GaWx

Compared to the terrible 2023 near the FL Keys (red line), when there was a terrible record breaking longlasting (mid June to early Sept) coral bleaching, 2025 (black line) has been much tamer with barely any bleaching hours so far. It’s also been a good bit cooler than 2024. The reason 2023 SSTs were so hot there was a drought along with wall to wall sunshine to add to the background warming from GW:

The OHC steep cooling over the last couple of weeks continues:

Absolute brutality will be coming early next week from Mother Nature if this forecast for my area verifies well:SUNDAY SUNNY, HOT WITH HIGHS AROUND 100. HEAT INDEX VALUES UP TO 110. SUNDAY NIGHT MOSTLY CLEAR. LOWS AROUND 80. HEAT INDEX VALUES UP TO 110 EARLY IN THE EVENING. MONDAY SUNNY WITH A CHANCE OF SHOWERS AND THUNDERSTORMS. HOT WITH HIGHS AROUND 100. CHANCE OF RAIN 30 PERCENT. HEAT INDEX VALUES UP TO 115. MONDAY NIGHT PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 70S. CHANCE OF RAIN 20 PERCENT. HEAT INDEX VALUES UP TO 110 EARLY IN THE EVENING. TUESDAY SUNNY WITH A CHANCE OF SHOWERS AND THUNDERSTORMS. HIGHS IN THE UPPER 90S. CHANCE OF RAIN 40 PERCENT. HEAT INDEX VALUES UP TO 115.

From JB today fwiw: he likes to look at Euro AI ensemble members (ever since that product became available earlier this summer) vs EPS/GEFS and he’s also considering EPS’ MJO forecast: this period is before the increasingly active week that yesterday’s Euro Weeklies showed Day 15 06 z AI ends like this with a trough in the Tennessee Valley. and a spray of cyclones suggesting an east coast impact threat AI VV patterns in the 10-15 are bullish for the tropics which would mean a stronger rotation into phases 8,1,2,3 more so than the euro ensemble

Today’s Euro Weeklies had a large increase vs yesterday for the week covering 8/18-24. Yesterday’s run for 8/18-24: Today’s run:

Just some light rain, mainly this morning, so far today. Only about 1/10” today so far. Showers were moving in a somewhat unusual WSW direction from offshore.

I don’t think it’s accurate to say there’s no climate crisis from GW. The combo of the melting of land based ice flowing into the oceans as well as expansion of ocean water has been causing an accelerating rise of sea level. Also, higher dewpoint air being able to hold more moisture as well as a slight reduction of avg steering flow due to a reduced temp. contrast between the rapidly warming Arctic and the significantly slower warming of the tropics have combined to cause a notable increase in flooding rainfall events. That being said, not everything about GW has been bad. One great thing is that global food supply has increased markedly due to larger crops. This is due to longer growing seasons (longer period between freezes) accompanied by increased moisture and the ability to grow crops further north. In addition, plants have more CO2 to take in for photosynthesis. I’ll reiterate that had we instead of GW had the same amount of cooling, global food supply would be much, much smaller thus likely leading to starvation of at least hundreds of millions. Another mini-ice age would have been terrible.

It wasn’t Irene because that one didn’t occur til mid Oct. Sept. 27-30 definitely wasn’t from a TC per the NHC archives for 1999. There also was no TD then. However, with heavy rainfall like that, there likely was ample tropical moisture in the mix.

Hey John, Though this is very sad to hear, we thank you for taking the time to let us know. May your father rest in peace. Hopefully he’s now in a better place and that that hope gives you comfort during this difficult time. He was an extremely proud father for what you stood for as a NC Rep. His mainly clean, witty jokes made many of us laugh. He’ll be long remembered by many here for those and his love of following the weather among other things. He was til only very recently still moderating, a position he took seriously til the very end. For example, we could always depend on him as needed to pin a new thread and unpin an old one in a timely fashion. Sadly, he’s not here to pin this thread. @buckeyefan1 @stormtracker @Mr Bob @ORH_wxman @Wow

I had no rain during the daytime, but I’ve had light rain falling the last couple of hours along with some mainly CTC lightning/rumbling thunder. Total rainfall for today has been only ~0.05”.

