IbrChris Posted October 28, 2019 Author Report Share Posted October 28, 2019 32 degree rise in 15 minutes this morning (7:30 to 7:45 am)...-28 to 4 degrees (mean temp -16.6) Quote The Pacific Northwest: Where storms go to die. Link to comment Share on other sites More sharing options...
wx_statman Posted October 28, 2019 Report Share Posted October 28, 2019 Looks like Randolph tied their monthly record low this morning (-1 from 1991). 1 Quote Link to comment Share on other sites More sharing options...
Anti Marine Layer Posted October 29, 2019 Report Share Posted October 29, 2019 32 degree rise in 15 minutes this morning (7:30 to 7:45 am)...-28 to 4 degrees (mean temp -16.6)Extremely bone chilling to not quite as extremely bone chilling in a short amount of time. Quote Link to comment Share on other sites More sharing options...
Scott Posted October 29, 2019 Report Share Posted October 29, 2019 List of largest diurnal ranges at Peter Sinks (2010-2019): 74 degrees (28/-46) on 2/22/201073 degrees (39/-34) on 3/5/201372 degrees (41/-31) on 12/3/201770 degrees (35/-35) on 3/20/201068 degrees (47/-21) on 12/2/201768 degrees (25/-43) on 12/5/201668 degrees (47/-21) on 10/28/201067 degrees (36/-31) on 2/24/201567 degrees (41/-26) on 11/23/201567 degrees (18/-49) on 2/2/201166 degrees (24/-42) on 12/7/201766 degrees (42/-24) on 12/4/201766 degrees (24/-42) on 12/8/201666 degrees (35/-31) on 3/12/201465 degrees (34/-31) on 3/7/201865 degrees (37/-28) on 2/13/201765 degrees (36/-29) on 3/19/201665 degrees (28/-27) on 11/22/201565 degrees (37/-28) on 2/8/2010 Interestingly, there are a lot of places that have large diurnal changes in Utah, but in all those places it's the opposite season that has them. November through March is the least likely time to have a huge dirunal change everywhere in Utah except Peter Sinks it seems. Quote Link to comment Share on other sites More sharing options...
Scott Posted October 29, 2019 Report Share Posted October 29, 2019 It's noteworthy that Rawlins, WY fell to -16 this morning, likely the coldest ASOS temp in October in years.Apparently they made it down to -18. Look how much the old record was beaten by. 1 Quote Link to comment Share on other sites More sharing options...
IbrChris Posted October 29, 2019 Author Report Share Posted October 29, 2019 Interestingly, there are a lot of places that have large diurnal changes in Utah, but in all those places it's the opposite season that has them. November through March is the least likely time to have a huge dirunal change everywhere in Utah except Peter Sinks it seems.Peter Sinks can still post some 60-ish degree diurnal swings in summer too. It has to do with the winds going calm allowing for a decoupling between the sink bottom and the rim. This decoupling can produce a 30-40 degree temp gradient over about a 300' elevation change. In summer the nights are shorter and hence the strength of the cold pool isn't as pronounced as winter when you have longer nights and snowcover. 1 Quote The Pacific Northwest: Where storms go to die. Link to comment Share on other sites More sharing options...
Scott Posted October 30, 2019 Report Share Posted October 30, 2019 -40 at midnight for Peter Sinks. It's a stretch, but if the temperature drops below -48 it will break Alaska's October record. Quote Link to comment Share on other sites More sharing options...
Scott Posted October 30, 2019 Report Share Posted October 30, 2019 It appears the low was -44. Since the temperature is currently rising, it probably won't get lower than that this morning. Quote Link to comment Share on other sites More sharing options...
wx_statman Posted October 30, 2019 Report Share Posted October 30, 2019 It appears the low was -44. Since the temperature is currently rising, it probably won't get lower than that this morning. I'm wondering if a new monthly record was set in Wyoming as well. Big Piney dropped to -26 this morning, also -25 at Old Faithful. RAWS and Snotel readings will be interesting to look at from this morning. Quote Link to comment Share on other sites More sharing options...
Scott Posted October 30, 2019 Report Share Posted October 30, 2019 I'm wondering if a new monthly record was set in Wyoming as well. Big Piney dropped to -26 this morning, also -25 at Old Faithful. RAWS and Snotel readings will be interesting to look at from this morning.Too bad the West Yellowstone MT station is no longer operating. I wonder how cold it was there? Quote Link to comment Share on other sites More sharing options...
