Area Forecast Discussion
National Weather Service Mobile Al
423 Am Cdt Thu Jul 7 2005
...hurricane Dennis Forecast Into The Gulf This Weekend...
...dennis Is Forecast To Become A Major Hurricane...
.synopsis...weather Map This Morning Shows That The Remnant Low Of
Cindy Has Merged With A Stalled Frontal Zone...northwest Of Atlanta
Georgia. A Trailing Trof Of Low Pressure From The Low Extends Back
Into The Forecast Area. Meanwhile...hurricane Dennis Was Southeast Of
Jamaica Churning West Northwestward Across The Caribbean.
&&
.short Term...(today And Tonight)...relatively Cool And Dry Boundary
Layer Conditions Exist Across The Forecast In The Wake Of T.s.
Cindy. Northwest Flow Prevails Up To 6kt Ft...advecting Dry Air Into
Southeast Mississippi And Southwest Alabama. Stratus Cloud Deck With
A Base Around 1000 Ft Across The Northeast Portions Of The Forecast
Area Continues To Lift To The Northeast. Some Clouds Will Linger
Early This Morning...but Clear The Cwa By Noon. The Nam Model Is
Over Forecasting The Amount Of Available Moisture In The Low
Levels...so Therefore Did Not Jump On The Higher (scattered)
Precipitation Chances For Today. Gfs Seems Reasonable With Late
Afternoon/early Evening High Based Isolated Showers. Deep Convection
Should Be Limited So Left Thunder Out. Various Model Temperature
Guidance Similar For Today With Highs Generally In The Upper 80s.
Went With The Cooler Gfs Guidance For Tonight As Surface Dewpoints
Will Not Have Recovered By Then. /22
Friday...a Weakness In The Upper Atmosphere Looks To Hang Around
The Forecast Area And May See A Small Recovery Of Deep Layer
Moisture To Go With Small Coverages Of Daytime Showers And
Thunderstorms. /10
.long Term...with Each Shift...we Are Becoming Increasingly
Concerned On The Forecast Track Of Dennis. As Dennis Emerges
Into The Gulf Of Mexico Early In The Weekend...dennis Looks To Be A
Major Hurricane Churning Over The Warm Oceanic Waters Of The Gulf Of
Mexico Within A Low Shear Environment. The Forecast From The Tropical
Prediction Center Is Calling For Dennis To Begin Taking On More Of A
Poleward Curve Saturday...around An Upper Ridge Of High Pressure That
Will Be Positioned Over The Southeast U.s. This Takes The Track Into
The North Central Gulf States Late In The Weekend Into Early Monday.
If The Forecast Holds...this Will Be Potentially The 2nd Major
Hurricane To Impact The Area In Less Than A Year. /10
Of Note...in The Extended Outlook For Tropical Cyclones. Errors For
Track Have Averaged Near 250 Nautical Miles On Day 4 And 325
Nautical Miles On Day 5...and For Intensity Near 20 Knots Each Day.
Thus...it Is Not Important To Focus Solely On A Fixed Point...but For
A Larger Threat Cone. Best Course Of Action Right Now Is To Review
Hurricane Preparedness Plans And To Stay Up To Date On The Latest
Information From The Tropical Prediction Center. /10
&&
.marine...a Light Northwest Flow Will Turn To The Southwest By Late
Afternoon With The Aid Of Land Surface Heating. Winds Will Turn
Offshore Again Tonight As High Pressure Builds In From The North.
Pressure Gradient Begins To Tighten Between The High Pressure And
The National Hurricane Centers Prediction Of Approaching Hurricane
Dennis. Will Bring Up Winds And Seas Accordingly Over The Weekend...
And Just Mention Hurricane Conditions Possible In The Extended. /22
&&
.fire Weather...no Concerns. /10
&&
.preliminary Point Temps/pops...
Mobile 89 73 92 73 / 10 10 20 10
Pensacola 89 75 92 75 / 10 10 20 10
Destin 88 77 91 77 / 10 10 20 10
Evergreen 89 68 93 71 / 10 10 30 10
Waynesboro 90 69 93 70 / 10 20 30 10
Camden 89 68 93 71 / 10 20 30 10
&&
.mob Watches/warnings/advisories...
Al...none.
Fl...none.
Ms...none.



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