National Weather Service United States Department of Commerce

Strong winds, colder temperatures, and wintry precipitation expected from the Northeast to New England

A strong cold front and low pressure system will bring strong winds with gusts over 50 mph possible across much of the Middle Atlantic, Northeast, and New England into Sunday night. The strong winds could knock down trees & power lines, and lead to scattered power outages. In addition, the potential exists for snow and ice in portions of New England which could lead to hazardous travel conditions. Read More >

Monday Severe Weather Banner

A supercell picture taken near Douglas on July 24, 2011.
A supercell picture taken near Douglas on July 24, 2011.

Main Watch/Warning Program Planning for a Disaster Severe Weather Safety Lightning Safety Fire Weather

Severe Weather Terminology

Funnel Cloud: A funnel-shaped cloud, extended outward or downward from a thunderstorm, that corresponds to a rotating column of air. If the rotation is violent and reaches the ground, the funnel cloud is associated with a tornado.

Tornado: A violently rotating column of air, in contact with the ground, that extends from the base of a thunderstorm to the ground. This is often visible as a funnel cloud with swirling dust or debris near the surface.

Severe Thunderstorm: A thunderstorm that produces hail one inch or larger in diameter (quarter size) and/or a wind gust to 58 mph or higher.

Microburst: A convective downdraft with an affected outflow area of less than 2½ miles wide and peak winds lasting less than 5 minutes. Microbursts may induce dangerous horizontal/vertical wind shears, which can adversely affect aircraft performance and cause property damage.

Straight-line Winds: Generally, any wind that is not associated with rotation, used mainly to differentiate them from tornadic winds.

Flash Flood: A sudden inundation of water in low-lying areas, usually brought on by heavy rain, dam break, rapid snowmelt or ice jams.

Watch: The potential exists for severe weather to occur within the next 8 hours but the exact location and timing is not known. Action can be taken to protect property such as putting your vehicle in the garage, putting away patio furniture, etc.

Warning: Severe weather either is occurring or will be shortly. Immediate action should be taken to protect yourself by going to the lowest portion of a sturdy building, or into a closet, hallway or room without windows.



Severe Weather Climatology

Wyoming experiences a full range of weather related hazards. The following graphics show the number of public reported severe weather related events across Wyoming. This data is from 1950 through 2014. The severe weather season in Wyoming runs roughly from mid-April through September with the majority of the severe weather occuring between 2 p.m. and 7 p.m.

Hail Statistics GTE 2 Inch
Hail Statistics GTE 1 Inch
Wind Statistics GTE 70 MPH
Wind Statistics GTE 58 MPH
Wyoming Tornado Statistics from 1950 to 2015