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NWS Directives System

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The Weather Service Operational Manuals (WSOM) documents below are for reference purposes only. Current Weather Service policies and procedures are available at NOAA's Nationl Weather Service Directives System web site.

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PART A - GENERAL
NA010686 Use of Standardized Terms in Policy Statements
NA018404 Directives System
NA027045 National Weather Service Mission
NA069308 Policy and Guidelines Governing National Weather Service and Private Sector Roles
NA060400 Clarifies Section 5 of Weather Service Operations Manual (WSOM) Chapter A-06
NA100188 Operational Proficiency for AFOS and RTA Operators
NA100791 Automated Program Accomplishment Reporting (APAR)
NA112770 National Weather Service Mission Statement
NA119212 Documentation of Station Programs and Facilities
NA128614 Station Hours of Operation
NA130601 Reporting Systems, Equipment, and Communication Outages
NA130380 Station Duty Manual
NA138613 Station Duty Manual
NA149505 Maintenance Record
NA157101 Station Library
NA178012 Emergency Drills
NA187013 Operating Nonfederal Equipment
NA197422 Revised Chapter A-19, Reporting of Weather Modification Activities.
NA200793 Revised Policy on AFOS System Management
NA208416 AFOS Program Management
NA218809 NWS Configuration Management for Operational Systems
NA219201 Appendix B, Data Review Group Terms of Reference, Revision 2
NA319709 Integrated Logistic Support Planning
NA339105 Use of Loaned or Donated Equipment
NA349003 Equipment/Facilities Program
NA367037 Equipment Replacement
NA409908 Service Change Process
NA450011 Occupational Safety and Health Policy
NA460012 A-46, National Weather Service Environmental Compliance Policy
NA509106 NWS Office Automation Policy and Guidelines
NA516813 User Services Program
NA551082 Relationships with Private Weathercasters
NA557824 Policy on Industrial Meteorology
NA607031 Field Station Organization
NA618121 Staffing Standards and Management Policies, Revision 1
NA627801 Field Office Management and Manpower Utilization Survey (FOMMUS)
NA639001
WSOM Chapter A-63, Program Evaluation.
NA639907 Service Evaluation
NA739207 Systems Commissioning Policy
NA749211 Systems Decommissioning Policy
NA990399 General National Weather Service Definitions
NA990499 Modification for AWIPS Commissioning to Designated WSOM Chapters
NA990689 Identification of Individuals Preparing NWS Products
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PART B - DATA ACQUISITION
NB100298 NWS Barometry (see also B-11, B-12, B-66)
NB100799 Policy and Procedures for Precision Digital Barometer Comparisons (see also B-11, B-12, B-66)
NB110799 Policy and Proceduress for Precision Digital Barometer Comparisons (see also B-11, B-12, B-66)
NB108202 Surface Observing Program (Land)
NB118209 Standards and Procedures for Surface Observing Program
NB120485 On-Station Retention of Surface Observations Records
NB120799 Policy and Proceduress for Precision Digital Barometer Comparisons (see also B-11, B-12, B-66)
NB128216 Standards and Procedures for Basic Weather and Synoptic Observation Programs at NWS Stations
NB130401 Federal Aviation Non-Federal Observations Program
NB137519 Standards and Procedures for Surface Observing Programs at FAA Facilities
NB148508 Supplementary Aviation Weather Reporting Stations
NB140389 Use of Government Facilities and/or Equipment by SAWRS Cooperators
NB158610 Paid and Non-Paid Basic and Synoptic Surface Stations
NB167702 Marine Reporting Stations (MARS)
NB170781 Claims for On-The-Job Injuries to Contract/Substation Observers
NB179301 Cooperative Station Management
NB188409 Agricultural Weather Stations
NB198210 Fire Weather Observation Stations
NB218205 Severe Storm Reporting Networks
NB240492 Interim Procedures for Manual Observations with the Implementation of ASOS
NB309204 Voluntary Observing Ship Program
NB407605 Upper Air Stations
NB458111 Balloon Inflation with Hydrogen
NB500386 Policy Guidelines for Monitoring RRWDS Data Signals
NB501581 Policy for Allowing Non-Government Users to Access National Weather Service Radar Data
NB550499 Distribution and Use of Satellite Data
NB558510 Distribution and Use of Satellite Data
NB600285
Quality Control of  Surface Observations
NB608301
Observational Quality Control - General.
