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Pittsburgh Spring 2025


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8 hours ago, Rd9108 said:

Idk on the NWS people showed some ominous looking clouds so I wouldnt be surprised if what you saw was actually some rotation especially since the line became tornado warned just east.

Just making my way through the comments now, lots of reports / pictures of some pretty crazy stuff out of New Kensington. At least I know I wasn't seeing things lol.

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It looks like we should see our seventh day of 70+ this month today. We also have had a couple other days in the upper 60s. A 7th day would match 2012 for most through the first 19 days of March. Prior to 1990, there had never been more than 4, even including records from downtown. Can't complain. March has definitely come in as a benign lamb if you ignore the high winds and tornados.

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In addition to temperatures in the mid to upper 70s today, gusty winds and very low relative humidities will promote an enhanced risk of wildfire spread today. A Red Flag Warning has been issued for parts of the region. Enjoy the exceptional early spring weather but take care if you are going to be around any open flames today and certainly hold off of burning any brush.

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Current obs of 79/16 at PIT. 9% relative humidity. Lowest relative humidity ever observed on a 4pm obs at PIT.

IMG_9291.thumb.jpeg.dcf2f3010afa50fe6ef8c3dd1d9565d8.jpeg

If you throw out the 6% at 10am on 7/29/96, which is definitely erroneous, this is now tied for the 2nd lowest relative humidity ever observed at any hour at PIT, behind just the 6pm obs on 3/30/07. I looked at the unrounded csv file and it’s actually a hair lower than the other 9% obs.

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55 minutes ago, TheClimateChanger said:

Impressive. Wonder if we see our first 80F reading today?

Looks like we did reach 80. That hourly obs of 80/14 is now officially the lowest relative humidity ever observed at PIT (8%).

  • omg 1
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On 3/20/2025 at 8:01 AM, TheClimateChanger said:

Today might wind up as the high water mark for March temperatures. Current forecast has many days in the 40s or low 50s for the remainder of the month.

Hmm, while the statement will probably still be true, given the recent cooldown and continued cooler weather for the next several days, it now looks like there will be a pretty substantial warmup for the last few days of the month with a couple more days in the 70s looking probable.

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This month will finish up with the 5th warmest mean maximum temperature on record for the month of March at Pittsburgh. Since 1946, only 2012 had a warmer mean maximum temperature. Certainly, a generational level of warmth for the month of March.

Rank  Year  Mean Max Temperature
1     2012  62.5
2     1945  61.9
3     1946  61.8
4     1921  61.0
5     2025  59.3
6     1910  58.9
7     2016  58.1
8     1903  58.1
9     1894  57.9
10    1973  57.5
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The mean diurnal range of 24.4F for the month of March was the highest on record. The prior record was 24.1F from 2021.

Average Diurnal Range
Rank,Year,Value
1,2025,24.4
2,2021,24.1
3,1979,22.9
4,1989,22.7
5,1987,22.7
6,2003,22.5
7,2009,22.4
8,1918,22.3
9,1995,22.2
10,1955,22.2
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