CPAC: DARBY - Post-Tropical
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- cycloneye
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Re: EPAC: DARBY - Tropical Storm
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Re: EPAC: DARBY - Tropical Storm
Probably could have gone 65.
Code: Select all
----- Current Analysis -----
Date : 13 JUL 2016 Time : 153000 UTC
Lat : 15:12:06 N Lon : 112:29:16 W
CI# /Pressure/ Vmax
4.0 / 990.0mb/ 65.0kt
Final T# Adj T# Raw T#
3.9 3.9 3.9
Center Temp : -59.4C Cloud Region Temp : -63.7C
Scene Type : UNIFORM CDO CLOUD REGION
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- 1900hurricane
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Re: EPAC: DARBY - Tropical Storm
I'm wary of dry air. Microwave passes have consistently shown a pronounced wedge of it wrapping just to the west of Darby.


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Re: EPAC: DARBY - Tropical Storm
MU has this and one behind it hitting Hawaii as strong hurricanes.
Not sure this will move straight west though. A long way out so plenty of time to monitor
Not sure this will move straight west though. A long way out so plenty of time to monitor
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- Yellow Evan
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Re: EPAC: DARBY - Tropical Storm
Likely to be declared a hurricane at 21z.
Code: Select all
TXPZ24 KNES 131818
TCSENP
A. 05E (DARBY)
B. 13/1800Z
C. 15.3N
D. 112.8W
E. THREE/GOES-W
F. T4.0/4.0/D1.0/24HRS
G. IR/EIR/VIS/SSMIS
H. REMARKS...EVIDENCE OF MODERATE SHEAR NO LONGER APPARENT IN IR. CURVED
BAND HAS FORMED TO THE SOUTH AND WEST OF THE STORM CENTER. VIS BANDING
WRAPS 1.1 FOR A DT OF 4.0. MET AND PT AGREE. FT IS BASED ON DT.
I. ADDL POSITIONS
13/1202Z 15.2N 111.7W SSMIS
...VELASCO
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- cycloneye
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Re: EPAC: DARBY - Tropical Storm
65 kts.
Location: 15.3°N 113.0°W
Maximum Winds: 65 kt Gusts: N/A
Minimum Central Pressure: 992 mb
Environmental Pressure: 1011 mb
Radius of Circulation: 250 NM
Radius of Maximum Wind: 20 NM
Eye Diameter: N/A
Location: 15.3°N 113.0°W
Maximum Winds: 65 kt Gusts: N/A
Minimum Central Pressure: 992 mb
Environmental Pressure: 1011 mb
Radius of Circulation: 250 NM
Radius of Maximum Wind: 20 NM
Eye Diameter: N/A
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Re: EPAC: DARBY - Tropical Storm
Code: Select all
* EAST PACIFIC SHIPS INTENSITY FORECAST *
* IR SAT DATA AVAILABLE, OHC AVAILABLE *
* DARBY EP052016 07/13/16 18 UTC *
TIME (HR) 0 6 12 18 24 36 48 60 72 84 96 108 120
V (KT) NO LAND 65 68 72 75 80 84 84 85 81 75 68 62 57
