GaWx

Thanks! 1. Based on the graph, June WCS PDO calculated to be ~-1.8. Based on recent relationships between WCS and NOAA, I had said that that likely meant the June NOAA PDO was likely down to the -2.5 to -2.9 range. So, the -2.51 jibes with my expectations. 2. The unrounded AMJ ONI is -0.11. That means RONI minus ONI, -0.38, has narrowed even more. It was -0.43 in MAM, -0.49 in FMA, -0.51 in JFM, and -0.53 in DJF.

That’s consistent with this in the upper 300 meters within 180-100W:

Lots of heavy thunderstorms in the area, including right here on one of the islands that I’m visiting. Plentiful CTG lightning. Storming at my place, too, per radar. First rain of significance since way back on 6/18!

The 30 mb June QBO dipped to -13.72 from -4.59 in May. This is following most closely the 2014 progression and secondarily to 1972: https://psl.noaa.gov/data/correlation/qbo.data

The WCS 7/1/25 PDO was all the way down to -3.07, the most negative WCS PDO day of any during the couple of years I’ve been following the WCS. This barely beats the -3.04 of 5/31/24 and the ~-3.02 of 10/10/24: Barring anything unexpected, this will likely bounce upward from near this level based on prior WCS dips stopping just below -3.

I forgot to add 2023-4 MEI bimonthlies, which peaked at only +1.1 in ND: https://psl.noaa.gov/enso/mei/ @LibertyBell

-The 23-24 season ONI trimonthlies maxed at +1.95 in NDJ: https://www.cpc.ncep.noaa.gov/data/indices/oni.ascii.txt -The 23-24 season RONI trimonthlies maxed at +1.50 in OND: https://www.cpc.ncep.noaa.gov/data/indices/RONI.ascii.txt

Based on this graph, June WCS PDO calculates to be ~-1.8. That likely puts the June NOAA PDO, the one that the table refers to, way down in the -2.5 to -2.9 range, which is sharply down from the -1.71 of May. The current daily NOAA equivalent is likely down to the upper -3 range! The lowest daily WCS I’ve seen since starting to track this a couple of years ago is the -3.04 of 5/31/24. The 6/30/25 -3.00 is very close:

Please post your July 2025 observations as well as other current or recent conditions at any location.

Total June rainfall here was at a near normal 6.85”, with 6.8” of that falling June 1-18th. So, the last 12 days have been very dry. The first half of June had a wet 5.35”.

Per JB this morning for the N Hem this June: “In the Northern Hemisphere, we have had the average number of named storms. But now look at the ACE statistic. We are less than 1/3. Never have we had an average ACE of only 2/storm in June The average in June is 6.5. It's boggling what is going on in the WPAC, where we are at 10% of average with over 10% of their ace done.” —————- and for the Atlantic basin specifically, he said this: “The Atlantic naming were a complete joke. Isla Lobos where the so called center of Barry crossed had a half inch of rain and a gust to 22. Tampico had gusts to 31 and over 2 inches of rain and the center crossed close to them Andrea was a stratocu swirl But in a way I am glad they got named. the .6 between the 2 of them have established the all time record for weakest back to back storms at only .3 per storm”

Up to 0.64 ACE for season to date Storm Active Winds Pressure ACE Tropical Storm ANDREA 18z Jun 21 to 12z Jun 25 35kt 1014mb 0.24 Tropical Storm BARRY 00z Jun 27 to 00z Jun 30 40kt 1006mb 0.4 Season Total 18z Jun 21 to 00z Jun 30 40kt 1006mb 0.64

I guess 2025 may be the year of the ham sandwich! Technically though this may be more like a Rueben due to it being a threat to land. Regardless, congrats@BarryStantonGBP, for having a storm named after you!

@snowman19can’t stand cold/snowy weenie posts. He’s made it clear that that’s the main reason he posts like he does. What kind of winter he actually prefers may be irrelevant. I’m not a fan of weenie posts of ANY kind. Thus I try my best to avoid posting like that. It’s not easy though due to human nature.

Not a dream. It would likely put a relative lid on instability in MDR if it’s warmer to the N keeping it less active there than otherwise would be. We’ll see if temp pattern persists and how active MDR ends up.

https://s2s.worldclimateservice.com/climatepanel/ Click on 2nd thumbnail from top.

All across the MDR SSTs are ~1C cooler than to the N! This if it persists should keep a relative lid on TCs in the tropics themselves this year.

The PDO continues to plunge: The NOAA PDO is likely pushing -3.5!

