DML/EL RINGS Meteograms
Five-day weather model output for the RINGS airborne surveys in Dronning Maud Land and Enderby Land (East Antarctica), from
the Antarctic Mesoscale Prediction System (AMPS, NCAR; WRF 8 km). A copy of the
MINIS Meteograms site, set up on 26 October 2026.
Site: https://vikramonice.github.io/dml-el-rings-weather/
Model output, not a forecast. The charts and notes are made automatically, with no forecaster
involved. They were first set up for a ground traverse near Maitri in Dronning Maud Land. They are
not tuned for this region or for flying. The wind-aloft numbers are shown as the model gives them,
without interpretation. For flight decisions use the official forecast and the station forecaster.
Sites (west to east)
| Site | Position | AMPS grid point | Note |
|---|
| PEA (Princess Elisabeth) | 71.950 S, 23.347 E | 3.6 km, model ground 1276 m | added 26 Oct 2026 |
| W1 | 69.5 S, 31.0 E | 2.5 km, 34 m | floating ice shelf (Bedmap3: 249 m of ice); added 26 Oct 2026 |
| S17 (skiway near Syowa) | 69.03 S, 40.09 E | 1.0 km, model ground 592 m | reference near the start of the flights |
| E1 | 68.0 S, 45.0 E | 4.7 km, ~500 m | |
| E2 | 67.5 S, 49.0 E | 1.6 km, ~410 m | |
| E3 | 66.0 S, 53.0 E | 4.0 km, ~360 m | |
| E4 | 66.5 S, 56.5 E | 4.2 km, ~350 m | 22 km west of the requested 66.5 S, 57 E, whose grid point is at the coast (60 m) |
The positions may change; each site keeps its file name (pea, w1, s17, e1 ... e4) so its history
continues. Sites are set in SITES at the top of amps/amps_meteogram.py.
Each meteogram shows temperature and wind chill, cloud by altitude and cloud base, snowfall, wind at
10 m, sea-level pressure, and wind aloft at 850, 700 and 500 hPa (arrows and knots, every 6 h).
Station check: Syowa (WMO 89532) reports every 3 h are compared with AMPS at Syowa's own grid
point (fetched for the check only; the cell is sea, the station is on an island). Molodezhnaya
(89542, near E1) reports are shown alongside.
Season: updates run until the end of February 2027 (SEASON_END in publish.py), then stop.
How the field weather notes are written: RULES.md. In this copy the rules specific to
Dronning Maud Land (the weather-pattern rules from the Maitri section of the handbook) are switched
off; the general thresholds remain.
How it updates
A GitHub Actions workflow (.github/workflows/update.yml) checks every 30 minutes while a new AMPS
run is due (09:00-12:00 and 21:00-00:30 UTC; runs finish about 10 h after 00/12 UTC).
publish.py reads the previous state from the gh-pages branch, fetches only the few hundred kB
of AMPS GRIB it needs (HTTP byte ranges), makes the charts, notes and station check, rebuilds the
page (the last 8 runs = 4 days) and force-pushes gh-pages as a single commit. A monthly
keep-alive stops GitHub disabling the schedule. Run it by hand from the Actions tab ("Run
workflow"); tick rebuild after changing the page template.
Map: static/map.jpg and amps/amps_sites_map_web.json, made by
code/python/fieldwork/amps_site_map_enderby.py in the Nivl project (MODIS Mosaic of Antarctica,
Bedmap3 coast and elevations).
Data: AMPS, NCAR, run for NSF. Station reports via ogimet.com.
