Tropical Depression Gabrielle Racing to its Doom in North Atlantic

Tropical Depression Gabrielle Advisory Number 21
Nws National Hurricane Center Miami Fl
1100 Am Ast Fri Sep 13 2013

Gabrielle Accelerates North-Northeastward...
Expected To Bring Rains To Atlantic Canada...

Summary Of 1100 Am Ast...1500 Utc...Information
-----------------------------------------------
Location...39.1n 66.5w
About 245 Mi...390 Km Se Of Nantucket Massachusetts
About 410 Mi...655 Km Ssw Of Halifax Nova Scotia
Maximum Sustained Winds...35 Mph...55 Km/H
Present Movement...Nne Or 20 Degrees At 23 Mph...37 Km/H
Minimum Central Pressure...1007 Mb...29.74 Inches

Watches And Warnings
--------------------
There Are No Coastal Watches Or Warnings In Effect.

Discussion And 48-Hour Outlook
------------------------------
At 1100 Am Ast...1500 Utc...The Center Of Tropical Depression
Gabrielle Was Located Near Latitude 39.1 North...Longitude 66.5
West.

The Depression Is Moving Toward The North-Northeast Near 23
Mph...37 Km/H. Gabrielle Is Expected To Continue Moving
North-Northeast With An Increase In Forward Speed During The Day
Today.

Maximum Sustained Winds Are Near 35 Mph...55 Km/H...With Higher
Gusts. The Circulation Of Gabrielle Is Expected To Dissipate By
Tonight As It Approaches Nova Scotia.

The Estimated Minimum Central Pressure Is 1007 Mb...29.74 Inches.

Hazards Affecting Land
----------------------
Rainfall...Gabrielle Is Expected To Bring Rainfall Amounts Of 2 To 4
Inches To Portions Of Atlantic Canada Over The Next Day Or So.
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Tropical Depression Gabrielle Discussion Number 21
Nws National Hurricane Center Miami Fl
1100 Am Ast Fri Sep 13 2013

Ambiguities From An 0200 Utc Ascat Pass Suggest That There Are Very Little...If Any...Northerly Winds On The West Side Of The
Circulation. Gabrielle Has Accelerated Toward The North-Northeast
Since That Time...Reducing The Likelihood That North Winds Are
Present. However...A Large Burst Of Convection During The Past 6
Hours At Least Makes It Plausible That The Circulation Remains
Closed...And So Gabrielle Is Being Held As A 30 Kt Tropical
Depression For This Advisory. A Slight Increase In The Maximum
Winds Is Possible Today Due To Baroclinic Processes.

The Forward Speed Of Gabrielle Has Increased During The Past Few
Hours...And The Initial Motion Estimate Is Now 020/20. All Of The
Dynamical Models Suggest That The Depression Will Continue To
Accelerate Toward The North-Northeast While It Interacts With A
Deep-Layer Trough Located Over The Eastern United States And Canada. The Guidance Suggests That Gabrielle Will Open Up Into
A Trough Later Today...Although The Official Forecast Conservatively Shows A 12-Hour Forecast Point. After That...Gabrielle Or Its Remnants Should Get Absorbed By An Approaching Cold Front.

Forecast Positions And Max Winds

Init 13/1500z 39.1n 66.5w 30 Kt 35 Mph
12h 14/0000z 43.2n 64.6w 35 Kt 40 Mph...Post-Tropical
24h 14/1200z...Dissipated

Forecaster Franklin/Zelinsky


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