1-minute Mesoscale Domain Sector GOES-18 (GOES-West) Water Vapor (6.9 µm) images (above) showed a mid-tropospheric shortwave trough that was moving inland across central/northern California — along with surface warm and cold frontal features on 14th December 2024. Of particular interest was the Tornado Warning (red polygon) that was issued for San Francisco (possibly the first Tornado... Read More