GaWx

A shower coming moving SW from offshore started here ~5 minutes ago. It likely won’t amount to too much due to it likely being brief due to rapid movement and it not being large.

Thanks for posting that. Regarding the PNA based on analyses I’ve done on snowfall for SE cities like RDU and ATL, a +PNA is the #1 most correlated index to snow in the SE. Since El Niño and +PNA are well correlated, having El Niño on average tends to be good relative to other ENSO for SE snow chances in general.

For anyone who happens to care, this is what I just posted elsewhere about my up to date general feelings about AGW/CC: 1) Anthropogenic Global Warming (human-caused CC) is real, has caused mean global temperature to warm ~2-3F, and is causing it to warm further. 2) Regarding CC reducing snowfall, that’s been true overall, which is intuitive. But for a specific location, the relationship between CC and change in avg snowfall is complex as it can actually cause heavier snowstorms in some cases since warmer air holds more moisture. This is especially the case where normals are well below 32F. 3) What’s debatable are four main things as I see it: a) Projections of rate of future warming because of realistic possibility of negative feedback loops, on which climate models likely don’t have a good handle. One example is “CO2 Fertilization Effect”: ^CO2 leads to ^photosynthesis, which leads to greener planet. Also, warmer planet means longer growing seasons and growing in higher latitudes than before. Greener means ^CO2 absorption for globe. So, at some point increase in CO2 would likely decelerate and perhaps later completely stop. b) I’m not at all saying AGW/CC’s good. The main concern I have is rising sea level caused by combo of melting land based ice and expansion of oceans due to warming waters. Also, it likely leads to increased flooding events since warmer air holds more H2O. That includes wetter TCs. But CC isn’t all bad. Why? - It’s likely leading to larger crops overall due to a combo of CO2 Fert. Effect, longer growing seasons due to warming, and ability to grow crops at higher latitudes due to warming. That means larger food supply and at least in theory less hunger. -Cold in the past has killed many more than heat globally. Thus so far, CC has actually lead to reduced deaths from extreme temps. But admittedly assuming globe continues to warm, increased heat related deaths will likely overtake reduced cold related deaths. c) Storminess: CC may actually be reducing the avg storm strength. Why? It has caused much more rapid warming in Arctic than in tropics. That means reduced temp. difference from poles to tropics, which means slower jet stream, which means less energy available for storms to strengthen. Possibly related to this: typhoon activity has come down in recent decades. d) There’s a lot of controversy concerning the connection of CC to individual extreme events aka “CC attribution”. I feel it’s overdone at times or at least there’s often a rush to attribute extreme events to CC without enough time or evidence to soundly prove it. I’m not saying no extreme events have been made worse by it. Almost certainly extreme heatwaves have been made worse by it than would otherwise have been the case. Example: the March SW US heatwave. But here are some examples of a rush to judgement about the CC connection that needs much more time to study it: -Nepal disaster. Whereas CC probably was at least a minor cause since it has been leading to melting glaciers overall, was it actually a major cause as some have already claimed? If bedrock failure was indeed the major cause, was that in itself due to GW? This needs much more time to study as it is very complex. -Wildfire disasters: Whereas a warmer globe has likely helped lead to increased fires in some cases, that likely hasn’t been the case for many fires. Also note that global burnt acreage year to date has actually been during the last 2 years the lowest it has been as of this date since 2012! ———————— Edit: I forgot to mention that the UHI effect needs to be taken into account when comparing temperatures in past decades to today. This is especially the case for comparing temps for large cities/metro pop. that had much smaller pop. in those past decades.

Per my post from two days ago ITT that analyzed El Niño seasons with <4.3 ACE as of then, I’d be wary that despite the very slow start there likely will be some dangerous activity in some areas late Sept to mid Oct especially if I were a (near) coastal resident.

The warming related to AGW is itself a factor helping to cause 2026-7 to be so much warmer than these prior Ninos since the globe continues to warm. Without that, although 2026-7 would possibly still be the warmest, it at a minimum wouldn’t be as far above these others. In other words, this graph isn’t a fair way to determine the strength of each of these El Niños, themselves, since AGW gives an advantage to later ones.

The Nino is likely going to greatly help some ski resorts this winter.

