|
ZCZC NFDSPENES ALL SPENES HIZ000- . SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 10/24/20 0503Z SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-683-1404 LATEST DATA USED:G17W 10.4IR/6.2WV 0420Z;0240 BLTPW;AMSU89GHz;RADAR 0429Z;FCS . LOCATION...HAWAII... . ATTN WFOS...HFO... ATTN RFCS...AKRFC... . EVENT...FLASH FLOOD POTENTIAL OAHU AND KAUAI . SATELLITE ANALYSIS AND TRENDS...LATEST GOES WEST 17 SATELLITE IMAGERY ANALYSIS SHOWS A MID/UPPER CYCLONIC CIRCULATION NEAR 24N/157W AT 04Z NORTH OF THE WESTERN HAWAIIAN ISLANDS OF KAUAI AND OAHU WITH A LOBE ON THE SW SIDE OF THE CIRCULATION OVER OAHU WITH COOLING TOPS ON IR SATELLITE UP STREAM TO THE NW FLOWING OVER OAHU IN PARTICULAR. LOWER LEVEL WINDS AT 850MB FLOW INTO THE HAWAIIAN ISLANDS FROM A SW DIRECTION WHILE NW UPPER WINDS FLOW ALONG THE ISLAND CHAIN. THE 00Z PHLI SOUNDING RAOB SOUNDING SHOWED CAPE VALUES OF 3150 J/KG WITH A 1.77 PW CONSISTENT WITH SSMIS AND AMSU PW ESTIMATES OVER 1.8 INCHES. 24H 500MB HEIGHT FALLS OF 20 METERS AND 03Z RECENT PRESSURE FALLS AT THE SURFACE WITH SURROUNDING STATIONS REPORTING HIGHER SFC PRESSURE AROUND OAHU INDICATING POTENTIAL FOR RESULTING UPWARD MOTIONS OVER WESTERN HAWAIIAN ISLANDS. MOISTURE QUANTITIES INCREASING WITH SUCCESSIVE SATELLITE PASSES, INCLUDING 0240 BLTPW DATA OVER THE KAUAI CHANNEL, AND AN AXIS OF SURFACE MOISTURE CONVERGENCE FIELDS OVER THE WESTERN ISLANDS INDICATES HEAVY RAINFALL FOR OAHO/KAUAI WITH A POTENTIAL FOR FLASH FLOODING. . SHORT TERM OUTLOOK VALID 0500-1200Z...MEDIUM CONFIDENCE FACTOR IN SHORT TERM OUTLOOK...RECENT RADAR TRENDS SHOW RADAR ECHOES UP STREAM OF OAHU WITH RAINFALL RATES CAPABLE OF GENERATING MODERATE TO HEAVY RAINFALL, POTENTIALLY LEADING TO FLASH FLOODING. SATELLITE DATA SUGGESTS INCREASING MOISTURE, AS WELL AS S/WV ENERGY TO THE WEST OF THE ISLANDS MOVING TO THE SOUTHEAST THAT MAY GENERATE PVA AS IT MOVES CLOSER TO OAHU AND INTERACTS WITH THE LARGER SCALE MID/UPPER LEVEL CIRCULATION TO THE NORTH EAST OF THE HAWAIIAN ISLAND CHAIN. FLASH FLOODING MAY RESULT WITH HEAVIER RAINFALL. . ....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 2225 15821 1871 15281 1878 15568 2223 16082 . NNNN |
No Graphics Available
|