Disclaimer: This site is not affiliated with the National Hurricane Center, Hurricane Hunters, Storm Prediction Center, or National Weather Service. ALL forecasts herein are the result of my analysis, (to which you will see me at times, insert excerpts from various agencies due to the nature of the importance of the information) and I am solely responsible for the content. As ALWAYS, follow the National Hurricane Center, National Weather Service, and your local Emergency Management officials for emergency decisions. In addition, this is strictly a FORECAST OFFICE. I CANNOT make decisions regarding travel plans, etc. My purpose, is to provide you the information, based solely on information I analyze, and the accuracy of the information at hand of the time of analysis, so you may make informed decisions.
(T. F. “Storm” Walsh)
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Please be aware, even though I do not post every night, rest assured I am continuously monitoring various areas for any significant weather. I will be taking Sundays off (family time), unless we have active systems that may be posing a threat (i.e. Tropical, Winter Weather, Coastal Storms, etc.).
I will reiterate, my forecasts are based on the available information at the time of analysis, and are only as accurate as the information analyzed and the solutions provided.
Good evening everyone!
From here on out, I will be moving away from severe weather forecasts, unless the threat is forecast to produce an outbreak, or significant tornadoes. Then, I’ll break from tropical weather and report on any severe weather. Again, please remember, my forte and specialty is tropical storms and hurricanes. Given I work until late afternoon, I cannot analyze and write a synopsis for both. I will post the SPC link for you to visit and stay updated on any severe weather threat. Thanks for your understanding.
STORM PREDICTION CENTER HOME LINK
Those of you that have paid attention to my previous tropical forecasts this month, I’m sure you’ve seen me mention the favorable signals in regard to development, and possible development in the Caribbean in a few days. This update will be short, as I see no sense in posting graphics that have shown the same conditions for the past 3 days. The Global models still show a favorable upper level outflow pattern in the forecast, although the GFS is more oriented in the extreme W. Caribbean, while the ECMWF is more over Central America to the extreme E. PAC, with the CMC being in the camp of the extreme E. PAC. Various modeling of the GFS and ECMWF still indicate strong upward vertical velocities occurring during the next few days, and phase space diagram forecast still put the MJO in phase 8, between the 19th and 23rd of the month. In a nutshell, all the conditions I have mentioned are still forecast to be favorable for development.
Now, we have the ECMWF onboard showing an area of low pressure in the BOC, by the morning of the 24th, and then dissipating it, while the GFS STILL indicates storm development.
ECMWF MSLP ANOMALY FORECAST
GFS MSLP ANOMALY ANIMATION
The ECMWF EPS Tropical Cyclone Probability forecast still indicates a 45-50% probability of development in the Caribbean during the next 72-96 hours from 12Z this morning, with the highest probabilities moving into the EPAC, and some lower probabilities moving into the GOMEX.
ECMWF TC PROBABILITY FORECAST AND ANIMATION
Right now, based on the discrepancy between the ECMWF and GFS on location of the possible low, it is not written in stone that development is imminent. I believe where the problem lies, is that models could be misinterpreting the forecast location of the CAG. IF development does occur, I believe the catalyst will be a combination of the CAG, and a tropical wave approaching from the east. What kind of gives a hint, is what the NHC mentioned in their tropical weather discussion today, which would reference the CAG:
Looking ahead, a broad area of low pressure is expected to form over northern Central America by the end of the week. Winds and seas across the basin may increase through late week as this broad low pressure forms and the ridge north of the area strengthens.
A feature called the CAG (Central American Gyre) could begin to cross into the extreme W. Caribbean.
GFS 850 MB WINDS FORECAST (CAG IN PINK)
Here is an article from WBRZ news explaining the CAG:
It is noted in current satellite loop imagery, there has been an increase in convection over the past 24 hours over the EPAC and Central America.
GOES 16 IR AND SWIR ANIMATION
I know everyone is looking for a “definite” answer as to whether or not we are going to see development. Again, this cannot be safely determined at the moment. However, in my analysis this evening, it appears we should know more between the 21st and 24th, when the forecast favorable conditions should be at peak. Thereafter, both the GFS and ECMWF CHI200 Anomalies forecast indicates a weakening in upward motion. So, in the meantime I will continue to monitor the area for any significant changes. I wouldn’t be too concerned at this time, however please follow my updates, in the event we do see something organizing on satellite imagery.
You may direct any questions by contacting me personally, ANYTIME, at: email@example.com
Have a blessed evening!
T. F. “STORM” WALSH III
GMCS, USCG (ret)
METEOROLOGIST / HURRICANE SPECIALIST /SEVERE WEATHER SPECIALIST
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