Intersite Coordination

Sites configure the sending and receiving of ISC grids with localConfig.py. They can configure the following functionality:

Whether or not to receive ISC grids
From which sites to receive ISC data
Which weather elements your office desires from other offices (can receive grids from RFCs, WFOs, and/or National Centers)
Whether to send ISC grids when saving/publishing

All WFOs need to receive ISC grids. In order to receive ISC grids, the REQUEST_ISC parameter (shown below) MUST be overridden in localConfig.py if it is not set equal to one (i.e., enabled) in masterConfig.py or serverConfig.py. Enabling the REQUEST_ISC parameter registers your site with the ISC Routing Table (IRT).

Request ISC Example

In serverConfig.py, the REQUESTED_ISC_SITES list is set to "None". This setting means EDEX automatically determines which offices are included in your office's Spatial Editor/Site's Domain and requests ISC grids from those offices. If your office's Spatial Editor/Site's Domain covers even a tiny part of an offices forecast area, you receive ISC grids from that office. This is true for like office-types only. At a WFO, EDEX only determines which WFOs are in the Spatial Editor/Site's Domain. It cannot determine which RFCs are in the office's Spatial Editor/Site's Domain. Configure the REQUESTED_ISC_SITES list locally to request RFC grids. Typically, the default setting includes more offices than a site needs. Adding a REQUESTED_ISC_SITES list in localConfig.py allows offices to trim the offices from which they receive ISC grids. This reduces ISC traffic, which improves system performance. If you configure REQUESTED_ISC_SITES locally, be sure to include your office in the list. Otherwise, your ISC grids will not be added to your local database.

Requested ISC Sites Example for LIX

Offices can restrict the weather elements for which they wish to receive ISC grids. In serverConfig.py, the REQUESTED_ISC_PARMS list is set to None, which means the office receives all grids from other offices (of the same office type) that are a part of the local Fcst database. A REQUESTED_ISC_PARMS list in localConfig.py trims any weather elements for which your office does not wish to receive ISC grids. When you configure REQUESTED_ISC_PARMS locally, you MUST use plus equals (+=) and NOT equals (=) and be sure to include all weather elements for which collaboration is needed.

Requested ISC Parms Example

Offices can also request ISC grids from different office types. This is done using the extraISCparms, REQUESTED_ISC_PARMS, and REQUESTED_ISC_SITES lists. In the extraISCparms list (shown below), use the name of the weather element, not the name of the grid. For example, you would use "Temp" instead of "T". Add the office type from which you are requesting the grids to the end of the extraISCparms tuple in the list. The extraISCparms list MUST be added using plus equals (+=) and NOT equals (=). The extraISCparms tuple in the extraISCparms list needs to have wpc instead of nc for all WPC ISC grids that your office wants to request. In the REQUESTED_ISC_PARMS list append the office type to the end of the weather element (e.g., Trfc for T from a RFC). In the REQUESTED_ISC_PARMS list, all WPC ISC grids your office is requesting, like MaxT, Wind, etc., need to reference wpc instead of nc. In the REQUESTED_ISC_SITES list add the site ids for the offices from which you want grids.

Extra ISC Parms Example

Offices can determine whether to send ISC grids to surrounding offices when saving or publishing grids. By default, the SEND_ISC_ON_SAVE and SEND_ISC_ON_PUBLISH parameters are both set to 0 in serverConfig.py, which means ISC grids are not sent when grids are saved or published. To send ISC grids upon saving the grid, set serverConfig.SEND_ISC_ON_SAVE (shown below) equal to one in localConfig.py if it isn't set to one in masterConfig.py. This recommended setting permits immediate sharing after saving grids, allowing surrounding offices to see your forecast thinking and more easily collaborate. It also sends fewer grids at one time, which is better for system performance. To send ISC grids upon publishing the grid, set serverConfig.SEND_ISC_ON_PUBLISH (shown below) equal to one in localConfig.py. Unfortunately, this setting postpones sending ISC grids until they are published (usually late in the forecast process), making collaboration with surrounding offices more difficult. It also floods the system with many grids at once, negatively impacting system performance.

Send ISC On Save Example