GaWx

Are we headed for another 2023-4 where SSTs are warm around Australia? Per JB, the models that showed for winter 2023-4 at H5 the mean E US trough/Aleutian low (most of them) didn’t have it that warm there and thus he blamed the unforecasted warmth around Australia.

After a very strong warming the prior 5 days averaging a very impressive 0.1C/day, the latest OISST 3.4 finally slowed its warming although it still warmed slightly (.014). Now that the full week’s data is in, I’m guessing 3.4 will be warmed by 0.3C to +0.8C in tomorrow’s release:

The MJO ended up going strongly into phase 8 (see image below) after all despite models a couple of weeks ago going only modestly into it and extended ensembles a month ago turning left in 7 toward the circle/missing 8. Bastardi back in April predicted W Car/Gulf TCG in June based on his expectation the MJO would go into 8 despite the extended ensembles not showing that. He more often than not predicts early activity. So, that’s not unusual. But he was right about the MJO. Will he be right about the Atlantic basin June TCG? Models/ensembles are hinting at the chance for this late this week:

Thanks, snowman. A key will be to see whether or not 3.4/4 fall severely behind regions 3/1+2 to determine whether or not this will be a very strong form of E based. For those who prefer it be/not be overly E based like ‘97, you’ll want 3.4 to not warm too steadily/keep warming steadily through the summer/early fall overall.

The Memorial PGA event, hosted by Jack Nicklaus, in Dublin, OH, has a Hickory, NC native, JT Poston, with a big 4 shot lead over Raleigh, NC native Ryan Gerard headed into rd 4. The Memorial is easily considered a top 3 event in terms of field, prestige, and difficulty of course after the Majors/TPC. Yesterday it not only had 2 rain delays, it had from a supercell penny sized hail falling live on TV! That’s a first for me to see at any golf tourney. One thing that contributes to my enjoyment of watching golf is the strong wx influence.

Thanks. The 0Z EPS cut back significantly on the % of members with Gulf TCG vs yesterday’s 12Z run. It will be interesting to see how future runs compare. The 6Z GEFS has significantly increased activity vs earlier runs. Edit: The 12Z GEFS is significantly quieter than that more active 6Z GEFS.

Yesterday’s 12Z EPS had nearly 50% of its members with a TCG in S Gulf/NW Car late next week with most of those then heading to the U.S. Gulf coast the following week. However, the 0Z EPS cut back significantly on the % of members with Gulf TCG vs yesterday’s 12Z run. It will be interesting to see how future runs compare. The 6Z GEFS has significantly increased activity vs earlier runs.

It sometimes updates later but, yes, it often does update in the middle of the night our time. The 24 hour period that each daily is based on evidently ends at about the average middays of Darwin and Tahiti.

It turns out that the models were right on as today’s Darwin SLP is 1017.70, the earliest that high so early in the season and the 8th highest on record: 7 Jun 2026 1014.05 1017.70 -34.73 Darwin will be lower tomorrow. Based on history, that 1017.7 could easily end up the highest daily Darwin SLP of 2026. But there’s no telling for sure as an SLP that high remains possible through September (end of their winter).

Thanks. If a Gulf TC were to materialize in mid June, then JB will get a big win on a call he made way back in late April as I recall based on projecting MJO phase 8 in early or mid June though he had been leaning more toward a week earlier as he even admitted.

Thanks, Chuck. Consistent with that, 2025 has by a large margin the strongest +AO for the period I was analyzing, May 23rd-June 4th from 1958 through 2026. That period in 2025 was chilly (~1.5C BN) though not nearly as cold as the ~-3.5C of 2026. By the way, 2026 had the 4th strongest +AO of this period back to 1958 thus intuitively helping it be one of the coldest. 2023 had the 10th strongest +AO and was ~1C BN. 1994 had the 2nd strongest +AO but it was only ~0.5C BN. 1996 had the 3rd strongest +AO, but it was NN rather than cold. So, the correlation of +AO to cold N of 80B is far from perfect due to other factors coming into play as you very likely realize even though there’s still a decent partial correlation.

A freaky record breaking cold period for N of 80N just occurred May 23rd-June 4th per the image below (records back to 1958). I saw it mentioned by Bastardi but wanted to confirm it, myself. So, I went through the graphs for every year to confirm this and it turns out he’s right with that period averaging ~-6C, which is ~3.5C BN:

Tropical ATL predictions so far ITT: ineedsnow 11/4/2 me 8/4/1 ACE 52 LongBeachSurfFreak 12/5/2 Jconsor 13/6/2 ACE 90 Silver Meteor: 10/5/2 ACE 82 WxWatcher007 9/4/2 LakeNormanStormin 10/4/2 Any others? —————— Also, the 12Z EPS has nearly 50% of its members with a TCG in S Gulf/NW Car late next week with most of those then heading to the U.S. Gulf coast.

The strong 3.4 OISST warming hasn’t stopped as it warmed 0.12 on 6/5, which means a whopping 0.5C warming 5/31-6/5! Mon’s weekly should be ~0.3 warmer (~0.8). 6/5 RONI equivalent is ~+1.0:

More on 97. Here were the monthlies: 1+2 3 4 3.4 1997 6 26.12 3.00 28.13 1.51 29.23 0.26 28.82 1.09 1997 7 25.59 3.63 27.90 2.09 29.37 0.47 28.86 1.56 1997 8 24.96 3.96 27.71 2.59 29.29 0.50 28.75 1.89 1997 9 24.69 3.96 27.74 2.84 29.44 0.68 28.85 2.13 1997 10 24.69 3.67 28.06 3.08 29.34 0.58 29.08 2.36 1997 11 26.12 4.47 28.37 3.27 29.39 0.69 29.12 2.41 1997 12 27.06 4.25 28.53 3.30 29.11 0.57 28.89 2.29 1998 1 28.12 3.55 28.74 3.08 28.95 0.64 28.93 2.38 1998 2 28.74 2.64 28.90 2.49 28.79 0.59 28.78 2.03 1+2 (peak 4.47) and 3 (peak 3.3) were way, way stronger than 4, which remained just wk (peak 0.69) and even way stronger than 3.4 (peak 2.41)! The forecast for ‘26 is much stronger in 3.4/4 and stronger in 3, but not as strong in 1+2: Per latest Euro, here are peak non-rel. monthlies: 1+2: 3.9 3: 3.9 3.4: 3.7 4: 2.4 That’s only a contrast of 1.5 from E to W compared to 3.8 in ‘97! And contrast from 1+2 to 3.4 is a mere 0.2 vs 2.1 in ‘97!! So, the prog is for ‘26 to be E based but way more balanced and thus not nearly as E based as the extremely E based ‘97.