Image: Climate.gov
November 2020
🌎 While widespread La Nina conditions continue, there are signs of weakening in sight...
La Nina conditions have been in place since early Fall and have largely affected the American Southwest with drier-normal-conditions, and an increase in overall moisture in the Pacific Northwest and the Midwest. Upwelling warm sea surface temperatures have been observed within a zone of cooler temperatures in the central Pacific, which leads us to believe that La Nina will weaken completely by March/April 2021. What affect does this have on the 2020/21 Winter season? The general thinking is that typical La Nina conditions will continue through mid-February.

  • 🌡 Winter Temperature Forecast
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    🌡 The 2020/21 SWC Winter Temperature Forecast highlights below normal temperatures in the northern and Eastern United States through late February. Above normal temperatures will exist in the west and southwest through Spring 2021 as La Nina continues to be a significant influence on the overall weather pattern.
  • ❄ The SWC Winter Forecast has been released for the 2020-21 Season. Meteorological Winter starts on December 1, 2020 with the U.S. experiencing warmer than normal weather conditions. Our forecasters break down the details of how Winter will play out in your area.
  • ⚠️ U.S Advisory Layers
    SWC Weather Advisory Layers
    ⚠️ Click on real-time watch, warning, and advisory polygons for critical weather information. Allow the SWC location feature to plot your location on the map. Expand the map and visit all SWC Weather Layers.
  • 🧊 As Winter Weather impacts become more frequent across America, it's important to brush up on the basics. Let's review how you can prepare yourself and your family for the worst of Old Man Winter!
    📦 Pack an Emergency Supply Kit.
    📱 Charge all Communication devices.
    🚗 Winterize all family vehicles.
    📖 Get up-to-date weather reports.
    🙌 Share your travel plans with others.
    🛣 Monitor road conditions.
  • 📡 View the latest Goes-16 Visible Satellite image of the United States. This image will update every 5 minutes.
  • 🔥 As La Nina continues to control the overall pattern across the Western U.S., dry conditions are prevailing across Arizona, Utah, and New Mexico. These conditions are forecasted to continue through Winter 2020/21.