Documentation for /cgi-bin/request/gis/watchwarn.py

This service emits shapefiles (with additional csv included), or even Excel files. This service is rather blunt force and perhaps you should review the mountain of adhoc JSON/API services found at IEM Legacy JSON Services https://mesonet.agron.iastate.edu/json/ or at IEM API Services https://mesonet.agron.iastate.edu/api/1/docs/ .

CGI Parameters

  • accept: The format to return, either "shapefile" or "excel". Note that the
    "shapefile" format returns as a ZIP file and also includes a simple CSV file within.
  • addsvs: If "yes", include polygons that were included within any followup
    statements after issuance. The default is to only return the initial polygon.
  • ets: The end timestamp in UTC. The format is ISO8601, e.g.
    2010-06-01T00:00Z.
  • limit0: If "yes", only include Tornado, Severe Thunderstorm, Flash Flood,
    and Marine Warnings.
  • limit1: If "yes", only include Storm Based Warnings.
  • limit2: If "yes", only include Emergency Warnings.
  • limitps: If "yes", only include the specified phenomena and significance.
  • location_group: The location group to use, either "wfo" or "states".
  • phenomena: The two character VTEC phenomena to include, default is "TO"
    when limitps is set.
  • simple: If "yes", use a simplified geometry for the UGC counties/zones.
    This can be useful for reducing the size of the shapefile.
  • significance: The two character VTEC significance to include,
    default is "W" when limitps is set.
  • states[]: List (either multiple params or comma seperated list) of states
    to include data for.
  • sts: The start timestamp in UTC. The format is ISO8601, e.g.
    2010-06-01T00:00Z.
  • timeopt: The time option to use, either 1 or 2, default is 1, which uses
    the start and end timestamps to determine which events to include. Option 2 uses the at timestamp to determine which events to include.
  • wfo[] or wfos[]: List (either multiple params or comma seperated list) of
    WFOs to include data for.
  • {year,month,day,hour,minute}1: The start timestamp components in UTC, if
    you specify a sts parameter, these are ignored.
  • {year,month,day,hour,minute}2: The end timestamp components in UTC, if
    you specify a ets parameter, these are ignored.
  • {year,month,day,hour,minute}3: The at timestamp components in UTC. When
    timeopt is 2, this is used to find all events that were valid at this time.