Excessive Rainfall Possible for the Gulf Coast and Florida; October Heat Wave in California

A slow moving front will be the focus area for heavy to excessive rainfall and a threat for flash/urban flooding across parts of the Gulf Coast into central/northern Florida early this week. Abnormally hot, potentially record-breaking, temperatures will continue for southern California and stretch north toward the Bay Area and Central Valley this week. Read More >

Overview

Isolated rotating storms developed along a front in south central South Dakota in the afternoon of Sunday, June 30, 2019. These storms produced 1 confirmed tornado near the small town of Lucas in northern Gregory County, as well as up to golf ball size hail. An earlier isolated storm in southwest Minnesota briefly produced up to half dollar size hail. Additional storms moved from south central to east central South Dakota after sunset, producing isolated damaging wind gusts, with damage primarily to trees and power lines.

Tornado near Lucas, SD viewed from the west. Photo courtesy of Jon Sperl.
Tornado near Lucas, SD.
Photo courtesy of Jon Sperl.

Tornado
Radar

Tornadoes

Tornado - near Lucas, SD
Gregory County

Date	June 30, 2019
Time (Local)	424 pm
EF Rating	EF0
Est. Peak Winds	74
Path Length	N/A
Max Width	N/A
Injuries/Deaths	0
Summary: Tornado drifted very slowly from northeast to southwest for roughly 20 minutes according to eyewitness accounts. No structural damage, but some tree damage along a nearby shelter belt. Nearby soybean field was also damaged.

Track Map

Map showing track of slow-moving tornado northwest of Lucas, SD on June 30, 2019


Tornado viewed from the west. Courtesy of Jon Sperl.	Tornado viewed from the south. Courtesy of Shania Mock	Tornado photo courtesy of Gary Dozark	Shelter Belt damaged by tornado. Photo courtesy of Erin Schulte.

The Enhanced Fujita (EF) Scale classifies tornadoes into the following categories:

EF0 Weak 65-85 mph	EF1 Moderate 86-110 mph	EF2 Significant 111-135 mph	EF3 Severe 136-165 mph	EF4 Extreme 166-200 mph	EF5 Catastrophic 200+ mph

Radar

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Reflectivity Loop from 402 pm to 532 pm in Gregory and Charles Mix Counties.	Storm Relative Velocity Image at 423 pm, showing multiple rotating storms.	Toggling Reflectivity and Storm Relative Velocity at 423 pm.