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GOES-14 SRSO-R: Tropical Disturbance near the Caribbean

By Scott Lindstrom •

GOES-14 Visible (0.63 µm) images [click to play animated gif]

GOES-14 Visible (0.63 µm) images [click to play animated gif]

GOES-14 SRSO-R Imagery is being produced over the Greater Antilles on 25 August 2016 to monitor a tropical wave (Invest 99L) that is moving towards Florida and the southeast United States. The visible animation above shows a highly sheared system: a low-level circulation center (LLCC) is evident north of Hispaniola and east of the Turks and Caicos, but strong convection (overshooting tops are readily apparent) is displaced well to the east of the system. There is also considerable convection over Hispaniola.

A 2-panel comparison of GOES-14 Visible and Infrared Window images, below (also available as a large 200 Mbyte animated GIF), provided a slightly closer view of the LLCC feature.

GOES-14 0.63 µm Visible (top) and 10.7 µm Infrared Window (bottom) images [click to play MP4 animation]

GOES-14 0.63 µm Visible (top) and 10.7 µm Infrared Window (bottom) images [click to play MP4 animation]

Wind shear analyses from the CIMSS Tropical Weather site, below, show the surface circulation is within a small ribbon of relatively strong shear. Development chances will increase if the wind shear relaxes. A GOES-13 Visible image with overlays of satellite winds and wind shear is available here.

Wind Shear Analysis, 1200 UTC on 25 August 2016 [click to play animated gif]

Wind Shear Analysis, 1200 UTC on 25 August 2016 [click to enlarge]

Metop-A overflew the system at about 0200 UTC on 25 August (link to orbit path), and winds near Tropical Storm Force cover a wide swath of the southwestern Atlantic. Even if this system does not develop into a Tropical Depression, gusty winds and abundant moisture (see the animation of MIRS Total Precipitable Water from this site, below) herald a weekend when it’s appropriate to pay attention to the weather because of the potential for rain and winds.

Morphed Observations of Total Precipitable Water from MIRS, 0000 UTC 24 August - 1500 UTC 25 August [click to play animated gif]

Morphed Observations of Total Precipitable Water from MIRS, 0000 UTC 24 August – 1500 UTC 25 August [click to play animated gif]

===== 28 August Update =====

GOES-14 0.63 µm Visible (top) and 10.7 µm Infrared Window (bottom) images [click to play MP4 animation]

GOES-14 0.63 µm Visible (top) and 10.7 µm Infrared Window (bottom) images [click to play MP4 animation]

Invest 99L developed into Tropical Depression 09 around 21 UTC on 28 August. A comparison of 1-minute GOES-14 Visible (0.63 µm) and Infrared Window (10.7 µm) images, above (also available as a large 94 Mbyte animated GIF), showed the tropical depression as it moved westward through the Florida Straits.

Categories: AVHRR, GOES-14, Metop, Other Satellites, POES, Satellite winds, Tropical cyclones