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Sunday's Screaming Southeaster


CT Rain

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NAM sounding text for Block Island, RI (06z Monday, 78hr forecast). The sounding diagram doesn't have enough space to show an 93 kt wind barb or hodograph.

Latitude:   41.20
Longitude: -71.23
-------------------------------------------------------------------------------
LEV PRES  HGHT  TEMP  DEWP  RH  DD   WETB DIR SPD THETA THE-V THE-W THE-E   W
     mb     m     C     C    %   C     C  deg knt   K     K     K     K    g/kg
-------------------------------------------------------------------------------
  0 1000  -154                                                                 
SFC  982    -1  18.8  18.2  96  0.6  18.4 137  50 293.4 295.8 292.2 331.8 13.48
  2  950   287  18.4  18.3  99  0.1  18.4 144  80 295.9 298.4 293.4 336.3 14.04
  3  900   751  16.8  16.6  99  0.1  16.7 157  93 298.8 301.2 293.7 337.7 13.36
  4  850  1237  14.2  11.7  85  2.5  12.6 168  92 301.1 302.9 292.0 331.2 10.23
  5  800  1749  14.0   3.1  48 10.9   7.9 182  90 306.1 307.2 290.0 324.3  5.97
  6  750  2290  10.0   0.0  50 10.0   4.8 186  88 307.4 308.4 289.7 323.1  5.11
  7  700  2859   6.4  -0.5  61  6.9   2.8 186  78 309.6 310.6 290.6 325.9  5.27
  8  650  3463   3.2 -13.4  28 16.6  -3.3 190  69 312.6 313.0 288.5 319.4  2.09

 

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6 minutes ago, Chinook said:

NAM sounding text for Block Island, RI (06z Monday, 78hr forecast). The sounding diagram doesn't have enough space to show an 93 kt wind barb or hodograph.


Latitude:   41.20
Longitude: -71.23
-------------------------------------------------------------------------------
LEV PRES  HGHT  TEMP  DEWP  RH  DD   WETB DIR SPD THETA THE-V THE-W THE-E   W
     mb     m     C     C    %   C     C  deg knt   K     K     K     K    g/kg
-------------------------------------------------------------------------------
  0 1000  -154                                                                 
SFC  982    -1  18.8  18.2  96  0.6  18.4 137  50 293.4 295.8 292.2 331.8 13.48
  2  950   287  18.4  18.3  99  0.1  18.4 144  80 295.9 298.4 293.4 336.3 14.04
  3  900   751  16.8  16.6  99  0.1  16.7 157  93 298.8 301.2 293.7 337.7 13.36
  4  850  1237  14.2  11.7  85  2.5  12.6 168  92 301.1 302.9 292.0 331.2 10.23
  5  800  1749  14.0   3.1  48 10.9   7.9 182  90 306.1 307.2 290.0 324.3  5.97
  6  750  2290  10.0   0.0  50 10.0   4.8 186  88 307.4 308.4 289.7 323.1  5.11
  7  700  2859   6.4  -0.5  61  6.9   2.8 186  78 309.6 310.6 290.6 325.9  5.27
  8  650  3463   3.2 -13.4  28 16.6  -3.3 190  69 312.6 313.0 288.5 319.4  2.09

 

Just a bit windy. Shows the potential here if we get one of these stemwinders to bomb out early and tuck in.

The GFS is a snoozefest. 

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The old "EE" rule.  Prefer 2 see that combo at 48 hours out.  Still a ways out.  Good news: Big potential still exists.  Huge question: Will that still be the case 24 hours from now?    



That is the question that needs to be answered, I think models can go either way with the intensity of the low level jet
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This is going to be a fun little forecast, with a lot of moving parts. Not a good rip and read system.

For starters we have a really well defined PV streamer. The GFS (sorry Kevin) has the tropopause pressures below 500 mb, so nothing to scoff at. At the same time we also have 93L being drawn up the coast. But tropical convection is a wildcard for sure.

That being said, these wild rapid cyclogenesis solutions aren't just weenie fodder. Given the right tilt to the upper and lower level PV anomalies, the upper level PV streamer will enhance southerly flow to its east, increasing WAA and moisture transport north. You also have significant latent heat release induced low level PV anomalies thanks to 93L which will induce stronger cyclonic circulation above it. That feeds back to increase the the southerly flow ahead of the PV streamer. More southerly flow means more heat/moisture for convection, and so on. You can see the feedback mechanism going on here with the rapid deepening south of New England.

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At least we may shed the rest of the late foliage with this next one, Nothing i hate more then to have hunting season with trees full of leaves and ground vegetation still thriving.

On my way out the door to sit in a tree. First real day today hopefully the deer move.

Sent from my SM-G955U using Tapatalk

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19 minutes ago, Damage In Tolland said:

Hopefully folks have taken this seriously, and will take the necessary precautions,,and that they weren't fooled by the GFS

Preparations to protect life and property must be rushed to completion. Solid structures may fail beneath a barrage of acorns and rolling pumpkins.

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That's a pretty impressive rain event in the HV on the Euro. Even gets 3" down here in CT. And the gust product was actually the most impressive for this area yet; widespread 60-70 (probably more like 50-60 in reality away from coast) for a brief period Sunday night. With already saturated ground there could def be some problems with uprooted trees if the wind materializes. Too bad the wind comes overnight...

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