Edmonton weather nerdery

...September 21st is the 3rd 25°C High in-a-row, which is a little uncommon in the back half of September. 2022 also had a 3 day streak, as did 2001 & 1997. https://public.tableau.com/shared/Z4466R4NJ?:display_count=n&:origin=viz_share_link

...the 2025 Building Code has Edmonton's 15min rain event as 29mm. Drainage systems are currently designed for that, although I don't know how that has changed over time. We got 22.7mm from 7:30~8PM, and then another 7.3mm after 8PM. https://climate.weather.gc.ca/climate_data/hourly_data_e.html?climate_id=3012209&Month=7&Day=10&Year=2026

...July is usually our rainiest month, averaging 88mm. And after July 10th's storm Blatchford is about halfway there. https://public.tableau.com/shared/64KKM8KJB?:display_count=n&:origin=viz_share_link

...as we get later in the year our chances of getting big storms start to drop. But we do still have a few weeks left in storm season. https://public.tableau.com/shared/4K36KSRBG?:display_count=n&:origin=viz_share_link

...August 2nd's 20.5mm was the 13th 20mm+ day of 2026. The previous record was 9 of those, from 1901. 3 or 4 in a year might be typical. https://public.tableau.com/shared/M5NDXH4K4?:display_count=n&:origin=viz_share_link

...the August 1st & 2nd rains push 2026's total up to 681.2mm. That's still Blatchford's 3rd biggest year on record. But it's just 17.8mm away from catching 2nd place 1901's 699mm. 1st place 1900 had 724.8mm, and for a stretch goal Stony Plain got to 731mm in 1980. https://public.tableau.com/shared/J6R7CSMJR?:display_count=n&:origin=viz_share_link

...for June+July we've gotten 511.6mm so far. The average is around 170mm, so we're 3x that. And the previous record was a laughable 358.9mm in 1901. https://public.tableau.com/shared/BQTKC8QXG?:display_count=n&:origin=viz_share_link

...for 2026 so far we're at 634.8mm, which is Blatchford's 5th most on record. We're 5~15mm away from the 4th & 3rd spots. And we're 90mm away from the record. (for the rest of the year we average another 150mm, and our lowest recent year was 85mm) https://public.tableau.com/shared/2GM9KRXNN?:display_count=n&:origin=viz_share_link

...July 21st's rain also pushes July up to 210.2mm. Blatchford has only ever had 6 months reach 200mm. And 2 of those were June & July 2026. https://public.tableau.com/shared/MQ5QYRX8Z?:display_count=n&:origin=viz_share_link

...and one more, just to show that we've typically got a few weeks left in summer storm season. https://public.tableau.com/shared/NQYFG6HYF?:display_count=n&:origin=viz_share_link

...for the rest of the year we average another 165mm. The typical range is 135-195mm, with the extremes from 85-270mm. Blatchford's record was 724.8mm in 1900, and we're at 602mm. So we need 122mm. At some point we'll mathematically be a lock for a new record. https://public.tableau.com/shared/CH2TD5679?:display_count=n&:origin=viz_share_link

...so in June & July we've had 269.1mm+210.2mm = 479.3mm (with more to come...). Previously the 2 biggest months in-a-row were June & July 1988: Blatchford got 157.4mm+139.9mm = 297.3mm Stony Plain got 140.8mm+185mm = 325.8mm https://public.tableau.com/shared/TMJQ73Y9Z?:display_count=n&:origin=viz_share_link

July 17th's High of 30.7°C was our warmest day of the year, and our 3rd 30°C High of 2026. #yegwx #yeg 30.7°C was our 11th warmest July 17th, and the Low of 17.8°C tied 1987 for 4th warmest. 2024 has both those records at 34°C & 19.1°C. https://public.tableau.com/shared/Y3RGCT3Q3?:display_count=n&:origin=viz_share_link

...this was Blatchford's 4th 40mm+ day of 2026 (all since June 1st), when the previous record had been 2. https://public.tableau.com/shared/D32KF24T4?:display_count=n&:origin=viz_share_link

...with big storms on both the 10th & 11th Blatchford's 2-day total (really between 8PM and 2PM) was 82mm. That's only happened 11 times before. And 1 of them was 3 weeks ago on June 20-21. #yegwx #yeg https://public.tableau.com/shared/QNG2CS7W3?:display_count=n&:origin=viz_share_link

...in June we had a few days over 32.6mm: on June 21st Stony Plain got 73mm, and Blatchford got 64mm. But those were all-day soakers, rather than a single, intense, brief storm. https://public.tableau.com/shared/78FWT6MN6?:display_count=n&:origin=viz_share_link

Charts aren't updated yet, but Blatchford got another 40mm storm last night. #yegwx #yeg That will be our 4th of the year (3 was already a record). July's total is now 139mm. And our yearly total of 531mm is Blatchford's highest since 1994 (with 5.5 months left). https://public.tableau.com/shared/9G8XWZX87?:display_count=n&:origin=viz_share_link

...so far this year we've had 36 days reach 500m3/s, which is more than a lot of years, but less than 2020's 73. 9 of those reached 1,000m3/s. Again, that's quite a bit, but 2020 had 13. https://public.tableau.com/views/NorthSaskatchewanRiverHistory/ExtremeDaysEachYear?:language=en-US&:sid=&:redirect=auth&:display_count=n&:origin=viz_share_link

RE: https://mstdn.ca/@yegwxnerdery/116987021735275546 The rain is still going, but at 2PM it's been 16.2mm, which moves July 2026 up to 258.7mm. That's only our 3rd month to ever cross the 250mm mark. It's 10.4mm away from catching last month, and 24mm away from 1901's all-time record. #yegwx #yeg

RE: https://mstdn.ca/@yegwxnerdery/116902205263710921 July 11th has had 2 storms (so far) adding another 50mm. So July's total of 96.8mm is now above average...with 3 weeks left to go. And the yearly total is up to 488mm. #yegwx #yeg

...the gap this year between Blatchford and the other stations is around 200mm, which is huge. Normally the stations are pretty close, although we've had a few 100-150mm gaps in the past. (Blatcfhford's 2005-2015 data is bad, so we'll ignore those) https://public.tableau.com/shared/SMG96D83M?:display_count=n&:origin=viz_share_link

@Chigaze@cosocial.ca Yup, I mention it just because 600m3/s is very firm cutoff, but even ~400m3/s is still on the high side.

