AHX Weekly Market Intelligence: Diesel Prices Ease Nationwide as Great Lakes Flooding Becomes the Week's Top Transport Risk

Diesel prices ease everywhere, but the middle of the country is still running hot

Every one of the 10 regions Auto Hauler Exchange tracks posted a week-over-week diesel price decline this week, snapping a three-week run-up that had pushed prices sharply higher from mid-July into early August. Zoom out to the monthly and yearly view, though, and diesel remains 34% to 48% more expensive than a year ago in every region, with the Great Lakes, Central Plains, Upper Midwest, and Mountain corridors still climbing double digits month-over-month. Layer on a genuine flooding emergency across Indiana, Kentucky, Michigan, and Ohio, plus wildfire-season conditions tightening capacity out west, and this week is a study in contrasts: relief on fuel, real risk on weather and capacity.

Diesel Prices by Region

National average (calculated from regional vs.-national data): approximately $5.256/gal. Not a single region saw a weekly increase this week, and all 10 moved down together — the first time that's happened since prices spiked sharply in mid-July. The largest relief showed up in the Mid-Atlantic, down 2.59% week-over-week, with the Southeast close behind at -2.24%. The West Coast remains the only region running more than 10% above the national average, at +15.5%, though it has eased roughly $0.45/gal from its mid-May high near $6.52/gal.

Weather Alert Summary

The Great Lakes corridor is the transport risk to watch this week: 30 severe alerts, more than double the next-closest region (Central Plains, 13), with active Flash Flood Warnings in Northern Indiana and a Flood Watch across the region. The Mountain West's wildfire season is the second story, with 6 Red Flag Warnings and 18 Air Quality Alerts across AZ/CO/ID/NV/NM/UT/WY.

Corridor Outlook

What we're seeing on the AHX platform

It remains a carrier's market, with carriers selecting the best-priced, best-positioned shipments first. Mountain inbound capacity is tightening fastest in the network as wildfire season pulls carriers toward those markets. Central Plains outbound capacity is loosening, a good window for freight moving out of that corridor. Ohio, Michigan, Florida, California, and Pennsylvania are the strongest pickup markets right now; Colorado, Missouri, Arizona, Ohio, and Iowa lead on delivery. The AHX Market Estimate Tool reflects these regional dynamics in real time.

What dealers should do this week

1. Don't budget for a fuel surcharge this week — it's a genuine relief week across all 10 regions, a welcome break if you'd been bracing for another increase.
2. Build in schedule buffer on Great Lakes shipments given active flash flooding.
3. Price competitively on Mountain-region freight now, before wildfire conditions compress capacity further.
4. Take advantage of loosening Central Plains capacity for outbound freight.
5. Budget for higher linehaul cost on West Coast lanes, still the priciest corridor in the country.
6. Build minor schedule buffer on shipments through Central Plains, South Central, Southeast, and Mid-Atlantic — heat advisories are widespread across these corridors this week and can add time to transit.
7. Plan around CVSA Brake Safety Week (August 23–29) if you're scheduling shipments in that window — a nationwide brake-inspection blitz roughly two weeks out can temporarily pull carriers out of service, so it's worth building a little flexibility into timing.

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Data attribution: EIA Gasoline & Diesel Fuel Update, survey week ending August 10, 2026. NOAA/NWS active weather alerts as of August 11, 2026. AHX platform market data as of August 11, 2026.