- High winds today over much of eastern New Mexico and southern Colorado.
- Severe weather threat starting today through Friday for parts of the Mississippi and Ohio Valleys; greatest threat on Friday.
- Significant flash flooding possible Friday across the Ohio Valley.
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Pacific:
— WA southern Cascade Mountains; OR Cascades; southwest WA, OR and northwest CA coastal Mountains: Winter Storm Watches above 2500 feet Thursday and Friday. Snow accumulation could reach 1-2 feet in the Cascades and 6-12 inches in the coastal ranges. Wind gusts to 40 mph. I-5 (Grants Pass), US-101 potentially impacted.
— Central and east-central NV: Flood Watches through this afternoon. Flooding caused by a combination of rain and snowmelt. US-6, US-50, US-93 impacted.
— Central CA coastal area between San Francisco and Monterey Bay: Flood Advisories continue through midday today. US-101, CA-1 potentially impacted.
— Much of central and southern CA below 4000 feet: Flood Watches and Advisories through this evening due to heavy rains, saturated soils and already high stream levels. Major highways potentially impacted include I-5, I-8, I-10, I-15, US-101, CA-1, CA-99.
— Southern CA Sierra Nevada Mountains: Winter Storm Warnings through late this evening. Total snow accumulations 1-4 feet of snow above 4000 feet with wind gusts to 60 mph.
— Southern CA Coastal Mountains from Santa Barbara to San Diego Counties: Winter Storm Warnings and Advisories through early Thursday morning. Additional accumulations 3-10 inches above 4000 feet and 2-3 feet of snow above 6000 feet. Wind gusts 60-70 mph. The passes on I-5 (Grapevine), I-8, and I-15 impacted.
Mountain:
— Southeast ID; much of WY: Winter Weather Advisories through late this evening. Snow accumulations will range from 2-4 inches in the valleys and Plains, to a foot or so over the higher passes and in the Mountains. I-15, I-25, I-80, I-84, I-90, US-26, US-89 impacted.
— Southeast WY: High Wind Watches through tonight. Gusts to 60 mph. I-25, I-80 impacted.
— North-central and northeast, central and southwest UT; central and western CO; north-central NM: Winter Storm Warnings and Advisories through late tonight. Total snow accumulations of 1-3 feet likely. Wind gusts 55-70 mph. This region is west of I-25. I-15, I-70, I-80, I-84 impacted.
— Portions of northern AZ above 6500 feet: Winter Storm Warnings through this evening. Snow accumulations generally 2-6 inches. Wind gusts to 55 mph this morning, slowly decreasing throughout the day. I-17, I-40 impacted.
— West-central and central AZ: Flash Flood Watches through this evening due to excessive rainfall. Rainfall amounts may total 1-2 inches. I-17, I-40 potentially impacted.
— Much of eastern and southeast AZ: Wind Advisories through this afternoon. Gusts 45-55 mph. I-19 and Tucson are west of this advisory area. I-10, I-40 impacted.
— South-central and southeast CO; eastern, central and southern NM; adjacent northwest TX and far-west OK Panhandles: High Wind Warnings and Advisories through this evening. Wind gusts 50-70 mph. Strongest winds will be over central, east-central and northeast NM and CO late this morning through mid-afternoon with wind gusts 65-70 mph. I-10, I-25, I-40, US-24 impacted.
Central:
— West-central SD: Winter Weather Advisory this afternoon and tonight. 2 inches snow likely. I-90 impacted.
— North-central NE: Winter Weather Advisory this evening through Thursday morning. Mixed precipitation possible. Up to 3 inches of snow, along with a light glaze of ice. US-20, US-83 impacted.
— Central and northwest KS; adjacent northeast CO and southwest NE: Dense Fog Advisories through midday today. I-35, I-70, US-34, US-36 impacted.
— Western KS; western OK; TX Panhandle: Strong winds this afternoon and early evening. Wind gusts to 50 mph. I-27, I-40, I-70 impacted.
