Showing posts with label cold. Show all posts
Showing posts with label cold. Show all posts

Saturday, December 20, 2008

Cold Cut Switchblade

Well, it's getting a little chilly here again tonight in Denver. As it stands, it's 16ºF with a light breeze at my apartment. The sun was out most of the day, but it never really got much above 30ºF. While that doesn't seem all that cold, the wind sure had a knack for cutting right through me.

Montana is seeing very cold weather again. Temperatures dropped below -20ºF in many locales yesterday and have returned that low already tonight. The GFS and WRF did not show the quick drop in temperature tonight for the area. I wonder if they are having trouble with the timing of the system in the northwest. The warming in Montana just doesn't seem to have begun just yet. In fact, there are some readings below -25ºF currently and even one (Kevin, MT) at -31ºF.

Last night (Friday, the 19th) was the third installment of Convergence! The AMS Club at Metro State was kind enough to host the event and it took a slightly different turn than normal. Instead of just hanging out at the bar and swapping stories, we had a forum to share media. It was a lot of fun (-beer).

I was asked to fill some time so I did a presentation on the Alta Vista Tornado. More specifically, I wanted to talk about how sometimes storm chasing is just about going out and working with what you have. It seems like a lot of attention is paid to the moderate to high risk events. Well, in this case, we saw something happen one day, saw the same pattern the next day, and got lucky. I also wanted to show people that a non-traditional storm (in this case, a VERY LP-supercell) can still tornado under the right circumstances. I tried to cover this as best I could given the documentation that I had. However, my power-point presentation did not make it to the event intact. Unfortunately, I only linked the diagrams and pictures instead of inserting them. So, of course, nothing showed up. Luckily, I was able to talk my way through with some stuff I had uploaded to the infobahn and a couple secondary things that I had remembered to bring. Hopefully people enjoyed the talk.

Tony Laubach was up next and he presented the May 29th chapter of his latest chasing DVD. I had already seen it, so I knew what to expect (though thoroughly enjoyed it for the third time!), but it was cool to hear the oohs and ahhs from the audience.

Next up, we got to see some of the May 22nd chapter of the latest Carlson Chasers DVD. I had seen some bits and pieces before but it was nice to see the full presentation. I still need to pick up a copy of their DVD.

Cameron Redwine then wowed us with some slide of his storm photography. He doesn't have much material online or I'd link him, but he has some fantastic shots. He's been chasing in Colorado since 1997 and has documented completely with use of a film camera. It definitely gave me an appreciation for the film quality.

Kendall LaRoche was next and he showed some pictures of his front porch storm spotting, which was cool. I had the pleasure of bringing him along on his very first storm chase back in April. You should have seen his face the first time we saw lightning on that particular day.

Finally, Dr. Richard Wagner (from Metro State) did a presentation of below-zero climatology for Denver and finished it up by talking El Niño and La Niña trends here.

There were some new faces there, which was nice. Some of them were chasers and some of them not. All in all, it was a fun night.

The next event is tentatively scheduled for Saturday, January 31st.


A couple days ago, I promised some shots from our grauple/thundersnow event. Though I didn't hear thunder, there were several reports in the metro along with some lightning strikes showing up.






I've enjoyed putting the information on the tropics in my posts for the past week. For some reason, the last couple years have seen me more excited about the Southern Hemisphere season than the more "local" events. I guess if you're reading this, let me know if you like seeing the tropical weather on here.




Satellite imagery used with permission; courtesy of IPS Meteostar Inc. Click for larger images.

And finally, Michael Carlson posted this link on Storm Track recently. I figured I'd share it as well.

The Big Picture (2008 Year in Photographs)
Part I
Part II
Part III

Dann.

Tuesday, December 16, 2008

More Cold Than You Can Shake A Popcicle At

Well, how about another update on the cold?

-Denver tied a 111-year-old record by dropping to -8ºF this morning.

-Also, Butte, Montana crushed a record low maximum for December 15th at -9ºF. The previous record was 0ºF.

-The coldest spot in the nation this morning was Longville, Minnesota at -35ºF.

