NWS Norman, OK - Upper Air Data

The upper air maps are updated twice a day. They are updated once in the morning (typically between 7am and 9am central time) - these are called the 12z maps. They are also updated once in the evening (typically between 7pm and 9pm central time) - these are called the 00z maps.

Upper Air Maps From Storm Prediction Center
Time	925 mb	850 mb	700 mb	500 mb	300 mb	250 mb
Morning Maps
Evening Maps

Additional Links

Upper Air Maps - current, unanalyzed, and archived maps from SPC
Upper Air Data - upper air maps, soundings, and wind profiler information from NCAR
Soundings - upper air soundings from across the United States from SPC
SPC Mesoanalysis - real-time objectively analyzed maps from SPC, with a focus on severe weather parameters
Composite Map - interactive map where you can overlay several different weather maps