The Storm Prediction Center (SPC) Weather Outlooks Web Service offers various polygon layers representing Convection Outlooks from Day 1 to Day 3. These encompass Category Outlooks for Significant and Probabilistic Tornado, Hail, and Wind Outlooks. Additionally, the service provides layers displaying forecasted polygons for Day 4 to Day 8 Probabilistic Outlooks. Further details regarding the layers included in this map service are outlined below.

Day 1 Layer contain: Separate 5-tier categorical, probabilistic tornado, hail and wind, significant tornado, hail and wind outlooks.

Day 2 Layer contain: Separate 5-tier categorical, probabilistic tornado, hail and wind, significant tornado, hail and wind outlooks.

Day 3 Layer contain: 5-tier categorical outlook, probabilistic severe, and significant severe.

Days 4-8 Layers are all probabilistic outlooks.

Update Frequency:

Day 1 updates daily at 01Z, 06Z, 13Z, 16:30Z, and 20Z

Day 2 updates daily at 06Z and 17Z

Day 3 updates daily at 07:30Z

Day 4-8 updates daily at 09Z

Link to graphical web page: https://www.spc.noaa.gov

Link to data download (shapefile): https://www.spc.noaa.gov/gis

Day 1: https://www.spc.noaa.gov/products/outlook/day1otlk-shp.zip

Groups