Worst Pre-Season Conditions in Forty Years of Measurement

The western fire corridor enters 2026 under the worst pre-season conditions in the modern measurement record. Sixty-four percent of SNOTEL stations,1,012 of 1,570,recorded all-time low snowpack on April 1. Eight states set new record lows; Arizona, Colorado, Idaho, Nevada, New Mexico, Oregon, Utah, and Wyoming all hit SNOTEL-era lows simultaneously. As of May 18, snowpack has collapsed across the corridor. Washington, Oregon, Idaho, and Montana all read 0.0" median SWE. Snow remains at only 10% of Oregon SNOTEL stations and 40% of Washington’s. Melt-out arrived weeks ahead of schedule across the West, with many stations recording their earliest snow-free date on record. Oregon has 62 of 73 water supply forecast points at or near historic lows.

January through March was the driest on record for the continental United States. More than 60% of the U.S. is in drought. 59 active fire incidents burn across the western corridor totaling 32,026 acres,including a 10,000+ acre fire on Santa Rosa Island in Channel Islands National Park that destroyed historic structures and forced helicopter evacuation of 11 NPS employees. Nationally, 1.88 million acres have burned across 25,000 fires,exceeding the 10-year annual average before fire season has officially begun. AccuWeather forecasts 5.5–8 million acres for the full year.

El Niño Watch in effect. Probability reaches 80% by June–August, 88–94% by fall, with a 25% chance of a Super El Niño (≥+2.0°C). Lake Powell is forecast to receive only 13% of usual inflows,hydropower generation could halt by September. USFS capacity degraded: ~6,000 employees lost, 57 research facilities closing, proposed FY2026 budget slashes staffing by 26%. Over 12,000 PurpleAir sensors monitoring western air quality.