No wind data
Connect once to load the transport forecast.
Hazards
tap for what to doPlume transport
——
direction the air is carrying material
Mass-weighted average of the 850, 700 and 500 hPa winds — the layer that actually
carries a plume. Not the wind on your face, which can be almost exactly wrong.
This is a screen, not a fallout footprint.
Sites in range
| Site | Range | Bearing | Off-axis | Arrival |
|---|
Anything upwind of you sorts to the top; the rest follow by
distance. Off-axis is how far the transport bearing is from the one that would carry that site over you
— under 25° is flagged. Arrival is range ÷ transport speed. Sites beyond 300 km are not considered:
by then a plume has largely deposited and dispersed.
Indicators
Nothing here decides that for you. This tool never asserts that an
attack has happened; it reports facts and does arithmetic.
Corridor map
Next 48 hours
Each block is an hour. Shaded means something is upwind of
you in that hour. The line is the transport bearing. Computed from the cached forecast, so it keeps
working offline for as long as the forecast runs.
Azimuthal equidistant, centred on you. Bearings are true straight lines and the
rings are true distances, so the wedge means what it looks like. Vector basemap ships in the app —
no tile server, so it works with no network.
Dose clock
Needs no network, no feed and no signal. One timestamp gives the whole schedule.
Shelter planner
Getting from PF 5 to PF 40 is a weekend of moving furniture and costs nothing. It is worth
more than every item of kit combined.
What you have actually done
Which room, for which hazard
The best room is not the same for every hazard, and for some pairs it is the exact
opposite. Work both out now.
Sealing — for gas, smoke and chemical
The counterpart to protection factor. Mass stops gamma; sealing stops everything you
would breathe.
Estimated protection factor
—
Projected 14-day dose
at R1 = 500 R/hr
at R1 = 500 R/hr
—
Complete offline. No network needed from here on.
Household plan
Stored only on this device. Print it — in a two-week grid-down every phone in the house is
dead by day four and the sheet on the fridge is the system.