
TheClimateChanger
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Could be a little smoky around Chicago tomorrow. A pretty good batch of smoke over the Twin Cities currently, with visibilities down to as low as 3 miles at MSP. PurpleAir gauges are showing AQI generally in the 150-200 range. Should push east tomorrow, but could make its way into northern Illinois per the HRRR. On Monday, another plume of smoke reaches the Twin Cities with degraded air quality and visibility restrictions. The initial batch settles over Michigan. While total smoke particulate quantities aren't super high, the smoke that will be present will be trapped near the surface. So it should be a hazy day with somewhat degraded air quality around Detroit, Toledo and Grand Rapids.
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Hot one today in the Eastern Lakes. The high reached 93 degrees at Erie, 1 degree shy of the record set in 2005 & 1936. Cleveland officially topped off at 92 degrees, 2 shy of the record set in 1936. However, it reached 95 degrees at Burke Lakefront Airport. May have been a record if the official station was downtown as in 1936. A stout southerly, downsloping flow brought some of the warmest temperatures to the lakefront. Certainly, not cooler by the lake today!
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In between the "relentless rains," Dayton has done quite well with heat. Today was the 11th 90F+ reading of the season. Dating back to 1955 (71 years), that amount has only been exceeded through today's date (July 12) in 5 years (1966, 1988, 1994, 2012, and 2020). Through yesterday, the mean temperature was 6th highest in the threaded record. A little weird that they use the warmer, low elevation Miami Conservancy District building records for 1943 & 1944, instead of the higher elevation airport site. At the airport site, it has been the warmest since 1935, outpacing both of those years. Today's heat should help these numbers somewhat. The forecast calls for generally warm and summery weather conditions over the next several days, with highs forecast in the upper 80s tomorrow & Monday, near 90 on Tuesday and Wednesday, upper 80s Thursday, and perhaps cooling to the middle 80s by Friday.
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On the season to date, we are 0.1F below where we were last year (through yesterday). Today's warmth could bump us up. In the threaded record, that's the 11th warmest summer to date, with last year tied for 9th during the same period. But looking at the numbers, it looks safe to say it's been decidedly warmer across the board this year versus last with the exception of PIT and AGC.
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90F today, 7th of the year. This might sound a little *conspiracy hat* adjacent, but the temperatures at PIT are definitely registering cooler compared to last year. I noticed it was routinely 2-3F, maybe 4F, warmer than BTP and AFJ in the afternoons, but high temperatures have been pretty close this summer. Can really see that comparing last July to this one so far. Last year, PIT and AGC were warmest except for Connellsville Co-op site. This year, it's more in the middle of the pack. Heck, it was 2.5F warmer than the Moon Township site, whereas that site is actually 0.1F ahead of the airport this month. Is that the NWS office? PIT was 2.7F warmer than AFJ and 3.4F warmer than BTP last year, versus 1.2F and 1.8F on the month to date. July 2024 July 2025
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2025 Short Range Severe Weather Discussion
TheClimateChanger replied to Chicago Storm's topic in Lakes/Ohio Valley
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July 2025 Discussion-OBS - seasonable summer variability
TheClimateChanger replied to wdrag's topic in New York City Metro
I wonder how much some of these extremes, even in otherwise cooler summers, were aided by extreme deforestation. I think we've added something like 50-100 million acres of forest since 1920. -
Actually forecasting Code Purple for MSP metro area as well: MNZ041>045-047>070-073>078-082>085-091>093-122000- Anoka-Benton-Blue Earth-Brown-Carver-Chippewa-Chisago-Dakota- Douglas-Faribault-Freeborn-Goodhue-Hennepin-Isanti-Kanabec- Kandiyohi-Lac qui Parle-Le Sueur-Martin-McLeod-Meeker-Mille Lacs- Morrison-Nicollet-Pope-Ramsey-Redwood-Renville-Rice-Scott- Sherburne-Sibley-Stearns-Steele-Stevens-Swift-Todd-Waseca- Washington-Watonwan-Wright-Yellow Medicine- Including the Tribal Nations of Mille Lacs, Prairie Island, and Upper Sioux Including the cities of Albert Lea, Alexandria, Apple Valley, Blaine, Bloomington, Brooklyn Park, Buffalo, Burnsville, Eagan, Eden Prairie, Farmington, Hastings, Mankato, Maple Grove, Minneapolis, Minnetonka, Northfield, Plymouth, Prior Lake, Ramsey, Rogers, Rosemount, Roseville, Shakopee, St. Cloud, St. Louis Park, St. Paul, Stillwater, Waconia, White Bear Lake, and Woodbury 255 PM CDT Fri Jul 11 2025 ...AIR QUALITY ALERT IN EFFECT UNTIL 9 AM CDT MONDAY... * WHAT...The Minnesota Pollution Control Agency has issued an Air Quality Alert for fine particles pollution. The Air Quality Index (AQI) is expected to reach the Purple or Very Unhealthy category. * WHERE...Central and south central Minnesota. * WHEN...Until 9 AM CDT Monday. * IMPACTS...The risk of health effects is increased for everyone. * ADDITIONAL DETAILS...Heavy ground-level smoke from wildfires in central Canada moved into northwest Minnesota early Friday morning behind a cold front. This first band of smoke is currently impacting northern Minnesota as it moves east during the day Friday. Air quality will worsen across northeast Minnesota Friday evening as smoke arrives over the region. A second round of smoke will move into northwest Minnesota late Friday evening. This smoke will be more widespread as it moves southeast overnight, and by Saturday afternoon the entire state may