TW1Analyst

Volume Render

3D Radar Storm Model

Select a radar station, then draw a box on the map.

WebGL2 ray-marched volume

Cross Section

Vertical Radar Slice

Select a radar station first, then press CROSS SECT.

Vertical radar cross section

Settings

Display & Rendering

General

Display & map controls

Radar, cross-section, and model rendering controls live in their own modes/panels.

Rendering

Radar Smoothing

Smooth the live Level II radar display. The amount is controlled in Radar Products.

Cross Section Smoothing

Smooth the vertical radar slice interpolation.

Map Overlays

Range Rings

Concentric range circles around the selected radar site.

Ring spacing

Velocity

Velocity Dealiasing

Unfolds velocity that wraps past the Nyquist limit (e.g. a real +58kt gate reading as -6kt). Experimental — turn off if you see stray flipped range bins or beams.

Storm Relative Motion

Subtracts storm motion from base velocity to help reveal rotation and inbound/outbound couplets.

Storm speed (kt) Direction (° from)

TW1Analyst

Model Guidance

HRRR · RRFS · more

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Model

High-Resolution Rapid Refresh — 3 km, CONUS

Field

Forecast parameter to display.

Region

Pans/zooms the map to this sector.

Model run

Initialization cycle.

Models Smoothing

0 is raw grid; 100 is ultra-smooth model interpolation.

Layer Opacity

85%

Forecast Hour

F00/18

Run —Z · Valid —Z

Legend

Data: NOAA HRRR via Iowa Environmental Mesonet

Satellite

GOES ABI · Iowa Environmental Mesonet

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Imagery

Satellite

GOES-East covers the Atlantic/CONUS; GOES-West covers the Pacific.

Product

True-color imagery by day, IR blend at night.

Layer Opacity

100%

GOES ABI / NOAA / Iowa Environmental Mesonet

History

Load an archived scan

Date & Time (your local time)

Date Time

Also fetch for that time

Local Storm Reports

Warnings

mPING Reports

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Radar Products

Select Moment

Radar Rendering

Radar Smoothing

0 is native Level II cells; 100 is ultra-smooth live radar.

Radar Opacity

Fade the live radar overlay.

100%

NEXRAD Level II

Legend

Symbols & Colors

Warnings

Tornado Warning

Severe Thunderstorm Warning

Special Weather Statement

Special Marine Warning

Reports

mPING Reports

NWS Local Storm Reports

TW1Analyst • Legend