TROPICAL STORM IRENE
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TROPICAL STORM IRENE

Postby b_a88 on Thu Aug 04, 2005 6:32 pm

Tropical Depression NINE

TROPICAL DEPRESSION NINE ADVISORY NUMBER 1
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
5 PM AST THU AUG 04 2005

...AND YET ANOTHER TROPICAL DEPRESSION IN THE ATLANTIC...

AT 5 PM AST...2100Z...THE POORLY DEFINED CENTER OF NEWLY FORMED
TROPICAL DEPRESSION NINE WAS LOCATED NEAR LATITUDE 12.7 NORTH...
LONGITUDE 34.5 WEST OR ABOUT 695 MILES...1115 KM...WEST OF THE
SOUTHERNMOST CAPE VERDE ISLANDS.

THE DEPRESSION IS MOVING TOWARD THE WEST NEAR 12 MPH...19 KM/HR.
THIS GENERAL MOTION IS EXPECTED TO CONTINUE DURING THE NEXT 24
HOURS.

MAXIMUM SUSTAINED WINDS ARE NEAR 30 MPH... 45 KM/HR...WITH HIGHER
GUSTS. SOME STRENGTHENING IS POSSIBLE DURING THE NEXT 24 HOURS.

ESTIMATED MINIMUM CENTRAL PRESSURE IS 1009 MB...29.80 INCHES.

REPEATING THE 5 PM AST POSITION...12.7 N... 34.5 W. MOVEMENT
TOWARD...WEST NEAR 12 MPH. MAXIMUM SUSTAINED WINDS... 30 MPH.
MINIMUM CENTRAL PRESSURE...1009 MB.

THE NEXT ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE CENTER AT
11 PM AST.

<a href="http://www.nhc.noaa.gov/storm_graphics/AT09/refresh/AL0905W+gif/204616W_sm.gif" target="_blank"><img src="http://www.nhc.noaa.gov/storm_graphics/AT09/refresh/AL0905W_sm2+gif/204616W_sm.gif"/></a>
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Postby b_a88 on Fri Aug 05, 2005 1:01 am

TROPICAL DEPRESSION NINE ADVISORY NUMBER 2
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
11 PM AST THU AUG 04 2005

...TROPICAL DEPRESSION NINE MOVING ACROSS THE OPEN TROPICAL ATLANTIC
WITH LITTLE CHANGE IN STRENGTH...

AT 11 PM AST...0300Z...THE POORLY-DEFINED CENTER OF TROPICAL
DEPRESSION NINE WAS LOCATED NEAR LATITUDE 13.0 NORTH...LONGITUDE
35.2 WEST OR ABOUT 735 MILES...1185 KM...WEST OF THE SOUTHERNMOST
CAPE VERDE ISLANDS.

THE DEPRESSION IS MOVING TOWARD THE WEST NEAR 13 MPH...20 KM/HR...
AND THIS GENERAL MOTION IS EXPECTED TO CONTINUE FOR THE NEXT 24
HOURS.

MAXIMUM SUSTAINED WINDS ARE NEAR 30 MPH... 45 KM/HR...WITH HIGHER
GUSTS. SOME STRENGTHENING IS FORECAST DURING THE NEXT 24 HOURS.

ESTIMATED MINIMUM CENTRAL PRESSURE IS 1009 MB...29.80 INCHES.

REPEATING THE 11 PM AST POSITION...13.0 N... 35.2 W. MOVEMENT
TOWARD...WEST NEAR 13 MPH. MAXIMUM SUSTAINED
WINDS... 30 MPH. MINIMUM CENTRAL PRESSURE...1009 MB.

THE NEXT ADVISORY WILL BE ISSUED BY THE NATIONAL
HURRICANE CENTER AT 5 AM AST.

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Postby b_a88 on Fri Aug 05, 2005 5:05 am

Significant strengthening is expect after 72 hours when it moves to a more development friendly area and it is possible at this point that other weather systems could drive it close to the US but that is far off and nothing is certain at this early point in the systems life.
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Postby b_a88 on Fri Aug 05, 2005 10:41 am

TROPICAL DEPRESSION NINE ADVISORY NUMBER 4
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
11 AM AST FRI AUG 05 2005

...TROPICAL DEPRESSION LOST ITS PUNCH...STRENGTHENING IS NOT
ANTICIPATED TODAY OR SATURDAY...

