Post Storm Hurricane Report
Issued by NWS Tiyan, Guam

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POST TROPICAL CYCLONE REPORT...TYPHOON MALAKAS (02W)
NATIONAL WEATHER SERVICE TIYAN GU
300 PM CHST FRI MAY 6 2022

PRELIMINARY REPORT ON THE EFFECTS OF TYPHOON MALAKAS (02W) IN
MICRONESIA FROM 7 TO 15 APRIL 2022.

THE DISTURBANCE THAT WOULD EVENTUALLY DEVELOP INTO TYPHOON MALAKAS
ORIGINATED IN EASTERN MICRONESIA 2-3 APRIL AS A WESTWARD MOVING
TROUGH PASSING THROUGH KOSRAE AND POHNPEI STATES. SOUTH OF THIS
DISTURBANCE WAS THE EASTERNMOST EXTENT OF A BAND OF EQUATORIAL
WESTERLIES EXTENDING FROM SOUTH OF PALAU. THIS SYSTEM PRODUCED HEAVY
SHOWERS ACROSS THE TWO STATES WITH POHNPEI RECORDING NEARLY 5 INCHES
OF RAIN IN A 6 HOUR PERIOD ON 3 APRIL. THE JOINT TYPHOON WARNING
CENTER (JTWC) FIRST OPENED AN INVEST ON THIS DISTURBANCE...DUBBED
95W...AROUND 02APR/18Z AS IT SAT SOUTH-SOUTHEAST OF POHNPEI NEAR
5N160E. ALTHOUGH THIS DISTURBANCE EXHIBITED FLARING CONVECTION
AROUND A POORLY-ORGANIZED CENTER...MODELS...PARTICULARLY THE
GFS...CONTINUED TO INDICATE GRADUAL DEVELOPMENT AND AN EVENTUAL
TROPICAL CYCLONE IN THE COMING DAYS AS IT MOVED THROUGH CHUUK AND
YAP STATES. THE 03APR/10Z SCATTEROMETER PASS SHOWED A DISCERNIBLE
LOW-LEVEL CIRCULATION CENTER SOUTH-SOUTHWEST OF POHNPEI. DESPITE
THIS AND THE PERSISTENT BAND OF WESTERLIES ALONG THE EQUATOR...
INCREASING VERTICAL WIND SHEAR CAUSED 95W TO WEAKEN. AS A RESULT...
THE JTWC LOWERED 95W FROM A MEDIUM TO A LOW ON 04APR/06Z.
ENVIRONMENTAL CONDITIONS REMAINED UNFAVORABLE FOR DEVELOPMENT AS 95W
ENTERED SOUTHERN CHUUK STATE AND COMPUTER MODELS BACKED OFF ON ITS
DEVELOPMENT WITH ONLY THE GFS STILL INDICATING A TROPICAL CYCLONE IN
THE ENSUING 2-3 DAYS. BY 6 APR...CONDITIONS BEGAN TO IMPROVE WITH
SCATTEROMETER DATA INDICATING A MORE COHERENT CIRCULATION AS
VERTICAL WIND SHEAR DECREASED. DEEPENING CONVECTION ALSO SUGGESTED
ORGANIZATIONAL IMPROVEMENT WAS AT HAND. SOON AFTER...AT 06APR/15Z...
THE JTWC ISSUED A TROPICAL CYCLONE FORMATION ALERT WITH 95W CENTERED
NEAR 4N148E...SOUTHWEST OF CHUUK. THE FIRST JTWC WARNING FOR
TROPICAL DEPRESSION 02W WAS ISSUED THE NEXT DAY AT 07APR/03Z AND
CALLED FOR GRADUAL INTENSIFICATION AS 02W HEADED NORTHWEST THROUGH
CENTRAL YAP STATE. HOWEVER...THE INTENSITY OF 02W REMAINED STEADY-
STATE AS CONVECTION MAINTAINED A DIURNAL FLARING CYCLE AND THE
CENTER REMAINED ELONGATED IN LINE WITH THE TROUGH AXIS THAT LINKED
02W TO A PAIR OF WEAK CIRCULATIONS NEAR YAP AND PALAU...AND INVEST
94W...NEAR THE PHILIPPINES. ON 7 APRIL...SCATTEROMETER DATA SHOWED
INCREASING WINDS IN ALL QUADRANTS AROUND THE NEWLY-UPGRADED TROPICAL
STORM 02W. BETWEEN 8-9 APRIL...AS TS 02W EVENTUALLY RECEIVED THE
NAME MALAKAS AND TURNED TO THE NORTHWEST TOWARD WOLEAI...CENTRAL
CONVECTION REMAINED INCONSISTENT AND THE INTENSITY PLATEAUED AT 40-
45 KT. THROUGH MUCH OF 9 APRIL...THE LOW-LEVEL CIRCULATION CENTER OF
MALAKAS WAS PLAINLY VISIBLE IN SATELLITE IMAGERY...BUT BY MIDDAY...A
PLUME OF DEEP CONVECTION BEGAN AND CONTINUED INTO THE OVERNIGHT
HOURS... SIGNALING THAT LONG-AWAITED EXPECTATION OF DEVELOPMENT. AT
THIS POINT MALAKAS WAS ALREADY NORTHWEST OF WOLEAI AND HEADED TOWARD
FAIS WHILE INTENSIFYING. MALAKAS PASSED FAIS ON 10 APRIL AND
CONTINUED NORTHWESTWARD INTO THE PHILIPPINE SEA. SLOWER TO INTENSIFY
THAN EARLIER FORECAST...MALAKAS EVENTUALLY REACHED TYPHOON STATUS
AROUND 11APR/15Z...WELL NORTH-NORTHWEST OF YAP NEAR 15N136E. ON 13
APRIL...MALAKAS REACHED AND HELD ITS PEAK INTENSITY OF 115
KT...CATEGORY 4...FOR ABOUT 12 HOURS BEFORE BEGINNING A WEAKENING
TREND AS IT CURVED NORTH-NORTHEAST AND BEGAN ITS EXTRA-TROPICAL
TRANSITION.

