In the wake of a departing low pressure system I expected that there might be areas of dense fog in the morning. I awoke well before sunrise to look at satellite images to see if fog was developing. And, yes, there were some hints that fog was present. Good!
I left the house around 6 a.m. and headed east on Lake Mary Road. A few miles outside of town I ran into fog. Visibility dropped quickly to around 1/4 mile. Drive carefully!
My destination was the Mormon Lake Overlook. I had some success last winter at this site with a similar fog situation. As I approached the overlook the fog lifted becoming a low cloud deck above me. Hmmmm….not quite what I wanted. Ahead, I could see the edge of the cloud/fog. As I made the final approach to the overlook the road gained a bit of elevation and, suddenly, I was above the cloud/fog deck. Wonderful.
The sun had not yet risen but it was light enough to see that there was a shallow layer of fog covering the Mormon Lake basin.Â Moments later the sun began to rise through the dense fog.
As the fog began to dissipate over Mormon Lake, I headed towards Anderson Mesa Station (home to several telescopes) because it is high enough to be above the fog. But first, along the way, the road dropped down into the fog and I saw this fog bow.
Finally, atop Anderson Mesa I once again was above the fog and able to photograph a Gloryâ€”this time projected onto trees with autumn colors.
Finally, here is a time-lapse of the fog over Mormon Lake that includes the Glory and the right-hand side of the fog bow.
Edit: Replaced GOES-16 visibile image with IR image.
A previous post displayed photographs of storms and weather that occurred during July of this year’s North American Monsoon. Here are photographs from August (plus the first day of September).
Cumulus and Cumulonimbus
A search for wildflowers and thunderstorms brought me to Rogers Lake west of Flagstaff. It’s a lake only ephemerally during springs with heavy snow runoff.Â But it makes a grand place for photographs when a wide-open vista is desired. Earlier convective storms were pushing an outflow boundary southward with new convection developing on the boundary.
There was just enough vertical wind shear on this day to allow some storms to briefly exhibit supercell characteristics and deviate to the right â€”which brought this thunderstorm near the edge of the North Rim of Grand Canyon.
Fog and Smoke
Sometimes the unexpected can be magical. When fog forms in Grand Canyon the visitors may be disappointed but there is the potential for amazing photographs.
I have traveled up to the South Rim of Grand Canyon several times in the past few weeks to get interesting weather and cloud photographs.
Two weeks ago, we spent two nights at the South Rim waiting for a winter storm to arrive and drop some snow on the higher elevations of the canyon. The storm went too far south and Grand Canyon got nothing but some clouds and a bit of fog. Flagstaff, on the other hand, got about 8″ on snowâ€”which we had to clear from our driveway when we returned.
The other goal on that trip was to catch the rising nearly-full moon as it climbed above Cape Royal on the North Rim. That worked out well as the clouds had dissipated by late afternoon. This image was shot as a 12-frame panorama (6 across, 2 rows) resulting in an image of ~200 megapixels. There is a lot of detail in the full-resolution image!
As the sun fell lower in the sky, shadows raced across the canyon bottom while some of the higher towers and buttes remained in the sunâ€”resulting in some interesting lighting and abstract patterns.
Our final morning had some wave clouds forming downwind of the Kaibab Plateau and being lit by the rising sun.
A few days ago we had a widespread rain eventâ€”even though rainfall amounts were not particularly large. Most importantly, measurable rain fell in Winslow. This meant that there was a possibility of fog forming in the Little Colorado River (LCR) Valley and drifting into the eastern reaches of Grand Canyon. I arrived at Lipan Point on the South Rim before sunrise and could see some low-lying fog in the LCR well east of the canyon. As the sun rose and the land began to warm, the fog began to lift and move towards the canyon. Eventually, it reached the Palisades north and east of Desert View Overlook. And, then, it began to spill over the sides evaporating only a short distance below the rim.
The fog soon swept across Desert View Overlook. I headed over to Desert View to shoot photos of Desert View Watchtower in the fogâ€”but the fog was so thick I had to get very close to even see it.
