Chinook Posted November 8, 2014 Author Share Posted November 8, 2014 INITIAL STRONG COLD FRONT EXPECTED DURING THE DAY ON MONDAY.MODELS SOMEWHAT DIFFER ON TIMING OF COLD FRONT WITH GFS FASTER WITH ARRIVAL MONDAY AM WHILE NAM A BIT LATER ON MONDAY AFTERNOON. WILL KIND OF PLAY IN BETWEEN ON TEMPERATURES FOR DAY TIME HIGHS. INCREASING MOISTURE AND SHALLOW UPSLOPE DEVELOP MONDAY AFTERNOON AND EVENING WITH MODEST QG UPWARD FORCING MONDAY EVENING. COULD BE SOME LIGHT SNOW ACCUMULATIONS WITH THIS PATTERN OVER PLAINS AND EAST SLOPES. MUCH COLDER ON TUESDAY WITH TEMPERATURES REMAINING IN THE 20S AS 700MB TEMPS PLUMMET TO -9C. THERE WILL BE A BIT OF A BREAK IN SNOWFALL ON TUESDAY BEFORE NEXT WAVE APPROACHES NORTHERN COLORADO ON WEDNESDAY I think we could see some snow on Monday afternoon or Monday night. Temperatures of 20-30 degrees will move into northeast plains of Colorado on Monday or Monday night, and there will be some lift at 500mb. Link to comment Share on other sites More sharing options...
Chinook Posted November 8, 2014 Author Share Posted November 8, 2014 The GFS is showing some snow accumulation on Wednesday-Thursday for this area, with a second vort max. The main low is long gone. I took a trip to Estes Park. The mountains are looking pretty gray. I think less than 12" of snow is sitting up at 12000ft. Link to comment Share on other sites More sharing options...
winterymix Posted November 9, 2014 Share Posted November 9, 2014 Colorado is going to get rocked hard.Central Colorado temperatures tomorrow are expected in the middle 70s and thenby Wednesday night, 9 degrees above zero.Temperature departures could be 40 to 50 degrees below average briefly.A reinforcing shot is possible in seven days. Link to comment Share on other sites More sharing options...
beavis1729 Posted November 9, 2014 Share Posted November 9, 2014 ? He was saying that "bares" watching is incorrect from a grammatical standpoint. It's "bears" watching. Looks like some crazy temperature changes coming up in the Denver area. Highs near 75 today, then highs near 20 on Tue. Link to comment Share on other sites More sharing options...
huronicane Posted November 9, 2014 Share Posted November 9, 2014 He was saying that "bares" watching is incorrect from a grammatical standpoint. It's "bears" watching. Link to comment Share on other sites More sharing options...
beavis1729 Posted November 9, 2014 Share Posted November 9, 2014 Ok, maybe not. Hard to tell on a message board. Anyway - looks like a cold and dry pattern shaping up outside of the upslope areas. Potentially 25-35 degrees below normal, with a reinforcing shot toward next weekend. My brother goes to DU, so the cold will be a shock on Tuesday. Link to comment Share on other sites More sharing options...
tacoman25 Posted November 9, 2014 Share Posted November 9, 2014 If the new Euro is correct, this could be a truly epic and perhaps record-breaking cold spell for this early in the season for the Mountain West/Plains. Already looking at several days with highs in the teens here in the Denver area, some snow likely with the Arctic passage tomorrow, and possibly a reinforcing shot and more chances of snow in the week ahead. Link to comment Share on other sites More sharing options...
Chinook Posted November 9, 2014 Author Share Posted November 9, 2014 I think there will be a lot of things that will bear (not referring to a large hibernating mammal) watching. Along with the single digits to teens temperatures, check this GFS "clown plot" from yesterday. The GFS and ECWMF had snow for Wed-Thurs and next weekend too. Link to comment Share on other sites More sharing options...
Chinook Posted November 9, 2014 Author Share Posted November 9, 2014 Looks like WY and MT could hit -33F. This cold outbreak is similar to Dec 4-5, 2013. Normal temperatures for this time of year Glasgow: 44/23 Billings: 49/29 Casper: 49/25 Bozeman: 50/23 Fort Collins (1981-2010 climo) 53/27.5. The period of record lowest high on 11/11 is 18, record lowest low, -7 (all for November 11th) Link to comment Share on other sites More sharing options...
boulderrr Posted November 10, 2014 Share Posted November 10, 2014 Just got our new wood burning stove installed within the last two weeks... Good timing! From Boulder, I can see the front quickly rolling south toward us. The NWS has also mentioned that it is arriving faster than anticipated: .UPDATE...ISSUED AT 803 AM MST MON NOV 10 2014FRONT IS ACCELERATING INTO COLORADO AND WILL BE A FEW HOURS FASTERTHAN FORECAST. IT HAS ALSO BECOME QUITE SHARP...TEMPERATURE ATCHEYENNE DROPPED 20 DEGREES IN THE LAST HOUR...NOW SNOWING AND 25DEGREES AND IT IS IN THE TEENS 30 MILES NORTH OF THERE. Link to comment Share on other sites More sharing options...
