<div id="readability-page-1"><div><p><span>(Platts)--15Dec2025/1242 pm EST/1742 GMT     Wholesale power prices continued to decline in the West as the Intercontinental Exchange saw bearish activity Dec. 15 amid weaker demand, lower natural gas prices.          PRICES     On the on-peak markets, prices fell by around $2.25 on average from their previous price for delivery Dec. 16 with California Independent System Operator's SP15 decreasing the most, by about $6 to $33/MWh.     In the Southwest, Mona and Palo Verde saw $2.25 and $1.75 drops to around $22.75/MWh and 24.75/MWh, respectively.     The off-peak markets saw sharper declines, dropping $2.75 on average, with Northwest's California-Oregon Border and Mid-Columbia hubs dropping around $4.5 and $2.25 to $22.50/MWh and $18.75/MWh, respectively. Meanwhile, Southwest's Mead fell $3.50 to $26/MWh.          MARKET FUNDAMENTALS     In line with price decreases, CAISO's renewables supply was expected to rise over the day, with wind and solar rising 13.22% to 93.27 GW Dec. 17, according to CAISO's forecasts.     CAISO's peakload demand was expected to drop by around 468 MW, or 1.61% to 28.63 GW Dec. 16, according to the grid operator.     Temperatures across the region were forecast to remain around 9 F above their five-day norm, according to CustomWeather.     In the Northwest, Seattle expected highs of 52 F (11 C) Dec. 16, 5 F above its five-day norm. Meanwhile, Southwest's Phoenix and CAISO's Los Angeles expected 78 F and 72 F, 12 F and 5 F above their norm, respectively.     In gas prices, SoCalGas city-gates saw a 23 cent decrease to around $3.56/MMBtu for day-ahead delivery, while PG&amp;E fell around 19 cents to 3.35/MMBtu.     Platts is part of S&amp;P Global Energy.     — Mauricio Avila, mauricio.avila@spglobal.com-- Edited by Giselle Rodriguez, newsdesk@spglobal.com--Platts Electricity Alert--</span></p></div></div>

<p>Wholesale power prices in the US West continue to decline due to weaker demand and lower natural gas prices. On-peak market prices fell by an average of $2.25, with significant drops in California and the Southwest. Off-peak markets saw sharper declines. CAISO forecasts increased renewable supply and decreased peakload demand. Temperatures remain above normal, affecting energy consumption. Gas prices also decreased, with SoCalGas and PG&E city-gates seeing reductions. Platts is part of S&P Global Energy.</p>

PLATTS: 400--US Western power prices continue to drop amid high temperatures - 15Dec25