HOUSTON, WE HAVE SOME ISSUES...
In the past 12 hours weather models have been showing less phasing with the weather system that's entering the Midwest. That means less intensity and a further east track which impacts snow totals and their placement. Also, related to that issue is a warm layer of air aloft hanging tough over SE Iowa and all but far NW Illinois through tonight. It's known as an inversion.
These critical factors imply many areas tonight will experience either rain, freezing rain, or sleet . Only the far northwest will see a start as snow or a change over to snow. Accumulations of an inch of two are possible NW of a line from roughly Cedar Rapids to Dubuque. Parts of EC and SE Iowa that do go over to freezing rain and sleet could see significant accumulations. Hopefully, recent warm weather has allowed ground temperatures to be warm enough to reduce problems on treated roads.
This is the projected snow tonight.
This are the projected ice and sleet accumulations tonight.
This wave of energy is gone by morning and there could be a brief lull early Saturday and then a band of snow develops and moves north into most areas by late morning or early afternoon. Most of the snow accumulations from the storm will come in this wave and 2-5" seems likely, some isolated 6" reports are possible. Little if any snow is expected in NE Iowa, especially as you head northwest of HWY 20
These are total snowfall forecasts from several models. I think they show the proper trends now.
The 3k NAM
The 12K NAM
The storm should end from west to east across my area between 9:00pm and Midnight. That's all I have time for now. Roll weather....TS
STILL A COUPLE SPOTS OPEN FOR WEATHER SCHOOL. YOU WANT TO LEARN HOW IT'S DONE IN MY WORLD THIS IS THE OPPORTUNITY...SIGN UP NOW OR FOREVER HOLD YOUR PIECE...
TSwails.com 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 firstname.lastname@example.org
GIVE THE GIFT OF WEATHER. This might be the perfect gift for that hard to buy for person this Christmas. Along with a WEATHER SCHOOL admittance voucher, TSwails will send a special holiday greeting to your weather enthusiast if you give the gift of weather with the TSwails touch!
WEATHER SCHOOL AGENDA:
WELCOME AND INTRODUCTION
Purpose: To help weather enthusiasts understand the basics of forecasting and apply the knowledge and techniques learned to construct personal forecasts.
Session 1: DATA ACQUISITION
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.
The art and science of model interpretation: Using and understanding model output. Its called guidance for a reason!
Learn how to analyze key parameters such as:
Surface and upper air data
Vorticity and energy
Wind and pressure
Session 3: MAKING A FORECAST FROM MODEL GUIDANCE
A simulation of the basic process using model output.
BREAK: A 25-30 minute recess to enjoy a catered lunch…
Session 4: SEVERE WEATHER:
Thunderstorms, tornadoes, derechoes, and squall lines.
Soundings. What are they and why should I care?
Instability (CAPE) vs (CIN) Critical interaction involving moisture, heating, and forcing.
Uncovering the ingredients of a severe weather set-up.
TVS signatures. What to look for on radar.
Role of SPC vs NWS, and your local TV station regarding the warning process.
Simulated model driven forecast of a severe weather event/tornado outbreak
Session 5: WINTER STORMS:
The key ingredients required for significant winter storm:
How to forecast the rain snow line.
How to forecast snow totals from QPF
Determining totals from snow ratios.
What to look for at the surface and at upper levels (500 and 850mb)
Model bias and determining the storm track
Simulated model driven forecast of a significant Midwest winter storm
QUESTION AND ANSWER SESSION
An open period for attendees to ask questions regarding relevant topics or issues discussed during the day.
Some final words of inspiration from the events headliners
Once again, to reserve a spot or ask questions send an email to email@example.com See you when the bell rings! Roll weather...T. Swails