be impacted. The heaviest smoke on Saturday will be across the northern half of the state. Air quality will begin to improve across western Minnesota Sunday morning as cleaner air moves in from the west. By Sunday evening, the smoke should be gone from most of the state. Another round of smoke is possible across far northern Minnesota Sunday night. PRECAUTIONARY/PREPAREDNESS ACTIONS... Sensitive groups, such as people with lung disease (including asthma), heart disease, and children and older adults, should avoid all physical activities outdoors. The general public should avoid prolonged or heavy exertion. Reduce or eliminate activities that contribute to air pollution, such as outdoor burning, and use of residential wood burning devices. Reduce vehicle trips and vehicle idling as much as possible. Keep windows closed overnight to prevent smoke from getting indoors. && For information on current air quality conditions in your area and to sign up for daily air quality forecasts and alert notifications by email, text message, phone, or the EPA AirNow mobile app, visit https://www.pca.state.mn.us/air-water-land- climate/current-air-quality-conditions. You can find additional information about health and air quality at https://www.pca.state.mn.us/air-water-land-climate/air-quality- and-health. $$ $$ Dunleavy
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2025-2026 ENSO
TheClimateChanger replied to 40/70 Benchmark's topic in Weather Forecasting and Discussion
That's what I thought. I was surprised AI suggested a tendency towards colder winters when I prompted the question, citing colder winters in the 1940s-70s coinciding with a predominantly negative PDO? -
Latest Air Quality Statement confirming likelihood of Code Purple conditions tomorrow over the Arrowhead of Minnesota. MNZ010>012-018>021-025-026-033>038-141400- 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- 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, and Hinckley 301 PM CDT Fri Jul 11 2025 ...AIR QUALITY ALERT IN EFFECT UNTIL 9 AM CDT MONDAY... * WHAT...The Minnesota Pollution Control Agency has issued an Air Quality Alert for fine particles pollution. The Air Quality Index (AQI) is expected to reach the Purple or Very Unhealthy category. * WHERE...North central and northeast Minnesota. * WHEN...Until 9 AM CDT Monday. * IMPACTS...The risk of health effects is increased for everyone. * ADDITIONAL DETAILS...Heavy ground-level smoke from wildfires in central Canada moved into northwest Minnesota early Friday morning behind a cold front. This first band of smoke is currently impacting northern Minnesota as it moves east during the day Friday. Air quality will worsen across northeast Minnesota Friday evening as smoke arrives over the region. A second round of smoke will move into northwest Minnesota late Friday evening. This smoke will be more widespread as it moves southeast overnight, and by Saturday afternoon the entire state may be impacted. The heaviest smoke on Saturday will be across the northern half of the state. Air quality will begin to improve across western Minnesota Sunday morning as cleaner air moves in from the west. By Sunday evening, the smoke should be gone from most of the state. Another round of smoke is possible across far northern Minnesota Sunday night. PRECAUTIONARY/PREPAREDNESS ACTIONS... Sensitive groups, such as people with lung disease (including asthma), heart disease, and children and older adults, should avoid all physical activities outdoors. The general public should avoid prolonged or heavy exertion. Reduce or eliminate activities that contribute to air pollution, such as outdoor burning, and use of residential wood burning devices. Reduce vehicle trips and vehicle idling as much as possible. Keep windows closed overnight to prevent smoke from getting indoors. && For information on current air quality conditions in your area and to sign up for daily air quality forecasts and alert notifications by email, text message, phone, or the EPA AirNow mobile app, visit https://www.pca.state.mn.us/air-water-land- climate/current-air- quality-conditions. You can find additional information about health and air quality at https://www.pca.state.mn.us/air-water-land-climate/air-quality- and-health. $$ Huyck
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July 2025 Discussion-OBS - seasonable summer variability
TheClimateChanger replied to wdrag's topic in New York City Metro
Looks like Central Park topped out at 97F. Much cooler than Boston with only 5 days in the 90s that month. -
July 2025 Discussion-OBS - seasonable summer variability
TheClimateChanger replied to wdrag's topic in New York City Metro
Dust storms were mostly from autumn through spring. I don't think there were many dust storms during the summer. A review of the Nebraska Monthly Weather Review for July 1936 reports only once instance of dust which lasted for a couple of hours ahead of an advancing cold front on the 19th. Looks like 1912 was an isolated stretch. 14 of the last 15 days of the month were below 80F in Boston that month, resulting in the 4th coldest stretch on record for that timeframe. -
2025-2026 ENSO
TheClimateChanger replied to 40/70 Benchmark's topic in Weather Forecasting and Discussion
Can you speculate as to implications for winter in eastern North America? -
Occasional Thoughts on Climate Change
TheClimateChanger replied to donsutherland1's topic in Climate Change
On my mind for today: -
Already seeing some of this activity in western Minnesota, with a number of these backyard Purple Air sensors registering AQIs in excess of 400. Comparing this to the modeled quantities for tomorrow, I wonder if we could see some AQI readings of 600-800 around Duluth, at least on some backyard sensors? Visibility has been as low as 1/2 mile in Grand Forks today. So that's what I mean when I say these visibility forecasts tend to be pretty conservative.
