From owner-wx-tropl@LISTSERV.ILLINOIS.EDU Fri Dec 31 08:30:17 2010 Received: from vacuum.cso.uiuc.edu (vacuum.cso.uiuc.edu [128.174.5.113]) by cozumel.ust.hk (8.13.8/8.13.8) with ESMTP id oBV0UFvR018920 for ; Fri, 31 Dec 2010 08:30:16 +0800 Received: from vacuum.cso.uiuc.edu (vacuum.cso.uiuc.edu [128.174.5.113]) by vacuum.cso.uiuc.edu (8.14.2/8.14.2) with ESMTP id oBTFCXnG000588; Thu, 30 Dec 2010 18:30:01 -0600 (CST) Received: by LISTSERV.ILLINOIS.EDU (LISTSERV-TCP/IP release 14.5) with spool id 4917414 for WX-TROPL@LISTSERV.ILLINOIS.EDU; Thu, 30 Dec 2010 18:30:01 -0600 Received: from relay10.cites.uiuc.edu (relay10.cites.uiuc.edu [128.174.196.10]) by vacuum.cso.uiuc.edu (8.14.2/8.14.2) with ESMTP id oBV0U0R2002483 for ; Thu, 30 Dec 2010 18:30:00 -0600 (CST) Received: from weather3.admin.niu.edu (weather3.admin.niu.edu [131.156.8.48]) by relay10.cites.uiuc.edu (8.14.4/8.14.2) with ESMTP id oBV0TsaG023696 for ; Thu, 30 Dec 2010 18:30:00 -0600 (CST) Received: by weather3.admin.niu.edu (Postfix, from userid 501) id E8ACF3FE002D; Thu, 30 Dec 2010 18:29:53 -0600 (CST) X-Proofpoint-Spam-Reason: safe Message-ID: <20101231002953.E8ACF3FE002D@weather3.admin.niu.edu> Date: Thu, 30 Dec 2010 18:29:53 -0600 Reply-To: wxmaster@COX.NET Sender: WX-TROPL Tropical Storm and Hurricane WX products From: LDM Weather Subject: Central Pacific: Satellite Interpretation Message To: WX-TROPL@LISTSERV.ILLINOIS.EDU Precedence: list 383 ATHW40 PHFO 310029 SIMHI HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI 0030 UTC FRI DEC 31 2010 BASED ON DATA THROUGH 0000 UTC DECEMBER 31 2010 A COMPLEX WEATHER PATTERN CONTINUES OVER THE REGION...WHILE HIGH PRESSURE AT THE SURFACE AND ALOFT OVER AND EAST OF THE MAIN HAWAIIAN ISLANDS HAS USHERED IN A TRADE WIND FLOW. A NEARLY ZONAL...OR WEST TO EAST FLOWING...JET STREAM IS RACING ACROSS THE WESTERN PACIFIC ROUGHLY ALONG 30N...THEN ABRUPTLY TURNS TO THE NORTHEAST NEAR 160W AS IT SLAMS INTO AN UPPER LEVEL RIDGE ESTABLISHED ALONG 140W. AT THE BASE OF THE UPPER RIDGE...A CENTER OF HIGH PRESSURE ALOFT IS PARKED 675 MILES EAST OF THE BIG ISLAND NEAR 21N145W. MEANWHILE...A NEARLY STATIONARY UPPER LEVEL LOW IS CENTERED NEARLY 1000 MILES SOUTHWEST OF OAHU AT 12N170W. A TRADE WIND FLOW IS ESTABLISHED OVER ALL OF THE MAIN HAWAIIAN ISLANDS AS THE UPPER HIGH EAST OF THE STATE AND ASSOCIATED SURFACE HIGH PRESSURE EXERT A GREATER INFLUENCE AND THE UPPER LOW TO THE SOUTHWEST WEAKENS AND FILLS. MAINLY SCATTERED LOW CLOUDS NEAR THE ISLANDS ARE TRAVELLING FROM THE EAST AROUND 20 MPH. LOW CLOUD COVER OVER THE ISLANDS IS GREATEST OVER THE WESTERN END OF THE STATE...AS A BATCH OF BROKEN STRATOCUMULUS AND CUMULUS CLOUDS COVERS MOST OF KAUAI. THIS AREA OF CLOUDS CLEARED OAHU EARLIER IN THE AFTERNOON BUT HAS LEFT BROKEN LOW CLOUDS ALONG THE KOOLAU RANGE. HOWEVER...NARROW BANDS OF LOW CLOUDS DOWNWIND OF AND PARALLEL TO THE KOOLAU RANGE PERSIST...HINTING AT THE STABLE CONDITIONS THAT HAVE SET UP OVER THE STATE. SATELLITE-DERIVED PRECIPITABLE WATER ESTIMATES SHOW 1.3 INCHES NEAR KAUAI TAPERING OFF TO AROUND 1 INCH EAST OF OAHU. AS A RESULT...ONLY PATCHES OF BROKEN LOW CLOUDS ARE FOUND ALONG WINDWARD SECTIONS OF MAUI COUNTY AND THE BIG ISLAND NORTH OF OOKALA. SEA BREEZES HAVE LED TO THE DEVELOPMENT OF BROKEN LOW CLOUDS ALONG LEEWARD SLOPES OF THE BIG ISLAND BELOW 7000 FT SOUTH OF KAMUELA. WITH THE ZONAL JET STREAM ABRUPTLY CHANGING COURSE OVER THE FAR NORTHWEST PORTION OF THE AREA...A SERIES OF FRONTS ARE STACKED UP OVER NORTHERN WATERS...AS WELL AS A FIELD OF BROKEN HIGH CLOUDS NORTH OF 23N EAST OF 167W. A TROUGH ALONG 30N152W...26N160W...AND 20N169W IS MOVING TO THE EAST AT 15 MPH NORTH OF 26N AND IS STALLED TO THE SOUTH. ANOTHER DECAYING FRONT RUNS ALONG 30N151W AND 28N166W. RAGGED LOW CLOUD BANDS...ROUGHLY 150 MILES WIDE...MARK THESE FEATURES. ANOTHER FRONT AT 30N180 IS MOVING TO THE EAST NEAR 40 MPH AND IS MARKED BY A 200 MILE WIDE BAND OF LAYERED CLOUDS. TO THE SOUTH OF THE STATE...ISOLATED THUNDERSTORMS WITH TOPS TO 51000 FT ARE BEING TRIGGERED BY THE UPPER LOW ALONG THE ITCZ NEAR 07N159W. ELSEWHERE...THUNDERSTORMS ARE NON-EXISTENT ALONG THE ITCZ...WHICH IS CONFINED SOUTH OF 10N. $$ DWROE +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from WX-TROPL send e-mail to LISTSERV@LISTSERV.ILLINOIS.EDU with "unsub wx-tropl" in the body of your message. For help with WX-TROPL write to cnovy@cox.net. For more information on tropical weather products, see the NHC Homepage at http://www.nhc.noaa.gov.