Haboob over Nebraska on 05-12-22 seen by GOES-16

May 12th, 2022 |

GOES-16 provided a view of a haboob over Nebraska on 05-12-2022. A haboob is an intense dust storm or “wall of dust” that occurs in dry conditions in high winds, which were recorded in Nebraska up to 80 mph. Haboobs can bring low visibility and even no-visibility blackouts that cause road closures. These dust storms are typically rare in the midwest. However, moderate drought conditions have made dust available in the Plains region. Similar dust storms were reported in areas of South Dakota and Iowa as the same system moved eastward.

A haboob, an intense dust storm indicated by a red arrow, is shown by a GOES-16 true color animation on 05-12-2022 from 20:00 to 22:00UTC over southern Nebraska. This visualization is available in RealEarth.

GOES-16 GLM Lightning detection over Minnesota

May 12th, 2022 |

Wednesday, 05-11-2022, brought storm damage and copious amounts of lightning over Minnesota and parts of South Dakota, Iowa, and Wisconsin. The GOES-16 Geostationary Lightning Mapper (GLM) detected the flash extent density over these areas. A NEXRAD radar composite shows a large bow echo signature around 05-12-2022 01:25Z that spanned the entire lower half of Minnesota. Storms are still currently pushing through eastern Minnesota and northern Wisconsin and forecast to bring severe thunderstorms throughout the afternoon. There are also continuing threats of flooding in the Twin Cities and surrounding areas.

GOES-16 GLM Flash Extent Density and Band 13 reflectance on 05-12-2022 from 00:03 UTC to 16:43 UTC.
GOES-16 Band 13 reflectance with NEXRAD Reflectivity on 05-12-2022 from 00:05 UTC to 16:45 UTC.

The GOES-16 GLM Flash Extent Density product is available on RealEarth here. Near-real-time GLM visualizations are available as well as archived visualizations of GLM going back 3-4 days.

GOES-16 and GOES-17 Full-Disk IFR/Low IFR Probability fields are now available in RealEarth

May 3rd, 2022 |
RealEarth front page, Search box highlighted, then filled with ‘IFR Probability’, and GOES-West IFR Probability at 1250 UTC on 3 May 2022 (Click to enlarge)

RealEarth recently added Full Disk versions of IFR Probability and Low IFR Probability products for both GOES East (GOES-16) and GOES West (GOES-17). The animation above shows the simple way to display them: go to the RealEarth site (link), and enter ‘IFR Probability’ into the Search Tool, then drag the GOES-16 or GOES-17 thumbnail onto the globe. GOES-16 and GOES-17 Full Disk imagery typically has a 10-minute cadence. Did you notice in the GOES-17 Full Disk image the signal over the big island of Hawai’i? That’s also shown below, toggling with the GOES-17 ‘Clean Window’ Infrared (10.3 µm) Band 13 image. IFR Probability is highest along the slopes of Hawai’i’s volcanoes; IFR Probability computation does have knowledge of terrain height.

GOES-17 IFR Probability and GOES-17 Band 13 (10.3 µm) imagery, 1250 UTC on 3 May 2022 (Click to enlarge)

Residual winter ice in Lake Superior and Chequamegon Bay

April 27th, 2022 |

Landsat-8 False Color image [click to enlarge]

A 30-meter resolution Landsat-8 False Color image viewed using RealEarth (above) displayed thin filaments of ice (brighter shades of cyan) in far western Lake Superior, just off the northern coast of Wisconsin, on 27 April 2022. Chequamegon Bay in northern Wisconsin also had significant amounts of ice remaining from the winter months. Remnant snow cover (muted shades of cyan) was also apparent across much of northeastern Minnesota and parts of northern Wisconsin.

During the preceding overnight hours, a NOAA-20 VIIRS Advanced Clear-Sky Processing for Ocean (ACSPO) Sea Surface Temperature image around 0831 UTC (below) indicated that SST values were generally around 34oF (darker blue enhancement) in the portion of the lake north of the ice filaments. Farther to the east, the West Superior Buoy 45006 was reporting a SST value of 33oF at that time.

NOAA-20 VIIRS ACSPO Sea Surface Temperature image [click to enlarge]

GOES-16 (GOES-East) True Color RGB images displayed using CSPP GeoSphere (below) showed that (1) the thin ice filaments just off the coast of Wisconsin were moving southwestward during the day, and (2) within Chequamegon Bay, significant ice fracturing began during the afternoon hours.

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

This ice filament motion and ice fracturing was the result of persistent northeasterly surface winds during the day, which gusted to 29 knots at Duluth Sky Harbor Airport (below).

Plot of surface report data from Duluth Sky Harbor Airport [click to enlarge]