TheClimateChanger

I guess, but even Blue Hill Observatory in eastern Massachusetts (high quality, long POR) has this as 3rd hottest start to summer behind only 2024 & 1999.

The map I posted previously was exclusively ThreadEx sites with PORs 100-150+ years. I just used Mount Washington as an illustrative example. CON has a longer POR than BOS and is top 5.

I just want the correct numbers. Love it, or hate it, Boston is the place the local weatherperson will use for verification purposes. Local farmers and utility operators need the correct data. If it is local sea breezes keeping it cooler, then it shouldn't be given any special significance. I mean just look at, say, Mount Washington. Population literally zero. You get a completely different look.

Even ORH with a huge site discontinuity (elevation gain) is in 14th place, while Boston is 23rd place (and tied with 2 other years). And pretty much everywhere else is well in the top ten. Makes no sense... wonder if someone could sneak a thermometer in there to verify? Anyone that keeps personal records - are you seeing this summer as cooler than a number of recent years like the official tally at Logan Airport, or is this one of your hottest?

Good post. Warmer air holds more moisture. Doesn't mean it will fall as rain but certainly supercharges any storm that can tap into that moisture. Just anecdotally, total precipitation locally hasn't been super crazy. But there have been a number of flash flood events around the region with some of these heavy, slow-moving thunderstorms.

Wow! Can't wait to see what this looks like at the end of the week. One thing I find odd the rankings in some of the biggest cities aren't as impressive: Boston (23), New York - Central Park (15), DC (11). The hottest anomalies seem to be in places where nobody lives, like Elkins and Clarksburg, W. Va. (both 1st place). The UHI theory would predict the opposite? Not sure what is going on there. It seems some of these radiational cooling hotspots are just not radiating like they used. This very dense, vaporous atmosphere is wreaking havoc on overnight cooling. Much denser and vaporous than when I was a child.

Morning thoughts:

This is A LOT of territory seeing a top 10 hottest summer, even top 5 hottest in many locations. These are only showing long term ThreadEx sites. Wow! You can definitely see West Virginia has been ground zero for the heat this season.

Zooming in over Baltimore and Washington. In the official Baltimore thread, 2025 currently sits in 8th place. I do question the thought process of grafting on some of these rooftop Customs House readings, rather than including them in the downtown Baltimore thread. Speaking of downtown, currently in 2nd place (since 1950). IAD is checking in at 4th place summer to date. DCA is mired in an unimpressive 11th place. In fact, according to these rankings, 8 summers had as warm or warmer start just since 2010. Richmond, Virginia currently sits in 6th place, tied with 2008.

Very impressive heat across the region so far this summer. As we approach the midpoint of summer, it's clear 2025 has not disappointed for summer weather lovers. Back-to-back scorchers areawide. Might never see such extremes in two consecutive summers ever again... certainly, an impressive statistical anomaly! Some notable observations: Elkins, West Virginia has had its warmest start to summer on record, by a large margin, with 2024 dropping into 4th place. Hagerstown, Maryland has seen its 3rd warmest start to the season, behind 2010 & 2024. What a 1-2 punch with back to back scorchers in 2024 & 2025. Roanoke, Virginia has seen its 4th warmest start to the season, behind 2024, 2010 & 1925. Clarksburg, West Virginia has seen its 2nd warmest start to summer, behind only 1934's Dust Bowl aided heat. 3rd warmest at Huntington, W. Va. Easily the hottest at the current airport location. 2nd warmest at Beckley, W. Va., with 2024 in a close third.

At this rate, might not even drop below 64F.

Wow, very impressive. All of the higher streaks of my graphic are from downtown. Up to 22 days now. Today will certainly bring this up to 23 days, and the current forecast would suggest it reaches at least 29 days.

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.

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!

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.

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.

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

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

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

Looks like Central Park topped out at 97F. Much cooler than Boston with only 5 days in the 90s that month.