From owner-wx-tropl@LISTSERV.ILLINOIS.EDU Fri Oct 1 02:32:59 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 o8UIWwBE031230 for ; Fri, 1 Oct 2010 02:32:59 +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 o8UFoGoL025335; Thu, 30 Sep 2010 13:32:42 -0500 (CDT) Received: by LISTSERV.ILLINOIS.EDU (LISTSERV-TCP/IP release 14.5) with spool id 3678648 for WX-TROPL@LISTSERV.ILLINOIS.EDU; Thu, 30 Sep 2010 13:32:42 -0500 Received: from relay03.cites.uiuc.edu (relay03.cites.uiuc.edu [128.174.4.69]) by vacuum.cso.uiuc.edu (8.14.2/8.14.2) with ESMTP id o8UIWgP8013001 for ; Thu, 30 Sep 2010 13:32:42 -0500 (CDT) Received: from weather3.admin.niu.edu (weather3.admin.niu.edu [131.156.8.48]) by relay03.cites.uiuc.edu (8.14.4/8.14.2) with ESMTP id o8UIWafD014409 for ; Thu, 30 Sep 2010 13:32:42 -0500 (CDT) Received: by weather3.admin.niu.edu (Postfix, from userid 501) id 0AB144050037; Thu, 30 Sep 2010 13:32:35 -0500 (CDT) X-Proofpoint-Spam-Reason: safe Message-ID: <20100930183236.0AB144050037@weather3.admin.niu.edu> Date: Thu, 30 Sep 2010 13:32:35 -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 235 ATHW40 PHFO 301832 SIMHI HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI 1830 UTC THU SEP 30 2010 BASED ON DATA THROUGH 1800 UTC SEPTEMBER 30 2010 A LIGHT NORTHERLY FLOW PREVAILS IN THE LOW LEVELS NEAR THE ISLANDS FROM KAUAI TO MOLOKAI...WHILE AN EASTERLY FLOW IS SEEN OVER WATERS SOUTH OF THE BIG ISLAND. HOWEVER...CLOUD MOTIONS ON REGIONAL SATELLITE IMAGERY MASK THIS FACT...AS CLOUDS JUST ABOVE THE SURFACE ARE MOVING TOWARD THE SOUTHEAST NEAR KAUAI...AND A WEAK CIRCULATION...AT CLOUD LEVEL...IS APPARENT OVER WATERS ABOUT 100 MILES NORTH OF OAHU. CLOUDS OVER THE WATERS NORTHEAST OF THE BIG ISLAND ARE DRIFTING TO THE EAST. THE DIFFERENCE BETWEEN THE ACTUAL LOW LEVEL FLOW AND OBSERVED CLOUD MOTIONS IS DUE TO THE FACT THAT THE LOW LEVEL FLOW IS SHALLOW...AND SOME OF THE CLOUDS ARE IN A LAYER THAT EXTENDS FROM 9 TO 14 THOUSAND FEET...WHERE STEERING WINDS ARE DIFFERENT FROM THE LOW LEVEL WINDS. SKIES OVER KAUAI ARE CLOUDY...WITH BROKEN TO OVERCAST CLOUDS...OBSERVED TO BE NEAR 8 THOUSAND FEET...TRACKING FROM NORTHWEST TO SOUTHEAST OVER THE ISLAND. A GOOD PORTION OF OAHU IS UNDER MOSTLY SUNNY SKIES THIS MORNING...ALTHOUGH A FEW SHOWERS MOVED FROM NORTH TO SOUTH OVER THE NORTH SHORE NEAR KAHUKU NEAR SUNRISE. SMALL PATCHES OF CUMULUS /CU/ ARE OVER THE SPINE OF THE KOOLAU RIDGE...WITH A SLIGHTLY LARGER PATCH OF CU OVER THE WAIANAE RANGE... AND OVER NEAR SHORE WATERS NORTH OF MOKULEIA. AN AREA OF BROKEN STRATOCUMULUS /SC/ IS OVER SOUTHEAST OAHU NEAR WAIMANALO...AND THE REMAINDER OF THE ISLAND IS SUNNY. BROKEN TO OVERCAST SHOWERY CU EXTEND NORTHWARD...AND TO A LESSER EXTENT EASTWARD...FROM THE NEAR SHORE WINDWARD WATERS OF MAUI AND MOLOKAI...AND SKIES OVER MAUI COUNTY ARE MOSTLY CLOUDY UNDER A MIX OF STABLE SC AND SHOWERY CU. IN CONTRAST...THE BIG ISLAND IS SUNNY...WITH ONLY A FEW SC LOCATED OVER NEAR SHORE WATERS OFF THE HAMAKUA COAST. WATER VAPOR IMAGERY SHOWS A CLOSED LOW ALOFT CENTERED ABOUT 100 MILES SOUTHEAST OF THE BIG ISLAND...THAT HAS BEEN DRIFTING SOUTH OVER THE PAST 8 HOURS. AN ANTICYCLONE ALOFT IS CENTERED ABOUT 375 MILES WEST OF KAUAI...WITH THE END RESULT BEING A NORTH TO NORTHEAST FLOW ALOFT OVER THE ISLANDS. ISOLATED THUNDERSTORMS REMAIN DISORGANIZED WITHIN THE NEAR EQUATORIAL TRADE WIND CONVERGENCE ZONE SOUTH OF THE ISLANDS. $$ BIRCHARD +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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.