NB609906 Observational Quality Control - General
NB610009 Certification of Observations
NB618802 Certification of Observers, Revision 1
NB660799 Policy and Proceduress for Precision Digital Barometer Comparisons (see also B-11, B-12, B-66)
NB668410 Visitation Procedures - NWS Surface Observation Sites
NB669807 Inspection Procedure Guideline - Surface Observation Sites
NB678801 Visitation Procedures -- Upper Air Stations
NB688611 Visitation Procedures -- Radar Stations
NB737307 Visitation Procedures -- Substations
NB907705 Special Warning Program Observations
NB980180
Reporting Sunshine Data
NB991278 NWS Participation in Runway Visual Range (RVR) Program
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PART C - BASIC/PUBLIC WEATHER SERVICES
NC010496 Limited Public Service at WSOM
NC058114 Release of Forecasts by Other Federal Agencies
NC097136 Weather Forecast Improvement Program
NC100499 State Forecasts
NC109208 State Forecasts
NC110105 WSOM Chapter C-11, Zone Forecasts
NC110495 Ultraviolet Index (UVI) Forecasts
NC110499 Zone and Local Forecasts
NC118411 Zone and Local Forecasts
NC119605-1 Appendix A, Zone Forecast Maps to WSOM Chapter C-11
NC119605-2 Appendix A, Zone Forecast Maps to WSOM Chapter C-11
NC129501 Climate Outlooks
NC200495 Ultraviolet Index (UVI) Forecasts
NC200695 National Weather Summary, Canadian Urban Forecasts and Additions to the Foreign Temperature and Weather Table
NC209209 National Public Weather Products
NC210007 An update to page 13 of WSOM Chapter C-21, Local and Regional Statements, Summaries, and Tables.
NC210499 Local and Regional Statements, Summeries, and Tables
NC210598 Short Term Forecast
NC210900 Climatological Reports (CLI - CSUS2) Standard Formats
NC219210 Local and Regional Statements, Summaries and Tables
NC308318 Air Pollution Weather Forecasts
NC319600 Cancellation of WSOM Chapter C-31, Winter Sports Service.
NC400198 Reformatting short-fuse warnings to a standard bullet style format (see also E-20, D-51, D-52)
NC400300 Use of Descriptive Phrases in Warnings, and reformatting Severe Weather Statements
NC400397 Reformatting Public Watch Narrative and Changing EBS Activation to EAS Activation
NC400499 Severe Local Storm Watches, Warnings, and Statements
NC409502 Severe Local Storm Watches, Warnings, and Statements
NC419703 Tropical Cyclone Program
NC419903 Tropical Cyclone Program
NC410499 Tropical Cyclone Program
NC410104 WSOM Chapter C-41, Tropical Cyclone Program.
NC410008 Chapter C-41, Tropical Cyclone Program.(superceded by NC410104)
NC420498 Winter Storm and Non-Precipitation Weather Hazards Product Procedures, Content, and Formats, see also C-44
NC420499 Winter Weather Warnings
NC420594 Frosts and Freezes
NC420888 State Forecast Discussion (SFD) Format
NC421101 Weather Update to Winter Warning Policy
NC429205 Winter Weather Warnings
NC430499 Coastal Flood Program
NC430701 Lakeshore Flood Products - Filed with C-43
NC439311 Coastal Flood Program
NC440499 Non-Precipitation Weather Hazards
NC449206 Non-Precipitation Weather Hazards
NC450197 Discontinuance of the Hemispheric Map Discussion; Cross Ref for Prognostic Discussions for Monthly and Seasonal Outlooks
NC450499 Meteorological Discussions and Forecast Coordination
NC459412 Meteorological Discussions and Forecast Coordination
NC479313 County Warning Areas
NC479804 Appendix A to WSOM Chapter C-47, County Warning Areas
NC470499 County Warning Areas
NC490002 Warning Coordination and Hazard Awareness Program
NC499110 Warning Coordination and Hazard Awareness Program.
