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Silas_Sancona

Optics:  Light ..and dark..

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bubba

I greatly miss the one and only Walter John…

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Silas_Sancona

Fire Rainbows / Firebow ( Circumhorazontal Arc )   ..Year #2:   Sun position in the sky is roughly noon, MST.  Firebow position is 6-o- clock ( due south ) of the Sun. As mentioned in past posts, Firebows are only seen after the sun has reached a position of 58 deg. above the horizon, which would equal roughly 10AM in most places this time of year, and through the summer / early Autumn. It will always be oriented " beneath ", or slightly to the left of where the sun is located in the sky.. Moving in an arc, ..from east / south east, to the south west across the southern sky through the day. Very rare that a cloud sheet is of long enough duration / crystal composition as it passes to see a firebow " follow the sun " thru the entire day.  As with many such events, Cirrus Cloud deck responsible for today's show originated in the Tropical E. Pacific,  southwest of Mexico, rotating clockwise < southwest to northeast > across Arizona and Mexico area today.

..First hint ( silvery blue Cirrus on the upper left of the photo.. Kind of tough to make out the color difference in the picture, but very obvious w/ the naked eye ) ..Only 2 Calendar days off of when i sighted the first of last year's events ( Wednesday, April 14th ).   Trees in the picture are the messy / invasive Leucanea leucocephala  in a neighbor's yard.


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Ramp up phase #1

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Intense phase:

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Fade out phase:

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greysrigging

Does anyone else see a horse coming out of this cloud or have I had too much Good Friday ?
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Silas_Sancona
24 minutes ago, greysrigging said:

Does anyone else see a horse coming out of this cloud or have I had too much Good Friday ?
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A Horse, ..or hand grabbing something.. Would be even cooler if there was a lightning bolt coming out of the finger, or center of the hand.

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Silas_Sancona

Great day for " Sky Optics " as a dying trough of low pressure scoured some moisture off the East Pacific between Mexico and Hawaii, creating a thin band of Cirrus overhead through the day.

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First,  earlier in the day, a good attempt at another Circumhorizontal Arc, ending mostly in broken " Fire Clouds "

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Later, toward Sunset, a pretty vivid example of Cloud Iridescence that formed between bands of thicker Cirrus that were moving through.  Unlike Halos or Arcs, iridescence is caused by sunlight reflecting off individual water droplets or ice crystals.  While the clouds producing the effect seem to be forming in the clear area between the bands of Cirrus, they are actually forming below the Cirrus that is obscuring the sun.

Can see patches of iridescent clouds starting to form at roughly the 5 o' clock position below the sun, and above the group of Washingtonia below.

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Silas_Sancona

How 'bout some night time sky optics..

Lunar  iridescence


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Rando shots playing w/ the long exposure on the camera just after sunset.

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EJ NJ

An image I took recently! Look at how dark the sky is! this was a microcell that had some of the loudest thunder!

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Silas_Sancona

Another day + moisture streaming north from Mexico = more Cch  ( Cch = Circumhorizontal ) Arcs

Illumination ramp- up phase..
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Peak Illumination

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Closer up..

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Wider Angle perspective..

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Flare up before fading out.

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teddytn

Maybe some rain today…C1BC8F5C-ED5D-461A-B339-D961CB6C888E.thumb.jpeg.c777d9f84d1c2ecd9048c31a8de94c8d.jpeg

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Silas_Sancona

Randoms..

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Turret Time..  Classic examples of Alto Cumulus Castellanus w/ some Floccus ( Decaying A.C. Castellanus ) and mid level turbulence induced Asperatus - type bases.

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Waning Full Moon and various subtropical cloud species.. Very tough to photograph the closer up shots..

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Silas_Sancona

 Recent stuff..

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While tracking last night's activity.. While good, by June standards, better storms formed west of Phoenix, while we got  scattered, " pop corn " - type activity.  Some good " rain core dump " shots from the hill regardless, despite very little lightning in any of the passing storms to photograph.

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..And before being chased off my vantage point by a storm trying to come to life overhead, ..a " Mountain Bow "  over the south end of the Superstition Wilderness, and Gold Canyon..  And a pretty good shot of the N.W'strn facing side of the Superstitions themselves. About a half hour before i headed up here to snap pictures, that area was being dumped on and was under a Flash Flood Warning.

