A passing upper level disturbance combined with an unstable airmass to produce an isolated severe storm across portions of southwest Tennessee during the evening hours of June 12th.
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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.
A passing upper level disturbance combined with an unstable airmass to produce an isolated severe storm across portions of southwest Tennessee during the evening hours of June 12th.
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 12, 5:28 PM CST, 2 hours 37 minutes earlier.
Area Forecast Discussion National Weather Service Memphis TN 628 PM CDT Tue Jun 12 2018 .UPDATE... See 00z aviation discussion below. && .PREV DISCUSSION... /issued 303 PM CDT Tue Jun 12 2018/ DISCUSSION... Typical early/midsummer pattern will prevail through the next seven days. A 500mb height ridge center will shift east from NM to TX by Thursday, and to the Ohio River valley by Sunday. Midsouth rain chances will gradually decrease, if not diminish altogether, by Thursday. This pattern will continue through Monday. With 700mb temps near 10C, the atmosphere will remain capped to deep moist convection, except during the heat of day. Where isolated storms manage to form, a few may persist into the early evening. GFS continues to exhibit a nocturnal wet bias under the upper ridge, and expect the nighttime hours to predominately dry. Late week afternoon heat indices will approach 105 degrees over northeast AR, where higher dewpoints pool over the delta. Heat advisories may be needed as we approach late week. Looking out beyond the extended into the middle part of next week... GFS and ECMWF depict a retrograding cut-off upper low over the Great Basin and northwest flow aloft from the northern plains into the Carolinas. Such a pattern would likely bring a cold front (i.e., near-normal temperatures) and increased rain chances to the Midsouth. PWB && .AVIATION... /00z TAFs/ A line of thunderstorms will move south across the region this evening with isolated thunderstorms developing ahead of the line. Very heavy rainfall and localized strong winds will accompany these storms. Expect this convection to weaken around sunset but additional activity is possible overnight. Outflow from this evening's storms may stabilize the area into Wednesday morning, but diurnal showers and thunderstorms are anticipated again tomorrow afternoon. Winds will be relatively light with VFR conditions outside of convection. Johnson && .MEG WATCHES/WARNINGS/ADVISORIES... AR...None. MO...None. MS...None. TN...None. &&
Hazardous Weather Outlook...UPDATED National Weather Service Memphis TN 350 PM CDT Tue Jun 12 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>092-132300- 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- 350 PM CDT Tue Jun 12 2018 This hazardous weather outlook is for portions of East Arkansas... the Missouri Bootheel...North Mississippi...and West Tennessee. .DAY ONE...This Afternoon and Tonight A Marginal Risk for severe storms exists late this afternoon and early evening. Damaging wind and possible large hail will be the main threats from these storms. .DAYS TWO THROUGH SEVEN...Wednesday through Monday A few storms could become strong to severe on Wednesday. Damaging wind and possible large hail will be the main threats from these storms. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated at this time. PWB
Special Weather Statement
National Weather Service Memphis TN
631 PM CDT TUE JUN 12 2018
ARZ028-TNZ019-048-130000-
Mississippi AR-Lauderdale TN-Dyer TN-
631 PM CDT TUE JUN 12 2018
...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED UNTIL 700 PM CDT
FOR...
Northeastern Mississippi County in eastern Arkansas...
North central Lauderdale County in southwestern Tennessee...
Southwestern Dyer County in northwestern Tennessee...
At 631 PM CDT...a strong thunderstorm producing winds at least 40 mph
was located over Gosnell, moving east at 35 mph.
Very heavy rain along with continuous cloud to ground lightning are
also possible with this thunderstorm.
People in northeastern Mississippi...north central Lauderdale and
southwestern Dyer Counties should monitor this storm closely.
