000WTPZ42 KNHC 161538TCDEP2TROPICAL DEPRESSION TWO-E SPECIAL DISCUSSION NUMBER 1NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL EP022010830 AM PDT WED JUN 16 2010VISIBLE SATELLITE IMAGES AND AN SSMIS MICROWAVE PASS AT 1209 UTCINDICATE THAT THE LOW PRESSURE SYSTEM THAT HAS PERSISTED NEAR THEGULF OF TEHUANTEPEC FOR THE LAST DAY OR TWO HAS BECOME BETTERORGANIZED. GIVEN THE PERSISTENCE OF DEEP CONVECTION NEAR THECIRCULATION CENTER FOR 12-18 HOURS...THE TAFB CLASSIFICATION OFT1.5 AND AN IMPROVED DEFINITION OF THE CIRCULATION...ADVISORIES AREBEING INITIATED ON TROPICAL DEPRESSION TWO-E.THE DEPRESSION IS EMBEDDED IN A MONSOON-LIKE ENVIRONMENT DOMINATEDBY A BROAD WESTERLY FLOW IN THE LOW- TO MID-LEVELS AND A EASTERLYFLOW ALOFT. THIS PATTERN YIELDS A SLOW DEEP LAYER MEAN FLOW... ANDHELPS TO EXPLAIN WHY THE CYCLONE HAS MOVED LITTLE. THIS IS BORNEOUT IN RECENT CENTER FIXES WHICH GIVE LITTLE MOTION...AND THEINITIAL MOTION ESTIMATE IS STATIONARY. OVER THE NEXT FEW DAYS...GLOBAL MODELS SHOW A BROAD SUBTROPICAL RIDGE EXTENDING FROM FLORIDAINTO THE WESTERN GULF BUILDING WESTWARD WHICH SHOULD STEER THEDEPRESSION ON A WEST-NORTHWESTWARD COURSE WITH SOME INCREASE INFORWARD SPEED BEYOND 72 HOURS. HOWEVER...THIS FORECAST IS OF LOWCONFIDENCE GIVEN THE UNCERTAIN INTERACTION OF THE DEPRESSION WITH ATROPICAL DISTURBANCE TO THE WEST.THE APPEARANCE OF THE DEPRESSION SUGGESTS THAT IT IS SUBJECT TOMODERATE EASTERLY SHEAR...BUT SHIPS MODEL OUTPUT SUGGESTS THAT THESHEAR IS LIGHT. THE SHIPS GUIDANCE MAY BE UNDERESTIMATING THESTRENGTH OF THE SHEAR...AND THE OFFICIAL FORECAST FAVORS THE LOWERLGEM GUIDANCE. FORECAST POSITIONS AND MAX WINDSINITIAL 16/1530Z 14.8N 95.6W 25 KT 12HR VT 17/0000Z 14.8N 96.2W 30 KT 24HR VT 17/1200Z 15.0N 97.1W 30 KT 36HR VT 18/0000Z 15.2N 98.0W 35 KT 48HR VT 18/1200Z 15.5N 99.3W 40 KT 72HR VT 19/1200Z 15.9N 101.2W 45 KT 96HR VT 20/1200Z 16.0N 103.5W 45 KT120HR VT 21/1200Z 16.5N 106.5W 45 KT$$FORECASTER KIMBERLAIN/BROWN
000WTPZ42 KNHC 162036TCDEP2TROPICAL DEPRESSION TWO-E DISCUSSION NUMBER 2NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL EP022010200 PM PDT WED JUN 16 2010VISIBLE SATELLITE IMAGERY SHOWS THAT THE DEPRESSION HAS CHANGEDLITTLE IN ORGANIZATION SINCE THIS MORNING. THE LOW-LEVEL CENTERIS NEAR THE NORTHEASTERN EDGE OF A PULSATING MASS OF DEEPCONVECTION. SATELLITE CLASSIFICATIONS REMAIN UNCHANGED AND ARECENT ASCAT PASS SUPPORTS MAINTAINING THE 25-KT INITIAL INTENSITY. IT APPEARS THAT THE DEPRESSION HAS BEEN MOVING SLOWLY NORTHWESTWARDOR 310/3 OVER THE PAST 6-12 HOURS. THE TRACK FORECAST REMAINSHIGHLY UNCERTAIN AS THE GUIDANCE MODELS ARE IN POOR AGREEMENT. THEMODELS SHOW VARYING SCENARIOS DEPENDING ON HOW THE SYSTEM INTERACTSWITH THE LOW PRESSURE AREA TO THE WEST AND A TROPICAL WAVE TO THEEAST. THE UKMET MODEL...WHICH MAINTAINS THE DEPRESSION AS ASEPARATE SYSTEM...TAKES THE CYCLONE GENERALLY WESTWARD WHILE AMID-LEVEL RIDGE BUILDS OVER THE GULF OF MEXICO AND NORTHERN MEXICO. THE OFFICIAL FORECAST FOLLOWS THIS REASONING AND IS CLOSE TO THEPREVIOUS NHC FORECAST TRACK. IT SHOULD BE NOTED THAT ANY DEVIATIONOF THE CENTER TO THE NORTH OF THE FORECAST TRACK WOULD BRING THECENTER ONSHORE IN SOUTHERN MEXICO.THE SHIPS GUIDANCE SUGGESTS THAT THE DEPRESSION WILL BE IN A LOWSHEAR ENVIRONMENT DURING THE NEXT SEVERAL DAYS. HOWEVER...THECURRENT SATELLITE APPEARANCE OF THE DEPRESSION SUGGESTS THAT THENORTHEASTERLY SHEAR MIGHT NOT BE SO FAVORABLE. AS A RESULT...THEINTENSITY FORECAST WILL REMAIN A LITTLE BELOW THIS GUIDANCE...ESPECIALLY BEYOND 36 HOURS.FORECAST POSITIONS AND MAX WINDSINITIAL 16/2100Z 15.0N 95.8W 25 KT 12HR VT 17/0600Z 15.1N 96.7W 30 KT 24HR VT 17/1800Z 15.3N 97.6W 35 KT 36HR VT 18/0600Z 15.5N 98.6W 40 KT 48HR VT 18/1800Z 15.7N 99.6W 45 KT 72HR VT 19/1800Z 16.0N 101.5W 45 KT 96HR VT 20/1800Z 16.3N 104.0W 50 KT120HR VT 21/1800Z 16.5N 107.0W 50 KT$$FORECASTER BROWN/KIMBERLAIN
aunque está previsto que bajará la cizalla...el aire seco se la va a comer