North American Weather (U.S.A & Canada)

[keithlucky]

A staggering 48.3 feet of snow has fallen nearTahoe in California.

[Hotspur62]

9 hours ago, keithlucky said:

A staggering 48.3 feet of snow has fallen nearTahoe in California.

And more is on the way!In places another 3-6 feet is due over the next 72 hours!.Crikey if we get 3 inches of snow it causes chaos

[ANYWEATHER]

Looks like the snow if anything will have a slow thaw in some parts of the Sierras, dewpoints well below freezing by weeks end so the mountains of snow over the mountains will be retained....good news for slower sippage into ground aquifers, looks like a colder than normal spring for California at present. It's a shame they can't save all the water that's fell in rain or snow......❄

5 minutes ago, ANYWEATHER said:

Looks like the snow if anything will have a slow thaw in some parts of the Sierras, dewpoints well below freezing by weeks end so the mountains of snow over the mountains will be retained....good news for slower sippage into ground aquifers, looks like a colder than normal spring for California at present. It's a shame they can't save all the water that's fell in rain or snow......❄

 

[Metwatch]

 

Insane... 

[Thunders]

Hope all you guys are alright after march 31st tornado outbreak, poor Little Rock 

[Metwatch]

 

Over 20 inches of rain for Fort Lauderdale today, due to constant thunderstorms.

The city is essentially becoming submerged. More to come.

 

Edited April 13, 2023 by Metwatch

[summer blizzard]

Apparently NYC recorded 90F. 

Looks like a plume must have occured. 

[Kirkcaldy Weather]

Impressive (abnormally high for April) snow totals across Wisconsin 

 

[Metwatch]

 

 

 

[Coopsy]

The blocked weather pattern continues with continued sun and warmth and above average temperatures for most of Alberta.

Edmonton due to see more temps above 30. The mountains a rather comfortable mid 20’s. 

It’s been a fantastic start to spring after a relatively easy winter. 

The only issue is it won’t help the numerous wildfires across western Canada - with about 25 currently out of control. 

[Dorsetbred]

Wild fire smoke that has hit New York as seen from satellite.

[cheese]

 

[AnnyPl]

On 09/06/2023 at 03:16, cheese said:

 

It's terrible. My friend who lives in New York rarely goes out. The smog isn't completely gone yet, but it's easier this week.

[Sparkiee storm]

Anyone who wants to watch the current severe weather outbreak in South East US, Ryan is live now covering it with storm chasers- 

 

[Metwatch]

Snow is refusing to fully melt in California after such huge amounts back in winter and early spring.

[WeatherArc]

Not looking good for that snow, All models agreeing on a potentially extreme and long lasting heatwave to hit the desert Southwest then move over California 

GFS and Euro in very good agreement. Both also agreeing on the strength of the high at around 600dm, looks to park itself over California for an extended period. 

Extreme heat, peaking at around 49°C  but will likely breach the 50 mark in some areas. Heat not just confined to the Central Valley with temps in Yosemite and the surrounding Sierra Nevada range peaking in the mid to high 30s. Likely to see some records breached. 

Relative Humidity widely below 20% and going into single digits in some places, will likely be very conducive for fire weather. California's fire season has had a quiet start but with as the outlook i'd expect an uptick. 

Rainfall amounts going out to the end of both the Euro and GFS. 

[WeatherArc]

Update, a major heatwave in the Southwest United States will begin in a few days, a 600dm area of high pressure will track, stall and then strengthen over the region and allow for a 'heat dome' to develop

Euro and GFS have agreed on this for around a week now.

Daily highs within the California Central Valley will be in the mid 40s with some spots recording temperatures around 48-50°C, the Sierra Nevada mountain range is also likely to experience hot or very hot conditions with areas surrounding the Sierra and Stanislaus National forests as well as Yosemite and Sequoia national parks going into the mid to high 30s.

 

 

Death valley living up to its name with these temperatures  

 

 

The good side however is areas along the coast will offer relief due to the marine layer, with major urban areas such as San Francisco staying under 30 degrees. 

