my instructors drummed into me that a good forecast has to start with a near perfect analysis
I agree with that entirely..always have..darn near preached it a few times..lol
Moderator: S2k Moderators

PurdueWx80 wrote:AFM - I agree whole-heartedly w/ you on the hand analysis. They still teach these methods at Purdue - and I'd like to think of myself as an equally excellent analyzer because of this. Computer algorithms that do all of the analysis for you aren't perfect, and sometimes a subjective look is much better than the rules a computer follows. Don't be ashamed!!!! Dinosaurs are cool!

Air Force Met wrote:Nope...don't feel foolish at all. That is a wrong analysis. Sorry.
<snip>
Do you see a trough at 90W? No...there is a ridge and a high sitting over eastern LA. The trough is now sitting a little NNE of Ivan and has lifted out. Again...look at the links I posted and tell me where that is wrong? Look at the one I just posted. There is no trough there. How can there be a "digging trough" in anticyclonic flow?
<snip>
So...do I feel foolish? Nope. However wrote that discussion ought to though. Don't take my word for it...here is what the NHC said about it:
A SECOND MID-LEVEL HIGH IS
CENTERED OVER LOUISIANA WITH A RIDGE EXTENDING SOUTHWARD INTO THE
WESTERN GULF OF MEXICO. 12Z RAOBS AND JET DATA INDICATE THAT THIS
LATTER RIDGE IS A LITTLE STRONGER THAN FORECAST BY THE 6Z GFS RUN.
Compair that to what the writer of the discussion wrote AND the data. Who do YOU think is right? The NHC or the lone individual who is bucking the NHC and the data?
So...NO!! don't feel foolish at all. Actually, I feel very right about my analysis on the RIDGE located over LA (See the NHC 11 am discussion...if there was a trough west of Ivan and digging south...they would have mentioned it!...They don't...they only talk about the ridge that I said was there).
Why do I feel right? Because the 12z analysis (not some model...the actual plots)...backs it up.
Look again at the title on that "tropical discussion" you're disagreeing with.
It originates from the TAFB, you know, where the NHC gets its data...AXNT20 KNHC 141211
TWDAT
TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
805 AM EDT TUE 14 SEP 2004
TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHEASTERN
SECTIONS OF SOUTH AMERICA...AND ATLC OCEAN TO THE AFRICAN
COAST FROM THE EQUATOR TO 32N. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...
AND METEOROLOGICAL ANALYSIS.
BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1145 UTC.
<snip>
...DISCUSSION...
GULF OF MEXICO...
BIG WEATHER MAKER IN THE GULF IS HURRICANE IVAN. SEE SPECIAL
FEATURES ABOVE. TROUGH CONTINUES TO MOVE SLOWLY TO OVER THE E
UNITED STATES WITH A WELL DEFINED UPPER LEVEL LOW MOVING NE
ACROSS KENTUCKY. WATER VAPOR IMAGERY SHOWS THAT BASE OF THE
TROUGH AMPLIFIED INTO THE CENTRAL GULF WITH ASSOCIATED
SUBSIDENCE AND DRY AIR NOW AFFECTING MOST OF THE N GULF COAST
FROM THE FLORIDA PANHANDLE TO TEXAS. A SHORTWAVE TROUGH EXTENDS
S OVER THE CENTRAL GULF AHEAD OF HURRICANE IVAN.
ELSEWHERE...MODERATE SUBSIDENCE AND DRY AIR AHEAD OF HURRICANE
IVAN PREVAILS OVER THE W GULF CREATING A TEMPORARY PERIOD OF
TRANQUIL CONDITIONS EXCEPT ALONG THE IMMEDIATE TEXAS COAST WHERE
ISOLATED SHOWERS PREVAIL FROM CORPUS CHRISTI TO GALVESTON.
CARIBBEAN...
EVEN THOUGH IVAN IS OUT OF THE CARIBBEAN INTO THE GULF MEXICO
BROAD RIDGING IS STILL COVERING THE W TWO-THIRDS OF THE
CARIBBEAN. AN OUTER RAINBAND ASSOCIATED WITH IVAN EXTENDS S
ACROSS W CUBA INTO THE GULF OF HONDURAS. TROUGH IN THE
CENTRAL/WESTERN ATLC EXTENDS INTO THE CARIBBEAN FROM THE VIRGIN
ISLANDS TO HISPANIOLA. TO THE E...T.D. ELEVEN IS NEAR THE
LEEWARD ISLANDS. SEE SPECIAL FEATURES ABOVE.
<snip>
$$
WALLACE

tronbunny wrote:
I'm just showing you where ANYONE would get the idea that a trough was digging in!
Your gripe is with no one that reads this stuff, it's with the forecaster,
Wallace.
Now go take a chill pill.



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