beavis1729

Looks like today will end up with a 116/93 max/min in Las Vegas. The low of 93 is tied for the 6th warmest daily min on record. All of these high min records have occurred in the last 20 years, driven by UHI. Prior to 2002, no daily min above 91 was ever recorded...and mins of 90-91 only occurred 3 times. 95 (7/1/2013; 7/19/2005) 94 (7/12/2020; 7/29/2016; 7/20/2005) 93 (today and 5 other days, all since 2005) The daily average temp of 104.5 is tied for the 2nd highest daily mean temp since 1937. The only higher daily mean temp since 1937 was 7/19/2005 (106.0). That day was actually the hottest day in LV history based on daily average temp - 117/95 max/min.

Note that Furnace Creek is where the official obs are taken for Death Valley. That’s not quite as low elevation as the point & click forecast above. NWS going with 129 on both Sat and Sun for Furnace Creek. What’s interesting to me is there will be some humidity…so overnight mins could be extreme. I could see low temps around 105 over the weekend; could be all-time high mins?

Should be interesting to follow the temps later this week, and to see how high the daily mins will be too (the air isn't as dry as it is during May/June). It stayed above 100 overnight last night, and may do so for the next several nights...yikes. Currently 122/46/115 at Furnace Creek.

I thought the world record temp was 134.1F (56.7C) at Furnace Creek on 7/10/1913. This replaced the previous "record" of 136F in Aziziya, Libya on 9/13/1922, which was invalidated by the WMO in 2012. I know the 134.1F temp is not believed by some, which is understandable...but the WMO currently lists it as the world record. The WMO was quoted as follows: "We accept this Death Valley temperature extreme record. Obviously, if any new materials on it surface, we will be prepared to open an investigation, but at this time all available evidence points to its legitimacy." Anyway - the current NWS forecast for Death Valley (Furnace Creek) shows a max temp of 128 over the next 7 days. I agree they may be playing it a bit conservatively, as it's 5 days out. I think 129 is possible, not sure about 130+. Wednesday: Sunny and hot, with a high near 125. South wind 6 to 10 mph.Wednesday Night: Mostly clear, with a low around 100. Southeast wind 5 to 11 mph.Thursday: Sunny and hot, with a high near 125. South wind 7 to 15 mph, with gusts as high as 21 mph.Thursday Night: Mostly clear, with a low around 99.Friday: Sunny and hot, with a high near 125.Friday Night: Mostly clear, with a low around 100.Saturday: Sunny and hot, with a high near 127.Saturday Night: Mostly clear, with a low around 101.Sunday: Sunny and hot, with a high near 128.Sunday Night: Partly cloudy, with a low around 102.Monday: Sunny and hot, with a high near 127.

Looks like Salem (definitely located in OR) hit 117 before winds shifted to the W and the temp crashed to 85 by 7pm local time.

Yeah…and Portland’s low of 76 this morning broke the all-time warmest daily min temp of 74, set sometime in 2009. Still 113 at 7pm local time, just crazy. And this isn’t a very dry heat either. At 3pm it was 115/54, heat index 114.

Portland OR hit 112 today, was 110+ for 5 consecutive hourly obs. Previous all time high was 108 (set yesterday). Record before that was 107.

Right, although it’s surprisingly warm there in the summer. July normals are 89/56. All time high is 114 on 7/26/1928, June monthly high is 110.

Forecast for Omak, WA…this is insane: NWS Forecast for: Omak WA Issued by: National Weather Service Spokane, WA Last Update: 3:53 pm PDT Jun 24, 2021 Excessive Heat Warning Tonight: Partly cloudy, with a low around 67. North wind 8 to 14 mph. Friday: Sunny and hot, with a high near 101. Breezy, with a north wind 13 to 18 mph. Friday Night: Mostly clear, with a low around 70. North wind 5 to 10 mph becoming light. Winds could gust as high as 20 mph. Saturday: Sunny and hot, with a high near 106. North wind 5 to 7 mph becoming light and variable in the afternoon. Saturday Night: Clear, with a low around 74. North wind 3 to 5 mph. Sunday: Sunny and hot, with a high near 109. Sunday Night: Clear, with a low around 74. Monday: Sunny and hot, with a high near 112. Monday Night: Clear, with a low around 76. Tuesday: Sunny and hot, with a high near 112. Tuesday Night: Clear, with a low around 75. Wednesday: Sunny and hot, with a high near 110. Wednesday Night: Mostly clear, with a low around 72. Thursday: Sunny and hot, with a high near 110.

Wow, that would be historic. I’ve seen dews in the 30s here in early June, but a dew under 40 beyond June 15th is very rare. 20s would be insane. I wonder what dews were like here during the droughts of the 1930s.

Good to hear - I’ve noticed that PWK’s temps seem to be more realistic over the past few weeks.