Relative Humidity is widely below 20% away from the coast with some spots below 5%. Wouldn't be surprised to see some red flag warnings issued by the NWS as fire weather conditions become incredibly favorable over the next week, especially when combined with any katabatic winds within the Sierra Nevada mountain range. Fire conditions may also be exacerbated due to California's wet winter and spring that has led to a high vegetation and underbrush growth rate, these will dry out quickly and will become either fuel or a fuel ladder for new start wildfires. 

Talking about wildfires, while this year has started slow with the Boulder Lake and Tunnel Five fires in Oregon being the only notable fires along the US Pacific coast I would expect an uptick as we head into late July (especially with this outlook for Cal)  the long range forecast below isn't great with an increased chance of dry thunderstorms and a dry October.

 Somehow i've spent 30 mins writing all that  but hope it's helpful for anyone in the area or just interested in NA weather.

Will update with any developments regarding heat or fires. 

Edited July 10, 2023 by WeatherArc

[matty40s]

 

[TropicThunder]

 

[WeatherArc]

Looks like the first major wildfire of the season, The Flat Fire is located in South West Oregon near the town of Agness and started yesterday. It's already shown signs of extreme fire behaviour with medium-range spotting allowing it to cross the Illinois river threatening campsites near Oak Flats.

Temperatures in the area forecast to be in the upper 20s to low 30s with relative humidity widely under 25%, the US forest service warning of rapid growth. Evacuations likely.

 

Edited July 16, 2023 by WeatherArc

[Roger J Smith]

I just wanted to mention that I have extensive historical records posted for New York City and Toronto, as well as locations in the Canadian arctic, in two separate threads in the Climate Change forum. So if you ever want to see data arranged in a similar format to the CET and EWP tables that's what you will find plus many other features such as a list of warmest and coldest readings every year (Toronto's period is 1840 to present and NYC is 1869 to present). I also have tables of extreme daily values at Providence RI 1831-1860 from Caswell's weather diary. I'm pretty sure few people know those threads are there because of the relatively low volume of traffic in and out of the climate change forum.

I also compare Toronto and NYC anomalies and find a few years where they are quite different, but much like Paris and London, they tend to run in sync most years. Toronto has only had a small handful of months (all in June or July) that were absolutely warmer than New York City. The mean differential has stayed around 3.5 C all through the warming decades. June 1919 was one month where Toronto was warmer, and the anomaly rank was vastly different, warmest on record at Toronto, bottom third all-time for NYC. July 1916 and 1921 were other months with similar outcomes. More recently, the summer of 2009 was very poor in NYC and just average for Toronto further inland away from persistent offshore lows, cloud, rain and northeast wind that plagued New York. A lot of months are very similar in anomaly ranks. I think the top ten for January involves mostly a slight shuffle of the deck. January 2023 edged out January 1932 at NYC, but finished fifth at Toronto and January 1932 retained its lead there. I have tables for raw temperature data and adjusted for increasing urban heat island (CET does the same but has only subtracted 0.2 so far, I am subtracting 1.1 from data 1981 to present, and 0.1 less for each decade moving back. The magnitude of recent warming is such that a lot of months remain near top of rankings even after that adjustment but it does place some older historical values in a better perspective. For example, July 1868 moves up to second warmest for Toronto. Its mean maximum was similar to the raw data top five, but its slightly cooler overnight lows dragged it down. Very few months from the 19th century were in the top echelons even after adjustments, the only notable warmth at Toronto would include spring 1842, summer 1854, July 1868, January 1876 and 1880, September 1881, and a growing list into the 1890s when the climate seemed to be warming at its fastest pace. 

Enjoying a more moderate summer here than some previous years, temperatures have been close to normal. In southern interior BC we have not seen much of the extensive forest fire smoke that is hanging over central BC, but some smoke blew in here from fires in WA state on Friday. That smoke has been blown out of our region today and visibility is unlimited, 32 C and low humidity, wall to wall blue skies. 

[matty40s]

How many record flood events does it take for someone in power to actually say or do something important....

 

[matty40s]

 

[matty40s]

 

[Metwatch]