Thursday, December 20, 2012

9:30am Weather Update - Updated Snow Matrix

The storm is coming together quickly and for the most part according to plan.

Temperatures are already plunging behind the cold front.  During my 7 minute commute to work I noted the highly-inaccurate temperature on my car.  It started at 52° and within minutes dropped to 45°.  Winds have gusted to 52 mph in St. Louis.  It's here!

Let's talk snow... Models overnight seem to be shifting the storm track a little further southeast than they initially advertised.  For many areas of the Midwest, the question becomes how much snow will accumulate in the wrap around portion of the storm.

Here is a look at this morning's new run of the NAM computer model.  This shows snow through Saturday morning.

(Click the image to see larger version.)


Honestly, I'm not overly confident in the amounts the model is projecting.  I think in some areas they may be a bit high.

I've put a new snow matrix together for various locations across the Midwest.  This matrix is a compilation of five previous computer model runs (0z Euro, 0z GFS, 6z NAM, 6z GFS and 9z RPM) and the average of all the data for the specific city.


CITY
0z Euro
6z GFS
9z RPM
6z NAM
AVG
Columbus, IN
2.0”

0.9”

1.5”
Bloomington, IN
2.6”

2.3”
1.4”
2.1”
Indianapolis
2.6”
0.3”
1.0”
1.5”
1.1”
Lafayette, IN
1.0”
0.5”
0.7”
1.9”
1.0”
Moline, IL
6.4”
8.7”

2.2”
5.6”
Muncie, IN
1.2”
2.0”
1.0”
1.8”
1.5”
St. Louis
1.3”
0.1”
0.7”
0.3”
0.5”

0 comments:

Twitter Delicious Facebook Digg Stumbleupon Favorites More