1/28/2010 Winter Storm Update - 7am (13Z)

Moderate to heavy sleet ongoing. 27F outside. Streets covered in a nice layer the icy pellets right now. Also, saw distant lightning flash. Concern with the warm layer aloft and how soon it cools to change everything over to snow. I saw a few snow flakes mixing in just now, so perhaps that will happen in the next couple of hours. Awaiting the 12z upper air sounding from Amarillo to get a more accurate picture of the vertical temperature profile.