Top 10 SPC Outlooks by Size
The IEM attempts a robust archive of SPC outlooks. These outlooks have changed methodologies and threshold meanings over the years. You are strongly encouraged to set a start year to limit the data to a given period. The listing only inludes one outlook for a given canonical date.
This app can be slow to generate! For common outlook types, the backend database query can take a number of seconds to complete. The computed area is done within the US National Atlas Equal Area (EPSG:9311).
Related: Top 10 MCDs by Size SPC Outlook Shapefile Download
Top 10 Largest Day: 1 Category: CATEGORICAL Threshold: HIGH
Generated at: 2024-09-08T01:02:01Z
in 0.15s
JSON Webservice for the data below:
https://mesonet.agron.iastate.edu/json/spc_bysize.py?day=1&threshold=HIGH&category=CATEGORICAL&syear=1987
Rank | Canonical Outlook Date | Cycle Hour UTC | Size (sq km) | SPC Link/Image |
---|---|---|---|---|
1 | 1993-06-08 | -1 | 906661.94 | |
2 | 1990-06-01 | -1 | 809681.5 | |
3 | 1990-03-14 | 6 | 732120.76 | ![]() |
4 | 1993-06-07 | -1 | 714248.26 | |
5 | 1990-05-15 | 6 | 668685.38 | ![]() |
6 | 1988-11-15 | -1 | 667747.31 | |
7 | 1989-11-15 | -1 | 662447.38 | |
8 | 2004-05-30 | -1 | 624863.3 | |
9 | 1994-04-25 | -1 | 614650.97 | |
10 | 1991-03-22 | -1 | 614068.73 |