A storm system developed several rounds of strong to severe thunderstorms across portions of Mississippi on June 22. These storms produced wind which damaged structures and blew down trees.
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 JAN wrote it up.
A storm system developed several rounds of strong to severe thunderstorms across portions of Mississippi on June 22. These storms produced wind which damaged structures and blew down trees.
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 21, 11:22 PM CST, 48 minutes earlier.
Area Forecast Discussion...UPDATED National Weather Service Jackson MS 1222 AM CDT Fri Jun 22 2018 ...SEVERE THUNDERSTORMS POSSIBLE LATER TONIGHT THROUGH AT LEAST FRIDAY NIGHT ACROSS PORTIONS OF THE REGION... .UPDATE... Updated for 06Z aviation discussion && .AVIATION... 06Z TAF discussion: IFR cigs were observed at MEI at 05Z with VFR conds observed elsewhere. Satellite imagery suggests IFR cigs wl be psbl over east MS the remainder of the night. Radars had a line of TSRA north of HWY 82 that wl drift south through the night affecting GTR by 0630Z and GLH-GWO after 07Z. The remainder of the TAF sites wl see TSRA activity Friday. Away from TSRA activity VFR conds are expected areawide after 14Z. /22/ && .DISCUSSION... Scattered thunderstorms have slowly dropped south out of TN into northern MS the last few hours and the HRRR shows this southward sag continuing after midnight. While instability has waned with the loss of heating, a slug of rich theta-e air in the lower levels continues to feed the convection from the southwest. This along with 40-45 knots of bulk shear are still maintaining a few decent updrafts. The HRRR and latest NAM are showing the convective area continuing to wane after midnight and now only skimming the far northern portions of the forecast area. Have, thus, pushed the marginal severe area farther to the north and decreased pops to the south of there./26/ Prior discussion below: Through Friday: Lead low level trough in advance of main height falls in association with southern fringe of incoming big upper disturbance is now shifting to our southeast. Most of the concentrated heavy rainfall and storms will shift to the southeast of the Pine Belt concurrently, although isolated to scattered thunderstorms will remain possible over the remainder of the forecast area through early evening. The previous MARGINAL risk of severe storms through the afternoon has been removed as the probability of convection deep and vigorous enough to take advantage of increasing environmental shear is not very good until tonight. Temperatures have been kept down a bit in most areas by the clouds and rain, but some upper 80s to low 90s readings creeping back toward the MS River is juxtaposed with dewpoints running in the mid to upper 70s, which of course is delivering some unpleasant heat index values near to a little above the century mark. This pocket of oppressive conditions will be increasingly on our door step (and sometimes smashing through the door) over the course of the next handful of days. As I write this there are potent storms headed through the Midsouth where enough atmospheric lift has materialized to spur deep convection in an environment of 2000+ MLCAPE and deep layer shear approaching 40 kts. The cold front triggering the storms is headed through central AR, but likely will not get a lot farther before stalling just to our northwest and north through tomorrow. As this happens the environment capable of generating the current severe storms heading toward Memphis will shift equator-ward (more into our region) as the driving upper disturbance pushes east/southeast and increases lift and shear over our region. We will likely start to experience the tangible impact of this across far northern zones tonight as potentially potent convective clusters forming upstream push east/southeast and bring at least an isolated damaging wind risk to the Highway 82 corridor. Worthy of mentioning that low level shear will be marginally supportive of a stray spin-up tornado late tonight through tomorrow with any organized thunderstorm clusters in our region. The latter is definitely not the main risk, but it is something to keep in mind. The larger risks will be hail and especially damaging wind gusts. The overall threat for severe storms will increase tomorrow. Current expected scenario is that a combination of thunderstorm outflow pressing south and the stalled boundary to our northwest/north will trigger thunderstorms which will probably quickly grow upscale into one or two potent thunderstorm clusters that race east/southeast through at least the northern half of the region through the day. There is uncertainty with how far south this activity may get; at this point we cannot rule out that thunderstorms and the attendant gusty wind threat gets all the way to the southern fringes of the forecast area. Working CAPE values