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User / Bill Bowman
Bill Bowman / 1,217 items

N 63 B 676 C 16 E Jul 26, 2019 F Aug 24, 2019
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Clouds build up over Kiowa (l) and Navajo (r) Peaks with the combination of daily heat and monsoonal moisture. The uppermost part of the valley has a small residual (Little Ice Age) glacier (Arikaree glacier), though a mere 14,000 years ago there was a sizable glacier in the valley that would have been visible from this view point on Niwot Ridge.

Tags:   Indian Peaks Niwot Ridge Kiowa Peak Navajo Peak cumulus clouds Colorado southern Rocky Mountains Front Range rule of thirds what rule of thirds?

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An early evening thunderstorm moves over Longmont Colorado. Oddly several planes were flying through the storm, resembling small meteor streaks here. This storm occurred a week before my previous lightning/ t-storm post.

Tags:   lightning thunderstorm Colorado Longmont Colorado Grassy Top Peak to Peak highway

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A storm clears off the ridges that divide the river systems draining into the Pacific (to the left) and to the Atlantic (right)- here the Colorado River and South Platte Rivers. In the center the summit knob of Navajo Peak (13,415 ft / 4089 m) catches a bit of sun, with Apache Peak (13,447 ft / 4099 m) just behind it, and Arikaree Peak (13,156 ft / 4010 m) to the right. The loose rock intermixed with snow in the lower part of the frame are moraines (piles of rock pushed up by glaciers) from the Little Ice Age (1300-1850). The rocks are billion year old metamorphic gneiss and schists, with a few intrusions visible, particularly in some of the higher ridges (e.g. the white stripes in the first ridge up from the bottom).

Tags:   Continental Divide Indian Peaks Navajo Peak Arikaree Peak Apache Peak Mount George North Arapaho Peak Boulder Creek drainage clearing storm

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A severe thunderstorm bears down on Fredrick Colorado, dropping golf-ball sized hail, high winds, and frequent lightning- it looked like a strobe in the sky. The near-full moon illuminates the slopes of Grassy Top off to the left, and in the distance the lights of Longmont shine. This was a fabulous and frightening storm to watch, building up with ferocity I’ve never seen before. It was triggered by “outflow” of severe storms (similar to a cold front) earlier in the day on the Colorado-Kansas-Nebraska borders. As if the storm wasn’t enough there were a few Perseid meteors streaming overhead as well.

Tags:   thunderstorm Colorado severe thunderstorm lightning cumulonimbus Grassy Top

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Nothing provides cheer like a yellow daisy (unless it is non-descript and you have to identify it to species ;-). This is "blanketflower/ common gaillardia," (Gaillardia aristata), a common species in meadows in the montane zone (1500- 3000 m, 5000-10,000 ft). In some populations the inside portion of the petals is orange, similar to the ornamental Gaillardias.

Tags:   Gaillardia aristata blanketflower common gaillardia Grassy Top montane zone Colorado southern Rocky Mountains


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