through northern Mississippi and could possibly persist through the end of the TAF period. Winds will mainly be souther bu the end of the period. SGW && .MEG WATCHES/WARNINGS/ADVISORIES... AR...None. MO...None. MS...None. TN...None. &&
Hazardous Weather Outlook National Weather Service Memphis TN 258 PM CDT Sun Aug 30 2020 ARZ009-018-026>028-035-036-048-049-058-MOZ113-115-MSZ001>017- 020>024-TNZ001>004-019>022-048>055-088>092-312200- 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- 258 PM CDT Sun Aug 30 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 Severe thunderstorms will be possible across the Mid South. Primary risks include damaging winds. Heavy rain will also be possible. A Slight Risk of Excessive Rainfall exists across a large portion of the Mid South today. .DAYS TWO THROUGH SEVEN...Monday through Saturday There is a Marginal Risk for severe thunderstorms over most of the Midsouth on Monday. Multiple rounds of heavy and rain and thunderstorms are expected during the upcoming work week. Flooding may become a threat. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEMPHIS TN
1223 PM CDT SUN AUG 30 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0350 AM FLASH FLOOD MASON 35.41N 89.53W
08/30/2020 TIPTON TN EMERGENCY MNGR
FLOODING OCCURRED NEAR INTERSECTION OF MAIN ST. AND L
AND N ROAD. HOMES WERE EVACUATED.
&&
CJCThe Columbus AFB radar (KGWX), 76 km away, was scanning. The volume nearest the first event began at 20:00 UTC.
1 flash flood. Local standard time, as filed.
Flooding reported along County Roads 5011 and 5111. Ditches overflowed and contributed to the flooding. CR 5111 was almost impassable.
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, August 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: 918794.