tomorrow pushing 3000 j/kg in concert with deep layer wind shear approaching 40 kts is a rather rare combination in our region for the 2nd day of summer. Everyone should remain weather aware through tomorrow and understand some of the thunderstorm activity may be far from the typical summer-time rumbles. /BB/ Friday night through Thursday: The forecast period will start off Friday night with a closed mid/upper-level low over the Ohio River Valley and an associated shortwave trough axis extending through the southeast states. Zonal to northwest flow will be in place across the ArkLaMiss ahead of a subtle shortwave trough and speed max ejecting out of the Rockies and into the Southern Plains. This feature will help to kick off a complex of thunderstorms over Oklahoma Friday night along a stalled frontal boundary that will be draped from west to east into northern Mississippi. This thunderstorm complex is progged to track along the frontal boundary and into northern portions of the area along the Hwy 82 corridor Saturday morning into the early afternoon hours. The environment will be supportive of isolated strong to severe thunderstorms with 20-30kts of deep layer shear, ample instability, and respectable lapse rates. While a marginal risk for severe weather may eventually be needed, the placement will be highly dependent on the convective evolution both today and tomorrow and the placement of any residual outflow boundaries. Therefore, will hold off on mention in the HWO/graphics for now but the potential will bear watching. For the remainder of the weekend and into early next week, the main headline will shift from thunderstorms to heat stress as mid-level ridging builds north into the area keeping the better flow and shortwave troughs displaced north over the Middle Mississippi River Valley. High temperatures will gradually climb into the low to mid 90s Saturday through Tuesday with low to mid 70s dewpoints supporting heat index values in the 100-105 degree range across much of the area. This heat will be confined further south on Saturday before spreading north by Sunday into Monday and Tuesday. Will continue to advertise the ongoing limited risk in the HWO/graphics for heat stress and a day or two of heat advisories cannot be completely ruled out. By mid to late next week, global model solutions begin to diverge, however there is general agreement that the center of the mid-level ridge will become further removed to the north of the ArkLaMiss region with easterly flow helping to support isolated to scattered diurnally driven thunderstorm chances by Wednesday. There are also indications that a weak inverted trough could retrograde beneath the ridge across the northern Gulf of Mexico late next week which would further reinforce increasing thunderstorm chances, especially across southern portions of the area. While temperatures will still be in the low 90s, the potential for storms and clouds to cut back on heating leads to lower confidence on heat stress continuing further into the week, although this will need to be evaluated on a daily basis. /TW/ && .PRELIMINARY POINT TEMPS/POPS... Jackson 74 93 74 93 / 18 11 1 10 Meridian 74 93 75 94 / 28 12 1 10 Vicksburg 75 92 74 93 / 18 6 2 11 Hattiesburg 75 94 74 95 / 10 4 2 12 Natchez 75 91 75 92 / 8 3 2 11 Greenville 74 91 75 92 / 33 28 3 7 Greenwood 74 91 74 91 / 30 34 4 8 && .JAN WATCHES/WARNINGS/ADVISORIES... MS...None. LA...None. AR...None. && 22/BB/TW
Hazardous Weather Outlook...UPDATED National Weather Service Jackson MS 845 PM CDT Thu Jun 21 2018 ARZ074-075-LAZ007>009-015-016-MSZ018-019-025-027-034>052-230145- Ashley-Chicot-Morehouse-West Carroll-East Carroll-Richland- Madison LA-Bolivar-Sunflower-Leflore-Carroll-Washington-Humphreys- Holmes-Attala-Winston-Noxubee-Issaquena-Sharkey-Yazoo-Madison MS- Leake-Neshoba-Kemper-Warren-Hinds-Rankin-Scott-Newton-Lauderdale- 845 PM CDT Thu Jun 21 2018 This hazardous weather outlook is for portions of southeast Arkansas, northeast Louisiana, central Mississippi, north central Mississippi, and northwest Mississippi. .DAY ONE...Tonight and Friday SEVERE THUNDERSTORMS THREAT...Slight TIMING...Friday FLOODING THREAT...Limited TIMING...Friday Severe thunderstorms capable of producing damaging wind gusts and hail up to quarter size are possible Friday. An isolated tornado cannot be ruled out as well. Thunderstorms could produce rainfall ranging from 1 to 3 inches in a short amount of time and flash flooding will be possible. (https://www.weather.gov/images/jan/graphicast/2.png) .DAYS TWO THROUGH SEVEN...Friday night through Wednesday Isolated severe thunderstorms with damaging winds and hail up to quarter size are possible for locations along and north of Interstate 20 Friday night. Maximum heat index values approaching 105 degrees are possible on Saturday into early next week. This may result in elevated heat stress levels. (https://www.weather.gov/images/jan/graphicast/3.png) .