Hurricane Matthew

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Hurricane Matthew as it moved northwards in the Caribbean, striking Haiti in the early hours of the morning of 4 October

TC Matthew
Date & Time
04 October 2016 02:01 UTC
Visible, Infrared Channel, ASCAT Winds

By Mark Higgins

EUMETSAT's Metop-B image shows Matthew as a category-5 hurricane, just before the centre of the storm made landfall over Haiti. The enhanced colour image, Figure 1 (top right) shows the extent of the coldest cloud tops (red) which indicate the most active areas of the storm.

The winds from the ASCAT scatterometer (Figure 2), onboard Metop-B, also clearly show the storm's centre — the region of hurricane force winds (the bright red wind markers around the distinct eye).

As British weatherman Tomasz Schafernaker pointed out on Twitter, the region of hurricane force winds is very small, compared to the size of the actual hurricane – very much confined near to the storm centre, surrounded by a much larger area of storm force winds.

Figure 2: Metop-B AVHRR with/without ASCAT winds, 4 October 2016 02:01 UTC
Infrared with ASCAT Winds Infrared only

Figure 3 shows the hurricane after it had passed over Haiti. This is the visible channel from Metop-B, with the ASCAT winds overlaid. Three days later, on 7 October, the hurricane passed between Florida and the Bahamas as can be seen in figure 4 with the Metop-A IR10.8 channel, in false colours.

Figure 3
Figure 3: Metop-B Visible Channel with the ASCAT Winds, 4 October 2016, 14:48 UTC  Full resolution
Figure 4
Figure 4: Metop-A IR10.8 channel, 7 October 2016, 02:22 UTC  Full resolution

Full resolution Metop-B AVHRR Infrared, 4 October 02:01 UTC
Full resolution Metop-B AVHRR, 4 October 02:01 UTC
Full resolution Metop-B AVHRR overlaid with ASCAT Winds, 4 October 02:01 UTC



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