Chinook Posted November 10, 2014 Author Share Posted November 10, 2014 Snow and cold temperatures came in quickly here. We got a trace of snow. At 7:50AM it was 62 degrees. At 10:30AM it was 32 degrees with snow. That's a 30 degree drop in 2:40. Wind gusts maxed out at 45mph out of the northwest, at 9:30AM. Now, we have about 20mph wind gusts. Link to comment Share on other sites More sharing options...
boulderrr Posted November 10, 2014 Share Posted November 10, 2014 The graphs here show the frontal passage quite well: http://foehn.colorado.edu/weather/paos1/ Down to 40 in Boulder with the temperature dropping rapidly. Just got below freezing up in Ned. Thinking about heading up the hill early today to work from home. We still haven't switched to our snow tires yet and I'm sure the canyon will get dicey quickly. Link to comment Share on other sites More sharing options...
tacoman25 Posted November 10, 2014 Share Posted November 10, 2014 The graphs here show the frontal passage quite well: http://foehn.colorado.edu/weather/paos1/ Down to 40 in Boulder with the temperature dropping rapidly. Just got below freezing up in Ned. Thinking about heading up the hill early today to work from home. We still haven't switched to our snow tires yet and I'm sure the canyon will get dicey quickly. Dropped from 61 degrees at 8:45 am to 35 degrees at 10 am here. Now down to 22 with steady, light snow. Link to comment Share on other sites More sharing options...
boulderrr Posted November 11, 2014 Share Posted November 11, 2014 Currently 9 up here near Ned... Apparently Boulder Canyon is closed due to a 25+ car pile up including a an RTD bus and a semi truck. I'm hearing the road is covered in black ice and even 4WD vehicles are stuck. Link to comment Share on other sites More sharing options...
huronicane Posted November 11, 2014 Share Posted November 11, 2014 It should be noted that yesterday's snowfall went down as a trace at DIA. Latest Dates for First Measurable Snowfall at Denver: 1. 11/21/1934 2. 11/19/1931 3. 11/16/1894 4. 11/15/2010 -- 11/15/1988 -- 11/15/1987 -- 11/15/1902 8. 11/14/2008 -- 11/14/1964 -- 11/14/1944 11. 11/12/1910 12. 11/11/1882 At a minimum, it's now a tie for 12th latest, assuming snow actually accumulates at DIA today. Link to comment Share on other sites More sharing options...
Chinook Posted November 11, 2014 Author Share Posted November 11, 2014 We got about 1" of snow here this morning, and we got down to about 12 degrees. CoCoRAHS reports in Fort Collins as of 7AM say 0.5 to 1.2". Yesterday, we had periods of snow, but it barely accumulated. Link to comment Share on other sites More sharing options...
huronicane Posted November 11, 2014 Share Posted November 11, 2014 We only had what amounted to a dusting in Northglenn. Definitely looking forward to the first truly accumulating snowfall. Link to comment Share on other sites More sharing options...
Chinook Posted November 11, 2014 Author Share Posted November 11, 2014 Boulder Airport, 24 hour difference of 26 degrees C (46.8 degrees F) -- KBDU 111617Z AUTO 05006KT 1 3/4SM -SN BKN010 BKN016 OVC023 M08/M11 A3013 RMK AO2KBDU 101617Z AUTO 22013G19KT 10SM BKN110 18/M07 A2948 RMK AO2 -- Fort Collins-Loveland Airport, difference of 28 degrees C, (50.4 degrees F) -- KFNL 111515Z AUTO 10008KT 2SM SCT012 BKN018 BKN023 M11/M13 A3018 RMK AO1KFNL 101515Z AUTO 25016G29KT 10SM CLR 17/M03 A2948 RMK AO1--- Denver International Airport went down 50 degrees F in 24 hours --- KDEN 111644Z 07008KT 5SM -SN BKN016 OVC040 M10/M14 A3013 RMK AO2 P0000 T11001139KDEN 101626Z 31023G28KT 10SM FEW060 FEW090 FEW140 18/M07 A2949 RMK AO2 PK WND 32028/1625 T01781067 Link to comment Share on other sites More sharing options...
