- Dangerous heat expected this week from the Upper Midwest and Great Lakes to the Southern U.S.
- Monsoonal showers and thunderstorms may produce flash flooding in New Mexico through tonight.
- Slight risk of severe thunderstorms Wednesday afternoon and evening from the New York Finger Lakes southward to eastern West Virginia and northern Virginia.
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Pacific:
— No significant impacts to RV travel today or Wednesday.
Mountain:
— Most of NM except eastern and northwest portions of state; far-west TX: Flood Watch through late tonight for excessive monsoon rainfall. I-10, I-25, I-40 potentially impacted.
Central:
— No significant impacts to RV travel today or Wednesday.
Eastern:
— NY Southern Tier; much of PA; eastern WV; most of MD; DC; northern VA: Slight risk of severe thunderstorms Wednesday afternoon and evening. I-64, I-68, I-70, I-76, I-80, I-81, I-84, I-86, I-88, I-99, PA Turnpike.
Severe Weather and Tropical Watches and Warnings
— See https://rvweather.com/warnings-watches-and-advisories/#SPC_Tornado_Watch for the latest Tornado and Severe Thunderstorm WATCHES
— See https://rvweather.com/warnings-watches-and-advisories/#NWS_Tornado_Warning for the latest Tornado, Severe Thunderstorm, and Flash Flood WARNINGS.
— See https://rvweather.com/warnings-watches-and-advisories/#NHC_Hurricane_Advisory for the latest Tropical system WARNINGS and information.
Heat index Tuesday afternoon 21 June 
24 hour rainfall amounts Tuesday afternoon through Wednesday afternoon 21-22 June
ALL entrances to Yellowstone National Park remain CLOSED. The South Loop will reopen at 8 a.m. Wednesday 22 June, but access will depend on your vehicle’s license plate. Please see Yellowstone’s flood recovery website for important information.
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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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