SIGNAL · Demand shock · 2026-10-07

Grain-drying propane in the western Corn Belt: a late, wet Iowa harvest meets record US propane exports and lower Midwest stocks, autumn 2026

Accepted

On 7 October 2026 RFD-TV reported the Propane Education and Research Council saying propane supply is great for the grain-drying season, naming one risk: a very wet corn crop dried across many areas at once against early cold. USDA NASS put Iowa corn 66 % harvested on 1 November 2026 against a 2021-2025 average of 79 % (Nebraska 66 % against 75 %), after an Iowa September with 7.83 inches of rain (NOAA NCEI). EIA weekly data show US propane exports averaging 2,015 thousand barrels per day over weeks 1-44 of 2026, above every year since 2019, and Midwest propane stocks at 17.7 million barrels on 30 October, against 20.8 million a year earlier.

Geography: Iowa (corn harvest and grain drying) / Nebraska (corn harvest and grain drying) / Midwest (PADD 2) propane stocks and residential prices / Mont Belvieu, Texas (propane hub and export supply). The report that started this signal → Edition: A late Iowa corn harvest dries on propane whose price follows the Gulf hub. Dossier: reviewed on 2026-11-04.

Series

Organisations

Universe drawn from: Iowa Institute for Cooperatives — our members (Grain and farm supply co-ops in Iowa and neighbouring states, and regional members (CHS, GROWMARK, Energy Transfer as associate); organisation names only were taken, contact details discarded.); EIA — US propane exports by destination (annual) (Customs-based destinations; Japan, China, Mexico, South Korea, Indonesia, the Netherlands and India lead in 2025. Used to choose overseas buyers.); Argus — New US LPG terminal project sends strong supply signal (18 Feb 2025) (Names the Gulf Coast LPG export terminals and owners: Enterprise, Targa, Phillips 66, Energy Transfer, ONEOK and MPLX.); ICIS via Hellenic Shipping News — New US LPG export capacity (1 Aug 2026) (Gulf Coast LPG export expansions to 2028 and the Asian demand shift after the Hormuz closure.); Argus — India begins receiving first US LPG term supplies; India buys spot US LPG (Indian buyers (IOC, BPCL, HPCL), sellers (Phillips 66, Chevron, TotalEnergies) and carriers in 2026.); Iowa State University Extension — Wet corn and the propane shortage (2019) (Mechanism reference: farm and elevator dryers on propane; used to look for elevators, dryer makers and alternative fuels.). Each organisation below carries its own verbatim evidence.

Hypotheses

OPEN · confidence medium · horizon 2026-12-02. If Midwest (PADD 2) propane stocks for the week ending 20 November 2026 are above 16,000 thousand barrels, a draw from 30 October at or below 2024's 1,660 over the same weeks, every weekly Midwest residential propane price surveyed in November 2026 stays between 2.25 and 2.42 USD a gallon, because the drying gallons arrive on the usual delivery cadence and the price follows the national hub, as the two comparable autumns and the CPC outlook of 31 October for a warmer-than-normal November support. Indicators: PADD 2 propane stocks, week ending 20 November 2026 (EIA weekly, released 25 November); Midwest residential propane price, weekly Monday surveys of November 2026, upper bound (EIA); Midwest residential propane price, weekly Monday surveys of November 2026, lower bound (EIA).

OPEN · confidence low · horizon 2026-12-31. If Midwest (PADD 2) propane stocks for the week ending 20 November 2026 are at or below 16,000 thousand barrels, a draw from 30 October larger than 2024's 1,660 that needs weekly draws above any November week in the series, every weekly Midwest residential propane price surveyed in December 2026 is between 2.35 and 2.62 USD a gallon, the window's high of March 2022, because drying and heating fills then draw on Gulf barrels bought at hub parity plus freight while exports hold their contracted pace. Indicators: PADD 2 propane stocks, week ending 20 November 2026 (EIA weekly, released 25 November); Midwest residential propane price, weekly Monday surveys of December 2026, lower bound (EIA); Midwest residential propane price, weekly Monday surveys of December 2026, upper bound (EIA).

OPEN · confidence medium · horizon 2026-12-02. If the November 2026 price rise is carried by the national hub rather than by Iowa drying, then in every weekly survey of November 2026 the Midwest residential propane price's change from a year earlier exceeds the US average's by less than 0.10 USD a gallon, and the Iowa price stays below the Midwest average; on 2 November the Midwest was up 0.358 against 0.375 for the US, and Iowa was 0.44 below the Midwest. Indicators: Midwest minus US average residential propane price change from a year earlier, weekly surveys of November 2026, USD a gallon (EIA Heating Oil and Propane Update); Midwest residential propane price, weekly surveys of November 2026, the reference for the Iowa comparison (EIA); Iowa residential propane price, weekly surveys of November 2026, to stay below the Midwest price (EIA).

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Sources and reuse

USDA National Agricultural Statistics Service — U.S. federal government work (17 U.S.C. §105). NASS Citation Request page: "Public domain information on the National Agricultural Statistics Service (NASS) Web pages may be freely downloaded and reproduced. However, it is requested that in any subsequent use of this work, USDA-NASS be given appropriate acknowledgment." Crop Progress reports are read from the USDA ESMIS archive (Cornell) that NASS publishes to. (policy, checked 2026-11-04)

NOAA National Centers for Environmental Information — U.S. federal government work (17 U.S.C. §105). The nClimDiv dataset record behind Climate at a Glance states as its only use constraints a citation ("Cite as: Vose, Russell S.; ... (2014): NOAA Monthly U.S. Climate Divisional Database (NClimDiv) ... doi:10.7289/V5M32STR") and a liability disclaimer ("NOAA and NCEI make no warranty..."); no restriction on reuse. (policy, checked 2026-11-04)

U.S. Energy Information Administration — "U.S. government publications are in the public domain and are not subject to copyright protection." Credit requested: "Source: U.S. Energy Information Administration (<date>)". (policy, checked 2026-11-01)