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This loop of GOES-8 Sounder 7.5 micrometer InfraRed (water vapor) imagery shows evidence of the northeastward transport of moisture (gray to black enhanced features) along the warm conveyor belt flow from southern Alabama and northern Georgia into the Mid-Atlantic region on 09 March 1999. This moist ascending flow was feeding into the rear portion of the cold cloud band approaching the East Coast, helping to prolong heavy snow rates over that area.
An isentropic analysis along the 300K surface is overlaid on the 11:46 UTC image (isentropic data derived from 12:00 UTC rawinsonde reports).