000 AXPZ20 KNHC 270916 TWDEP TROPICAL WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 1005 UTC WED FEB 27 2013 TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL ANALYSIS. BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 0900 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... MONSOON TROUGH FROM 6N77W TO 5N90W TO 3N102W. ITCZ FROM 3N102W TO 7N125W TO 6N140W. SCATTERED MODERATE ISOLATED STRONG CONVECTION WITHIN 90 NM N OF AXIS FROM 127W-130W. ...DISCUSSION... NEARLY STATIONARY UPPER LEVEL TROUGH OVER THE FAR NW PORTION OF THE DISCUSSION AREA WITH AXIS FROM 32N130W SW TO 24N140W. A BROAD FLAT UPPER LEVEL RIDGE IS E OF THE TROUGH N OF 20N BETWEEN 110W AND 130W. A 105-115 KT JETSTREAM ENTERS THE AREA AT 20N140W TO 29N125W WHERE WINDS INCREASE TO 125-140 KT THEN INTO NORTHERN BAJA CALIFORNIA. A DENSE LAYER OF MIDDLE AND UPPER LEVEL CLOUDS ARE WITHIN 660 NM S OF THE JET. IN THE DEEP TROPICS AN UPPER LEVEL TROUGH EXTENDS FROM 10N120W SE TO 2N105W. MODERATE TO STRONG SUBSIDENCE WITH DRY AND STABLE AIR AT THE MIDDLE AND UPPER LEVELS IS FROM 5N-15N E OF 110W. SURFACE RIDGE IS N OF 15N W OF 115W. THE PRES GRADIENT ALONG THE SOUTHERN PERIPHERY OF THE RIDGE IS STRONG ENOUGH TO SUPPORT ELY 20-25 KT WINDS FROM 9N-12N W OF 130W. THE RIDGE IS FORECAST TO STRENGTHEN SOME THU WITH AN INCREASE IN THE COVERAGE OF THE 20-25 KT WINDS...STRETCHING FROM 12N-25N W OF 130W. NLY WIND 20-25 KT CONTINUE TO BLOW THROUGH THE GULF OF CALIFORNIA AND ARE FORECAST TO CONTINUE THROUGH FRI. STRONG HIGH PRES BUILDING SOUTHWARD BEHIND A COLD FRONT MOVING THROUGH THE GULF OF MEXICO WILL TIGHTEN THE PRES GRADIENT ACROSS SOUTHERN MEXICO. AS A RESULT NLY WIND INCREASE TO 20-25 KT IN THE GULF OF TEHUANTEPEC THU. THE GRADIENT MAY TIGHTEN EVEN FURTHER OVER THE WEEKEND AND THERE IS A POSSIBILITY OF GALE FORCE WINDS THROUGH THE GULF OF TEHUANTEPEC BY SAT. $$ DGS