beavis1729 Posted October 24, 2011 Share Posted October 24, 2011 With winter coming and inspired by the International Falls thread, here are some notable cold records for Boulder (I'm using them instead of Denver because Boulder has continuous records in the same general location back to 1893). Earliest sub-freezing temperature: 9/9/1941 Earliest sub-freezing high: 10/11/2009 Earliest sub-20 temperature: 9/29/1985 Earliest sub-10 temperature: 10/13/1969 Earliest sub-zero temperature: 10/29/1917 Coldest November temperature: -12 11/27/1919 Coldest December temperature: -24 12/22/1990 Coldest January temperature: -33 1/17/1930 Coldest February temperature: -28 2/9/1936 Coldest high temperature: -12 on 2/4/1989 Coldest March temperature: -13 3/9/1932 Wow, Boulder has been sub-zero in October...that's crazy. Colorado climate at its best... Link to comment Share on other sites More sharing options...
Thundersnow12 Posted October 24, 2011 Share Posted October 24, 2011 Both my neighbors go to school in Boulder and Ft. Collins, should be interesting on amounts in both spots. Link to comment Share on other sites More sharing options...
baroclinic_instability Posted October 24, 2011 Share Posted October 24, 2011 This is going to be a biggie. Great low level trajectories for much of the Foothills as well as the Palmer Divide. Some parts near the Divide will easily see 12+. Link to comment Share on other sites More sharing options...
Vandy Posted October 24, 2011 Share Posted October 24, 2011 Lost in all the talk about snow starting tomorrow night is that DIA set a record high today. Link to comment Share on other sites More sharing options...
tacoman25 Posted October 24, 2011 Share Posted October 24, 2011 Lost in all the talk about snow starting tomorrow night is that DIA set a record high today. Boring. And 79 was a weak record, the record from yesterday was 87. Link to comment Share on other sites More sharing options...
baroclinic_instability Posted October 24, 2011 Share Posted October 24, 2011 Gorgeous mountain wave activity today across all of the intermountain W ahead of the leading low ampltitude northern stream shortwave. Mountains waves in the Sierra Nevada, the Laramie Range, Front Range mainly in the Medicine Bows, and the Bighorns of Wyoming. I love mountain wave induced lee cirrus. Link to comment Share on other sites More sharing options...
Chinook Posted October 25, 2011 Author Share Posted October 25, 2011 Gorgeous mountain wave activity today across all of the intermountain W ahead of the leading low ampltitude northern stream shortwave. Mountains waves in the Sierra Nevada, the Laramie Range, Front Range mainly in the Medicine Bows, and the Bighorns of Wyoming. I love mountain wave induced lee cirrus. Gorgeous lenticular clouds Now onto the weather discussion. Here are the QPF values for me: 06z NAM: 31.2mm 12z NAM: 29.9 mm 18z NAM: 31.1 mm 06z GFS: 26.6mm 12z GFS: 31.5mm 18z GFS: 20.1mm Now, as to the precipitation type. The GFS shows some temperatures above freezing at 800mb. This shouldn't be too much of a problem. Maybe it will mean a couple of those millimeters will be in the form of rain. I'm not sure I want to shovel this much. Link to comment Share on other sites More sharing options...
baroclinic_instability Posted October 25, 2011 Share Posted October 25, 2011 Great pictures Chinook! Nice trapped wave action. That must have been later in the day after the leading low amplitude shortwave ejected based on the wave mode. Link to comment Share on other sites More sharing options...
baroclinic_instability Posted October 25, 2011 Share Posted October 25, 2011 It is going to be a mess of a commute Thursday morning for the entire Front Range Wednesday morning. IOt is going to be ripping it once you begin upsloping away from the Cheyenne Ridge and the northern Front Range. Foothills/Denver/Palmer Divide going to be a tricky commute. I am envious of you guys. Link to comment Share on other sites More sharing options...
beavis1729 Posted October 25, 2011 Share Posted October 25, 2011 Boring. And 79 was a weak record, the record from yesterday was 87. When Denver hit 80 yesterday afternoon to break the old record high, the dewpoint was -4. Link to comment Share on other sites More sharing options...
boulderrr Posted October 25, 2011 Share Posted October 25, 2011 Looks like I'm near the bull's eye for this one! Perhaps I should pick up a 6-pack of Upslope IPA for tonight. Link to comment Share on other sites More sharing options...
tacoman25 Posted October 25, 2011 Share Posted October 25, 2011 It is going to be a mess of a commute Thursday morning for the entire Front Range Wednesday morning. IOt is going to be ripping it once you begin upsloping away from the Cheyenne Ridge and the northern Front Range. Foothills/Denver/Palmer Divide going to be a tricky commute. I am envious of you guys. NWS going with 6-12" for the city in their winter storm warning now, with higher amounts for the foothills and Palmer Divide. Link to comment Share on other sites More sharing options...