Scott Posted October 30, 2019 Report Share Posted October 30, 2019 It's noteworthy that Rawlins, WY fell to -16 this morning, likely the coldest ASOS temp in October in years.Rawlins is currently -20 and dropping. Quote Link to comment Share on other sites More sharing options...
wx_statman Posted October 30, 2019 Report Share Posted October 30, 2019 Too bad the West Yellowstone MT station is no longer operating. I wonder how cold it was there? Well, the airport at West Yellowstone has dropped to -18 so far this morning. Looks like the monthly record at the old COOP was -20 from 1971... Quote Link to comment Share on other sites More sharing options...
Scott Posted October 30, 2019 Report Share Posted October 30, 2019 I'm wondering if a new monthly record was set in Wyoming as well.Possibly Colorado as well? Craig got down to at least -9 and Walden to at least -13, so there might be a -20 out there somewhere. I wonder what Maybell was? Can't find the current temp online. Quote Link to comment Share on other sites More sharing options...
IbrChris Posted October 30, 2019 Author Report Share Posted October 30, 2019 -23 at Randolph, UT (coldest ever at an inhabited place in Utah)-26 at Keystone, WY-25 at Foxpark, WY-33 at Rock River, WY (UPR station...may be inaccurate but within realm of possibility given the -20 at Rawlins ASOS). 1 Quote The Pacific Northwest: Where storms go to die. Link to comment Share on other sites More sharing options...
wx_statman Posted October 30, 2019 Report Share Posted October 30, 2019 Possibly Colorado as well? Craig got down to at least -9 and Walden to at least -13, so there might be a -20 out there somewhere. I wonder what Maybell was? Can't find the current temp online. -17 at a CWOP station in Hebron...coldest I've seen so far this morning in Colorado. Definitely could have been a -20 reading somewhere. Quote Link to comment Share on other sites More sharing options...
wx_statman Posted October 30, 2019 Report Share Posted October 30, 2019 Even Zion NP - in the banana belt of Utah where the October average is 78/49 - fell to 13 degrees this morning. Previous monthly record was 17 in 1971. Quote Link to comment Share on other sites More sharing options...
Omegaraptor Posted October 30, 2019 Report Share Posted October 30, 2019 -18F at Island Park, Idaho this morning. This may be the coldest October temperature ever recorded in Idaho. Quote Link to comment Share on other sites More sharing options...
Scott Posted October 30, 2019 Report Share Posted October 30, 2019 -17 at a CWOP station in Hebron...coldest I've seen so far this morning in Colorado. Definitely could have been a -20 reading somewhere. Just got to work on a project north of Craig. It is currently sitting at -11 just after 10 AM. I assume it was colder at sunrise. 1 Quote Link to comment Share on other sites More sharing options...
wx_statman Posted October 30, 2019 Report Share Posted October 30, 2019 I'm wondering if a new monthly record was set in Wyoming as well. Big Piney dropped to -26 this morning, also -25 at Old Faithful. RAWS and Snotel readings will be interesting to look at from this morning. Looks like the Old Faithful COOP bumped down to -27 this morning. The previous monthly record low was -11. 1 Quote Link to comment Share on other sites More sharing options...
wx_statman Posted October 30, 2019 Report Share Posted October 30, 2019 Here's the list of coldest official station October minimums for Wyoming as it appears right now: -33 at Soda Butte (10/29/1917)-29 at Saratoga (10/30/2019)-27 at Old Faithful (10/30/2019)-26 at South Pass City (10/31/1935) 2 Quote Link to comment Share on other sites More sharing options...
wx_statman Posted October 31, 2019 Report Share Posted October 31, 2019 Two unofficial stations in Wyoming tied the state October record low (and the previous official lower 48 record low for October) - the -33 reading at Soda Butte in 1917. This morning, -33 was observed at a Union Pacific weather station (UR345) and a Wyoming DOT station (WY56), both part of the MesoWest network. 1 Quote Link to comment Share on other sites More sharing options...
wx_statman Posted October 31, 2019 Report Share Posted October 31, 2019 Possibly Colorado as well? Craig got down to at least -9 and Walden to at least -13, so there might be a -20 out there somewhere. I wonder what Maybell was? Can't find the current temp online. Found one. -21 at a CoAgMet station in Jefferson. So, both Colorado and Utah had unofficial stations that broke the previous state record lows for October. 1 Quote Link to comment Share on other sites More sharing options...
Scott Posted October 31, 2019 Report Share Posted October 31, 2019 Here's the list of coldest official station October minimums for Wyoming as it appears right now: -33 at Soda Butte (10/29/1917)-29 at Saratoga (10/30/2019)-27 at Old Faithful (10/30/2019)-26 at South Pass City (10/31/1935) Big Piney was also -26 this morning. 1 Quote Link to comment Share on other sites More sharing options...