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teddytn

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teddytn

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Silas_Sancona

Cumulus castellanus  and the rapid evolution and decay of a Pulse - type thundershower


Cumulus castellanus, just about completely detached from it's base.. Like the Alto Cumulus version, a good sign of an unstable Atmosphere.


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Storms to the west kicking out an outflow boundary that helps initiate new cloud development

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Building Cumulus congestus

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young Cumulonimbus stage

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Near mature Towering Cb ( Cumulonimbus )

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Mature Cumulonimbus, complete w/ the occasional grumble and that Icy, not as crisp definition/ outline look to the cloud itself.

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Collapsing / Decaying Cb. Notice the well defined, dark, flat cloud base is gone, and the entire cloud itself looks " icy ".. In a " multicellular " storm, well defined base would still be present, w/ the tops growing deeper/ higher into the atmosphere. Cloud itself would be much harder to see through as well.  Cumulus development ahead of this storm is also riding the same outflow boundary moving in my general direction. As threatening or vigorous as some might look in the picture, none really did much.

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Another case of ..Plenty of energy and moisture around for good storm coverage, but just not enough " umph " to get more than widely scattered, pulse - type activity going in the valley..

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teddytn

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spike

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Edited by spike
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Silas_Sancona

Moderate " Haboob " progression and some great,  pre - sunset sky optics:

Tonight's " dust up"  lurking on the horizon as another storm starts to awaken to the right..


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Pileus " Crown " atop that quickly strengthening storm.

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..As the dust gets a little closer..

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" Seeds "  ..A term used to describe new storm cells development..  Along converging outflows from the south and east in this case. 

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..As the dust gets a little closer, can see the outflow " reaching out " toward the upper left, toward those developing Seed cells from the beast on the right..

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Getting closer..

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" Seed " development progression.. Notice the dust starting to nose in below from the right / how each Cumulus clump is growing taller..  These would become the strongest part of last night's storms, dumping 1" of rain in some spots in less than an hour,  roughly 3 miles to my east,  knocking down trees in the same area, and flooding part of Hwy. 60 for a time.

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New " Beast "  now fully awake and about to send out a microburst just south of town ( See the " Brown Out " pictures in the Sunset Thread ) Was starting to grumble a bit at this point.. Estimate the cloud top is around 40K ft. atm. Storm is a few miles further south then the mid level cloud " shelf " it appears to be embedded in / sitting atop.

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 " Brown Tsunami "  inbound..

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Into the Dust we go..

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.. As a Gravity Wave from those massive storms in Mexico reached the Valley late last night, some rapidly developing Cumulus, front lit by the moon.  Would go on to form another flashy dumper about a half hour later..

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..As the rising Super Moon emerges from the clouds in a different pat of the sky..

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Silas_Sancona

A few from the Saturday storm event that " swiped left " when approaching/ passing west across Phoenix.


Was sitting around watching  this storm forming due east of Chandler over Globe, AZ which lies just east of Superior up in the foothills. From the radar signature at the time, looked like it was going to make a beeline straight down the 60 into the east valley.  Seeing the opportunity to get pictures of a big storm on approach, headed to this year's new  vantage point to get a better view.

Anvil spreading west as i'm on the road headed east.. Storm itself is still 40+ miles away up in the hills.


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Seeing how dwarfed the San Tans are in this picture, compared to the advancing Anvil, can tell this was a big storm.  ( Would later see cloud tops at this point in it's lifecycle were in the 55-58K ft range )

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As ominous as it looks, can already see the storm starting to turn more to the north ( left in the picture ) then head directly toward my position. Can see clearing sky behind it to the south as well, and no additional development in that same area, or along the outflow boundary headed in my general direction under the front of the storm.. 

Storms wayy off in the distance in picture #2 are already in trouble due to having their source of heat cut off by the first storm.


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What it looked like as it proceeds northwest over the fringe foothill neighborhoods like Apache Junction, Fountain Hills and the mid section of the lower Salt River ( far east side of the Valley ..as you'd begin to head up into the mountains toward towns like Payson, up on that side of the rim )

Essentially, this is a storm turning severe.. Can see both a well developed shelf cloud ..and perhaps some lowering,  mesocyclonic- like development, as well as new cells feeding into the storm above.


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teddytn

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Silas_Sancona

This week's attempt at a Circumhorizontal Arc / Fire Cloud(s)

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Silas_Sancona

Some post- stormy skies on Monday..

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