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EPAC Tropical Action 2011


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Not the weak little remnant low, I think the 500 mb low becomes caught up in the trough. 24 hour time steps and continent wide small maps make it tricky to be sure...

There is a moisture fetch from it in the Euro (not unlike what we see in the Atlantic late in the season), but no part of the circulation gets entrained.

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Not bothering with the GFDL and SHIPS is fairly 'meh'.

556   

WHXX01 KMIA 171219  

CHGE77  

TROPICAL CYCLONE GUIDANCE MESSAGE  

NWS NATIONAL HURRICANE CENTER MIAMI FL  

1219 UTC THU NOV 17 2011  



DISCLAIMER...NUMERICAL MODELS ARE SUBJECT TO LARGE ERRORS.  

PLEASE REFER TO NHC OFFICIAL FORECASTS FOR TROPICAL CYCLONE  

AND SUBTROPICAL CYCLONE INFORMATION.  



EAST PACIFIC OBJECTIVE AIDS FOR  



DISTURBANCE INVEST (EP902011) 20111117 1200 UTC  



       ...00 HRS...   ...12 HRS...   ...24 HRS. ..   ...36 HRS...  

       111117  1200   111118  0000   111118  1200   111119  0000  



        LAT    LON     LAT    LON     LAT    LON     LAT    LON  

BAMS     9.1N  94.0W    9.1N  95.5W    9.1N  97.5W    9.4N  99.6W  

BAMD     9.1N  94.0W    9.4N  96.3W    9.9N  98.8W   10.3N 101.3W  

BAMM     9.1N  94.0W    9.3N  95.6W    9.7N  97.6W   10.2N  99.6W  

LBAR     9.1N  94.0W    9.6N  95.9W   10.5N  97.7W   11.4N  99.3W  

SHIP        20KTS          22KTS          26KTS          30KTS  

DSHP        20KTS          22KTS          26KTS          30KTS  



       ...48 HRS...   ...72 HRS...   ...96 HRS. ..   ..120 HRS...  

       111119  1200   111120  1200   111121  1200   111122  1200  



        LAT    LON     LAT    LON     LAT    LON     LAT    LON  

BAMS     9.7N 101.7W   10.5N 106.3W   11.1N 111.6W   10.4N 116.5W  

BAMD    10.6N 103.6W   11.0N 108.8W   11.9N 114.3W   11.5N 118.5W  

BAMM    10.7N 101.5W   11.4N 105.7W   12.5N 111.0W   12.6N 115.5W  

LBAR    12.2N 100.6W   13.6N 104.0W   14.4N 108.2W   13.0N 112.3W  

SHIP        32KTS          40KTS          43KTS          48KTS  

DSHP        32KTS          40KTS          43KTS          48KTS  



        ...INITIAL CONDITIONS...  

LATCUR =   9.1N LONCUR =  94.0W DIRCUR = 270DEG SPDCUR =   9KT  

LATM12 =   9.0N LONM12 =  92.2W DIRM12 = 273DEG SPDM12 =   9KT  

LATM24 =   9.0N LONM24 =  90.4W  

WNDCUR =   20KT RMAXWD =  100NM WNDM12 =   20KT  

CENPRS = 1009MB OUTPRS = 1012MB OUTRAD =  225NM SDEPTH =   S  

RD34NE =    0NM RD34SE =    0NM RD34SW =    0NM RD34NW =   0NM  



$$  

NNNN  

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:scooter:

BULLETIN

TROPICAL DEPRESSION THIRTEEN-E ADVISORY NUMBER 1

NWS NATIONAL HURRICANE CENTER MIAMI FL EP132011

100 PM PST SAT NOV 19 2011

...RARE MID-NOVEMBER TROPICAL DEPRESSION FORMS IN THE EASTERN

PACIFIC...