AT 11 AM AST...1500Z...THE POORLY DEFINED CENTER OF TROPICAL
DEPRESSION NINE WAS LOCATED NEAR LATITUDE 16.4 NORTH...LONGITUDE
37.3 WEST OR ABOUT 865 MILES...1395 KM...WEST OF THE SOUTHERNMOST
CAPE VERDE ISLANDS.

THE DEPRESSION IS MOVING TOWARD THE NORTHWEST NEAR 18 MPH ...30
KM/HR...AND THIS MOTION IS EXPECTED TO CONTINUE TODAY WITH A GRADUAL
DECREASE IN FORWARD SPEED THEREAFTER.

MAXIMUM SUSTAINED WINDS ARE NEAR 30 MPH... 45 KM/HR...WITH HIGHER
GUSTS. LITTLE CHANGE IN STRENGTH IS FORECAST DURING THE NEXT 24
HOURS.

ESTIMATED MINIMUM CENTRAL PRESSURE IS 1010 MB...29.83 INCHES.

REPEATING THE 11 AM AST POSITION...16.4 N... 37.3 W. MOVEMENT
TOWARD...NORTHWEST NEAR 18 MPH. MAXIMUM SUSTAINED WINDS... 30 MPH.
MINIMUM CENTRAL PRESSURE...1010 MB.

THE NEXT ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE CENTER AT
5 PM AST.


TROPICAL DEPRESSION NINE DISCUSSION NUMBER 4
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
11 AM EDT FRI AUG 05 2005

HOW LITTLE WE KNOW ABOUT THE GENESIS OF TROPICAL CYCLONES. SATELLITE
IMAGES DURING THE DAY YESTERDAY SHOWED A DISTINCT DISTURBANCE IN THE
DEEP TROPICS WITH ALL KNOWN FACTORS APPARENTLY FAVORABLE FOR THE
SYSTEM TO BECOME A TROPICAL STORM. SURPRISINGLY THIS
MORNING...VISIBLE IMAGES INDICATE THAT THE SYSTEM HAS BECOME
DISORGANIZED. UNEXPECTEDLY...THE LOW-LEVEL CIRCULATION MOVED
NORTHWESTWARD TOWARD RELATIVELY COOLER WATERS AND LOST MOST OF THE
DEEP CONVECTION. HOWEVER...THE SYSTEM STILL MAINTAINS A LARGE AND
VIGOROUS ENVELOPE WITH AT LEAST 25 KNOTS. IT IS INTERESTING TO
NOTE THAT THE LAST FEW GFS RUNS WERE DEVELOPING A TROPICAL CYCLONE
FROM THIS SYSTEM AND MOVED IT WESTWARD THROUGH THE ATLANTIC.
HOWEVER...IN THE LATEST 6Z GFS RUN...THERE IS NO TROPICAL CYCLONE
DEVELOPMENT. THE GFDL...LIKE THE GFS...ALSO CHANGED ITS TUNE AT 6Z
AND NOW EVEN SHOWS DISSIPATION IN 48 HOURS.

GIVEN THESE DRASTIC CHANGES SEEN IN GFS...THE OFFICIAL FORECAST ALSO
MAKES A DRASTIC CHANGE IN BOTH TRACK AND INTENSITY. THE SYSTEM IS
NOW KEPT AS A 25-KNOT TROPICAL DEPRESSION FOR A COUPLE OF DAYS.
THEREAFTER...A MODEST DEVELOPMENT IS ANTICIPATED WHEN THE CYCLONE
REACHES WARMER WATERS...IF IT SURVIVES. THE OFFICIAL FORECAST HAS
BEEN SHIFTED SUBSTANTIALLY NORTHWARD FROM THE PREVIOUS ADVISORY.

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Postby b_a88 on Sat Aug 06, 2005 1:58 am

TROPICAL DEPRESSION NINE ADVISORY NUMBER 6
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
11 PM AST FRI AUG 05 2005

...POORLY ORGANIZED TROPICAL DEPRESSION MOVING WEST-NORTHWESTWARD
ACROSS THE TROPICAL ATLANTIC...