NC500001 Customer and Partner Outreach
NC600288 Routine Direct Commercial Radio Broadcasts
NC608016 Radio / TV Dissemination
NC610678 Telephone Dissemination
NC611479 Policy on Answering Public Service Telephones
NC617707 Telephone Dissemination
NC627809 Newspaper Dissemination
NC630499 NOAA Weather Wire Service Dissemination
NC630590 Retention of Hard Copy of NOAA Weather Wire Service
NC638910 NOAA Weather Wire Service Dissemination
NC649113
NOAA Weather Radio (NWR) Program
NC640499 NOAA Weather Radio (NWR) Program
NC640698 NOAA Weather Radio (NWR) Operator Proficiency Program
NC649809 WSOM Chapter C-64, NOAA Weather Radio (NWR) Program
NC660280 Agreement for Transmission of Warning Messages on NWR and NWWS Systems
NC667908 Dissemination of Public Warnings
NC720499 National Watch/Warning Verification Program
NC721188
National Watch/Warning Verification Program
NC722080 National Watch/Warning Verification Program
NC728701
National Watch/Warning Verification Program.
NC730499 Public/Aviation Forecast Verification
NC738507 Public/Aviation Forecast Verification.
NC750006 National Verification Program
NC750700 Verification of Coastal Flood and Lakeshore Flood Warnings
NC750800 Add Great Lakes to National Marine Verification Program (NMVP)
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PART D - SPECIALIZED WEATHER SERVICES
ND057525 Agricultural Weather Service Program
ND060395 Duties of Incident Response Meteorologist Requiring Exposure to Hazardous Situations
ND060499 Fire Weather Service Program
ND069111 Fire Weather Service Program
ND070499 Marine Weather Service Program
ND079115 Marine Weather Service Program
ND200194 Changes to the Aviation Area Forecast (FA) and AIRMET Programs
ND200199 Backup of Aviation Weather Center In-Flight Advisory Products
ND200294 Alaska Area Forecasts (FA) and AIRMET Format Changes
ND200497 Aviation Area Forecasts
ND201192 Rescission of Option to Delay Issuance of Area Forecast (FA) and Provision of and Alternate Procedure
ND209403 Revised Table of Contents, and Exhibit D-20-4, Forecast Area in the Gulf of Mexico, on page 8, of Issuance 91-3, WSOM Chapter D-20, Aviation Area Forecasts.
ND220194 Changes to the Aviation Area Forecast (FA) and AIRMET Programs
ND220199 Backup of Aviation Weather Center In-Flight Advisory Products
ND220597 In-flight Aviation Weather Advisories
ND229107 In-flight Aviation Weather Advisories
ND237911 Special Aviation Forecasts and Events
ND248118 Wind and Temperature Aloft Forecasts
ND240483 Wind and Temperature Aloft Forecast Amendment Responsibility
ND250499 CWSU Support to Air Traffic Facilities
ND259606 Support to Air Traffic Facilities
ND260192 Airport Weather Warning Risk Reduction
ND260499 Aviation Weather Warnings and Pilot Briefings
ND261392 Pilot Weather Briefings Which Use Data from Automated Observing Systems
ND277301 In-Flight Reports from Pilots (PIREP's)
ND300499 Transcribed Weather Broadcast Text Products
ND300798 Transcribed Weather Broadcast Text Products
ND309704 Transcribed Weather Broadcast Text Products
ND310499 Aviation Terminal Forecasts
ND319705 AVIATION TERMINAL FORECASTS
ND319806 Page and appendix changes for Weather Service Operations Manual (WSOM) Chapter D-31, Aviation Terminal Forecasts
ND320085 Cancellation of Weather Service Operations Manual, Chapter D-32
ND350789 International Aviation Area Forecasts
ND357511 International Aviation Area Forecasts, Revision 1
ND367823 International Aviation Service Arrangements
ND360984 International Aviation Service Arrangements
ND380199 Backup of Aviation Weather Center In-Flight Advisory Products
ND380390 International Aviation In-Flight Advisories
ND380391 International Aviation In-Flight Advisories
ND380693 International Aviation In-Flight Advisories
ND380889 International Aviation In-Flight Advisories
ND388805 International Aviation In-Flight Advisories
ND390108 Airport Weather Warning
ND407601 Agricultural Weather Service Products
ND428119 Fallout Winds
ND510010 Pen and ink changes for Appendix B to WSOM Chapter D-51, Marine Services for Coastal, Offshore, and High Seas
ND510004 Replacement for Appendix B to WSOM Chapter D-51
ND510100 Implementation of NAVTEX Product
ND510200 Transfer of Offshore Forecast Responsibility
ND510500 Add 48 and 72 Hour Tropical Cyclone Forecast Positions to the High Seas Forecast (HSF).
