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Tropical Storm KIKO


ZCZC MIATCDEP5 ALL
TTAA00 KNHC DDHHMM
TROPICAL STORM KIKO DISCUSSION NUMBER  18
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL   EP152007
200 AM PDT FRI OCT 19 2007
 
A QUIKSCAT OVERPASS BACK AT 0041Z SUGGESTED THAT THE MAXIMUM WINDS
WERE STILL ABOUT 35 KT.  SINCE THAT TIME THE CONVECTIVE PATTERN HAS
BEEN INCONSISTENT...ALTHOUGH THE MOST RECENT FEW IMAGES SHOW A
FAIRLY HEALTHY BURST IN THE SOUTHWESTERN QUADRANT.  DESPITE 06Z
SUBJECTIVE DVORAK ESTIMATES OF 45 KT...THE ADVISORY INTENSITY
REMAINS 35 KT FOR NOW BASED ON THE EARLIER QUIKSCAT DATA...WHICH
WERE ALSO USED TO CONTRACT THE 34-KT WIND RADII.  CONDITIONS APPEAR
RIPE FOR STRENGTHENING...HOWEVER...AS KIKO WILL SOON FIND ITSELF
RIGHT BENEATH AN UPPER-LEVEL ANTICYCLONE AND STILL OVER VERY WARM
WATERS JUST OFF THE PACIFIC COAST OF MEXICO.  AS IN THE PREVIOUS
ADVISORY...THE OFFICIAL FORECAST CALLS FOR KIKO TO BECOME A
HURRICANE IN A COUPLE OF DAYS...WHICH IS A LITTLE ABOVE MOST OF THE
OBJECTIVE GUIDANCE.  THE FORECAST PEAK INTENSITY AT LONGER RANGES
HAS BEEN REDUCED SLIGHTLY IN ACCORDANCE WITH THE GUIDANCE THAT
SEEMS TO RESPOND TO A MODEST INCREASE IN SHEAR AND EVENTUALLY
COOLER SSTS ON DAYS 4 AND 5.
 
CENTER FIXES DERIVED FROM AN ANALYSIS OF THE QUIKSCAT AMBIGUITIES
AND AN SSMIS IMAGE AT 0317Z...COMBINED WITH RECENT GOES INFRARED
IMAGERY...DO NOT REVEAL MUCH MOTION OF THE CIRCULATION CENTER BUT
HINT AT A NORTHWESTWARD DRIFT...AND THE INITIAL MOTION ESTIMATE
REMAINS AN UNCERTAIN 315/3.  THE MODELS GENERALLY FORECAST A
NORTHWESTWARD MOTION ROUGHLY PARALLEL TO THE PACIFIC COAST OF
MEXICO FOR 2-3 DAYS...BUT WITH DIFFERENCES PRIMARILY IN THE FORWARD
SPEED...AS THE CYCLONE HEADS TOWARD A PERSISTENT BREAK IN THE
SUBTROPICAL RIDGE OVER NORTHWESTERN MEXICO AND THE ADJACENT EASTERN
PACIFIC.  BEYOND 72 HOURS...MOST OF THE MODELS FORECAST A TURN
TOWARD THE WEST AS A RIDGE BUILDS TO THE NORTH OF KIKO AS A
DEEP-LAYER CYCLONE PROGRESSES EASTWARD ACROSS THE SOUTHERN UNITED
STATES.  THE LATITUDE AT WHICH THAT TURN OCCURS VARIES WILDLY AMONG
THE MODELS...WITH THE GFDL FARTHEST NORTH NEAR THE SOUTHERN BAJA
CALIFORNIA PENINSULA AND THE GFS ON THE SOUTHERN SIDE OF THE
GUIDANCE ENVELOPE.  THE NEW OFFICIAL FORECAST IS ROUGHLY DOWN THE
MIDDLE OF THE MODEL SOLUTIONS AND JUST A LITTLE FASTER THAN THE
PREVIOUS ADVISORY AT LONG RANGES.
 
 
FORECAST POSITIONS AND MAX WINDS
 
INITIAL      19/0900Z 16.7N 104.9W    35 KT
 12HR VT     19/1800Z 17.0N 105.3W    40 KT
 24HR VT     20/0600Z 17.5N 105.9W    50 KT
 36HR VT     20/1800Z 18.1N 106.6W    55 KT
 48HR VT     21/0600Z 18.7N 107.3W    65 KT
 72HR VT     22/0600Z 20.0N 108.5W    70 KT
 96HR VT     23/0600Z 21.0N 110.5W    70 KT
120HR VT     24/0600Z 21.5N 113.0W    65 KT
 
$$
FORECASTER KNABB
 
NNNN


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Page last modified: Friday, 02-Nov-2007 21:21:06 UTC