Dann Cianca (leporinis) wrote in tropicalstorm,
Dann Cianca
leporinis
tropicalstorm

91L INVEST



Though ... there is little to no convection at the center and the SSTs aren't exactly fertile breeding ground.

Enhanced IR Loop

Discussion:
ATLANTIC OCEAN...
THE WESTERN SW N ATLC IS UNDER UPPER LEVEL NORTHWESTERLY FLOW
WHICH MARKS THE WESTERN EXTENT OF BROAD CYCLONIC FLOW DUE TO A
RATHER VIGOROUS SHORTWAVE TROUGH WITH ITS MEAN AXIS EXTENDING
ROUGHLY FROM 32N70W TO 20N74W. THE CYCLONIC FLOW EXTENDS
EASTWARD TO 60W. DIFFLUENCE INDICATED EAST OF THE TROUGH
CONTINUES TO ENHANCE CONVECTION WELL EAST OF A SURFACE COLD
FRONT THAT EXTENDS FROM A GALE CENTER NEAR 32N70W 1007 MB
THROUGH 27N70W TO EASTERN CUBA WHERE IT IS BECOMING ILL-DEFINED.
THIS CONVECTION CONSISTS OF THE SCATTERED MODERATE/ISOLATED
STRONG TYPE AND IS FOUND GENERALLY WITHIN AN AREA BOUNDED FROM
24N-30N BETWEEN 60W-67W. WIDELY SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS ARE SEEN SOUTH OF 24N BETWEEN 60W-65W. ONLY
ISOLATED SHOWERS AND THUNDERSTORMS ARE ALONG AND WITHIN ABOUT 60
NM EAST OF THE COLD FRONT FROM 23N-26N. SCATTERED TO BROKEN LOW
CLOUDS WITH ISOLATED SHOWERS MOVING SOUTH-SOUTHEAST IN CYCLONIC
FLOW DUE TO THE GALE CENTER ARE PRESENT WEST OF THE COLD FRONT
NORTH OF 23N.

TO THE EAST OF THE SHORTWAVE TROUGH...A RATHER COMPACT MID/UPPER
LEVEL RIDGING IS SEEN NORTH OF 19N BETWEEN 53W-60W. EAST OF THIS
RIDGE...A LONGWAVE TROUGH CONTINUES TO DOMINATE THE CENTRAL NORTH
ATLANTIC. AN EMBEDDED CYCLONE MOVING WESTWARD 15 KT IS NOTED
NEAR 25N45W. MODERATE SUBSIDENCE AND DRY AIR IS NOTED NORTH OF
20N BETWEEN 50W-60W. AT THE SURFACE...HIGH PRESSURE RIDGING
EXTENDS THROUGH 32N52W TO 27N63W. HIGH PRESSURE COVERS THE AREA
NORTH OF 20N EAST OF 62W.



~dann
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