LAT...LON 3598 8962 3579 8966 3586 9005 3600 9000
3600 8982
TIME...MOT...LOC 2331Z 288DEG 30KT 3596 8997PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEMPHIS TN
632 PM CDT TUE JUN 12 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0607 PM HAIL 2 NNW HORN LAKE 34.98N 90.05W
06/12/2018 M0.88 INCH DESOTO MS SOCIAL MEDIA
DIME TO NICKEL SIZE HAIL REPORTED ALONG STATE LINE ROAD
BETWEEN HORN LAKE ROAD AND TULANE ROAD.
&&
MJSpecial Weather Statement National Weather Service Memphis TN 721 PM CDT TUE JUN 12 2018 MSZ002-130045- Marshall MS- 721 PM CDT TUE JUN 12 2018 ...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED UNTIL 745 PM CDT FOR... Central Marshall County in northwestern Mississippi... At 721 PM CDT...a strong thunderstorm producing winds at least 40 mph was located near Marianna, or 9 miles west of Holly Springs, moving east at 35 mph. Very heavy rain along with continuous cloud to ground lightning are also possible with this thunderstorm. People in central Marshall County should monitor this storm closely. LAT...LON 3469 8968 3483 8965 3487 8938 3468 8943 TIME...MOT...LOC 0021Z 250DEG 29KT 3477 8961
Special Weather Statement National Weather Service Memphis TN 728 PM CDT TUE JUN 12 2018 MSZ002-003-130045- Marshall MS-Benton MS- 728 PM CDT TUE JUN 12 2018 ...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED UNTIL 745 PM CDT FOR... Northeastern Marshall County in northwestern Mississippi... Northwestern Benton County in northeastern Mississippi... At 728 PM CDT...a strong thunderstorm producing winds at least 40 mph was located near Slayden, or 8 miles north of Holly Springs, moving east at 25 mph. Very heavy rain along with continuous cloud to ground lightning are also possible with this thunderstorm. People in northeastern Marshall and northwestern Benton Counties should monitor this storm closely. LAT...LON 3483 8949 3496 8949 3497 8920 3482 8922 TIME...MOT...LOC 0028Z 270DEG 21KT 3489 8945
Special Weather Statement National Weather Service Memphis TN 751 PM CDT TUE JUN 12 2018 MSZ002>004-130115- Tippah MS-Marshall MS-Benton MS- 751 PM CDT TUE JUN 12 2018 ...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED UNTIL 815 PM CDT FOR... Northwestern Tippah County in northeastern Mississippi... Northeastern Marshall County in northwestern Mississippi... Central Benton County in northeastern Mississippi... At 750 PM CDT...a strong thunderstorm producing winds at least 40 mph was located near Snow Lake Shores, or 7 miles northeast of Holly Springs, moving east at 45 mph. Very heavy rain along with continuous cloud to ground lightning are also possible with this thunderstorm. People in northwestern Tippah...northeastern Marshall and central Benton Counties should monitor this storm closely. LAT...LON 3476 8941 3490 8939 3492 8899 3472 8899 TIME...MOT...LOC 0050Z 270DEG 41KT 3483 8932
Special Weather Statement
National Weather Service Memphis TN
829 PM CDT TUE JUN 12 2018
TNZ088-130200-
Shelby TN-
829 PM CDT TUE JUN 12 2018
...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED UNTIL 900 PM CDT
FOR...
Northeastern Shelby County in southwestern Tennessee...
At 829 PM CDT...a strong thunderstorm producing winds at least 40 mph
was located over Millington, moving east at 15 mph.
Very heavy rain along with continuous cloud to ground lightning are
also possible with this thunderstorm.
People in northeastern Shelby County should monitor this storm
closely.
LAT...LON 3537 9008 3539 9007 3540 9004 3538 8964
3537 8964 3537 8963 3517 8964 3528 9010
TIME...MOT...LOC 0129Z 290DEG 12KT 3531 8985The Memphis radar (KNQA), 21 km away, was scanning. The volume nearest the first event began at 02:04 UTC.
1 thunderstorm wind. Local standard time, as filed.
Large tree down closing Dexter Street near the entrance to Fletcher Creek Park.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Tennessee in 2018Every state in 2018This day in weather historyWarnings in Tennessee, 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: 767124.