Major Revisions

Updated the Preface.
Updated references throughout the handbook changing Notices to Air Mission (NOTAM) to Notice to Airmen (NOTAM).
In Section 2,
- Added NASA to the Aviation Weather Service Program description
- Added wording on WAFS grids
- Added CERAP to the Section 2.3.3 title
- Added Alaska’s new dedicated phone number information
In Section 3,
- Added new Section 3.3.3.4
- Changed “GTG” to “GTGN”, Added “GTG” to the Forecast section on Table 3-1
- Added “NDFD” to Table 3-1 and Table 3-2
In Section 4, added a note on Figure 4-1.
In Section 5,
- Added “For additional information on how temperature may affect flight performance, please see Chapter 8” to Section 5.1
- Removed reference to specific heat capacity to Section 5.7
- Removed “capacity” from the name and column heading on Table 5-4
- Removed “capacity” from the two paragraphs at the bottom of page 5-9
- Adjusted wording in Section 5.7 (first paragraph) to improve accuracy
In Section 15, added a new section on chaff and figure showing radar image of chaff.
In Section 16, added an enhancement to Figure 16-6 for clarity.
In Section 19, added wording for clarity in Section 19.2.2.
In Section 20,
- Changed SLD minimum size to 50 microns
- Deleted a reference to altitude in Section 20.4.1
- Replaced wording in Section 20.4.1 for clarity
In Section 22, added “Do not” to the front of #7.
In Section 23,
- Reworded Section 23.1’s introduction for clarity
- Updated language on our understanding of the physics of sunspots
- Updated language around magnetic fields
- Updated the range of frequencies of solar electromagnetic emissions
- Added a definition of corona
- Refined the description of the cause of an aurora
- Changes percentage of GCR flux for consistency with recent publications
In Section 24,
- Due to changes on the AWC website, language was updated and multiple figures were deleted
- Changed “sm” to “SM” in several locations.
- Deleted “, or Dust/Sand Whirl (Dust Devil)” from the first column in Table 24-2
- Added a note in Section 24.4.3.7 saying “Note: The link to the RVR website is located in Appendix G.”
- Deleted Section 24.6.1.5 and Figure 24-18, both are no longer used
- Updated Section 24.9.1 provided the new Weather Camera Program information
In Section 25,
- Added Analyzed Weather to the Introduction
- Removed reference to the AWC website
- Changed Figure 25-3 and 25-16
- Deleted graphic references no longer available
- Deleted Figures 25-25, 25-26, and 25-27
- Enhanced the description of the weather products that are used to generate CIP 2 changes
- Deleted “icing” from “AWC’s icing website”
- Changed Section 25.6’s title for clarity
- Corrected Section references in Section 25.5
In Section 26, deleted Figure 26-8 and all references to the figure.
In Section 27,
- Deleted references to the AWC GFA Tool
- Deleted Figures 27-1, 27-2, 27-33, 27-34, 27-35
- Deleted Section 27.12.3 and 27.12.4, sections renumbered
- Removed missing reference information from end of Section 27.12.3 sentence
- Deleted sentence referencing the AWC website
- Changed the typo at the end of Section 27.2.1.1.2 (4th line) under “Sample winds aloft text message” and top of next page from 550252 to 750252
- Updated PROB 30 wording to reflect NWS changes
- Added language around the use of temperature information from the LAMP/MOS product
- Added text “The NWS will continue producing text FAs for Alaska for the foreseeable future”
- Added language for clarity, deleted PIREPs from FIP sourcing, and removed bullets referencing CIP and FIP
- Added language around use of the LAMP product for destination forecast planning
- Removed “Implementation of additional levels are planned in 2024” and specific location in AWC website
- Removed references to FAs for Hawaii, Gulf of America, and the Caribbean
- Deleted Sections 27.6.4.2, 27.6.4.3, and 27.6.4.3
- Changed definition of heavy ice to Section 27.12
- Removed reference to CIP from Section 27.12
In Section 28,
- Deleted Figure 28-1 (and references to the figure), Figure 28-2, and Section 28.4
- Changed the HEMS Tool to Graphical Forecast for Aviation (Low Altitude, GFA-LA)
- Added language in Section 28.2 regarding the change from HEMS to GFA-LA
In Appendices,
- Appendix D: Added a reference to RVR in Table D-1
- Appendix E Added CERAP and GTG-N
- Appendix G: Added FAA Runway Visual Range (RVR) and multiple NWS Website URLs