Massive Hail, Supercell Fury Targets SE Wyoming into Northern Colorado — SevereWX

Thunderstorms are firing up along the northern Colorado Front Range and southeast Wyoming this afternoon, with a high likelihood of watch issuance within the next couple of hours.

Satellite imagery shows deepening cumulus clouds building rapidly near Castle Rock, Cheyenne, and the Laramie Mountains, fueled by orographic lift and daytime heating in a moist air mass with dewpoints in the upper 50s to low 60s. While some early initiation attempts have fizzled due to lingering inhibition, continued surface heating into the upper 70s/low 80s should overcome it soon, sparking robust convection along the Front Range or a subtle cold frontal boundary stretching into far western Nebraska.

Once underway, these storms are primed to evolve into splitting supercells in an environment boasting 50-60 kt effective shear and elongated hodographs. The primary threats: very large hail (2.75-4.25 inches) capable of smashing vehicles and windows, severe gusts to 80 mph, and a lower-end tornado risk from any right-moving supercell thanks to southeasterly low-level flow.

SPC Mesoscale Discussion 1295 highlights an 80% chance of watch issuance as convection sustains and intensifies through late afternoon (valid until around 4 PM Moderate). Populations along the I-25 corridor from Fort Collins southward should prepare.

Stay alert: Monitor radar closely, have a severe weather plan ready, secure outdoor items, and seek shelter in interior rooms away from windows if storms approach. Check updates from local NWS offices (BOU, PUB, CYS). #SevereWX #FrontRangeStorms