V (KT) LAND 65 68 72 75 80 84 84 85 81 75 68 62 57
V (KT) LGEM 65 68 72 75 78 81 79 79 77 71 65 59 53
Storm Type TROP TROP TROP TROP TROP TROP TROP TROP TROP TROP TROP TROP TROP
SHEAR (KT) 13 8 6 9 11 12 9 7 7 3 5 2 12
SHEAR ADJ (KT) 0 0 0 0 0 -1 -2 -6 -2 0 -1 6 0
SHEAR DIR 41 57 16 27 38 45 51 58 359 5 277 249 267
SST (C) 28.2 27.8 27.6 27.8 27.6 26.9 26.7 26.8 26.0 25.5 25.2 24.8 24.3
POT. INT. (KT) 147 143 141 143 141 133 131 132 123 118 115 111 106
200 MB T (C) -52.6 -52.2 -52.2 -52.4 -52.2 -52.0 -52.3 -51.8 -52.3 -52.2 -52.5 -52.2 -52.4
200 MB VXT (C) 0.2 0.3 0.4 0.5 0.5 0.8 0.7 0.5 0.7 0.6 0.6 0.5 0.5
TH_E DEV (C) 7 8 8 8 7 6 6 5 5 5 4 4 3
700-500 MB RH 70 67 65 65 65 66 67 65 60 58 53 54 51
MODEL VTX (KT) 22 23 24 25 27 28 28 29 29 27 26 25 24
850 MB ENV VOR 49 57 61 61 63 64 75 88 79 95 89 95 76
200 MB DIV 38 47 52 45 43 49 28 1 -24 -9 17 4 -17
700-850 TADV -2 0 -1 -1 -3 -4 -2 -4 -4 -1 1 4 3
LAND (KM) 901 940 992 1054 1128 1276 1397 1539 1684 1803 1946 2077 2120
LAT (DEG N) 15.3 15.4 15.5 15.7 15.9 16.1 16.5 16.8 17.0 17.4 17.8 18.3 18.9
LONG(DEG W) 113.0 114.2 115.3 116.6 117.8 120.3 122.4 124.4 126.5 128.5 130.6 132.5 134.6
STM SPEED (KT) 11 11 12 12 12 11 10 10 10 10 10 10 11
HEAT CONTENT 11 8 12 15 17 8 4 2 0 0 0 0 0
FORECAST TRACK FROM OFCI INITIAL HEADING/SPEED (DEG/KT):270/ 10 CX,CY: -9/ 0
T-12 MAX WIND: 60 PRESSURE OF STEERING LEVEL (MB): 566 (MEAN=586)
GOES IR BRIGHTNESS TEMP. STD DEV. 50-200 KM RAD: 8.8 (MEAN=14.5)
% GOES IR PIXELS WITH T < -20 C 50-200 KM RAD: 96.0 (MEAN=65.0)
PRELIM RI PROB (DV .GE. 30 KT IN 24 HR): 20.1
INDIVIDUAL CONTRIBUTIONS TO INTENSITY CHANGE
6 12 18 24 36 48 60 72 84 96 108 120
----------------------------------------------------------
SAMPLE MEAN CHANGE 0. 0. 1. 1. 1. 1. 1. 1. 0. -1. -1. -2.
SST POTENTIAL 1. 1. 2. 3. 2. 1. -1. -3. -5. -6. -8. -9.
VERTICAL SHEAR MAG 0. 0. 0. 0. 1. 1. 2. 4. 5. 6. 7. 6.
VERTICAL SHEAR ADJ 0. 0. 0. 0. 0. 1. 1. 1. 1. 1. 0. 0.
VERTICAL SHEAR DIR 0. 1. 1. 2. 3. 4. 5. 5. 4. 3. 2. 1.
PERSISTENCE 1. 2. 2. 2. 1. 1. 0. 0. 0. 0. 0. 0.
200/250 MB TEMP. 0. 0. 0. -1. -1. -1. -1. 0. 0. 0. -1. -1.
THETA_E EXCESS 0. 0. 1. 1. 1. 1. 0. 0. 0. -1. -1. -2.
700-500 MB RH 0. 0. 0. 0. 0. 1. 1. 1. 1. 0. 0. 0.
MODEL VTX TENDENCY 0. 1. 2. 5. 7. 7. 9. 9. 7. 5. 3. 2.
850 MB ENV VORTICITY 0. 0. 0. 0. 0. -1. -1. -1. -2. -2. -2. -2.
200 MB DIVERGENCE 0. 0. 0. 0. 0. 0. 0. -1. -2. -2. -2. -2.
850-700 T ADVEC 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0.
ZONAL STORM MOTION 0. 0. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1.
STEERING LEVEL PRES 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0.
DAYS FROM CLIM. PEAK 0. 0. 0. 0. 0. 0. 0. 0. -1. -1. -1. -2.