AT 11 PM AST...0300Z...THE CENTER OF TROPICAL DEPRESSION NINE WAS
LOCATED NEAR LATITUDE 17.6 NORTH...LONGITUDE 40.6 WEST OR ABOUT
1090 MILES...1755 KM...WEST-NORTHWEST OF THE SOUTHERNMOST CAPE
VERDE ISLANDS.

THE DEPRESSION IS MOVING TOWARD THE WEST-NORTHWEST NEAR 20 MPH
...32 KM/HR...AND GENERAL THIS MOTION IS EXPECTED TO CONTINUE WITH A
DECREASE IN FORWARD SPEED ON SATURDAY.

MAXIMUM SUSTAINED WINDS ARE NEAR 30 MPH... 45 KM/HR...WITH HIGHER
GUSTS. SATELLITE IMAGERY INDICATES THAT THERE IS MINIMAL
THUNDERSTORM ACTIVITY ASSOCIATED WITH THE DEPRESSION AT THIS
TIME...AND LITTLE CHANGE IN STRENGTH IS FORECAST DURING THE NEXT 24
HOURS.

ESTIMATED MINIMUM CENTRAL PRESSURE IS 1010 MB...29.83 INCHES.

REPEATING THE 11 PM AST POSITION...17.6 N... 40.6 W. MOVEMENT
TOWARD...WEST-NORTHWEST NEAR 20 MPH. MAXIMUM SUSTAINED
WINDS... 30 MPH. MINIMUM CENTRAL PRESSURE...1010 MB.

THE NEXT ADVISORY WILL BE ISSUED BY THE NATIONAL
HURRICANE CENTER AT 5 AM AST.

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It's looking that it will be a while if this is going to strengthen and it is very probable it will not but if it can get through the next few days or so with out falling completely apart it may have a chance to strengthen.
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Postby b_a88 on Sat Aug 06, 2005 8:15 am

TROPICAL DEPRESSION NINE DISCUSSION NUMBER 7
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
5 AM EDT SAT AUG 06 2005

TD-9 REMAINS A LARGE AND WELL-DEFINED CIRCULATION...AND THE INNER
CORE WIND FIELD HAS ACTUALLY IMPROVED CONSIDERABLY SINCE THIS TIME
YESTERDAY WITH NO MULTIPLE CIRCULATIONS APPARENT IN NIGHTIME
VISIBLE IMAGERY. THE INTENSITY IS BEING INCREASED TO 30 KT BASED ON
THE TIGHTER INNER CIRCULATION...TWO CONSECUTIVE QUIKSCAT OVERPASSES
INDICATING NUMEROUS 30-KT UNFLAGGED WIND VECTORS IN THE NORTHEAST
QUADRANT...AND A CIMSS AMSU PRESSURE ESTIMATE OF 1006.5MB ...EQUAL
TO ABOUT 33 KT. CONVECTION HAS BEEN RECENTLY BEEN TRYING TO DEVELOP
INTO A CURVED BAND IN THE EASTERN SEMICIRCLE ABOUT 120 NMI AWAY
FROM THE CENTER...WHICH FURTHER SUGGEST IMPROVED ORGANIZATION.

