Alabama hasn’t had a lot of luck with White Christmases. In Birmingham, for instance, it’s only dusted snow once, and that wasn’t an actual measurable accumulation.
It’s no wonder then that the prospect of snow tomorrow has sent chills of excitement down the spines of Alabamans who have had their eyes glued to the computer models this week.
On his AlabamaWx blog, ABC 33/40 broadcast meteorologist James Spann and Tim Coleman have been trying to temper excessive expectations for days now, even while trying to patiently explain the promising but multifarious model output. On Wednesday, for instance:
There is very little skill in forecasting winter storm events in Alabama until you get with about 48 hours of the event. Nobody knows the exact snow placement and amount this early. Even the know-it-alls don’t know, even though they will never let you bebutlieve it (those of us that have been doing this a long time professionally have had enough doses of humility over the years to be firmly out of the know-it-all camp). We can begin talking accumulation placement tomorrow when that 48 hour window opens up.
and:
The NAM and the GFS, the two primary American models, show very limited moisture, and not much more than a dusting of snow for the I-20 corridor. The deepest moisture will be over the southern half of the state, where initially the precipitation will fall in the form of rain.
The ECMWF and the GEM, the European and Canadian models, are a little more bullish on moisture for North Alabama, but it is still limited. Both of these models suggest enough snow to get 1/2 to 1 inch on the ground. Which, if happens, would be historic for Birmingham. Up north, everybody would completely laugh at the fuss this is creating.
All this talk about what the computers say apparently gets a violently different reaction from folks depending on the stakes. Therein lies a lesson in communicating with science as we approach a meeting devoted to the topic. Wrote one commenter yesterday on AlabamaWx:
Yeah I’m.pretty upset that one.minute the models are right on for a winter storm then the next it flakes out. It literally crushes a lot of peoples wants and all but atleast we did have a chance a day ago! Now its all a good memory.
Just the day before, Spann wrote:
I am amazed at the angry tone of e-mails this evening… some are simply livid that I am not predicting a big Christmas day snow storm that would be historic for Alabama. I will probably never understand why winter weather brings out such passion and emotion. Seems to be more intense every year. Never was like this in the “old days”… one guy called me an “idiot of historic proportion” because “his forecast” was for 6 inches of snow for Birmingham. Wow.
Apparently, despite the cool dispassion of mathematics and computers, it is actually easier for people to rant at computers churning out uncertainty than