Intense cyclone in the Gulf of Alaska

September 26th, 2012
Suomi NPP VIIRS 0.7 µm Day/Night Band and 11.45 µm IR channel images

Suomi NPP VIIRS 0.7 µm Day/Night Band and 11.45 µm IR channel images

A cyclone rapidly intensified (deepening 42 mb in 24 hours, and 26 mb in 12 hours) in the Gulf of Alaska on 26 September 2012, and was expected to produce winds up to hurricane force. An AWIPS image comparison of Suomi NPP VIIRS 0.7 µm Day/Night Band and 11.45 µm IR channel images at 11:24 UTC (above) showed great detail to the cloud features as the storm began to exhibit a classic “cusp” signature as rapid intensification was underway (IR image with surface analysis overlay).

McIDAS images of GOES-15 6.5 µm water vapor channel data (below; click image to play animation) portrayed the evolution of the storm from 04:00 UTC to 23:45 UTC.

GOES-15 6.5 µm water vapor channel images (click to play animation)

GOES-15 6.5 µm water vapor channel images (click to play animation)

3 Responses to “Intense cyclone in the Gulf of Alaska”

  1. An absolutely amazing storm here. Great images.

  2. Linda Wallin says:

    Why is it a cyclone? Because it is in the Pacific?

  3. scott.bachmeier says:

    “Cyclone” is a term used to describe a low pressure feature (as opposed to an “anticyclone”, or high pressure feature).

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