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United States Active Warning and Alerts Center

Every Active Weather Warning and Alert is available to view on this page.

All Active Warning and Alerts are listed in the menu below displayed with the current number of active alerts. Simply Click on the Alert Name to view those alerts Nationwide. Please Note: Alerts are automatically updated every minute. There may be a minute lag time for active alerts to display or expired alerts to no longer display.




Winter Storm Warning(s)



Winter Storm Warning issued May 17 at 12:45PM MDT until May 18 at 6:00PM MDT by NWS Cheyenne WY

WINTER STORM WARNING IN EFFECT FROM 6 PM THIS EVENING TO 6 PM MDT MONDAY

Carbon County, WY

* WHAT...Heavy snow expected. Total snow accumulations up to 15
inches. Winds gusting as high as 50 mph with periods of blowing
and drifting snow.

* WHERE...Sierra Madre Range.

* WHEN...From 6 PM this evening to 6 PM MDT Monday.

* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact the Monday morning and evening
commutes. Strong winds could cause tree damage.

* ADDITIONAL DETAILS...North to northeast facing slopes and ridges
will see the highest accumulations, with accumulations much lower
on the western side of the range near Dixon and Baggs.

...PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. The latest road conditions for
the state you are calling from can be obtained by calling 5 1 1.


Winter Storm Warning issued May 17 at 12:45PM MDT until May 18 at 6:00PM MDT by NWS Cheyenne WY

WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 6 PM MDT MONDAY

Albany County, WY Converse County, WY Platte County, WY Carbon County, WY

* WHAT...Heavy snow. Total snow accumulations 10 to 20 inches
expected. Winds could gust as high as 30 to 40 mph with periods of
blowing and drifting snow, especially above 8500 feet.

* WHERE...Snowy Range and North Laramie Range.

* WHEN...From 6 PM this evening to 6 PM MDT Monday.

* IMPACTS...Heavy wet snow. Roads, and especially bridges, will
likely become slick and hazardous.

...PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. The latest road conditions for
the state you are calling from can be obtained by calling 5 1 1.


Winter Storm Warning issued May 17 at 12:45PM MDT until May 18 at 6:00PM MDT by NWS Cheyenne WY

WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 6 PM MDT MONDAY

Carbon County, WY Albany County, WY

* WHAT...Heavy snow and periods of drifting snow. Total snow
accumulations 6 to 12 inches with higher amounts near the
mountains. Winds could gust as high as 35 to 45 mph with periods
of blowing and drifting snow.

* WHERE...North Snowy Range Foothills including Arlington and Elk
Mountain along Interstate 80, and Ferris/Seminoe/Shirley Mountains.

* WHEN...From 6 PM this evening to 6 PM MDT Monday.

* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous. Scattered power outages
possible due to heavy wet snow on trees and powerlines.

...PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. The latest road conditions for
the state you are calling from can be obtained by calling 5 1 1.

Persons should delay all travel if possible. If travel is absolutely
necessary, drive with extreme caution and be prepared for sudden
changes in visibility. Leave plenty of room between you and the
motorist ahead of you, and allow extra time to reach your
destination. Avoid sudden braking or acceleration, and be especially
cautious on hills or when making turns. Make sure your car is
winterized and in good working order.


Winter Storm Warning issued May 17 at 12:45PM MDT until May 18 at 6:00PM MDT by NWS Cheyenne WY

WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 6 PM MDT MONDAY

Albany County, WY Laramie County, WY

* WHAT...Heavy snow. Total snow accumulations 6 to 10 inches
expected with locally higher amounts. Winds could gust as high as
30 to 40 mph with some drifting snow expected.

* WHERE...South Laramie Range including the Interstate 80 Summit
between Cheyenne and Laramie.

* WHEN...From 6 PM this evening to 6 PM MDT Monday.

* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous.

...PRECAUTIONARY/PREPAREDNESS ACTIONS...

Persons should delay all travel if possible. If travel is absolutely
necessary, drive with extreme caution and be prepared for sudden
changes in visibility. Leave plenty of room between you and the
motorist ahead of you, and allow extra time to reach your
destination. Avoid sudden braking or acceleration, and be especially
cautious on hills or when making turns. Make sure your car is
winterized and in good working order.


Winter Storm Warning issued May 17 at 12:45PM MDT until May 18 at 6:00PM MDT by NWS Cheyenne WY

WINTER STORM WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 6 PM MDT MONDAY

Carbon County, WY

* WHAT...Heavy snow and periods of blowing snow. Total snow
accumulations 5 to 10 inches expected with locally higher amounts
near the mountains. Winds could gust as high as 45 mph.

* WHERE...Central Carbon County.

* WHEN...From midnight tonight to 6 PM MDT Monday.

* IMPACTS...Visibilities may drop below 1/4 mile due to falling and
blowing snow.

...PRECAUTIONARY/PREPAREDNESS ACTIONS...

Persons should delay all travel if possible. If travel is absolutely
necessary, drive with extreme caution and be prepared for sudden
changes in visibility. Leave plenty of room between you and the
motorist ahead of you, and allow extra time to reach your
destination. Avoid sudden braking or acceleration, and be especially
cautious on hills or when making turns. Make sure your car is
winterized and in good working order.


