Slayt 1 - RTC, Regional Training Centre - Turkey

Highlights 1996 – AVN/MRF changed to T126, 28 levels 1997 (February ) – Upgrade package implemented in the early and Meso Eta runs 1998 (February) – Early Eta upgraded to 32 km grid and 45 levels with 4 soil layers. OI analysis replaced by 3D-Variational Analysis (3D-VAR) method with new data sources 1998 (April) – (The Rapid Update Cycle (RUC) is a high-frequency weather forecast(numerical weather prediction) and data assimilation system) RUC (3-hourly) replacedby hourly RUC II system with extended CONUS domain40 km gird and 40 level resolutionAdditional data sources and extensive physics upgrades 1998 (June) – Meso Eta runs 4 times a day for North America domain at 32 km grid and45 vertical level resolutionUsed new snow analysisAll runs started from (Eta Data Assimilation System (EDAS) Eta Data Assimilation System(EDAS) has been run since 1995 and covers which is fully cycled for all variables 1998 (November) – Eta 03 UTC run moved to 06 UTC. 06 and 18 UTC productions run out to 48 hrs (instead of 33 and 30 hrs)