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Tropical Storm Henri


wxeyeNH
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4 minutes ago, CoastalWx said:

We had one in 2019 too. I can't get excited until this thing gets its act together. That's my view. 

I remember that one.  It was the final field day of our sustainability audit and I had to remove a large dead fir from our road to get in on the fun.  When I crouched down to hook the tow strap to the tree, a gust whipped my rain jacket up over my head and the RA+ did its thing.  :(

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3 minutes ago, CoastalWx said:

If this slows near the Cape, big hydro issues just to the west of track. 

Especially with how wet this past week and summer has been. When was the last time we had a TC that had a stall like that wasn't just hauling it to the N/NE?

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Recon turning and heading toward a NE to SW pass. I must say it is more organized than I thought it would be. Winds don't really matter here, it's about how organized the center is and whether there is an inner core. So far, the answer to that seems to be yes, which makes it more likely to quickly reorganize and intensify when shear decreases. 

On this pass it'll also be interesting to see if there's a westward heading of the center or a continued south of due west motion. The latter would imply that it remains deep enough to verify further west. 

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Looks like the pressure is dropping. Here's the latest center dropsonde. 

 

Product: Air Force Temp Drop (Dropsonde) Message (UZNT13 KNHC)
Transmitted: 19th day of the month at 19:20Z
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: 14 ( See all messages of this type for this mission. )

Part A...
 

Date: Near the closest hour of 19Z on the 19th day of the month
Highest Mandatory Level For Which Wind Was Reported: 925mb
Coordinates: 29.6N 71.1W
Location: 419 statute miles (674 km) to the WSW (244°) 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 -20m (-66 ft) This level does not exist in this area of the storm above the surface level.
998mb (29.47 inHg) Surface (Sea Level) 26.6°C (79.9°F) 25.2°C (77°F) 170° (from the S) 18 knots (21 mph)
925mb 667m (2,188 ft) 23.0°C (73.4°F) 22.6°C (73°F) 170° (from the S) 22 knots (25 mph)
850mb 1,408m (4,619 ft) 23.0°C (73.4°F) About 18°C (64°F) No Wind Report Available For This Level

Information About Radiosonde:
- Launch Time: 19:05Z
- About Sonde: A descending radiosonde tracked automatically by satellite navigation with no solar or infrared correction.

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

Lowest altitude where wind was reported:
- Location: 29.64N 71.14W
- Time: 19:07:16Z

Mean Boundary Level Wind (mean wind in the lowest 500 geopotential meters of the sounding):
- Wind Direction: 170° (from the S)
- Wind Speed: 23 knots (26 mph)

Deep Layer Mean Wind (average wind over the depth of the sounding):
- Wind Direction: 180° (from the S)
- Wind Speed: 18 knots (21 mph)
- Depth of Sounding: From 844mb to 997mb

Average Wind Over Lowest Available 150 geopotential meters (gpm) of the sounding:
- Lowest 150m: 155 gpm - 5 gpm (509 geo. feet - 16 geo. feet)
- Wind Direction: 170° (from the S)
- Wind Speed: 21 knots (24 mph)

Sounding Software Version: AEV 30404
 

Part B: Data for Significant Levels...
 

Significant Temperature And Relative Humidity Levels
Level Air Temperature Dew Point
998mb (Surface) 26.6°C (79.9°F) 25.2°C (77°F)
916mb 22.6°C (72.7°F) 22.1°C (72°F)
896mb 24.0°C (75.2°F) 19.1°C (66°F)
850mb 23.0°C (73.4°F) About 18°C (64°F)
 
Significant Wind Levels
Level Wind Direction Wind Speed
998mb (Surface) 170° (from the S) 18 knots (21 mph)
995mb 170° (from the S) 21 knots (24 mph)
947mb 170° (from the S) 24 knots (28 mph)
918mb 170° (from the S) 22 knots (25 mph)
889mb 200° (from the SSW) 18 knots (21 mph)
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4 minutes ago, Pluffmud said:

I noticed that too. That wnw direction hasn’t begun yet. I feel like the later that happens that there would be more west adjustments.

The second recon pass does seem to be a bit north of the first one, though tropical storms don't move in a straight line to it's not enough to determine a trend. First pass had the center at 29.34 n and second at 29.38 n. 

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9 minutes ago, Pluffmud said:

I noticed that too. That wnw direction hasn’t begun yet. I feel like the later that happens that there would be more west adjustments.

Probably, but we may also see a sharper veer to the east than forecast upon approach, which is often the case and could negate some of that.....unless it really gets captured.

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3 minutes ago, 40/70 Benchmark said:

Probably, but we may also see a sharper veer to the east than forecast upon approach, which could negate some of that.....unless it really gets captured.

Or it takes its time turning north, but by then the ULL almost moves it more NE because it does not have enough latitude for the ULL to dig down and tug it to the NNW. 

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6 minutes ago, 40/70 Benchmark said:

Probably, but we may also see a sharper veer to the east than forecast upon approach, which could negate some of that.....unless it really gets captured.

Lol,... I read this recent exchange snickering because 'Nope, doesn't mean you get to have a hurricane'   :)

No but I was thinking it'll end up in the same place, just taking a broader parabolic motion as thought it was a course chosen for greatest regret.  

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