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Tropical Storm Henri


wxeyeNH
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12 minutes ago, jbenedet said:

Strangest things tend to happen with significant -NAO blocking which we have. GFS too progressive. Ukie seems like a worst case based on climo.
 

12z Ukie/GFS 50/50 blend seems fair for a baseline case right now IMO.

Good point. Can’t underestimate the NAO block here which is unseasonably strong 

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Watch ... this will be the Euro run that destroys ISP to Keene with 100 mph event entry ending in 20" of stall rains  ... .everyone's mood swarms like yellow-jacket's nest poked with Molly,

    ... only to have all the models then consensus on a track 30 Mi E of ACK -  wah wah wahhhh

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17 minutes ago, jbenedet said:

Strangest things tend to happen with significant -NAO blocking which we have. GFS too progressive. Ukie seems like a worst case based on climo.
 

12z Ukie/GFS 50/50 blend seems fair for a baseline case right now IMO.

Heh... I was just musing to self, "Weird - the 12z NAM solution looks like a blend between the UK/GFS and may be right)

The NAM?!   That's just not allowed man.  That's how we know this thing's doing something that no model has yet depicted - anything to prevent the NAM from being right.

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Interesting so far. Like I was saying earlier, it looked like it was decoupling under the shear but that process stopped on visible. Recon is finding the center deeper within the convection. It'll probably have a strong tilt, but it's not separated from the data we have so far. 

Center is a little weaker than estimates though. Not sure what they'll find deeper within the convection. 

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Center dropsonde. Looks like the pressure is a touch lower than 1000mb. 

Product: Air Force Temp Drop (Dropsonde) Message (UZNT13 KNHC)
Transmitted: 19th day of the month at 17:41Z
Agency: United States Air Force
Aircraft: Lockheed WC-130J Hercules with reg. number AF97-5304
Storm Name: Henri
Storm Number: 08 (flight in the North Atlantic basin)
Mission Number: 1
Observation Number: 07 ( See all messages of this type for this mission. )

Part A...
 

Date: Near the closest hour of 18Z on the 19th day of the month
Highest Mandatory Level For Which Wind Was Reported: 850mb
Coordinates: 29.6N 70.9W
Location: 408 statute miles (657 km) to the WSW (243°) from Hamilton, Bermuda (U.K.).
Marsden Square: 080 ( About )
 
Surface and Standard Isobaric Surfaces
Level Geo. Height Air Temp. Dew Point Wind Direction Wind Speed
1000mb -2m (-7 ft) Other data not available.
925mb 686m (2,251 ft) 22.8°C (73.0°F) 22.3°C (72°F) 360° (from the N) 7 knots (8 mph)
850mb 1,425m (4,675 ft) 22.8°C (73.0°F) About 16°C (61°F) 270° (from the W) 4 knots (5 mph)

Information About Radiosonde:
- Launch Time: 17:31Z
- About Sonde: A descending radiosonde tracked automatically by satellite navigation with no solar or infrared correction.

Remarks Section...
 
Dropsonde Location: Dropped in center.

Highest altitude where wind was reported:
- Location: 29.58N 70.94W
- Time: 17:31:08Z

Lowest altitude where wind was reported:
- Location: 29.58N 70.94W
- Time: 17:33:24Z

Mean Boundary Level Wind (mean wind in the lowest 500 geopotential meters of the sounding):
- Wind Direction: 15° (from the NNE)
- Wind Speed: 8 knots (9 mph)

Deep Layer Mean Wind (average wind over the depth of the sounding):
- Wind Direction: 345° (from the NNW)
- Wind Speed: 7 knots (8 mph)
- Depth of Sounding: From 844mb to 999mb

Average Wind Over Lowest Available 150 geopotential meters (gpm) of the sounding:
- Lowest 150m: 160 gpm - 10 gpm (525 geo. feet - 33 geo. feet)
- Wind Direction: 10° (from the N)
- Wind Speed: 8 knots (9 mph)

Sounding Software Version: AEV 30404
 

Part B: Data for Significant Levels...
 

Significant Temperature And Relative Humidity Levels
Level Air Temperature Dew Point
1000mb (Surface) 27.4°C (81.3°F) 25.2°C (77°F)
924mb 22.6°C (72.7°F) 22.1°C (72°F)
873mb 21.4°C (70.5°F) 18.9°C (66°F)
850mb 22.8°C (73.0°F) About 16°C (61°F)
 
Significant Wind Levels
Level Wind Direction Wind Speed
1000mb (Surface) 5° (from the N) 8 knots (9 mph)
905mb 340° (from the NNW) 7 knots (8 mph)
882mb 310° (from the NW) 11 knots (13 mph)
871mb 315° (from the NW) 12 knots (14 mph)
866mb 320° (from the NW) 10 knots (12 mph)
854mb 285° (from the WNW) 6 knots (7 mph)
844mb 205° (from the SSW) 3 knots (3 mph)
 
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Beautiful out there now ...

That heavy rains pushed off and we're sort of left in this tropical bath with splashes of sun and interesting cloud-scapes.  It's not 'hot' yet, so it's really kind of soothing.  Fred's guts -

In a symbolic way it's kind of like it laid a foundation perhaps -

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