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Tomorrow will be variably cloudy with perhaps some morning showers or even a thundershower as a strong cold front crosses the region. Following the frontal passage, the region will see its coolest air so far this season. New York City could see its first temperature below 50° since May 13th after midweek.

During the middle of the week, Hurricane Milton will make landfall on Florida's west coast. The storm will likely make landfall as a Category 3 and perhaps Category 4 hurricane. It will bring a devastating storm surge inland. There remains a risk that Tampa could face some of the hurricane's worst impacts even as the guidance has shifted somewhat southward. The later guidance will lead to a more precise picture.

In the Southwest and parts of California, near record and record heat continued. Phoenix reached 113°, which smashed the daily record by 8° and tied the monthly record set on October 1st. Since September 25th, Phoenix has had 6 days with highs of 113° or above. In its full-year climate record that goes back to 1896, 98 years (76% of the record) had fewer than 6 such days. The most recent such year was 2014 (3 days). The region has never seen a late-season heatwave like the current one. The extreme heat will fade toward midweek.

The NAO fell to a preliminary -2.751 on September 24th (all-time September record: -2.371, September 12, 1971). That was the 9th lowest value on record. La Niña winters following September cases where the NAO fell to -1.900 or below featured a predominantly positive NAO. The most recent such winters were 2016-2017 and 2022-2023. The mean temperatures for those winters in New York City were 39.3° and 41.0° respectively. The 1991-2020 normal value is 36.2°. A warmer outcome is favored by the September run of the C3S multi-model forecast for Winter 2024-2025.

The ENSO Region 1+2 anomaly was +0.2°C and the Region 3.4 anomaly was -0.5°C for the week centered around September 18. For the past six weeks, the ENSO Region 1+2 anomaly has averaged -0.20°C and the ENSO Region 3.4 anomaly has averaged -0.18°C. Neutral ENSO conditions will likely evolve into a La Niña event during the fall.

The SOI was +10.31 today.

The preliminary Arctic Oscillation (AO) was -1.970 today.

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1 hour ago, Stormlover74 said:

Looks like another warm day with a few fall like days midweek. No rain for us through day 14 although eastern areas may do better

This week definitely isn't looking as cool as it did a few days ago as far as high temps. Now Thursday looks like the only really cool day with below average high temps in the mid 60s. Every other day our area will be up around 70, and then we go back to temps well up into the 70s on Saturday. 

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21 minutes ago, winterwx21 said:

This week definitely isn't looking as cool as it did a few days ago as far as high temps. Now Thursday looks like the only really cool day with below average high temps in the mid 60s. Every other day our area will be up around 70, and then we go back to temps well up into the 70s on Saturday. 

Probably due to the mostly sunny conditions and dry weather. Should see highs overperform and nights to be cooler than forecast. 

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14 minutes ago, bluewave said:

Very dry pattern continuing for the CONUS away from the track of Milton. 

 

IMG_1481.thumb.png.bc4b51f8c8638740358832750e89b4e8.png

IMG_1482.thumb.png.a02db0391aba87e3b52d6431c4628ecd.png

 

Hopefully we are getting this dry pattern out of the way now and pattern can shift to something more active for the cold months.  Pattern will flip at some point but to what and for whom is the question.

In the meantime that is a dry looking map, especially for this time of year.

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5 minutes ago, MANDA said:

Hopefully we are getting this dry pattern out of the way now and pattern can shift to something more active for the cold months.  Pattern will flip at some point but to what and for whom is the question.

In the meantime that is a dry looking map, especially for this time of year.

Tough to get much rainfall away from the tropical systems with so much record ridging and warmth over North America since late August.

IMG_1483.gif.fe1216699f6db6f44d06b56c98d77aa1.gif

 

 

 

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