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Tomorrow afternoon looks particularly rough for northeastern Minnesota, including Duluth and International Falls, with possible Code Purple conditions and visibilities potentially dropping below a mile in dense smoke. A bunch of active wildfires in western Ontario and eastern Manitoba (close source region) look to really get their act together tomorrow and throw off tons of smoke which may converge over the region.
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Rarely see this visibility forecast register the smoke to this degree, but definitely going gung-ho on this in the western UP and northern Wisconsin, with widespread surface visibilities of 1-3 miles in dense smoke. Definitely something to keep an eye out for in Milwaukee, Chicago, Detroit, and Minneapolis. I see a lot of sunny forecasts, but those forecasts could be spoiled by this developing pall of smoke.
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Definitely looks like some hazardous air quality will be working into the Midwest over the weekend. We can see by late Saturday night, things are looking particularly dicey over the Upper Peninsula of Michigan. This spills southward across Wisconsin and Michigan during the day on Sunday.
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July 2025 Discussion-OBS - seasonable summer variability
TheClimateChanger replied to wdrag's topic in New York City Metro
I would say that area is generally less prone to high heat (100s+) than the coastal plain. It does happen, but not very frequently. Regardless, my point is just that the reading is way above any surrounding observations in the immediate vicinity. Clearly, it was a hot day either way, but that reading is obviously inflated somewhat from either instrument error or poor siting/exposure. -
July 2025 Discussion-OBS - seasonable summer variability
TheClimateChanger replied to wdrag's topic in New York City Metro
I understand that, but that doesn't explain why the Martinsburg temperatures are consistently 5F warmer than surrounding towns in that era, including on the date it "hit" a state record of 112F. On the same date, it was 103F in Hagerstown (25-minute drive) and 105F in Kearnesyville (10-ish minute drive) with no appreciable elevation difference. -
Central PA Summer 2025
TheClimateChanger replied to Voyager's topic in Upstate New York/Pennsylvania
What? It never gets above 90F on Mount Chesco! -
July 2025 Discussion-OBS - seasonable summer variability
TheClimateChanger replied to wdrag's topic in New York City Metro
You just know that user @FPizz is going to chime in with a poo emoji, and there it is! I post a very reasonable critique of a clearly bogus reading, and that's the response. I see him typing something else up, wonder what it could be? It's like an IQ test. Anyone with any knowledge of meteorology/weather knows such variance is implausible/impossible, so you have to either willfully pretend its plausible despite the physical impossibility or, well you know... -
July 2025 Discussion-OBS - seasonable summer variability
TheClimateChanger replied to wdrag's topic in New York City Metro
112F in Martinsburg, yeah, I don't believe that. It was 103F in Hagerstown and 105F in Kearneysville on the same date, right next door. Hot day, but it's not 7-9F hotter in Martinsburg than neighboring towns. More bogus nonsense, so we can hear how it was so much hotter in the past and climate change is a hoax. -
Some will say I'm making a big deal out of nothing, but if you look at all the surrounding sites, you'll see only 2010 was consistently warmer in recent years, with years like 1994 & 2024 comparable to this June, which jives with the official statewide rankings. If you looked at the DCA records, you'd think a whole slew of years in the 2010s were warmer - 2008, 2014, 2015, 2017... etc.? I mean 2014 - that was a relatively chilly summer? Not even close to 2025 anywhere else on the planet. What a joke.
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Weird. 5th warmest June on record in West Virginia, Virginia, and Delaware. 4th warmest in Maryland. But only tied for 18th warmest at DC. Yeah, ok... but, I bet we'll still have people bellyaching (hallucinating?) about supposed urban heat islands and tarmac heat islands.