THE INITIAL MOTION IS 285/13. THE DEPRESSION HAS SLOWED AND TURNED
MORE WESTWARD NOW THAT THE CYCLONE HAS MOVED WEST OF AN UPPER-LEVEL
TROUGH LOCATED TO THE NORTH. THE FORECAST TRACK IS PROBLEMATIC IN
THAT IT IS DIRECTLY RELATED TO THE INTENSITY...AND THEREFORE...THE
VERTICAL DEPTH OF CYCLONE. UPPER-LEVEL WESTERLY WINDS ARE EXPECTED
TO CONTINUE ACROSS THE SYSTEM FOR AT LEAST THE NEXT 36-48 HOURS.
THESE UNFAVORABLE SHEAR CONDITIONS COMBINED WITH AN ABUNDANCE OF
MID-LEVEL DRY AIR SHOULD KEEP CONVECTIVE ORGANIZATION AND VERTICAL
DEVELOPMENT OF THE CYCLONE TO A MINIMUM DURING THAT TIME. THIS
SHOULD ALLOW THE SYSTEM TO BE STEERED MORE WESTWARD BY THE
LOW-LEVEL FLOW. BY 72 HOURS...THE CYCLONE WILL BE OVER WARMER WATER
AND MORE STEADY INTENSIFICATION AND DEEPENING OF THE VERTICAL
CIRCULATION SHOULD OCCUR...WHICH SHOULD ALLOW THE CYCLONE TO BE
STEERED SLOWLY NORTHWESTWARD BY THE DEEP-LAYER FLOW TOWARD AN
EXPECTED WEAKNESS IN THE SUBTROPICAL RIDGE BETWEEN 55W-60W
LONGITUDE. HOWEVER...IF THE STORM MOVES MORE WESTWARD AND STAYS
BELOW 20N LATITUDE THROUGH 72 HOURS...THEN IT MAY NEVER FEEL THE
WEAKNESS IN THE RIDGE AND NOT TURN NORTHWESTWARD. SINCE THE GLOBAL
MODELS ARE ALREADY TOO FAR TO THE NORTH OR RIGHT OF THE CURRENT
POSITION AND MOTION...THE OFFICIAL TRACK WAS SHIFTED TO THE LEFT OF
THE PREVIOUS FORECAST TRACK AND IS CLOSE TO THE NHC MODEL CONSENSUS
THROUGH 72 HOURS AND THEN A LITTLE LEFT OF THE CONSENSUS AFTER
THAT...BUT NOT NEARLY AS FAR LEFT OR SOUTH AS THE UKMET MODEL.

THE PREVIOUSLY MENTIONED INHIBITING FACTORS ARE NOT EXPECTED TO
ABATE FOR AT LEAST 48 HOURS. THE OFFICIAL INTENSITY FORECAST IS
SIMILAR TO THE SHIPS MODEL THROUGH 72 HOURS AND THEN SLIGHTLY
HIGHER AFTER THAT SINCE THE FORECAST TRACK IS FARTHER SOUTH IN A
LOWER SHEAR ENVIRONMENT THAN WHAT THE SHIPS MODEL USED. HOWEVER...
IF THE ACTUAL FORECAST ENDS UP BEING FARTHER SOUTH...THEN WARMER
WATER AND EVEN LESS VERTICAL SHEAR WOULD ALLOW FOR MORE
STRENGTHENING THAN CURRENTLY INDICATED.

FORECASTER STEWART

FORECAST POSITIONS AND MAX WINDS

INITIAL 06/0900Z 17.7N 41.7W 30 KT
12HR VT 06/1800Z 18.2N 43.8W 30 KT
24HR VT 07/0600Z 18.8N 46.4W 35 KT
36HR VT 07/1800Z 19.4N 48.6W 35 KT
48HR VT 08/0600Z 20.1N 51.0W 40 KT
72HR VT 09/0600Z 21.3N 54.0W 40 KT
96HR VT 10/0600Z 23.0N 57.0W 45 KT
120HR VT 11/0600Z 25.5N 59.5W 55 KT

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Postby b_a88 on Sun Aug 07, 2005 12:37 am

TROPICAL DEPRESSION NINE DISCUSSION NUMBER 10
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
11 PM EDT SAT AUG 06 2005