Winter Storm Warning issued May 17 at 10:58PM MDT until May 18 at 9:00PM MDT by NWS Denver CO

WINTER STORM WARNING IN EFFECT UNTIL 9 PM MDT MONDAY

Boulder County, CO Grand County, CO Jackson County, CO Larimer County, CO

* WHAT...Snow expected. Total snow accumulations of 8 to 18 inches.
Highest amounts on east facing slopes.

* WHERE...Rocky Mountain National Park and the Medicine Bow Range.

* WHEN...Until 9 PM MDT Monday.

* IMPACTS...Travel could be very difficult and affect the Monday
morning and evening commutes.

...PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in your
vehicle in case of an emergency. The latest road conditions for
Colorado can be obtained by calling 5 1 1 or by going to
www.cotrip.org.

If traveling to the mountains, be prepared for winter driving
conditions. Check cotrip.org for road closures and traction laws.


Winter Storm Warning issued May 17 at 11:55AM MDT until May 18 at 6:00PM MDT by NWS Riverton WY

WINTER STORM WARNING IN EFFECT FROM 6 PM THIS EVENING TO 6 PM MDT MONDAY

Fremont County, WY

* WHAT...Snow expected. Total snow accumulations between 5 and 8
inches, with higher amounts near Sinks Canyon Park.

* WHERE...Lander Foothills.

* WHEN...From 6 PM this evening to 6 PM MDT Monday.

* IMPACTS...Travel could be difficult. The hazardous conditions
could impact the Monday morning commute. Heavy snow could break
tree limbs as many trees have leafed out.

...PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the
official NWS forecast, high end amounts, and low end amounts, visit
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of
Transportation, visit https://wyoroad.info .


Winter Storm Warning issued May 17 at 11:55AM MDT until May 18 at 6:00PM MDT by NWS Riverton WY

WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 6 PM MDT MONDAY

Fremont County, WY Sublette County, WY

* WHAT...Heavy snow expected. Total snow accumulations between 9 and
18 inches, with locally higher amounts at the highest elevations.
Winds gusting as high as 60 mph.

* WHERE...Wind River Mountains East.

* WHEN...From 6 PM this evening to 6 PM MDT Monday.

* IMPACTS...Travel could be very difficult. The hazardous conditions
could impact the Monday morning commute, including over South Pass.

...PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the
official NWS forecast, high end amounts, and low end amounts, visit
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of
Transportation, visit https://wyoroad.info .


Winter Storm Warning issued May 17 at 11:55AM MDT until May 18 at 6:00PM MDT by NWS Riverton WY

WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 6 PM MDT MONDAY

Fremont County, WY Natrona County, WY Sweetwater County, WY

* WHAT...Heavy snow possible. Total snow accumulations between 7 and
12 inches possible with locally higher amounts up to 15 inches.
Winds gusting as high as 55 mph.

* WHERE...Green Mountains and Rattlesnake Range.

* WHEN...From 6 PM this evening to 6 PM MDT Monday.

* IMPACTS...Travel will be difficult. The hazardous conditions will
impact the Monday morning commute.

...PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the
official NWS forecast, high end amounts, and low end amounts, visit
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of
Transportation, visit https://wyoroad.info .


Winter Storm Warning issued May 17 at 11:55AM MDT until May 18 at 6:00PM MDT by NWS Riverton WY

WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 6 PM MDT MONDAY

Natrona County, WY

* WHAT...Heavy snow expected. Total snow accumulations between 3 and
6 inches. Areas of higher amounts up to 8 inches between Hiland
and Casper. Winds gusting as high as 40 mph.

* WHERE...Natrona County Lower Elevations.

* WHEN...From 6 PM this evening to 6 PM MDT Monday.

* IMPACTS...Travel will be difficult, especially along Highway 20/26
between Hiland and Casper. The hazardous conditions will impact
the Monday morning commute. Heavy snow could break tree limbs as
many trees have leafed out.

...PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the
official NWS forecast, high end amounts, and low end amounts, visit
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of
Transportation, visit https://wyoroad.info .


Winter Storm Warning issued May 17 at 11:55AM MDT until May 18 at 6:00PM MDT by NWS Riverton WY

WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 6 PM MDT MONDAY

Natrona County, WY

* WHAT...Heavy snow possible. Total snow accumulations between 10
and 18 inches possible. Winds could gust as high as 40 mph.

* WHERE...Casper Mountain.

* WHEN...From 6 PM this evening to 6 PM MDT Monday.

* IMPACTS...Travel could be very difficult. Areas of blowing snow
could significantly reduce visibility. The hazardous conditions
could impact the Monday morning commute. Heavy snow could break
tree limbs as many trees have leafed out.

...PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the
official NWS forecast, high end amounts, and low end amounts, visit
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of
Transportation, visit https://wyoroad.info .


Winter Storm Warning issued May 17 at 11:55AM MDT until May 18 at 6:00PM MDT by NWS Riverton WY

WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 6 PM MDT MONDAY

Sweetwater County, WY

* WHAT...Heavy snow expected. Total snow accumulations between 7 and
10 inches. Winds gusting as high as 60 mph.

* WHERE...East Sweetwater County.

* WHEN...From 6 PM this evening to 6 PM MDT Monday.

* IMPACTS...Travel will be very difficult, especially along
Interstate 80. The hazardous conditions will impact the Monday
morning commute.

...PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the
official NWS forecast, high end amounts, and low end amounts, visit
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of
Transportation, visit https://wyoroad.info .


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