CIPS Extended Analog Guidance
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GEFS Threats Guidance
Days: 6-8 · 9-11 · 12-14
Updates with each run
Days 6 - 8
GEFS F168 - 20260826/0000    (valid: 0902/0000)
Updated: 8:26 GMT 26 August 2026
Days 9 - 11
GEFS F240 - 20260826/0000    (valid: 0905/0000)
Updated: 11:18 GMT 26 August 2026
Days 12 - 14
GEFS F312 - 20260826/0000    (valid: 0908/0000)
Updated: 10:54 GMT 26 August 2026
Extended Analog Guidance uses the top 5 analogs from each GEFS member (30 members and control) that results in guidance based on 155 most similar analogs.
Currently, the GEFS forecasts for three 3-day periods centered on days 7, 10, and 13 are being used.
If an analog is one of the most similar to more than one GEFS member, that analog will be used (i.e., weighted) that many times.
The extended analogs are now a blend of the EAST and WEST domains. The combined results are presented as single images.
Please send suggestions and comments about the CIPS Extended Analog Guidance to slu[dot]cips[at]gma il[dot]com.
These sources provided the data used in the CIPS Historical Analog Guidance system

Last updated: 10:54 GMT 26 August 2026 · Cooperative Institute for Precipitation Systems · Saint Louis University · slu[dot]cips[at]gmail[dot]com