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EPAC Tropical Action 2011


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I've been arguing since last year that the global dynamical models are now pretty skillful at determining d(intensity)/dt. Obviously, they're not going to get the absolute wind speeds right, but I've been using them successfully for relative intensity changes for the last year.

Yea I noticed that too! Dynamical guidance did a great job last year indicating that Gaston would not regenerate and remain weak despite the insistent statistical guidance trying to make it a hurricane. Of course lets just forget Fiona and all the the ECWMF's shenanigans with that system, although the GFS handled that storm remarkably well considering the expectations.

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The Euro and the GFS have something down there around the 4th. I'm not all that excited about it. The MJO should be east of that region by then.

Yo, what's up? Despite being up super-late last night, I got up at a reasonable hour today. Woo hoo!

Re: the EPAC... I'm not holding my breath for anything, but there seemed to be a slight turning to that convection this morning.

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Yo, what's up? Despite being up super-late last night, I got up at a reasonable hour today. Woo hoo!

Re: the EPAC... I'm not holding my breath for anything, but there seemed to be a slight turning to that convection this morning.

Looking at the GFS, the little feature you noted is likely to get tangled up with the Caribbean feature, which won't help either feature since the bulk of the 850mb vorticity remains over land.

2njaqmb.gif

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Arlene remnants ftw...

TROPICAL WEATHER OUTLOOK

NWS NATIONAL HURRICANE CENTER MIAMI FL

1100 AM PDT FRI JUL 1 2011

FOR THE EASTERN NORTH PACIFIC...EAST OF 140 DEGREES WEST LONGITUDE..

THE REMNANTS OF ATLANTIC TROPICAL STORM ARLENE ARE LOCATED INLAND

OVER CENTRAL MEXICO AND ARE PRODUCING DISORGANIZED SHOWERS AND

THUNDERSTORMS ALONG THE SOUTHWESTERN COAST OF MEXICO. THIS SYSTEM

IS EXPECTED TO MOVE WESTWARD OVER THE PACIFIC OCEAN DURING THE NEXT

DAY OR TWO...BUT COLD WATER WEST OF CENTRAL MEXICO IS NOT CONDUCIVE

FOR RE-DEVELOPMENT. THERE IS A LOW CHANCE...10 PERCENT...OF THIS

SYSTEM BECOMING A TROPICAL CYCLONE OVER THE PACIFIC DURING THE

NEXT 48 HOURS. REGARDLESS OF DEVELOPMENT...HEAVY RAINS ARE POSSIBLE

NEAR THE COAST OF CENTRAL AND SOUTHWESTERN MEXICO OVER THE NEXT

COUPLE OF DAYS...ESPECIALLY OVER MOUNTAINOUS TERRAIN.

ELSEWHERE...TROPICAL CYCLONE FORMATION IS NOT EXPECTED DURING THE

NEXT 48 HOURS.

$$

FORECASTER BEVEN

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The Euro, GFS and Canadian suggest a weak TC forming later in the week...

TROPICAL WEATHER OUTLOOK

NWS NATIONAL HURRICANE CENTER MIAMI FL

1100 PM PDT SUN JUL 3 2011

FOR THE EASTERN NORTH PACIFIC...EAST OF 140 DEGREES WEST LONGITUDE..

A BROAD AREA OF LOW PRESSURE LOCATED ABOUT 300 MILES SOUTH OF THE

BORDER OF GUATEMALA AND EL SALVADOR IS PRODUCING WIDESPREAD

CLOUDINESS BUT LIMITED SHOWER ACTIVITY. HOWEVER...ENVIRONMENTAL

CONDITIONS APPEAR FAVORABLE FOR SOME GRADUAL DEVELOPMENT OF THIS

DISTURBANCE AS IT MOVES WEST-NORTHWESTWARD AT 5 TO 10 MPH OVER THE

NEXT COUPLE OF DAYS. THERE IS A LOW CHANCE...10 PERCENT...OF THIS

SYSTEM BECOMING A TROPICAL CYCLONE IN THE NEXT 48 HOURS.

ELSEWHERE...TROPICAL CYCLONE FORMATION IS NOT EXPECTED DURING THE

NEXT 48 HOURS.

$$

FORECASTER STEWART

post-32-0-82561900-1309771840.gif

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MR shot in the dark guess for next EPAC genesis: July 7-9, assuming the strong Kelvin wave forecasted holds up. The MJO will be favorable for things to brew down there for the next week or so.

Meh, this is in the Euro and UKM, but not very strong or interesting.

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