DUE TO THE PROXIMITY OF ISLANDS IN YAP STATE AND THE UNCERTAINTY OF
MOTION OF NEWLY-FORMED TROPICAL DEPRESSION 02W...TROPICAL STORM
WATCHES WERE QUICKLY ISSUED FOR THE ISLANDS OF SATAWAL...WOLEAI...
AND FARAULEP IN THE FIRST NWS GUAM PUBLIC ADVISORY ON 02W. THE NEXT
DAY...18-24 HOURS LATER AND FOLLOWING SOME BOBBLING IN THE MOTION OF
02W...TROPICAL STORM WARNINGS WERE ISSUED FOR THE SAME 3 ISLANDS
WITH TYPHOON WATCHES ISSUED FOR FAIS...ULITHI...AND YAP. WITH
MALAKAS MAINTAINING A GENERALLY NORTHWEST MOTION AND FAILING TO
INTENSIFY...THE TYPHOON WATCH WAS NEVER UPGRADED TO A WARNING BUT
TROPICAL STORM WARNINGS WERE ISSUED FOR FAIS AND ULITHI ON 9 APRIL.
HIMAWARI-8 SATELLITE IMAGERY SHOWED THAT MALAKAS PASSED NEARLY
OVERHEAD WOLEAI AROUND 09APR/03Z WITH ESTIMATED MAXIMUM SUSTAINED
WINDS OF 40 KT. MALAKAS CONTINUED NORTHWEST...EVENTUALLY PASSING
JUST NORTHEAST OF FAIS AND ULITHI AROUND 10APR/00Z. AFTER ITS
PASSAGE...REMAINING TROPICAL CYCLONE WATCHES AND WARNINGS WERE
CANCELLED. FOR YAP... DESPITE A CPA OF ONLY 180 MILES...THE DIRECT
WIND AND RAIN EFFECTS OF MALAKAS WERE MINIMAL...BUT THE ENSUING
SOUTHWESTERLY MONSOON FLOW BROUGHT STRONGER WINDS AND GUSTS ALONG
WITH PERIODS OF HEAVY RAINFALL THE FOLLOWING 2 DAYS.

ONE INJURY WAS NOTED FROM WOTTEGAI ISLAND IN WOLEAI ATOLL DUE TO A
FALLING OBJECT. MALAKAS DAMAGE REPORTS OUT OF YAP STATE SHOWED A
RANGE OF IMPACTS WITH WEAKER VEGETATION...BANANAS AND
BREADFRUIT...BEING THE WORST AFFECTED...ESPECIALLY ACROSS
WOLEAI...ULITHI AND FAIS WHICH WERE CLOSEST TO THE STORM CENTER AND
SUBJECTED TO THE OCCASIONAL TORRENTIAL DOWNPOURS AND STRONG GUSTS.
ADDITIONALLY...TARO AND YAM PATCHES WERE NOTED TO HAVE FLOODED...
SOME WITH SALT WATER INTRUSION...ON MOST ISLANDS IN CENTRAL YAP
STATE. STRUCTURAL DAMAGE WAS MINOR FOR MOST LOCATIONS. EAURIPIK AND
MOGMOG ISLANDS REPORTED DAMAGE TO THEIR SEA WALLS. MOST ISLANDS IN
YAP STATE ALSO REPORTED MODERATE TO MAJOR EROSION ALONG MOST...IF
NOT ALL...SHORELINES.

