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Typhoon Bualoi in the West Pacific Ocean

By Scott Bachmeier •

2.5-minute rapid scan JMA Himawari-8 “Clean” Infrared Window (10.4 µm) images (above) displayed Category 4 Typhoon Bualoi west of the Mariana Islands in the West Pacific Ocean on 22 October 2019. Note the rapid clearing and expansion of the eye after 04 UTC, as the tropical cyclone continued its trend... Read More

JMA Himawari-8

Himawari-8 “Clean” Infrared Window (10.4 µm) images [click to play animation | MP4]

2.5-minute rapid scan JMA Himawari-8 “Clean” Infrared Window (10.4 µm) images (above) displayed Category 4 Typhoon Bualoi west of the Mariana Islands in the West Pacific Ocean on 22 October 2019. Note the rapid clearing and expansion of the eye after 04 UTC, as the tropical cyclone continued its trend of intensification (ADT | SATCON) while moving over water possessing high values of Sea Surface Temperature and Ocean Heat Content.

Himawari-8 “Red” Visible (0.64 µm) and Infrared images during that period when the eye rapidly cleared are shown below; the visible images eventually revealed mesovortices within the eye.

Himawari-8

Himawari-8 “Red” Visible (0.64 µm, left) and “Clean” Infrared Window (10.4 µm, right) images [click to play animation | MP4]

In a toggle between NOAA-20 VIIRS Day/Night Band (0.7 µm) and Infrared Window (11.45 µm) images at 1543 UTC (below), note the bright streak on DNB image from lightning activity in the eastern eyewall, along with moonlight side-illumination of some overshooting tops.

NOAA-20 VIIRS Day/Night Band (0.7 µm) and Infrared Window (11.45 µm) images (credit: William Straka, CIMSS) [click to enlarge]

NOAA-20 VIIRS Day/Night Band (0.7 µm) and Infrared Window (11.45 µm) images (credit: William Straka, CIMSS) [click to enlarge]

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Convectively-generated gravity waves off the coast of Western Australia

By Scott Bachmeier •

JMA Himawari-8 Upper-level Water Vapor (6.2 µm) images (above) revealed 2 distinct pulses of long-lived gravity waves that propagated northward/northwestward/westward from the coast of Western Australia during the 20-22 October 2019 period. These waves appear to have been generated by thunderstorms near and along the coast — and traveled as... Read More

Himawari-8 Upper-level Water Vapor (6.2 µm) images [click to play animation | MP4]

Himawari-8 Upper-level Water Vapor (6.2 µm) images [click to play animation | MP4]

JMA Himawari-8 Upper-level Water Vapor (6.2 µm) images (above) revealed 2 distinct pulses of long-lived gravity waves that propagated northward/northwestward/westward from the coast of Western Australia during the 20-22 October 2019 period. These waves appear to have been generated by thunderstorms near and along the coast — and traveled as far northward as Christmas Island (station identifier YPXM) and the Lesser Sunda Islands.

The corresponding Himawari-8 Mid-level Water Vapor (6.9 µm) images are shown below.

Himawari-8 Mid-level Water Vapor (6.9 µm) images [click to play animation | MP4]

Himawari-8 Mid-level Water Vapor (6.9 µm) images [click to play animation | MP4]

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Severe thunderstorms in the southern US

By Scott Bachmeier •

1-minute Mesoscale Domain Sector GOES-16 (GOES-East) “Clean” Infrared Window (10.35 µm) images (above) showed thunderstorms that produced tornadoes, large hail and damaging winds (SPC storm reports) in the Dallas/Fort Worth, Texas area after sunset on 20 October 2019. One of the tornadoes produced EF-3 damage in North Dallas.In a larger-scale view of GOES-16 Infrared images (below), other thunderstorms were... Read More

GOES-16 “Clean” Infrared Window (10.35 µm) images, with SPC Storm Reports plotted in cyan [click to play animation | MP4]

GOES-16 “Clean” Infrared Window (10.35 µm) images, with SPC Storm Reports plotted in cyan [click to play animation | MP4]

1-minute Mesoscale Domain Sector GOES-16 (GOES-East) “Clean” Infrared Window (10.35 µm) images (above) showed thunderstorms that produced tornadoes, large hail and damaging winds (SPC storm reports) in the Dallas/Fort Worth, Texas area after sunset on 20 October 2019. One of the tornadoes produced EF-3 damage in North Dallas.

In a larger-scale view of GOES-16 Infrared images (below), other thunderstorms were seen that produced a variety of severe weather in other parts of Texas, Louisiana, Oklahoma, Arkansas and Missouri — including winds of 82 mph in Oklahoma and 80 mph in Arkansas. The rapidly-pulsing behavior of overshooting tops was well captured by the 1-minute imagery.

GOES-16 “Clean” Infrared Window (10.35 µm) images, with SPC Storm Reports plotted in white [click to play animation | MP4]

GOES-16 “Clean” Infrared Window (10.35 µm) images, with SPC Storm Reports plotted in white [click to play animation | MP4]

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Severe thunderstorms in Idaho

By Scott Bachmeier •

1-minute Mesoscale Domain Sector GOES-17 (GOES-West)  “Red” Visible (0.64 µm) and “Clean” Infrared Window (10.35 µm) images (above) showed thunderstorms that developed along a fast-moving cold front, producing a swath of damaging winds (SPC storm reports) across southern Idaho on 19 October 2019.5-minute GOES-17 Mid-level Water Vapor (6.9 µm) images (below) displayed signatures of a jet stream and shortwave trough... Read More

GOES-17 “Red” Visible (0.64 µm, left) and "Clean" Infrared Window (10.35 µm, right) images, with SPC Storm Reports plotted in red [click to play animation | MP4]

GOES-17 “Red” Visible (0.64 µm, left) and “Clean” Infrared Window (10.35 µm, right) images, with SPC Storm Reports plotted in red [click to play animation | MP4]

1-minute Mesoscale Domain Sector GOES-17 (GOES-West)  “Red” Visible (0.64 µm) and “Clean” Infrared Window (10.35 µm) images (above) showed thunderstorms that developed along a fast-moving cold front, producing a swath of damaging winds (SPC storm reports) across southern Idaho on 19 October 2019.

5-minute GOES-17 Mid-level Water Vapor (6.9 µm) images (below) displayed signatures of a jet stream and shortwave trough that were moving across the region that day.

[click to play animation | MP4]

GOES-17 Mid-level Water Vapor (6.9 µm) images, with SPC Storm Reports plotted in red [click to play animation | MP4]

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