THE DEPRESSION CONTINUES TO BE STRONGLY SHEARED. THERE IS A
WELL-DEFINED LOW-LEVEL CIRCULATION AND MOST OF THE CONVECTION IS TO
THE EAST OF THE CENTER. DVORAK CLASSIFICATIONS CAN HARDLY
SUPPORT A T-NUMBER BY USING THE DISTANCE BETWEEN THE CENTER AND THE
CONVECTION. INITIAL INTENSITY IS KEPT AT 30 KNOTS. IT IS DIFFICULT
TO VISUALIZE HOW THE CYCLONE WILL SURVIVE WITH THE CURRENT SHEAR
CAUSED BY THE AMPLIFYING UPPER-LOW TO ITS NORTH. THE ATLANTIC IS
PLAGUED WITH UPPER-LOWS...A PATTERN THAT IS UNFAVORABLE FOR
TROPICAL CYCLONES TO INTENSIFY. THE GFS IS KEEPING THE UNFAVORABLE
UPPER-LEVEL WINDS NEAR THE CYCLONE FOR DAYS...AND BOTH THE GFS AND
THE GFDL RELENTLESSLY INSIST ON DISSIPATING THE CYCLONE. IT IS
HARD TO GO AGAINST THESE TWO MODELS. HOWEVER...CONTINUITY FROM
PREVIOUS FORECASTS WILL BE FOLLOWED...AND THE OFFICIAL FORECAST
CALLS FOR SOME STRENGTHENING BY THE END OF THE PERIOD. THIS IS
BASED ON THE OTHER GLOBAL MODELS WHICH HAVE A LESS HOSTILE
ENVIRONMENT ALONG WITH THE SHIPS MODEL GUIDANCE.

THE CENTER HAS BEEN MOVING WESTWARD ABOUT 9 KNOTS DURING THE PAST
FEW HOURS. HOWEVER...MOST OF THE GUIDANCE IS IN FAIRLY GOOD
AGREEMENT MOVING THE CYCLONE TOWARD THE WEST-NORTHWEST OR 285
DEGREES AT 9 KNOTS DURING THE NEXT 2 TO 3 DAYS. THEREAFTER...THE
UK...THE ECMWF AND THE CANADIAN MODELS PREFER A SOUTHERNMOST TRACK
AND THE NOGAPS A NORTHERMOST. THE GFS AND GFDL ARE NOT INCLUDED
SINCE THEY DISSIPATE THE CYCLONE QUITE SOON. THE OFFICIAL FORECAST
TRACK IS IN THE MIDDLE OF THE GUIDANCE ENVELOPE. THERE IS LOW
CONFIDENCE IN THIS FORECAST BECAUSE IF THE SHEAR CONTINUES...THERE
WILL BE NOTHING TO TRACK AS SUGGESTED BY GFS AND GFDL MODELS.

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Postby b_a88 on Sun Aug 07, 2005 5:40 pm

TROPICAL STORM IRENE ADVISORY NUMBER 13
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
5 PM AST SUN AUG 07 2005

...POORLY ORGANIZED IRENE CONTINUES WEST-NORTHWESTWARD...

AT 5 PM AST...2100Z...THE CENTER OF TROPICAL STORM IRENE WAS LOCATED
NEAR LATITUDE 21.1 NORTH... LONGITUDE 46.5 WEST OR ABOUT 1100
MILES...1765 KM... EAST-NORTHEAST OF THE NORTHERN LEEWARD ISLANDS.

IRENE IS MOVING TOWARD THE WEST-NORTHWEST NEAR 10 MPH
...17 KM/HR...AND THIS MOTION IS EXPECTED TO CONTINUE FOR THE NEXT
24 HOURS.

MAXIMUM SUSTAINED WINDS ARE NEAR 40 MPH... 65 KM/HR...WITH HIGHER
GUSTS. LITTLE CHANGE IN STRENGTH IS FORECAST DURING THE NEXT 24
HOURS.

TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 45 MILES
... 75 KM...MAINLY TO THE EAST OF THE CENTER.

ESTIMATED MINIMUM CENTRAL PRESSURE IS 1005 MB...29.68 INCHES.

REPEATING THE 5 PM AST POSITION...21.1 N... 46.5 W. MOVEMENT
TOWARD...WEST-NORTHWEST NEAR 10 MPH. MAXIMUM SUSTAINED
WINDS... 40 MPH. MINIMUM CENTRAL PRESSURE...1005 MB.

THE NEXT ADVISORY WILL BE ISSUED BY THE NATIONAL
HURRICANE CENTER AT 11 PM AST.