GOES PREDICTORS 1. 2. 2. 3. 3. 3. 3. 3. 2. 2. 2. 2.
OCEAN HEAT CONTENT 0. 0. 0. 0. -1. -1. -1. -1. 0. 0. 0. 0.
----------------------------------------------------------
TOTAL CHANGE 3. 7. 10. 15. 19. 19. 20. 16. 10. 3. -3. -8.
CURRENT MAX WIND (KT): 65. LAT, LON: 15.3 113.0
** 2015 E. Pacific RI INDEX EP052016 DARBY 07/13/16 18 UTC **
(SHIPS-RII PREDICTOR TABLE for 30 KT OR MOREMAXIMUM WIND INCREASE IN NEXT 24-h)
Predictor Value RI Predictor Range Scaled Value(0-1) % Contribution
12 HR PERSISTENCE (KT): 5.0 -22.0 to 38.5 0.45 3.7
POT = MPI-VMAX (KT) : 77.8 40.3 to 144.5 0.36 2.1
HEAT CONTENT (KJ/cm2) : 12.6 0.0 to 75.9 0.17 1.2
STD DEV OF IR BR TEMP : 8.8 38.9 to 2.1 0.82 5.6
850-200 MB SHEAR (KT) : 9.4 18.9 to 1.4 0.55 3.4
MAXIMUM WIND (kt) : 65.0 22.5 to 132.0 0.91 4.8
D200 (10**7s-1) : 45.0 -11.0 to 135.3 0.38 1.2
BL DRY-AIR FLUX (w/m2): 317.6 638.0 to -68.2 0.45 0.0
2nd PC OF IR BR TEMP : 0.5 2.1 to -1.7 0.41 -0.5
% AREA WITH TPW <45 mm: 0.0 81.4 to 0.0 1.00 0.8
SHIPS Prob RI for 20kt/ 12hr RI threshold= 15% is 2.4 times sample mean ( 6.3%)
SHIPS Prob RI for 25kt/ 24hr RI threshold= 30% is 2.3 times sample mean (12.9%)
SHIPS Prob RI for 30kt/ 24hr RI threshold= 22% is 2.6 times sample mean ( 8.6%)
SHIPS Prob RI for 35kt/ 24hr RI threshold= 17% is 2.7 times sample mean ( 5.8%)
SHIPS Prob RI for 40kt/ 24hr RI threshold= 15% is 4.0 times sample mean ( 4.1%)
SHIPS Prob RI for 45kt/ 36hr RI threshold= 16% is 2.3 times sample mean ( 7.1%)
SHIPS Prob RI for 55kt/ 48hr RI threshold= 11% is 1.9 times sample mean ( 5.9%)
Matrix of RI probabilities
---------------------------------------------------------------------
RI (kt / h) | 20/12 | 25/24 | 30/24 | 35/24 | 40/24 | 45/36 | 55/48
---------------------------------------------------------------------
SHIPS-RII: 15.3% 29.8% 22.3% 17.4% 14.6% 16.3% 11.0%
Logistic: 3.5% 12.5% 5.2% 3.2% 1.8% 1.7% 0.7%
Bayesian: 1.2% 7.2% 2.8% 1.0% 0.3% 0.5% 0.0%
Consensus: 6.7% 16.5% 10.1% 7.2% 5.6% 6.2% 3.9%
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Re: EPAC: DARBY - Tropical Storm
12Z EC also has an intensifying hurricane landfall
It's 8 and a half days out. Landfall chances are statistically low as a result
It's 8 and a half days out. Landfall chances are statistically low as a result
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Re: EPAC: DARBY - Hurricane
NHC appears to be overdoing the weakening in the long range.
When BOTH the EC and MU have a hurricane, chances are this will be a hurricane, regardless as to what SHIPS says.
Given the shear profiles, this is a lead pipe cinch to be an annular hurricane
When BOTH the EC and MU have a hurricane, chances are this will be a hurricane, regardless as to what SHIPS says.
