For a complete listing of TIN, PNS, and other change notifications from NWS, please see:
www.nws.noaa.gov/om/notif.htm or www.nws.noaa.gov/os/notification/list.php (for older notices)

Technical Notices by Project (click to expand)

  • MOS

      • TIN:16-31 Amended:Changes to GFS-based Model Output Statistics (MOS) Guidance effective on or about November 3, 2016
      • TIN16-15 Amended: Changes to North American Mesoscale Model (NAM)-based Model Output Statistics (MOS) Guidance Effective August 16, 2016
      • TIN 15-33 Amended: Changes to North American Mesoscale Model (NAM)-based Model Output Statistics (MOS) Guidance Effective on January 13, 2016
      • TIN 15-34 Amended: Changes to GFS-based Model Output Statistics (MOS) Guidance effective October 19, 2015
      • TIN15-33 Changes to North American Mesoscale Model (NAM)-based Model Output Statistics (MOS) Guidance Effective September 29, 2015
      • TIN15- 09 Changes to Global Forecast System (GFS)-based Model Output Statistics (MOS) Guidance
      • TIN14- 47 Amended Changes to GFS-based Model Output Statistics (MOS) Guidance
      • TIN13-30: Amended Update to GFS-based Model Output Statistics (MOS) Wind Guidance and resulting changes to LAMP wind guidance
      • TIN13-22: Amended New GFS MOS total sky cover and ceiling guidance for island locations in the tropical western Pacific
      • TIN13-20: Amended Addition of mean total sky cover to 1200 UTC extended-range GFS MOS text and BUFR messages
      • TIN 12-42: CHANGE IN LAND SURFACE MODEL IN GLOBAL FORECAST SYSTEM AND ASSOCIATED COOL AND MOIST BIAS IN NEAR SURFACE TEMPERATURE AND MOISTURE FIELDS
      • TIN 12-25: CHANGES TO GFS MOS WIND SPEED AND DIRECTION GUIDANCE EQUATIONS FOR THE WARM SEASON
      • TIN 11-16 Amended:Amended: Implementation Date Delayed: Changes to the North American Mesoscale (NAM) Analysis and Forecast System: Effective October 18, 2011
      • TIN 10-20: CHANGES TO SHORT- RANGE AND EXTENDED-RANGE GLOBAL FORECAST SYSTEM (GFS)-BASED MOS BUFR PRODUCTS
      • TIN 09-39: CHANGES TO GFS MOS GUIDANCE EQUATIONS
      • TIN 09-04: REMINDER: TERMINATION OF THE NGM AND NGM-BASED PRODUCTS
      • TIN 08-90: TERMINATION OF THE NGM AND NGM-BASED PRODUCTS
      • TIN 08-89: REPLACEMENT OF ETA-BASED MOS GUIDANCE WITH NAM-BASED MOS GUIDANCE
      • TIN 08-55: NEW GFS MOS TEMPERATURE AND DEWPOINT GUIDANCE FOR ISLAND LOCATIONS IN THE WESTERN PACIFIC OCEAN
      • TIN 08-10: ADDITION OF GFS-BASED MOS THUNDERSTORM GUIDANCE FOR ALASKA
      • TIN 07-42: CHANGES TO GFS-BASED MOS AND LAMP PRODUCTS
      • TIN 07-34: UPGRADE OF GFS- BASED SKY COVER GUIDANCE
      • TIN 07-07: NEW GFS MOS PRECIPITATION GUIDANCE FOR ISLAND LOCATIONS IN THE WESTERN PACIFIC OCEAN
      • TIN 06-48: REMOVAL OF OBSOLETE SHORT-RANGE GFS-BASED MOS BUFR PRODUCTS
      • TIN 06-40: IMPACT ON ETA BASED MOS GUIDANCE WITH IMPLEMENTATION OF NON-HYDROSTATIC MESOSCALE MODEL
