Update #1: Critical Weather Day has been extended to 0000Z Wed Jan 21 2026

Topic: Critical Weather Day Update

Date/Time Issued: January 20, 2026 0913Z

Product(s) or Data Impacted: NWS IT Enterprise

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

Date/Time Expected End: January 21, 2026 0000Z J/DAY 021

Length of Event: 1 day 14 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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