Given the shear profiles, this is a lead pipe cinch to be an annular hurricane
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- cycloneye
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Re: EPAC: DARBY - Hurricane
HURRICANE DARBY DISCUSSION NUMBER 9
NWS NATIONAL HURRICANE CENTER MIAMI FL EP052016
300 PM MDT WED JUL 13 2016
Darby is taking on a different shape as the vertical shear gradually
decreases. Convective bursts with overshooting tops have been
occurring near the center, and a broken band of convection wraps
around the southern and western part of the circulation. Subjective
and objective Dvorak estimates are unanimously T4.0, and Darby is
therefore being upgraded to a 65-kt hurricane. Ocean temperatures
near Darby are between 28-29 degrees Celsius, and even though SSTs
decrease some out ahead of the hurricane, microwave data suggest
that the ocean is warming up after the passages of Blas and Celia.
Vertical shear is also expected to be low during the next few days,
and Darby should continue strengthening for the next 36-48 hours.
The NHC intensity forecast is not too different from the previous
forecast, and it is near or just above the upper bound of the
intensity guidance.
The latest fixes indicate that Darby is beginning to gain latitude
again, and the 12-hour average motion is 270/10 kt. Mid-level
ridging to the north of the hurricane is expected to change very
little over the next five days, and Darby should therefore maintain
a consistent westward track through the forecast period. The track
guidance has shifted a little to the north on this cycle, and there
is very little cross-track difference noted among the models.
However, there are some along-track speed differences, with the
ECMWF showing a faster motion due to a stronger depiction of the
mid-level ridge. The updated NHC track forecast has been nudged
northward and is a little faster than the previous forecast, lying
close to a consensus of the GFS and ECMWF.
FORECAST POSITIONS AND MAX WINDS
INIT 13/2100Z 15.4N 113.6W 65 KT 75 MPH
12H 14/0600Z 15.6N 115.3W 75 KT 85 MPH
24H 14/1800Z 16.0N 117.8W 85 KT 100 MPH
36H 15/0600Z 16.4N 120.3W 90 KT 105 MPH
48H 15/1800Z 16.8N 122.7W 90 KT 105 MPH
72H 16/1800Z 17.3N 126.7W 75 KT 85 MPH
96H 17/1800Z 17.8N 130.7W 65 KT 75 MPH
120H 18/1800Z 18.5N 135.0W 55 KT 65 MPH
$$
Forecaster Berg
NWS NATIONAL HURRICANE CENTER MIAMI FL EP052016
300 PM MDT WED JUL 13 2016
Darby is taking on a different shape as the vertical shear gradually
decreases. Convective bursts with overshooting tops have been
occurring near the center, and a broken band of convection wraps
around the southern and western part of the circulation. Subjective
and objective Dvorak estimates are unanimously T4.0, and Darby is
therefore being upgraded to a 65-kt hurricane. Ocean temperatures
near Darby are between 28-29 degrees Celsius, and even though SSTs
decrease some out ahead of the hurricane, microwave data suggest
that the ocean is warming up after the passages of Blas and Celia.
Vertical shear is also expected to be low during the next few days,
and Darby should continue strengthening for the next 36-48 hours.
The NHC intensity forecast is not too different from the previous
forecast, and it is near or just above the upper bound of the
intensity guidance.
The latest fixes indicate that Darby is beginning to gain latitude
again, and the 12-hour average motion is 270/10 kt. Mid-level
ridging to the north of the hurricane is expected to change very
little over the next five days, and Darby should therefore maintain
a consistent westward track through the forecast period. The track
guidance has shifted a little to the north on this cycle, and there
is very little cross-track difference noted among the models.
However, there are some along-track speed differences, with the
ECMWF showing a faster motion due to a stronger depiction of the
mid-level ridge. The updated NHC track forecast has been nudged
northward and is a little faster than the previous forecast, lying
close to a consensus of the GFS and ECMWF.
