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ZCZC NFDSPENES ALL SPENES HIZ000- . SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 11/27/19 0310Z SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-683-1404 LATEST DATA USED: GOES-17 CH09/13;PHKI NEXRAD;AMSU PW;OBS;MC . LOCATION...HAWAII... . ATTN WFOS...HFO... ATTN RFCS...APRFC... . EVENT...HEAVY RAIN ACROSS WESTERN HAWAII . SATELLITE ANALYSIS AND TRENDS...A LINE OF COLD-TOPPED CONVECTION IS NOTED IN GOES-17 IR IMAGERY APPROACHING THE WESTERN HAWAIIAN ISLANDS OF NIHAU AND KAUAI, AND IS ALSO SEEN IN RADAR REFLECTIVITY. THIS LINE IS AT THE LEADING EDGE OF AN AXIS OF ENHANCED MOISTURE ASSOCIATED WITH CONVERGENT FLOW ALONG A SFC COLD FRONT APPROACHING THE REGION. THE 00Z RAOB AT PHLI MEASURED PW OF 1.82 INCHES, AND AMSU-DERIVED PW LEVELS JUST TO THE WEST OF THE ISLANDS ARE 2.0-2.5 INCHES. ALOFT, A STRONG SOUTHERLY UPPER JET IS NOTED IN WV IMAGERY, WITH THE RIGHT-ENTRANCE REGION AND DIFFLUENT FLOW SQUARELY OVER THE WESTERN ISLANDS. MODEST INSTABILITY WAS NOTED IN THE PHLI RAOB, AND THIS IS EXPECTED TO INCREASE AS THE MOISTURE AXIS APPROACHES . SHORT TERM OUTLOOK VALID 0310-0900Z...HIGH CONFIDENCE FACTOR IN SHORT TERM OUTLOOK...PHKI RADAR DEPICTS A BROAD LINE OF MODERATE TO HEAVY RAIN ORIENTED NNW-SSE MOVING GENERALLY NORTHWARD, WITH MODERATE RAIN JUST BEGINNING TO CROSS OVER SOUTHERN NIHAU. OVER THE NEXT SEVERAL HOURS, THIS CONVECTION WILL CROSS OVER THE REST OF NIHAU AND KAUAI. THE ENHANCED MOISTURE AND INCREASING INSTABILITY WILL ALLOW FOR HIGHER RAIN RATES, BRINGING A CHANCE OF EXCESSIVE RAINFALL TOTALS. TERRAIN-INDUCED RUNOFF WILL ADD TO THE POSSIBILITY OF FLOODING ISSUES. . ....NESDIS IS A MEMBER OF NWSCHAT (NESDISSATELLITEPRECIP).... ....NESDIS IS A MEMBER OF 12 PLANET.... . FOR QUESTIONS AND COMMENTS CONCERNING THE SATELLITE PRECIPITATION MESSAGES AND GRAPHICS PLEASE EMAIL SSDPrecip@noaa.gov . FOR PRECIP MESSAGES AND GRAPHICS ON THE WEB: http://www.ospo.noaa.gov/Products/atmosphere/spe/ . FOR AUTOMATED SATELLITE PRECIPITATION ESTIMATES ON THE WEB: http://www.star.nesdis.noaa.gov/smcd/emb/ff/CONUS.php . LAT...LON 2315 16060 2033 15411 1815 15415 2039 16084 2309 16056 . NNNN |
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