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January 4-6 Coastal Bomb Observations/Nowcast


Baroclinic Zone

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  On 1/4/2018 at 6:44 PM, CoastalWx said:

Large pressure falls, highest tides of the year, NE fetch offshore..rising sea levels. We flood.

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Good point about the offshore fetch, the easterly flow far off shore (I note PVC is NNE) must be sloshing the water into the harbor.  Incredible that there wasn't a ripple in the water yesterday off Winthrop.

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  On 1/4/2018 at 6:47 PM, apm said:

Good point about the offshore fetch, the easterly flow far off shore (I note PVC is NNE) must be sloshing the water into the harbor.  Incredible that there wasn't a ripple in the water yesterday off Winthrop.

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Ekman spiral. Water will move to the right. So, N winds will help pile water onshore.

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  On 1/4/2018 at 4:59 PM, Baroclinic Zone said:

Here's the RAP as Will alluded to.  Full-frontal nudity if this verifies.  We'd see 24" reports if this verifies.

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Full-fronto nudity?

  On 1/4/2018 at 5:01 PM, WintersComing said:

Question....Anyone know what radar setting/image depicts snow growth?  I saw Ryan tweeted an image earlier indicating it.

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Check ZDR (differential reflectivity). Normally around 0 for snow, but pure dendrites start pushing it back up towards 0.5-1 dB.

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  On 1/4/2018 at 6:47 PM, weathafella said:

Logan 6.5 as of 1pm.  Considering I was at 7 around 12:30 and +SN and considering the Logan observations are t seems a bit low.

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Hard to measure here in Eastie, but I just got back from outside and measured 9" at Orient Heights. 6.5" seems low, but Logan seems to always be lower than surrounding areas. 

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