Thursday Evening Report
Watching model data running, and observing developments to the west. Remember, at some point you quit using NWP (staring at computer model output) and simply look out the window.
Precipitation continues to increase over Texas with the impulse riding down the back side of the long wave upper trough over the central U.S. We are evening seeing some echoes on the Little Rock radar, although most of that is not reaching the ground.
The 00Z Shelby County Airport sounding shows a narrow layer of moisture around 900 mb, with lots of dry air above that level. Warmer air aloft also shows up; the temperature is 28 degrees at 2,600 feet, but rises to 45 degrees at 4,500 feet. This means the cold air is shallow for now, but that will change late tomorrow night and early Saturday as the cold air gets deeper.
The 00Z NAM puts a band of light snow over Central Alabama at 6:00 a.m. Saturday, which jives up nicely with our forecast thoughts:
The 00Z RPM shows no accumulated snow for Alabama:
Still not enough evidence to change our forecast, which is outlined in the afternoon discussion below.
The next detailed discussion and Weather Xtreme video will be posted by 7:00 a.m.!
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James Spann is one of the most recognized and trusted television meteorologists in the industry. He holds the AMS CCM designation and television seals from the AMS and NWA. He is a past winner of the Broadcast Meteorologist of the Year from both professional organizations.Subscribe
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