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Satellite signatures of the SpaceX Starship test launch

1-minute Mesoscale Domain Sector GOES-16 (GOES-East) images from all 16 of the ABI spectral bands (above) displayed signatures of a SpaceX Starship rocket launched from the Starbase facility in Boca Chica Beach, Texas at 1333 UTC on 20 April 2023. The rocket booster condensation cloud was evident in images from all 16... Read More

GOES-16 images of ABI spectral bands 01-16, plus a Rocket Plume RGB [click to play animated GIF | MP4]

1-minute Mesoscale Domain Sector GOES-16 (GOES-East) images from all 16 of the ABI spectral bands (above) displayed signatures of a SpaceX Starship rocket launched from the Starbase facility in Boca Chica Beach, Texas at 1333 UTC on 20 April 2023. The rocket booster condensation cloud was evident in images from all 16 spectral bands, drifting slowly eastward away from the launch site — and the ascending rocket booster’s thermal signature was seen in Near-Infrared and Infrared spectral bands 04-16, as well as Plume RGB images.

There was some overlap of the 2 GOES-16 Mesoscale Domain Sectors, which provided images at 30-second intervals (below) that better captured a signature of the rocket explosion at 1337 UTC (triggered by activation of the flight termination system at an altitude near 39 km, due to rocket booster anomalies) — which occurred along the extreme southern edge of Mesoscale Sector 1 coverage.

30-second GOES-16 images of ABI Near-Infrared and Infrared spectral bands 04-16, plus a Rocket Plume RGB [click to play animated GIF | MP4]

The rocket explosion at 1337 UTC was bright enough to be interpreted as lightning by the GLM instrument (below).

GOES-16 Rocket Plume RGB images, with and without an overlay of GLM Flash Extent Density [click to play animated GIF | MP4]

1-minute GOES-16 True Color RGB images from the CSPP GeoSphere site (below) revealed a shadow that was cast by the rocket condensation cloud onto the top of inland stratus clouds across South Texas.

GOES-16 True Color RGB images [click to play MP4 animation]

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Solar eclipse shadow from the South Indian Ocean to the Western Pacific Ocean

JMA Himawari-9 Near-Infrared “Vegetation” (0.86 µm) images (above) showed the southwest-to-northeast transect of a hybrid solar eclipse shadow as it moved across the South Indian Ocean and passed over parts of Australia, Indonesia and the West Pacific Ocean on 20 April 2023. A portion of the shadow also moved over Tropical Storm... Read More

JMA Himawari-9 Near-Infrared “Vegetation” (0.86 µm) images [click to play animated GIF | MP4]

JMA Himawari-9 Near-Infrared “Vegetation” (0.86 µm) images (above) showed the southwest-to-northeast transect of a hybrid solar eclipse shadow as it moved across the South Indian Ocean and passed over parts of Australia, Indonesia and the West Pacific Ocean on 20 April 2023. A portion of the shadow also moved over Tropical Storm Sanvu in the North Pacific.

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Stagnation around American Samoa

MIMIC Total Precipitable Water (TPW) fields, above, from 0000 UTC on 14 April through 1200 UTC on 17 April show a stagnation in flow in/around the Samoan Islands, starting around 0600 UTC on 16 April. This occurs as a storm develops northwest of New Zealand and a strong push of dryer air moves Equatorward to... Read More

MIMIC Total Precipitable Water fields, hourly from 0000 UTC on 14 April through 1200 UTC on 17 April 2023 (Click to enlarge)

MIMIC Total Precipitable Water (TPW) fields, above, from 0000 UTC on 14 April through 1200 UTC on 17 April show a stagnation in flow in/around the Samoan Islands, starting around 0600 UTC on 16 April. This occurs as a storm develops northwest of New Zealand and a strong push of dryer air moves Equatorward to the east of New Zealand. Total Precipitable water estimates for the Pago Pago radiosonde during this time range from 53 to 63 mm (that is, 2 to 2.5″; 2.5″ is near the usual maximum value in Pago Pago in April as shown here) (animation, created at the Wyoming Sounding site).

Data from NOAA-20 NUCAPS (from this website) also suggest an interruption in the flow over the south Pacific. Tropopause heights around New Zealand (below left at circa 1200 UTC on 16 and 17 April) show higher tropopause heights moving from west to east over New Zealand. However, the region of lower tropopause heights between 150 and 165 o W longitude is mostly stationary.

Derived Tropopause Height from NOAA-20 NUCAPS on 17 April (top) and 16 April (bottom), times as indicated (Click to enlarge)

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Severe thunderstorms across the Mid-South and Midwest

A strong cold front (surface analyses) was moving eastward from the southern Plains toward the lower Mississippi Valley on 15 April 2023 — GOES-16 (GOES-East) Total Precipitable Water and Lifted Index / Convective Available Potential Energy Derived Stability Indices (above) revealed a broad corridor of moisture and instability ahead of the cold front.1-minute Mesoscale Domain Sector GOES-16 “Red” Visible... Read More

GOES-16 Total Precipitable Water, Lifted Index and Convective Available Potential Energy derived products [click to play animated GIF | MP4]

A strong cold front (surface analyses) was moving eastward from the southern Plains toward the lower Mississippi Valley on 15 April 2023 — GOES-16 (GOES-East) Total Precipitable Water and Lifted Index / Convective Available Potential Energy Derived Stability Indices (above) revealed a broad corridor of moisture and instability ahead of the cold front.

GOES-16 “Red” Visible (0.64 µm) images, with time-matched SPC Storm Reports plotted in red [click to play animated GIF | MP4]

1-minute Mesoscale Domain Sector GOES-16 “Red” Visible (0.64 µm) images centered over southwestern Missouri (above) included time-matched (+/- 3 minutes) plots of SPC Storm Reports — which showed thunderstorms that produced hail as large as 4.00 inches in diameter and wind gusts as high as 97 mph in Missouri.

The corresponding 1-minute GOES-16 “Clean” Infrared Window (10.3 µm) images with plots of time-matched SPC Storm Reports (below) indicated that some of the thunderstorm overshooting tops exhibited infrared brightness temperatures in the -65 to -70ºC range (darker red to black enhancement).

GOES-16 “Clean” Infrared Window (10.3 µm) images, with time-matched SPC Storm Reports plotted in blue [click to play animated GIF | MP4]

As the thunderstorms moved farther northeast, one tornado produced EF1/EF2 damage in Missouri — with another cluster of weak tornadoes in general vicinity of St Louis. 1-minute GOES-16 Visible and Infrared images centered over St Louis are shown below.

GOES-16 “Red” Visible (0.64 µm) images, with time-matched SPC Storm Reports plotted in red [click to play animated GIF | MP4]


GOES-16 “Clean” Infrared Window (10.3 µm) images, with time-matched SPC Storm Reports plotted in blue [click to play animated GIF | MP4]

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