Morning Fog at Mormon Lake

A few days of tropical moisture—remnants of Tropical Depression Nora—brought widespread rainfall to much of northern Arizona. As the moisture was replaced by drier air in the middle- and upper-levels but was unchanged in the near-surface layer, we were left with a situation in which fog might form in the early morning hours.

 

So, up before dawn to drive out to Mormon Lake and the surrounding basin. And there was fog—at least in one corner of the basin. Here is a 30-minute time lapse compressed down to 17 seconds showing the movement of the fog as it sloshes back and forth.

Sunrise through morning fog.
Sunrise through morning fog.

As this was taking place, the sun rose through a shallow layer of fog.

Sunset at Grand Canyon.
Sunset at Grand Canyon.

Bonus: on the previous evening the sun was setting through layers of smoke from the western wildfires.

Edit: updated image.

Thunderstorms and Lightning

The North American Monsoon has been sputtering—for lack of a better term—the past week or two. We get a few days of storms followed by a hot and dry period. Finally, however, moisture is beginning to increase and we are seeing more storms. I have tried several times this year to get great photographs of storms and lightning but my success rate has been pretty low.

Here are a few photographs from the past week.

Clouds develop across the whole sky in Sedona.
Clouds develop across the whole sky in Sedona.
An outflow boundary arrives and thunderstorms develop within a few minutes.
An outflow boundary arrives and thunderstorms develop within a few minutes.
A distant thunderstorm seen from Wupatki National Monument.
A distant thunderstorm seen from Wupatki National Monument.
Mid-afternoon lightning near Mormon Lake.
Mid-afternoon lightning near Mormon Lake.

And, finally we have a time lapse of the same storm that produced the lightning above. The video is 200x real time; from the motion it can be seen that the storm has some slow rotation. This storm moved off the higher terrain and became severe as it neared the Camp Verde area.

The weather models have been consistent with forecasting a significant increase in storm activity next week.

Wave Clouds over the San Francisco Peaks

New Year’s Day brought some interesting wave clouds to the San Francisco Peaks. I headed west to Brannigan Park to get both good views of the clouds and sunset colors on the peaks. In addition, I shot time-lapse video that shows the amazing motion of the wave cloud above the peaks and the cap cloud that obscures the summit.

Clouds over the San Francisco Peaks.
Clouds over the San Francisco Peaks.
Wave clouds above the San Francisco Peaks.
Wave clouds above the San Francisco Peaks.

Time-lapse video of wave clouds and cap clouds.

And then there were these thin, wispy clouds catching the light of the setting sun.
And then there were these thin, wispy clouds catching the light of the setting sun.

 

Dramatic lenticular clouds above the Kachina Peaks

A strong cold front and upper-level low was rapidly approaching Arizona. Ahead of this weather disturbance these spectacular lenticular clouds developed over the Kachina Peaks during the night of 03/06/2012. As the sun rose in the morning the clouds were nicely illuminated. About an hour after sunrise atmospheric conditions began to change and the wave clouds became more diffuse and detached from the peaks and drifted downstream.

Dramatic wave clouds above the Kachina Peaks.
Dramatic wave clouds above the Kachina Peaks.

Here is a video clip showing the wave clouds. The original clip is 40m40s long. The clip shown here has been sped up by a factor of 200x so the time lapse now occurs in around 12 seconds.

Dance of the clouds

The weather across much of the country has been very dramatic the past few days with snow storms, ice storms, strong winds, and brutal cold. Across Arizona we experienced exceptionally cold weather as the Arctic air mass settled in across the area. Strong northeast winds at the surface and aloft helped to drive the cold air across the Rocky Mountain barrier and deep into the southwest.

The northeast winds also created some fantastic wave clouds over the San Francisco Peaks, located to the north of Flagstaff. Normally, strong southwest winds roll across the Peaks and the best wave clouds are located to the northeast but this wind reversal resulted in a reversal of the wave clouds as well.

Delicate wave clouds dance across the San Francisco Peaks.
Delicate wave clouds dance across the San Francisco Peaks.

Video here.

Even more interesting were the clouds that were forming just below the tops of the peaks. Strong winds from the northeast drove cold air into the Inner Basin on the east side then up and over the top of the peaks. As the air ascended thin wispy clouds would form. Just as quicky the air descended on the southwest slopes and the clouds evaporated.

The rapidly changing clouds and detailed structure were fascinating to watch. A time-lapse movie clearly shows this incredible dance of the clouds as it moves across the Peaks.