      • TIN 06-33: UPDATE TO STATIONS IN GFS-BASED MOS BUFR PRODUCTS
      • TIN 06-32: UPDATE TO STATIONS IN GFS MOS TEXT PRODUCTS
      • TIN 06-21: CHANGES TO EXTENDED-RANGE GFS-BASED MOS WIND GUIDANCE
      • TIN 06-17: ENHANCEMENTS OF GFS-BASED MOS THUNDERSTORM PRODUCTS
      • TIN 06-16: ADDITION OF ALASKA GFS-BASED RFC MOS PRODUCT
      • TIN 05-59: CHANGE OF LOCATION IDENTIFIER FOR GLACIER PARK INTERNATIONAL AIRPORT, KALISPELL, MONTANA FROM KFCA TO KGPI
      • TIN 05-56: ADDITION OF NEW GFS-BASED GRIDDED MOS GUIDANCE
      • TIN 05-52: REMOVAL OF NGM-BASED MOS REDBOOK GRAPHICS
      • TIN 05-45: ADDITION OF NEW EXTENDED-RANGE GFS-BASED MOS BUFR PRODUCTS
      • TIN 05-43: ADDITION OF VISIBILITY AND OBSTRUCTION TO VISION GUIDANCE TO ETA MOS PRODUCTS
      • TIN 05-42: ADDITION OF EXTENDED-RANGE GFS-BASED MOS TEXT PRODUCT FOR THE 1200 UTC MODEL CYCLE
      • TIN 05-08: NEW SHORT-RANGE GFS MOS GUIDANCE FOR ISLAND LOCATIONS IN THE WESTERN PACIFIC OCEAN
      • TIN 05-07: ADDITION OF TWO SITES TO THE SHORT-RANGE GFS MOS GUIDANCE
      • TIN 04-59: REMOVAL OF NGM-BASED TRAJECTORY MODEL PRODUCTS
      • TIN 04-54: ADDITION OF GFS-BASED MOS MAXIMUM AND MINIMUM TEMPERATURE GUIDANCE FOR COOPERATIVE OBSERVER LOCATIONS
      • TIN 04-53: ADDITION OF NEW SHORT-RANGE GFS-BASED MOS BUFR
      • TIN 04-52: ADDITION OF NEW ETA-BASED MOS BUFR PRODUCTS
      • TIN 04-51: ADDITION OF ETA-BASED MOS WIND AND TEMPERATURE GUIDANCE FOR MARINE LOCATIONS
      • TIN 04-32: ADDITION OF AIR TEMPERATURE AND DEW POINT GFS-BASED MOS GUIDANCE AT MARINE LOCATIONS
      • TIN 04-31: CHANGE TO NGM MOS BUFR PRODUCTS
      • TIN 04-29: CHANGE TO STATION IDENTIFIER IN GFS-BASED MOS TEXT PRODUCTS
      • TIN 04-28: CHANGE TO GFS- BASED RFC MOS PRODUCTS
      • TIN 04-11: CHANGE TO THE PRODUCT DELIVERY SCHEDULE FOR THE EXTENDED-RANGE GFS MOS GUIDANCE PRODUCTS
      • TIN 04-09: CHANGES IN GFS MOS GUIDANCE FOR TOTAL SKY COVER, CEILING HEIGHT AND VISIBILITY
      • TIN 03-49: CHANGES TO ETA MOS GUIDANCE CONTENT AND STATION LIST
      • TIN 03-48: CHANGE TO ISSUANCE TIME OF ETA MOS GUIDANCE
      • TIN 03-44: ADDITION/DELETION/UPDATE OF STATIONS IN GFS MOS
      • TIN 03-43: ENHANCEMENTS TO GFS MOS GUIDANCE INCLUDING ADDITION OF SNOWFALL AMOUNT GUIDANCE
      • TIN 03-21: ADDITION OF MODEL OUTPUT STATISTICS GUIDANCE FOR WIND
      • TIN 03-04: REMOVAL OF OBSOLETE EXTENDED-RANGE MOS GUIDANCE ON THE NCEP GLOBAL FORECAST SYSTEM
      • PNS (July 2008): Soliciting Comments on the proposed replacement of Eta-based MOS products with NAM MOS products
      • PNS (July 2008): Soliciting Comments on the termination of the NGM and NGM-related products
      • PNS (June 2005): Soliciting Comments on removal of NGM-based Redbook Graphic Products
      • PNS (Oct 2004): Soliciting Comments on removal of NGM-based trajectory model
