EF1 tornado in Union Parish, Louisiana
Tornado April 14, 2018 · Union Parish, Louisiana
NOAA records this tornado county by county. Its path ran through Lincoln Parish → Ouachita Parish → Union Parish; the totals above are for the whole tornado.
The path drawn at its surveyed width of 1,100 yards (0.62 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.
What the National Weather Service wrote
The is a continuation of the Ouachita Parish EF-1 tornado. This EF-1 tornado, with estimated maximum winds between 95-105 mph, crossed Reggie Skains Road snapping several trees, and continued east across extreme Southern Union Parish just north of the Ouachita Parish line. The tornado crossed Highway 15 near the same location another EF-1 tornado that initially touched down just north of Calhoun tracked north from Ouachita Parish earlier that evening on April 13th. This tornado continued east along Highway 552 before lifting at the intersection of Highway 552 and Callaway Road. Most of the damage consisted of snapped and uprooted trees across extreme Southern Union Parish. One very large pecan tree estimated at 100 years old was lifted and dropped onto a home.
The wider storm
A strong upper level trough of low pressure progressed east across the Southern Plains during the afternoon of April 13th, with a large warm sector of warm/humid air having expanded north across much of the Ark-La-Tex. A capping inversion delayed the onset of thunderstorm development until the late afternoon, where it eroded and large scale forcing increased with shortwave perturbations ahead of the trough and along/just ahead of a dry line as it mixed east to the Interstate 35 corridor or North and Central Texas. Given the moderate instability and strong wind shear that developed with the lead shortwave, scattered supercell thunderstorms developed across Northcentral Louisiana during the late afternoon through mid evening hours, producing numerous reports of damaging winds, and several tornadoes/funnel cloud reports. While a lull in the storms was observed, a line of severe thunderstorms developed along the dryline south of the Dallas/Fort Worth Metroplex, and progressed east into East Texas by late evening, and across North Louisiana after midnight on April 14th. Damaging winds and reports of hail were prevalent at first with this line of severe thunderstorms, but a number of notches developed along the squall line as these storms crossed into North Louisiana, resulting in several tornadoes touching down across areas along and north of the Interstate 20 corridor from Shreveport to Monroe. Of particular interest, the initial string of tornadoes first touched down just west of the Texas/Louisiana state line along the Harrison/Panola County line, with this supercell producing two separate tornadoes as it entered Shreveport. In fact, the tornado remained on the ground across much of western and central Shreveport, moving across the northern fringes of the property at the National Weather Service Office before moving across the Queensborough and Allendale neighborhoods and across Downtown Shreveport, before tracking across much of Bossier City along and just north of Interstate 20, crossing Interstate 220, and across the Red Chute and Princeton communities before lifting just west of the Bossier/Webster Parish line. These severe thunderstorms exited North Louisiana just after 3 am on the 14th.
Began near Downsville (32.5825, -92.3706).
Other tornadoes from the same storm system
12 more tornadoes the National Weather Service filed under this storm episode.
Source: NOAA Storm Events Database, event 744167. Narratives are written by the National Weather Service forecast office that issued the report.
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