— Northern MO; southern IA; north-central IL: Isolated strong to severe thunderstorms capable of large hail are possible late tonight. I-29, I-35, I-70, I-72, I-74, I-80 potentially impacted.
— West-central and north-central TX; central and eastern OK: Severe thunderstorms capable of large hail and damaging winds possible between Thursday afternoon and Friday morning. There is a possibility these severe storms will extend north and east through MO, into IL and northwest IN. I-10, I-20, I-35, I-40, I-44 impacted.
— AR; LA and adjacent eastern TX; MS; western and northern AL; western TN and KY: Supercell severe thunderstorms will be capable of producing large hail, damaging wind gusts and strong tornadoes Friday. Greatest risk over eastern LA, western MS and southeast AR. I-10, I-12, I-20, I-22, I-24, I-30, I-40, I-55, I-59, I-65 potentially impacted.
— Eastern OK; northwest and north-central AR; southern and central MO; central and southern IL: Slight change of flash flooding due to excessive rainfall Thursday and Thursday night. 1-3 inches of rain possible. I-24, I-35, I-40, I-44, I-55, I-57, I-64, I-69, I-70, I-72, I-74 potentially impacted.
— Southeast MO; AR; northern MS; northwest AL; central and western TN; KY; southern IL: Significant risk of flash flooding Friday and Friday night. Areas of over 3 inches of rain are quite likely; some locations may see as much as 5 inches. Greatest risk for flash flooding will be along the Ohio Valley and northeastern Ozarks. I-20, I-22, I-24, I-30, I-40, I-55, I-57, I-64, I-65, I-69, I-75 potentially impacted.
Eastern:
— Much of northern IN: Isolated strong to severe thunderstorms capable of large hail are possible late tonight. I-65, I-69, I-74 potentially impacted.
— Southern IN: Slight risk of flash flooding due to excessive rainfall Thursday and Thursday night. 2-4 inches of rain possible. I-64, I-65, I-69, I-70, I-74 potentially impacted.
— Southern and central IN; most of OH; western WV; central and eastern KY: Significant risk of flash flooding Friday and Friday night. Areas of over 3 inches of rain are quite likely; some locations may see as much as 5 inches. Greatest risk for flash flooding will be along the Ohio Valley and northeastern Ozarks. I-64, I-65, I-69, I-70, I-71, I-74, I-75, I-77, I-79 potentially impacted.
— Portions of northern FL Peninsula: Dense Fog Advisories through mid-morning. I-75, I-95 impacted.
— Far-northern ME: Winter Weather Advisory Thursday and Thursday night. 4-7 inches snow.
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
Current Severe Thunderstorm and Tornado Watch from the National Weather Service Storm Prediction Center
Real-time severe weather (TORNADO, hail, flash flood) warnings
Tornado safety information for RVers (what to do!):
Weather Hazards as of Wednesday morning 22 March. Click on graphic for real-time update. 
Wind gusts this afternoon 22 March 
Likelihood of winter weather impacting RV travel today 22 March 
Severe thunderstorm risk Thursday 23 March 
Flash Flood Risk Thursday 23 March 
Wind gusts Thursday afternoon 23 March 
Likelihood of winter weather impacting RV travel Thursday 23 March (west) 
Likelihood of winter weather impacting RV travel Thursday 23 March (east) 
Severe thunderstorm risk Friday 24 March 
Flash Flood Risk Friday 24 March 
Wind gusts Friday 24 March 
Likelihood of winter weather impacting RV travel Friday 24 March (west) 
Likelihood of winter weather impacting RV travel Friday 24 March (east) 
Total snowfall accumulations Friday night 24 March 
Total precipitation amounts through Friday night 24 March
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Some useful links:
All the Latest RV Weather forecasts
Latest severe weather watches and warnings
Current near-term weather graphics
(For serious weather geeks!) National Weather Service Mesoscale Outlooks
General National Weather Service info
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