ACPQ70 PGUM 120700
PSHPQ 
POST-STORM REPORT...TROPICAL DEPRESSION 27W
NATIONAL WEATHER SERVICE TIYAN GU
5 PM CHST FRI DEC 12 2008
NOTE: THIS FAST MOVING TROPICAL DEPRESSION DEVELOPED WITHIN 24 HOURS 
OF PASSING JUST SOUTH OF GUAM. INFORMATION ON THE DISTURBANCE WAS 
FIRST PASSED TO CUSTOMERS VIA A SPECIAL WEATHER STATEMENTS ISSUED BY 
WFO GUAM AT 10 DEC 11 PM CHST (10DEC1300 UTC)...AT THIS TIME THE 
JOINT TYPHOON WARNING CENTER (JTWC) HAD INDICATED IN THEIR 
SIGNIFICANT WEATHER BULLETIN (ABPW10 PGTW) ISSUED AT 10DEC0600 UTC 
THAT THE DISTURBANCE HAD A 'POOR' POTENTIAL OF BECOMING A 
SIGNIFICANT TROPICAL CYCLONE. JTWC SUBSEQUENTLY ISSUED THEIR FIRST 
WARNING ON THIS SYSTEM AT 11 DEC 1 AM (10DEC1500 UTC) AS IT RAPIDLY 
GAINED TROPICAL CHARACTERISTICS. 
METEOROLOGICAL DATA FOR THE ISLAND OF GUAM (13.3N 144.7E),US
TERRITORY
A.  HIGHEST WINDS       DIRECTION/SUSTAINED(TIME)/PEAK WIND(TIME)
    GUAM AIRPORT          040     26KT (0412Z)      36KT (0334Z)     
    ANDERSEN AFB        070-140   25KT(0555Z)       32/33KT
                                                 (0546Z-1255Z)       
    APRA HARBOR HANDAR    108      32KT             48KT (0751Z)
    MANGILAO HANDAR       156      11KT             38KT (1551Z)
    INARAJAN HANDAR       109      20KT             39KT (0751Z)
    MERIZO HANDAR         120      XXXKT            27KT (0651Z)
    ROTA HANDAR           080       20KT            28KT (0459Z) 
    (CLOSED 10-15Z)       110       21KT            27KT (~17-18Z)
B.  LOWEST PRESSURE   
    GUAM AIRPORT              1000.2 MB AT 11/0554Z
    ANDERSEN AFB              1001.7 MB AT 11/0538Z
    APRA HARBOR HANDAR        1000.9 MB AT 11/0551Z-0651Z
    MANGILAO HANDAR            993.9 (UNCORRECTED) MB AT 11/0451Z
    INARAJAN HANDAR           1000.7 MB AT 29/0551Z     
    MERIZO HANDAR             1000.0 MB AT 29/0651Z
 C.  MAXIMUM RAINFALL  10/0051Z TO 12/0051Z (INCHES)
    GUAM AIRPORT              .75
    ANDERSEN AFB              .57
    APRA HARBOR HANDAR       1.46
    MANGILAO HANDAR          1.00
    INARAJAN HANDAR          2.05
    MERIZO HANDAR            1.64
   
     
D.  STORM TIDES, BEACH EROSION, FLOODING AND STORM EFFECTS
GOVERNMENT GUAM OFFICIALS REPORTED THAT SPORADIC POWER OUTAGES WERE 
NOTED AROUND THE ISLAND...PRIMARILY DUE TO FALLING TREES AND DEBRIS. 
NO OTHER SIGNIFICANT DAMAGE WAS REPORTED.  
E.  OTHER COMMENTS.
CLOSEST APPROACH TO GUAM (HAGATNA) WAS S AT 33 NM AT 11/0615 UTC
(APPROXIMATELY 20NM S OF THE SOUTHERN TIP OF GUAM).
CLOSEST APPROACH TO ROTA WAS S AT 75 NM AT 11/0600 UTC  
    
NO TROPICAL CYCLONE FORMATION ALERT ISSUED BY THE JOINT TYPHOON 
WARNING CENTER.
10 DECEMBER AT 11 PM CHST (10 DECEMBER 1300 UTC) SPECIAL WEATHER 
STATEMENT ISSUED FOR THE MARIANA ISLANDS (GUAM...ROTA...TINIAN AND 
SAIPAN). STATEMENT INDICATED THAT A DISTURBANCE SHOULD PASS CLOSE TO 
OR JUST SOUTH OF THE ISLAND OF GUAM LATE THURSDAY NIGHT WITH WINDS 
15 TO 25 MPH...WITH GUSTS UP TO 35 MPH IN SHOWERS.
11 DECEMBER 1 AM CHST (10 DECEMBER 1500 UTC) FIRST WARNING ISSUED BY 
THE JOINT TYPHOON WARNING CENTER FOR TROPICAL DEPRESSION 27W. 
FORECAST TRACK PLACED THE DEVELOPING DEPRESSION OVER...OR VERY CLOSE 
TO...ROTA WITHIN 24 HOURS. POSITION AT 111200 DEC AT 14.1N 145.3E 
WITH 35KT SUSTAINED WINDS...GUSTING TO 45KT.
11 DECEMBER AT 200 AM CHST (10 DECEMBER 1600 UTC) TROPICAL STORM 
WARNING 
ISSUED FOR GUAM...TROPICAL STORM WATCH ISSUED FOR ROTA.
11 DECEMBER GOVERNMENT OF GUAM CIVIL DEFENSE AND DEPARTMENT OF 
HOMELAND SECURITY ACTIVATED THE GUAM EMERGENCY OPERATIONS CENTER. NO 
CONDITIONS OF READINESS WERE DECLARED BY EITHER THE CIVILIAN 
GOVERNMENT OR MILITARY.
11 DECEMBER AT 8 PM CHST (11 DECEMBER 1000 UTC) TROPICAL STORM WATCH 
FOR ROTA CANCELED. 
12 DECEMBER AT 1 AM CHST (11 DECEMBER 1500 UTC) TROPICAL STORM 
WARNING FOR GUAM CANCELED (ADVISORY NUMBER 5). 
12 DECEMBER AT 4 AM CHST (11 DECEMBER 1800 UTC) JTWC UPGRADED 
TROPICAL DEPRESSION 27 TO TROPICAL STORM 27W. LOCATION WAS 
APPROXIMATELY 210 NM WEST OF GUAM.