Select Montana minimums for December 16th:
-28º Jordan
-27º Cut Bank
-27º Wolf Point
-26º Glendive
-25º Glasgow
-24º Dillon
-24º Great Falls
-23º Lewistown
-22º Bozeman
-22º Butte
-22º Havre
-22º Sidney
-21º Baker
-20º Miles City
-17º Helena
-17º Malmstrom Air Force Base (Great Falls)
-17º Livingston
-16º Kalispell
-15º Billings
-15º Missoula

If the GFS verifies, we're looking at another cold weekend in the northern Rockies and adjacent plains.


And now, some pretty picture (click for larger) from contributors.

The first two are courtesy of Alan Clark of Rock Springs, Wyoming. Fantastic shots of halos and a moon dog. According to Alan, the pictures were 8 second exposures taken at 100 ISO. They were taken in Rock Springs at 6:30PM on December 11th. Thanks Alan!




The next photo comes from Cassie Robinson in Fargo, North Dakota. I believe it was taken early on the 15th.



Dann.

Monday, December 15, 2008

Continuing Cold

Well, since I was tracking temperatures in Montana yesterday, I figured I'd update a few today. I'm just including the METAR sites this time as there were not outstanding intermediate readings.

Note, these are not official climatological lows for any specific period. They simply are the lowest reported reading or reported minimum within the last 24 hours ending today at 22Z.

-33º Havre (with wind chills approaching -60ºF!)
-32º Glasgow
-32º Jordan
-29º Glendive
-29º Lewistown
-28º Wolf Point
-27º Dillon
-26º Baker
-26º Great Falls
-26º Sydney
-25º Cut Bank
-23º Miles City
-19º Billings
-17º Butte
-16º Helena

The -33ºF in Havre was the lowest observation that I could find. That is cold!



...

Not to be out done, Denver experienced some cold this morning as well. I was coming back from a graduation party at * ahem *, four this morning and I noticed that it seemed "Butte-cold" out. What do I mean by "Butte-cold"? Well, growing up in Butte, Montana, during similar arctic air masses, the cold air would often sink into the valleys of southwestern Montana creating extremely cold pockets of air. I've seen as low as -48ºF and been outside at -46ºF (imagine me sitting in my living room in back in the late 90's, preparing to go out and deliver newspapers when turning on the Weather Channel and seeing THAT on the local forecast). It felt similar in Denver this morning as the cold air hugged the lower areas in the Front Range. It was cool to see all the refineries in Commerce City and their billowing steam plumes coming to an abrupt stop at the top of the inversion. One refinery had a nice flame on the top which was flickering and illuminating the "cloud deck" almost making it look like there were explosions occurring. It was very odd.

Speaking of inversions, check out the sounding from this morning!


Click for larger image.
From http://rap.ucar.edu/weather


Now let's talk temperatures...

Minimums from official stations in the Denver area this morning:
-19º Denver International Airport
-13º Buckley Air Force Base
-11º Rocky Mountain Metropolitan Airport
-9º Centennial Airport


Minimums from elsewhere along the Front Range and Northeast Colorado:
-20º Greeley
-18º Fort Collins
-16º Sidney, NE
-15º Akron
-13º Cheyenne, WY
-9º Pueblo
-8º Colorado Springs

UDFCD Mesonet Minimums:
-21º Brighton North
-18º Brighton
-17º Pump Station 3 (E Aurora)
-16º Button Rock (Boulder County)
-13º Louisville Lake (Louisville)
-13º Urban Farm (Stapleton-Denver)
-10º Highlands Ranch
-9º Aurora Reservoir
-9º Aurora Town Hall
-9º Quincy Reservoir
-8º Diamond Hill (W Downtown Denver)
-8º Ward (Boulder County)
-6º Squaw Mountain (Clear Creek County)*
-1º Hiwan Golf Club (Jefferson County)*
2º Elbert*
5º Cal-Wood Ranch (Boulder County)*
5º Sugarloaf (Boulder County)*
7º Blue Mountain (Jefferson County)*
11º Castle Rock*
* stations at higher elevations either in the foothills or on the Palmer Divide

Wow, that's cold for Denver! The low at the airport of -19º smashes the record by 15ºF!!


Elsewhere in the world:
Click for larger image.

This is Typhoon 27W Dolphin. Figured that might warm you all up just a bit.

Satellite image used with permission; courtesy of IPS Meteostar Inc.

Dann.