- Manually-Digitized Radar Data for the Conterminous United States
The former Techniques Development Laboratory (TDL) of the U.S.
National Weather Service began collecting Manually-Digitized Radar
(MDR) data in November 1973 from teletype reports for the eastern
two-thirds of the United States. In 1978, TDL began archiving the
MDR on a new grid aligned with the output grid of the Limited Fine
Mesh (LFM) model, which was the model used for numerical weather
prediction at the time. The new MDR archive covered the entire
conterminous United States. As with the old MDR data, the new data
were archived in Model Output Statistics (MOS) predictand format to
support thunderstorm prediction. In addition to the "raw" MDR data,
TDL also created a gridded 20-nautical-mile-resolution MDR product.
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