MN Transplant Posted February 11, 2011 Share Posted February 11, 2011 Parshall, ND hit -60 on Feb 15th, 1936. Judging by the climo sites in central/western ND, their normal low for that time of year is probably in the upper single digits, so somewhere between a -65 and -70 departure. Link to comment Share on other sites More sharing options...
tacoman25 Posted February 11, 2011 Share Posted February 11, 2011 Parshall, ND hit -60 on Feb 15th, 1936. Judging by the climo sites in central/western ND, their normal low for that time of year is probably in the upper single digits, so somewhere between a -65 and -70 departure. Yeah, I was gonna say I'm pretty sure some places in Montana have seen -60+ departures before. Link to comment Share on other sites More sharing options...
Jebman Posted February 11, 2011 Share Posted February 11, 2011 Oklahoma got a lot of our snow. Now they got our cold too - they didn't even leave any scraps - this is one MEAN junkyard wintry dog - and all we got to enjoy is a hot spring that will arrive in DCA about a month and a half early. Link to comment Share on other sites More sharing options...
beavis1729 Posted February 14, 2011 Share Posted February 14, 2011 Good info on the extreme departures from normal. Besides the Parshall, ND number, the most impressive might be the -39F at Milligan, OH on 2/10/1899. Normal low is around 23F...implying a departure of -62. Link to comment Share on other sites More sharing options...
beavis1729 Posted February 14, 2011 Share Posted February 14, 2011 Parshall, ND hit -60 on Feb 15th, 1936. Judging by the climo sites in central/western ND, their normal low for that time of year is probably in the upper single digits, so somewhere between a -65 and -70 departure. Good info...thanks. Yeah, the normal low in Williston on 2/15 is 6F, and Minot (a bit further east) is 9F...so I'd say 7F is a reasonable middle ground. That means a departure of -67 in Parshall on 2/15/1936. That's just ridiculous. Any maps/reanalysis available from that day? Link to comment Share on other sites More sharing options...
SacrydDreamz Posted February 14, 2011 Share Posted February 14, 2011 Given how well maintained the Oklahoma Mesonet is, I think this record is likely to be verified... Link to comment Share on other sites More sharing options...
tamarack Posted February 14, 2011 Share Posted February 14, 2011 Good info...thanks. Yeah, the normal low in Williston on 2/15 is 6F, and Minot (a bit further east) is 9F...so I'd say 7F is a reasonable middle ground. That means a departure of -67 in Parshall on 2/15/1936. That's just ridiculous. Can't compete with those 60s departures, but PWM's 55 on 2/16/43 (-39/norm 16) must be tops for east coast states. That record was set within field goal distance of salt water, too. Link to comment Share on other sites More sharing options...
Eric Posted February 17, 2011 Share Posted February 17, 2011 What a difference a week makes! Link to comment Share on other sites More sharing options...
brettjrob Posted February 17, 2011 Share Posted February 17, 2011 What a difference a week makes! Yeah, several stations there had a 100-105 F range inside a 168-hour window starting last Thu AM. "Only" about 80 degrees difference from this time last week in OKC. Link to comment Share on other sites More sharing options...
UZAFrank Posted February 22, 2011 Share Posted February 22, 2011 Make that 110+ degrees if you want to tack on another 12 hours, since those areas were in the low 80s on the 17th. Link to comment Share on other sites More sharing options...
UZAFrank Posted February 22, 2011 Share Posted February 22, 2011 I've always wondered: how much of an effect does snowcover actually have, or more, does greater snowcover necessarily mean colder temp potential? I mean, is a 18" snowpack going to result in more cooling than a 6" one? Either way, everything is covered in snow pretty well... Snow for infrared wavelengths is about the closest thing to a black body you'll find. That means it absorbs IR very well, but also emits it very well, much better than things like grass, soil, pavement, trees, and houses. This is why fresh snow cover contributes to very cold temperatures on a clear and calm night. It is exceptionally good at radiating at temperatures common where it exists (a black body radiates in IR frequencies at typical surface temperatures where snow cover exists ... say, -20 F to +32 F). So, having 18 inches of snow cover will lead to more cooling than a few inches or maybe six inches. But I doubt that 24 or 30 inches would make much difference compared to 18 inches. There's probably a point where your returns diminish. I suspect it would have only been -20 to -15 in northeastern Oklahoma that morning if there was no snow cover, as opposed to -30 to -25. Link to comment Share on other sites More sharing options...
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