A weak cold front moved across central and southern Mississippi and helped initiate a few thunderstorms by the afternoon of August 2nd. These storms moved over the same locations and produced some flash flooding.
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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 JAN wrote it up.
A weak cold front moved across central and southern Mississippi and helped initiate a few thunderstorms by the afternoon of August 2nd. These storms moved over the same locations and produced some flash flooding.
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 Jackson, MS wrote its last area forecast discussion before the first event at Aug 1, 5:57 PM CST, 2 hours 3 minutes earlier.
Area Forecast Discussion...UPDATED National Weather Service Jackson MS 657 PM CDT Sat Aug 1 2020 .UPDATE... Updated for 00Z aviation discussion && .AVIATION... 00Z TAF discussion: A few showers or very isolated storm may impact TAF sites near JAN/HKS over the next hour or so. However, not very confident to introduce in the TAF. Same for MEI, PIB & HBG but those chances are quickly dwindling. Otherwise, expect VFR conditions through the night, other than a brief MVFR flight category drop (i.e. ceiling &/or visibility) prior to daybreak, mainly at PIB & HBG. However, drier air will limit that potential at most sites. Any lower flight categories should mix out just after daybreak around 02/13Z, with some scattered cumulus development around 02/15-17. Some showers & isolated storms are possible tomorrow again by mid- afternoon around 02/19-20Z at JAN, HKS, MEI, PIB & HBG & should dissipate by early evening before 03/00Z. /DC/ && .DISCUSSION... Tonight and tomorrow... A cold front remains draped across portions of central Mississippi and northeast Louisiana this afternoon. Behind the front, drier air has already begun to filter into the region. Dewpoints are in the lower 70s and upper 60s at locations across Arkansas and northern Mississippi. In addition, much more pleasant temperatures are occurring this afternoon with readings in the mid 70s to lower 80s. Sounds like a pretty perfect start to August for those locations. Farther south, along and south of the front, temperatures have reached the mid to upper 80s and dewpoints remains in the lower to mid 70s. While convection has been slow to develop today, it is in these locations along and south of the front, where some showers and storms could occur this afternoon into this evening. Coverage and severity won't be anything like was the case yesterday, but I can't rule out perhaps a strong storm given enough deep layer shear and sufficient instability. Any convection that develops should diminish this evening, resulting in a quiet night across the region. The aforementioned front won't be moving much given the upper level pattern features a rather anomalous upper trough for this time of year. Drier air will continue to filter south into more of the forecast area, with dewpoints expected to be in the mid to upper 60s. Temperatures tomorrow will be in the upper 80s to lower 90s. Additional showers and/or storms will again occur tomorrow, along and south of where the frontal boundary resides, but coverage should not be too great nor should there be concern for severe storms. All in all, not too bad for the beginning of August in the Deep South!! /28/ Tomorrow night through Saturday... The forecast period starts off tomorrow night with stout upper ridging centered across the Desert Southwest and an anomalous longwave trough axis extending down the Mississippi River Valley. At the surface, a cold frontal boundary will be stalled along the Gulf Coast and is progged to remain to our south through the majority of the long term forecast period. As a result, a prolonged dry northwest flow regime is progged to remain in place across the region through much of the forecast period. PWATs will fall to near 1", which is in the 10th percentile for early August. As such, very little to no rainfall is expected with slight chance PoPs confined to far southern portions of the area closer to the stalled front along the coast. Cooler 850mb temperatures aloft will support afternoon highs in the upper 80s to low 90s through the middle of next work week before upper ridging flattens out and encroaches on the Lower Mississippi Valley later in the week. This will support afternoon highs climbing back into the mid 90s as 850mb temperatures warm again. Overnight lows will be below average, especially Monday through Thursday mornings. Conditions will be ideal for efficient radiational cooling with clear skies, calm winds, and drier air with dewpoints falling into the low 60s. This will support low temperatures in the low to mid 60s, which will be several degrees below average for early August. /TW/ && .PRELIMINARY POINT TEMPS/POPS... Jackson 71 90 70 92 / 16 29 0 9 Meridian 72 89 69 93 / 19 36 0 8 Vicksburg 72 90 69 94 / 7 12 0 5 Hattiesburg 72 90 72 93 / 24 50 0 8 Natchez 72 89 70 92 / 16 24 0 6 Greenville 68 89 69 91 / 2 4 3 7 Greenwood 68 89 68 91 / 2 8 2 9 && .JAN WATCHES/WARNINGS/ADVISORIES... MS...None. LA...None. AR...None. && DC
Hazardous Weather Outlook National Weather Service Jackson MS 131 PM CDT Sat Aug 1 2020 ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074- 021845- Ashley-Chicot-Morehouse-West Carroll-East Carroll-Richland- Madison LA-Franklin LA-Catahoula-Tensas-Concordia-Bolivar- Sunflower-Leflore-Grenada-Carroll-Montgomery-Webster-Clay-Lowndes- Choctaw-Oktibbeha-Washington-Humphreys-Holmes-Attala-Winston- Noxubee-Issaquena-Sharkey-Yazoo-Madison MS-Leake-Neshoba-Kemper- Warren-Hinds-Rankin-Scott-Newton-Lauderdale-Claiborne-Copiah- Simpson-Smith-Jasper-Clarke-Jefferson-Adams-Franklin MS-Lincoln- Lawrence-Jefferson Davis-Covington-Jones-Marion-Lamar-Forrest- 131 PM CDT Sat Aug 1 2020 This hazardous weather outlook is for portions of southeast Arkansas, northeast Louisiana, central Mississippi, north central Mississippi, and south central Mississippi. .DAY ONE...Tonight and Sunday The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Sunday night through Friday The probability for widespread hazardous weather is low. .SPOTTER CALL TO ACTION STATEMENT... The activation of storm spotters, HAM radio operators, and emergency management personnel in support of severe weather operations is not expected through next Friday. 28 && ...HAZARD LEGEND... No short term hazards expected. ...USEFUL WEATHER WEB PAGES (URLS)... NWS JAN Home page... https://www.weather.gov/jan Stay Aware, Stay Safe NWS JAN Briefing Page... https://www.weather.gov/jan/safe Latest Weather Briefing... https://www.weather.gov/jan/weather_briefing Tropical page... https://www.weather.gov/srh/tropical?office=jan National Hurricane Center Home Page... https://www.nhc.noaa.gov/ Find NWS JAN on Facebook... https://www.facebook.com/NWSJacksonMS Follow NWS JAN on Twitter... @NWSJacksonMS Follow NWS JAN on Youtube... https://www.youtube.com/user/NWSJacksonMiss
The Jackson/Brandon,MS radar (KDGX), 11 km away, was scanning. The volume nearest the first event began at 02:00 UTC.
2 thunderstorm wind, 1 flash flood, 1 hail. Local standard time, as filed.
Water covered one side of Flowood Drive. Water also covered the road at Magnum Drive and Flowood Drive.
A tree was blown down on I-59 southbound at mile marker 88. Trees were also blown down along Highway 29 north of Ellisville.
A swath of large hail fell across portions of central Jones County from around Ellisville to Myrick. The largest hailstone that fell was larger than golf ball size to the south-southeast of Glade. Hail up to golfball size fell near Ellisville and Myrick.
Several trees were blown down south of Myrick.
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: 898312, 902299, 902301, 902302.