Surface Feature Tracks

In NWS Service Change Notice PNS17-17, OPC is proposing to limit the feature tracks depicted on surface charts. Currently, the charts include tracks and posistions for every low and high pressure system, extending back 24 hours (where applicable) and going forward 24 hours from the chart's valid time. The change OPC is proposing would limit the tracks and 24 hour positions to the following:

  • only show depictions 24 hours beyond the chart valid time,
  • exclude from low pressure systems with no warnings or developing warnings associated with them, and
  • exclude from high pressure systems.




Proposed surface chart Current surface chart

Click images to enlarge.

You may submit comments about the proposed change here.