Saturday, November 21, 2015

Here And There Saturday Morning, November 21st

This morning's 12 UTC upper-air data from TWC (above) show 15 to 20 kts winds just above the surface inversion. These winds should mix down quickly to the surface as the sun eats away the inversion. The WRF-NAM forecast below is for 10-m winds valid at 11:00 am MST this morning. The winds may be a bit of a hindrance for Tucson's big El Tour de Tucson bicycle races today.

Northern Illinois and southern Wisconsin are being hit by a pre-Thanksgiving snow storm today - surface plot above is for 1410 UTC this morning and it shows numerous reports of moderate to heavy snowfall. Expect serious flight delays today in and out of Chicago. Webcam shot below is from the campus of Northern Illinois University in DeKalb, Illinois.

Further west, morning temperatures have dropped to -10 to -20 F in the northeastern part of Wyoming. Webcam shot below shows Old Faithful geyser, but no spectators out and about yet. This from Jack Hales webpage - link to the right.

At low-latitudes, Tropical Storm Rick (above) is a very marginal storm; however, the trailing disturbance near Central America (yellow X) is expected to become Tropical Storm Sandra by early next week. Currnt NHC forecast for Rick is shown below.

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