  • EKDMOS

      • TIN 16-32: Amended TIN16-32 Amended: Updates to Ensemble Kernel Density MOS (EKDMOS) effective November 3, 2016
      • Amended TIN 15-51Changes to Ensemble Kernel Density MOS (EKDMOS) effective January 6, 2016
      • TIN 15-51Changes to Ensemble Kernel Density MOS (EKDMOS) effective December 15, 2015
      • TIN 15-12 EKDMOS v1.0.0 Transmission Over SBN
      • TIN 12-28 EKDMOS v1.0.0 Implementation
      • PNS  Soliciting Comments for EKDMOS v1.0.0
  • LAMP

      • SCN 17-22 Updated March 31, 2017: Changes to LAMP and Gridded LAMP ceiling and visibility guidance and to the dissemination of GLMP wind gusts and probabilities of ceiling height and visibility effective April 3, 2017.
      • SCN 17-22: Updated: Changes to LAMP and Gridded LAMP ceiling and visibility guidance and to the dissemination of GLMP wind gusts and probabilities of ceiling height and visibility effective March 29, 2017.
      • TIN 15-41: AmendedChanges to Gridded Localized Aviation Model Output Statistics Program (LAMP) Effective Monday, October 19, 2015
      • TIN 15-41:Changes to Gridded Localized Aviation Model Output Statistics Program (LAMP)
      • TIN14-47 Amended: Changes to GFS-based Model Output Statistics (MOS) Guidance coinciding with the GFS model upgrade. 
      • TIN13-50: Amended (2): Changes to the Localized Aviation Model Output Statistics Program (LAMP) Products and addition of Convection Guidance and upgrade to Lightning Guidance
      • TIN13-50 Amended (1): Changes to the Localized Aviation Model Output Statistics Program (LAMP) Products and addition of Convection Guidance and upgrade to Lightning Guidance to postponing implementation until March 26, 2014
      • TIN 13-50: Changes to the Localized Aviation Model Output Statistics Program (LAMP) Products and addition of Convection Guidance and upgrade to Lightning Guidance: Comment period extended to January 16, 2014
      • TIN13-30: Amended: Update to GFS-based Model Output Statistics (MOS) Wind Guidance and resulting changes to LAMP wind guidance
      • TIN 12- 33: Impact of SREF Upgrade on Gridded LAMP products. 
      • TIN12-25: Amended: Update to GFS-based Model Output Statistics (MOS) Wind Guidance and resulting changes to LAMP wind guidance: Implementation postponed to June 12, 2012
      • TIN 11- 46: REPLACING CURRENT LAMP TOTAL SKY COVER WITH NEW OPAQUE SKY COVER, REDEVELOPED CEILING HEIGHT AND VISIBILITY, AND ADDING 119 NEW STATIONS
      • TIN 11-18: Change to Experimental Gridded Localized Aviation Model Output Statistics Program (LAMP) Products and Transition to Operations Effective June 21, 2011
      • TIN 09-39 Amended (2)  : CHANGES TO GFS-BASED MOS AND LAMP PRODUCTS POSTPONED TO MARCH 3 2010
      • TIN 09-39 Amended (1)  : CHANGES TO GFS-BASED MOS AND LAMP PRODUCTS POSTPONED TO FEBRUARY 9 2010 - UPDATE: POSTPONED UNTIL MARCH 3, 2010.
