Monday, February 06, 2012

2012 - January 23rd - The Pollock Bench & Flume Creek Canyon, McInnis Canyons National Conservation Area/Black Ridge Canyons Wilderness

Ever since my previous visit to Flume Creek Canyon (account here), I had wanted to return and explore more of it.  I had to turn around due to darkness on that previous venture.  I had also visited the area once more after that, taking the grueling 14.5 mile trek in and out of Rattlesnake Canyon (account here).   But I had always promised myself to return during cooler months to explore.

Well, it was January and that counts as one of the cooler months as far as most are concerned, well, unless you live in the southern hemisphere. I was looking to get out and do a bit of exploring and recruited my coworker Shannon to come along.  We decided upon a tour of the Flume Creek area by way of the Pollock Bench.  There were three choices for us: A four mile, up and down Flume Creek Canyon trek, a six mile, up the bench, out the canyon trek and a seven and a half mile Pollock Canyon Rim and out Flume Creek route.  We decided upon the middle one due to time constraints.

It wasn't a stunningly gorgeous day by any means.  A mid-level cloud deck curved over the terrain of the Uncompahgre Plateau.  It just felt good to be outside. 

About the Uncompahgre Plateau, it is a large area of geologic uplift that stretches from the Colroado River near Grand Junction at its northern most point to the San Juans to the south.  Along the northern edges, deep canyons are cut into the sandstone and most of this area is part of the McInnis Canyons National Conservation Area. I talk about it enough that I ought to show a diagram.  I found the image below here.




We made it to the trail head by late morning and were soon ascending out of the wide expanse of the Flume Creek drainage onto the Pollock Bench.  Once atop, the bentonite clay trail became extremely muddy and slowed us down some.  We were in good spirits about it however, and continued on, trying not to fall.


The trail through the center of the bench winds through PiƱon-Juniper with occasionally tremendous views of the Grand Valley to the east, Pollock Canyon to the west and the Black Ridge to the south.


Eventually, we started coming close to the edge of the bench and were afforded a decent view of Pollock Canyon.  I hadn't even really thought about my camera yet since the light was bad and we were walking into the sun.


However, at an overlook, I noticed a turbulent pattern in the bottom of the cloud deck. 


Looking west over Pollock Canyon...

It almost appeared to be a weak version of the as of yet unofficial undulatus asperatus. So, of course, I started snapping away.  How could I pass up a meteorological moment? 

The turbulent undulatus asperatus to the south...

Shannon is studying meteorology, so she was also quite intrigued by the clouds.  It was a nice surprise for us on an otherwise overcast day.  The sun did try and peek out a couple of times, however and did for a moment while were standing there; though it was a little filtered. 

A brief moment of sun and Pollock Canyon...


The trail turned from south to east at this point, through a natural pass between the Pollock and Flume drainages.  Unfortunately, due to the the trail being on the north slope of the topography, we started to encounter icy patches.  There were a couple of times that we came close to eating it as we trekked up the occasional steep slope.  Shannon also occasionally dropped a Cocoa Puff on the ground in an effort to give the native animal population Diabetes. At least, that's what I assumed was going on.

As we finally made it over the hump into the Flume Creek drainage, the sun did grace us with its presence for a little while.  This gave me a nice opportunity for a photo op with a balancing rock. 

Looking northwest into Flume Creek Canyon, the Book Cliffs distant...

We continued along the "pass" between drainages and at one point, heard voices.  It almost sounded like someone talking to a dog.  We never did see anyone and it was a little creepy, but we never heard anything again.

The trail finally descends into the Flume Creek Canyon at a natural boundary between the upper portion of the canyon (marked by an escarpment which can be seen on the map at the bottom) We took pause there to get a drink and have a snack.  The sun was generous enough to hang around for a few minutes.  Shannon touched a small cactus which pricked her.  For some reason, I thought that I should touch it too.  I'm sure you can imagine the result.  The most unfortunate quality of this succulent is that the spikes have tiny hooks on their ends which get stuck on and or tear out your skin.  I bled.

We hit the bottom of the canyon at this point and followed the sandstone-walled wash for a while.  Occasionally, a cottonwood tree would divide the otherwise narrow corridor.  Eventually, the canyon widens out a bit and the trail leaves the wash.

At this point, we noticed that there was a deep and sudden chasm to the side of the trail.  We investigated and found a big drop.  I began to fantasize about possible waterfall opportunities come runoff.

I worked my way over to the top of the drop to get a picture, trying not to slip on the ice and plummet into its depths.

Flume Creek Canyon's inner gorge... 

There was also a significant overhang.  We flirted with the possibility of exploring the lower canyon, but had trouble finding access until a mile or so downstream.  At that point, we were running a little low on time and Shannon was having a problem with her contact lens. 

We eventually made it to a place where we could access the wash again but followed it downstream from there, through a couple narrow areas and down one or two drops that I had previously discovered.  Occasionally, we would try and balance on ice bergs frozen into small potholes.  Occasionally, we would end up with wet feet.

The rest of the hike back was uneventful.  I do plan on returning to explore once again.  I'd like to head all the way up the inner gorge to the drop, hopefully when water is running.  I may have to wait until April or May, however.  I'd also like to get back down into Pollock Canyon.  I crossed the canyon (not an easy task!) on the way to the Rattlesnake Arches in the post mentioned above.  So, I'm not quite done with this trail head just yet.

Detail Map (Click For Larger Version)

Dann.

Wednesday, February 01, 2012

2012 Storm Chase 1 - January 16th - Super January In The Desert

A potent shortwave was heading through the Rockies, giving the Western Slope's mountains a decent shot of snow.  During the warm air advection phase, southwestern-facing mountain slopes got hammered and some areas like Montrose actually experienced a decent overnight chinook wind event.  I worked on Sunday, the 15th and made my forecast.  It did not include much in the way of convection for the 16th, save along the cold front.