This is referring to some of the remnants of Invest 93L coming over the Gulf again: Tropical Weather Outlook NWS National Hurricane Center Miami FL 800 PM EDT Tue Jul 22 2025 For the North Atlantic...Caribbean Sea and the Gulf of America: North-Central Gulf: A trough of low pressure on the southern end of a frontal boundary is currently located just offshore of the Southeastern U.S. coast. Over the next few days, this system is forecast to move west-southwestward into the north-central portion of the Gulf, where environmental conditions could allow for some slow development if the system remains far enough offshore. By this weekend, the system is likely to move inland, ending its chances for development. Regardless of formation, heavy rainfall could be possible for portions of the northern Gulf coast through this weekend. * Formation chance through 48 hours...low...10 percent. * Formation chance through 7 days...low...10 percent. $$ Forecaster Papin

Nino OHC plunging in mid July!

yes

I voted cooling. To this point extreme cold has killed more than extreme heat though heat related deaths are increasing. -4C cooling would be devastating to food supply, among other things, which could easily kill hundreds of millions. GW has lead to increased crop sizes to this point.

Hey Liberty, If the average relative humidity were to have risen, then I’d agree. Whereas the avg dewpoint has risen (reflecting increased moisture content), there’s no indication the RH has also risen as the temps have risen along with the dewpoints.

I compared the 0Z 7/22 GFS and Euro progged highs for ATL. Now I’ll do it for NC: 0Z 7/22 hottest highs for RDU/GSO/FAY: 0Z 7/22 GFS: RDU 102 (7/29), GSO 101 (7/29), FAY 104 (7/28) 0Z 7/22 Euro: RDU 98 (7/27); GSO 98 (7/27, 7/30, 7/31); FAY 100 (7/27) So, the 0Z 7/22 GFS’ hottest is hotter than that for the Euro by 3-4 F. That sounds quite familiar. Who do you favor? Based on many significantly too hot GFS runs and much closer Euro runs for the late June heatwave, I’m easily favoring the Euro for GSO/FAY. RDU is tricky though because of its often too hot sensor. So, I’ll go halfway between for RDU (what verified there in late June). So, I’m going 100 for RDU, 98 for GSO, and 100 for FAY as of now for a wild guess of the hottest of 7/27-31.

Based on the quotes I copied below from June showing the GFS as having verified as being much too hot for highs, the 0Z 7/22 GFS will almost certainly verify as too hot and likely much too hot for highs as the hottest at ATL was 95 on 6/24 and 96 on 6/25. First, here’s the laughable 0Z 7/22 GFS for KPDK (NE ATL/Chamblee) (0Z Euro is much cooler there with hottest highs of “only” 101 on 7/30 and 103 on 7/31 and will likely come much closer): highs of 100 today vs FFC’s forecast of 96, 103 on 7/28, 104 on 7/29, 108 on 7/30, and 107 on 7/31 (Keeping in mind that FFC was almost spot on for the late June heat by being much cooler than the GFS, FFC’s forecast hottest through 7/29 is only mid 90s): Second, here are quotes of two posts I made elsewhere in late June showing the way too hot GFS progs for late June highs: “KATL is also looking brutal on the 6Zs this week with these highs: (GFS/Euro) 6/22: 96/91 6/23: 99/95 6/24: 103/102 6/25: 101/104 6/26: 94/96 6/27: 96/87 Currently FFC has ATL’s hottest on 6/25 with upper 90s, but they’re watching closely.” and ”Which did better today for highs, GFS or Euro? 6Z GFS/Euro highs today for: RDU: 103/99 vs actual of 100; Euro wins GSO: 101/100 vs actual of 95; both were terrible though Euro less terrible FAY: 99/99 vs actual of 98; both did well ATL: 102/98 vs actual of 95; Euro did better than the awful GFS but still was 3 too hot Euro also did better yesterday at GSO and FAY So for these 2 days overall, Euro did significantly better than GFS, which tended to be at least several degrees too hot.”

