In a hot and humid summertime air mass, scattered thunderstorms developed by the afternoon hours on the 12th and 13th. Several severe thunderstorms produced wind gusts which blew down trees and damaged property.
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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.
In a hot and humid summertime air mass, scattered thunderstorms developed by the afternoon hours on the 12th and 13th. Several severe thunderstorms produced wind gusts which blew down trees and damaged property.
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 Jun 12, 11:35 AM CST, 1 hour 55 minutes earlier.
Area Forecast Discussion...UPDATED National Weather Service Jackson MS 1235 PM CDT Tue Jun 12 2018 .UPDATE... Updated for 18Z aviation discussion. Scattered showers and some embedded storms was noted around central Mississippi near interstate 20. Expect the showers and storms to increase incoverage from the mid afternoon to early evening hours. Expect the showers to decrease in coverage overnight. Winds will be light,except near storms. Each of the storms could bring brief bouts of IFR/MVFR conditions with brief locally heavy rainfall. Could see some light patchy fog in areas affected by rainfall early Wednesday before lifting by 14z./17/ && .AVIATION... 18Z TAF discussion: VFR conditions was observed across the Areal Flight Space of the ArkLaMiss. && .DISCUSSION... Latest satellite imagery showed the region under the influence of a mid to upper level ridge with an MCS spinning around Eastern OK. Latest CAM guidance shows that we could get an MCS associated with an MCV coming across our northern counties late this afternoon into this evening. This may bring some isolated severe storms with gusty winds. SPC has a marginal risk across the northern areas. So have added this area to the HWO for that time period. Also made adjustments to pops leading to the the late afternoon pops, since cam guidance shows slow development during the day with morning midlevel clouds around. Otherwise current forecasted highs from the mid 80s to the lower 90s looks to be on track./17/ Prior discussion below: Today and Tonight: The forecast area will remain stuck in the midst of weak troughing aloft to our east, and strong high pressure aloft centered to our west over New Mexico. This will result in continued weak northerly flow aloft across the Lower Mississippi River Valley. Meanwhile at the surface, high pressure wedged in from the east, will maintain southerly flow across the region. Overall, this will continue to equate to warm and increasingly humid conditions as highs range from the upper 80s to lower 90s with dew points around 70. Chances for scattered showers and storms will exist mainly during the afternoon hours. However, with this warm and unstable airmass, convection could begin bubbling up as early as by late this morning, and continue into early this evening before dissipating. If the outflow or MCV associated with the complex of storms dropping south across Southeast Kansas and West Central Missouri make it into the CWA, it could further aid in the develop of convection across the region later today. A storm or two could be on the strong side, with an isolated storm possibly reaching severe limits. Gusty winds will be the primary concern with such storms. Frequent lightning and heavy downpours are expected. Scattered convection is again expected to begin dissipating after sunset when heating is lost. Small rain chances will linger through the overnight hours. Skies will remain partly to mostly cloudy tonight, as lows range from the upper 60s to middle 70s. /19/ Wednesday through next Monday: Expect a summertime-like pattern with warm, muggy conditions & active period of diurnal showers & storms through the work week & into the weekend. As our region remains on the eastern periphery of the mid-level ridge to our west over Texas, which will keep mostly west-northwest flow locked in through at least the later portions of the week. In addition, the strongest mid-high level jet energy & cold front will be diving through the mid-Atlantic & down through the Appalachians & low-mid Mississippi Valley by mid-late week. This will combine with high PW air (1.75-2 inches) & bring an increase coverage of convection, especially by the start of the forecast period on Wednesday. The NAM & NMM seems to show some idea of some potential for a convective complex to move east-southeast, which would be favorable due to some decent northerly low-level shear vectors (0-2km & 0-3km) around 10-15kts, vertical totals around 25-26 degrees C & some favorable microburst parameters. This could potentially be