I went back to Grand Canyon again the next morning but there were clouds along with some drizzle and light rain. However, there was a 2â€“3 minute period in which some clouds had a bit of sunlight color. Yesâ€”that’s a pretty long round-trip drive for 2â€“3 minutes of good photography. Nobody ever said it was easy…
A winter storm in late February brought hope again of getting some photographs of the San Francisco Peaks covered in snow. So I departed before sunrise one morning to head out towards Mormon Lake. Because of the warm winter up through mid-February, most of Lower Lake Mary and Upper Lake Mary remained mostly ice free. With very cold early morning temperatures it was no surprise that there was fog over the relatively warm open waters of the lakes. When I left my house, the temperature was about +3Â°F. When I reached Lower Lake Mary, the temperature had fallen to -10Â°Fâ€”and there was considerable fog.
It was the same over Upper Lake Mary. I debated whether to change my plans and shoot photographs of the fog over this lake but after viewing the scene I chose to continue to the Mormon Lake Overlook. As I approached the overlook, I could see a layer of fog. Luckily, the overlook was just high enough to be above the fog.
It was a beautiful scene with a shallow layer of fog covering the lake bed and snow on the distant San Francisco Peaks.
After getting a few quick photos I set about to capture a panorama. I shot 12 images: 2 rows of 6 shots. The resulting image is huge and clocks in around 190 megapixels. I can make a print of this that’s 8 feet wide. But I probably won’t because I don’t have a wall large enough for something that big.
It was obvious that sometime during the night the fog layer was much deeper as all the grasses, bushes, and trees were covered with rime ice.
The rime created needles that pointed in the direction of the light wind that had been present during formation. As the sun rose above the horizon, the rime caught the light and sparkled brilliantly.
So we had fog over the lake bed, snow on the mountain, and rime ice on the grasses. What else? Well, a glory became visible as the sun rose high enough to illuminate the fog layer below me. And a short segment of a fog bow was also visible in the fog layer.
Widespread, dense fog covered portions of northern Arizona for more than a week in early December. The fog appeared at Winslow, Arizona (KINW), during the evening of December 3 and finally dissipated on the afternoon of December 12. Similar conditions were experienced in Flagstaff, Arizona (KFLG), with fog appearing on the afternoon of December 4 and finally dissipating in the evening of December 10. For some locations, including Flagstaff, the fog was episodic with periods of dense fog interspersed with clear conditions. Farther to the northeast, including places such as Winslow and the Chinle Valley, the fog was more persistent.
The fog was the result of a heavy rainfall event across northern Arizona December 2â€“4. Many locations received between 1 and 2 inches of rain. Following the rain, high pressure developed across the southwest and a strong thermal inversion developed. The inversion was finally removed when a trough moved across the region bringing strong southwest winds and steeper lapse rates.
It should be noted that thermal inversions are not rare. Quite the contrary. An inversion commonly occurs at night and during the winter when the angle of the sun is very low in the sky. After last years fog event in the Grand Canyon, some in the media declared that thermal inversions are rare and that the inversion wasÂ the cause of the fog. Not really. Both then and now the moisture evaporated out of the soils but was trapped near the ground by the inversion. And, slowly but surely, the moisture content of the lowest few hundred meters of the atmosphere became saturated and fog developed.
Wellâ€”enough of the meteorological explanation. What did it look like (video)?
When these shallow fog events occur it is possible to find hills and mountains that are aboveÂ the inversion so that an observer can look down onÂ the fog. This often results in some amazing photographic opportunities. Anticipating that the fog would occur, I was ready to travel to the Grand Canyon to capture images of the fog filling the canyon. Well, it didn’t quite fill the canyonâ€”at least, not like last year. But there were still photographic opportunities.
I also found myself on the lower slopes of the San Francisco Peaks north of Flagstaff and was able to capture images and video of the fog streaming across the pass between the San Francisco Peaks and O’Leary Peak as well as the sea of fog across the Little Colorado River Valley.