ND510991 Implementation of the Use of Generic Codes in the Coastal Marine and Great Lakes Forecasts
ND510193 Implementation of the Use of Universal Generic Codes (UGC) Marine and Great Lakes Watches, Warnings, and Statements.
ND510499 Marine Services for Caostal, Offshore, and High sEAS
ND511000 References: Marine Services for Coastal, Offshore, and High Seas, 94-2, dated March 21, 1994, and WSOM Chapter D-52, Marine Services for the Great Lakes, 91-2, dated March 29, 1991.
ND510198 Reformatting short-fuse warnings to a standard bullet style format (see also C-40, E-20, D-52)
ND510300 Use of Descriptive Phrases in Warnings, and reformatting Severe Weather Statements.
ND519402 Marine Services for Coastal, Offshore, and High Seas
ND519710 Appendices to Chapter D-51, Marine Services for Coastal, Offshore and High Seas
ND520006 Great Lakes Ice Program
ND520196 Warning and Forecast Marine Areas of Responsibility for NWS Great Lakes Offices
ND520295 Great Lakes Forecast Header Change & Current/Modernized Marine Areas of Responsibility for NWS Great Lakes Offices
ND520300 Use of Descriptive Phrases in Warnings, and reformatting Severe Weather Statements.
ND520701 Lakeshore Flood Products - Filed with C-43 and D-52
ND521098 Coastal Basic Marine Areas
ND520107 Pen and Ink Changes to OML 10-98 - ND521098
ND520198 Reformatting short-fuse warnings to a standard bullet style format (see also C-40,E-20, D-51 )
ND520301 WSOM Chapter D-52, Transmittal Issuance 91-2, dated March 29, 1991.
ND520499 Marine Services for the Great Lakes
ND520599 Changes in the Open Lake Forecast Product
ND529102 Marine Services for the Great Lakes
ND799411 National Weather Service Flight Operations
ND800110 Rescindment of WSOM Chapter D-80, Forecaster Familiarization Flights (Aviation)
ND820103 WSOM Chapter D-82, Training Program for Pilot Weather Briefers.
ND820892 WSOM Chapter D-82, Training Program for Pilot Weather Briefers
ND829010 WSOM Chapter D-82, Training Program for Pilot Weather Briefers
ND837419 Aviation Weather Seminars and Flight Safety Clinics
ND900499 Weather Support for Accident Investigations and Litigations
ND909702 Weather Support for Accident Investigations and Litigation
ND918316 State Aviation Liaison Official (SALO) Program
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PART E - HYDROLOGIC SERVICES
NE018906 Hydrologic Service Program
NE020189 Coordination of Changes in Values of Critical Gage Height or the Zero Elevation of River Gages
NE028015 Hydrologic Program Management
NE027408 Management of Flash Flood Program
NE030003 Geographic Areas of Responsibility
NE039002 Geographic Areas of Responsibility
NE048011
Hydrologic Services Manual
NE057014 Policies on Special Hydrologic Services and Agreements
NE067703
Quantitative Precipitation Forecasts Used for River Forecasts
NE078001
National Weather Service River Forecast System (NWSRFS) Practices
NE110101 Use of QPF and Production of QPE by River Forecast Centers
NE111100 Coordination of Flash Flood Guidance Across River Forecast Center Boundaries
NE110699 RFC Hours of Operation
NE110899 Operational Interactions with Hydrologic Cooperators
NE116817
Teletypewriter Messages, Message Format, Content, and Terminology
NE119902 River Forecast Center (RFC) Operations
NE121001 Significant River Flood Outlook Product
NE129904 River Forecast Center Products and Services
NE200198 Reformatting short-fuse warnings to a standard bullet style format (see also E-20, D-51, D-52)
NE200300 Use of Descriptive Phrases in Warnings, and reformatting Severe Weather Statements
NE208116 Hydrologic Reporting Networks
NE209004 Flood/Flash Flood Watch and Warning Program
NE210201 Weather Forecast Office Production of QPF and Snow-pack Modeling Temperature Forecasts
NE210999 Operational Interactions With Hydrologic Cooperators
NE219901 Weather Forecast Office Hydrologic Operations
NE220109 WSOM Chapter E-22, Weather Forecast Office Hydrologic Products.
