spread by high winds near the East Portal of the Moffat Tunnel. More than 700 men helped to fight the fire that consumed at least 800 acres near Tolland. On Wednesday, August 4, 2010, a plane crash on the east side of the pass caused a small wildfire. Unknown cause On Tuesday, July 30, 2019, a small sub-acre fire ignited behind the Lakota subdivision on the lower portions of Rollins Pass; the fire was extinguished by the following evening. Climate Seasons Winter Arctic conditions are prevalent during the winter, with sudden blizzards, high winds, and deep snowpack. High country overnight trips require gear suitable for or below. The subalpine region does not begin to experience spring-like conditions until June. Wildflowers bloom from late June to early August. Summer Due to high-elevation above timberline in a backcountry setting, there is neither lightning protection nor lightning mitigation from sudden thunderstorms resulting in a high-risk, extremely dangerous situation for visitors. The most suitable—but not best—refuge available from electrical storms would be in a metal-topped vehicle as it would serve as a mobile Faraday cage. Weather equipment and historical records Historical During the railroad era, a United States Weather Bureau observation station was mounted atop the large water tank at the townsite of Corona. Records from this station show "the prevailing wind direction was west, the lowest temperature recorded was (in February 1910), and the most monthly snowfall was in March 1912 with of snow." Newspaper reports mention winds in excess of , including at least one instance of , and temperatures of . Both these temperatures and wind speeds are in line with today's conditions in Colorado's high mountains. Present day A small, solar-powered weather station exists on the west side of Rollins Pass, located above Ptarmigan Point. Atmospheric pressure While temperature, humidity, and other factors influence atmospheric pressure, the atmospheric pressure on the summit measures roughly ; while a standard atmospheric pressure measured at sea level is . At this pressure, many people, especially out-of-town visitors from lower elevations, can suffer from rapid dehydration and altitude sickness, also known as acute mountain sickness. Acute mountain sickness can progress to high-altitude pulmonary edema (HAPE) or high-altitude cerebral edema (HACE), both of which are potentially fatal. Historically, newspaper reports wrote of both visitors and railroad workers experiencing heart attacks and pneumonia at the summit of Rollins Pass as well as severe frostbite, including in