Tropical Storm Danny #1

WOCN31 CWHX 261800
Information statement issued by the canadian hurricane
Centre of Environment Canada at 3.00 PM ADT Wednesday
26 August 2009.

Tropical storm Danny preliminary discussion:

Tropical storm Danny has formed north of the Bahamas and is
Expected to develop into a category 1 hurricane by the weekend
As it moves northwestward toward the Southeastern U.S. the storm
Is in its early stages of development and there remains a very
Large degree of uncertainty in both track and intensity. Much
Of that uncertainty is attributable to the fact that Danny is
Still in its development stage. Computer models are indicating
That the storm could become a weak hurricane (about a 40% chance
Of that) then accelerate toward the northwest then northeast.
Danny would likely undergo transition to a post-tropical storm
As it moves north toward the U.S. or Eastern Canada. The
Atmospheric environment around the storm only supports gradual
strengthening over a 2 to 3-day period before either making
Landfall in the us or accelerating toward the Maritimes.

The first official forecast of Danny from the national hurricane
centre in Miami indicates a post-tropical storm with possible
hurricane-force winds approaching the Maritimes late Saturday
night/early Sunday. That is just an early forecast containing
Much uncertainty with only a 5-10% chance of hurricane force
Winds affecting the Maritimes at this stage. Complete bulletins
From the canadian hurricane centre are scheduled to begin
At 9 AM ADT on Thursday.


End campbell/fogarty




WOCN31 CWHX 261800
INFORMATION STATEMENT ISSUED BY THE CANADIAN HURRICANE
CENTRE OF ENVIRONMENT CANADA AT 3.00 PM ADT WEDNESDAY
26 AUGUST 2009.

TROPICAL STORM DANNY PRELIMINARY DISCUSSION:

TROPICAL STORM DANNY HAS FORMED NORTH OF THE BAHAMAS AND IS
EXPECTED TO DEVELOP INTO A CATEGORY 1 HURRICANE BY THE WEEKEND
AS IT MOVES NORTHWESTWARD TOWARD THE SOUTHEASTERN U.S. THE STORM
IS IN ITS EARLY STAGES OF DEVELOPMENT AND THERE REMAINS A VERY
LARGE DEGREE OF UNCERTAINTY IN BOTH TRACK AND INTENSITY. MUCH
OF THAT UNCERTAINTY IS ATTRIBUTABLE TO THE FACT THAT DANNY IS
STILL IN ITS DEVELOPMENT STAGE. COMPUTER MODELS ARE INDICATING
THAT THE STORM COULD BECOME A WEAK HURRICANE (ABOUT A 40% CHANCE
OF THAT) THEN ACCELERATE TOWARD THE NORTHWEST THEN NORTHEAST.
DANNY WOULD LIKELY UNDERGO TRANSITION TO A POST-TROPICAL STORM
AS IT MOVES NORTH TOWARD THE U.S. OR EASTERN CANADA. THE
ATMOSPHERIC ENVIRONMENT AROUND THE STORM ONLY SUPPORTS GRADUAL
STRENGTHENING OVER A 2 TO 3-DAY PERIOD BEFORE EITHER MAKING
LANDFALL IN THE US OR ACCELERATING TOWARD THE MARITIMES.

THE FIRST OFFICIAL FORECAST OF DANNY FROM THE NATIONAL HURRICANE
CENTRE IN MIAMI INDICATES A POST-TROPICAL STORM WITH POSSIBLE
HURRICANE-FORCE WINDS APPROACHING THE MARITIMES LATE SATURDAY
NIGHT/EARLY SUNDAY. THAT IS JUST AN EARLY FORECAST CONTAINING
MUCH UNCERTAINTY WITH ONLY A 5-10% CHANCE OF HURRICANE FORCE
WINDS AFFECTING THE MARITIMES AT THIS STAGE. COMPLETE BULLETINS
FROM THE CANADIAN HURRICANE CENTRE ARE SCHEDULED TO BEGIN
AT 9 AM ADT ON THURSDAY.


END CAMPBELL/FOGARTY

Hello - Danny

000
WTNT35 KNHC 262035
TCPAT5
BULLETIN
TROPICAL STORM DANNY ADVISORY NUMBER 2
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL052009
500 PM EDT WED AUG 26 2009

...POORLY ORGANIZED DANNY MOVING WEST-NORTHWESTWARD AT A SLOWER
FORWARD SPEED...

INTERESTS IN THE BAHAMAS AND THE SOUTHEASTERN UNITED STATES SHOULD
MONITOR THE PROGRESS OF DANNY.

