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Cheat Sheet: What is a 'PDS' — aka weather forecasters' most extreme fire warning issued for Tuesday
Think of PDS or "particular dangerous situation" as the National Weather Service's Rolls Royce for fire weather.
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Ice Sheets Today
Credit: National Snow and Ice Data Center About these images: These images of the Antarctic Ice Sheet are static and do not update daily, but rather near the timeline of melt analyses posts. Learn ...