NE240005 Weather Forecast Office Hydrologic Services Manual
NE240494
Areal Identifiers Used in RFC Flash Flood Guidance Products
NE300111 Cancellation notice for WSOM Chapters E-30, Public Dissemination, WSOM E-32 Office of Emergency Planning and Red Cross, WSOM E-40 NOAA Publications Containing Hydrology Data
NE308007 Public Dissemination
NE319104 National Operational Hydrologic Remote Sensing Center.
NE338607 River Forecast Center Gateway Computer System
NE407313 NOAA Publications Containing Hydrologic Data
NE408506 Local Flood Warning Systems
NE417312 Collection and Processing of Hydrologic Data
NE420501 Issuance of a Standard Daily River and Lake Summary Product (RVD)
NE421492 New ASOS, WSR-88D, and SNOTEL Hydrologic Data Products
NE429008 Types of Hydrologic Products
NE607205 Administrative Reports
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Part F - CLIMATOLOGICAL AND OCEANOGRAPHIC SERVICES
NF011183 Addition to Section 4 of Climatological Service Program Text
NF018305 Climatological Service Program
NF118322 Weekly Weather and Crop Summary Messages and Associated Reports, Revision 1
NF210393 Monthly Means and CLIMAT Messages Using the Automated Surface Observing System
NF218706 The CLIMAT Program
NF220493 Local Climatological Data, Preliminary and Annual Summary
NF228311 Local Climatological Data, Preliminary and Annual Summary
NF308203 Public Service - Climatological
NF420396 Changes associated with NWS Modernization, Paradox StormData II software
NF429405 Storm Data and Related Reports
NF420595 Extending the Storm Data Submission Deadline
NF509500 Cancellation of WSOM Chapter F-50, The Station Climatological Record Book
NF518306 Normals
NF609601 Tsunami Warning
NF600398 Change in Criteria for Tsunami Warnings in Alaska's Aleutian islands
NF610499 Earthquake Reports
NF619602 Earthquake Reports
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part g - COMMUNICATIONS
NG019302 Communications Program
NG079408 Radio Frequency Authorizations
NG208902 NOAA Weather Wire Service (NWWS)
NG219509 NOAA Weather Radio
NG229407 Family of Services
NG296959 Location Identifiers for Mexican Stations
NG309312 Facsimile Systems
NG319506 Automation of Field Operations and Services
NG329310
Radar Data Circuits
NG349409 Automated Surface Observing System Communications
NG519305 Telecommunications Service Priority
NG520394 Purchase and Maintenance of Amateur Radio Equipment
NG528205 Local Emergency Communications Planning
NG546707 NCS Emergency Communications Plan
NG617609 International Operations (Was G-06)
NG629309 World Weather Watch
NG929304 Marine Ship Report Telecommunications
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part h - ENGINEERING
NH018022 Engineering Program
NH108215 Facilities Engineering Program
NH111283 Review and Approval of Facilities Projects
NH117212 Facilities Planning and Programming
NH129707 Emergency Power Program
NH137113 Facilities Design Policies
NH508412 Equipment Maintenance Program
NH518221 Facilities Maintenance Program
NH528502 NOAA Weather Radio Maintenance Policy
NH538905 AFOS and RFC Peripheral Maintenance Policy
NH549801 Automated Surface Observing System Maintenance
NH808104 Engineering Training Programs
NH988703 Engineering Directions Subsystem, Revision 1
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part i - NWS CAREER DEVELOPMENT
NI018317 National Weather Service Training Policies and Responsibilities
NI067507 National Weather Service Technical Training Center (Was I-83)
NI077913 Scholarship Assignments (Was J-85)
  part j - OTHER
NJ029805 Significant Hydrometeorological Events, Post-Storm Data Acquisition, and Service Assessments
NJ039706 Backup Operations and site Evacuations
NJ050102 Backup Operations
NJ080183 National Plan for Radiological Emergencies
NJ500591 Sequence of Forecaster Development Program Training
NJ500186 Forecaster Development Program
NJ502774 Hydrologist & Hydrologic Technician Positions
NJ807509 Public Service Awards (Was I-80)
NJ817805
Manpower Utilization Councils
NJ820299 Delegation of Authority for Personnel Actions
NJ829803 Delegation of Authority for Personnel Actions
NJ938909 Procedures for Effecting Organizational Changes
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