779
AXPQ20 PGUM 100143
TWDPQ
TROPICAL WEATHER DISCUSSION
NATIONAL WEATHER SERVICE TIYAN GU
1143 AM CHST FRI APR 10 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
TROPICAL CYCLONES...
TROPICAL STORM SINLAKU (04W) IS CURRENTLY CENTERED NW OF WENO, CHUUK
NEAR 8.2N 151.2E. SINLAKU IS MOVING NW AT AROUND 3 MPH AS IT SLOWLY
STRENGTHENS. SCATTERED TO WIDESPREAD HEAVY SHOWERS AND ISOLATED
THUNDERSTORMS ARE FOUND WITHIN 155 MILES TO THE S THROUGH NW OF THE
CENTER, WITH SEVERAL BANDS OF NUMEROUS SHOWERS AND ISOLATED
THUNDERSTORMS FOUND TO THE S THROUGH NNW BEYOND 155 MILES. TO THE N
THROUGH S, THERE IS AN OUTER BAND OF NUMEROUS TO WIDESPREAD SHOWERS
BETWEEN 150 TO 400 MILES FROM THE CENTER. TS SINLAKU IS EXPECTED TO
SLOWLY MOVE NW AS IT STRENGTHENS OVER THE NEXT FEW DAYS, POSSIBLY
BECOMING A TYPHOON SATURDAY NIGHT OR SUNDAY. THE LATEST TRACK TAKES
TS SINLAKU TOWARD THE MARIANAS, WITH THE CENTER MOVING OVER S GUAM
AS A CATEGORY 3 TYPHOON.
FOR MORE INFORMATION PLEASE REFER TO BULLETINS FROM THE JOINT
TYPHOON WARNING CENTER UNDER WMO HEADER WTPN31 PGTW AND FROM THE
NATIONAL WEATHER SERVICE UNDER WMO HEADER WTPQ31 PGUM AND WTPQ81
PGUM.
..OTHER WEATHER SYSTEMS
NEAR-EQUATORIAL TROUGH...
THE NEAR-EQUATORIAL TROUGH (NET) STRETCHES ENE ACROSS 130E NEAR 4N
TO TS SINLAKU. THE NET THEN TURNS SE TO BEYOND THE EQUATOR NEAR
160E. PATCHY CLOUDS AND SHOWERS ARE FOUND ALONG THE NET W AND SE OF
SINLAKU. THE NET LOOKS TO DRIFT W OVER THE COMING DAYS AS INVEST 90W
SLOWLY MOVES WNW, WITH LITTLE CHANGE IN INTENSITY.
SURFACE TROUGHS...
A SURFACE TROUGH IS FOUND W TO NW OF PALAU, EXTENDING NW FROM NEAR
7N134E TO BEYOND 130E NEAR 10N. SCATTERED SHOWERS ARE FOUND ALONG
THIS TROUGH, MOSTLY NW OF PALAU. THE TROUGH IS EXPECTED TO CONTINUE
TO MOVE SW OVER THE NEXT COUPLE OF DAYS, POSSIBLY STRENGTHENING AS
IT APPROACHES THE NET, INCREASING CONVECTION SW OF PALAU.
TRADE-WIND TROUGHS...
A WEAK TRADE-WIND TROUGH EXTENDS NNE FROM SSE OF KOSRAE, NEAR 2N164E,
TO END NEAR 9N170E. THIS TROUGH IS INTERACTING WITH A STRENGTHENING
ITCZ TO PRODUCE SCATTERED SHOWERS OVER KWAJALEIN AND MAJURO N TO
AROUND 10N. THIS TROUGH WILL CONTINUE TO MOVE W WITH LITTLE CHANGE
IN INTENSITY, MAINTAINING ENHANCED CONVECTION NEAR OVER THE NORTHERN
MARSHALL ISLANDS
TRADE-WIND SURGE...
A LARGE TRADE-WIND SURGE IS SEEN ACROSS THE REGION AND IS FOUND
MAINLY N OF 12N FROM THE DATE LINE TO NEAR 156E. THIS SURGE IS BEING
PRODUCED BY THE INCREASED PRESSURE GRADIENT BETWEEN A MID-LATITUDE
HIGH PRESSURE SYSTEM AND TS SINLAKU. THE SURGE IS PRODUCING PATCHY
SHOWERS E OF 168E, WITH SCATTERED SHOWERS FOUND FROM S OF WAKE ISLAND
TOWARD SINLAKU. AS THIS HIGH CONTINUES TO MOVE E, THE SURGE WILL
WEAKEN E TOWARD THE DATE LINE. HOWEVER, ANOTHER STRONG MID-LATITUDE
HIGH PRESSURE SYSTEM IS MOVING E OFF OF JAPAN AND IS EXPECTED TO
INTERACT WITH SINLAKU TO PRODUCE ANOTHER TRADE-WIND SURGE N OF 10N,
INCLUDING OVER THE MARIANAS.
..ITCZ
A STRENGTHENING ITCZ IS FOUND OVER THE MARSHALL ISLANDS, NEAR MAJURO
AND KWAJALEIN, EXTENDING WNW ACROSS THE DATE LINE NEAR 6N TO END
NEAR 11N165E. SCATTERED TO NUMEROUS SHOWERS AND ISOLATED
THUNDERSTORMS ARE FOUND ALONG THE ITCZ WITH NUMEROUS TO WIDESPREAD
SHOWERS AND ISOLATED THUNDERSTORMS FOUND ALONG THE ITCZ FROM
KWAJALEIN TO E OF MAJURO. THE ITCZ IS EXPECTED TO REMAIN QUASI-
STATIONARY AS IT STRENGTHENS OVER THE NEXT COUPLE OF DAYS.
KLEESCHULTE
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page