268
AXPQ20 PGUM 130014
TWDPQ
TROPICAL WEATHER DISCUSSION
NATIONAL WEATHER SERVICE TIYAN GU
1014 AM CHST FRI MAR 13 2026
TROPICAL WEATHER DISCUSSION FOR THE WESTERN NORTH PACIFIC BETWEEN
THE EQUATOR AND 25N FROM 130E TO 180. THE FOLLOWING INFORMATION IS
BASED ON RECENT SATELLITE IMAGERY/DATA, WEATHER OBSERVATIONS, RADAR,
AND METEOROLOGICAL ANALYSIS.
..SPECIAL FEATURES
NONE.
..OTHER WEATHER SYSTEMS
SURFACE TROUGHS...
A SURFACE TROUGH ENTERS GUAM'S AOR AT EQ130E AND EXTENDS
NORTHEAST TO THE REMNANTS OF TD NURI (03W) LOCATED JUST SOUTHEAST
OF YAP AT 7N138E, WHERE IT TRANSITIONS INTO A SURFACE TROUGH/SHEAR
LINE COMPOSITE. IT THEN CONTINUES NORTHEAST TO ANATAHAN IN THE
CNMI, BEFORE TURNING EAST TO THE REMNANTS OF INVEST 97W AT
17N159E. ALONG AND WITHIN 200 MILES TO THE NORTH OF THE SHEAR
LINE, NUMEROUS SHOWERS ARE OCCURRING. SCATTEROMETER ANALYSIS SHOWS
MAINLY SUSTAINED WINDS OF 15 TO 20 KNOTS HERE, WITH A SMALL
POCKET OF 20 TO 25 KNOTS ON THE WESTERN AND NORTHWESTERN FLANKS OF
THE REMNANTS OF NURI. ALTIMETRY SHOWS NO APPRECIABLE CHANGE IN
SEA HEIGHTS ALONG AND NORTH OF THE SHEAR LINE. THE SHEAR LINE WILL
REMAIN QUASI-STATIONARY THE NEXT FEW DAYS AS IT DISSOLVES.
OTHER SYSTEMS...
ANOTHER REMNANT SHEAR LINE HAS BECOME A LITTLE REINVIGORATED TODAY
WITH SCATTERED SHOWERS DEVELOPING ALONG AND WITHIN 150 MILES TO
THE NORTH OF IT, WITH THIS SHEAR LINE ENTERING GUAM'S AOR AT
11N180. IT THEN STRETCHES WEST-NORTHWEST TO 13N168E (WELL SOUTH OF
WAKE ISLAND), WHERE IT TURNS NORTHWEST AND INTERSECTS THE REMNANTS
OF INVEST 97W AT 17N159E. THE SHOWERS ARE LOCALLY MORE INTENSE
ALONG AND WITHIN 100 MILES NORTH AND EAST OF THIS SMALL PORTION OF
THE SHEAR LINE FROM 160E TO 162E, CENTERED BETWEEN 17N AND 19N.
THIS IS DUE TO ENHANCED SURFACE CONVERGENCE NEAR THE REMNANTS OF
97W. IT REMAINS UNCLEAR IF THIS OLD SHEAR LINE WILL MAINTAIN
ENOUGH RELEVANT CONVERGENCE TO FOSTER SHOWER DEVELOPMENT BEYOND
THE NEXT 24 HOURS.
ANOTHER OLD BUT SOMEWHAT REINVIGORATED SHEAR LINE ENTERS GUAM'S AOR
AT 7N180 AND STRETCHES WEST THROUGH MAJURO BEFORE TURNING WEST-
NORTHWEST AND CONTINUING TO GUAM, WHERE IT ENDS. THE SHOWERS ALONG
AND NORTH OF THIS WEAKER SHEAR LINE REMNANT ARE MORE WIDELY-
SCATTERED THEN ITS PREDECESSOR TO THE NORTH. STILL, THEY ARE
OCCURRING ALONG AND WITHIN 100 MILES TO ITS NORTH. HERE TOO IT
REMAINS UNCLEAR IF THIS FEATURE WILL LAST BEYOND 24 HOURS.
DOLL
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