Hurricane Isaias Cuts Gulf Oil Output and Threatens Refineries

Hurricane Isaias is threatening energy infrastructure and coastal communities along the northern Gulf Coast as the Category 3 storm approaches Mississippi, Alabama and the Florida Panhandle, with landfall expected late Friday or early Saturday, October 9-10. The hurricane has disrupted offshore oil production and could affect two refineries, while dangerous winds, storm surge and heavy rainfall threaten coastal areas.

Oil companies had shut in approximately 1.3 million barrels per day of crude production in the Gulf of Mexico as of Thursday, representing about 63% of total U.S. output in the region, according to the Bureau of Safety and Environmental Enforcement. The storm's potential impact on refineries comes as international fuel markets face existing supply constraints.

The National Hurricane Center reported maximum sustained winds of 120 mph in its 7 a.m. Friday advisory. Isaias was moving north-northeast at 15 mph, located 245 miles south of Pensacola, with a minimum central pressure of 959 millibars. Although stronger upper-level winds could weaken the hurricane before landfall, its wind field could expand.

The storm's projected path appeared to spare the concentrated refining corridor around New Orleans and Baton Rouge in southern Louisiana. However, Chevron's refinery in Pascagoula, Mississippi, and Vertex Energy's refinery in Saraland, Alabama, remain potentially exposed to the storm.

Andy Lipow, president of Lipow Oil Associates, said the two facilities have a combined production capacity of 466,000 barrels per day, equivalent to 2.4% of U.S. refining capacity. Chevron spokesperson Ross Allen said the Pascagoula refinery remained operational, while Vertex officials had not immediately provided a comment on the Saraland facility.

Gulf Coast refineries are operating at 95% of capacity, leaving limited room to compensate for disruptions, Lipow said. He also warned that maritime transportation could face delays affecting both incoming crude oil and outgoing refined products.

"Tankers will be delayed delivering crude oil to the refineries while other tankers are delayed loading gasoline, jet fuel and diesel," said Lipow, the president of Lipow Oil Associates.

He added that transportation delays could affect fuel deliveries to Florida. The potential disruption comes as diesel prices have climbed amid damage to refining capacity associated with conflicts in Eastern Europe and the Middle East. Ukraine's attacks on Russian refineries prompted Moscow to prohibit diesel exports, while Iran and its Houthi allies have also attacked refineries in the Middle East.

U.S. refiners have increased diesel exports to capitalize on wider profit margins, particularly to Europe. Kevin Book, managing director at ClearView Energy Partners, told CNBC's Squawk Box on Thursday that previous Gulf refinery outages had caused fuel prices to rise even as crude prices declined, because affected facilities purchased less crude and produced less fuel for consumers.

Beyond the energy sector, Isaias poses significant flooding and wind risks. According to WDSU, storm surge warnings and tropical storm warnings remain in effect for parts of southeastern Louisiana, while hurricane warnings cover coastal areas extending from Ocean Springs, Mississippi, to the Bay-Gulf County line in Florida.

Forecast storm surge could reach 3-5 feet from the mouth of the Mississippi River to Ocean Springs, 5-7 feet from Ocean Springs to Indian Pass, Florida, including Mobile Bay, and 4-6 feet from Indian Pass to the Steinhatchee River in Florida. These estimates represent potential water levels above normally dry ground in affected areas if peak surge coincides with high tide.

Southern Mississippi, southern Alabama and the Florida Panhandle face the threat of damaging hurricane-force winds, with possible power outages lasting several days or longer in the hardest-hit areas. In exposed coastal communities, wind gusts could reach 45-65 mph, while inland portions of southeastern Louisiana could experience gusts of 25-40 mph.

The heaviest rainfall is expected across southern Alabama, the Florida Panhandle and parts of southwestern Georgia, where totals could reach 4-8 inches, with isolated amounts as high as 15 inches, according to WDSU. These conditions could trigger flash flooding, street flooding and river flooding, while isolated tornadoes are possible Friday night along coastal Alabama, the Florida Panhandle and far southwestern Georgia.