Himalaya Nowcast Atlas

Himalaya Nowcast Atlas

Radar tracked forward by optical flow for eight hours, the model's pressure, rain and snow line, live airport reports, river flow, and the seasonal shape of the mountains: tree line, snow, snow leopard range and fruiting belts. Kashmir to Arunachal, 72–97°E.
Shaded relief of the Himalaya from Kashmir to Arunachal Pradesh
Move over the map for elevation, land cover, snow and rain at that point.
Radar extrapolation confidence

Next eight hours, town by town

Radar onset is the first extrapolated step with echo of 25 dBZ or more within about 7 km. Model rain is the sum of the forecast's hourly rain from now to +8 h. Select a town to zoom to it.

What happens when

    Ground truth: airport reports

    METARs from aviationweather.gov: the latest report in the last 3 hours from each airport within about 60 km of mountains over 1,500 m. Hover a station on the map for the raw report. IMD and Nepal DHM automatic stations publish only through their websites and aren't included.

    Rivers: flow against normal

    Modelled discharge from GloFAS v4 (via the Open-Meteo Flood API), not a measured river stage. Grey band: 10th–90th percentile of the same calendar days over the last 15 years; line: last 60 days and 7-day forecast. Lake levels have no free live source, so lakes show extent only.

    Seasons

    snow line by month, per sector

    fruiting calendar (select a fruit to show or hide it)
    snow leopard band

    Modelled habitat, not an observed range map: rugged ground (slope 12° or more) of open alpine types (shrub, meadow, steppe, rock) within the month's elevation band. The band follows wild sheep and ibex, higher in summer and down toward the tree line in winter.

    Tree line and shrub line

    Hindu Kush Himalaya data (ICIMOD)

    glacial lake outburst floods on record, by decade
    reported landslides and deaths, by year

    Sources and method