Features
Everything, from the source
HookEcho talks straight to the public NOAA, NWS and MRMS feeds from your own machine. No account, no subscription tier holding a product back, no telemetry. Here is what that gets you — each section opens the real app on the thing it describes.
Level 2, every tilt
The volume, not a picture of it
HookEcho decodes the raw Level 2 volume from the radar itself: every elevation angle in the scan, at full range and full gate resolution, not a pre-rendered image of the lowest tilt. Step up through the tilts to see how a storm leans, or put four of them on screen at once.
Open the radar
Velocity and dual-pol
Rotation, debris and hail, called by name
Velocity with dealiasing and a storm-relative view for spotting couplets, plus the full dual-polarization set — ZDR, CC, KDP and differential phase — which is how a debris ball and a hail core stop looking like the same red blob.
Open storm-relative velocity
The whole country
MRMS mosaic, rotation tracks and hail
The national MRMS mosaic at full resolution, with the derived grids that come with it: rotation tracks showing where a mesocyclone has been, MESH hail size, and QPE rainfall totals for the flooding question.
See the mosaic
Warnings and alerts
Every warning polygon, and a phone that tells you
Live watches and warnings with their full text, storm reports as they come in, and spotter positions — drawn on the map rather than buried in a list. Set a rule for your own location and the app tells you when a polygon covers it.
How alerts work
Storm interrogation
Cells ranked by how dangerous they look
Every cell in view, sorted by a severity score built from ProbSevere, rotational velocity and hail size, so the one worth watching is at the top. Click one for its history, or cut a vertical cross-section straight through it to find the overhang and the BWER.
Interrogate a storm
Models and soundings
HRRR, NAM and the severe parameters
Model fields drawn over the same map as the radar, with Skew-T soundings and the severe composite parameters — CAPE, shear, STP, helicity — so the forecast and the radar are one screen instead of two tabs.
Open the models
Tropical
NHC tracks, cones and advisories
Hurricane forecast tracks and cones from the National Hurricane Center, with the advisory text alongside, over the same radar you use for everything else.
Open the app
Archive and offline
Any storm since 1991, and no signal required
Scrub back through the NOAA archive to any volume since 1991 and replay an event with its warnings and reports time-synced. Or build an offline chase pack ahead of time, for the part of the day when the data connection is the thing that fails.
Getting started
On Android
The same radar, in the field
Not a stripped-down companion app: the Android build reads the same Level 2 volumes and draws the same products, with a layout built for one thumb. Home-screen widget, quick settings tile, and warning notifications for where you actually are — which, when you are chasing, keeps changing.
Get the Android build
Try it before you download anything
The browser version is the whole app, on live data, with nothing to install.