a favorable microburst environment capable of some isolated strong-severe storms, especially if any organized convection can line up with the vectors. However, with high PWs lingering across the area through most of the work week, light effective bulk shear & widespread convection & clouds, going to still defer to assess each day's microburst potential each & every day. Due to that, not going to hit this in the HWO/graphics but will have to keep an eye on it. Expect warm & humid conditions to linger through the week with mid- level ridge building to our north & weak mid-level & possibly surface low feature over the south-southwestern Gulf by late week & into the weekend. This building mid-level ridge will only slightly shunt convective coverage late in the week further south while heat indices will climb, possibly briefly peaking into the lower 100s or near 105 degrees by the weekend. Global models continue to slowly trend that mid-level & weak tropical wave/surface disturbance slightly east towards the northwest Gulf Coast. Due to that, expect some potential for some higher PW air & heavier showers & storms possible, especially west of the I-55 corridor, by late weekend (i.e. ~Sunday). For now, main concerns look to be increase in some heat stress, especially in the north, & potential for some heavier rains & storms possibly in the west-southwest by late weekend. /DC/ && .PRELIMINARY POINT TEMPS/POPS... Jackson 90 70 89 71 / 39 26 39 25 Meridian 87 70 90 71 / 53 31 54 30 Vicksburg 91 72 90 72 / 21 21 31 25 Hattiesburg 89 69 90 70 / 51 23 58 31 Natchez 91 71 90 71 / 28 18 33 21 Greenville 91 74 91 73 / 36 24 36 29 Greenwood 89 72 89 72 / 47 28 46 29 && .JAN WATCHES/WARNINGS/ADVISORIES... MS...None. LA...None. AR...None. && 17
Hazardous Weather Outlook National Weather Service Jackson MS 207 PM CDT Tue Jun 12 2018 ARZ074-075-LAZ007>009-015-016-023-MSZ018-019-025>048-050-131915- Ashley-Chicot-Morehouse-West Carroll-East Carroll-Richland- Madison LA-Franklin LA-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-Scott- 207 PM CDT Tue Jun 12 2018 This hazardous weather outlook is for portions of southeast Arkansas, northeast Louisiana, central Mississippi, and north central Mississippi. .DAY ONE...Tonight and Wednesday SEVERE THUNDERSTORMS THREAT...Marginal TIMING...Tonight Isolated severe thunderstorms with damaging winds and hail to the size of quarters are possible late this afternoon and early evening. (https://www.weather.gov/images/jan/graphicast/1.png) .DAYS TWO THROUGH SEVEN...Wednesday night through Monday 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 may be needed for portions of the region tonight. LAZ024>026-MSZ049-051>066-072>074-131915- Catahoula-Tensas-Concordia-Rankin-Newton-Lauderdale-Claiborne- Copiah-Simpson-Smith-Jasper-Clarke-Jefferson-Adams-Franklin MS- Lincoln-Lawrence-Jefferson Davis-Covington-Jones-Marion-Lamar- Forrest- 207 PM CDT Tue Jun 12 2018 This hazardous weather outlook is for portions of northeast Louisiana, central Mississippi, east central Mississippi, and south central Mississippi. .DAY ONE...Tonight and Wednesday The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Wednesday night through Monday 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 Monday. 21 && ...HAZARD LEGEND... *SEVERE THUNDERSTORMS* High...Significant severe thunderstorms are expected. Moderate...Severe storms expected with significant severe weather possible. Enhanced...Severe storms expected. Slight...Severe storms possible. Marginal...Isolated severe storms possible. ...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/jan/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 ...ADDITIONAL URLS FOR SEVERE WEATHER ISSUES... Storm Prediction Center (SPC)... www.spc.noaa.gov/ Meso Analysis... www.spc.noaa.gov/exper/mesoanalysis/ Day 1 through 3 Outlooks... www.spc.noaa.gov/products/outlook/ Storm Reports... www.spc.noaa.gov/climo/online/
The Columbus AFB radar (KGWX), 38 km away, was scanning. The volume nearest the first event began at 19:27 UTC.
4 thunderstorm wind, 1 hail. Local standard time, as filed.
A few trees were blown down around the Steens community.
A few trees and large tree limbs were blown down near the areas of Beauregard Road, Sand Hill Road, and Monticello Road east of Wesson.
Hail up to the size of quarters fell along Divide Road.
Two trees were blown down in Enterprise. One fell onto a car on Old Mill Creek Road, and the other fell along MS Highway 513 on the south side of town.
Downburst winds blew down several large tree limbs at a residence in Hollandale.
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: 765324, 765333, 765340, 765346, 765349.