000
AXPZ20 KNHC 030915
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC SAT APR 03 2010

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. 

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.

...ITCZ...
AXIS IS ALONG 5N77W 6N95W 4N105W 5N120W 4N140W. SCATTERED 
MODERATE TO STRONG CONVECTION WITHIN 60 NM S OF AXIS FROM 
83W-92W. SCATTERED MODERATE ISOLATED STRONG CONVECTION WITHIN 
120 NM S OF AXIS FROM 120W-131W AND FROM 1N-6W BETWEEN 136W-140W.

...DISCUSSION...
UPPER LEVEL RIDGE OVER THE FAR NW PORTION OF THE DISCUSSION AREA
WITH AXIS FROM 32N133W TO 17N140W. MODERATE TO STRONG SUBSIDENCE
WITH DRY STABLE AIR IS FROM 15N-30N W OF 125W...WITH SOME HIGH
LEVEL MOISTURE MOVING ACROSS THE N PORTION OF THE RIDGE. 
DOWNSTREAM TROUGH EXTENDS FROM THE SW U.S. ACROSS CENTRAL BAJA 
CALIFORNIA TO 15N135W. A 95 KT JET STREAM IS AT THE BASE OF THE 
TROUGH FROM 13N136W TO 15N127W. SW FLOW E OF THE TROUGH IS 
ADVECTING ABUNDANT TROPICAL MOISTURE AND ITCZ CONVECTIVE DEBRIS 
CLOUDS AT MID AND UPPER LEVELS ACROSS CENTRAL MEXICO. IN THE 
DEEP TROPICS AN UPPER LEVEL ANTICYCLONIC CIRCULATION IS CENTERED 
NEAR 7N104W. AN UPPER LEVEL TROUGH SEPARATES THE ANTICYCLONIC 
CIRCULATION FROM ANOTHER ANTICYCLONIC CIRCULATION OFF THE COAST 
OF PANAMA NEAR 7N83W. STRONG SUBSIDENCE IS N OF THE ITCZ E OF 
100W.

SURFACE HIGH PRES RIDGE COVERS THE AREA N OF 10N W OF 105W. THE 
PRES GRADIENT IS TIGHT ENOUGH WTIH THE RIDGE TO PRODUCE 20-25 KT 
TRADE WINDS FROM 7N-23N W 120W. NLY WINDS ALONG STHE COAST OF
BAJA CALIFORNIA WILL DECREASE TO BELOW 20 KT SUN MORNING. LARGE 
NW SWELLS W OF 100W WILL SLOWLY SUBSIDE.

THREE TROUGHS ARE ANALYZED ALONG THE ITCZ. TROUGH FROM 8N95W TO 
3N97W. SCATTERED SHOWERS AND ISOLATED TSTMS ARE WITHIN 50 NM 
EITHER SIDE OF THE TROUGH. SECOND TROUGH EXTENDS FROM 9N1116W TO 
3N118W. ISOLATED SHOWERS ARE ALONG THE TROUGH AXIS. ANOTHER 
TROUGH EXTENDS FROM 9N137W TO 1N139W. SCATTERED MODERATE TO 
STRONG CONVECTION ASSOCIATED WITH THE TROUGH AND THE ITCZ FROM 
1N-6N BETWEEN 136W-140W.

FOR ADDITIONAL INFORMATION PLEASE VISIT 
HTTP://WWW.HURRICANES.GOV/MARINE

$$
DGS