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920 
AXPZ20 KNHC 231529
TWDEP 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL                       
1605 UTC WED JUL 23 2014

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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1500 UTC.

....SPECIAL FEATURES...                                         
A 1008 MB LOW IS CENTERED NEAR 11N125W MOVING W 15 KT. NUMEROUS 
STRONG WITHIN 150 NM OF LOW OVER NE QUADRANT. ENVIRONMENTAL 
CONDITIONS APPEAR CONDUCIVE FOR ADDITIONAL DEVELOPMENT AND THIS 
SYSTEM IS EXPECTED TO BECOME A TROPICAL DEPRESSION DURING THE 
NEXT FEW DAYS AS IT MOVES W OR W-NW 9 TO 13 KT. THERE IS A HIGH 
CHANCE OF THE SYSTEM DEVELOPING INTO A TROPICAL CYCLONE OVER THE 
NEXT 48 HOURS.

...TROPICAL WAVES...                                           
TROPICAL WAVE EXTENDS FROM 9N88W N TO INLAND OVER CENTRAL 
AMERICA MOVING W 15 TO 20 KT. ALTHOUGH THIS WAVE IS EMBEDDED 
WITHIN AN AREA OF DEEP MOISTURE...THERE IS NO ASSOCIATED DEEP 
CONVECTION WITH THE WAVE. 

TROPICAL WAVE EXTEND N OF 8N ALONG 100W MOVING W 10 TO 15 KT. 
SCATTERED MODERATE TO STRONG CONVECTION ALONG THE S PORTION OF 
THE WAVE IS MAINLY ASSOCIATED WITH THE ITCZ.

TROPICAL WAVE EXTENDS FROM 9N-17N ALONG 113W MOVING W 10-15 KT. 
ALTHOUGH THERE IS NO SIGNIFICANT CONVECTION WITH THE WAVE...IT 
WELL DEFINED IN THE LOW CLOUDS.

TROPICAL WAVE EXTENDS FROM 11N127W TO 18N128W MOVING W 15 KT. 
THE 1008 MB SURFACE LOW IN THE SPECIAL FEATURES IS APPROACHING  
THE AREA OF THIS WAVE. NO ASSOCIATED DEEP CONVECTION. 

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...            
MONSOON TROUGH FROM 8N78W TO 8N95W. ITCZ FROM 8N95W TO 1008 MB 
LOW 11N125W. MONSOON TROUGH FROM 11N125W TO 1009 MB LOW 9N138W. 
SCATTERED MODERATE TO STRONG CONVECTION WITHIN 120 NM S OF AXIS 
FROM 80W-82W AND FROM 5N-14N BETWEEN 93W-110W AND WITHIN 180 NM 
S OF AXIS FROM 110W-120W AND FROM 7N-14N BETWEEN 120W-140W.

...DISCUSSION...                                                
AN UPPER LEVEL TROUGH IS ACROSS THE NORTHERN PORTION OF THE 
DISCUSSION AREA WITH THE AXIS EXTENDING FROM A CYCLONIC 
CIRCULATION 30N130W TO 20N135W. MODERATE SUBSIDENCE WITH DRY AND 
STABLE AIR AT THE MIDDLE AND UPPER LEVELS IS OVER THE AREA N OF 
20N W OF 120W. UPPER LEVEL DIFFLUENT FLOW IS ENHANCING 
WIDESPREAD CONVECTION ALONG NEARLY THE ENTIRE LENGTH OF THE 
ITCZ. A LARGE UPPER ANTICYCLONIC CIRCULATION IS CENTERED OVER SW 
NEW MEXICO NEAR 32N107W WITH ASSOCIATED UPPER RIDGE EXTENDING 
FROM THE ANTICYCLONE INTO THE E PACIFIC TO 23N120W. A SMALL 
UPPER CYCLONIC CIRCULATION IS CENTERED JUST S OF THE UPPER RIDGE 
NEAR 19N115W. 

GULF OF PAPAGAYO...GALE FORCE TRADE WINDS OVER THE SW CARIBBEAN 
WILL CONTINUE STRONG WINDS THROUGH THE GULF OF PAPAGAYO. THE 
WINDS WILL BE 20-25 KT WITH SEAS TO 9 FT...HOWEVER AREA OF 
STRONG WINDS WILL DECREASE IN COVERAGE AS THE WINDS IN THE 
CARIBBEAN DECREASE TO BELOW GALE FORCE.
 
GULF OF TEHUANTEPEC...THE PRESSURE GRADIENT HAS TIGHTENED ACROSS 
SOUTHERN MEXICO WITH NLY WINDS 20-25 KT BLOWING THROUGH THE GULF 
OF TEHUANTEPEC. THE WINDS ARE FORECAST TO DECREASE TO 20 KT LESS 
AND SEAS SUBSIDE TO LESS THAN 8 FT THU AFTERNOON.

OTHERWISE A SURFACE RIDGE DOMINATES THE REMAINDER OF THE AREA N 
OF 15N W OF 115W WITH WINDS 15 KT OR LESS.

$$ 
DGS




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