Monthly Archives: February 2019

Low cloud / fog over snow covered ground on 25 February 2019

During the overnight hours of 25 February 2019, low clouds and fog developed over portions of northwest Kansas, eastern Colorado and southwest Nebraska.  The low cloud and fog developed over a field of snow on the ground from a recent … Continue reading

Posted in Ceilings, Fog, Visibility | Leave a comment

Popocatépetl Volcanic Eruption

Popocatépetl Volcano erupted overnight, spewing volcanic ash emissions, from 0200-1600UTC, 15 February 2019. Geostationary and polar-orbiting satellites observed this atmospheric phenomenon from 00-16 UTC, 15 February 2019. GOES-16 3.9um  A hot spot (i.e. white, warm brightness temperature) is produced from … Continue reading

Posted in Aviation Weather, GOES R, POES, Satellites, Volcano Weather | Leave a comment

14 February 2019 California Atmospheric River event

Advected Layer Precipitable Water loop: Blended Total Precipitable Water loop: Percent of Normal TPW loop:

Posted in Heavy Rain and Flooding Issues, Hydrology, Satellites | Leave a comment

VIIRS Captures Ice/Ocean Movements

By Lewis Grasso and Jorel Torres VIIRS captures interesting imagery in the Arctic. From 0314 UTC to 1233 UTC, 13 February 2019, VIIRS, on-board NOAA-20 and S-NPP, imaged fascinating features in the Arctic. In particular, imagery from Band I4 (3.74um) … Continue reading

Posted in Miscellaneous, POES, Satellites | Leave a comment

4 February 2019 significant ice storm in the Upper Great Lakes

On 4 February a shortwave tracked across the Upper Great Lakes towards the east, ahead of the shortwave, anomalously high moisture at low to mid-levels existed which contributed to a historic ice storm for the region. The NWS forecast office … Continue reading

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