Archive for the ‘European Model Forecast’ Category

“GULF OF MEXICO DEVELOPMENT POSSIBLE LATE THIS WEEK” – 8-30-2011

Shortly before noon Eastern Daylight Time today (8-30-2011) Dr. Jeff Masters published this statement:

“Gulf of Mexico development possible late this week”

“Several of our best computer models for predicting formation of tropical cyclones, the GFS and ECMWF, are predicting that an upper level pressure interacting with a tropical wave now over the the Western Caribbean could combine to spawn a tropical depression in the Gulf of Mexico late this week or early next week. The formation location is likely to be off the coast of Louisiana or Texas, but the track of the system is hard to predict at this point.” (end quote) –

 Though this is far too early to tell, here is a six day look into the ECMWF model’s “take” on our tropical weather. It was released at 8 pm EDT, 8-29-2011 and projects out six days (144 hours).

Notice, in addition to the system in the Gulf of Mexico, the position northeast of Puerto Rico of what is currently Tropical Storm Katia.  Some are predicting that she will be of hurricane strength by the time 6 days pass.

 The error 6 days out can be enormous so take this for what it’s worth. I recommend your being mindful that the ECMWF has been doing well for the last couple of years. For instructions on viewing the model in animated form on WeatherUnderground.com, please use the following link:  https://cloudman23.wordpress.com/2011/08/25/ecmwf-model-run-the-european-model/

  NOTE: ECMWF = European Center for Medium -Range Weather Forecast

Two left clicks will enlarge to the fullest.

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ECMWF MODEL RUN – THE EUROPEAN MODEL

When the European Center for Medium-Range Weather Forecast model is running, here is my favorite site for viewing:

For a lot of different reasons, but mainly because I enjoy the insights of Dr. Jeff Masters in his weather blog, I use WeatherUnderground.com.  For future reference, a link to his blog is under the Blogroll category at the right margin of this page.  In fact, it’s the first listed.

For the ECMWF Model Run, click on the following link and then follow my instructions exactly:  NOTE:  YOU MIGHT WANT TO COPY THE INSTRUCTIONS BECAUSE ONCE YOU CLICK ON THE LINK THIS PAGE WILL BE GONE UNLESS YOU CLICK BACK –

 

http://www.wunderground.com/wundermap/

  1. At the upper left of the image, click on the “continent” tab.
  2. Scroll down the menu on the right margin and click in the box labeled “model data”.
  3. Another menu dropped down. Click on the “model” arrow and select ECMWF.
  4. Make sure the “map type” remains on MSL which stands for “mean sea level.”
  5. Click on the “forecast” arrow and wait patiently for the load.
  6. After it has loaded fully it should loop. If you want it to stop click on the button at “forecast.”

Though the European Model is not always right (none of them are) it has done the best job for the last two years in situations akin to this one with hurricane Irene.  The National Weather Service gives credence to this model though you will not see it indicated on the official spaghetti charts and such.  In fact, lately, the NWS official forecasts have been close to that of the ECMWF model runs or, if you please, the ECMWF model runs have been close to the official forecasts of the NWS.  To be sure, there will be times when there is little agreement – at which time I expect to lean toward the NWS advisories.

Early U.S. Landfall forecast for Irene by the European Model – 8-23-2011

 

 

 

 

This posting is time-sensitive and is now out of date.  For step by step instructions on access to an animated loop of the most current ECMWF (“European”) model go to the following link:  https://cloudman23.wordpress.com/2011/08/25/ecmwf-model-run-the-european-model/

 

 

Mind you, I am not formally trained in forecasting.  I am conveying to you what I am deriving from others and when I include my personal opinion I try to make that clear.  Also, very small changes in course can make a huge change in the location of a storm’s landfall, particularly when it is so far out as is Irene this moment.  For example, I am in West-Central Florida, 17 miles inland from the Gulf of Mexico but none-the-less, you can bet your sweet bippie that I’m on the alert.  SO IF YOU ARE WITHIN THE PUBLISHED CONE OF UNCERTAINTY IT WOULD BE FOOLISH TO IGNORE THIS STORM EVEN THOUGH YOU MIGHT NOT BE CLOSE TO WHERE IT IS CURRENTLY PREDICTED TO GO.  That is not just my opinion but also the opinion of National Weather Service forecasters.

TO FIND THE MOST RECENT CONE OF UNCERTAINTY DEPICTION, GO TO THE RIGHT-HAND MARGIN OF THIS PAGE AND UNDER “TROPICAL WEATHER” CLICK ON “NATIONAL HURRICANE CENTER HOME.

Over the last two years the European Model has done the best at predicting the paths of tropical systems under these particular circumstances.  The graphic that follows is a 5 day forecast position that originated at 0000 Greenwich Time on the 23rd (which is 2000 hours on the 22nd EDT time – or 8 pm).  A lot can happen in 5 days so take this for what it’s worth.  This does correspond closely with determinations made by the National Weather Service today.

I will check the next run (they occur at 0000 and 1200 or twice a day – Greenwich Time) and if there is a significant change I will post it.

On this graphic, and most on this site, two independent left clicks will enlarge to the fullest.