Topic: Critical Weather Day Updated - Critical Weather Day has been extended to 1200Z Tuesday Jan 20, 2026

Date/Time Issued: January 19, 2026 1337Z

Product(s) or Data Impacted: NWS IT Enterprise

Date/Time Initial Impact: January 19, 2026 1000Z J/DAY 019

Date/Time Expected End: January 20, 2026 1200Z J/DAY 020

Length of Event: 1 day 2 hours

Who: NCEP, NCF

Details/Specifics: Space Weather ops, with an S3 (strong) Solar Radiation Storm observed and a G4 (Severe) or greater Geomagnetic Storm predicted.

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