Difficulties with both the AVN-based and MRF-based warm season temperature developments led us to look more closely at the characteristics of the 1000 mb temperature during recent model changes. Most importantly, the T170 version of the Global Spectral Model was implemented on June 15, 1998 at 12Z. An emergency implementation was made on July 21, 1998 at 12Z, in part to correct a warm bias over land. These diagnostics include model data interpolated to 329 stations in the CONUS and Alaska.

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Developer: Kevin L. Carroll