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     MAX      DATE/     PEAK    DATE/    MIN      DATE/
LAT  LON         SUST     TIME      GUST    TIME     SLP      TIME
DEG DECIMAL               (UTC)             (UTC)    (MB)     (UTC)
---------------------------------------------------------------------
YAP (PTYA)       14KT     09APR/    22KT    10APR/  999.6     10APR/
9.5N 138.1E    (16MPH)     2250    (25MPH)   0251              0452

         NOTE...STRONGER WINDS AND GUSTS WERE RECORDED IN THE 24-48
                HOURS AFTER CPA AS SOUTHWESTERLY MONSOONAL FLOW
                INTENSIFIED ACROSS THE REGION. WIND GUSTS PEAKED AT
                32KT (37MPH) AROUND 10APR/2300UTC.

WOLEAI SYNOP     21KT     09APR/            1010.8     09APR/
 7.4N 143.9E   (24MPH)     0600                      0600

ULITHI SYNOP     28KT     10APR/           1001.2     10APR/
10.0N 139.8E   (32MPH)     0000                 0000-0600

THE FOLLOWING WIND DETAILS ARE ESTIMATED MAXIMUM SUSTAINED WINDS
BASED ON SCATTEROMETER DATA

WOLEAI          30-40KT      AROUND 08APR/1200
 7.4N 143.9E    35-45MPH

FARAULEP        30-40KT      AROUND 09APR/0000
 8.6N 144.5E    35-45MPH

FAIS            35-45KT      AROUND 09APR/1800
 9.8N 140.5E    40-50MPH

ULITHI          35-45KT      AROUND 10APR/0000
10.0N 139.8E    40-50MPH

B. MARINE OBSERVATIONS...
NOTE: ANEMOMETER HEIGHT IN METERS AND WIND AVERAGING PERIOD IN
MINUTES INDICATED UNDER MAXIMUM SUSTAINED WIND IF KNOWN
---------------------------------------------------------------------
LOCATION  ID    MIN    DATE/     MAX      DATE/     PEAK    DATE/
LAT  LON        PRES   TIME      SUST     TIME      GUST    TIME
DEG DECIMAL     (MB)   (UTC)     (KT)     (UTC)     (KT)    (UTC)
---------------------------------------------------------------------
NO DATA.

C. STORM TOTAL RAINFALL
---------------------------------------------------------------------
LOCATION ID                                   RAINFALL
LAT LON           TIME PERIOD                   (IN)
DEG DECIMAL
---------------------------------------------------------------------
YAP (PTYA)        09APR/12Z - 10APR/12Z         0.12 (CPA ~10APR/00)
9.5N 138.1E
                  NOTE...WIDESPREAD HEAVY RAINS FELL WITHIN THE 24-48
                  HOURS AFTER CPA AS WET MONSOON MOISTURE PASSED OVER
                  THE AREA.
                  09APR/12Z - 11APR/12Z         4.16   (48HR)
                  09APR/12Z - 12APR/12Z         5.40   (72HR)

ULITHI SYNOP  09APR/00Z - 11APR/00Z        7.37   (48HR)
10.0N 139.8E                       (CPA ~10/02Z)

WOLEAI SYNOP  07APR/00Z - 10APR/00Z    5.62   (72HR)
7.4N 143.9E                        (CPA ~09/03Z)

REMARKS: RAINFALL AMOUNTS FOR ULITHI WERE SUMMATED FROM
AMOUNTS PULLED FROM SYNOPTIC OBSERVATIONS AND WXCODER DATA.

D. INLAND FLOODING...
---------------------------------------------------------------------
NONE REPORTED.

E. MAXIMUM STORM SURGE AND STORM TIDE...
---------------------------------------------------------------------
LOCATION                      SURGE   TIDE   DATE/   BEACH
                              (FT)    (FT)   TIME    EROSION
---------------------------------------------------------------------
NO SIGNIFICANT IMPACTS REPORTED...HOWEVER MODERATE TO MAJOR COASTAL
EROSION WAS REPORTED ALONG MOST...IF NOT ALL...SHORES OF CENTRAL
YAP STATE ISLANDS.

