- Big weather pattern change underway:
- Colder and snowier in the west; wetter and warmer in the east;
- increasing risk of periodic severe weather events in the lower and mid Mississippi River Valley.
- See post for details.
For more information, check out the latest weather animations.
Here’s the long-range travel & RV weather outlook (last updated Sunday 5 December – next update this afternoon)
— WA Olympic Mountains above 3000 feet: Winter Weather Advisory through early Thursday morning. 6-9 inches snow likely.
— WA and OR Cascades above 2000 feet: Winter Storm Warnings (WA) and Advisories through Thursday morning. Expect 8-18 inches snow and winds gusting to 35 mph. I-90 impacted.
— Southwest ID: Dense Fog Advisory though midmorning for the Upper Treasure Valley. I-84 impacted.
— Northeast and central CA, along and east of the Sierras; higher elevations of eastern, central and western NV: Winter Storm Advisories Wednesday evening through Thursday afternoon. 2-5 inches snow in the lower valleys, 3-6 inches expected 4000-6000 feet; 6-12 inches possible above 7000 feet. Winds could gust up to 40 mph. I-80, US-50, US-395 impacted.
— Southern CA Antelope Valley and western Mojave Desert: Wind Advisories tonight and Thursday. Gusts to 50 mph. I-5, I-40, CA-58 impacted.
— MT Rocky Mountain Front: High Wind Warning through this evening. Gusts 75-90 mph.
— Central MT: High Wind Warning through this evening. Gusts to 65 mph. I-15 impacted.
— South-central MT: High Wind Warning through this evening. Gusts 50-60 mph. I-90, US-191 in the vicinity of Big Timber impacted.
— Southeast WY: High Wind Warnings through early Thursday morning. Gusts 70-80 mph. Both I-25, I-90 highly impacted.
— Southwest, central, northeast UT; southern and southeast WY; central CO: Winter Storm Watches and Advisories (WY) late tonight through Friday afternoon. Accumulations will vary between 2-6 inches in the valleys to 1-2 feet in the mountains. I-15, I-25, I-70, I-80 will all be significantly impacted.
— Northeast AZ, southeast UT, southwest CO, much of NM: Thursday afternoon and evening, expect wind gusts 40-60 mph over higher terrain and through the usual windier passes. No advisories or warnings issued at this time. I-25, I-40 will likely be impacted.
— North-central NM Sangre de Cristo Mountains and Glorieta Mesa: High Wind Watch late this afternoon and tonight. Gusts to 70 mph. I-25 impacted.
— Northern NE and adjacent SD, northern IA, southeast MN, west-central WI: Winter Storm Watches late Thursday night through Friday night. Potential accumulations 4-8 or more inches. Storm will move from west to east. I-29, I-35, I-90 impacted.
— MI along the Lake Michigan shoreline: Winter Weather Advisories through midday. 1-3 inches additional accumulation possible. US-31 impacted.
— Southeast LA, southern MS, southern AL, southern GA, FL north of Lake Okeechobee: Dense Fog Advisories through late this morning. I-4, I-10, I-12, I-75, I-95 impacted.
— Western NY downwind of Lake Ontario: Winter Weather Advisories today. 3-6 inches snow. I-81 impacted.
— DownEast ME: Winter Weather Advisory this afternoon through Thursday morning. 4-6 inches snow expected.