Radar Trail

Every radar frame in a time window, stacked into one heatmap.

Time

Look back

Sample every

Ending at (blank = now)

Windows over 2 weeks Skip Nov–Mar (radar reads snow as rain) Hide ground clutter (echoes over 25% of the time)

Area

Center

Radius

View

Rainfall total
Estimated depth, from radar intensityHow often it rained
Share of frames with an echo: the low-opacity overlay, done order-independentPeak intensity
Strongest echo in the window, radar colorsStacked frames
Literally every frame drawn on top at low opacityFrame by frame
Step or play through single frames

Overlay opacity

Ignore echoes weaker than

Units

Map

Rainfall conversion

Reflectivity → rain rate Cap at 53 dBZ (hail filter)

Legend

Spot check

Click the map to read any point. Bars: radar strength at that spot over time.

Radar: NEXRAD national composite from theIowa Environmental Mesonet, 5-minute frames back to 2010. Totals are estimates from radar, not rain-gauge measurements: mountain blockage, hail, and light rain under the beam can all skew them.