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Heavy rainfall and flash flooding across North Texas

1-minute Mesoscale Domain Sector GOES-16 (GOES-East) Visible/Infrared Sandwich RGB images from 1300-1800 UTC (above) included plots of 1-hour surface precipitation amounts — and showed clusters of thunderstorms moving across North Texas and the greater Dallas/Fort Worth area early in the day on 22 August 2022. These storms were focused along a quasi-stationary surface front... Read More

GOES-16 Visible/Infrared Sandwich RGB images, with hourly surface precipitation amounts plotted in white [click to play animated GIF | MP4]

1-minute Mesoscale Domain Sector GOES-16 (GOES-East) Visible/Infrared Sandwich RGB images from 1300-1800 UTC (above) included plots of 1-hour surface precipitation amounts — and showed clusters of thunderstorms moving across North Texas and the greater Dallas/Fort Worth area early in the day on 22 August 2022. These storms were focused along a quasi-stationary surface front that was draped across the region; heavy rainfall during this 5-hour period caused additional flash flooding in locations that had already received substantial precipitation within the previous 24 hours.

A GOES-16 Visible/Infrared Sandwich RGB image at 1410 UTC (below) displayed cursor readouts of the 3 RGB components along with the available Level 2 Derived Products — cloud-top infrared brightness temperatures were colder than -80ºC, Cloud-Top Heights were greater than 54,000 feet and Rainfall Rates were nearly 3.7 inches per hour just south of Terrell, Texas. The Dallas/Fort Worth airport received a record 3.01 inches of rain in 1 hour (tweet).

GOES-16 Visible/Infrared Sandwich RGB image at 1410 UTC, with cursor readouts of RGB components and Level 2 Derived Products [click to enlarge]

Hourly MIMIC Total Precipitable Water images viewed using RealEarth (below) depicted TPW values in the 60-70 mm (2.4-2.8 inches) range, with a peak value of 78 mm (3.1 inches). The 22 August / 00 UTC rawinsonde report from Fort Worth had a TPW value of 2.34 inches, which was a record maximum value for that date/time.

MIMIC Total Precipitable Water product [click to play animated GIF]

Additional satellite imagery and information about this event can be found on the Satellite Liaison Blog

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Grassland fire in North Dakota

GOES-16 (GOES-East) Fire Tempera ture RGB images (above) showed the rapid north-northwestward spread of a wind-driven grassland fire across Sioux County in far southern North Dakota during the early afternoon hours on 21 August 2022. South-southeasterly winds were gusting to 17-18 knots (19-21 mph) at surrounding METAR sites during that time period.The GOES-16 Fire Temperature... Read More

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

GOES-16 (GOES-East) Fire Tempera ture RGB images (above) showed the rapid north-northwestward spread of a wind-driven grassland fire across Sioux County in far southern North Dakota during the early afternoon hours on 21 August 2022. South-southeasterly winds were gusting to 17-18 knots (19-21 mph) at surrounding METAR sites during that time period.

The GOES-16 Fire Temperature RGB image at 1921 UTC (below) includes cursor readouts of the individual RGB components, along with the corresponding Fire Detection and Characterization Algorithm (FDCA) products. This was the time of the peak 3.9 µm infrared brightness temperature of 86.95ºC — the FDCA Fire Temperature value was 758.57 K, while the Fire Power was 912.46 MW.

GOES-16 Fire Temperature RGB image at 1921 UTC, with cursor readouts of RGB components and Fire Detection and Characterization Algorithm products [click to enlarge]

In Suomi-NPP VIIRS True Color and False Color RGB images valid at 1938 UTC viewed using RealEarth (below), the elongated dark vegetation burn scar was evident, along with a smoke plume fanning out to the north and a lone pyrocumulus cloud just northeast of the active fire (brighter shades of pink in the False Color image).

Suomi-NPP VIIRS True Color and False Color RGB images, valid at 1938 UTC [click to enlarge]

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Welcome back Suomi NPP!

The Suomi NPP satellite experienced an anomaly at ~1630 UTC on 26 July that caused all instruments to go into ‘safe mode’. NOAA Engineers have successfully re-started the instruments. The Direct Broadcast signal resumed on 11 August, and NOAA/NESDIS proclaimed VIIRS Sensor Data Record (SDR) data operational as of 18... Read More

Suomi NPP Day Night Band visible (0.7 um) Imagery from two morning overpasses on 19 August 2022 as viewed from the San Juan (PR) Direct Broadcast site

The Suomi NPP satellite experienced an anomaly at ~1630 UTC on 26 July that caused all instruments to go into ‘safe mode’. NOAA Engineers have successfully re-started the instruments. The Direct Broadcast signal resumed on 11 August, and NOAA/NESDIS proclaimed VIIRS Sensor Data Record (SDR) data operational as of 18 August (information on this outage is available here). The above Day Night Band image, from RealEarth, shows Suomi NPP data from the San Juan Direct Broadcast site. The tropical Atlantic remains quiet.

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Blowing dust and wildfire smoke in northern Argentina

GOES-16 (GOES-East) True Color RGB and Nighttime Microphysics RGB images from the CSPP GeoSphere site (above) showed an arc of blowing dust (along with multiple wildfire smoke plumes) moving northward across northern Argentina — behind a cold front — on 15 August 2022.Embedded within the broad arc of blowing dust were dense plumes... Read More

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

GOES-16 (GOES-East) True Color RGB and Nighttime Microphysics RGB images from the CSPP GeoSphere site (above) showed an arc of blowing dust (along with multiple wildfire smoke plumes) moving northward across northern Argentina — behind a cold front — on 15 August 2022.

Embedded within the broad arc of blowing dust were dense plumes originating from salt flats along the northern edge of Mar Chiquita Lagoon — a closer view of those plumes is shown below.

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

GOES-16 “Red” Visible (0.64 µm) images (below) include plots of hourly surface reports — and as the cold front moved northward, surface report data (SACO | SANT | SARC | SARF | SASA | SASJ) revealed southerly wind gusts as high as 34 knots and visibility restrictions as low as 3 miles (due to blowing dust) along/behind the front.

GOES-16 “Red” Visible (0.64 µm) images [click to play animated GIF | MP4]

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