signalk-windjs/public/dist/leaflet-velocity.css

This plugin scrapes NOAA GRIB2 and makes them available in JSON format.

.leaflet-control-velocity {
  background-color: rgba(255, 255, 255, 0.7);
  padding: 0 5px;
  margin: 0 !important;
  color: #333;
  font: 11px/1.5 "Helvetica Neue", Arial, Helvetica, sans-serif;
}

.velocity-overlay {
  position: absolute;
  z-index: 1;
}