NBM Version 4.3

• SCN 25-34 Service Change Notice for NBM v4.3 upgrade - May 19th, 2025
• PNS 24-75 Soliciting comments for NBM v4.3 upgrade - December 16th, 2024

4.3 Development

• Overview of Changes in NBM v4.3
• MDL Science Briefing to the NCEP Director - January 27th, 2025

NBM Version 4.2

• PNS 23-45 Public Information Statement requesting comments
• PNS 24-41 Service Change Notification

4.2 Development

• Upgrades and Improvements (PDF)
• Cobb Melting SLR Method (PDF)
• Initial Science Briefing (Sep 2023, PDF)
• Supplemental Science Briefing (Jan 2024, PDF)
• NBM v4.2 MEG Webinar (May 2024, PDF)
• Individual model cycle inputs per NBM cycle issuance (PDF)

Additional Resources

• NBM Training Modules
• NBM Presentations
• NBM Technical Notices
• NBM VLab Community (NOAA login required)
• Verification 
• NBM Experimental Quick-Look Graphics 
• Description of Field-Selected Algorithms for National Blend of Models