Weather patterns are influenced by various factors, including ocean temperatures, atmospheric pressure systems, and natural climate oscillations. One key factor that has long been used to predict winter weather is the El Niño Southern Oscillation (ENSO). Currently, forecasters are predicting a weak to moderate El Niño event for the upcoming winter season. El Niño refers to the warming of sea surface temperatures in the eastern Pacific Ocean, which can have far-reaching impacts on global weather patterns.
The presence of El Niño typically leads to a milder winter across much of the northern United States. Warmer ocean temperatures in the eastern Pacific enhance the jet stream, diverting cold Arctic air northward. This means that regions in the northern states, such as the Midwest and Northeast, may experience above-average temperatures and less snowfall compared to a typical winter. However, it’s important to note that while El Niño can provide a general outlook, it does not guarantee specific weather conditions for every location.
Another factor that can affect winter weather is the Arctic Oscillation (AO). The AO is a large-scale atmospheric circulation pattern that can either strengthen or weaken the polar vortex—a low-pressure system over the Arctic region. A positive AO tends to keep cold air trapped within the polar region, resulting in milder winters for areas further south. On the other hand, a negative AO allows cold air to spill into lower latitudes, leading to colder and snowier conditions.
Currently, there are no strong indications of a pronounced negative AO for the winter of 2019. This suggests that widespread bouts of bitter cold and heavy snowfall may be less likely, especially in areas typically impacted by Arctic air masses, such as the Great Lakes region and the Northeast. However, this does not mean that these regions will be completely spared from winter’s wrath, as local weather systems can still produce bursts of wintry weather.
While these forecasts provide some general expectations, it’s important to remember that weather is inherently variable, and unexpected deviations from these patterns can occur. Climate variability and long-term climate change can also influence winter weather conditions. Rising global temperatures can lead to a decrease in snowfall and shorter winter seasons in many areas.
Ultimately, the next winter of 2019 is expected to be influenced by a weak to moderate El Niño, suggesting a milder winter with less snowfall. However, it’s crucial to remain vigilant and prepared, as weather conditions can change rapidly. Remember to stock up on winter essentials such as warm clothing, blankets, and emergency supplies, and stay updated with local weather forecasts to ensure your safety and well-being during the upcoming winter season.