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Hourly GOES Animations from August 2015

By Scott Lindstrom •

The YouTube video embedded above shows GOES-13 Water Vapor (6.5 µm) images each hour for all of August 2015. The 10.7 µm Infrared window channel animation is shown below. Both show a remarkable lack of thunderstorm activity in the Caribbean Sea. In addition, hourly Water Vapor (6.5 µm) and... Read More


The YouTube video embedded above shows GOES-13 Water Vapor (6.5 µm) images each hour for all of August 2015. The 10.7 µm Infrared window channel animation is shown below. Both show a remarkable lack of thunderstorm activity in the Caribbean Sea.


In addition, hourly Water Vapor (6.5 µm) and Infrared window channel (10.7 µm) imagery from GOES-15 is shown below.



The GOES-15 imagery includes the northern fringe of the Intertropical Convergence Zone, and the active Eastern Pacific hurricane season is apparent, including several storms that have threatened the state of Hawai’i. The atypically strong August storm that hit the Pacific Northwest is also seen at the end of the animations.

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Hurricane Fred

By Scott Bachmeier •

Tropical Storm Fred reached hurricane intensity east of the Cape Verde Islands late in the day on 30 August 2015.  As mentioned in the NHC discussion on the following morning, Fred was the first hurricane to pass through the Cape Verde Islands since 1892. While no central eye was apparent on... Read More

GOES-13 Visible (0.63 um) and Infrared (10.7 um) images [click to enlarge]

GOES-13 Visible (0.63 um) and Infrared (10.7 um) images [click to enlarge]

Tropical Storm Fred reached hurricane intensity east of the Cape Verde Islands late in the day on 30 August 2015.  As mentioned in the NHC discussion on the following morning, Fred was the first hurricane to pass through the Cape Verde Islands since 1892. While no central eye was apparent on GOES-13 (GOES-East) Visible (0.63 um) and Infrared (10.7 um) images at 0845 UTC (above), a DMSP SSMIS 85 GHz microwave image sourced from the CIMSS Tropical Cyclones site did reveal a small eye at 0904 UTC (below).

DMSP SSMIS 85 GHz microwave image [click to enlarge]

DMSP SSMIS 85 GHz microwave image [click to enlarge]

Later in the day, a few Tropical Overshooting Tops were analyzed using Meteosat-10 Infrared (10.8 um) imagery (below).

Meteosat-10 Infrared (10.8 um) images with overlay of Tropical Overshooting Top product [click to enlarge]

Meteosat-10 Infrared (10.8 um) images with overlay of Tropical Overshooting Top product [click to enlarge]

More information about Hurricane Fred can be found here.

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Category 4 Hurricanes Kilo, Ignacio, and Jimena in the Pacific Ocean

By Scott Bachmeier •

A composite of Suomi NPP VIIRS true-color Red/Green/Blue (RGB) images from the SSEC RealEarth site (above; click to enlarge) showed Hurricanes Kilo, Ignacio, and Jimena in the central and eastern North Pacific Ocean on 29 August 2015. All three of these Category 4 North Pacific hurricanes were located east of the International... Read More

Suomi NPP VIIRS true-color image composite [click to enlarge]

Suomi NPP VIIRS true-color image composite [click to enlarge]

A composite of Suomi NPP VIIRS true-color Red/Green/Blue (RGB) images from the SSEC RealEarth site (above; click to enlarge) showed Hurricanes Kilo, Ignacio, and Jimena in the central and eastern North Pacific Ocean on 29 August 2015. All three of these Category 4 North Pacific hurricanes were located east of the International Dateline, which is the first such occurrence since reliable records began in the satellite era.

An animation of GOES-15 (GOES-West) Infrared (10.7 µm) images (below; click image to play animation) showed the evolution of these 3 tropical cyclones during the 29-30 August period.

GOES-15 Infrared (10.7 µm) images [click to play animation]

GOES-15 Infrared (10.7 µm) images [click to play animation]

The MIMIC Total Precipitable Water product (below; click image to play animation) indicated that all 3 storms were easily able to tap abundant moisture from the Intertropical Convergence Zone (ITCZ).

MIMIC TPW product [click to play animation]

MIMIC TPW product [click to play animation]

A longer animation of the MIMIC TPW product covering the period 21 August to 01 September is shown below.

MIMIC Total Precipitable Water product [click to play animation]

MIMIC Total Precipitable Water product [click to play animation]

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Heavy rain event in southeastern South Dakota

By Scott Bachmeier •

A line of training thunderstorms produced heavy rainfall in parts of southeastern South Dakota on the evening of 27 August 2015, with the highest rainfall amount being 7.52 inches just southwest of Sioux Falls (Public Information Statement). 4-km resolution GOES-13 (GOES-East) 10.7 µm Infrared images (above; click to play animation) showed the... Read More

GOES-13 Infrared (10.7 um) images [click to play animation]

GOES-13 Infrared (10.7 um) images [click to play animation]

A line of training thunderstorms produced heavy rainfall in parts of southeastern South Dakota on the evening of 27 August 2015, with the highest rainfall amount being 7.52 inches just southwest of Sioux Falls (Public Information Statement). 4-km resolution GOES-13 (GOES-East) 10.7 µm Infrared images (above; click to play animation) showed the development and motion of the storms that moved through the Sioux Falls (KFSD) area. The coldest cloud-top IR brightness temperature was -68º C (darker black color enhancement) just to the northwest of Sioux Falls on the 0115 UTC (8:15 PM local time) image. However, because of parallax resulting from the large satellite viewing angle, the actual location of that tall, cold cloud top would have been just to the southeast of Sioux Falls (the yellow + symbol on this image).

A comparison of 1-km resolution POES AVHRR Visible (0.86 µm) and Infrared (12.0 µm) images at 2330 UTC or 6:30 PM local time (below) showed the developing convective storms in greater detail. The coldest cloud-top IR brightness temperature was -73º C with the westernmost cluster of thunderstorms.

POES AVHRR Visible (0.86 m) and Infrared (12.0 um) images [click to enlarge]

POES AVHRR Visible (0.86 m) and Infrared (12.0 um) images [click to enlarge]

A closer view of the GOES-13 Infrared images with METAR surface reports is shown below. Note that Sioux Falls had a peak wind gust of 32 knots (37 mph).

GOES-13 Infrared (10.7 um) images with METAR surface reports [click to play animation]

GOES-13 Infrared (10.7 um) images with METAR surface reports [click to play animation]

The Blended Total Precipitable Water (TPW) Percent of Normal product (below; click to play animation) showed TPW values as high as 199% of normal just to the north-northeast of Sioux Falls at 0442 UTC (11:42 PM local time).

Blended Total Precipitable Water Percent of Normal [click to play animation]

Blended Total Precipitable Water Percent of Normal [click to play animation]


 

 

 

 

 

 


 

 

 

 

 

 

 

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