Archive for December 31st, 2009

Watching Tonight Closely

Rainfall continues to increase back to the west across portions of Arkansas and Louisiana with our mid level wave that continues to dig toward Coastal TX/LA.  A surface cold front is evident across Central TX/LA/MS this hour and is pushing in our general direction.  There is a bit of conflicting data currently that we could deal with some rain and snow later tonight.  If I were placing bets, I would stick with rain as the thermal profile will be trying to cool as the moisture is falling.  However, there is a chance that the northern fringe of this precip shield could change over to snow later tonight as it moves into the area by early tomorrow morning.

We will continue to monitor surface temperatures and pressure profiles for any factors that could throw a “kink” in the current thinking.  The best change of any flakes would be from Livingston to Clanton to Roanoke.  Monitor the Alabama Storm Trackers for further updates…

Next System….Rain or Snow?

The rain is leaving the area this morning as our first shortwave has moved off of the east coast and an evident dry slot has moved across the region.  Foggy conditions are evident across the entire area this morning through midday….some of which is dense.  Our next system showing up on water vapor imagery and upper air charts is currently progged over portions of SW Kansas, Oklahoma, and the Texas Panhandle region.  This system continues to dig and should be near the Gulf Coast of Texas later this evening.  It looks as if precipitation will break out east of this wave and will be in the form of light rain and snow.  Thermal profiles are going to be borderline as this system moves across portions of Central Alabama later tonight and early on Friday.  At this point I think a rain/snow mix would be possible areas on the northern edge of the precipitation shield.  This will have to be monitored since there has been alot of model inconsistency. 

Temperatures will plummet this weekend behind the wave and surface front.  Temperatures will have a hard time getting above 45° on Saturday and above 40° on Sunday.  We continue to forecast a true arctic outbreak on next week as cold air advection reigns supreme from the Arctic.  More on individual system as they approach on Tonight, Monday, and Thursday of next week.