From owner-wx-tropl@LISTSERV.ILLINOIS.EDU Wed Sep 29 20:10:54 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 o8TCArpf013781 for ; Wed, 29 Sep 2010 20:10:54 +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 o8TBncWZ025335; Wed, 29 Sep 2010 07:10:19 -0500 (CDT) Received: by LISTSERV.ILLINOIS.EDU (LISTSERV-TCP/IP release 14.5) with spool id 3652471 for WX-TROPL@LISTSERV.ILLINOIS.EDU; Wed, 29 Sep 2010 07:10:19 -0500 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 o8TCAJ0V002125 for ; Wed, 29 Sep 2010 07:10:19 -0500 (CDT) 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 o8TCACbC008479 for ; Wed, 29 Sep 2010 07:10:18 -0500 (CDT) Received: by weather3.admin.niu.edu (Postfix, from userid 501) id AC0104050030; Wed, 29 Sep 2010 07:10:12 -0500 (CDT) X-Proofpoint-Spam-Reason: safe Message-ID: <20100929121012.AC0104050030@weather3.admin.niu.edu> Date: Wed, 29 Sep 2010 07:10:12 -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 778 ATHW40 PHFO 291209 SIMHI HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI 1230 UTC WED SEP 29 2010 BASED ON DATA THROUGH 1200 UTC SEPTEMBER 29 2010 WATER VAPOR IMAGES SHOWED A BROAD AREA OF LOW PRESSURE IN THE UPPER ATMOSPHERE CENTERED NEAR 23N 174W. ISOLATED TOWERING CUMULI AND PROBABLE THUNDERSTORMS DEVELOPED ALONG THE NORTHWEST THROUGH NORTH EDGES OF THE LOW...PRODUCING PLENTIFUL MIDDLE TO HIGH DEBRIS CLOUDS THAT MOSTLY TO PARTLY OBSCURED LOWER FEATURES WITHIN THE CURVE FROM 28N 174W TO 26N 174W TO 22N 177W TO 24N 180 TO 27N 178W. THE LOW AND ITS ASSOCIATED CLOUDS DRIFTED WEST SLOWLY. A CLOUD BAND ASSOCIATED WITH A WEAKENING FRONT SPREAD OUT AS IT DISSIPATED SLOWLY NORTH OF THE MAIN HAWAIIAN ISLANDS. THIS FEATURE EXTENDED ACROSS HAWAIIAN WATERS WITHIN 120 MILES OF THE CURVE FROM 28N 178W TO 29N 176W TO 24N 160W...WITHIN 150 MILES OF THE CURVE FROM 24N 160W TO 23N 151W TO 27N 145W...AND WITHIN 45 MILES OF THE CURVE FROM 27N 145W TO 30N 141W AND FURTHER NORTH. THIS FEATURE CONSISTED MOSTLY OF MIDDLE TO LOW CLOUD LAYERS. DIFFERENT PARTS OF IT MOVED IN DIFFERENT DIRECTIONS...WITH THE NORTHWEST END DRIFTING WEST SLOWLY...AND THE CENTRAL AND SOUTHEAST PARTS FLOWING SOUTH AT 5 TO 10 MILES AN HOUR. COLD-AIR CUMULI MERGING INTO CLUMPS OR BANDS PARALLEL TO THE MAIN FRONTAL CLOUD BAND PREVAILED BETWEEN IT AND 30N. TO THE SOUTH...LIGHT TO MODERATE THUNDERSTORM ACTIVITY CONTINUED IN THE ITCZ BETWEEN 17N AND 06N. 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 OBSCURED LOWER FEATURES MOSTLY FROM 17N TO 05N...AND PARTLY BETWEEN 20N AND 01N. OTHERWISE...CLOUD COVER ACROSS HAWAIIAN WATERS CONSISTED MAINLY OF LOOSE BANDS OR CLUMPS OF MARINE STRATOCUMULI AND CUMULI NEAR 20N 170W...AND WITHIN 250 MILES OF THE LINE FROM 12N 151W TO 22N 140W. THESE CLUMPS VARIED IN SIZE FROM INDIVIDUAL SMALL CUMULI UP TO ABOUT 120 MILES ACROSS. THEY GENERALLY ROSE TO HEIGHTS OF 8000 TO 10000 FEET...AND MOVED TOWARD THE SOUTHWEST TO WEST SLOWLY. ACROSS THE MAIN HAWAIIAN ISLANDS...CLOUD COVER CONSISTED MOSTLY OF STRATUS LAYERS ASSOCIATED WITH THE FRONTAL CLOUD BAND MOVING ASHORE ALONG NORTH SLOPES OF OAHU. LAYERED DEBRIS CLOUDS FROM AFTERNOON CUMULUS BUILDUPS ON TUESDAY HAD DISSIPATED FOR THE MOST PART... EXCEPT ALONG LOWER SOUTHWEST SLOPES OF SOUTH KONA AND KAU DISTRICTS ON THE BIG ISLAND. THESE CLOUDS VARIED CONSIDERABLY IN HEIGHT FROM 3000 FEET TO 10000 FEET. RADAR DATA FROM NEAR THE ISLANDS SHOWED SCATTERED SHOWERS OFFSHORE WELL NORTH OF MAUI COUNTY...ISOLATED SHOWERS OFFSHORE WELL NORTH OF OAHU...AND ISOLATED SHOWERS OFFSHORE IN THE LEE PLUME TO THE WEST OF THE BIG ISLAND...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.