© Greg Nordstrom 2005/2008
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000
WTPZ35
KNHC
180235
TCPEP5
BULLETIN
HURRICANE RICK ADVISORY NUMBER 11
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL EP202009
800 PM PDT SAT OCT 17 2009
...WITH 180 MPH WINDS...RICK BECOMES THE SECOND STRONGEST
EASTERN NORTH PACIFIC HURRICANE ON RECORD AFTER LINDA OF
1997...
INTERESTS IN SOUTHERN BAJA CALIFORNIA AND THE SOUTHWEST
COAST OF MEXICO SHOULD MONITOR THE PROGRESS OF THIS
SEVERE HURRICANE.
AT 800 PM PDT...0300 UTC...THE EYE OF HURRICANE RICK
WAS LOCATED NEAR LATITUDE 15.0 NORTH...LONGITUDE 105.9
WEST OR ABOUT 295 MILES ...475 KM...SOUTH-SOUTHWEST OF
MANZANILLO MEXICO AND ABOUT 605 MILES ...975 KM...
SOUTH-SOUTHEAST OF CABO SAN LUCAS MEXICO.
RICK IS MOVING TOWARD THE WEST-NORTHWEST NEAR 14 MPH...
22 KM/HR... AND THIS MOTION IS EXPECTED TO CONTINUE ON
SUNDAY. A GRADUAL TURN TO THE NORTHWEST AND NORTH SHOULD
BEGIN ON MONDAY.
SATELLITE IMAGES INDICATE THAT RICK HAS CONTINUED TO
STRENGTHEN... AND THE MAXIMUM SUSTAINED WINDS ARE NOW
ESTIMATED NEAR 180 MPH...285 KM/HR...WITH HIGHER GUSTS.
RICK IS AN EXTREMELY DANGEROUS CATEGORY FIVE HURRICANE
ON THE SAFFIR-SIMPSON HURRICANE SCALE. SOME FLUCTUATIONS
IN INTENSITY ARE LIKELY ON SUNDAY.
HURRICANE FORCE WINDS EXTEND OUTWARD UP TO 45 MILES...
75 KM...FROM THE CENTER...AND TROPICAL STORM FORCE WINDS
EXTEND OUTWARD UP TO 155 MILES...250 KM.
ESTIMATED MINIMUM CENTRAL PRESSURE IS 906 MB/26.75 INCHES.
LARGE SWELLS GENERATED BY RICK WILL AFFECT PORTIONS OF THE
SOUTHERN COAST OF MEXICO DURING THE NEXT COUPLE OF DAYS...
CAUSING POTENTIALLY DANGEROUS SURF CONDITIONS.
...SUMMARY OF 800 PM PDT INFORMATION...
LOCATION...15.0N 105.9W
MAXIMUM SUSTAINED WINDS...180 MPH
PRESENT MOVEMENT...WEST-NORTHWEST OR 290 DEGREES AT 14 MPH
MINIMUM CENTRAL PRESSURE...906 MB
THE NEXT ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE
CENTER AT 200 AM PDT.
$$
FORECASTER AVILA
Forecast Discussion:
000
WTPZ45
KNHC 180236
TCDEP5
HURRICANE RICK DISCUSSION NUMBER 11
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL EP202009
800 PM PDT SAT OCT 17 2009
THE SATELLITE PRESENTATION OF HURRICANE RICK CAN BE
EXPRESSED IN ONE WORD...SPECTACULAR. THE EYE IS QUITE
DISTINCT AND IS SURROUNDED BY VERY DEEP CONVECTION.
