Weather Chat Thread

Was curious to do one for rainfall as well, finding any extensive droughts or wet periods. Here's a graph for "the last 365 days" at the only long continuous rainfall station in Umeå.


The record wettest 365 day period ended on 1967-11-14 with 1109.8mm. I checked and there was no missing data. It was just consistently very wet, with December 1966 recording over 200mm of precipitation, and four other months recording over 100mm in 1967. I was really curious about the precipitation around the year 1988 when large swathes of Northern Sweden burnt up. Both Umeå and Sundsvall burnt to the ground on the exact same date of 1888-06-25 over 200km away from eachother. The drought period was very extensive in both its duration and intensity, and it can be seen quite clearly on the graph because from 1887-04-14 all the way to 1890-02-14 the average rainfall was just 442mm per 365 day period with a minimum of 380.7mm on for the last 365 days on 1888-09-11.
The driest 365 period was 322mm. There were 4 days that had this as the last 365 day precipitation sum, 1921-05-24 to 1921-05-27.

Here's the last 90 days and 30 days for comparison.




It's a lot harder

We've already had more than our entire annual average rainfall and sunshine with more than two and a half months of the year to go here, I don't have complete data for 11-20 so far but both are definitely going to go up in the next averages.

We've got 500 mm before October, so we are on pace to have the year with normal precipitation. While we have had below average rainfall several years this millennium, even those have clocked a rather healthy 550 mm ish rainfall. 2018 was the only with true prolonged drought conditions, with only 252 mm from Jan to Aug.

Mörbylånga station on Öland island has re-opened on Sep 1st this year after being offline since 1991. It's looking like it could be a very interesting station. Öland's Northern Edge at the northern tip is already interesting for having unusually high diurnal temperatures compared to the high mean temperatures resulting from its maritime location, with a 22.5'C average high in July for 2002-2015.

Mörbylånga seems to have even more of this combo. It's located in the mid-latitude part of the island instead of at the northernmost tip, and is closer to the mainland. Öland's Northern Edge (M) recorded 17.9/12.8, and Öland's Northern Edge (A) recoeded  18.7/12.6 this September.
Mörbylånga on the other hand managed to record  an impressive 20.0/11.0. Kalmar Airport just across the Kalmar Strait recorded 19.5/9.0, so slightly cooler highs but much cooler lows. Could this possibly translate to similar summer high temperatures in Mörbylånga as Kalmar Airport, but with warmer lows, and warmer means during fall and winter?

Speagles84 daily data for Somerset, PA you mentioned in the shoutbox. I posted but you were offline. A few sources show 3 inches of snow on June 10th and a low of 20. I see the low of 20 here, but it looks dry. Pittsburgh and Morgantown WV were also dry, so it's suspicious. The wikipedia page has no source so the source may be an old news article or book that's only in print form.

nei I found data for one place near Boston for June 1816. Lots of cool days and some snow, but also some heat. Much more variable than normal. It looks like the 6th had a high of 90, and the afternoon of the 7th was only 43 with wind and some snow (32C to 6C).


The rest of the article this is from is also interesting. Harrisburg, PA saw snow in June 1842.
www.wunderground.com/blog/weatherhistorian/late-season-snowfall-strikes-new-england-and-upstate-new-york.html

hey edmountain, how do you like the weather in Victoria so far? How does it compare to Edmonton in your experience?

I visited Edmonton for a few hours in July 2019 and it was socked-in with rain.

Why can't these idiots who write about weather have some actual knowledge about a city's climate? So Sydney has 109 clear days annually, but according to these websites we have 300-340 days? How the heck did they come up with that? It's so misleading and annoying. And according to Aussie Speciality.com "Sydney enjoys a sunny, Mediterranean-style climate all year round with more than 340 sunny days per year. "....Huh? Mediterranean? These websites should be banned for being deceptive, seriously.

www.remarkablesydneytraveltips.com/sydney-australia-weather.html#:~:text=Officially%20there%20are%20more%20than,more%20so%20in%20the%20summer.
www.aussiespecialist.com/en/sales-resources/fact-sheets-overview/weather.html#:~:text=Weather%20in%20Sydney&text=Sydney%20enjoys%20a%20sunny%2C%20Mediterranean,340%20sunny%20days%20per%20year.

As a weather nerd, this shit really triggers me. Lmao. I'm not sure if I should laugh or get mad. 

Las Vegas humid...Sydney a Mediterranean climate with 340 sunny days? Oh piss off....!