Cooperative Institute for Research in Environmental Sciences

Therese T. Ladwig

Research Interests

Storm Scale Data Assimilation

Ensemble Data Assimilation and Forecasting

Severe Weather

Current Research

I'm a member of the Rapid Refresh (RAP) and High-Resolution Rapid Refresh (HRRR) model and data assimilation team at GSD, which develops and transitions these systems to operations.  I lead the science and development of a hybrid variational-ensemble cloud assimilation in GSI.  I'm also involved with the development of storm-scale ensemble data assimilation for the HRRR Ensemble (HRRRE).  I'm proud that I contribute to an analysis and forecast system that is used by NWS forecasters, the aviation industry, and for renewable energy applications.  I am passionate about extreme weather and enjoy chasing tornadoes, white water kayaking, snow skiing, mountain hiking, and dancing in the rain.


Terra Ladwig, a scientist with NOAA's Global Systems Division in Boulder Colo., evaluates a forecast in the National Severe Storms Lab Hazardous Weather Testbed in Norman, Okla. as part of a collaborative research effort to improve severe weather forecasts. Credit: NOAA

Honors and Awards

  • 2015 Governor's Award for High Impact Research (group award)
  • 2016 CIRES Gold Medal Award (group award)
  • 2017 CIRES Technology Transfer Award (group award)
  • 2016 DSRC Outreach Gold Star
  • 2018 Technology Transfer Award (group award)

View Publications

  • Hu, M, SG Benjamin, TT Ladwig, DC Dowell, SS Weygandt, CR Alexander and JS Whitaker (2017), GSI Three-Dimensional Ensemble-Variational Hybrid Data Assimilation Using a Global Ensemble for the Regional Rapid Refresh Model. Mon. Weather Rev. Version: 1 145 (10) 4205-4225, issn: 0027-0644, ids: FJ6VM, doi: 10.1175/MWR-D-16-0418.1