Travel & RV Weather Forecast Tuesday 20 December

** Heads Up ** High impact winter storm and associated arctic front will create dangerous conditions for RV travel from the Rockies to the Ohio Valley Wednesday through Friday. If you are traveling on I-20, I-40 or I-80 Wednesday night or Thursday, be prepared for wind chills of zero, -25 and -50 deg F, respectively.

  • Snow for much of Washington and the northern Rockies today and tonight.
  • Major winter storm and Arctic Front brings snow to the Midwest and western Great Lakes, and high winds and dangerously cold wind chill values to the Rockies and Plains.
  • Big warm-up for the entire country starts after Christmas.

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Northwest and western WA: Winter Storm Warnings and Advisories through late tonight. Accumulations will range from an inch or two in the low elevations, to 10-24 inches in the mountains. I-5, I-90 impacted.

Eastern WA; northern ID; northeast OR: Winter Storms Warnings and Advisories through Wednesday. 2-8 inches additional snowfall. I-84, I-90 impacted.

— OR Cascades: Winter Weather Advisories this morning continuing through tonight. Snow accumulations generally 4-10 inches.


Western and southern MT; central and southeast ID; western WY; north-central UT: Winter Storm Warnings, Watches and Advisories through Wednesday night. Snow accumulations generally 3-8 inches in the valleys and low elevations to 8-24 inches in the mountains. Wind gusts 35-55 mph and windchill values as low as -50 deg F. I-15, I-80, I-84, I-90 impacted.

MT; eastern and southeast ID; much of WY; north-central and eastern CO: Wind Chill Watches and Warnings Wednesday afternoon through Friday. Windchill values -50 to -60 deg F. I-15, I-25, I-70, I-80, I-84, I-90, I-94 impacted.

Southern and southeast WY: High Wind Warnings and Watches Wednesday along I-80 from east of Cheyenne to Evanston and along I-25 to Casper. Gusts 60-75 mph. Wind chill values -40 to -50 deg F. I-25 ,I-80 impacted.

Central and north-central CO and adjacent south-central WY: Winter Storm Warnings (WY) and Watches Wednesday afternoon and Wednesday night. 4-15 inches snow, wind gusts 60-65 mph and wind chill values -50 to -60 deg F. I-70, I-80 highly impacted.

— South-central CO and north-central NM west of the I-25 corridor and north of Santa Fe: High Wind Watch Wednesday evening through Thursday morning. Gusts to 60 mph.

— East-central and northeast NM: Wind Chill Watch late Wednesday night through Friday morning. Wind chill values as low as -25 deg F. I-25, I-40 impacted.


Most of ND; SD; southeast MN; western IA; NE; most of OK and MO; northern AR; TX Panhandle: Wind Chill Watches and Warnings associated with the Arctic Front late Wednesday through Friday morning. Wind chill values will be around -25 deg F on I-40; -40 deg F on I-70 and -50 deg F on and north of I-80. I-29, I-35, I-40, I-44, I-70, I-80, I-90, I-94 impacted.

Eastern MN; western and southern WI; central and northern IL; most of IA; central and northern MO; most of eastern and northern KS; south-central NE: Winter Storm Watches Thursday and Friday. Accumulations generally 2 to 6 inches and wind gusts to 50 mph. Major highways impacted include I-35, I-39, I-43, I-55, I-57, I-70, I-72, I-74, I-80, I-88, I-90, I-94.

— Central and northern AL: Wind Chill Watch late Thursday night through Saturday morning. Wind chill values zero to -10 deg F. I-20, I-22, I-59, I-65, I-85 impacted.


Northern and central IN and adjacent southwest MI and northwest OH: Winter Storm Watches Thursday evening through Saturday morning. Precipitation starts as snow, sleet and freezing rain before becoming all snow late Thursday night. Accumulations of 6 inches or more are possible. Wind gusts 50-55 mph. I-65, I-69, I-70, I-74, I-75, I-80/90, I-94, OH Turnpike, IN Toll Road impacted.

Portions of northeast WV and far-western MD: Winter Storm Watch Thursday. Heavy wintery precipitation possible with snow accumulations greater than 6 inches and ice accumulations of 1/4 inch or more. I-68 impacted.

Access to real-time road information:

Phone numbers and websites for road conditions in all 50 states. Courtesy of the Cheyenne WY Weather Forecast Office

Severe Weather and Tropical Watches and Warnings

— See for the latest Tornado and Severe Thunderstorm WATCHES

— See for the latest Tropical Cyclone WARNINGS and information.

— See for the latest Tornado, Severe Thunderstorm, and Flash Flood WARNINGS.

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