FOR STORM INFORMATION SPECIFIC TO YOUR AREA IN THE UNITED
STATES...INCLUDING POSSIBLE INLAND WATCHES AND WARNINGS...PLEASE
MONITOR PRODUCTS ISSUED BY YOUR LOCAL NATIONAL WEATHER SERVICE
FORECAST OFFICE. FOR STORM INFORMATION SPECIFIC TO YOUR AREA
OUTSIDE OF THE UNITED STATES...PLEASE MONITOR PRODUCTS ISSUED
BY YOUR NATIONAL METEOROLOGICAL SERVICE.

AT 500 PM EDT...2100 UTC...THE CENTER OF TROPICAL STORM DANNY WAS
LOCATED NEAR LATITUDE 25.2 NORTH...LONGITUDE 71.2 WEST OR ABOUT
390 MILES...625 KM...EAST OF NASSAU AND ABOUT 735 MILES...1185 KM...
SOUTH-SOUTHEAST OF CAPE HATTERAS NORTH CAROLINA.

DANNY IS MOVING TOWARD THE WEST-NORTHWEST NEAR 12 MPH...19 KM/HR. A
GENERAL NORTHWESTWARD MOTION WITH A DECREASE IN FORWARD SPEED IS
EXPECTED TONIGHT AND THURSDAY...WITH A TURN TOWARD THE NORTH
EXPECTED ON FRIDAY.

MAXIMUM SUSTAINED WINDS ARE NEAR 45 MPH...75 KM/HR...WITH HIGHER
GUSTS. SLOW STRENGTHENING IS POSSIBLE DURING THE NEXT COUPLE OF
DAYS.

TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 175 MILES...280 KM
FROM THE CENTER.

THE MINIMUM CENTRAL PRESSURE REPORTED BY AN AIR FORCE RESERVE
HURRICANE HUNTER AIRCRAFT IS 1009 MB...29.74 INCHES.

DANNY IS EXPECTED TO CAUSE STORM TOTAL RAINFALL OF 2 TO 3 INCHES...
WITH MAXIMUM AMOUNTS OF 4 INCHES...OVER THE CENTRAL AND
NORTHWESTERN BAHAMAS. STORM TOTAL RAINFALL OF 1 TO 2 INCHES ARE
EXPECTED OVER THE SOUTHEASTERN BAHAMAS AND THE TURKS AND CAICOS
ISLANDS.

...SUMMARY OF 500 PM EDT INFORMATION...
LOCATION...25.2N 71.2W
MAXIMUM SUSTAINED WINDS...45 MPH
PRESENT MOVEMENT...WEST-NORTHWEST OR 300 DEGREES AT 12 MPH
MINIMUM CENTRAL PRESSURE...1009 MB

THE NEXT ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE CENTER AT
1100 PM EDT.

$$
FORECASTER BEVEN

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

000
WTNT45 KNHC 262035
TCDAT5
TROPICAL STORM DANNY DISCUSSION NUMBER 2
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL052009
500 PM EDT WED AUG 26 2009

SATELLITE IMAGERY AND REPORTS FROM AN AIR FORCE RESERVE HURRICANE
HUNTER AIRCRAFT INDICATE THAT DANNY IS VERY DISORGANIZED AT THIS
TIME. THERE IS NO ORGANIZED CONVECTION NEAR THE CENTER...AND THE
STRONGEST WINDS ARE IN A BAND 100-150 N MI FROM THE CENTER OVER THE
NORTHERN SEMICIRCLE. THE AIRCRAFT REPORTED 1500 FT FLIGHT-LEVEL
WINDS OF 49 KT AND ESTIMATED SURFACE WINDS OF 40-45 KT FROM THE
SFMR. BASED ON THIS...THE INITIAL INTENSITY REMAINS 40 KT. THE
AIRCRAFT JUST REPORTED A CENTRAL PRESSURE OF 1007 MB.

