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759 FXUS61 KCTP 200838 AFDCTP Area Forecast Discussion National Weather Service State College PA 438 AM EDT Thu Aug 20 2026 .WHAT HAS CHANGED... -- Changed Discussion -- * SPC upgraded southeast PA to a Slight Risk, highlighting potential for damaging winds and a tornado or two. * Increased rainfall totals today, including potential for a swath of 1-2"+ and an associated risk for isolated flooding. -- End Changed Discussion -- Hazardous Weather Outlook National Weather Service State College PA 449 AM EDT Thu Aug 20 2026 PAZ010>012-017>019-024>028-033>036-041-042-045-046-049>053-056>059- 063-064-210900- Elk-Cameron-Northern Clinton-Clearfield-Northern Centre- Southern Centre-Cambria-Blair-Huntingdon-Mifflin-Juniata-Somerset- Bedford-Fulton-Franklin-Northern Lycoming-Sullivan-Southern Clinton- Southern Lycoming-Union-Snyder-Montour-Northumberland-Columbia-Perry- Dauphin-Schuylkill-Lebanon-Cumberland-Adams- 449 AM EDT Thu Aug 20 2026 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...Today and tonight. Multiple rounds of moderate to heavy rainfall may lead to isolated instances of areal flooding today. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. $$ Hazardous Weather Outlook National Weather Service State College PA 449 AM EDT Thu Aug 20 2026 PAZ065-066-210900- York-Lancaster- 449 AM EDT Thu Aug 20 2026 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...Today and tonight. Strong to severe thunderstorms this afternoon will be capable of producing very heavy rainfall, damaging winds, and a tornado or two. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. $$

0z EURO could have been interesting for the east coast.. EPS also but sooo far out..

Great... Flood watch extended

Is it a trend? Other models showing decent amount of rain, especially southern areas.

Yeah, this is a pretty solid setup: good dynamics, good deep layer shear, and moderate instability. CAMs suggest that most areas north of DC are close to a lock to get storms, while there is a bit more uncertainty for areas south of DC.

The first wave the OP GFS had been persistently developing the past few days was lost on the most recent 00z run. No surprise, around 100-120 hrs, it gets mauled by 30-50 kt westerlies. The 2nd wave mentioned in the previous post hits the same wall around 200 hrs out. Something probably will hit a favorable pocket eventually, and perhaps the deep mind is seeing that, but the upper levels will have to chill out. Not sure how the AI models are handling those same modeled westerlies simulated on the GFS and ECMWF operationals at advanced hours. That being said, recent EURO runs have been flirting with the build of dominant 500 MB heights over the ECONUS and WATL around Labor Day. We'll see if one of the later AEWs can find its way under that ridge and a more favorable ULAC pocket amidst the upper level chaos.

The latest few CFSv2 4 day means have reduced the Feb cold in the SE substantially: Compare that to how cold it was on the 4 day mean just 2.5 days prior:

Going to be very interesting to see if we get 'normal' El Nino conditions here. So far the Summer here has been about as hot as ever recorded, with near record low precipitation as well. 2023 was even drier in the Summer, but we're running hotter. Summer has been very close to 1953, 1958, 2023 as a blend, all the sort of drought plagued, -PDO, El Nino, very +AMO shit years locally. It's actually been very interesting - for the past month little batches of rain showers have formed late evening almost every night. But they are widely scattered and have only brought drizzle to the city most nights. A lot of the terrible monsoon years don't even have the showers form. But they typically perform best for rainfall late afternoon to about 8 pm. We've seen showers develop in the 8 pm to 2 am time frame and then sizzle out, which is unusual here for formation time. The Atlantic has really warmed up quite a bit relative to averages over the past 2-3 weeks. I think we will actually see a brief period of decent hurricane season activity in September. My hottest average temperature El Nino Summers are these winters: 1994, 2023, (2003 borderline El Nino), 1958, 2018, 1953, 2002. We tend to get fluky out-of-season heavy snow events following very hot and very dry Summers here. 1994-95 snowed a lot in April, 1953-54 in November, 2002-03 in March, 1958-59 in March, 2023-24 in November. Several of these also see good snow in the main winter too. My guess is the MJO will set up to favor bigger storms nationally in something like an Oct 15-->Nov 30-->Jan 15-->Mar 1-->Apr 15 fashion for major events given the local Summer data supports unusual concentration of heavy snow events in Nov/Mar/Apr so far, more than the winter.

Everyone is saying shutout or HECS. I don't think the Winter will be like that. I can say pretty confidently that we will have snow periods, but maybe 3-12" type events. I don't see us blowing up a GOA low and -NAO, which are hecs patterns. We'll see.

Look at this: NWS in my neck of the woods mentions Nino - BUT I am not getting my hopes up. I am an excitable guy by nature, but I am also a realist. This is a record Nino that is extremely east-based. This means we will not get much rain in Austin from this Nino thru later 2027. But watch out Southeastern US and Mid Atlantic. This record Nino has got your name on it and it's got one hell of a roided up STJ. This Nino means bisnass. Get your arks ready in the DMV and the Southeast and Mid South. or move RIGHT NOW to the Mountains. This STJ means serious serious business and it will not spare and it will show no mercy and pull no punches. Some communities will get drowned by catastrophic flooding and it will last for a long time. Some neighborhoods in the Mid South, Southeast and Mid Atlantic will receive so many rounds of rain, that they WILL BE WRITTEN OFF. It's really too damned Bad I live too damn far west for this. I wanted to walk around and admire rising water levels while blasting Gen Z tracks, especially Playboi Carti, Kodak Black and Ken Carson. These songs and raps remind me of disasters in the 2020s. .LONG TERM... (Friday through next Wednesday) Issued at 123 PM CDT Wed Aug 19 2026 The 500mb ridge steadily migrates eastward and by Friday/Saturday, it will be centered over the Texas Panhandle. At the 700mb level, the thermal ridge will be centered directly over Texas, so strong subsidence and sunny skies should be the normal through the weekend. Heat advisories will continue this weekend and actual air temperatures may approach warning levels (105+) for the Austin metro this weekend. Trends will be monitored for a possible upgrade to Extreme Heat Warning, but for now, expect highs in the 99-104 range for most locations through Sunday. Unfortunately, despite a brief lull and advisory level temperatures Monday-Tuesday, ridging will be in even greater control by mid to late next week, and highs in the 100-106 range look like a good bet. At this distance, little relief is in sight through the end of August, but a pattern change may be in the works as El Nino continues to strengthen over the Equatorial Pacific, which may result in increased rain chances in early to mid- September.

Yeah I've been watching the radar all evening and it's just crazy. I can't recall a time where a specific area had so much rain in such a short amount of time. It looks like there's a break soon but yet another wave back by ILX.

Nice composite

Yeah even today had more clouds than I thought it would. Just been a meh weather month, and this weekend doesn't look to change that. Our area is fine with rain and the reservoirs are good. Abnormally dry doesn't mean a drought.

I read somewhere that a high amount of Saharan sand can knock down the threat and there was a large amount being transported this year. Does this have any basis in fact?

This is exactly why I stated we are approaching entropy. In that sense ACC is entirely normal because the entire universe is headed towards entropy. Also see my post in the El Nino thread about there being no ice on this planet for 85 percent of its history.

What a cave by rufus

It's been raining for 6 hours straight again. This is getting stupid.