Not Atlantic basin per se but this is interesting: The UKMET has for the 2nd run in a row a TC in the Mediterranean Sea: 12Z UKMET: NEW TROPICAL CYCLONE FORECAST TO DEVELOP AFTER 132 HOURS FORECAST POSITION AT T+132 : 35.8N 21.0E LEAD CENTRAL MAXIMUM WIND VERIFYING TIME TIME POSITION PRESSURE (MB) SPEED (KNOTS) -------------- ---- -------- ------------- ------------- 0000UTC 14.09.2026 132 35.8N 21.0E 1008 31 1200UTC 14.09.2026 144 38.7N 24.0E 1007 27 0000UTC 15.09.2026 156 40.5N 24.6E 1007 27 1200UTC 15.09.2026 168 39.6N 22.6E 1008 25

For the first run I’ve ever seen, the CFSv2 ensemble AAM forecast has its key at the bottom of the graph because there’s no room on top on either side! It is approaching 3. Three of the four members of the 9/7/26 12Z run have it exceed 4 on Sept 15th (day 9). I’ve still never seen the AAM get to 4 by the way. Will it finally do so this time?

More decent rain falling here last few minutes (since 3:45), to add to my 0.35”, but radar shows and skies suggest it won’t last more than a few more minutes most likely. Edit: 3rd rain from a shower fell just after 5PM. Looks like another quick one. Edit: updated total for Sept 7th here: ~0.4”

Despite the high level of activity in the EPAC, they’ve almost entirely avoided getting close to MX. Only the two TS Boris and Cristina were right next to MX or C America and those were in early June, well before the Aug 14-Sep 4th period you showed the 250mb wind component anomalies for. The only 4 during Aug 14th-Sep 4th that even show MX on the map were the four I’m noting below and one can see that MX isn’t even that close. All of these mainly avoided the areas with average 250 mb wind anomalies of +6+ on your map as their tracks were mainly within the +2 to +6 anomalies (yes still + but not large + anomalies and they may have formed when actual anomalies were lower since your map is just the avg for a 3 week period): -TS Iselle: TS Julio: H Karina: H Maria: closest to MX of these 4 but still 375 miles away from Cabo Here’s ‘26 season to date: Compare the above ‘26 season to date map with the 2015 full season below. Note that in 2015 by today’s date, the following had already occurred that were either right at or nearer MX than the ‘26 tracks excluding Boris: -Blanca (cat 4 H) -Carlos (cat 1 H) -Dolores (cat 4 H) -Kevin (60 mph TS) not too far from Cabo -Linda (cat 3H) not too far from Baja

A batch of showers formed along the cosst in SC 2 hours ago and has just moved SW into my area with heavy rains and initial gusty winds starting ~2PM. This is adding up nicely and is this my first significant rain of the month. Edit: It rained for only ~20 minutes and this didn’t add up to as much as I had hoped for. But I still got a not too shabby ~0.35”, the most by far this month to date.

After being pretty flat in August/first few days of Sept, the relative 3.4 OISST anomaly has risen sharply the last two days: Sept 4th relative 3.4: +2.254 Sept 6th relative 3.4 anomaly: +2.429, a rise of 0.175 in just two days…that’s the most rapid two day rise on this entire chart as it is the most rapid two day rise since June 3rd-5th, which is not on this chart:

The daily WCS PDO has risen back substantially the last 7 days ending yesterday with it up to -0.9, the highest since way back on July 2nd, vs ~-1.65 one week earlier:

Here’s the version of CRW anomalies for Nino 3.4 that best takes into account GW in determining anomalies: it’s +2.5C and rising:

CANSIPS appears to have a significant Modoki bias based on several years of data. I thought it had this bias even before this year.

The latest relative weekly for Nino 1+2 comes in about where I expected, +3.9. This for the 2nd week in a row is at a record high (back to 1981) for the week, warmer than 1997’s +3.6 and 0.4 warmer than the previous week’s +3.5. The highest relative 1+2 on record for any week is +4.6 (1983) and the highest relative in 1997 for any week was +4.1, which was set twice. Regarding the relative for other regions, Nino 3 warmed barely while 3.4 and 4 stayed the same. The changes overall mean an even more E based Nino than the prior week showed: 9AUG2026 3.2 2.5 1.8 0.0 26AUG2026 3.5 2.6 1.8 0.1 02SEP2026 3.9 2.7 1.8 0.1 For comparison: 03SEP1997 3.6 2.8 2.0 0.4 So, early Sept. ‘26 is slightly more E based than the previous most E based early Sept. (back to 1981) of 1997. https://www.cpc.ncep.noaa.gov/data/indices/rel_wksst9120.txt

I assume you know that the warmest month of the winter of 1982-3 in the E US, including SE, was Dec by a wide margin. It was a bonafide torch, the only month like that in the SE to NE. The remainder in the SE was pretty close to normal to slightly BN in some areas.

