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The convective and fire weather outlook shapefiles and KML files are created based on the NDFD grids using GDAL utilities. Additional reformatting steps were taken post GDAL transformation to provide KML color-filled polygons, legends and KML tags to improve readability.

NEW: Visit NWS GIS Portal for SPC Convective Outlooks: https://idpgis.ncep.noaa.gov/arcgis/rest/services/NWS_Forecasts_Guidance_Warnings/SPC_wx_outlks/MapServer/.

SPC Shapefile/KML Links
Active Watches www.spc.noaa.gov/products/watch/ActiveWW.kmz displays active watch parallellograms. Please note the official watch is defined by the counties in WOU.
Check out www.spc.noaa.gov/misc/gmww.php to plot active watches on Google Maps. For plotting a specific watch, use www.spc.noaa.gov/misc/gmww.php?wwnum=XXXX where XXXX is the watch number.
Active Mesoscale Discussions www.spc.noaa.gov/products/md/ActiveMD.kmz Check out www.spc.noaa.gov/misc/gmmd.php to plot active MDs on Google Maps. For plotting a specific MD, use www.spc.noaa.gov/misc/gmmd.php?mdnum=XXXX where XXXX is the MD number.
Convective Outlooks (Day 1, 2, 3 and 4-8) Bundle in KML www.spc.noaa.gov/products/outlook/SPC_outlooks.kml
Convective Outlooks (Day 1, 2, 3 and 4-8) Bundle in KMZ www.spc.noaa.gov/products/outlook/SPC_outlooks.kmz
Individual Convective Outlook (Day 1, 2, 3, 4-8) Day 1 Cat/Tornado/Wind/Hail KML: www.spc.noaa.gov/products/outlook/day1otlk_[cat,torn,wind,hail].km[l,z]
Day 2, 3 Cat/Prob KML: www.spc.noaa.gov/products/outlook/day[2,3]otlk_[cat,prob].km[l,z]
Day 1, 2, 3 Convective Outlook Shapefiles: www.spc.noaa.gov/products/outlook/day[1,2,3]otlk-shp.zip
Day 4-8 Outlook Shapefiles: www.spc.noaa.gov/products/exper/day4-8/day[4,5,6,7,8]prob-shp.zip

Please note that the categorical outlook shapefiles contain DN attributes which are based on the NDFD grid values which are defined as:
  • 2 - Thunderstorm
  • 3 - Marginal Risk
  • 4 - Slight Risk
  • 5 - Enhanced Risk
  • 6 - Moderate Risk
  • 8 - High Risk

  • For probabilistic outlook shapefiles the DN value denotes the probability (i.e., DN = 2 denotes 2%).
    Fire Weather Outlooks (Day 1, 2 and 3-8) Bundle www.spc.noaa.gov/products/fire_wx/SPC_firewx.kmz
    Individual Fire Weather Outlook (Day 1, 2, 3-8) Day 1, 2 KML: www.spc.noaa.gov/products/fire_wx/day[1,2,38]fireotlk.kmz
    Day 3-8 KML: www.spc.noaa.gov/products/exper/fire_wx/day[3,4,5,6,7,8]firewx.kmz
    Day 1, 2 Shapefiles: www.spc.noaa.gov/products/fire_wx/day[1,2]firewx-shp.zip
    Day 3-8 Shapefiles: www.spc.noaa.gov/products/exper/fire_wx/day[3,4,5,6,7,8]firewx-shp.zip
    Storm Reports www.spc.noaa.gov/climo/reports/SPC_Storm_Reports.kmz
    Weather Topics:
    Watches, Mesoscale Discussions, Outlooks, Fire Weather, All Products, Contact Us

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    National Centers for Environmental Prediction
    Storm Prediction Center
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    Norman, OK 73072 U.S.A.
    spc.feedback@noaa.gov
    Page last modified: August 07, 2018
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