ON THE LAST AVAILABLE VISIBLE IMAGES ONE COULD SEE THE
SUNLIGHT REFLECTING OFF THE EASTERN SIDE OF THE EYEWALL
AND THE STADIUM EFFECT THAT IS TYPICAL OF INTENSE
HURRICANES. MORE IMPORTANTLY...SUBJECTIVE T-NUMBERS ARE
7.0 AND 7.5 ON THE DVORAK SCALE FROM TAFB AND SAB
RESPECTIVELY...AND THE OBJECTIVE T-NUMBERS HAVE REACHED
7.7 AND A 3-HOUR AVERAGE OF 7.4 DURING THE PAST HOUR OR SO
BASED ON THESE DATA..THE INITIAL INTENSITY HAS BEEN
INCREASED TO 155 KNOTS. THIS MAKES RICK THE SECOND
STRONGEST HURRICANE ON RECORD IN THE EASTERN PACIFIC
AFTER LINDA IN 1997.
THERE IS AN OPPORTUNITY FOR RICK TO GATHER A LITTLE MORE
STRENGTH TONIGHT OR EARLY SUNDAY...BUT MOST LIKELY THE
HURRICANE WILL FLUCTUATE IN INTENSITY DUE TO POSSIBLE
EYEWALL REPLACEMENT CYCLES DURING THE NEXT 12 TO 24
HOURS. THEREAFTER...RICK IS EXPECTED TO SLOWLY WEAKEN AS
THE SHEAR BEGINS TO INCREASE AND THE CYCLONE MOVES OVER
RELATIVELY COOLER WATERS. THIS IS CONSISTENT WITH
GUIDANCE WHICH UNANIMOUSLY INDICATES THAT RICK HAS
ALREADY REACHED...OR IS VERY CLOSE TO ITS PEAK INTENSITY.
RICK CONTINUES RIGHT ON TRACK AND IS MOVING TOWARD THE
WEST-NORTHWEST OR 290 DEGREES AT 12 KNOTS...EMBEDDED
WITHIN THE FLOW SOUTH OF THE SUBTROPICAL HIGH OVER
MEXICO. HOWEVER...IN A DAY OR SO...THE STEERING PATTERN
IS EXPECTED TO CHANGE.. THE SUBTROPICAL HIGH WHICH HAS
BEEN KEEPING RICK ON A WESTWARD COURSE AWAY FROM MEXICO
WILL BE ERODED BY A SHORT WAVE PASSING TO THE NORTH.
THIS NEW STEERING PATTERN SHOULD FORCE RICK TO RECURVE
TOWARD THE NORTH AND NORTHEAST TOWARD SOUTHERN BAJA
CALIFORNIA AND THEN TOWARD MAINLAND MEXICO. WITH THE
EXCEPTION OF THE UK MODEL WHICH KEEPS RICK MOVING
WESTWARD...THE REST OF THE MODELS RESPOND TO THE CHANGE
IN STEERING BY TURNING THE HURRICANE TOWARD THE NORTH
AND NORTHEAST AT DIFFERENT SPEEDS. THE OFFICIAL FORECAST
FOLLOWS THE MODEL TREND AND IS THE MIDDLE OF THE GUIDANCE
ENVELOPE.
THE HURRICANE IS NOT EXPECTED TO BE A CATEGORY FIVE AS IT
APPROACHES BAJA CALIFORNIA BUT IS FORECAST TO BE INTENSE.
INTERESTS ON THE SOUTHWESTERN COAST OF MEXICO AND BAJA
CALIFORNIA SHOULD CLOSELY MONITOR THE PROGRESS OF THIS
EXTREMELY DANGEROUS HURRICANE DURING THE NEXT SEVERAL DAYS
FORECAST POSITIONS AND MAX WINDS
INITIAL 18/0300Z 15.0N 105.9W 155 KT
12HR VT 18/1200Z 15.7N 107.8W 160 KT
24HR VT 19/0000Z 16.6N 110.0W 150 KT
36HR VT 19/1200Z 17.5N 111.5W 140 KT
48HR VT 20/0000Z 18.5N 112.0W 120 KT
72HR VT 21/0000Z 20.5N 111.5W 105 KT
96HR VT 22/0000Z 23.5N 110.0W 80 KT
120HR VT 23/0000Z 27.0N 106.0W 40 KT...INLAND
$$
FORECASTER AVILA