Three things to know about weather for RVers and travelers Wednesday 20 September


  • Rain/snow mix for the higher elevations in the northern Rockies starting tonight.
  • Significant severe weather outbreak possible Friday and Saturday across the Central Plains and Mid-Mississippi Valley, respectively.
  • Possible tropical system to form off the Southeast Coast and impact coastal Carolinas and Mid-Atlantic Coast this weekend.

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Starting Monday morning, 27 November, this site will be down for a major upgrade. RVWeather.com will return no later than Wednesday 29 November — sooner if possible. When the site returns, WILMA, our NEW(!) integrated weather impacts product, will be available. The Paywall will also be implemented. RV Weather will continue to provide free access to essential, RV-relevant National Weather Service Warnings and Advisories, current weather, and weather safety information. While the main site is off-line, I will post a simple forecast to my email list and to RVWeather on Facebook.


From the RV Weather Summer Office in Colter Bay Wyoming:

These are the most significant weather impacts to RV travel over the next two to three days. I do not list every area of rain, showers, or breezy winds. (It would be exhausting for both of us!). Please check out the animations and graphics for a good depiction of the weather along your route.

Pacific:

— South-central OR and northeast CA: Freeze Watch tonight and early Thursday morning. Low temperatures in the upper 20’s and lower 30’s.

Southern CA Mojave Desert and Mojave Desert Slopes: Wind Advisory Thursday afternoon through late evening. Gusts to 50 mph. US-395, CA-14, CA-58 impacted.

Mountain:

Higher elevations of western MT; ID; western WY, generally above 8000 feet: Several inches of wet snow possible tonight through early Saturday morning. Most of the snow will fall at night, with rain or a rain/snow mix in the daytime. Major highways should not be impacted, but high mountain passes on secondary roads will likely see snow cover.

— Eastern CO; eastern NM: Isolated strong to severe thunderstorms possible Thursday and Thursday night. Wind and hail are the primary hazards. I-40, I-70, I-76 potentially impacted.

— East-central AZ; west-central NM: Strong winds Thursday afternoon and evening. Wind gusts 30-40 mph. I-40 impacted.

— Much of MT east of the Rockies: Heavy rain on Friday and Friday night. 1-2 inches of rainfall possible. Slight risk of flash flooding. I-15, I-90, I-94 impacted.

Central:

— East-central and northeast OK; adjacent northwest AR: Flood Watches this morning. An additional inch of rain is possible. I-40, I-44 potentially impacted.

Eastern OK and adjacent western AR: Thunderstorms, associated with hail and marginally severe winds, possible late this afternoon and this evening. I-30, I-40, I-44 potentially impacted.

— Southern SD; western and central NE; western and central KS; much of OK; northern TX: Isolated strong to severe thunderstorms possible Thursday and Thursday night. Wind and hail are the primary hazards. I-20, I-30, I-35, I-40, I-44, I-70, I-80, I-90 potentially impacted.

— Eastern OK: Heavy rains from thunderstorms possible Thursday and Thursday night. 1-3 inches rain. I-40, I-44 impacted.

South-central SD; central NE; north-central KS: Scattered strong to severe thunderstorms, capable of producing tornadoes, severe wind and hail, are expected on Friday. I-70, I-80, I-90 potentially impacted.

— Southwest ND; western SD: Heavy rain on Friday and Friday night. 1-2 inches of rainfall possible. Slight risk of flash flooding. I-90, I094 impacted.

Eastern:

— Coastal NC; Tidewater VA; southern DELMARVA Peninsula: 2-4 inches of rain possible Friday and Friday night, along with a slight risk of flash flooding. I-64, US-13, US-17 impacted.

Coastal Carolinas and Mid-Atlantic Coast: Heads up for weekend RV travelers: A non-tropical area of low pressure is expected to form east of the Florida peninsula late this week. This system could acquire some subtropical characteristics by this weekend while it moves generally northward. Regardless of subtropical development or its possible designation as a named storm, this low could produce gusty winds, heavy rain, and high surf conditions this weekend.



Severe thunderstorm risk today and tonight.
Wildfire smoke concentrations late this afternoon and evening Wednesday 20 September
Severe thunderstorm risk tomorrow and tomorrow night.
Total rainfall amounts for the next three days
Total snowfall amounts for the next three days

Current Severe Thunderstorm and Tornado Watches from the National Weather Service Storm Prediction Center


Tropical weather outlook from the National Hurricane Center


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


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


Some useful links:

High-resolution radar

Your local forecast

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