RAOB Data - Selected KGSO RAOB Plots (Skew-T Diagrams)
KGSO RAOB Plot (Skew-T Diagram) from 12Z Thursday January 16, 2003.
12 hours before the onset of snow at GSO (Greensboro, NC), the GSO RAOB was dry
below 700 mb and cold enough to support snow. Low level northeasterly winds may
have been supplying weak cold air advection; however, the chief source for
maintaining enough cold air to support snow would come from evaporative cooling below 700 mb.
Click the image to enlarge.
KGSO RAOB Plot (Skew-T Diagram) from 18Z Thursday January 16, 20032.
6 hours before the onset of snow at GSO, the GSO RAOB indicated that the low level
winds had become southerly leaving the insitu cold air and limited potential for
evaporative cooling as the principal means to support the onset of precipitation
as snow. The increase of moisture aloft ensured that temperatures in the cloud
layer would be cold enough (i.e., colder than -10 C) to support snow crystals.
Click the image to enlarge.
KGSO RAOB Plot (Skew-T Diagram) from 00Z Friday January 17, 2003.
As the snow began at GSO, mid level winds had increased ahead of the approaching
short wave. The sounding was cold enough to support snow despite southeasterly
surface winds.
Click the image to enlarge.
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