SharpJS v1.8.0 Update

1.8 - 2026-11-11

Added

• Light Mode: See your soundings in a new mode inspired by the SPC
• Over 40 new settings for hodographs and skew-t to increase customization of soundings
• PBL indicator based on SHARPpy calculations
• The fileLocation chart option for fetching and loading a CORS-accessible text sounding. viewable within main_urlparams.js
• Persistent, independent visibility settings for Skew-T overlays and hodograph components, plus
  configurable hodograph ring spacing and maximum height.
• The wetlift helper from the sharpjs/calc entry point.

Changed

• Sounding titles show latitude/longitude with hemisphere suffixes before the nearest-town text.
• The Display/Graphics controls are organized into Skew-T and hodograph groups, with a persistent
  dark/light theme.
• Updated parameter-inset colors and rendering for light mode, and refreshed tornado climatology tables.
• Effective-inflow bulk shear now uses the effective-layer shear calculation; the standalone
  URL-parameter entry configures its ACARS archive proxy.
• Settings schema version 2 migrates the former individual temperature-line settings into one
  temperature-lines visibility setting.
• Added new moist-adiabatic lapse rate lines
• Massive improvements to processing time (up to 5x faster)

Fixed

• Max percentile on Tornado climatology bounds now displays
• LCL/LFC/EL/MPL heights now respect parcel height and display truely
• Scaling for inset parameters are now consistant across panels

SharpJS v1.7.2 Update

1.7.2 - 2026-11-4

Added

• ACARS archive loading for the preceding six hours, with airport coverage mapping and a report time slider.
• A NEXRAD radar-site map for choosing the radar before loading its six-hour VWP archive.
• 3D Hodographs with an option to switch between Storm-relative arrows and clean.
• Sounding titles show the nearest mapped town, rounded distance in miles, compass direction, and state/province when available.

Changed

• The archive controls now surface the ACARS and VWP lookup workflow more directly through coverage maps and
  radar/airport selection rather than basic file picking alone.

Fixed

• STP, SCP, VTP, and other SRH-based controls use value magnitude for color thresholds, including negative left-motion values.
• Metric units apply to inset parameter temperatures (°C) and precipitable water (mm); heights remain in meters.

SharpJS v1.7.1 Update

1.7.1 — 2026-10-27

Added

• A GetSWV calculation API for streamwise and crosswise vorticity and streamwiseness.
• Optional EHI in wind boxes and HGZ/DGZ CAPE annotations on the Skew-T.
• Section-navigation buttons in the controls panel to make settings and analysis choices easier to find.
• Streamwise-vorticity diagnostics in wind parameter boxes and the vertical-profile display.

Changed

• Wind-layer SRH, shear, and mean-wind calculations now use the requested upper pressure bound instead of stopping 1 hPa below it.
• Lapse-rate calculations can return two decimal places and skip unneeded wind interpolation.
• Parcel calculations reuse environmental and virtual-temperature data while constructing the parcel profile and scanning for the LFC; Bunkers-motion calculations reuse an available effective-inflow layer.
• Persist the EHI and CAPE display options with the other chart settings.

Fixed

• Prevent negative layer contributions from reducing integrated parcel CAPE.
• Controls now switch between sections using navigation buttons rather than nested dropdowns.

SharpJS Official Open-Source Release v1.7!

1.7.0 — 2026-10-15

Added

• A BUFKIT station picker in the controls with a searchable, zoomable map. Station locations
  come from the bundled station catalog, while available station IDs are read from the IEM archive.
• A location inset on the hodograph showing OpenStreetMap tiles around the sounding, with a marker
  for the sounding location and map attribution.
• A UTC time slider for BUFKIT forecast hours and archived NEXRAD VWP volumes. BUFKIT slider
  selections update the forecast hour from the same file; VWP archives can be loaded for a chosen
  date and hour, covering the preceding three hours.
• Function documentation throughout the viewer engine and reusable canvas path/line helpers.
• SharpJS(element, props): one call draws an interactive sounding with its controls. Calling it again with
  new props updates the same chart. Several charts can share a page.
• Headless sharpjs/core: parseSounding, fromArrays, analyze, levelAt, exportSounding — runs in Node.
• Remembered settings with a versioned schema (localStorage, cookie, memory or a custom adapter). Presets can
  be pinned or left on automatic.
• Standalone site (app/) with sample soundings, drag-and-drop, and archive loaders for IEM RAOBs, IEM BUFKIT
  files and Unidata NEXRAD VWPs (sharpjs/sources). It remembers the last sounding.
• Reading BUFKIT files directly (column order from SNPARM, any forecast hour) and NEXRAD VWP files.
• TypeScript declarations, unit tests and browser tests.

Changed

• BUFKIT archive downloads now load and cache all forecast hours together, reducing repeat requests
  when selecting different hours from the same run. VWP location maps are shown in the panel above
  the wind-barb display, and VWP timeline playback is disabled.
• Bunkers right/left storm motions now use the parcel-based method described by Bunkers et al. (2014),
  with the SHARPpy non-parcel calculation retained as a fallback; related kinematic reference values
  and tests were updated.
• Updated parcel, layer-interpolation, thermodynamic, SRH, and severe-weather calculation logic as part
  of the analysis alignment and verification work.
• Updated package and chart versioning to v1.7.0 and refreshed repository links and release guidance.
• No hosted services, data or branding. Hosts set their own credit with brandLabel, savedBy and
  filePrefix.
• The map inset in the hodograph is now supplied by the host through mapImage (there was a Mapbox call).
• ACARS loading and the model/location pickers were removed; hosts pass their data in.
• Help text: arrow left/right on the Skew-T subtract/add 1 °C (the text had them swapped).

Fixed

• Corrected ECAPE supporting calculations, including storm-relative wind components and NCAPE
  integration over the sounding's height grid.
• Corrected parcel and thermodynamic edge cases in LCL, virtual-temperature, layer, and buoyancy
  calculations.
  • The Skew-T skew reset to Default on every full redraw.
• ECAPE and the custom 0–2 km SRH used the previous storm motion when a sounding was first drawn (often
  showing "--").
• A custom storm motion was replaced by 0°/10 kt whenever the chart fully redrew.
• Surface edits ignored zero values: 32 °F / 0 °C kept the old temperature, 0 kt became 10 kt, a north wind
  became 180°.
• A height-based custom lapse-rate layer was recomputed as if its heights were pressures after a redraw.
• CM1 export wrote heights above sea level instead of above ground.
• GetSRH(..., "Hght") threw a ReferenceError; ecape_parcel used Python's True as a default value.
• Loading a sounding while comparisons were shown passed them as "ghost" soundings.
• Reading a CM1 file overwrote the chart's parameter state.