Travel & RV Weather Forecast Sunday 18 September


  • Severe thunderstorms likely over eastern Iowa and Illinois late this afternoon through tonight.
  • Rain continues today and Monday for northern and central California.
  • Strong thunderstorms for much of the Northeast on Monday; heavy rains for northwest New England.
  • Tropical Storm Fiona is near Puerto Rico and strengthening. RV’ers in Florida and the Southeast should continue to monitor this storm, but no need to change any plans.

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Pacific:

— Northern and central CA: The first west coast storm of the upcoming winter will produce periods of rain and rainshowers over northern and central CA through the middle of this week. Heaviest rains will be today and Monday.

— CA central Sierra Nevada; central, east-central and northeast NV: Strong winds this afternoon and evening. Gusts 30-40 mph. I-80, US-50 impacted.

— Central and eastern NV: Strong winds Monday afternoon and evening. Gusts to 35 mph. I-80, US-50 impacted.

Mountain:

— Western UT: Strong winds this afternoon and evening. Gusts to 35 mph. I-15, I-80 impacted.

— Southwest and northeast UT; southern and western WY; southern MT: Strong winds Monday afternoon and evening. Gusts to 35 mph. I-15, I-80 impacted.

— Northeast CO and adjacent KS: Dense Fog Advisories this morning. I-70 impacted.

Central:

Southern and east-central IA; northeast MO; most of IL except far-northern and far-southern portions of the state: Scattered severe thunderstorms develop late afternoon and move eastward through the night. Expect hail, wind, and the threat for a few tornadoes. Region under greatest threat is southeast IA and west-central IL. Major highways potentially impacted include I-35, I-55, I-57, I-70, I-74, I-80, I-88.

Central IL: Flash Flood Risk tonight. Strong thunderstorms could produce up to 3-5 inches of rain overnight. I-55, I-57, I-70, I-72, I-74 potentially impacted.

— Northeast MN vicinity Duluth and adjacent WI: Dense Fog Advisories this morning. I-35 impacted.

Eastern:

Western and central IN: Scattered severe thunderstorms develop late afternoon and through the night. Expect hail, wind, and the threat for a few tornadoes. I-65, I-69, I-70, I-74, I-80/90/IN Toll Road potentially impacted.

— Eastern OH; PA; northern NJ; NY; VT; western MA; CT: Strong to marginally severe thunderstorms on Monday. Wind and hail are the primary threats. I-70, I-77, I-79, I-80, I-81, I-83, I-84, I-87, I-88, I-89, I-90, I-91, I-95, I-99 NY Thruway, PA, NJ and Mass Turnpikes potentially impacted.

— Far northeastern NY; northern VT; northern NH: Flash Flood Risk Monday and Monday night. 1-2 inches of rain possible. I-87, I-91, I-93 potentially impacted.


Severe Weather and Tropical Watches and Warnings

— See https://rvweather.com/warnings-watches-and-advisories/#NHC_Hurricane_Advisory for the latest WARNINGS and information on Tropical Storm FIONA.

— 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.



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