2012-01-17 00Z (5PM MST on the 16th)

I had Monday the 16th off, but found myself at work for a meeting.  I was quite distracted with the incoming cold front and spent a lot of time in the weather center with our evening meteorologist, Eddie Sheerr.  It's not uncommon on days like this to find me at work on my day off, looking through the models and watching radar. 

Convection was fairly impressive along the cold front as it swept across the valley.  Well, impressive for mid-January, anyway.  There was certainly some vertical height to the clouds and the precipitation took on a more downdraft-look. 

I was about to wrap up my time at the station and head home from dinner when I noticed that convection was firing behind the cold front.  I stuck my nose out the door and noticed some interesting structure.  I wish that I would have taken a moment to grab an image, but unfortunately, I jumped right in my car and headed north to the desert. 

Here's a radar grab from about that time.  Circled is the new area of convection behind the front:


As I raced north on 25 Road, I was rubbing my eyes, trying to figure out if what I was seeing was real.  The storm appeared to have a mesocyclonic base and lowering.  I kept telling myself to stop and take a picture, but I was so close to the desert and a clear view, so I continued on.

By the time I got to a good vantage, the feature began to dissipate, but you can still make out the basic structure, including the lowered portion.  For another reason I cannot explain, I only captured an image with my phone. 

 First View From The Desert

Even more baffling, the wind was out of the southeast.  The cold front had just passed with a brisk northwest wind and suddenly the surface winds were backing toward this new storm.  Could it be surface-based?  If there's one thing I've learned about this valley and cold fronts, it's that sometimes they make it warmer!  Fronts often act as inversion scrubbers, with the new air mass sometimes replacing a stagnant, cold one.  That's another reason I believe that this storm was surface based.  

On radar, it the reflectivity had a sickle-shape, open to the east.  I made sure to save the radar image on my phone for future reference... 

From my vantage, I watched as the fast-moving storm relinquished it's low-level surface features and passed just to my north.  The wind shifted and became quite cold as the downdraft was loaded with grauple.

The storm's base and grauple core.

I was absolutely elated as this was an unexpected treat.  I just stood outside and reveled in the smell of the storm and the feeling of its proximity.  At no time did I hear thunder nor did I see any nearby activity on lightning data, but it was still quite convective.  That should be fairly obvious in the photos below.

Passing overhead.

As the storm weakened and moved off to the north, I started to get a pretty good luck at the updraft tower, which was visibly rotating.





Farther south, more convection seemed to erupt along the same axis.  It looked more linear in nature, but was rather thin and definitely had an interesting appearance. 



As the more isolated storm neared the Book Cliffs, it really turned into a grauple-factory. 


A fresh coat of grauple-white on the cliffs.

As the (now) line of storms passed, the sun began to peer out from the low cloud deck over the northern reaches of the Uncompahgre Plateau, casting its rays occasionally on the Book Cliffs.  I drove a bit north for a better vantage and spent a lot of time taking various pictures of the changing light. 













The light began to fade on the cliffs and I started to get hungry, so I began to head back.  I soon realized that the sunset was probably going to be amazing, so I stopped at a good vantage and waited.  And let me tell you, I was not disappointed. 




I kept noticing a dust speck on my sensor, so I thought it would be a good idea to blow into the body of the camera.  Well, this only proved to introduce moisture which made everything foggy.  Take this image of the sun, for example:


After a few minutes, the lens fog cleared and the sun began to set.  It was about to get spectacular.









Up to this point, I had taken several pictures with my phone as well.  However, frequent use of the GPS on my phone causes it to do strange things.  For example, the buttons seem to reassign themselves.  After taking a picture, I tried to turn my phone's screen off, and it did a screen capture.  It takes a while to back out of whatever program it gets itself into, so I just gave up and popped the battery out.

Once my phone rebooted, I tried to take another picture, but the phone said it couldn't find my SD card.  I opened the phone back up and didn't notice that the SD card was no longer in the slot.  We'll come back to this later.  Annoyed, I stashed my phone in the center console and kept clicking away at the sunset with my point-and-shoot.  It wasn't to be missed!








Now that you've enjoyed a thousand pictures of the sunset, let me tell you a tale of woe.  On my way home, I stopped at the market to pick up some beer and then at the Verizon store to have them look at my phone.  As it turns out, the micro SD card was gone.  Since it has to be in the phone to take pictures and I was taking pictures prior to opening the case, it must have fallen out then.  I searched my vehicle high and low to find the small card, but to no avail.  I resolved that it had to be out in the desert.

After meeting some friends for dinner, I returned to the desert with my headlamp and scoured the area where I had parked.  I found my tire tracks and realized that if it had fallen out of the vehicle there, it could only have been in one spot, since I had only left the vehicle once.

Unfortunately, nothing... I would have to return during daylight when I could see better.

I looked through my car, the parking lot at the market and at the Verizon store the next day and nothing.  I returned to the desert and sifted through the sand for an hour.  Nothing.  It completely vanished.

So, that's the sad story.  However, the storm and the sunset were amazing, so I'm going to focus on that!  I feel incredibly lucky that I was able to recognize the situation, take advantage of it and experience a rotating storm in January in the desert.  There aren't many opportunities for a decent storm chase out here.

I'm going to go ahead and call it as I see it, a weak, low-topped supercell.  Any objections? 

STATS
Mileage: 22
2012YTD Mileage: 22
States: Colorado
SPC Risk: None
Max Hail: Grauple-fiesta!
Tornadoes: None
Other Phenomena: It's freaking winter, that's phenomenal. 
Storm Reports for January 16th


Detail Map:

Dann.