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NWS Weather Prediction Center Surface Analysis Charts:
Past 24 Hour Radar Overlay Continental US

Note: Times are Zulu (UTC, currently 1808)
Dec 20:  1800Z | 2100Z | Dec 21:  0000Z | 0300Z | 0600Z | 0900Z | 1200Z | 1500Z
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Hour 18

These maps are updated about 2 hours after their indicated analysis time.

(The next updates will be the 1800Z maps at about 2000Z.)

Maps and Data Courtesy of NOAA NWS Weather Prediction Center North American Surface Analysis.
Script by SE Lincoln Weather.