Archive for August, 2011|Monthly archive page

“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.

Advertisements

Photo Of Irene From Space – 8-28-2011

The photo below is actually from a scan of the “full disk” of earth from the GOES-13 satellite.  I have cropped the original in order to concentrate upon Tropical Storm Irene.  Tropical Storm Jose also shows up in the image; it is very small.  To find it look for a small blob of clouds, bright white (about half the width of the state of Florida and located off the Carolinas  and next to Bermuda).  More information follows after the image.

TWO INDEPENDENT LEFT CLICKS WILL ENLARGE TO THE FULLEST.

– THANKS TO NOAA FOR THIS IMAGE –

TIME OF PHOTO – 2:45 pm Eastern Daylight Time

DATE – Sunday, August 28, 2011

ALTITUDE OF SATELLITE – about 22,300 miles

TIME NEEDED TO SCAN FULL DISK OF EARTH – about 26 minute

LINK TO MORE INFORMATION ON  SATELLITE IMAGE –  http://noaasis.noaa.gov/NOAASIS/ml/imager.html

OFFICIAL IRENE FORECAST – CONE OF UNCERTAINTY – FRIDAY 8 PM EDT

TWO LEFT CLICKS FOR TOTAL ENLARGEMENT

This is self-explanatory.  If you are anywhere within the cone of uncertainty please do not be careless in your thinking.  Stay alert, keep a clear head, and do not allow that epidemic disease, terminal uniqueness, to cause you to think that “it” always happens to the other guy (or gal).  Do not take any unnecessary chances.  Be patient, use common sense, and remember that this too shall pass.

My thoughts are with you.

For previous reports go to the blog tab near the upper left of the page and then scroll down.

Clouds From Irene Over Citrus County, Florida

I was out pulling weeds around 8 pm EDT at my home in Citrus County, Florida when I saw cirrus clouds moving along at a fairly good clip.  After taking a few quick photographs, I went to my computer to confirm what I suspected I was seeing.  I consulted both an up-to-date satellite visible loop and an infrared loop.  Sure enough, the cirrus I was observing marked the outermost segment of an outflow band from hurricane Irene.

Here is a photo as I faced the WSW.    (The gray clouds are little fracto-cumulus at a much lower altitude than the very high cirrus).

– – LEFT CLICK ON PHOTO TO ENLARGE –

The graphic below shows the general direction of movement of both the inflow and the outflow of a hurricane in the northern hemisphere.  This particular one is hurricane Ike of 2008.

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.

Forecast for Irene by the European Model – posted 8-24-2011

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/

Hurricane Irene is now a category 3 storm.

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.

The graphic that follows is a 72 hour (3 day) forecast position that originated at 0000 Greenwich Time on the 24th (which is 2000 hours on the 23rd EDT time – or 8 pm).   The path that this European Model predicts correspond closely with today’s official forecast track of the National Weather Service.

On this graphic, and most on this site, two independent left clicks will enlarge to the fullest.  The poorness of the resolution is due to considerable enlargement from the original.

2 LEFT CLICKS FOR FULL ENLARGEMENT

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.

IRENE – SPAGHETTI CHART – 8-22-2011 NEAR MIDNIGHT EDT

THIS IS A TIME-SENSITIVE POSTING SUBMITTED 8-22-2011 AFTER 11 PM EASTERN TIME.

 

 

Hurricane Irene is now of GREAT CONCERN to the Bahamas.  Based upon my observation of the ECMWF (European Centre for Medium-Range Weather Forecasting) model  – it now looks as though South Carolina or North Carolina could be the landfall site though the statistical mean mid-line continues to “windshield-wiper” to the east.

Here is Jonathan Vigh’s spaghetti chart effort releases at 8 pm Eastern Daylight Time, 8-22-2011.  The numbers along the forecast model tracks are “hours from the forecast release time.” OFCL is the designation for “official.”  The OFCL is remarkably close to the ECMWF model track which does not show on this graphic.  To observe it, go to my “Tropical Weather” links to the right of this page and click on “Penn. State U. Models Page.”

THIS IS NOW A SERIOUS CAT. 2  HURRICANE WITH POTENTIAL FOR STRENGTHENING.

Graphic courtesy of Jonathan Vigh, Colorado State University

– LEFT CLICK THE GRAPHIC TWICE FOR MAXIMUM ENLARGEMENT –

Irene Is Now a Hurricane – 8-22-2011

PLEASE NOTE – THIS IS A TIME-SENSITIVE POSTING

Below is the 11 am (Eastern Daylight Time) cone of uncertainty for hurricane Irene from the National Hurricane Center.  Remember, only minor shifts toward the west or east can change the complexion of things drastically.  Such changes are common – in fact, some meteorologists refer to resultant realignments of the spreading cone as “windshield wipering.”  Left click the image twice for full enlargement.

LEFT CLICK TWICE FOR FULL ENLARGEMENT

IRENE – 8-21-2011 SPAGHETTI CHART

THIS IS A TIME-SENSITIVE POSTING SUBMITTED 8-21-2011 AFTER 11 PM EASTERN TIME.

IT IS NOW OUT OF DATE.  PLEASE CLICK ON THE BLOG TAB AT THE TOP LEFT OF THIS PAGE AND SCROLL DOWN TO LOOK FOR A MORE RECENT REPORT ON THIS STORM WHICH IS NOW A SERIOUS HURRICANE (posted 8-22-2011 near midnight EDT).

Invest (investigation) 97L (or 97AL) has become Tropical Storm Irene.  My concerns for Florida remain and it looks to me as though the east coast is the part of Florida most likely to be influenced by the system.  If it does skirt the coast at least that region will be subjected to the left-hand leading quadrant which is almost always less powerful than the right-hand leading quadrant.  Based upon my observation of the ECMWF (European Centre for Medium-Range Weather Forecasting) model  – it now looks as though South Carolina could very well be the landfall site.  Of course many changes can occur over the next few days and much depends upon the movement and strength of a trough dipping down over the Eastern U.S.A.  One of my favorite sources, Dr. Jeff Masters wrote yesterday:

“The best model for predicting the timing and strength of such troughs over the past two years has been the ECMWF (European Center model).  The European Center does not permit public display of tropical storm positions from their hurricane tracking module of their model, so we are unable to put ECMWF forecasts on our computer model forecast page that plots positions from the other major models.  Remember that a 7-day forecast by even our best model will be off by an average of over 700 miles, so it is too early to tell what part of the U.S. might be most at risk from a strike by 97L. This weekend would be a good time to go over your hurricane preparation.”

In the future, if you wish to view the ECMWF model loops go to the right of this page and under the heading of  “Tropical Weather” click on the link to Penn. State U. Models Page.  Scroll down until you find it.

Here is Jonathan Vigh’s spaghetti chart effort releases at 8 pm Eastern Time, 8-21-2011.

TWO LEFT CLICKS WILL ENLARGE THIS FULLY FOR YOU