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Atlantic Tropical Action 2013 - Part 2


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As someone who spent several years of grad school studying the THC, let me save you trouble: that is the stupidest, sloppiest work I've ever seen.

 

No, the THC argument actually makes a lot of sense. Anomalous subsidence and dry air over the deep tropics has been largely a result of the anomalous meridonal atmospheric circulation (mass transport/flux) in the north and south atlantic basins. This is a result of the merdional SSTA pattern. A weakening of the thermohaline circulation would directly influence the meridional SSTA pattern. Furthermore, although CSU blames the "Thermohaline Circulation", the parameters they include in their THC Proxy, aren't strictly looking at the THC. CSU is looking at polar SSTs, meridional wind, and SLP (see below). These variables are intended to describe the atmospheric and oceanic meridional circulation.

 

In other words, CSU's conclusion cites the same problem many of us, myself included, have been looking at all season long:

The Meridional Circulation of the Coupled Ocean Atmosphere over the Atlantic Basin.

 

 

 

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I suppose I'll start it in late December.   :)  But I have to say, the NATL has left me feeling really cold and unenthused.  The fact that I felt forced to chase in the WPAC this year-- something I never had the slightest interest in doing-- is just a testament to the incredible lameness of the NATL during the last half-decade.  I can see having a bad year here and there, but this is just getting ridiculous.  If you're into real, red-meat, deep-tropical action, the basin has completely sucked since 2008-- that was the last decent season.

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SPECIAL TROPICAL WEATHER OUTLOOK
NWS NATIONAL HURRICANE CENTER MIAMI FL
1250 PM EST WED DEC 4 2013

 

FOR THE NORTH ATLANTIC...CARIBBEAN SEA AND THE GULF OF MEXICO...

1. SHOWERS AND THUNDERSTORMS HAVE INCREASED IN ASSOCIATION WITH A
NON-TROPICAL LOW CENTERED ABOUT 450 MILES SOUTH OF THE AZORES
ISLANDS.  THE LOW IS PRODUCING WINDS OF NEAR 60 MPH...AND SOME
ADDITIONAL DEVELOPMENT OF THIS SYSTEM IS POSSIBLE DURING THE NEXT
DAY OR SO BEFORE IT IS AFFECTED BY STRONG UPPER-LEVEL WINDS AND
MOVES OVER COLDER WATER.  THIS SYSTEM HAS A LOW CHANCE...20
PERCENT...OF BECOMING A SUBTROPICAL OR TROPICAL CYCLONE DURING THE
NEXT 48 HOURS...AND A LOW CHANCE...20 PERCENT... OF BECOMING A
SUBTROPICAL OR TROPICAL CYCLONE DURING THE NEXT FIVE DAYS.

ADDITIONAL INFORMATION ON THIS SYSTEM CAN BE FOUND IN HIGH SEAS
FORECASTS ISSUED BY METEO FRANCE.  ANOTHER SPECIAL TROPICAL WEATHER
OUTLOOK ON THIS SYSTEM WILL BE ISSUED NEAR 1 PM EST THURSDAY
DECEMBER 5...OR SOONER IF NECESSARY.

 

HIGH SEAS FORECASTS ISSUED BY METEO FRANCE CAN BE FOUND UNDER WMO
HEADER FQNT50 LFPW.

 

FIVE-DAY FORMATION PROBABILITIES ARE EXPERIMENTAL IN 2013. COMMENTS
ON THE EXPERIMENTAL FORECASTS CAN BE PROVIDED AT...

 

HTTP://WWW.NWS.NOAA.GOV/SURVEY/NWS-SURVEY.PHP?CODE=ETWO

 

FORECASTER BEVEN

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SPECIAL TROPICAL WEATHER OUTLOOK

NWS NATIONAL HURRICANE CENTER MIAMI FL

1250 PM EST WED DEC 4 2013

 

FOR THE NORTH ATLANTIC...CARIBBEAN SEA AND THE GULF OF MEXICO...

1. SHOWERS AND THUNDERSTORMS HAVE INCREASED IN ASSOCIATION WITH A

NON-TROPICAL LOW CENTERED ABOUT 450 MILES SOUTH OF THE AZORES

ISLANDS.  THE LOW IS PRODUCING WINDS OF NEAR 60 MPH...AND SOME

ADDITIONAL DEVELOPMENT OF THIS SYSTEM IS POSSIBLE DURING THE NEXT

DAY OR SO BEFORE IT IS AFFECTED BY STRONG UPPER-LEVEL WINDS AND

MOVES OVER COLDER WATER.  THIS SYSTEM HAS A LOW CHANCE...20

PERCENT...OF BECOMING A SUBTROPICAL OR TROPICAL CYCLONE DURING THE

NEXT 48 HOURS...AND A LOW CHANCE...20 PERCENT... OF BECOMING A

SUBTROPICAL OR TROPICAL CYCLONE DURING THE NEXT FIVE DAYS.

ADDITIONAL INFORMATION ON THIS SYSTEM CAN BE FOUND IN HIGH SEAS

FORECASTS ISSUED BY METEO FRANCE.  ANOTHER SPECIAL TROPICAL WEATHER

OUTLOOK ON THIS SYSTEM WILL BE ISSUED NEAR 1 PM EST THURSDAY

DECEMBER 5...OR SOONER IF NECESSARY.

 

HIGH SEAS FORECASTS ISSUED BY METEO FRANCE CAN BE FOUND UNDER WMO

HEADER FQNT50 LFPW.

 

FIVE-DAY FORMATION PROBABILITIES ARE EXPERIMENTAL IN 2013. COMMENTS

ON THE EXPERIMENTAL FORECASTS CAN BE PROVIDED AT...

 

HTTP://WWW.NWS.NOAA.GOV/SURVEY/NWS-SURVEY.PHP?CODE=ETWO

 

FORECASTER BEVEN

 

 

Not terrible for an possible Sub-Tropical low in the middle of nowhere in December.

post-138-0-63300300-1386224083_thumb.jpg

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