Wildfire Smoke and Severe Thunderstorms in the East; Monsoon Thunderstorms in the Southwest

Wildfire smoke continues to impact air quality from the Great Lakes region into New England and the Mid-Atlantic today with widespread Air Quality Alerts in effect. Severe thunderstorms are expected across portions of the Ohio Valley and Lower Great Lakes into the Mid-Atlantic and Northeast, this afternoon into the evening. Monsoonal thunderstorms may bring areas of flooding to the Southwest. Read More >

Overview ***Preliminary***

During the late afternoon and evening of June 11, 2018, thunderstorms developed near the surface low pressure system over Dodge county and ahead of a cold front that moved through in eastern Nebraska and a warm front that trailed southeast into western Iowa. In-between these fronts, there appeared to be a pre-frontal boundary that was northeast of Lincoln and west of Plattsmouth. Six confirmed tornadoes, large hail to baseball size and damaging winds accompanied the storms.

Tornadoes

Tornadoes:

Tornado #1 Near Louisville
CASS COUNTY NE

Date	June 11, 2018
Time (Local)	TBD
EF Rating	EF-0
Est. Peak Winds	60 MPH
Path Length	0.1 miles
Max Width	10 yards
Injuries/Deaths	0/0
Summary: Very brief spin up catured on video that did not seem to cause any damage.

Track Map

Tornado #2 Between Louisville/Murray North
CASS COUNTY NE

Date	June 11, 2018
Time (Local)	TBD
EF Rating	EF-0
Est. Peak Winds	75 MPH
Path Length	TBD
Max Width	40 yards
Injuries/Deaths	0/0
Summary: Brief tornado caused damage to trees and minor damage to a building at a rural home location. Also caused damage at a nearby home location where a couple of buildings and trees received damage. Additional data analysis will be needed because this may have been two separate weak tornadoes.

Track Map

Tornado #3 Between Louisville/Murray South
CASS COUNTY NE

Date	June 11, 2018
Time (Local)	TBD
EF Rating	EF-0
Est. Peak Winds	70 MPH
Path Length	TBD
Max Width	20 yards
Injuries/Deaths	0/0
Summary: A brief tornado caused damage to trees. Path length narrow and crops in the area did not show signs of straight line wind damage.

Track Map

Tornado #4 McPaul/West of Thurman
FREMONT COUNTY IA

Date	June 11, 2018
Time (Local)	6:59-7 PM CDT
EF Rating	EF-0
Est. Peak Winds	82 MPH
Path Length	0.1 miles
Max Width	10 yards
Injuries/Deaths	0/0
Summary: Moderate twisting and tearing of tree tops. Several large tree limbs downed from oak and elm trees. Empty tractor trailer moved from mooring blocks. Small, short-lived tornado embedded in broader area of straight-line wind damage.

Track Map

Tornado #5 Elk Creek
JOHNSON COUNTY NE

Date	June 11, 2018
Time (Local)	8:00 - 8:01 PM CDT
EF Rating	EF-0
Est. Peak Winds	72 MPH
Path Length	.1 miles
Max Width	10 yards
Injuries/Deaths	0/0
Summary: Short-lived tornado touched down in pastureland. Slight damage to hardwood trees.

Track Map

Tornado #6 Near Steinauer/Table Rock
PAWNEE COUNTY NE

Date	June 11, 2018
Time (Local)	8:05 PM CDT
EF Rating	EF-0
Est. Peak Winds	74 MPH
Path Length	0.0 miles
Max Width	10 yards
Injuries/Deaths	0/0
Summary: Short-lived tornado touched down in pastureland. Slight damage to hardwood trees.

Track Map

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

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Wildfire Smoke and Severe Thunderstorms in the East; Monsoon Thunderstorms in the Southwest

At Least Six Confirmed Tornadoes - June 11, 2018