It’s March and the days are getting longer and warmer. The recent epic snow in Sedona has melted and most of the mud is gone to be replaced by perfect trail conditions. Melting snow from the higher terrain continues to flow down Dry Creek and Oak Creek and the runoff in the creeks is impressive.
A few afternoons ago, I headed up to the South Rim of Grand Canyon. My hope was to catch the nearly-full rising Moon as it appeared from behind Cape Royal on the North Rim. I was successful last year and I wanted to try it again — and get it even better.
A winter storm was winding down and there were breaks in the clouds by mid afternoon. But the breaks didn’t happen in the right place or right time to capture the moon rising above Cape Royal.
So it was time to switch to the backup plan and I ended up photographing the clouds and fog that were moving across the canyon along with all the fresh snow on the South Rim.
Flagstaff’s February weather has been very active with rain and/or snow recorded on seven days out of the first fifteen. Several days of snow on the Kachina Peaks covered the trees with a thick coating of rime ice and lots of new snow on the slopes.
And then we had an “atmospheric river” that produced a significant amount of winter rain with about 1.5 inches falling in the Flagstaff area. The runoff in Oak Creek and its tributaries was impressive.
And the forecast for the next week or so is a continuation of stormy weather with lots of snow for the higher elevations. I believe the long-anticipated El Niño has finally arrived.
Comet C/2018 Y1 Iwamoto has just made its closest approach to Earth this week. With one evening of clear skies forecasted before the next storm system moves into the area, I went out earlier this week (02/11/2019) to capture images of this fast-moving, blue-green comet. The Moon was up in the western sky with 38% of the disk illuminated. This caused considerable brightening of the sky and made it challenging to capture fine details of the comet.
Discovered by Japanese amateur Masayuki Iwamoto as a +12th magnitude fuzzball moving through the constellation Hydra the Water Serpent on the night of December 18th, 2018, Y1 Iwamoto is a fast mover. It’s great to see that amateur astronomers can and still do discover comets, as the robotic competition posed by automated surveys such as PanSTARRS makes such an independent discovery tough these days…
At its closest on February 13th, Comet Y1 Iwamoto will appear to move seven degrees a day. This translates into a fast apparent motion of about 2/3rds the apparent diameter of a Full Moon, every hour.
The comet was easy to find with a pair of binoculars but was not visible to the unaided eye. Its position on this evening was near enough to the bright star Regulus that I had no trouble aligning the camera.
The following image and animation show the motion of the comet during a period of just over one hour.
Time lapse movie showing the motion of C/2018 Y1 during a period of one hour.
Comet C/2018 Y1 Iwamoto will make its next passage through the inner solar system in 3390 AD.
Over the weekend we had an extended period of rain in the Flagstaff area. Normally we would see snow at this time of year.—it is, after all, the middle of winter. Rainfall amounts were sufficient (1.35 inches at Flagstaff airport) to cause large increases in the flow of Oak Creek where gauges recorded a rise from ~2.4 feet (30 cfs) to 9.6 feet (6900 cfs). Other streams were running high as well.
I though it might be interesting to look at Lake Mary and Mormon Lake to see if lake levels were increasing as a result of the runoff. Indeed, they were, but not quite as much as I had hoped. Still, water rushing down Newman Canyon, a normally dry wash, into Upper Lake Mary was impressive.
Back in December 2004, we had a much bigger rain event. Lake Mary was frozen and the water rushing down the hillsides flowed across the top of the ice. The immense weight of the water caused the ice to break with thunderous booms. That is what I was hoping to experience. Didn’t happen because there was no ice this time.
My next stop was Mormon Lake. As I drove towards it the sun was able to break through the thinning clouds to my south. I took a quick look in the rear-view mirror to check for rainbows.
And, there it was. A winter rainbow in Flagstaff. Not rare, but certainly not common.