Subject: Pacific-NW: 1. Typhoon 13w (malakas) Warning Nr 020

From: SIU Weather Processor <[email-masked]>
Date: Fri, 24 Sep 2010 21:27:27 -0500

WTPN32 PGTW 250300
MSGID/GENADMIN/NAVMARFCSTCEN PEARL HARBOR HI/JTWC//
SUBJ/TROPICAL CYCLONE WARNING//
RMKS/
1. TYPHOON 13W (MALAKAS) WARNING NR 020
   01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
   WIND RADII VALID OVER OPEN WATER ONLY
    ---
   WARNING POSITION:
   250000Z --- NEAR 34.0N 144.2E
     MOVEMENT PAST SIX HOURS - 025 DEGREES AT 32 KTS
     POSITION ACCURATE TO WITHIN 040 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 075 KT, GUSTS 090 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   BECOMING EXTRATROPICAL
   RADIUS OF 064 KT WINDS - 035 NM NORTHEAST QUADRANT
                            035 NM SOUTHEAST QUADRANT
                            035 NM SOUTHWEST QUADRANT
                            035 NM NORTHWEST QUADRANT
   RADIUS OF 050 KT WINDS - 080 NM NORTHEAST QUADRANT
                            065 NM SOUTHEAST QUADRANT
                            045 NM SOUTHWEST QUADRANT
                            070 NM NORTHWEST QUADRANT
   RADIUS OF 034 KT WINDS - 160 NM NORTHEAST QUADRANT
                            145 NM SOUTHEAST QUADRANT
                            110 NM SOUTHWEST QUADRANT
                            150 NM NORTHWEST QUADRANT
   REPEAT POSIT: 34.0N 144.2E
    ---
   FORECASTS:
   12 HRS, VALID AT:
   251200Z --- 39.5N 148.4E
   MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   EXTRATROPICAL
   VECTOR TO 24 HR POSIT: 040 DEG/ 30 KTS
    ---
   24 HRS, VALID AT:
   260000Z --- 44.2N 153.6E
   MAX SUSTAINED WINDS - 055 KT, GUSTS 070 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   EXTRATROPICAL
    ---
REMARKS:
250300Z POSITION NEAR 35.4N 145.2E.
TYPHOON (TY) 13W (MALAKAS), LOCATED APPROXIMATELY 245 NM EAST-
SOUTHEAST OF TOKYO, JAPAN, HAS TRACKED NORTH-NORTHEASTWARD AT 32
KNOTS OVER THE PAST SIX HOURS. POSITION IS BASED ON VISUAL IMAGERY
AND A 242334Z ASCAT IMAGE. THE WINDFIELD INDICATED BY THE ASCAT
IMAGE VERIFIES A DRAMATIC SHIFT IN THE WINDFIELD AHEAD OF THE STORM
WHICH SHOWS A DEVELOPING WARM FRONT. THE SYSTEM IS BEGINNING TO TAKE
ON FRONTAL CHARACTERISTICS ON BOTH SIDES AS COOLER DRIER AIR IS
SPILLING OVER HONSHU AND FEEDING INTO THE WESTERN QUADRANT OF THE
SYSTEM. ANIMATED MULTISPECTRAL SATELLITE IMAGERY AND A 242239Z SSMIS
IMAGE ALSO CONFIRM THAT THE SYSTEM IS RAPIDLY UNDERGOING EXTRA-
TROPICAL TRANSITION. EYE-WALL COLLAPSE IS NOW EVIDENT AND WATER
VAPOR IMAGERY SHOWS THAT THE UPPER LEVELS OF THE SYSTEM HAVE COUPLED
WITH THE MID-LATITUDE FLOW. TY MALAKAS' UPPER LEVEL CIRCULATION
CENTER AND LOW-LEVEL CIRCULATION CENTER HAVE NOW DE-COUPLED. DEEP
CONVECTION ASSOCIATED WITH THE STORM IS SHEARING TO THE NORTHEAST
AND IS NEARLY COMPLETELY GONE OVER THE EQUATORWARD QUADRANTS OF THE
SYSTEM. AVAILABLE DYNAMIC AIDS ARE IN TIGHT AGREEMENT IN PROJECTING
THE STORM TO MOVE RAPIDLY INTO A BAROCLINIC ZONE EXTENDING FROM
NORTHERN HONSHU INTO THE WESTERN PACIFIC, WHERE IT WILL BECOME A
STORM FORCE MID-LATITUDE LOW PRESSURE SYSTEM BY TAU 12. THE FORECAST
IS BASED ON THE CONSENSUS TRACK. THIS IS THE FINAL WARNING ON THIS
SYSTEM BY THE JOINT TYPHOON WARNING CENTER (NAVMARFCSTCEN). THE
SYSTEM WILL BE CLOSELY MONITORED FOR SIGNS OF REGENERATION. MAXIMUM
SIGNIFICANT WAVE HEIGHT AT 250000Z IS 33 FEET.//

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