TheClimateChanger

Aircraft land and take off against the wind for fuel savings, so an easterly flow would have an aircraft landing and take off pattern opposite that of the typical westerly regime. For landing, it helps with braking. For takeoff, less speed is required for lift if the air is moving opposite the aircraft.

Beautiful month... a bit dry though. I would say snowfall was actually probably somewhat above normal - maybe 10 to 12 inches if measured today. They didn't inflate their snow totals like we do today either. If 4 inches fell, 4 inches was on the ground. If 1.5 inches fell, 1.5 inches was on the ground [and rounded up to 2"].

Looks like a rather dry stretch incoming for most.

Does NCEI's Climate at a Glance load for anyone? I always have trouble accessing it.

To be clear, 2024 alone is incredible. But the two-year punch of 2023 & 2024 is unlike anything in recorded history - and some locations have data going back more than 150 years. Just unreal.

Truly historic warmth in the Commonwealth. Hard to imagine anything warmer than this in western and central Pennsylvania. That 55.6F at Jefferson County Airport [1800' elev] is warmer than 11 years in Philadelphia, despite the latter being near sea level in the far southeast corner of the State and a notorious urban heat island. Harrisburg Pittsburgh *Data before 7/1935 was taken from a substantially lower elevation in the city. Erie Williamsport Scranton/Wilkes-Barre DuBois Bradford

Update through the end of September. Currently tied for first place.

Heading into the last quarter of the year. 2024 shaping up to be a very historic year on the weather front in the GL/OV. Cleveland, Ohio Columbus, Ohio Cincinnati, Ohio *Records from 1878, 1880 downtown at low elevation. 1921 from Abbe Observatory. Detroit, Michigan Indianapolis, IN South Bend, IN Lansing, MI Saginaw, MI

What happened to @TimB? Did he get banned?

At the airport. It looks like there was one instance of 17 days in the threaded record - 1908. Sounds like a reasonable figure - Detroit had 15, and Chicago 16 days that month. Still a very solid number for September. For context, 42 Augusts and 18 Julys have had 16 or fewer 80+ days at Grand Rapids.

For context, at Minneapolis, there have been 45 [of 152] Julys with 19 or fewer 80+ days, being nearly 30% of all historic Julys, and 91 [of 152] Augusts with 19 or fewer 80+ days, being nearly 60% of all historic Augusts. On the low end, July 1992 had only 3 such days and August 1912, 6. In the entire meteorological summer of 1904, there were only 19 such days. And July and August each have an extra day on September. And I get a weenie for calling September the newest summer month. Prior to 2000, the ratios are even worse. 43 [of 127] Julys, or more than 1/3 of 18th and 19th century Julys. And 79 [of 127] Augusts, or 62.2% of the time. Sorry but September increasingly holds it own against past Julys and Augusts. Is it breaking down heat records from those months? No. But it is within the historical climatology of those months.

Funny, the so-called "skeptics" [i.e., deniers] don't believe recent OBSERVED temperatures, but 100% believe some BS temperature reconstruction of 500 million years ago. What a joke!

September has been another warm month. 16th warmest in the threaded record, but only 2015, 2016 & 2018 have been warmer since 1931. Could vary a bit prior to the end of the month on Monday, but given the current forecast should finish very near the current value of 69.4F.

And actually 1921 was not particularly warm the last three months of the year. Compared to the current 1991-2020 mean at PIT, October was +0.7F, November +2.1F, and December +0.3F. So only a bit above normal. A very warm October could almost seal up the warmest year on record, barring a major cold outbreak in November or December [because at that point November & December could probably run even slightly below normal and 2024 would still wind up #1].

Also haven't looked at this in a few weeks, but PIT is now just 0.1F below the warmest YTD in the threaded record. Obviously, the older records are from the city station. And the 19th century records seem to have had some sort of warm bias on top of that, particularly in the warm season. But despite any biases, right in the mix for the record warm annual mean temperature. 1880 was not warm for the last 3 months of year so it falls off pretty rapidly. 1921 is actually the current record year in the threaded record, and 2024 has been 0.2F above that year to date.

If October, the Euro AIFS has a pretty warm looking pattern across the eastern U.S. after a cooler start to the month behind Helene. CPC agrees with increased odds of warmer than normal almost coast to coast. Not sure it will be a blowtorch, but I think odds are certainly in favor of another at least somewhat warmer than normal month.

I don't know what the weather app was looking at. There hasn't been a day within 5F of normal since the 11th. Looks like we may see a few seasonable or somewhat cooler than normal days as we head into early October, behind Helene's remnants.

September? Considering its 3.5F above normal, it's going to be closer to +5F than normal. Or was this meant to ask about the upcoming October?

Dayton has had 25 days of 90F or better temperatures this year. At the airport site, only 19 years [in 90 years of records] had more. Not a bad number. Would only be expected to be exceeded in about 1 of every 4 to 5 years based on historical records. No doubt being situated at 1,000+ feet helps keep these down. The 49 observed at Hamilton (Butler County) [elevation: 600 feet] is probably more representative of the conditions in the city of Dayton and the Miami River valley.

Similar story in Chicagoland, where the mean high temperature has been the 5th warmest in the threaded record.

September off to an absolutely scorching start in the Ohio Valley. Really living up to its billing as the new summer month. The first 22 days of the month have been warmer than the vast majority of Julys based on average high temperature! Columbus, Ohio Dayton, Ohio Threaded Record: At the airport site: Findlay, Ohio