Grand Canyon Rainbows

A double rainbow with supernumaries appears above Grand Canyon.

With a weak short-wave trough and residual monsoon moisture moving across Arizona there were possibilities that this would be a “monsoon transition” event. The vertical wind shear was in place but instability was marginal. The end result was a general lack of supercells—but that didn’t mean that the convection wasn’t interesting.

Small rainbow segment over Unkar Delta in Grand Canyon.
Small rainbow segment over Unkar Delta in Grand Canyon.

Multiple waves of thunderstorms moved across Grand Canyon with the earliest storms appearing before noon. With each wave, there was rain with some lightning followed by clearing and even some rainbows.

A band of heavy rain moves across Grand Canyon.
A band of heavy rain moves across Grand Canyon.
Rain approaches Lipan Point.
Rain approaches Lipan Point.

The first rainbow occurred while the sun was high overhead resulting in the rainbow appearing almost directly below in the canyon. This rainbow did not have brilliant colors but being able to see a rainbow over the Unkar Delta was interesting.

A double rainbow with supernumaries appears above Grand Canyon.
A double rainbow with supernumaries appears above Grand Canyon.
A closer look at the rainbow inside Grand Canyon.
A closer look at the rainbow inside Grand Canyon.

More showers…more rainbows. That was how the afternoon played out.

Clouds hug the rim of Grand Canyon.
Clouds hug the rim of Grand Canyon.

Late in the day I relocated to Yavapai Point for sunset colors and hoped for another rainbow. A partial rainbow appeared over the South Rim—but the arch did not continue up and over across the canyon.

A rainbow segment appears just before sunset at Grand Canyon.
A rainbow segment appears just before sunset at Grand Canyon.

A fun day.

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