CPAC: DARBY - Post-Tropical

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Re: EPAC: DARBY - Tropical Storm

#41 Postby cycloneye » Wed Jul 13, 2016 10:45 am

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Re: EPAC: DARBY - Tropical Storm

#42 Postby Yellow Evan » Wed Jul 13, 2016 11:39 am

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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Re: EPAC: DARBY - Tropical Storm

#43 Postby 1900hurricane » Wed Jul 13, 2016 12:14 pm

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

#44 Postby Alyono » Wed Jul 13, 2016 12:59 pm

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
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Re: EPAC: DARBY - Tropical Storm

#45 Postby Yellow Evan » Wed Jul 13, 2016 1:34 pm

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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Re: EPAC: DARBY - Tropical Storm

#46 Postby cycloneye » Wed Jul 13, 2016 1:47 pm

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
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Re: EPAC: DARBY - Tropical Storm

#47 Postby Yellow Evan » Wed Jul 13, 2016 1:55 pm

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

#48 Postby Alyono » Wed Jul 13, 2016 1:59 pm

12Z EC also has an intensifying hurricane landfall

It's 8 and a half days out. Landfall chances are statistically low as a result
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Re: EPAC: DARBY - Hurricane

#49 Postby Alyono » Wed Jul 13, 2016 3:39 pm

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
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Re: EPAC: DARBY - Hurricane

#50 Postby cycloneye » Wed Jul 13, 2016 3:40 pm

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
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Re: EPAC: DARBY - Hurricane

#51 Postby cycloneye » Wed Jul 13, 2016 3:49 pm

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Re: EPAC: DARBY - Hurricane

#52 Postby Yellow Evan » Wed Jul 13, 2016 5:16 pm

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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Re: EPAC: DARBY - Hurricane

#53 Postby Kingarabian » Wed Jul 13, 2016 5:22 pm

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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Re: EPAC: DARBY - Hurricane

#54 Postby Alyono » Wed Jul 13, 2016 5:38 pm

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

#55 Postby Alyono » Wed Jul 13, 2016 5:40 pm

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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Re: EPAC: DARBY - Hurricane

#56 Postby Yellow Evan » Wed Jul 13, 2016 6:11 pm

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

#57 Postby Alyono » Wed Jul 13, 2016 8:20 pm

very sheared still. The shear has not decreased

http://www.nrlmry.navy.mil/tc-bin/tc_ho ... egreeticks

classic northeast shear convective pattern
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Re: EPAC: DARBY - Hurricane

#58 Postby Yellow Evan » Wed Jul 13, 2016 8:40 pm

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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

#59 Postby Yellow Evan » Wed Jul 13, 2016 8:41 pm

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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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Re: EPAC: DARBY - Hurricane

#60 Postby gatorcane » Wed Jul 13, 2016 8:50 pm

Saved loop

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