      • TIN 09-39 : CHANGES TO GFS-BASED MOS AND LAMP PRODUCTS
      • TIN 08-82 : ADDITION OF NEW CYCLES FOR GFS-BASED LAMP GUIDANCE
      • TIN 08-44 : ADDITION OF NEW CYCLES FOR GFS-BASED LAMP GUIDANCE
      • TIN 08-14 Amended: ADDITION OF NEW CYCLES FOR GFS-BASED LAMP GUIDANCE POSTPONED TO APRIL 8 2008
      • TIN 08-14 : ADDITION OF NEW CYCLES FOR GFS-BASED LAMP GUIDANCE
      • TIN 07-94 : REMOVAL OF NGM-LAMP GUIDANCE PRODUCTS FROM NWS WEB SITES AND FTP SERVERS AND REPLACEMENT BY THE LOCALIZED AVIATION MOS PROGRAM
      • TIN 07-48 : ADDITION OF NEW CYCLES FOR GFS-BASED LAMP GUIDANCE
      • TIN 07- 42: CHANGES TO GFS-BASED MOS AND LAMP PRODUCTS
      • TIN 07-13 : ADDITION OF NEW CYCLES AND STATIONS FOR GFS-BASED LAMP GUIDANCE
      • TIN 06-14 : ADDITION OF NEW GFS-BASED LOCALIZED AVIATION MOS PROGRAM GUIDANCE
      • PNS soliciting comments on Experimental LAMP Convection and Upgraded Lightning Guidance
      • PNS: Soliciting Public Comments for Experimental Gridded LAMP Products Through November 30, 2010
      • GFS LAMP Public Information Statement : Comment Request: Planned Termination of the NGM-Based LAMP Products by September 14, 2007
  • NBM

      • SCN17-59: Updated: Upgrade of experimental National Blend of Models guidance effective July 27, 2017, and request for comments
      • SCN 17-59: Updated upgrade of experimental National Blend of Model guidance effective July 11, 2017, and request for comments
      • TIN 16-33: Amended Implementation of experimental National Blend of Models guidance effective November 3, 2016, and request for comments
      • TIN 16-33:Implementation of experimental National Blend of Models guidance effective September 21, 2016, and request for comments
      • Amended TIN 15-50: Implementation of experimental National Blend of Models guidance for the CONUS effective January 6, 2016
      • TIN 15-50: Implementation of experimental National Blend of Models guidance for the CONUS effective December 15, 2015
  • NDFD

      • TIN15-28 Amended: Increasing Frequency of Updates to the National Digital Forecast Database (NDFD) Effective June 30, 2015
      • TIN14-38 Corrected: Extension of Forecast for the Snow and Ice Accumulation Grids and Significant Wave Height Grids in the National Digital Forecast Database (NDFD)
      • TIN14- 15: Amended:Increasing Resolution in the National Digital Forecast Database (NDFD)
      • TIN14-14: Combining fine resolution files in the experimental National Digital Forecast Database (NDFD) 
      • TIN13-42: Temporal Resolution of Forecasts for Hazards, Significant Wave Heights, Wind Direction, Speed and Gusts on the Oceanic Domain in the Experimental National Digital Forecast Database (NDFD) Will Increase 
      • TIN13-36: Amended: Temporal Resolution of Forecasts of Significant Wave Heights in the Experimental NDFD will Increase
      • PNS 2015 : Amended: Experimental Period Extended until July 31, 2016, for the Experimental Gridded Marine Offshore and High Seas Forecasts in the National Digital Forecast Database (NDFD)
      • PNS 2015 :Soliciting Comments on an Experimental Full Resolution National Digital Forecast Database (NDFD) eXtensible Markup Language (XML) Web Service for the Conterminous United States (CONUS) from September 29 2015, through