THE BELOW ARE SATELLITE ALTIMETER-BASED MAX COMBINED SEA HEIGHTS FOR
VARIOUS ISLANDS WITHIN YAP STATE AS MALAKAS PASSED NEARBY...
WOLEAI      10-13 FEET
FARAULEP    10-13 FEET
FAIS        12-15 FEET
ULITHI      11-14 FEET
YAP         10-13 FEET

F. TORNADOES...
---------------------------------------------------------------------
LOCATION                        DATE/         EF SCALE
LAT LON (DEG DECIMAL)           TIME(UTC)    (IF KNOWN)
DESCRIPTION
---------------------------------------------------------------------
NONE REPORTED.

G. STORM IMPACTS BY ISLAND...
---------------------------------------------------------------------
LOCATION           DEATHS           INJURIES          EVACUATIONS
DESCRIPTION
---------------------------------------------------------------------
WOLEAI              NONE               1               NONE KNOWN
FARAULEP            NONE           NONE KNOWN          NONE KNOWN
SATAWAL             NONE           NONE KNOWN          NONE KNOWN
FAIS                NONE           NONE KNOWN          NONE KNOWN
ULITHI              NONE           NONE KNOWN          NONE KNOWN
YAP                 NONE           NONE KNOWN          NONE KNOWN

REMARKS: YAP STATE OFFICIALS NOTED THE DOWNING OF BANANA AND
BREADFRUIT TREES ON SEVERAL ISLANDS AND THE FLOODING OF TARO PATCHES
MOST ISLANDS. ADDITIONALLY...MINOR STRUCTURAL DAMAGE WAS NOTED
AT MOST ISLANDS...INCLUDING SEA WALLS ON EAURIPIK AND MOGMOG ISLANDS.

H. REMARKS...

APPROXIMATE CLOSEST POINTS OF APPROACH FOR ISLANDS THAT HAD TC
WATCHES OR WARNINGS ISSUED BASED ON JTWC BULLETINS AND SATELLITE
IMAGERY

ISLAND      DATE/TIME (UTC)    DISTANCE    BEARING   STORM INTENSITY
--------------------------------------------------------------------
WOLEAI        09APR/0300             OVERHEAD           TS 45 MPH
FARAULEP      09APR/0600         80 MI       SW         TS 45 MPH
SATAWAL       08APR/1500        125 MI       WSW        TS 45 MPH
FAIS          09APR/2300         65 MI       NE         TS 65 MPH
ULITHI        10APR/0200         90 MI       NE         TS 65 MPH
YAP           10APR/0000        180 MI       ENE        TS 65 MPH

THE FOLLOW BULLETINS WERE ISSUED BY WFO GUAM

  32 - TC PUBLIC ADVISORIES (TCP)...BETWEEN 7 APR  15 APR
  12 - TC INTERMEDIATE PUBLIC ADVISORIES
  14 - HLS TYPHOON LOCAL STATEMENTS
  10  ADDITIONAL PUBLIC AND MARINE FORECASTS (ISSUED EVERY 6 HOURS)
   2 - SPS SPECIAL WEATHER STATEMENTS FOR WEST MICRONESIA
   1 - SPS SPECIAL WEATHER STATEMENTS FOR EAST MICRONESIA
   5 - ESF HYDROLOGIC OUTLOOKS FOR MARIANAS
   8 - WRN-DSS WEATHER ALERTS VIA EMAIL TO GOVT PARTNERS AND PUBLIC

TROPICAL CYCLONE WATCH AND WARNING ISSUANCES
07APR/0400 UTC      TS WATCH        SATAWAL...WOLEAI...FARAULEP
07APR/2200 UTC      TS WARNING      WOLEAI...FARAULEP
                    TY WATCH        FAIS...ULITHI...YAP
08APR/0400 UTC      TS WARNING      SATAWAL
08APR/1900 UTC      CANC TS WARN    SATAWAL
08APR/2200 UTC      TS WARNING      FAIS...ULITHI
09APR/1600 UTC      CANC TS WARN    WOLEAI...FARAULEP
10APR/0100 UTC      CANC TY WATCH   YAP
10APR/0400 UTC      CANC TS/TY      FAIS...ULITHI

$$

AYDLETT


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