tacoman25 Posted November 11, 2014 Share Posted November 11, 2014 It should be noted that yesterday's snowfall went down as a trace at DIA. Latest Dates for First Measurable Snowfall at Denver: 1. 11/21/1934 2. 11/19/1931 3. 11/16/1894 4. 11/15/2010 -- 11/15/1988 -- 11/15/1987 -- 11/15/1902 8. 11/14/2008 -- 11/14/1964 -- 11/14/1944 11. 11/12/1910 12. 11/11/1882 At a minimum, it's now a tie for 12th latest, assuming snow actually accumulates at DIA today. How do they get .02 precip with temps in the teens and not get at least .1" accumulation? Maybe it was the wind. Anyway, they've been getting steadier snow with light winds today, so I'm sure they'll make it official. Link to comment Share on other sites More sharing options...
huronicane Posted November 11, 2014 Share Posted November 11, 2014 All of today's metars from KDEN have shown 0 accumulated precip. We'll see if that changes tonight when the next burst of snow is supposed to arrive (1-3"). Link to comment Share on other sites More sharing options...
boulderrr Posted November 11, 2014 Share Posted November 11, 2014 We got down to -1 this morning a bit above Nederland. The high today was 8 at 12:12PM and it is now down to 3. Been flurrying most of the day and we probably have an inch on the ground. Hoping for a few more tonight! Link to comment Share on other sites More sharing options...
Chinook Posted November 11, 2014 Author Share Posted November 11, 2014 We probably got 2" on elevated surfaces today but only about 1" on the grass. By the way, most of Alaska is now warmer than eastern Colorado. Link to comment Share on other sites More sharing options...
huronicane Posted November 12, 2014 Share Posted November 12, 2014 I had about an inch on my truck when I left work in Louisville. A little less here in Northglenn, but it is still snowing. Link to comment Share on other sites More sharing options...
tacoman25 Posted November 12, 2014 Share Posted November 12, 2014 3" on the ground at work in Boulder when I left, about 1" at home in Westminster. Radar filling in rapidly from the north, so I expect the snow will pick up in a couple hours. Link to comment Share on other sites More sharing options...
tacoman25 Posted November 12, 2014 Share Posted November 12, 2014 Tomorrow is going to set a lot of cold records in CO (not to mention across the country). Kind of ridiculous, actually. DEN is predicted to have a high of 6 tomorrow. If that occurs, it will blow away the earliest a high that cold has been seen (12/5/72). The low is predicted to be -5, which while easily a record for the day, would fall short of the coldest temp this early in the season (11/8/50 with -8). For Boulder, the high is predicted to be 7. This also would shatter the previous record cold max for this early (11/27/1919). The low is predicted to be -2, which would fall short of only 11/10/50 with -3. Link to comment Share on other sites More sharing options...
Chinook Posted November 12, 2014 Author Share Posted November 12, 2014 We have a wind chill advisory for eastern Larimer County. I hardly have ever seen that advisory here since the winds go calm when it is so cold. Today, this area spent the entire day below 17. Late December days average 42/17 at Fort Collins, so we were under the lowest average daily low.. Tomorrow should be colder. I have never experienced a high of 5 in November, here or in Ohio, or in Michigan. On 11/30/2006 it was 27/-7 at Fort Collins Christman Field, which was the coldest low temperature that has been near my town in November. Fort Collins' lowest maximum temperature on record for 11/12 was 8F on 11/12/1916. You have to go 38 years back to find a high temp <= 25 for 11/12. Link to comment Share on other sites More sharing options...
huronicane Posted November 12, 2014 Share Posted November 12, 2014 I'm just thankful I had winter 2013-2014 in Chicago to prepare me for this. 0 still doesn't feel too bad. A couple more inches of snow today and frigid temperatures. I'm ok with that. Link to comment Share on other sites More sharing options...
boulderrr Posted November 12, 2014 Share Posted November 12, 2014 -10 for a low near Ned this morning. Snow continues to fall steadily... Link to comment Share on other sites More sharing options...
tacoman25 Posted November 12, 2014 Share Posted November 12, 2014 This could realistically be the coldest November day on record for many stations when all is said and done...and it's the 12th. It looks like the snow/low clouds will move out by late afternoon or early evening, and if skies clear tonight, we could see some unprecedented low temps for so early in the season. Link to comment Share on other sites More sharing options...
huronicane Posted November 12, 2014 Share Posted November 12, 2014 -10 for a low near Ned this morning. Snow continues to fall steadily... I think what's more impressive is that you're ok with it being 60 in your house. Link to comment Share on other sites More sharing options...
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