Potential record-setting hurricane season is forecast and may weaken energy demand, prices

The article notes that the National Oceanic and Atmospheric Administration on May 23 projected the most tropical cyclones ever in its early hurricane season forecast, and such storms could weaken energy demand and prices in landfall areas during what may be an otherwise warmer-than-normal summer. In particular, NOAA made the following forecast:

• 17-25 named storms, up from 14.7 for 1991-2023
• Eight to 13 hurricanes, up from 7.2 for 1991-2023
• Four to seven major hurricanes, up from 3.2 for 1991-2023.

At the high end of the forecast, the season could equal 2020’s record seven major hurricanes and approach 2020’s record 30 named storms and 2005’s record 15 hurricanes.

“As one of the strongest El Nino ever observed nears its end, NOAA scientists predict a quick transition to La Nina conditions, which are conducive to Atlantic hurricane activity because La Nina tends to lessen wind shear in the tropics,” NOAA said. “At the same time, abundant oceanic heat content in the tropical Atlantic Ocean and Caribbean Sea creates more energy to fuel storm development.”

Energy market impacts

Tropical cyclones making landfall 2021 through 2023 cut peakloads at affected grids an average of 18%, power burns an average of 17%, and power prices – excluding the Electric Reliability Council of Texas South Hub’s extreme case in 2023 – an average of 38%.

ERCOT had one of its hottest summers on record in 2023, so day-ahead on-peak locational marginal prices at the South Hub averaged almost $795/MWh on Aug. 15, the Tuesday before Tropical Storm Harold hit South Texas on Tuesday, Aug. 22, when prices averaged less than $60/MWh.

The change was drastic, inasmuch as ERCOT load fell just 1.5% on the week, and natural gas power burn actually increased 10.7%. South Texas has a large wind generation fleet, which may have been taken offline during the storm due to transmission constraints or grid reliability concerns.

Grant said hurricanes “can be a mixed bag for supply and demand” for natural gas. The production impact “used to be the typical thinking for hurricanes,” as they would diminish offshore production as platforms shut down and evacuate. “However, as offshore gas production has fallen and moved more onshore, these impacts have become more muted. A mild hurricane likely won’t impact onshore Gulf Coast production all that much.” In contrast, hurricanes can have a big impact on power burn and shut-in LNG exports, he said.

The National Weather Service on May 16 forecast enhanced chances – 40% to 60% – for above-normal temperatures for June, July and August across the US South Atlantic and Gulf Coast. CustomWeather on May 22 forecast temperatures to be zero to two degrees above normal across the region in June.

Grant adds: “Power outages naturally reduce power burn demand, which is a significant source of demand in Texas and the Southeast. LNG facilities, which are situated primarily along the Texas and Louisiana Gulf Coast, will usually halt exports during hurricanes due to rough seas and an inability to bring in tankers to load. These shut-ins can last 3-5 days or more depending on the severity of the storm, and a single LNG facility shutting in can result in 2+ Bcf/d of demand going offline.”

Risk management

As of May 22, day-weighted average on-peak power forwards for the 2024 hurricane season, June 1 through Nov. 30, were less than day-ahead on-peak prices at relevant hub in ERCOT, but had premiums in comparison with day-ahead on-peak power in the Southeast and at the Midcontinent Independent System Operator’s Louisiana Hub.

Gary said the location and strength of such storms affect the risk of lost load the most. “The forward markets, even at a near coastal hub months before the hurricane season begins, do not have any information or data that indicates the timing or severity of hurricane landfall, so the incorporation of a long-term forecast like this is interesting data to the market, but not likely a key component of forward price.”

Another risk to consider is the effect on solar installations, which have grown substantially over the past few years along the Gulf Coast, particularly in Florida and Texas.

But Derek said that storm tracks from the more active seasons of 2004 and 2005 show the grid and solar installations are distributed widely over the peninsula, such that “any one hurricane, or even several, are not going to make the sort of direct hits required to cause extensive damage. And, to the extent those installations have associated storage and/or inverters capable of operating islanded from the grid, any installations that are not damaged are useful resources for consumers and/or the utility.”