KCS 4604 finds a break in the clouds with a rainbow in the distance, as it heads south on Colorado's Joint Line at Larkspur, CO. July 23, 2019.

The turbulent skies begin to form the massive thunderstorms which will pummel the afternoon rail traffic with flooding rain and pounding hail.

Severe thunderstorms have blanketed the Colorado Front Range, and BNSF 5411 briefly catches a spot of sun as it outruns the hard rain and hail on its way to Larkspur.

Rear DPU's BNSF 9256, 9141 and 9834 shove a coal load south between Larkspur and Greenland, CO, on Colorado's Joint Line. Mar 16, 2019.

Rear DPU's BNSF 9256, 9141 and 9834 shove a coal load south over the old ATSF bridge at Larkspur, CO, on Colorado's Joint Line. Mar 16, 2019.

Rear DPU's BNSF 9256, 9141 and 9834 shove a coal load south over the old ATSF bridge at Larkspur, CO, on Colorado's Joint Line. Mar 16, 2019.

BNSF 6077 leads a soutbhound coal load over the old ATSF bridge at Larkspur, CO, on March 16, 2019.

BNSF 9116 leads a soutbound coal load over East Plum Creek, on the old ATSF bridge, at Larkspur, CO. April 25, 2019.

A BNSF coal train heads past the entrance to the Spruce Mountain open trail and a local ranch.

Heading south on the Joint Line on August 15, 2017, is BNSF Railway coal train C-SCMCRD0-17. This train, with AC4400CW 5665 and ES44AC 6158 up front and AC4400CW 5678 and SD70ACe 8584 on the rear... (more)

Rear DPU BNSF 8214 on the rear of a northbound unit tank train, at Larkspur, CO, June 10, 2019.

BNSF 4349 leads a northbound tank train at Larkspur, CO, on Colorado's Joint Line while two great blue herons stand in the foreground pond. June 12, 2019.

BNSF 9284 (SD70ACe) runs the high ridge which will take it into the north side of Larkspur, Colorado.

BNSF 789 leads a southbound merchandise train at Larkspur, CO. Nov 23, 2003.

UP 7230 leads a southbound merchandise train at Larkspur, CO, on Nov 23, 2003.