NHC reports low to mid-level cyclonic turning along both wave axes
Posted by jack ruby on 8/7/2009, 5:19 pm
Not saying its anything special. Just saying that I think there is a chance in the open Atlantic. There is convection along the ITCZ associated with the first wave axis with some cyclonic turning), and second wave axis (further out) even though embedded in dry saharan air also shows some turning according to the NHC. Its been awfully quiet, but the central Atlantic has to be considered now that we've reached Aug 7th (I think). Here's the last NHC Tropical Weather Discussion.

TROPICAL WAVES...

A TROPICAL WAVE IS ALONG 35W S OF 17N MOVING W NEAR 13 KT. THIS
WAVE COINCIDES WITH A DEEP LAYER MOISTURE MAXIMUM OBSERVED IN
TOTAL PRECIPITABLE WATER IMAGERY. SATELLITE IMAGERY AND
SATELLITE DERIVED WINDS INDICATE LOW/MID-LEVEL CYCLONIC FLOW IN
THE VICINITY OF THE WAVE AXIS. A DRY SAHARAN AIR LAYER IS JUST E
OF THE WAVE AXIS INHIBITING DEEP CONVECTION NEAR THE WAVE.

A TROPICAL WAVE IS ALONG 53W S OF 15N MOVING W 15-20 KT. THIS
WAVE IS LOW AMPLITUDE AND EMBEDDED WITHIN THE ITCZ. WAVE
POSITION IS BASED MAINLY ON CONTINUITY. HOWEVER...RECENT
SATELLITE DERIVED WINDS DO SHOW SLIGHT LOW/MID-LEVEL CYCLONIC
FLOW NEAR THE WAVE AXIS. SCATTERED MODERATE/ISOLATED STRONG
CONVECTION IS LIMITED TO THE ITCZ FROM 9N-12N BETWEEN 52W-57W.  

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Just when I thought our little wave might be toast - jack ruby, 8/6/2009, 8:03 pm
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