Actually, Graham had heavy rains from not one but two TCs in Sept of 1999: -6.36” Sept 5-7 from Dennis -4.30” Sept 15-17 from Floyd In addition, they had 5.12” Sept 27-30 from I don’t know what (no named storm then). https://www.weather.gov/wrh/Climate?wfo=rah

Invest 94L is no more. The following isn’t out of the norm for a late July TWO: Tropical Weather Outlook NWS National Hurricane Center Miami FL 800 AM EDT Tue Jul 22 2025 For the North Atlantic...Caribbean Sea and the Gulf of America: Tropical cyclone formation is not expected during the next 7 days. $$ Forecaster Pasch

An outflow boundary just came through here. No rain here yet. Hearing thunder. Very dark skies just to the south. Edit 7:45PM: Here there was a collision of that aforementioned outflow boundary, which actually appeared to be a seabreeze on closer examination, and one moving in nearly the opposite direction (from inland) that was true outflow from a well inland thunderstorm complex. That collision lead to an area of thunderstorms near the coast and which soon after made it here. There had just been a short period of heavy rain (first since July 13th) though it has for now lightened up. Looking at radar, the thunderstorm area may hang around for awhile. Crossing my fingers this doesn’t turn into a heavy rainfall event. Now moderately heavy rain. There’s been some rather hefty gusts with this, too. High these last two days has been a very uncomfortable 97, hottest so far this year. Edit: Yesterday’s (7/21) rainfall was ~0.7”.

Good find. I see what you’re saying about the two of them mentioning Humberto by far the most frequently since last year. Though not absolute proof, it admittedly at least looks quite suspicious. Also, Barry vs Barrett fwiw. As you can see both accounts still show up with profiles. So, I assume that means different IP addresses. Probably not but does that tell you anything?

Thanks, Yoda. So, this Andy Hazelton tweet is sort of agreeing with what Eric Webb just had said about an expected quiet August into early Sept. Note, however, that Andy said “I’m kinda of the same opinion that August may be quiet in the Atlantic”, which isn’t a forecast since August “may be quiet” in any year. A forecast would say something much more explicit like “August will be quiet”, “I expect August to be quiet”, or “August will likely be quiet”.

A nice dry outflow boundary ahead of a small area of convection has just come ESE through here with winds picking up. We’ll see if I get much rain. Edit: There was no rain here as it slid by just to my south.

The main diff, especially in the SE US, was that Feb of 2011 had a strongly +AO/NAO. Of DJF, F is often the warmest in La Nina. Edit: Also, in New England and NYC at least, DJF 2010-1 was actually colder than DJF 2009-10.

For those who may not realize this: The # of FFWs going up by a factor of ~5 over the last 40 years isn’t by any means just due to CC: Here’s why record-high flash flood warnings were issued in U.S. this year Rachel Dobkin Thu, July 17, 2025 There has been a record-high number of flash flood warnings issued in the U.S. this year, which can be linked to climate change and improved weather systems. Climate change can make river floods larger or more frequent in some places, according to the Environmental Protection Agency. But one expert explained another reason why there are more flash flood alerts than ever before. Amir AghaKouchak, director of the Center for Hydrometeorology and Remote Sensing at the University of California, Irvine, told NBC News radar systems and weather models have significantly improved over the last 40 years. “The system that was implemented back in the ‘80s is not the same as the system that we have now,” he said. “We have many, many more radars, and we have many different sources of data.” “So naturally you expect more warnings just because our systems are getting better and better,” the expert added. https://www.yahoo.com/news/why-record-high-flash-flood-000109408.html