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qg_omega

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Posts posted by qg_omega

  1. 58 minutes ago, psv88 said:

    I meant last night. Was pretty wild. Very good thunder and lightning. Loudest thunder since i moved to Commack in March 2015. nearly 4" of rain and howling winds. 

    amazing how localized it was but I guess thats convection for ya

  2. 49 minutes ago, donsutherland1 said:

    Based on Maria's 11 am position (18.4°N, 66.5°W) over northern Puerto Rico almost between Arecibo and San Juan, there is little change in the probability of landfall based on the historic data set and the data set adjusted for the current synoptic pattern. It appears that Maria will likely find a weakness in the ridging to its north-northeast somewhere in the vicinity of 72.5°W-73.5°W.

    This scenario is consistent with the 9/28 0z run of the ECMWF. The ECMWF has displayed consistently superior performance throughout the duration of Maria's lifetime so far. By 72 hours, no model has come close to its performance. For purposes of comparison, the GFS has an error that is twice as large as the ECMWF. The lower-verifying GFS, not the ECMWF, has periodically flirted with landfall scenarios on a number of runs over the past two days.

    By the time Maria reaches the weakness, it will likely turn northward and then come under the increasing influence of Jose's still expansive circulation. Most of the overnight guidance resulted in Jose's circulation shrinking especially beyond 72 hours, but not enough to allow Maria to escape its influence. Therefore, if the guidance is right, Maria should then turn northeastward and away from the U.S. Coast.

    Based on the overall spread in the EPS and GEFS combined with the adjusted data set (1-in-3 probability of landfall), there still remains some possibility of landfall on the mainland U.S. My thinking of a 30% probability may be a bit generous, but there haven't been sufficiently large changes in the guidance for me to change that idea.

    Possible factors that could increase Maria's landfall prospects include:

    1. More expansive ridging to Maria's north that results in its tracking farther west than currently modeled
    2. More persistent ridging  to Maria's that results in a delayed turn to the north toward the influence of Jose's circulation
    3. More rapid weakening and/or departure of Jose than currently modeled
    4. Slower forward motion for Maria than anticipated over the next 72 hours

    Disagree, we want Maria to speed up to increase chances of a US landfall.  Jose is not a big issue, ideally we want Jose to move as far SW as possible to grab Maria and sling it NW.  The faster Maria moves the better chance it has at impacting the US ahead of a massive trough foretasted over the area by next weekend. 

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