From owner-wx-tropl@LISTSERV.ILLINOIS.EDU Thu Sep 30 13:30:18 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 o8U5UHVg024138 for ; Thu, 30 Sep 2010 13:30:18 +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 o8TLcU2V025335; Thu, 30 Sep 2010 00:29:58 -0500 (CDT) Received: by LISTSERV.ILLINOIS.EDU (LISTSERV-TCP/IP release 14.5) with spool id 3669313 for WX-TROPL@LISTSERV.ILLINOIS.EDU; Thu, 30 Sep 2010 00:29:57 -0500 Received: from relay07.cites.uiuc.edu (relay07.cites.uiuc.edu [128.174.4.73]) by vacuum.cso.uiuc.edu (8.14.2/8.14.2) with ESMTP id o8U5TtgN024159 for ; Thu, 30 Sep 2010 00:29:55 -0500 (CDT) Received: from weather3.admin.niu.edu (weather3.admin.niu.edu [131.156.8.48]) by relay07.cites.uiuc.edu (8.14.4/8.14.2) with ESMTP id o8U5TmOT009923 for ; Thu, 30 Sep 2010 00:29:55 -0500 (CDT) Received: by weather3.admin.niu.edu (Postfix, from userid 501) id D71814050030; Thu, 30 Sep 2010 00:29:48 -0500 (CDT) X-Proofpoint-Spam-Reason: safe Message-ID: <20100930052948.D71814050030@weather3.admin.niu.edu> Date: Thu, 30 Sep 2010 00:29:48 -0500 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 943 ATHW40 PHFO 300529 SIMHI HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI 0530 UTC THU SEP 30 2010 BASED ON DATA THROUGH 0500 UTC SEPTEMBER 30 2010 WATER VAPOR IMAGES SHOWED A BROAD AREA OF LOW PRESSURE IN THE UPPER ATMOSPHERE CENTERED NEAR 26N 176W. ISOLATED THUNDERSTORMS DEVELOPED UNDER THE LOW CENTER...PRODUCING MIDDLE TO HIGH DEBRIS CLOUDS THAT PARTLY TO MOSTLY OBSCURED LOWER FEATURES WEST OF THE CURVE FROM 25N 180 TO 28N 177W TO 25N 174W TO 20N 180. THE LOW AND ITS ASSOCIATED CLOUDS DRIFTED WEST SLOWLY. A DISSIPATING BAND OF CLOUDS ASSOCIATED WITH A WEAKENING FRONT EXTENDED ACROSS HAWAIIAN WATERS WITHIN 120 MILES OF THE CURVE FROM 28N 180 TO 28N 177W TO 22N 155W TO 22N 151W TO 30N 140W AND FURTHER NORTHEAST. THIS FEATURE CONSISTED MOSTLY OF FRAGMENTED LOW TO MIDDLE CLOUD LAYERS. DIFFERENT PARTS OF IT MOVED IN DIFFERENT DIRECTIONS... WITH THE NORTHWEST END DRIFTING WEST SLOWLY...AND THE CENTRAL PART FLOWING SOUTH SLOWLY. STRATOCUMULI MERGING INTO CLUMPS OR BANDS PARALLEL TO THE MAIN FRONTAL CLOUD BAND PREVAILED BETWEEN IT AND 30N. TO THE SOUTH...LIGHT THUNDERSTORM ACTIVITY CONTINUED IN THE ITCZ BETWEEN 17N AND 07N. ALTHOUGH SEVERAL WEAK CENTERS OF LOW PRESSURE WERE PRESENT IN THE ITCZ...THEY DID NOT APPEAR TO BE ASSOCIATED WITH PERSISTENT THUNDERSTORM ACTIVITY. LAYERED MIDDLE TO HIGH DEBRIS CLOUDS FROM THIS AND EARLIER CONVECTION MOSTLY OBSCURED LOWER FEATURES FROM 19N TO 05N...AND PARTLY OBSCURED LOWER FEATURES AS FAR NORTH AS 25N...ESPECIALLY TO THE WEST OF 170W. OTHERWISE...CLOUD COVER ACROSS HAWAIIAN WATERS CONSISTED MAINLY OF LOOSE BANDS OR CLUMPS OF MARINE STRATOCUMULI AND CUMULI NEAR 21N 170W...AND NEAR 22N 143W. THESE CLUMPS VARIED IN SIZE FROM INDIVIDUAL SMALL CUMULI UP TO FEATURES ABOUT 200 MILES LONG AND 90 MILES ACROSS. THEY GENERALLY ROSE TO HEIGHTS OF 8000 TO 10000 FEET...AND REMAINED NEARLY STATIONARY. ACROSS THE MAIN HAWAIIAN ISLANDS...CLOUD COVER CONSISTED MOSTLY OF STRATUS LAYERS ASSOCIATED WITH THE FRONTAL CLOUD BAND MOVING ASHORE ALONG NORTH SLOPES...ALTHOUGH AFTERNOON CUMULUS BUILDUPS AND THEIR LAYERED DEBRIS CLOUDS WERE IMPORTANT AS WELL OVER HIGHER TERRAIN INLAND...ESPECIALLY OVER SLOPES FACING SOUTH THROUGH WEST. AREAS WITH THE LEAST CLOUD COVER WERE LIMITED MAINLY TO THE CENTRAL ISTHMUS OF MAUI...THE WEST COAST OF NORTH KOHALA DISTRICT ON THE BIG ISLAND...THE SUMMITS OF MAUNA KEA AND MAUNA LOA ON THE BIG ISLAND... AND THE COAST OF SOUTH HILO...PUNA...AND KAU DISTRICTS ON THE BIG ISLAND. THESE CLOUDS VARIED CONSIDERABLY IN HEIGHT FROM 3000 FEET TO 12000 FEET...THOUGH THE LAYERED CLOUDS ASSOCIATED WITH THE FRONTAL CLOUD BAND MORE UNIFORMLY APPROACHED THE HIGHER END OF THAT RANGE. RADAR DATA FROM NEAR THE ISLANDS SHOWED AREAS OF RAIN WITHIN A REGION 100 MILES WIDE STRETCHING FROM WEST OF NIIHAU ACROSS SOUTH KAUAI...OAHU...AND NORTH PARTS OF MAUI COUNTY...BUT LITTLE PRECIPITATION OTHERWISE. $$ RYSHKO +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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.