The 18z (late afternoon) model runs are all in and I'm passing them along. All but the GFS have colder thermal profiles. If that holds most of the icing will be from roughly HWY 30 south, especially I-80 south. All areas will see snow though before the transition in the south sometime Friday evening.

I think totals from approximately I-80 south will be in the 2-4" category (heaviest near I-80) with the potential of up to 1/4" of ice. North of I-80 we are looking at 4-6" totals, perhaps a few 7 or 8" amounts where snow ratios will be higher. Some ice totals of 1/10" between I-80 up to near HWY 30

Speaking of snow ratios. I used snowfall forecasts with higher ratios built in (Kuchera method) because that will be the case for at least 50 percent of the event in most areas. The standard 10:1 ratios are 1-2" lower. So, here is what I have for model output. These are not forecasts, just the range of options available to make forecasts from. For a number of reasons, its thermal parameters and total precipitation totals to name two, I like the EURO best.



The 12K NAM...too high I think.

The SREF model means

The 3k NAM

The EURO shows this for ice potential.

Here's where the warnings and advisories are in effect.

The fun begins around noon Friday. I will have several more updates in by then so stay tuned. Roll weather...TS

LAST THING, STILL 2 SPOTS AVAILABLE FOR WEATHER SCHOOL. A GREAT BUNCH OF FOLKS COMING ALONG WITH SOME TERRIFIC CASE STUDIES YOU WILL ENJOY, ESPECIALLY 2011, THE YEAR OF THE TORNADO. AN IN DEPTH LOOK AT THE SUPER OUTBREAK OF APRIL 27TH IN ALABAMA AND THE JOPLIN TORNADO WHICH TOOK THE LIVES OF 160. YOU WANT TO LEARN WEATHER, YOU WANT TO BE HERE. GET THE DETAILS BELOW... is offering a very special and unique opportunity to learn first-hand the ins and outs of weather forecasting with one of the best meteorologists in the Midwest along with his team of expert meteorologists.

That’s right… You want to forecast right along with Terry Swails, well now you can. He’s teaching weather with TSwails newest program called WEATHER SCHOOL. The opening bell rings this January and you can be a member of the very first graduating class. The one-day forecasting seminar for weather enthusiasts will be held at his home in January. It’s not your typical run-of-the-mill school. There will be no tests, but Terry, Rebecca, and Nick will cram your head with so much knowledge, it’ll be spinning like a tornado before the day is over.

You want to know the essential online sites to use for models, radar, and the basic weather tools? DONE! You want to understand the structure of models and the role they play? DONE! You want to be able to construct forecasts from the ground up? DONE!

WEATHER SCHOOL will be presented in a seminar-type format where you'll have the ability to ask questions and dig deep. You’ll get the scoop on data acquisition, model analysis, severe weather, and actual forecasting from the big dog himself, T. Swails. With 43 years of experience and an uncanny ability to break the science down, you’ll open the door to forecasting like never before.

Along with the head master T. Swails himself, meteorologists Rebecca Kopelman and Nick Stewart of KGAN TV will be there to lend their knowledge and experience to the discussion. It will be fun, informative, and factual! This is the day for you to see, feel, and experience what it’s like to be in the hot seat of a meteorologist.

The seminar will be held January 25th and will last from noon until 5:00pm. We have limited seating and the cost is $99 dollars per person. A catered lunch will be provided. Again..not a lot of seats so reservations with a pre-payment are required. Sorry, no refunds. If there’s enough interest, a second session will be added in early February. To register or get additional information send an email to

GIVE THE GIFT OF WEATHER. This might be the perfect gift for that hard to buy for person. Along with a WEATHER SCHOOL admittance voucher, TSwails will send a special greeting to your weather enthusiast if you give the gift of weather with the TSwails touch!



Purpose: To help weather enthusiasts understand the basics of forecasting and apply the knowledge and techniques learned to construct personal forecasts.


The essential on-line sites for models, observations, satellite and radar images, and general weather data.

Session 2: ANALYSIS:

Determining your objective goals. Short term, intermediate, or long-term. Understanding the process of analysis and its relationship to forecasting.

Model options and choices. What to use and when!

The GFS, EURO, NAM 3k, NAM 12K, Canadian, HRRR, MJO, ensembles, teleconnections, etc.

Locating, learning, and knowing what’s essential to make a reliable forecast.