I could be wrong, but this doesn't seem realistic for RFD. There wasn't a ton of wind/mixing that would support such a high temp, given the background airmass. Seems to be a sensor issue or unusual UHI impacts?? When I say "sensor issue", it could be the sensor itself malfunctioning, or that the sensor is located in a spot which leads to a higher temp when the surface is parched (which shouldn't happen, as it's a hyper-local impact which isn't representative of the area). I know it has been dry there...but it has been just as dry IMBY, and only hit 90 today (which was an overperformer itself). Strange...

The UHI at MSP is ridiculous. At first I thought it mostly occurred in the winter due to more lower albedo, less radiational cooling over snow cover, etc. But it’s just as bad in the summer. St. Cloud, a bit north of MSP and much more rural, had a low of 70. It’s reasonable if UHI adds 2-3 degrees, but not 8. It’s a major problem that needs to be addressed by all of us, led by urban planners and engineers.

And INL hit 98, their first 90+ temp in June since 2005 and a new daily record high (old record 92 in 1988). All-time high is 103, June monthly high is 101. Records since 1897.

Grand Forks had an overnight low of 58, already up to 90 at 10 am.

^ Is that map relative to the new 1991-2020 normals? Would be interesting to see the same map, but vs. the 1961-1990 normals instead. In some areas, 1991-2020 is 2-4F higher than 1961-1990, due to a combination of background warming and UHI. I think the purples would become greens, and the greens would become yellows (in most areas).

And JVL had a low of 50 this morning...nice 40-degree diurnal range with the dry air. Current dew is 37, RH 16%.

Didn’t get as cold as the airmass could have enabled overnight, as the clouds held on for quite awhile. FEP, being very rural and having a longer period of clear skies, dropped to 33. DKB hit 35, and 39 here. Most of N IL was 37-41.

Ha...mostly just the drizzle and wind combined with the temps. Partly cloudy and 45 would be great.

Although I have to admit that 45F and drizzle at peak heating on May 28th isn’t so good. Seasons in seasons...

Wow...18F on May 28th.

Coldest low temps in MN this morning: Hibbing 21 Ely 23 Orr 23 Bemidji 24 INL 24 - new daily record (old record 27 in 1947)

And Marshfield isn't even in far northern WI; it's 44.67N. Light snow (1.75 mile vis), and 33/30 at 6 am. Area Forecast Discussion National Weather Service Green Bay WI 702 AM CDT Fri May 28 2021 Updated aviation portion for 12Z TAF issuance .SHORT TERM...Today...Tonight...and Saturday Issued at 405 AM CDT Fri May 28 2021 Scattered light rain across central and east central Wisconsin will end this morning as the upper low exits the southern part of the state. A little snow may mix in across central Wisconsin. Clearing skies are expected during the day as drier air advects in from the 1030 mb surface high centered over Lake Superior. Highs today will be much warmer than yesterday, but still about 15 to 20 degrees below normal for this time of the year. The computer models forecast the surface high to move into Wisconsin tonight, as a sharp upper ridge approaches from Minnesota. Clear skies, diminishing winds and very dry air are all favorable for temperatures to fall quickly tonight. In fact the precipitable water values forecast for tonight are near the all time lows for late May in the last 70 years of record keeping. Lows in the 20s are a good bet west of an Iron Mountain to Wausau line. Further east it will be in the low to mid 30s. Areas near the lake and bay may escape a frost or freeze but the remainder of the area looks likely to receive one. Record low temperatures are likely in a few places.

This is probably close to the coldest temps on record for so late in the season. The point forecast for INL is calling for an overnight low of 21. URGENT - WEATHER MESSAGE National Weather Service Duluth MN 322 PM CDT Thu May 27 2021 MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-280830- /O.CON.KDLH.FZ.W.0001.210528T0300Z-210528T1400Z/ Koochiching-North St. Louis-Northern Cook and Lake-North Itasca- Central St. Louis-Southern Lake-Southern Cook-North Cass- South Itasca-South Cass-Crow Wing-Northern Aitkin-South Aitkin- Carlton and South St. Louis-Pine-Douglas-Bayfield-Ashland-Iron- Burnett-Washburn-Sawyer-Price- Including the cities of International Falls, Ely, Isabella, Bigfork, Hibbing, Two Harbors, Silver Bay, Grand Marais, Walker, Grand Rapids, Pine River, Brainerd, Hill City, Aitkin, Duluth, Pine City, Hinckley, Superior, Washburn, Bayfield, Ashland, Hurley, Grantsburg, Spooner, Hayward, and Phillips 322 PM CDT Thu May 27 2021 ...FREEZE WARNING REMAINS IN EFFECT FROM 10 PM THIS EVENING TO 9 AM CDT FRIDAY... * WHAT...Sub-freezing temperatures as low as 20 expected. * WHERE...Northern Cook and Lake, Koochiching, Southern Cook, North St. Louis, North Itasca and Central St. Louis Counties. This includes the Tribal Lands of the Grand Portage Reservation and the Bois Forte Band, Deer Creek, Lake Vermilion and, Nett Lake areas. * WHEN...From 10 PM this evening to 9 AM CDT Friday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.