Tropical Weather Discussion
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000
AXPZ20 KNHC 230905
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC THU OCT 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0900 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

MONSOON TROUGH 14N92W TO 10N120W TO 09N140W. SCATTERED MODERATE
ISOLATED STRONG CONVECTION FROM 6N-14N BETWEEN 91W-97W.
SCATTERED MODERATE TO STRONG CONVECTION FROM 7N-11N BETWEEN 119W
AND 128W.

...DISCUSSION...

AN UPPER LEVEL RIDGE IS OVER THE FAR NW CORNER OF THE DISCUSSION
AREA WITH AXIS FROM 30N1350W TO 28N140W. DOWNSTREAM SMALL
CYCLONIC CIRCULATION IS CENTERED NEAR 27N132W WITH AN
ANTICYCLONIC CIRCULATION TO THE E AT 29N124W. A SHARP UPPER
LEVEL TROUGH EXTENDS FROM SW TEXAS ACROSS NORTHERN MEXICO
THROUGH CENTRAL BAJA CALIFORNIA TO 24N121W. MODERATE TO STRONG
SUBSIDENCE WITH DRY AND STABLE AIR AT THE MIDDLE AND UPPER
LEVELS IS N OF 20N W OF 105W. UPPER LEVEL DIFFLUENCE IS
ENHANCING CONVECTION FROM 7N-11N BETWEEN 119W AND 128W.

A 1021 MB SURFACE HIGH PRES CENTERED NEAR 31N133W WILL MOVE E
AND WEAKEN AS A COLD FRONT APPROACHES THE THE NW PORTION OF THE
AREA AND WILL EXTEND FROM 32N128W TO 24N140W SAT. LARGE SWELL TO
12 FT WILL MOVE INTO THE AREA W OF THE FRONT.

HIGH PRES WILL BUILD ACROSS SOUTHERN MEXICO FRI RESULTING IN
TIGHTENING THE PRES GRADIENT WITH WINDS INCREASING TO 20-25 KT
THROUGH THE GULF OF TEHUANTEPEC FRI. THE WINDS WILL INCREASE TO
20-30 KT SAT WITH SEAS BUILDING TO 8-12 FT.

$$
DGS



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