Strong storm off the Pacific Northwest coast
* GOES-16 data posted on this page are preliminary, non-operational and are undergoing testing *Nighttime images of Suomi NPP VIIRS Day/Night Band (0.7 µm) and Infrared Window (11.45 µm) data (above) showed an occluded extratropical cyclone off the coast of the Pacific Northwest at 1050 UTC or 3:50 AM local time on 13 November 2017. This system was producing storm force winds offshore.
A GOES-16 Mesoscale Sector had been positioned over that region, providing imagery at 1-minute intervals — the structure and evolution of the storm could be seen using Lower-level (7.3 µm), Mid-level (6.9 µm) and Upper-level (6.2 µm) Water Vapor imagery (below).A more detailed view was provided by GOES-16 “Red” Visible (0.64 µm) images (below), with hourly wind gusts plotted in yellow. Peak wind gusts as high as 89 mph were reported within the Seattle and Portland County Warning Areas. A comparison of Suomi NPP VIIRS Visible (0.64 µm) and Infrared Window (11.45 µm) images at 2038 UTC or 1:38 PM local time (below) showed a curved cloud band with embedded convective elements moving inland over western Washington and Vancouver Island. Note that the VIIRS instrument will also fly on the JPSS series of satellites.