UPDATE: The Cheyenne Office of the Nation of the National Weather Service now says Cheyenne is under a blizzard warning starting at 5 p.m. Laramie, meanwhile, now faces a winter storm warning. Both cities had previously been listed as facing only winter weather advisories.

The areas in orange on the map face a blizzard warning, while the pink areas face a winter storm warning:

 

Map of Forecast Area

Original Post: The Cheyenne Office of the National Weather Service is offering more information on a winter storm that is expected to blast much of southeast Wyoming and the Nebraska Panhandle with near-blizzard-to-blizzard conditions.

Here is the travel forecast on the WYDOT website from Dayweather Inc:

Travel Forecast Map

The National Weather Service posted the following on Facebook late Monday morning:

When: Prolonged event - starting late evening west in Carbon County expanding east to the I-25 Corridor + NE Panhandle early Tues. & continuing to late Weds.
Winds increase from the N/NW early Tues. with gusts of 20-30 mph & ramp up Tues afternoon - late Wed, gusting 40-50 mph. Local whiteout conditions expected from falling/blowing snow. Snow drifts of 1-2 feet probable in red/orange areas of Winter Storm Severity impact image below.
The post added more information on what is expected:
''Extra Details: Prolonged Cold Temperatures! Wind Chills will drop below zero to the negative teens Tuesday morning & continue through at least Thursday. Frost bite could easily be possible for anyone one outside or exposed to these temperatures with out proper layering.
More details: Confidence is high of an impacting winter storm & high winds causing localized blizzard conditions. Snowfall amounts may vary but travel impacts are expected. There will be a sharp snow gradient near/north of Cheyenne & points north/east. Stay tuned & stay safe!''
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While Cheyenne and Laramie probably won't get as much snow as some other areas, forecasters can't totally rule out snowfall of as much as 9 inches:

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Here are the latest snowfall estimates:

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Here is the UPDATEDCheyenne Weather Forecast:

Tonight
Snow, mainly after 11pm. Patchy blowing snow after 1am. Low around 12. Wind chill values between -10 and zero. Blustery, with a north northwest wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.
Tuesday
Snow. Widespread blowing snow, mainly before 5pm. High near 20. Wind chill values between -10 and zero. Windy, with a north northwest wind 30 to 40 mph, with gusts as high as 55 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.
Tuesday Night
Snow likely, mainly before 11pm. Areas of blowing snow. Mostly cloudy, with a low around 15. Wind chill values between -10 and zero. Windy, with a northwest wind 25 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Wednesday
Snow likely, mainly before 11am. Widespread blowing snow, mainly between 8am and 11am. Mostly cloudy, with a high near 25. Windy, with a northwest wind 30 to 35 mph, with gusts as high as 55 mph. Chance of precipitation is 60%.
Wednesday Night
Patchy blowing snow. Mostly cloudy, with a low around 15. Blustery.
Thursday
Patchy blowing snow. Mostly sunny, with a high near 24. Windy.
Thursday Night
Patchy blowing snow. Mostly cloudy, with a low around 9. Blustery.
Friday
Patchy blowing snow. Mostly sunny, with a high near 19. Blustery.
Friday Night
Patchy blowing snow before 10pm. Partly cloudy, with a low around 6. Blustery.
Saturday
Sunny, with a high near 25. Blustery.
Saturday Night
Partly cloudy, with a low around 6. Breezy.
Sunday
Mostly sunny, with a high near 27.
Here is the Laramie Forecast:
This Afternoon
Snow after 5pm. High near 37. Breezy, with a northeast wind around 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. Total daytime snow accumulation of less than a half inch possible.
Tonight
Snow. Widespread blowing snow, mainly after 3am. Low around 5. Wind chill values between -5 and -15. Blustery, with a north northeast wind 20 to 25 mph becoming northwest after midnight. Winds could gust as high as 35 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.
Tuesday
Snow. Widespread blowing snow. High near 12. Wind chill values between -15 and -20. Windy, with a northwest wind 30 to 35 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.
Tuesday Night
Snow. Widespread blowing snow. Low around 11. Wind chill values between -5 and -10. Windy, with a west northwest wind 35 to 40 mph, with gusts as high as 55 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.
Wednesday
Snow. Widespread blowing snow. High near 16. Windy, with a west northwest wind 35 to 40 mph, with gusts as high as 60 mph. Chance of precipitation is 90%.
Wednesday Night
A 30 percent chance of snow, mainly before 11pm. Widespread blowing snow, mainly before 10pm. Mostly cloudy, with a low around 11. Windy.
Thursday
Patchy blowing snow. Partly sunny, with a high near 15. Windy.
Thursday Night
A slight chance of snow after 11pm. Patchy blowing snow. Mostly cloudy, with a low around 6. Blustery.
Friday
A slight chance of snow before 11am. Patchy blowing snow. Partly sunny and cold, with a high near 10. Blustery.
Friday Night
Patchy blowing snow. Partly cloudy, with a low around 2. Blustery.
Saturday
Sunny, with a high near 16. Breezy.
Saturday Night
Partly cloudy, with a low around 6. Breezy.
Sunday
Mostly sunny, with a high near 19. Breezy.

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