THE INITIAL MOTION IS A SOMEWHAT UNCERTAIN 300/10...UNCERTAIN
BECAUSE THE STORM SEEMS TO BE DECELERATING...AND THE CENTER MAY BE
OCCASIONALLY RE-FORMING DUE TO CONVECTIVE BURSTS. THERE IS NO
CHANGE TO THE PREVIOUS FORECAST REASONING. DANNY IS NORTH OF A
MID/UPPER-LEVEL LOW CENTERED OVER HISPANIOLA AND SOUTHWEST OF A
MID/UPPER-LEVEL RIDGE CENTER EAST OF BERMUDA. THIS PATTERN SHOULD
STEER DANNY GENERALLY NORTHWESTWARD FOR THE NEXT 24 HR OR SO.
AFTER THAT...A MID/UPPER-LEVEL TROUGH SHOULD DEVELOP OVER THE GREAT
LAKES...WITH A MID/UPPER-LEVEL LOW OVER THE GULF COAST STATES
MOVING EASTWARD OR NORTHEASTWARD. THIS EVOLUTION SHOULD CAUSE
DANNY TO TURN NORTHWARD AND THEN RECURVE INTO THE WESTERLIES.
WHILE THE MODELS AGREE ON THE SCENARIO...THERE IS STILL SIGNIFICANT
UNCERTAINTY AS TO WHAT LAND AREA DANNY MAY AFFECT. THE ECMWF...
UKMET...AND CANADIAN MODELS FORECAST THE CENTER TO PASS NEAR CAPE
HATTERAS AND THEN MAKE LANDFALL IN NEW ENGLAND. THE GFS AND GFDL
SHOW THE CENTER PASSING EAST OF HATTERAS AND THEN PASSING NEAR OR
OVER CAPE COD. THE HWRF AND NOGAPS...AS WELL AS THE CORRECTED
CONSENSUS MODELS...SHOW THE CENTER PASSING EAST OF CAPE COD AND
NEAR OR OVER NOVA SCOTIA. OVERALL..THE GUIDANCE ENVELOPE HAS
SHIFTED SLIGHTLY TO THE EAST SINCE THE LAST ADVISORY. THE NEW
FORECAST TRACK IS ALSO SHIFTED SLIGHTLY TO THE EAST AND LIES NEAR
THE MIDDLE OF THE GUIDANCE ENVELOPE. THE FORECAST TRACK IS ROUGHLY
PARALLEL TO THE U. S. EAST COAST...AND ANY DEVIATION FROM THE TRACK
COULD MAKE A LARGE DIFFERENCE IN WHAT AREAS GET IMPACTED BY DANNY.
THEREFORE...IT IS IMPORTANT NOT TO FOCUS TOO MUCH ON THE EXACT
FORECAST TRACK.

THE INTENSITY FORECAST REMAINS PROBLEMATIC. WATER VAPOR IMAGERY
SHOWS UPPER-LEVEL LOWS NORTH AND SOUTH OF DANNY CONNECTED BY A
CYCLONIC SHEAR AXIS. THIS IS NOT A IDEAL PATTERN FOR
STRENGTHENING...AND IT MAY TAKE 24 HR OR MORE FOR THE ENVIRONMENT
TO BECOME MORE FAVORABLE. IN ADDITION...THE CURRENT STRUCTURE OF
THE STORM FAVORS SLOW STRENGTHENING AT BEST. BASED ON THIS...THE
INTENSITY FORECAST CALLS FOR SLOW STRENGTHENING FOR THE FIRST
36 HR. IT THEN SHOWS A FASTER STRENGTHENING FROM 36-48 HR AS
CONDITIONS BECOME MORE FAVORABLE. AFTER 48 HR...STRONG UPPER-LEVEL
SOUTHWESTERLY WINDS ASSOCIATED WITH THE EASTERN U. S. TROUGHS ARE
EXPECTED TO CAUSE INCREASED SHEAR AND INITIATE EXTRATROPICAL
TRANSITION...WHICH COULD START BEFORE DANNY REACHES THE LATITUDE OF
NEW ENGLAND. THE INTENSITY FORECAST CALLS FOR DANNY TO REACH 65 KT
IN 72 HR...THEN BECOME EXTRATROPICAL BY 96 HR. THE INTENSITY
FORECAST IS IN BEST AGREEMENT WITH THE SHIPS AND LGEM MODELS.
HOWEVER...IT REMAINS WEAKER THAN THE FORECASTS OF THE GFDL AND
HWRF.

FORECAST POSITIONS AND MAX WINDS

INITIAL 26/2100Z 25.2N 71.2W 40 KT
12HR VT 27/0600Z 26.0N 72.5W 40 KT
24HR VT 27/1800Z 27.1N 73.8W 45 KT
36HR VT 28/0600Z 28.7N 74.5W 50 KT
48HR VT 28/1800Z 31.1N 74.5W 60 KT
72HR VT 29/1800Z 38.5N 71.5W 65 KT
96HR VT 30/1800Z 47.5N 63.5W 60 KT...EXTRATROPICAL
120HR VT 31/1800Z 53.1N 48.0W 45 KT...EXTRATROPICAL

$$
FORECASTER BEVEN

Bye Bye Bill - Extratropical Storm Bill Makes Landfall in Scotland as a weakening Gale Centre