Travel weather forecast.

Major storm for central and southern California, the Great Basin and Southwest starting tonight.
Heavy snow and high winds for the southern California mountains and passes; high winds for much of New Mexico and Colorado on Wednesday.
Chance for large hail over northern Missouri Wednesday evening.

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Pacific:

— Northeast CA and the eastern slopes of the Sierra Nevada: Winter Weather Advisories continue through this morning. Total snow accumulations above 5000 feet around 4 inches. US-395 impacted.

— CA Sierra Nevada Mountains: Winter Storm Warnings continue through this morning. Additional accumulations up to 4 inches. Wind gusts to 35 mph. I-80, US-50 impacted.

— CA Sierra Nevada Mountains: Winter Storm Watches early Tuesday morning through Wednesday evening. 4-8 inches snow with an additional 1-2 feet across higher elevations. Wind gusts to 40 mph. Snow levels 3000-5000 feet. I-80, US-50 impacted.

— Central and east-central NV: Flood Watches through Wednesday afternoon. Flooding caused by a combination of rain and snowmelt. US-6, US-50, US-93 impacted.

— Central, east-central and southern NV above 6000 feet: Winter Storm Warnings and Watches late tonight through Wednesday afternoon. 6-18 inches snow possible. Wind gusts to 45 mph. US-6, US-50, US-93, US-95 impacted.

— Central CA Coast, including Salinas Valley and East Bay Area: Wind Advisories Tuesday and Tuesday evening. Gusts to 50 mph. US-101, CA-1 impacted.

— Central and southern CA Coast from San Luis Obispo to Los Angeles: High Wind Watch Tuesday and Tuesday evening. Gusts to 60 mph. I-5, I-10, US-101, CA-1 impacted.

— Southeast and southern CA; southern NV: High Wind Watches and Advisories Tuesday and Tuesday night. Wind gusts mostly 50-55 mph except gusts 60-80 mph in the mountain passes. Major highways impacted include I-5, I-8, I-10, I-15, I-40, US-395, CA-58.

— Southern CA Coastal Mountains from Santa Barbara to San Diego Counties: Winter Storm Warnings, Watches and Advisories Tuesday morning through Wednesday afternoon. 2-10 inches snow above 4000 feet and 2-4 feet of snow above 6000 feet. Wind gusts 70-80 mph. The passes on I-5 (Grapevine), I-8, and I-15 all likely impacted.

— Central and southern CA coastal regions: Slight risk of flash flooding from heavy rains on Tuesday. Up to 2.5 inches of rain possible. Major highways impacted include I-5, I-8, I-10, I-15, US-101, CA-1, all greater Los Angeles freeways.

Mountain:

— Central and southwest MT; central and southeast ID; west-central WY: Winter Weather Advisories through Tuesday morning. Snow accumulations generally 2-5 inches in the valleys and up to a foot in the mountains. I-15, I-90, US-26, US-89 impacted.

— Southeast WY: High Wind Watch late tonight through Tuesday afternoon. Gusts to 60 mph. I-25, I-80 impacted.

— North-central and northeast, central and southwest UT: Winter Storm Warnings and Watches through Wednesday night. Total snow accumulations of 1-3 feet likely. I-15, I-70, I-80, I-84 impacted.

— Western AZ: Wind Advisory Tuesday and Tuesday night. Gusts to 55 mph. Blowing dust and areas of suddenly decreased visibility will be a hazard on the main highways. I-8, I-10, I-40 impacted.

— Portions of northern AZ above 6500 feet: Winter Storm Warnings and Advisories through Wednesday afternoon. Snow accumulations generally 3-5 inches. I-17, I-40 impacted.

— East-central UT; south-central WY; central and southwest CO; north-central NM: Winter Storm Warnings and Advisories Monday afternoon through Wednesday night. Multiple rounds of snow will accumulate 1-3 feet in many areas. Wind gusts to 65 mph, especially on Wednesday. This region is just south of I-80 in WY and just north and west of I-25 in NM and CO. I-70 impacted.

— West-central and central AZ: Slight risk of flash floods Tuesday and Wednesday due to excessive rainfall. Rainfall amounts may total 1-2 inches. I-17, I-40 potentially impacted.

— Most of CO and NM, north of I-10: High winds much of Wednesday. Widespread gusts 50-70 mph. I-25, I-40, I-70 impacted.

— South-central NM Sacramento Mountains: Wind Advisory this evening through Tuesday morning. Gusts to 55 mph. This region is just east of White Sand NP, Alamagordo, and US-54. US-70, US-82 impacted.

— Southeast NM and adjacent far-west TX Delaware and Guadalupe Mountains: High Wind Warning late Monday night through Tuesday evening. Gusts to 70 mph. US-180 impacted.

Central:

— Western ND; northeast SD: Dense Fog Advisories this morning. I-94 impacted.

— Eastern ND; northwest and north-central MN: Winter Storm Watches Tuesday afternoon through Wednesday morning. 3-7 inches snow possible. I-29, I-94 impacted.

— South-central KS: Wind Advisory midday today through this evening. Gusts to 45 mph. I-35, I-70 impacted.

— Northeast KS; northern MO: Strong to severe thunderstorms capable of large hail are possible Wednesday evening. I-29, I-35, I-70 potentially impacted.

Eastern:

— No significant weather impacts to RV travel today or Tuesday.

— The large area of dark blue across the Southeast on the weather hazards map shows where tonight’s low temperatures will be in the upper 20’s and lower 30’s.

Tornado safety information for RVers (what to do!):

Weather Safety Tips

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

Weather Hazards as of Monday morning 20 March. Click on graphic for real-time update.
Wind gusts this afternoon 20 March
Likelihood of winter weather impacting RV travel today 20 March
Flash Flood Risk Tuesday 21 March
Wind gusts Tuesday afternoon 21 March
Likelihood of winter weather impacting RV travel Tuesday 21 March
Severe Thunderstorm Risk Wednesday 22 March
Wind gusts Wednesday afternoon 22 March
Likelihood of winter weather impacting RV travel Wednesday 22 March
Total snowfall accumulation through Wednesday night 22 March
Total precipitation amounts through Wednesday night 22 March