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 Friday through Friday night. MSZ026-028>033-230145- Grenada-Montgomery-Webster-Clay-Lowndes-Choctaw-Oktibbeha- 845 PM CDT Thu Jun 21 2018 This hazardous weather outlook is for portions of central Mississippi, north central Mississippi, and northeast Mississippi. .DAY ONE...Tonight and Friday SEVERE THUNDERSTORMS THREAT...Marginal TIMING...Tonight SEVERE THUNDERSTORMS THREAT...Slight TIMING...Friday FLOODING THREAT...Limited TIMING...Friday Isolated severe thunderstorms capable of producing damaging wind gusts and hail up to quarter size are possible tonight. An isolated tornado cannot be ruled out as well. (https://www.weather.gov/images/jan/graphicast/1.png) Severe thunderstorms capable of producing damaging wind gusts and hail up to quarter size are possible Friday. An isolated tornado cannot be ruled out as well. Thunderstorms could produce rainfall ranging from 1 to 3 inches in a short amount of time and flash flooding will be possible. (https://www.weather.gov/images/jan/graphicast/2.png) .DAYS TWO THROUGH SEVEN...Friday night through Wednesday Isolated severe thunderstorms with damaging winds and hail up to quarter size are possible for locations along and north of Interstate 20 on Friday night. Maximum heat index values approaching 105 degrees are possible on Saturday into early next week. This may result in elevated heat stress levels. (https://www.weather.gov/images/jan/graphicast/3.png) .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 through Friday night. LAZ023>026-MSZ053>066-072-230145- Franklin LA-Catahoula-Tensas-Concordia-Claiborne-Copiah-Simpson- Smith-Jasper-Clarke-Jefferson-Adams-Franklin MS-Lincoln-Lawrence- Jefferson Davis-Covington-Jones-Marion- 845 PM CDT Thu Jun 21 2018 This hazardous weather outlook is for portions of northeast Louisiana, central Mississippi, east central Mississippi, and south central Mississippi. .DAY ONE...Tonight and Friday SEVERE THUNDERSTORMS THREAT...Marginal TIMING...Friday Isolated severe thunderstorms capable of producing damaging wind gusts and hail up to quarter size are possible Friday. (https://www.weather.gov/images/jan/graphicast/2.png) .DAYS TWO THROUGH SEVEN...Friday night through Wednesday Maximum heat index values approaching 105 degrees are possible on Saturday into early next week. This may result in elevated heat stress levels. (https://www.weather.gov/images/jan/graphicast/3.png) .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 Friday. MSZ073-074-230145- Lamar-Forrest- 845 PM CDT Thu Jun 21 2018 This hazardous weather outlook is for portions of southeast Mississippi. .DAY ONE...Tonight and Friday The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Friday night through Wednesday Maximum heat index values approaching 105 degrees are possible on Saturday into early next week. This may result in elevated heat stress levels. (https://www.weather.gov/images/jan/graphicast/3.png) .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 Wednesday. 26 && ...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. *FLOODING* Extreme...Confident in significant flooding. Significant...Significant flooding possible. Elevated...Confident in flooding. Limited...Flooding 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/ ...ADDITIONAL URLS FOR FLOODING ISSUES... Current Watches and Warnings... https://www.weather.gov/jan/safe_HeavyRain Observed Precipitation Images... https://www.weather.gov/jan/precipmaps River Forecast Center... https://www.weather.gov/lmrfc/ Significant River Flood Outlook... www.wpc.ncep.noaa.gov/nationalfloodoutlook/index.html Day 1 through 3 Excessive Rainfall... www.wpc.ncep.noaa.gov/qpf/excess_rain.shtml Excessive Rainfall Discussion... www.wpc.ncep.noaa.gov/discussions/qpferd.html Day 1 through 7 QPF... www.wpc.ncep.noaa.gov/qpf/qpf2.shtml QPF Discussion... www.wpc.ncep.noaa.gov/discussions/qpfpfd.html
The Columbus AFB radar (KGWX), 138 km away, was scanning. The volume nearest the first event began at 06:12 UTC.
8 thunderstorm wind. Local standard time, as filed.
A line of severe thunderstorms produced damaging wind gusts across Grenada. A total of six houses were damaged from fallen trees. Three of the houses had significant damage. A tree which fell on a house on Pecan Street injured one person.
Downburst winds damaged chicken coops and a storage building along Hebron Road.
A tree was blown down onto a power line southwest of Mayersville.
A tree was blown down onto a power line which then caught on fire.
Several trees were blown down across roads around the Rose Hill area.
A gas station sign was blown down onto an automobile.
A tree was blown down across County Road 280 just east of US Highway 11.
A large tree was blown down onto County Road 690 east of MS Highway 145.
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: 765372, 766315, 766358, 766366, 766415, 766406, 766426, 766432.