The 30-hour period beginning around 3 p.m. on this day offered two extraordinary storm-chase adventures in the same corridor east-northeast of the Denver metro area and south of I-76—including the next day’s Prospect Valley tornado. This was the fifth of six late-afternoon to evening supercells, and perhaps the most consistently spectacular, in a protracted train of storms rolling out of the Boulder/Longmont area, either along or obliquely across I-76. The fascinating and captivating supercell, presenting itself as a tilted layer cake spitting sparks into the “blue hour” of twilight, would continue to electrify and swirl across the evening sky in photogenic ways.
12 SSW Wiggins CO (18 Jun 18) Looking W
40.0736, -104.1694A Supercell’s Evening Pastels
The 30-hour period beginning around 3 p.m. on this day offered two extraordinary storm-chase adventures in the same corridor east-northeast of the Denver metro area and south of I-76—including the next day’s Prospect Valley tornado. This was the fifth of six late-afternoon to evening supercells, and perhaps the most consistently spectacular, in a protracted train of storms rolling out of the Boulder/Longmont area, either along or obliquely across I-76. The fascinating and captivating supercell, presenting itself as a tilted layer cake spitting sparks into the “blue hour” of twilight, would continue to electrify and swirl across the evening sky in photogenic ways.
12 SSW Wiggins CO (18 Jun 18) Looking W
40.0736, -104.1694