Scott Posted October 31, 2019 Report Share Posted October 31, 2019 -23 at Randolph, UT (coldest ever at an inhabited place in Utah) Of note, the November record low for Randolph is -21. 2 Quote Link to comment Share on other sites More sharing options...
IbrChris Posted October 31, 2019 Author Report Share Posted October 31, 2019 Here's the list of coldest official station October minimums for Wyoming as it appears right now: -33 at Soda Butte (10/29/1917)-29 at Saratoga (10/30/2019)-27 at Old Faithful (10/30/2019)-26 at South Pass City (10/31/1935)This is what I have: -33 Soda Butte (YNP) 10/29/1917-29 Old Faithful Lodge (YNP) 10/30/2019-29 Saratoga 4 N 10/30/2019-27 Lake Yellowstone (YNP) 10/29/1917-26 Big Piney Ap 10/30/2019-26 Encampment 10/30/2019-26 Keystone 10/30/2019-26 Nugget Canyon 10/30/2019-26 Sweetwater Station 4 SW 10/30/2019-26 Recluse 14 NNW 10/30/1991 1 Quote The Pacific Northwest: Where storms go to die. Link to comment Share on other sites More sharing options...
IbrChris Posted October 31, 2019 Author Report Share Posted October 31, 2019 Two unofficial stations in Wyoming tied the state October record low (and the previous official lower 48 record low for October) - the -33 reading at Soda Butte in 1917. This morning, -33 was observed at a Union Pacific weather station (UR345) and a Wyoming DOT station (WY56), both part of the MesoWest network. Not buying the Rock River reading (UR345) after seeing their high temp the day prior was around -14. I took a look at all the surrounding stations and there seems to be a cold bias at Rock River. Quote The Pacific Northwest: Where storms go to die. Link to comment Share on other sites More sharing options...
wx_statman Posted October 31, 2019 Report Share Posted October 31, 2019 Not buying the Rock River reading (UR345) after seeing their high temp the day prior was around -14. I took a look at all the surrounding stations and there seems to be a cold bias at Rock River. Interesting info, thanks for looking into it. There's probably a good reason why transportation wx stations (DOT or railroad) aren't considered official. 1 Quote Link to comment Share on other sites More sharing options...
IbrChris Posted November 2, 2019 Author Report Share Posted November 2, 2019 Interesting info, thanks for looking into it. There's probably a good reason why transportation wx stations (DOT or railroad) aren't considered official.Which is funny cause Prospect Creek, Alaska was a DOT station iirc. -80 there is the national cold record. 2 Quote The Pacific Northwest: Where storms go to die. Link to comment Share on other sites More sharing options...
wx_statman Posted November 3, 2019 Report Share Posted November 3, 2019 Apparently, the COOP at Daniel Fish Hatchery in Wyoming hit -34. This would be the new official state record for WY for October. Any thoughts on this reading, Chris or Scott? It seems probable. This station averages a minimum of -4 in January so it is a very cold location. 1 Quote Link to comment Share on other sites More sharing options...
Scott Posted November 4, 2019 Report Share Posted November 4, 2019 Apparently, the COOP at Daniel Fish Hatchery in Wyoming hit -34. This would be the new official state record for WY for October. Any thoughts on this reading, Chris or Scott? It seems probable. This station averages a minimum of -4 in January so it is a very cold location. It does seem a bit cold for the location (nearby Big Piney is usually colder and hit "only" -26), but it could be possible. If it is valid, the reading is incredible and is almost as cold as January's record. Quote Link to comment Share on other sites More sharing options...
wx_statman Posted November 5, 2019 Report Share Posted November 5, 2019 It does seem a bit cold for the location (nearby Big Piney is usually colder and hit "only" -26), but it could be possible. If it is valid, the reading is incredible and is almost as cold as January's record. To be fair, this station has only existed since 1989 and January has been a stinker in the current era. This station hit -50 on 12/22/1990 - I am sure January has seen -50 at that location in past decades... Quote Link to comment Share on other sites More sharing options...
Scott Posted September 6, 2021 Report Share Posted September 6, 2021 I "accidentally" found a cold air sink last night/this morning; this time in a sink east of Twin Lakes in the Flat Tops Wilderness of Colorado. I set up the tent in the sink it case it got windy since there was only sparse tree cover around and the only other group at the lake took the campsite with tree shelter. The elevation of the campsite was ~11,030 feet. I took a recording min/max themometer. When I went to bed, it was 23F. By midnight it had dropped to 14F and the overnight low was 6F. That's pretty cold considering the temperature wasn't recorded during a cold snap and that it is early September. I wonder what the winter temperatures would be there? 2 1 Quote Link to comment Share on other sites More sharing options...
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