Chinook Posted October 25, 2011 Author Share Posted October 25, 2011 Great pictures Chinook! Nice trapped wave action. That must have been later in the day after the leading low amplitude shortwave ejected based on the wave mode. Sometimes the clouds amaze me. The lenticulars and even the little bits of the thin cirrus and other interesting clouds just didn't exist when I lived in Ohio. Link to comment Share on other sites More sharing options...
Chinook Posted October 25, 2011 Author Share Posted October 25, 2011 UPSLOPE WINDS COMBINING WITH THE DYNAMICS OF THE UPPER TROUGH ANDJET STREAM WILL CREATE NEARLY OPTIMAL CONDITIONS FOR SNOW TO FALL FOR SEVERAL HOURS OVERNIGHT. TEMPERATURES WILL ALSO BE DOWN AROUND THE FREEZING MARK...ALLOWING SNOW TO BEGIN ACCUMULATING SHORTLY AFTER IT BEGINS TO FALL. FORECAST SNOW AMOUNTS MAY NEED TO BE BUMPED UP A LITTLE WITH THE AFTERNOON PACKAGE. Wow. Link to comment Share on other sites More sharing options...
boulderrr Posted October 25, 2011 Share Posted October 25, 2011 UPSLOPE WINDS COMBINING WITH THE DYNAMICS OF THE UPPER TROUGH ANDJET STREAM WILL CREATE NEARLY OPTIMAL CONDITIONS FOR SNOW TO FALL FOR SEVERAL HOURS OVERNIGHT. TEMPERATURES WILL ALSO BE DOWN AROUND THE FREEZING MARK...ALLOWING SNOW TO BEGIN ACCUMULATING SHORTLY AFTER IT BEGINS TO FALL. FORECAST SNOW AMOUNTS MAY NEED TO BE BUMPED UP A LITTLE WITH THE AFTERNOON PACKAGE. Wow. Saw that in their discussion. I'm loving it. Clouds really starting to thicken over and especially north of Boulder. Still 52F with 48% RH, but the wind is out of the NE. Link to comment Share on other sites More sharing options...
tacoman25 Posted October 25, 2011 Share Posted October 25, 2011 Saw that in their discussion. I'm loving it. Clouds really starting to thicken over and especially north of Boulder. Still 52F with 48% RH, but the wind is out of the NE. Yup, I've been watching the same thing here in Westminster. Love the anticipation before a big storm...and that refreshing NE wind. Link to comment Share on other sites More sharing options...
boulderrr Posted October 25, 2011 Share Posted October 25, 2011 Yup, I've been watching the same thing here in Westminster. Love the anticipation before a big storm...and that refreshing NE wind. I just wish Greeley wasn't located to the NE of us. We joke that we know it is going to snow a lot when it starts smelling like slaughtered cows. Link to comment Share on other sites More sharing options...
tacoman25 Posted October 25, 2011 Share Posted October 25, 2011 I just wish Greeley wasn't located to the NE of us. We joke that we know it is going to snow a lot when it starts smelling like slaughtered cows. Ha, true. From 9news.com...I bet a lot of people are going to have trouble getting to work tomorrow morning. According to the Denver Public Works Street Maintenance team, they will focus their snow-clearing efforts on main streets and "streets with stripes." They will not treat side streets because it does not meet their criteria set for side-street clearing. That criteria is: between Nov. 15 and March 15 12-inches or more of snow predicted prolonged freezing temperatures Also, since the forecasts say there will be rain that turns into snow, the City will not be pre-treating the roads. "Our anti-icer will simply run off the streets with the rain. We need dry pavement to make the anti-icer effective," the release says. The City plans to address icy and slick conditions on bridges, overpasses on a case-by-case basis. Link to comment Share on other sites More sharing options...
