A weak disturbance in the upper levels produced a few strong storms and one marginally severe storm across portions of north Mississippi during the morning hours of June 22nd.
Every event with a place to put it. Tap one for its entry below.
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.
A weak disturbance in the upper levels produced a few strong storms and one marginally severe storm across portions of north Mississippi during the morning hours of June 22nd.
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 Jun 22, 5:00 AM CST, 2 hours 50 minutes earlier.
Area Forecast Discussion National Weather Service Memphis TN 600 AM CDT Fri Jun 22 2018 .DISCUSSION... /issued 453 AM CDT Fri Jun 22 2018/ An unusually deep upper low for late June was evident on GOES East water vapor imagery near St. Louis. This feature will lift east into central Indiana by early evening. Latest short range convection-allowing models depict additional thunderstorms developing later this morning over north MS, with return flow and surface heating destabilizing the boundary layer that was modified by storms late Thursday evening. Storms will remain more limited over the remainder of the Midsouth, given weak instability and shallow lapse rates north of the midlevel dry slot. Fast zonal flow aloft will prevail behind the departed upper low tonight. Storms will likely form over the southern high plains this afternoon, eventually forming an MCS that will track from OK into AR overnight. The MCS will likely weaken by the time it reaches eastern AR toward sunrise Saturday, as it encounters a diurnally- weakening low level jet. Additional storms will be possible over the Midsouth later in the day Saturday, rooted in the boundary layer and perhaps focused along old outflow boundaries. Upper level heights gradually build through the day on Sunday, portending upper ridge amplification on Monday. There will one last shot of nocturnal storms over northwest TN Sunday night, before the upper ridge builds firmly in on Monday and Tuesday. Rain chances under the upper ridge will not completely disappear, as afternoon heat and humidity provide the opportunity to break the convective capping layer aloft. Most areas away from the TN River valley will see rain chances less than 15 percent, below mentionable levels in most cases. Where storms do manage to form, weak shear should limit organization and persistence beyond the afternoon hours. The aforementioned heat and humidity will likely drive heat indices near advisory levels over the MS River delta by Tuesday. Rain chances may edge up a bit by midweek, as the upper ridge axis lifts east and an upper trof axis moves into the middle MS River valley. PWB && .AVIATION... 12Z TAF Set LIFR CIGS are skirting KTUP this morning. CIGS should gradually lift as a new round of convection that has developed along an old outflow boundary across Southern Arkansas will push east towards KTUP by 14-15Z. Expect scattered convection to be near KTUP for the remainder of the day. Thus have a mention VCTS wording between 14-01Z. Elsewhere, can't rule out an isolated SHRA/TSRA from popping up, but not enough to mention in the TAFS. VFR conditions are expected. SW winds will increase to around 11-12 KTS with higher gusts through 01Z. Speeds will diminish during the overnight hours. Another round of convection may be pushing into Eastern Arkansas between 9-15Z Saturday based on several of the CAM models. For now have left mention of vicinity wording out of TAFS until there is some better timing agreement. KRM && && .MEG WATCHES/WARNINGS/ADVISORIES... AR...None. MO...None. MS...None. TN...None. &&
Hazardous Weather Outlook...UPDATED National Weather Service Memphis TN 324 AM CDT Fri Jun 22 2018 ARZ008-009-017-018-026>028-035-036-048-049-058-MOZ113-115- MSZ001>017-020>024-TNZ001>004-019>022-048>055-088>092-231030- 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-Lawrence- Lee AR-Lee MS-Madison-Marshall-McNairy-Mississippi-Monroe-Obion- Panola-Pemiscot-Phillips-Poinsett-Pontotoc-Prentiss-Quitman- Randolph-Shelby-St. Francis-Tallahatchie-Tate-Tippah-Tipton- Tishomingo-Tunica-Union-Weakley-Yalobusha- 324 AM CDT Fri Jun 22 2018 This hazardous weather outlook is for portions of East Arkansas... the Missouri Bootheel...North Mississippi...and West Tennessee. .DAY ONE...Today and Tonight There is a Slight Risk of severe thunderstorms south of a Clarksdale to Oxford to Corinth Mississippi line through this afternoon. There is a Marginal Risk of severe thunderstorms to north of the Slight Risk area, along and south of Interstate 40. Damaging winds and locally heavy rainfall will be possible. .DAYS TWO THROUGH SEVEN...Saturday through Thursday There is a Marginal Risk of severe thunderstorms over most of the Midsouth on Saturday. Damaging winds and locally heavy rainfall will be possible. Heat indices will likely exceed 100 degrees next week and may exceed 105 degrees over the Mississippi River delta. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed over north Mississippi through this afternoon. PWB
The Memphis radar (KNQA), 148 km away, was scanning. The volume nearest the first event began at 13:51 UTC.
2 thunderstorm wind. Local standard time, as filed.
Tree limbs down near the Vance community.
Trees down in Hatley and along Highway 278.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Mississippi in 2018Every state in 2018This day in weather historyWarnings in Mississippi, June 2018
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: 768000, 768010.