ACPQ70 PGUM 160953 CCC PSHPQ POST TROPICAL CYCLONE REPORT...TROPICAL DEPRESSION 01W (01W) NATIONAL WEATHER SERVICE TIYAN GU 545 PM CHST WED APRIL 3 2019 CORRECTED FOR SITE LOCATIONS AND WIND AND RAIN DATA PRELIMINARY REPORT ON THE EFFECTS OF TROPICAL DEPRESSION 01W IN MICRONESIA FROM 4 TO 22 JANUARY 2019. DURING THE FIRST WEEK OF JANUARY, EQUATORIAL WESTERLIES WERE STILL REACHING THE DATELINE IN AN EL NINO-LIKE PATTERN. SATELLITE IMAGERY ON THE 2ND AND 3RD OF JANUARY SHOWED A DISTURBANCE DEVELOPING IN THE SOUTHERN MARSHALLS WHICH COULD BE SUPPORTED IN CLOSE PROXIMITY OF THE NEAR EQUATORIAL TROUGH ALONG 3N. ALTHOUGH MODERATE SE TO NW UPPER-LEVEL WIND SHEAR SEEMED TO EXIST, A CONCENTRATION OF CONVECTION NEAR THE LLCC WARRANTED A WARNING BY JTWC AT 04JAN21Z. SOON THERE AFTER, THE CONVECTION REFORMED TOWARDS THE NORTH AND NORTHWEST LEAVING IT DIFFICULT TO FOLLOW THE LOW LEVEL CENTER. ALTHOUGH THERE WERE A TOTAL OF 8 WARNINGS BY JTWC (AND ADVISORIES BY PGUM...WITH TS WATCHES ISSUED FOR SEVERAL OF THE ISLANDS IN THE MARSHALLS), POSITIONING ALWAYS HAD LOW CONFIDENCE UNTIL IT BECAME APPARENT ON 06JAN15Z THAT THE LOW LEVEL HAD NOT MOVED MUCH FROM ITS ORIGINAL LOCATION AND ALL WARNING AND ADVISORIES/WATCHES WERE CANCELLED. OVER THE NEXT 20 DAYS PORTIONS OF THE DISTURBANCE, WEAKLY DEFINED BY A BROAD CIRCULATION MOVED WESTWARD THROUGH MICRONESIA. JUST EAST OF PALAU AND YAP, A FLARE-UP CAUSED JTWC TO ISSUE A TCFA, BUT A WARNING WAS NEVER ISSUED. WFO GUAM ISSUED SEVERAL MORE SPECIAL WEATHER STATEMENTS FOR RAIN AND GUSTS DURING THIS TIME TO PALAU AND YAP. THE FINAL REMNANTS OF TD01W MOVED INTO SAMAR IN THE PHILIPPINES AND DISSOLVED WITHIN AN EXISTING SHEAR LINE. A. LOWEST SEA LEVEL PRESSURE/MAXIMUM SUSTAINED WINDS AND PEAK GUSTS --------------------------------------------------------------------- METAR OBSERVATIONS... NOTE: ANEMOMETER HEIGHT IS 10 METERS AND WIND AVERAGING IS 2 MINUTES --------------------------------------------------------------------- LOCATION ID MIN DATE/ MAX DATE/ PEAK DATE/ LAT LON PRES TIME SUST TIME GUST TIME DEG DECIMAL (MB) (UTC) (KT) (UTC) (KT) (UTC) --------------------------------------------------------------------- MAJURO 7.1N 171.2E NO SIGNIFICANT WEATHER (15 TO 20KT) YAP 9.5N 138.1E 15 TO 20KT (23KT, 26MPH GUSTS) 1004.6MB 18 JAN 0650Z (4:50PM CHST) PALAU 7.3N 134.4E 15 TO 20KT (26KT, 30MPH GUSTS) 29.67 INCHES AT 18JAN1850Z (19JAN04:50AM CHST) XMET21 7.2N 134.2E 36024G33KT (28G38MPH) AT 181200Z (10PM CHST) 1003.5MB AT 18/1900Z (APPROX 29.65 INCHES) B. MARINE OBSERVATIONS... --------------------------------------------------------------------- LOCATION ID MIN DATE/ MAX DATE/ PEAK DATE/ LAT LON PRES TIME SUST TIME GUST TIME DEG DECIMAL (MB) (UTC) (KT) (UTC) (KT) (UTC) --------------------------------------------------------------------- NOTHING SIGNIFICANT C. STORM TOTAL RAINFALL --------------------------------------------------------------------- LOCATION ID TIME PERIOD RAINFALL LAT LON (IN) DEG DECIMAL --------------------------------------------------------------------- MAJURO 7.1N 171.2E NOTHING SIGNIFICANT YAP 9.5N 138.1E 9.27 INCHES (17-19 JAN 2019) PALAU 7.3N 134.4E NO REPORTS XMET21 7.2N 134.2 1.5 INCHES (18-19 JAN 2019) D. INLAND FLOODING...COASTAL EROSION REPORTED --------------------- NONE. --------------------------------------------------------------------- E. MAXIMUM STORM SURGE AND STORM TIDE... --------------------------------------------------------------------- LOCATION SURGE TIDE DATE/ BEACH (FT) (FT) TIME EROSION --------------------------------------------------------------------- NONE LIKELY. F. TORNADOES... --------------------------------------------------------------------- LOCATION DATE/ EF SCALE LAT LON (DEG DECIMAL) TIME(UTC) (IF KNOWN) DESCRIPTION --------------------------------------------------------------------- NONE. G. STORM IMPACTS BY ISLAND... --------------------------------------------------------------------- LOCATION DEATHS INJURIES EVACUATIONS DESCRIPTION --------------------------------------------------------------------- MAJURO 7.1N 171.2E NOTHING SIGNIFICANT YAP 9.5N 138.1E NOTHING SIGNIFICANT PALAU 7.3N 134.4E NOTHING SIGNIFICANT H. ADDITIONAL REMARKS... ISSUED BY JTWC: 03JAN0600Z (4PM CHST) LOW 04JAN0500Z (3PM CHST) TCFA 05JAN2100Z (6JAN 7AM CHST) TD 01W (1ST WARNING) 06JAN1500 (7 JAN 1AM CHST) FINAL WARNING FOR TD01W 18JAN0700 (5PM CHST) TCFA 19JAN0700 (5PM CHST) TCFA CANCELLED THE FOLLOW BULLETINS WERE ISSUED BY WFO GUAM TS WATCH AT 04JAN2147Z FOR MILI, MAJURO, ALINGLAPLAP AND KWAJALEIN TS WATCH AT 06JAN0400Z FOR JALUIT ALL TS WATCHES CANCELLED AT 06JAN1443Z 8 - TCP - PUBLIC ADVISORIES 7 - TCP - INTERMEDIATE PUBLIC 8 - HLS - TYPHOON LOCAL STATEMENTS 6 - SPS SPECIAL WEATHER STATEMENTS (2 IN THE MARSHALLS AND 4 FOR YAP AND KOROR) $$ EDSON