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January 2023


wdrag
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Rain will end tonight or early tomorrow. A general 0.50"-1.00" remains likely in the region. Readings will remain above normal through at least the weekend.

The lengthening measurable snow drought will persist in New York City and Philadelphia through at least the weekend. The next period of interest could be January 22-24. Ensemble support for measurable snow has fallen. The National Blend of Models shows no accumulations for New York City. A second storm could also impact the region a few days later.

A cooler pattern will likely develop during the last 5-7 days of January. The duration of this cooler period remains uncertain. Should ridging develop in the East, a warming trend could develop during in early February following a cool start to the month.

The ENSO Region 1+2 anomaly was -0.3°C and the Region 3.4 anomaly was -0.2°C for the week centered around January 11. For the past six weeks, the ENSO Region 1+2 anomaly has averaged -0.37°C and the ENSO Region 3.4 anomaly has averaged -0.82°C. La Niña conditions could fade to neutral conditions during late winter or early spring.

The SOI was +6.36 today.

The preliminary Arctic Oscillation (AO) was -2.221 today.

On January 17 the MJO was in Phase 1 at an amplitude of 0.561 (RMM). The January 16-adjusted amplitude was 0.616 (RMM).

Based on sensitivity analysis applied to the latest guidance, there is an implied near 100% probability that New York City will have a warmer than normal January (1991-2020 normal). January will likely finish with a mean temperature near 40.9° (7.2° above normal).

 

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17 minutes ago, Allsnow said:

It’s over…nyc will go 0.0 like Philly did 

Zero was my call for NYC Metro back when the predict snowfall totals thread was created. Based solely on stirring the pot, which it did. Back to back wins 

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A reminder about the EPS weeklies. Beyond two weeks, skill disappears. So, temperature or 500 mb patterns shown for weeks 3-6 could be dramatically different from the actual outcomes. So, right now February could start cool but not severely cold. Moderation will then follow. Afterward, it’s uncertain how things will evolve.

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