Cloud Based (cb)-WoFS Forecast Viewer

Background fields

• Operational High Resolution Rapid Refresh Data Assimilation System (HRRRDAS), Global Ensemble Forecast System (GEFS), and High-Resolution Rapid Refresh (HRRR) run by the NOAA National Centers for Environmental Prediction Central Operations (NCO) and the NOAA ESRL/Global Systems Laboratory
• An 18-member forecast generated by applying perturbations from members 1-18 of the 0600 UTC GEFS forecast to the hourly output from the 1200 UTC HRRR forecast provides the boundary conditions for the cb-WoFS
• A 1-h, 36-member ensemble forecast launched from the HRRRDAS analysis provides the initial conditions for the cb-WoFS

cb-WoFS configuration

• 36-member, 3-km, WRF-based ensemble using the GSI-EnKF software package for data assimilation (DA) initialized at 1500 UTC
• 15-min DA cycling period with forecasts generated from cb-WoFS analyses
• Observations Assimilated: Conventional (prepbufr), OK Mesonet, MRMS REF/VEL, and CWP/Clear-Sky Radiance Data from the GOES-R Satellite
• Uses the NSSL 2-moment microphysics parameterization and the RUC Land-Surface Model with Radiation (Dudhia/RRTM or RRTMG/RRTMG) and PBL (YSU, MYJ, or MYNN) parameterization diversity

cb-WoFS forecast schedule

• 6-h (3-h), 18-member forecasts generated hourly (half-hourly) from 1700 UTC Day 1 - 0300 UTC Day 2

Real-time storm-scale data assimilation and forecasting experiments

• Hazardous Weather Testbed-Spring Forecasting Experiment (HWT-SFE): 2 May 2022 - 3 June 2022 (M-F and select weekend cases)
• Experimental cb-WoFS runs will also be utilized by various NWSFOs when available during signfiicant severe (i.e. hail, damaging winds, and tornadoes) weather and flash flooding events