boulderrr Posted October 25, 2011 Share Posted October 25, 2011 Ha, true. From 9news.com...I bet a lot of people are going to have trouble getting to work tomorrow morning. According to the Denver Public Works Street Maintenance team, they will focus their snow-clearing efforts on main streets and "streets with stripes." They will not treat side streets because it does not meet their criteria set for side-street clearing. That criteria is: between Nov. 15 and March 15 12-inches or more of snow predicted prolonged freezing temperatures Also, since the forecasts say there will be rain that turns into snow, the City will not be pre-treating the roads. "Our anti-icer will simply run off the streets with the rain. We need dry pavement to make the anti-icer effective," the release says. The City plans to address icy and slick conditions on bridges, overpasses on a case-by-case basis. Very interesting... No pre-treatment of any roads and no treatment whatsoever for side streets. I wonder if Boulder County / City has the same policies. Here at work, we just got the standard "Winter Office Closure Procedures" emailed to us. I live in Boulder Canyon and, as you can imagine, that road gets pretty sketchy with any snow, let alone 12 inches. *Edit* - Boulder City Street and Path Snow Removal: The City of Boulder's snow crews are ready to respond 24 hours a day from mid-September to the end of April to snowy and icy conditions. The snow crews work hard to keep primary and secondary streets and on-street bike lanes open, using materials and equipment that help reduce the dangers inherent in winter travelling. Primary routes are the city's first priority for plowing and applying materials. Primary routes are the major streets that run throughout the city. Two plow trucks are assigned to each of our five primary routes. (Multi-use paths throughout the city begin being plowed at the same time as streets.) Secondary routes are the streets around schools and hospitals, most RTD bus routes, collector streets and streets requiring special attention in snowy conditions. Plowing of these routes begins at the same time as plowing of primary routes; however, there is one truck assigned to each of these routes. Link to comment Share on other sites More sharing options...
deltadog03 Posted October 25, 2011 Share Posted October 25, 2011 We had a little snow up here in Casper, WY, But NOTHING to what Cheyenne, Laramie, Ft. Collins, Boulder and what Denver will see....I see a wide spread 6-12" of snow....Not gonna lie, I am jealous Link to comment Share on other sites More sharing options...
tacoman25 Posted October 25, 2011 Share Posted October 25, 2011 We had a little snow up here in Casper, WY, But NOTHING to what Cheyenne, Laramie, Ft. Collins, Boulder and what Denver will see....I see a wide spread 6-12" of snow....Not gonna lie, I am jealous Well, you guys up there did much better than us last winter (I believe), so now it's our turn. Link to comment Share on other sites More sharing options...
hugo_fran Posted October 25, 2011 Share Posted October 25, 2011 Carolina native here recently relocated to Highlands Ranch. Love this Colorado weather - happy to contribute obs from down here. Link to comment Share on other sites More sharing options...
tacoman25 Posted October 25, 2011 Share Posted October 25, 2011 Very interesting... No pre-treatment of any roads and no treatment whatsoever for side streets. I wonder if Boulder County / City has the same policies. Here at work, we just got the standard "Winter Office Closure Procedures" emailed to us. I live in Boulder Canyon and, as you can imagine, that road gets pretty sketchy with any snow, let alone 12 inches. *Edit* - Boulder City Street and Path Snow Removal: I don't know this for sure, but I think Denver cut back on the snow removal/street treatment budget...or they are at least following more stringent standards after what happened in 2006-07 and 2009-10. If I remember correctly, they exhausted the budget about half way through those winters, with all the big early season storms. Link to comment Share on other sites More sharing options...
boulderrr Posted October 25, 2011 Share Posted October 25, 2011 Drizzling now here in Boulder. 45F 62% RH NE wind Snowing up at the base of Eldora - 9,200 ft. http://eldora.com/see.web.html Link to comment Share on other sites More sharing options...
bainbridgekid Posted October 25, 2011 Share Posted October 25, 2011 No chance for snow here in Bellingham, Washington for quite a while. In the mean time I'm really looking forward to tracking this and seeing all of your obs! Totally crazy to go from 80 (with a -4 DP) on Monday to heavy snow 36 hours later. Every run on the GFS continues to show over an inch of QPF for KDEN so there hasn't been any weakening in the final stretch. Enjoy the storm and take lots of pictures! Link to comment Share on other sites More sharing options...
hugo_fran Posted October 25, 2011 Share Posted October 25, 2011 Carolina native here recently relocated to Highlands Ranch. Love this Colorado weather - happy to contribute obs from down here. Precip started at 4:16 here. Link to comment Share on other sites More sharing options...
icebreaker5221 Posted October 25, 2011 Share Posted October 25, 2011 If anything, both 18Z GFS and NAM runs look better than respective 12Z runs. This one might even require the H word! Link to comment Share on other sites More sharing options...
Nomad Posted October 25, 2011 Share Posted October 25, 2011 Carolina native here recently relocated to Highlands Ranch. Love this Colorado weather - happy to contribute obs from down here. Nice to have you. I just moved here this summer from east TN (Kingsport). Looking forward to the snow as well. Link to comment Share on other sites More sharing options...
Chinook Posted October 25, 2011 Author Share Posted October 25, 2011 Precip started at 4:16 here. We are getting a few tiny raindrops. The foothills are beginning to get hazy/disappear into the cloud deck. Link to comment Share on other sites More sharing options...
Chinook Posted October 25, 2011 Author Share Posted October 25, 2011 If anything, both 18Z GFS and NAM runs look better than respective 12Z runs. This one might even require the H word! Hockey? Link to comment Share on other sites More sharing options...
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