La Palma volcano in the Canary Islands

November 2nd, 2021 |

GOES-16 True Color RGB images [click to play animated GIF | MP4]

GOES-16 (GOES-East) True Color RGB images created using Geo2Grid (above) showed the east-southeastward drift of ash-laden volcanic clouds from Cumbre Vieja on La Palma in the Canary Islands on 02 November 2021. Since this current eruptive period began on 19 September, intermittent periods of volcanic clouds with an elevated ash content have been observed — and on this particular day, the darker tan to light brown appearance was an indication that higher ash concentrations were likely.

The corresponding GOES-16 Ash RGB images (below) extended an hour further, past sunset. The hues of pink to purple suggested the presence of higher concentrations of volcanic ash.

GOES-16 Ash RGB images [click to play animated GIF | MP4]

Ash Loading product [click to play animated GIF | MP4]

Compared to previous eruptions on 19 September and 09 October, the Ash RGB signature was more pronounced on this day; this was due to a significantly higher ash loading (above) of larger-radius ash particles (below). These 2 radiometrically-retrieved products are from the NOAA/CIMSS Volcanic Cloud Monitoring site.

Ash Effective Radius product [click to play animated GIF | MP4]

Tropical Storm Wanda

November 2nd, 2021 |
GOES-16 Band 2 Visible (0.64 µm) Imagery, 1250 -1740 UTC on 2 November 2021

CSPP GeoSphere imagery, above, (click here for a direct link to the animation above in CSPP Geosphere; it will remain there for about 2 weeks before the data are overwritten) shows the evolution of Tropical Storm Wanda on 2 November 2021. (Wanda had transitioned to a Subtropical Storm on 31 October). Convection developed near the storm center and wrapped about halfway around the center. Dry air is also affecting this storm. A 24-hour animation of MIMIC Total Precipitable Water (from this site), below, shows an absence of deep moisture, with the driest air to the west and south.

MIMIC Total Precipitable Water, 18z 01 Nov – 17z 02 Nov 2021 (Click to enlarge)

GOES Imagery also shows dry air near Wanda. Both the low-level water vapor (Band 10, 7.34 µm) and the level 2 Total Precipitable Water product (a clear-sky only product) show dry air signatures: for the water vapor imagery, orange and yellow enhancements; for the total precipitable water, yellow and green enhancements signifying values around 1.3″. The airmass RGB shows Wanda far removes from the tropical airmass that is characterized by a deep green color.

GOES-16 Band 10 infrared (7.34 µm) imagery, GOES-16 Total Precipitable Water, and GOES-16 Airmass RGB, all at 1800 UTC on 2 Nov 2021 (Click to enlarge)