Your RV Weather Road Trip Forecast for Monday August 18, 2025

Posted on by dwtitley
  • Extreme heat continues across the South, Southern Plains, Mississippi Valley, and into the Desert Southwest, with widespread highs over 100°F and heat indices 100–112°F; the hottest spots will be around Little Rock, Memphis, southern California, Nevada, Arizona, and the Grand Canyon.
  • Storms and flooding risks remain in play — severe thunderstorms possible today from South Dakota into Nebraska, additional rain over saturated ground in southeast Minnesota and west-central Wisconsin, and a Flood Watch in south-central New Mexico.
  • Hurricane Erin offshore will remain east of the U.S. coastline but bring strong winds, heavy surf, beach erosion, and coastal flooding from Cape Fear, North Carolina through Cape Cod, Massachusetts Wednesday into Thursday night.

From the RV Weather Field Office in State College PA:

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.

Looking for real-time road conditions? Here’s a link, courtesy of the Federal Highway Administration, to all the individual State 511 websites.

Looking for wildfire smoke or hail forecasts? Click here, then scroll down to “High Resolution, Hourly Animations”. Or scroll down to the graphics below.

RV Weather’s Weather Hub has a complete collection of always updating weather graphics and forecasts.

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Weather Impacts Pacific Time Zone:

— Southern CA Santa Barbara Coast and Santa Ynez Mountains: Wind Advisory this evening and tonight. Wind gusts to 45 mph. US-101 impacted.

— Much of southern CA away from the immediate coast; southern and southeast NV: Extreme Heat Watches Wednesday through Saturday. Widespread high temperatures 110-120° F. I-5, I-8, I-10, I-15, I-40 impacted.

Weather Impacts Mountain Time Zone:

— Northeast MT: Heat Advisory Tuesday and Wednesday. High temperatures 95-105° F.

— Eastern and southern AZ: Extreme Heat Watches Wednesday through Saturday. High temperatures 106-115° F. I-8, I-10, I-17, I-19, I-40 impacted.

— AZ Grand Canyon below 4000 feet: Extreme Heat Warnings and Watches Tuesday through Friday. High temperatures 102-112° F.

— South-central NM: Flood Watch late this morning through this evening. Thunderstorms could produce rainfall rates of 1-2 inches per hour. Burn scars are vulnerable to flash flooding. US-70, US-380 potentially impacted.

Weather Impacts Central Time Zone:

— Central ND; north-central and northeast SD: Dense Fog Advisories this morning. I-29, I-94, US-2, US-12, US-14, US-52, US-83 impacted.

— Western and central SD; much of NE: Strong to severe thunderstorms capable of damaging winds and large hail are possible today and tonight. I-80, I-90 potentially impacted.

— Southeast MN and west-central WI: Flood Watches continue this morning. An additional inch of rain could fall on already saturated soils. I-35, I-90, I-94 impacted.

— Southeast IA; much of IL, MO, and AR; central and eastern OK; parts of eastern TX; western KY; western and central TN; northeast LA; much of MS; west-central and northwest AL: A combination of Extreme Heat Warnings, Watches and Advisories today and Tuesday. Heat index values from 100-112°F, with the highest values around Little Rock and Memphis.

Weather Impacts Eastern Time Zone:

— Although the center of Hurricane Erin is forecast to stay well offshore, expect strong, gusty winds, heavy surf, beach erosion and coastal flooding from Cape Fear NC northwards to Cape Cod MA. Winds will increase along the NC coast on Wednesday and impact Cape Cod by Thursday night. No need to alter plans, but be prepared for rough ocean conditions.

— UPDATE (6 pm ET): Mandatory Evacuations for portions of Hatteras and Ocracoke Islands. Visitors are evacuated today and residents will evacuate Tuesday. For more details, see https://www.darenc.gov/Home/Components/News/News/9171/17

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Selected travel-relevant Weather Graphics

Map displaying current weather hazards across the United States, including excessive heat warnings, flood watches, and severe thunderstorm warnings.
Current travel-relevant National Weather Service Warnings, Watches and Advisories

Graphics for Today

Weather map showing severe thunderstorm and tornado watch areas across the U.S. for August 1-2, 2025, including warnings for heavy rain and flash flooding.
National weather map for today..
Weather outlook map showing severe thunderstorm risk levels across the United States for August 1, 2025.
Severe thunderstorm risk today and tonight.

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

Map of the United States indicating 'No Watches In Effect' for severe weather, issued by the National Weather Service.
Satellite image showing the Atlantic and Eastern Pacific regions with no disturbances and a note stating that tropical cyclone activity is not expected during the next 48 hours.
Map showing the Day 1 Excessive Rainfall Outlook with areas marked for risk levels including MRGL, SLGT, and MDT across the United States.
Excessive and Flash Flood Risk for today and tonight.
Weather map showing projected wind gusts across the United States for the afternoon, with regions highlighted in different colors indicating varying wind speeds.

Hail Size Forecast for today and tomorrow

Map showing forecasted hail size across the United States for August 1.
Hail Size (inches) forecast for the next 2 days.

Wildfire Smoke Forecast for today and tomorrow

Map displaying wildfire smoke distribution across the United States for August 1, highlighting varying concentrations with color gradients.
Wildfire smoke forecast for the next 2 days.

Graphics for Tomorrow

Weather map showing severe thunderstorm threats, heavy rain, and flash flood warnings across the United States for August 2-3, 2025.
National weather map for tomorrow.
Severe weather outlook map for August 2, 2025, showing areas of risk across the United States, with a highlighted region indicating enhanced risk for severe thunderstorms.
Severe thunderstorm risk tomorrow and tomorrow night.
Map showing the Day 2 Excessive Rainfall Outlook for the U.S. Valid from August 2, 2025, with color-coded risk areas indicating the potential for rainfall exceeding flash flood guidance.
Forecast map showing wind gusts across the United States for the afternoon of tomorrow, with color-coded wind speed indicators and major roadways outlined in red.

National Weather Map for the Day after Tomorrow

Weather map showing severe thunderstorm warnings, flash flood risks, and weather fronts across the United States for August 3, 2025.
National weather map for tomorrow.

Three-day Summaries

National precipitation forecast map showing varying rainfall amounts across the United States, with color-coded indications of precipitation levels in inches.
Total rainfall amounts for the next three days
Map showing the National Snowfall Forecast for the United States through August 4, 2025, indicating expected snowfall amounts in inches across various regions.
Total snowfall amounts for the next three days
U.S. map showing the National Ice Accumulation Forecast with various color-coded bands indicating ice accumulation levels through August 3, 2025.
Freezing rain (ice) accumulations for the next three days.

Day 3 – Day 7 U.S. Significant Weather Outlook

U.S. Hazard Outlook map indicating areas affected by hazardous heat and heavy rain, valid from August 3 to August 7, showing regions in red for hazardous heat and green for heavy rain.
Updated each weekday afternoon.
See all the weather graphics (Free – no signup needed!)

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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