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Postby b_a88 on Mon Aug 08, 2005 10:20 am

TROPICAL DEPRESSION IRENE DISCUSSION NUMBER 16
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
11 AM EDT MON AUG 08 2005

THE EXPOSED LOW-LEVEL CIRCULATION HAS BECOME INCREASINGLY SEPARATED
FROM WHAT IS LEFT OF THE CONVECTION TO ITS EAST THAT OCCURRED
OVERNIGHT. A QUIKSCAT OVERPASS NEAR 0820Z MISSED MOST OF THE
CIRCULATION BUT DID INDICATE SOME 35 KT WINDS JUST OUTSIDE OF THE
DEEP CONVECTION IN THE NORTHEASTERN QUADRANT. HOWEVER... AT THAT
TIME THE CONVECTION WAS DEEPER AND MORE INVOLVED WITH THE LOW-LEVEL
CENTER THAN IT HAS BEEN DURING THE PAST COUPLE OF HOURS... SO IT IS
PROBABLY SAFE TO ASSUME THAT THE WINDS HAVE DECREASED SINCE THEN.
DVORAK INTENSITY ESTIMATES HAVE ALSO FALLEN TO 30 KT. IRENE IS
THEREFORE DOWNGRADED TO A TROPICAL DEPRESSION WITH 30 KT WINDS. A
LIMITED AMOUNT OF CONVECTION HAS RESUMED JUST EAST OF THE
CENTER...BUT IT REMAINS TO BE SEEN IF THIS IS THE START OF A
COMEBACK. THE INTENSITY FORECAST IS ADJUSTED DOWNWARD FROM THE
PREVIOUS ADVISORY...AND CLOSER TO THE GFDL THAN THE SHIPS GUIDANCE.

THE TRACK AND INTENSITY FORECASTS ARE ALWAYS INTERDEPENDENT TO SOME
DEGREE...BUT FOR IRENE...ESPECIALLY IN THE 3-5 DAY PERIOD...ONE
COULD AFFECT THE OTHER PERHAPS MORE SO THAN USUAL. THE INITIAL
MOTION ESTIMATE IS 285/14. BASED ON A IRENE REMAINING WEAKER THAN
PREVIOUSLY EXPECTED...A CONTINUED WEST-NORTHWESTWARD MOTION WITHIN
THE LOW TO MID LEVEL FLOW IS FORECAST UNTIL VERY LATE IN THE
FORECAST...WHICH WOULD TAKE THE SYSTEM FARTHER WEST THAN THE
PREVIOUS ADVISORY. THIS SCENARIO IS IN BEST AGREEMENT WITH THE
GFDL...ECMWF...AND BAM SHALLOW SOLUTIONS.


TROPICAL DEPRESSION IRENE ADVISORY NUMBER 16
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
11 AM AST MON AUG 08 2005

...IRENE WEAKENS TO A TROPICAL DEPRESSION...

AT 11 AM AST...1500Z...THE CENTER OF TROPICAL DEPRESSION IRENE WAS
LOCATED NEAR LATITUDE 22.4 NORTH... LONGITUDE 50.7 WEST OR ABOUT
855 MILES...1375 KM... EAST-NORTHEAST OF THE NORTHERN LEEWARD
ISLANDS.

THE DEPRESSION IS MOVING TOWARD THE WEST-NORTHWEST NEAR 16 MPH
...26 KM/HR...AND THIS GENERAL MOTION IS EXPECTED TO CONTINUE DURING
THE NEXT 24 HOURS.

MAXIMUM SUSTAINED WINDS ARE NEAR 35 MPH... 55 KM/HR...WITH HIGHER
GUSTS. LITTLE CHANGE IN STRENGTH IS FORECAST DURING THE NEXT 24
HOURS.

ESTIMATED MINIMUM CENTRAL PRESSURE IS 1009 MB...29.80 INCHES.

REPEATING THE 11 AM AST POSITION...22.4 N... 50.7 W. MOVEMENT
TOWARD...WEST-NORTHWEST NEAR 16 MPH. MAXIMUM SUSTAINED
WINDS... 35 MPH. MINIMUM CENTRAL PRESSURE...1009 MB.

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Postby kanaloa on Mon Aug 08, 2005 10:33 am

This storm interests me bc I don't think NOAA has a freakin clue what it's doing or what it's going to do.

I have never seen such inconsistency in their forecasts in my life. It's humorous almost. ;)
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