Invest.94L: Likely Tropical Threat for U.S.
#1
Posted 05 September 2005 - 09:58 AM
Yesterday, Invest.94L was designated in the southwest Atlantic. Over the past 6 hours, it has tracked to the west-southwest (258°) to 25.3N 78.7W. Its current intensity rating is 1.0.
Unfortunately, based on a combination of the model guidance and historic tropical climatology, this system has high probability of threatening U.S. landfall and will likely reach at least tropical storm strength at some point. Hurricane strength is possible.
Most of the models take this system across Florida or Georgia. A few recurve it. However, the evolving synoptic situation tends to argue against recurvature for this system. In an extreme case, it could try to escape before being pulled back toward the United States ala Hurricane Dawn (1972). Given its current motion, I don't believe that scenario will play out.
Historic climatology--going back to 1940 for a somewhat larger sample--reveals that 4/5 (80%) tropical cyclones that developed in the 23.3N-27.3N/76.7W-80.7W region eventually made U.S. landfall. There is some chance that this system could well track across Florida into the Gulf of Mexico. Both the BAMS and GFDL have a particularly disturbing track.
For now, I believe:
• Invest.94L will likely threaten U.S. landfall
• Invest.94L should become a tropical storm at some point
• Invest.94L could eventually attain hurricane strength
• There is a chance that Invest.94L could move into the GOM and eventually threaten a portion of the Gulf Coast.
Unfortunately, based on a combination of the model guidance and historic tropical climatology, this system has high probability of threatening U.S. landfall and will likely reach at least tropical storm strength at some point. Hurricane strength is possible.
Most of the models take this system across Florida or Georgia. A few recurve it. However, the evolving synoptic situation tends to argue against recurvature for this system. In an extreme case, it could try to escape before being pulled back toward the United States ala Hurricane Dawn (1972). Given its current motion, I don't believe that scenario will play out.
Historic climatology--going back to 1940 for a somewhat larger sample--reveals that 4/5 (80%) tropical cyclones that developed in the 23.3N-27.3N/76.7W-80.7W region eventually made U.S. landfall. There is some chance that this system could well track across Florida into the Gulf of Mexico. Both the BAMS and GFDL have a particularly disturbing track.
For now, I believe:
• Invest.94L will likely threaten U.S. landfall
• Invest.94L should become a tropical storm at some point
• Invest.94L could eventually attain hurricane strength
• There is a chance that Invest.94L could move into the GOM and eventually threaten a portion of the Gulf Coast.
#9
Posted 05 September 2005 - 10:31 AM
Unfortunately, the ensemble mean sfc and 500 pattern argue for a track across fl into the gulf. The gfdl is very bullish on the system and tracks it towards la. It's still to early to start calling for a la/ms landfall but the pattern certainlly looks favorable for another gulf storm.
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#11
Posted 05 September 2005 - 10:36 AM
If this becomes a hurricane and does head for NO, which I certainly pray it doesn.t how soon does the nhc pick up on this and warn those in its way? If the gfdl is correct, something got to be done for them in New orleans. My lord, another hit would be too much? What are the circumstances for it comming up the coast? I am too much of an amateur to know much about this, but don is so good and his post outstanding. The pattern just seems to be repeating no matter where the storm forms.Why is this happening? This has been discussed in other threads. I am asking questions. The east coast seems to be in a vacum. Anyones ideas??
#15 Guest_ConnMan_*
Posted 05 September 2005 - 10:56 AM
WX4caster88, on Sep 5 2005, 11:43 AM, said:
That ens mean looks like it might go further west, maybe I'm reading wrong. Katrina was initially expected to hit the panhandle, and kept trucking west. Though, the location of this storm would make a more northerly component have a much quicker/easterly landfall.
I suppose it's too early to really think about a landfall point. This season says it will be a N GOM storm, somewhere between NO and Pensacola.
#17
Posted 05 September 2005 - 11:22 AM
donsutherland1, on Sep 5 2005, 10:58 AM, said:
Most of the models take this system across Florida or Georgia. A few recurve it. However, the evolving synoptic situation tends to argue against recurvature for this system. In an extreme case, it could try to escape before being pulled back toward the United States ala Hurricane Dawn (1972). Given its current motion, I don't believe that scenario will play out.


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