Réseau du Capitaine

Lundi matin le 21 mai 2007

Fleur d’Acier
37 27N par 16 37W

Aldebaran
37 53N par 16 49W

Calbodine
Quitte Bermudes vers N York

Escapade B
30 23N par 55 56W
En direction des Açores

Leo Cat
31 33N par 71 39W
En direction des Bermudes

Brania
39 55N par 73 55W
30 milles de N York


805 AM EDT MON MAY 21 2007...TROPICAL WAVES...TROPICAL WAVE...THE FIRST TRACKED ON OUR SFC MAP IN 2007...IS LOCATED ALONG 21W/22W S OF 10N MOVING W ABOUT 15 KT. THIS WAVE APPEARS TO HAVE MOVED OFF THE AFRICAN COAST AROUND 06Z ON SAT BASED ON SATELLITE AND SFC DATA OVER THE PAST FEW DAYS. THE WAVE PLACEMENT WAS BASED ON LOW TO MID LEVEL CURVATURE SEEN ON NIGHT CHANNEL VIS IMAGES WHICH ALSO SEEMED TO MESH WELL WITH A SHIP AND BUOY REPORT SURROUNDING THE FEATURE. THE BUOY...CALL SIGN 31006...HAS BEEN PARTICULARLY HELPFUL SHOWING THE WIND VEER MORE TOWARD THE E POSSIBLY INDICATING THE APPROACH OF THE WAVE AXIS. HOWEVER...EARLY MORNING'S VIS IMAGERY SUGGESTS THAT THE WAVE AXIS COULD BE FURTHER W BASED ON THE SHAPE OF THE LOW-MID LEVEL CLOUD FIELD...SO THE FORWARD SPEED OF THE WAVE MIGHT BE CLOSER TO 20 KT. THIS WEAK FEATURE IS LOW-LATITUDE AND IT'S MAIN FUNCTION IS PERTURBING THE ITCZ SLIGHTLY. SCATTERED MODERATE CONVECTION IS WITHIN 180 NM E OF THE WAVE AXIS.CARIBBEAN SEA...SFC OBS AND NIGHT CHANNEL VIS IMAGERY CONTINUE TO SHOW THAT THE SFC TROUGH ALONG 81W REMAINS WEAK YET EVIDENT IN THE LOW-LEVEL WINDS AS IT SLOWLY DRIFTS W. A QSCAT PASS AROUND 00Z CONFIRMS THIS WITH MODERATE TO FRESH ELY TRADES E OF THE AXIS AND LIGHT N TO NE WINDS TO THE W OF THE AXIS. THE UPPER PATTERN IS BROADLY WLY AROUND THE NRN PERIPHERY OF A FLAT RIDGE CENTERED OVER NRN SOUTH AMERICA. LARGE CLUSTERS OF MODERATE CONVECTION ARE SCATTERED TO NUMEROUS ALONG THE ITCZ WITH ONE CLUSTER BEING ENHANCED BY CONVERGENCE ALONG THE TROUGH STRETCHING WITHIN 150 NM E OF THE AXIS S OF 16N. SMALLER PATCHES OF LOW TOPPED SHOWERS AND TSTMS...ASSOCIATED WITH THE TAIL END OF A W ATLC TROUGH...ARE OBSERVED BETWEEN JAMAICA AND CUBA AND FURTHER NE IN THE SE BAHAMAS. THIS ACTIVITY HAS BEEN FAIRLY PERSISTENT OVER THE PAST DAY OR TWO. IN FACT...A 24-H PRECIP REPORT FROM MONTEGO BAY JAMAICA SHOWS 2.22 IN. HAS FALLEN BETWEEN 8 PM SAT AND 8 PM SUN. THE ERN CARIB REMAINS FAIRLY TRANQUIL UNDER NWLY FLOW AND MODERATE DRY AIR ALOFT. NOT MUCH CHANGE IN THE PATTERN IS EXPECTED OVER THE NEXT DAY OR TWO WITH THE WEAK TROUGH EDGING W STEERED BY THE LOW-LEVEL FLOW. ATLANTIC OCEAN...BROAD UPPER TROUGHING COVERS MUCH OF THE W ATLC ANCHORED BY A VIGOROUS LOW OVER NOVA SCOTIA. THIS UPPER SYSTEM IS SUPPORTING A SFC TROUGH/OLD FRONTAL BOUNDARY WHICH EXTENDS FROM A 1014 MB LOW 250 NM NE OF BERMUDA ALONG 34N60W 25N67W TO HAITI. LOW-LEVEL LIFT ALONG THE BOUNDARY ALONG WITH UPPER DIFFLUENCE BETWEEN THE TROUGH AND RIDGE TO THE E IS PRODUCING SCATTERED SHOWERS WITHIN 150 NM EITHER SIDE OF THE TROUGH AXIS AND N OF 30N BETWEEN 57W-59W. THE SFC FLOW IS QUITE BRISK IN THIS REGION AS A TIGHTENED PRES GRADIENT HAS SET UP BETWEEN THE TROUGH AND HIGH PRES NEAR THE SE CONUS. THIS STRONG FLOW IS ADVECTING SCATTERED SHOWERS ACROSS THE W ATLC WATERS TO THE BAHAMAS AND EXTREME S FLA. HOWEVER...MOISTURE IN THAT AREA IS SIGNIFICANTLY LESS THAN YESTERDAY WHEN UP TO 8 IN OF RAIN FELL IN ISOLATED SPOTS NEAR A STALLED SFC TROUGH.CANGIALOSI