Atmospheric River in the Pacific Northwest and Northern Rockies this Weekend

A Pacific storm and atmospheric river will impact the Pacific Northwest states and northern Rockies this weekend, bringing locally heavy low elevations rain and heavy high elevation snow in the mountains. By Sunday over the Interior Northwest, rain combined with snowmelt will increase the risk of flood hazards. Flood Watches are in effect. Read More >

Overview

A spring storm swept east across Wyoming, Friday, April 26th resulting in various weather conditions. Showers and a few thunderstorms pushed east into western Wyoming during the predawn hours Friday. Heavy snow occurred above 9000 feet with this activity, and Togwotee Pass became slick and snowpacked early Friday morning. The showers and a few thunderstorms then gradually shifted to areas east of the Continental Divide Friday morning. Isolated to locally scattered thunderstorms continued Friday afternoon with most of the thunderstorm activity generally along and south of a Jackson to Casper line.

A weak thunderstorm pushing east off the Wyoming Range into the Upper Green River Basin spawned a weak tornado that impacted Marbleton, Wyoming around 1230 PM.

Strong winds (45+ mph) were observed across much of western and central Wyoming Friday afternoon and evening from a combination of winds associated with thunderstorms, a tight pressure gradient, and a strong cold front.

Please click on the tabs below for more information about this event.

Marbleton Tornado Video (courtesy of Tobi Holt)

Tornado
Photos
Radar
Peak Wind Gusts

Tornadoes:

Tornado - LOCATION
Sublette County, Wyoming
Marbleton

Date	Friday, April 26, 2019
Time (Local)	12:30-12:31 pm MDT
EF Rating	EF0
Est. Peak Winds	80 mph
Path Length	0.1 miles
Max Width	20 yards
Injuries/Deaths	0
Summary: A weak tornado very briefly touched down in Marbleton at 510 Rakestraw, and moved a tenth of a mile before lifting. A portion of a roof was blown off a manufactured home, a travel trailer was destroyed at the same residence and another mobile home nearby was moderately damaged. Damage with this tornado was consistent with an EF-0 tornado, which was assessed at having 80 mph winds.

Track Map

Marbleton, Wyoming Tornado - April 26, 2019

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