A dry gust front (outflow boundary) that showed up well on radar moved SW into this area at midnight. Then at ~12:45AM, a small area of thunderstorms well to the E of the main area moved SW into this area producing only a few rumbles of thunder and light rain, which continues. Oddly enough, after blinking off and on ~20 times, my power finally went out ~1AM despite my not noticing a big gust of wind or any nearby CTG lightning. Edit: Power came back on just before 1:55AM.

It was Solar/NAO. What I found is that the only 6 sub -0.25 DJF NAOs since 1979-80 were all within ~two years of a cycle minimum and that every cycle minimum since the mid 1980s has had either 1 or 2 -NAO winters. 1984-5, 1986-7, 1995-6, 2009-10, 2010-1, 2020-1 Will we get two -NAO winters within the very late 2020s to early 2030s?

Upgraded back up to ham sandwich: Special Tropical Weather OutlookNWS National Hurricane Center Miami FL830 AM EDT Tue Jun 24 2025For the North Atlantic...Caribbean Sea and the Gulf of America:Special outlook issued to update AL90 formation chances1. Central Subtropical Atlantic (AL90):Satellite images indicate that shower and thunderstorm activity has become better organized in association with a small gale-force low-pressure system located about 900 miles east-northeast of Bermuda. This system will likely become a short-lived tropical storm later today before more hostile environmental conditions end its opportunity for development by this evening. The low is forecast to move northeastward at around 15 to 20 mph while remaining over the open central Atlantic. For additional information, including gale warnings, please see High Seas Forecasts issued by the National Weather Service.* Formation chance through 48 hours...high...70 percent.* Formation chance through 7 days...high...70 percent.

The BLT is still hanging in there in the new TWO with still a 40% chance thanks to new thunderstorms: Tropical Weather Outlook NWS National Hurricane Center Miami FL 200 AM EDT Tue Jun 24 2025 For the North Atlantic...Caribbean Sea and the Gulf of America: 1. Central Subtropical Atlantic (AL90): A small area of disorganized showers and thunderstorms have redeveloped on the north side of a gale-force low-pressure system located about 700 miles east-northeast of Bermuda. Environmental conditions are marginally favorable, and further resurgence of the thunderstorm activity could still result in the formation of a short-lived tropical depression or tropical storm. By later today, the low is expected to encounter more hostile environmental conditions, ending its opportunity for development. The system is forecast to move northeastward at around 15 to 20 mph while remaining over the open central Atlantic. For additional information, including gale warnings, please see High Seas Forecasts issued by the National Weather Service. * Formation chance through 48 hours...medium...40 percent. * Formation chance through 7 days...medium...40 percent. *Edit 8:10AM: chance raised back to 50% for a TD or TS at 8AM

Down to 40%. So, it has diminished from a ham sandwich to a BLT.

The ham sandwich still has a chance to become a TD through the day but I've got to tell you that it is a real ham: Tropical Weather Outlook NWS National Hurricane Center Miami FL 800 AM EDT Mon Jun 23 2025 For the North Atlantic...Caribbean Sea and the Gulf of America: 1. Central Subtropical Atlantic (AL90): Satellite images indicate that disorganized showers and thunderstorms are displaced to the east of an area of low pressure located about 600 miles east of Bermuda. Environmental conditions are still marginally favorable for further development, and an increase in thunderstorm activity could result in the formation of a short-lived tropical depression today. By Tuesday, this system is expected to encounter less favorable environmental conditions, ending its opportunity for development. The system is forecast to move northeastward around 10 mph, remaining over the open central Atlantic. * Formation chance through 48 hours...high...70 percent. * Formation chance through 7 days...high...70 percent. Forecaster Hagen —————- Though sheared, the LLC is pretty tight and may allow this to be upgraded to a TD or even TS Andrea later today.

The ham sandwich may get named: Tropical Weather Outlook NWS National Hurricane Center Miami FL 200 AM EDT Mon Jun 23 2025 For the North Atlantic...Caribbean Sea and the Gulf of America: 1. Central Subtropical Atlantic (AL90): Showers and thunderstorms continue to show signs of organization overnight with an area of the low pressure located about 500 miles east of Bermuda. Recent satellite-derived wind data also indicates the system has a well-defined surface circulation with maximum sustained winds of 30-35 mph. While environmental conditions are only marginally favorable, only a small increase in organization and persistence of the current shower and thunderstorm activity is likely to result in the formation of a short-lived tropical depression or storm, as soon as later today. By Tuesday, this system is expected to encounter less favorable environmental conditions, ending its opportunity for further development. Regardless of development, the system is forecast to move northeastward at 5 to 10 mph, remaining over the open central Atlantic. * Formation chance through 48 hours...high...70 percent. * Formation chance through 7 days...high...70 percent.