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April is finishing with a mean temperature of 55.0° (1.3° above normal/2.0° above the earlier 1981-2010 baseline).

May will open with cooler than normal conditions. A shower is possible on Saturday as cooler air moves into the region. Sunday could be especially cool with highs only in the upper 50s to near 60° despite partly sunny skies. It could turn more springlike early next week with readings reaching the lower 70s on Tuesday and Wednesday. However the first 7-10 days of May will likely see temperatures average below normal overall.

The ENSO Region 1+2 anomaly was +1.5°C and the Region 3.4 anomaly was +0.7°C for the week centered around April 22. For the past six weeks, the ENSO Region 1+2 anomaly has averaged +1.47°C and the ENSO Region 3.4 anomaly has averaged +0.27°C. El Niño conditions will likely develop during late spring or early summer.

The SOI was -10.17 today. 

The preliminary Arctic Oscillation (AO) was +0.224 today. 

 

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