RE: https://mstdn.ca/@yegwxnerdery/116929776791338054 Blatchford got at least another 30mm tonight, which will push its total for the year past 560mm. That's more than any year since 1978. And it's the 8th most precipitation on record (and we've still got 5 and a bit months left...) https://public.tableau.com/shared/KMYW9MNGP?:display_count=n&:origin=viz_share_link

...in July we average 90mm of precipitation. Halfway through the month Blatchford is already up to 139.4mm, which is its 15th rainiest July on record. Meanwhile the airport is down at 45.5mm. https://public.tableau.com/shared/TNRZQT5TQ?:display_count=n&:origin=viz_share_link

...Blatchford currently has 573.3mm for 2026. That's the most in a year since 1978, and the 8th most on record. (for the rest of the year we average another 175mm, which would put 2026 at a record-breaking ~750mm) #yegwx #yeg https://public.tableau.com/shared/JN3CP75T5?:display_count=n&:origin=viz_share_link

@AmeliasBrain@mstdn.ca If I didn't live downtown I would be suspicious too. But these storms have definitely been massive. I've seen stuff like this before, but those were scattered over a few decades. We've been getting one after another after another.

...and once again Blatchford's 30mm was 2x what everyone else got. The airport and Stony Plain got 10mm & 17.5mm, so their July totals are now around 100mm. https://public.tableau.com/shared/WJZX24FGJ?:display_count=n&:origin=viz_share_link

...July 25th was Blatchford's 8th 30mm+ day of 2026, all since June 1st. The previous record for a year was 6 in 1942. A typical year might get 1-3 of those storms. https://public.tableau.com/shared/6H6ZMHP3J?:display_count=n&:origin=viz_share_link

...after tonight June & July together should be close to or over 500mm. And the chart speaks for itself. https://public.tableau.com/shared/CG4W9JBDK?:display_count=n&:origin=viz_share_link

...and with all of that we've still got a few weeks left before the end of the summer storm season. https://public.tableau.com/shared/YT4NJZT6Z?:display_count=n&:origin=viz_share_link

RE: https://mstdn.ca/@yegwxnerdery/116987021735275546 At 3PM the sun is out again, and Blatchford has recorded 21mm. So July 2026 now sits at 263.5mm. That's still 5.6mm short of our-breaking June, and 19.2mm shy of 1901's all-time record. #yegwx #yeg

...in St. Albert the Sturgeon's depth is still over 2.5m. There are only 20 years of data, but that's the highest its been, especially this late in the year. https://public.tableau.com/shared/MJ3GSZTBM?:display_count=n&:origin=viz_share_link

...July 18th was also another storm. Surprise! It (plus a bit of Sunday morning) pushed July up to 181.2mm, which is our 5th rainiest July on record. The airport & Stony Plain are both down around 70mm. https://public.tableau.com/shared/7S7RZPCXD?:display_count=n&:origin=viz_share_link

...for 2026 so far Blatchford is up to 530.9mm total precipitation. That's the 18th highest year on record...and there are still 5.5 months to go. https://public.tableau.com/shared/WJ4PM7ZZK?:display_count=n&:origin=viz_share_link

...I'd forgotten to mention this, but last week July became our 3rd rainiest month on record with 212.5mm (now 242.5mm). The only months with more were the 269.1mm last month, and July 1901's 282.7mm. https://public.tableau.com/shared/488JP236W?:display_count=n&:origin=viz_share_link

...we have not had many months cross the 150mm mark. There have been 25 at Blatchford, going back to 1880. And we've never had 2 150mm months in-a-row...until June & July 2026. Together it's 450.9mm (so far), when we average around 430mm for an entire year. https://public.tableau.com/shared/2Q8ZHZ72C?:display_count=n&:origin=viz_share_link

...so far 2026 has gotten 655.8mm, which is Blatchford's 3rd most on record. The only years with more were 1901's 699mm and 1900's 724.8mm. For the rest of the year we average 147mm which would put us over 800mm (our lowest recent year had 63.4mm). https://public.tableau.com/shared/22XDW5Z9K?:display_count=n&:origin=viz_share_link

...I'd forgotten to mention this, but last week July became our 3rd rainiest month on record with 212.5mm (now 242.5mm). The only months with more were the 269.1mm last month, and July 1901's 282.7mm. https://public.tableau.com/shared/488JP236W?:display_count=n&:origin=viz_share_link

...July 11th's afternoon storm dropped 28mm in about half an hour. As we saw yesterday, the building code's design case is for that much rain in 15min. So it's a lot of water for us. https://climate.weather.gc.ca/climate_data/hourly_data_e.html?climate_id=3012209&timeframe=1&StartYear=1840&EndYear=2026&time=LST&time=LST&Year=2026&Month=7&Day=11#