SUMMARY OF 100 PM PST...2100 UTC...INFORMATION

----------------------------------------------

LOCATION...10.0N 101.0W

ABOUT 480 MI...775 KM S OF ACAPULCO MEXICO

MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H

PRESENT MOVEMENT...W OR 280 DEGREES AT 12 MPH...19 KM/H

MINIMUM CENTRAL PRESSURE...1006 MB...29.71 INCHES

THE THERMODYNAMIC ENVIRONMENT NEAR THE DEPRESSION MAY NOT BE IDEAL

FOR CONVECTIVE DEVELOPMENT SINCE THE SYSTEM MOVED OVER COOL WATERS

AND THROUGH A REGION OF DRY AIR RESULTING FROM A GAP WIND EVENT

OVER THE GULF OF TEHUANTEPEC. HOWEVER...THE SYSTEM IS MOVING

TOWARDS A MORE CONDUCIVE ENVIRONMENT...AND DEEP CONVECTION SHOULD

BEGIN TO SLOWLY FILL IN OVER THE CIRCULATION. VERTICAL SHEAR IS

EXPECTED TO BE RELATIVELY LIGHT THROUGH THE FORECAST PERIOD...SO

STEADY STRENGTHENING IS EXPECTED. THERE IS SOME DIVERGENCE BETWEEN

THE SHIPS AND LGEM GUIDANCE BEYOND 24 HOURS...WITH THE SHIPS

SHOWING MORE AGGRESSIVE INTENSIFICATION. GIVEN THE UNCERTAINTY IN

HOW MUCH THE THERMODYNAMIC ENVIRONMENT WILL IMPROVE...THE OFFICIAL

INTENSITY FORECAST LIES CLOSER TO THE LGEM MODEL.

BASED ON HISTORICAL RECORDS...TROPICAL DEPRESSION THIRTEEN-E IS THE

LATEST-FORMING TROPICAL CYCLONE IN THE EASTERN NORTH PACIFIC BASIN

SINCE TROPICAL DEPRESSION TWENTY-TWO-E IN 1987...WHICH FORMED ON

NOVEMBER 24. IF IT BECOMES A TROPICAL STORM...IT WOULD BE THE

LATEST-FORMING NAMED STORM SINCE HURRICANE WINNIE IN 1983...WHICH

FORMED ON DECEMBER 4.

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FIRST-LIGHT VISIBLE IMAGERY SHOWED THE CENTER FARTHER NORTH THAN

PREVIOUSLY ESTIMATED...AND A LONGER-TERM AVERAGE OF CENTER FIXES

YIELDS A MOTION OF 290/10. IT IS UNCLEAR AS TO WHETHER THE NEW

LONGER-TERM MOTION REPRESENTS A REFORMATION OF THE CENTER OR A

CHANGE OF HEADING. THE CYCLONE SHOULD MOVE ON GENERAL WESTWARD TO

WEST-NORTHWESTWARD HEADING FOR THE NEXT 3 DAYS UNDER THE WESTERN

EXTENSION OF MID-LEVEL RIDGING EXTENDING WEST-SOUTHWESTWARD FROM

THE GULF OF MEXICO. THE FORECAST TRACK BEYOND THIS TIME WILL

LARGELY HINGE ON THE POTENCY OF A SHORTWAVE TROUGH MOVING THROUGH

THE MID-LATITUDE EASTERN PACIFIC AND THE VERTICAL DEPTH/STRENGTH OF

THE CYCLONE. THE GFS SHOWS A STRONGER AND DEEPER CYCLONE TURNING

NORTHWESTWARD IN RESPONSE TO THE PASSAGE OF THIS FEATURE AND THE

SUBSEQUENT EROSION OF THE SUBTROPICAL RIDGE. THE ECMWF/UKMET

SOLUTIONS DEPICT A WEAKER SYSTEM BEING STEERED GENERALLY WESTWARD

IN THE LOW-LEVEL FLOW. GIVEN THE EXPECTATION THAT KENNETH WILL BE

WEAKENING LATE IN THE PERIOD...THE OFFICIAL FORECAST CONTINUES TO

LEAN ON THE ECMWF/UKMET SOLUTIONS AND IS ADJUSTED NORTHWARD DUE TO

THE CENTER RELOCATION.

KENNETH BECOMES THE LATEST-FORMING NAMED STORM IN THE EASTERN NORTH

PACIFIC SINCE HURRICANE WINNIE FORMED ON 4 DECEMBER 1983.

post-138-0-46592800-1321831782.jpg

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BULLETIN

HURRICANE KENNETH ADVISORY NUMBER 8

NWS NATIONAL HURRICANE CENTER MIAMI FL EP132011

700 AM PST MON NOV 21 2011

...KENNETH BECOMES A RARE LATE-SEASON HURRICANE...

SUMMARY OF 700 AM PST...1500 UTC...INFORMATION

----------------------------------------------

LOCATION...12.7N 109.6W

ABOUT 705 MI...1135 KM S OF THE SOUTHERN TIP OF BAJA CALIFORNIA

MAXIMUM SUSTAINED WINDS...80 MPH...130 KM/H

PRESENT MOVEMENT...WNW OR 285 DEGREES AT 14 MPH...22 KM/H

MINIMUM CENTRAL PRESSURE...989 MB...29.21 INCHES

post-32-0-96384400-1321888700.jpg

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