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Remembering the Johnstown Flood – May 31, 1889 It seems like May 31st is a cursed weather date here in Pennsylvania with tornado outbreaks and dam breaks! 136 years ago today, one of the deadliest natural disasters in U.S. history struck Pennsylvania. On May 31, 1889, the South Fork Dam collapsed after days of relentless rain, unleashing 20 million tons of water from Lake Conemaugh into the Conemaugh Valley—and straight into the heart of Johnstown. In a matter of minutes, a wall of water 35 feet high raced downstream at speeds of up to 40 miles per hour, destroying everything in its path—homes, bridges, trains, factories, and entire neighborhoods. Over 2,200 people lost their lives, including entire families, and more than 700 were never identified. The Johnstown Flood was not just a tragedy—it was also a turning point in American history. It prompted a nationwide outpouring of aid and led to major changes in dam safety regulations and emergency response planning. The American Red Cross, under Clara Barton, responded to its first major disaster here.

Sweet! ...Make Kevin NYC thread's problem -

PA Weather Plus, LLC · Follow · 41 Years Ago Today: The May 31, 1985 Tornado Outbreak Today, we pause to remember one of the most catastrophic severe weather events in Pennsylvania’s history. On May 31, 1985, a violent tornado outbreak swept across Ohio, Pennsylvania, New York, and Ontario. It was the largest and deadliest tornado outbreak ever recorded in Pennsylvania, with 21 tornadoes touching down in the state and 65 lives lost here alone. It led to the state's first and only F5 tornado. This violent tornado came out of eastern Ohio, devastating the community of Wheatland with winds over 300mph. Over 95% of Wheatland's trucking and steel industries were destroyed in the tornado. Another long-track F4 tornado tore through the Moshannon State Forest for 69 miles, destroying a total of 88,000 trees! With thousands of large trees falling at once, it set off seismographs at Penn State! This day remains the state's deadliest tornado day and it the outbreak alone destroyed over 1,000 homes. This outbreak caused over $600 million in property damage, which would be equivalent to $1.72 billion in 2025. Pictured in this post is the F5 tornado that tore through Niles, Ohio and entered into Mercer County minutes after. Photo credit to Mike Zahurak.

June DCA _ NYC _ BOS _ ORD _ ATL _ IAH _ DEN _ PHX _ SEA 1.7 1.6 1.6 2.5 0.7 0.1 2.7 2.3 1.4

CPC continuing to go with El Nino jet stream

Looking beyond days 8 to 14

DCA _ NYC _ BOS _ ORD _ ATL _ IAH _ DEN _ PHX _ SEA 0.7 0.9 1.1 1.3 0.8 0.2 1.1 1.7 -0.2 99 99 98 102 101 106 97 119 95

I even take normal.

https://x.com/webberweather/status/2061163954496237618 Eric Webb @webberweather This is probably the biggest Pacific Jet extension I’ve ever seen in June & it isn’t surprising to see as we discussed several days ago. Buckle up… Eric Webb @webberweather All the ingredients are there for a gigantic Pacific Jet extension later in week 2 & 3, which should lead to a more favorable pattern for tornadoes by mid-June: Kara Sea ridge >> East Asia cold shot Mei-Yu front south of Japan Pacific MJO event Developing Super El Niño

Nashua actually can be a great area for tstms. In the very active year and hot summer of 1988, Nashua had 15 thunder days in July, and 43 total for the year. Those are numbers near the absolute max, at least for southern NH into central/eastern MA!

Yes, I mentioned "embedded convective elements."

Guess I didn’t need to stop doing yard work. Meteorological pit.

The temperature surged into the lower 70s before clouds rolled in. Four photos from the New York Botanical Garden:

Not all virga. Just had a brief shower pass through down here in SE CT. I'm sure NE CT and RI are gettin' wet right now.

Looks to be a delicious, magnificent and healthy presentation Mrs J. I remember my late spouse taking basic ingredients and turning them into, by my eye/palate, a work of art. Well done! As always …..

42F low this am

Well's role is a bit unclear. He certainly did suck today.

El Nino is starting up.

Beautiful morning but the clouds have found their way here.

May finishes with a -13.22 SOI Since Apr 2016: Top -SOI Months (out of 121 Total months): 1. Feb 24: -15.55 2. May 23: -15.26 3. Feb 19: -14.62 4. Sept 23: -13.87 5. May 26: -13.22 6. Sept 19: -12.72 April-May finishes with a -23.10 SOI Since Apr 2016: Top -SOI 2-Months: 1. Aug-Sept 24: -24.72 2. Apr-May 26: -23.10 3. Feb-Mar 19: -21.10 All others above -20

Sounds like a CoastalWx attitude!

More lightning north of Sherbrooke this afternoon than I’ll see all summer

Virga plume ahead of the upper low w/ embedded convective elements. A little odd for an upper low dropping from the N. Nice spiral in Quebec w/ decent tstms. Maybe Scott can get some rumblers in Ossipee!?!

You're the one who asked for it.