        February 1, 2016
      • PNS 2015: Soliciting Comments on an Experimental Precipitation Potential Index to be Added to the National Digital Forecast Database (NDFD) for the Conterminous United States (CONUS) from September 29, 2015, through December 31. 2015
      • PNS 2014 : AmendedAdjusting Issuance Times for Experimental Gridded Marine Offshore and High Seas Forecasts in the National Digital Forecast Database (NDFD)
      • PNS 2014: Comments Solicited from August 19, 2014, through November 30, 2014 on Experimental Tropical Cyclone Threat Grids Added to the NDFD
      • PNS 2014: Experimental Period Extended until at least March 31, 2015, for the Experimental Gridded Marine Offshore and High Seas Forecasts in the National Digital Forecast Database (NDFD)
      • SCN14-26: Discontinuance of the Experimental Cold Advisory for Newborn Livestock (CANL) Grid Element in the National Digital Forecast Database (NDFD), Effective May 27, 2014
  • Storm Surge (SLOSH, ETSS, P-surge)

      • SCN17-63: Updated: Extra-Tropical Storm Surge (ETSS) model upgrade and the first version of Probabilistic Extra-Tropical Storm Surge (P-ETSS) model Effective August 8, 2017
      • TIN15-39: Extra-Tropical Storm Surge (ETSS) model and post-processing upgrades: Effective September 15, 2015
      • TIN15-18: Extra-Tropical Storm Surge (ETSS) model and post-processing upgrades
      • TIN14-31 Amended:Extra-Tropical Storm Surge (ETSS) Enhancements
      • TIN14-12: Corrected: Experimental Probabilistic Tropical Cyclone Storm Surge and Tide above Datum Products Will Transition To Operational
      • TIN13-07: NWS Transitioning from Deterministic To Probabilistic Storm Surge Forecasts effective with the 2013 Hurricane Season (SLOSH)
      • TIN 09-21: TROPICAL CYCLONE STORM SURGE DISPLAY PROGRAM NOW ONLINE
      • TIN 08-98: ADDITION OF MORE LEVELS OF PROBABILISTIC STORM SURGE: EFFECTIVE MARCH 24 2009
      • PNS 14: Soliciting comments for Experimental Potential Storm Surge Flooding Map through November 30, 2014
      • PNS 13: Soliciting Comments on Experimental Probabilistic Tropical Cyclone Storm Surge and Tide above Datum Through November 30, 2013
      • PNS 10:  SOLICITING COMMENTS FOR EXPERIMENTAL TROPICAL CYCLONE PROBABILISTIC STORM SURGE EXCEEDANCE PRODUCTS THROUGH NOVEMBER 30 2010
      • PNS 09: SOLICITING COMMENTS FOR EXPERIMENTAL TROPICAL CYCLONE PROBABILISTIC STORM SURGE EXCEEDANCE PRODUCTS THROUGH NOVEMBER 30 2009
      • PNS 08: CORRECTED: SOLICITING COMMENTS FOR EXPERIMENTAL PROBABILISTIC HURRICANE STORM SURGE PRODUCTS THROUGH NOVEMBER 15 2008 AND EXPERIMENTAL STORM SURGE PROBABILISTIC GRIB2 FILES ON NOAAPORT
      • PNS 08: SOLICITING COMMENTS FOR EXPERIMENTAL PROBABILISTIC HURRICANE STORM SURGE PRODUCTS AND EXPERIMENTAL STORM SURGE PROBABILISTIC GRIB2 FILES ON NOAAPORT THROUGH NOVEMBER 15 2008
      • PNS 2007: SOLICITING COMMENTS FOR EXPERIMENTAL PROBABILISTIC HURRICANE STORM SURGE PRODUCTS THROUGH NOVEMBER 15 2007
      • PNS 2006: SOLICITING COMMENTS BY NOVEMBER 15 2006 ON EXPERIMENTAL PROBABILISTIC HURRICANE STORM SURGE PRODUCTS