As a near coastal resident who was directly affected heavily by FIVE H/TS 2016-24, I’m very much enjoying the break from the stress of threats! However, looking back at the 6 other El Niño seasons with <4.4 ACE through Sep 6th tells me to still be cautious for the rest of the season, especially late Sept through mid-Oct: 1) 1941: -TS TX/LA border mid Sep -H TX late Sep -TS Windwards/MH Honduras/Nicaragua/H Belize late Sep -H NW Bahamas/MH S FL/H FL Pan early Oct -TS SE Bahamas/FL Big Bend mid Oct 2) 1929: -MH NW Bahamas and S FL tip/H FL Pan late Sep 3) 1914: -TS FL/GA border mid Sep 4) 1905: -TS Belize/LA late Sep -TS W Haiti early Oct -TS LA early Oct 5) 1904: -H upper SC mid Sep -TS Belize early Oct -H C Cuba/S FL mid Oct -TS FL Pan early Nov 6) 1876: -H/Leewards/MH VI and PR/H Hisp/E Cuba/NC mid Sep -TS Windwards late Sep/H Nicaragua early Oct -H Caymans/MH W Cuba/H Keys and SW FL/TS Bermuda mid Oct These six very quiet first half of season El Niño analogs are suggesting an avg of 3 TCs (range 1-5), including 1.5 H (range 0-3) and 0.8 MH (range 0-2) yet to come that would have significant to major land impacts. Hopefully though it will be most like 1914 or otherwise 1905 at the worst! https://www.nhc.noaa.gov/data/

1. This very strong El Niño has a good chance to start helping out you and other SE dry areas by Nov and hopefully would then continue on/off through March as climo suggests. 2. I ended up getting very little from the late afternoon thunderstorms. It was only ~0.04”.

I’ve been getting light rain from thunderstorms during the last ~1/2 hour as it started ~4PM. I just heard pretty loud thunder from one fairly close CTG lightning strike.

I’m not disagreeing with you because I’m, myself, quite suspicious about the 1/15/22 Hunga-Tonga causing that delayed temp spike earlier in ‘23 than what the ‘23 El Niño should have caused. But if you were to post that in the CC forum, you’d get a lot of opposition or at least doubt based on past Hunga-Tonga discussions in there. Several folks there have downplayed it because they think the warming effect was minimal/far lower than that early ‘23 temp spike and they backed it up with at least one source fwiw.

Thanks. But this graph has avg for entire summer well over 0C? This is far warmer than what Chris Martz was suggesting about the site of the collapse (i.e., only occasionally reaching to barely above freezing), isn’t it?

Thanks, Don. Does that big a difference in temps for just 160 km away and 164 meters/538 feet elevation jibe with what you’d expect? Dry adiabatic rate is 3C/5.4F per 1000 feet, correct? So, on 2nd thought, maybe?

Although this 12Z 9/5/26 CFSv2 ens. AAM fcast is THE highest I’ve seen for the entire 35 day period, I realize that it has a + bias, especially the further out in the forecast period. I still haven’t seen anything forecasted at 4+ to verify even closely and even many of the 3+ forecast days have been overdone. This has 4+ for all 4 members by day 11 (Sept 15th), which along with the 0Z 9/5/26 forecast is at the earliest I’ve ever seen that high. It has 3+ starting on Sep. 8th. But as I alluded to, many runs had 3+ for all of mid to late Aug and all of Sept and few, if any, days actually hit 3+ since mid Aug. It even dipped briefly to just below +2 in late Aug! In this case, I expect it will reach 3+ within a few days based on how steep it has it rising now. But regarding it hitting 4+ Sep. 15th or even after, I’ll believe it when I see it!

I’m admittedly confused. Are we looking at the temp. data for the same place? Per my post from 3 days ago: “Highest and lowest recorded temperatures at Everest Base Camp (EBC) depend on which camp and which dataset, but reliable observations come from automatic weather stations (AWS) installed at the South Base Camp (Nepal side, ~5,364 m) and other nearby high-altitude stations. Summary of best-available values (observations and published AWS records, through May 2024): Highest recorded air temperature South (Nepal) Base Camp AWS: about −1.0 °C to +1.0 °C on the warmest days in late spring/early summer (typically May). Many published station summaries and expedition logs report peak values near 0 °C; a commonly cited peak is ~+0.5 °C. Slightly warmer spot measurements in sunlight or lower-elevation tent sites can exceed +1 °C briefly, but sustained, instrumented air-temperature peaks at the official South Base Camp are around 0 °C to +1 °C. @donsutherland1@Typhoon Tip