FORECAST POSITIONS AND MAX WINDS
INIT 13/2100Z 15.4N 113.6W 65 KT 75 MPH
12H 14/0600Z 15.6N 115.3W 75 KT 85 MPH
24H 14/1800Z 16.0N 117.8W 85 KT 100 MPH
36H 15/0600Z 16.4N 120.3W 90 KT 105 MPH
48H 15/1800Z 16.8N 122.7W 90 KT 105 MPH
72H 16/1800Z 17.3N 126.7W 75 KT 85 MPH
96H 17/1800Z 17.8N 130.7W 65 KT 75 MPH
120H 18/1800Z 18.5N 135.0W 55 KT 65 MPH
$$
Forecaster Berg
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- cycloneye
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Re: EPAC: DARBY - Hurricane
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- Yellow Evan
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Re: EPAC: DARBY - Hurricane
Alyono wrote:NHC appears to be overdoing the weakening in the long range.
When BOTH the EC and MU have a hurricane, chances are this will be a hurricane, regardless as to what SHIPS says.
Given the shear profiles, this is a lead pipe cinch to be an annular hurricane
The ECMWF/GFS are known to weaken these sort of EPAC hurricanes too slowly though.
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- Kingarabian
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Re: EPAC: DARBY - Hurricane
Yellow Evan wrote:Alyono wrote:NHC appears to be overdoing the weakening in the long range.
When BOTH the EC and MU have a hurricane, chances are this will be a hurricane, regardless as to what SHIPS says.
Given the shear profiles, this is a lead pipe cinch to be an annular hurricane
The ECMWF/GFS are known to weaken these sort of EPAC hurricanes too slowly though.
The main hurricane killer near Hawaii is shear - which surprisingly is non existent.
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RIP Kobe Bryant
Re: EPAC: DARBY - Hurricane
MU a LOT weaker this run. Has 997mb approaching the islands, which to me is more realistic. Waiting for the final few panels to see if it intensifies as it moves through like on the 12Z
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Re: EPAC: DARBY - Hurricane
my suspicion is this becomes an annular cat 2. We SHOULDN'T see something as strong as Iselle. Think this will hit the cold waters a bit too soon
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- Yellow Evan
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Re: EPAC: DARBY - Hurricane
Code: Select all
----- Current Analysis -----
Date : 13 JUL 2016 Time : 220000 UTC
Lat : 15:25:34 N Lon : 113:47:31 W
CI# /Pressure/ Vmax
4.3 / 984.9mb/ 72.2kt
Final T# Adj T# Raw T#
4.3 4.3 3.9
Center Temp : -59.8C Cloud Region Temp : -64.9C
Scene Type : UNIFORM CDO CLOUD REGION w/ MW EYE
Positioning Method : FORECAST INTERPOLATION
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Re: EPAC: DARBY - Hurricane
very sheared still. The shear has not decreased
http://www.nrlmry.navy.mil/tc-bin/tc_ho ... egreeticks
classic northeast shear convective pattern
http://www.nrlmry.navy.mil/tc-bin/tc_ho ... egreeticks
classic northeast shear convective pattern
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- Yellow Evan
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Re: EPAC: DARBY - Hurricane
Code: Select all
EP, 05, 201607140000, 10, DVTS, CI, , 1570N, 11380W, , 3, 65, 2, 987, 2, DVRK, , , , , , , , , , , , , , E, TAFB, EC, VI, 5, 4040 /////, , , GOES15, CSC, T,
Code: Select all
EP, 05, 201607140000, 10, DVTS, CI, , 1550N, 11400W, , 2, 65, 2, , , , , , , , , , , , , , , , , E, SAB, AS, VIM, 3, 4040 /////, , , GOES15, LLCC, T, COR DT=4.5 BO EMB MET=4.0 PT=4.0 FTBO MET
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- Yellow Evan
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Re: EPAC: DARBY - Hurricane
Code: Select all
EP, 05, 2016071400, , BEST, 0, 155N, 1140W, 70, 989, HU, 64, NEQ, 20, 15, 15, 20, 1011, 250, 15, 0, 0, E, 0, , 0, 0, DARBY, D, 0, , 0, 0, 0, 0, genesis-num, 011,
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