ZCZC NFDSPENES ALL
SPENES
HIZ000-
.
SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 04/24/09 1247Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-763-8678
LATEST DATA USED: GOES-11: 1230Z			DS
NOAA AMSU: 0800Z  NASA TRMM: 0606Z
.
LOCATION...HAWAII...
.
ATTN WFOS...HFO...
ATTN RFCS...AKRFC...
.
EVENT...LOCALLY HVY RAINS OVER E HONOLULU AND MAUI COUNTIES
.
SATELLITE ANALYSIS AND TRENDS...LARGE SCALE WV PICTURE SHOWED TWO SMALL
VORTS ROTATING AROUND ONE ANOTHER WITHIN A S/WV TROF THAT HAS BECOME
MORE INVERTED OVER THE PAST 6 HRS. SYNOPTIC SCALE TROF LIES TO THE NE
OF THIS FEATURE WITH THE UPPER LOW NR 33N/143W WHICH HAS BEEN SHEARED
APART RECENTLY AND NOW MORE RESEMBLES A STANDING WAVE. LOW LVL MOISTURE
HAS BEEN ON THE INCREASE DURING PAST 12 HRS..MOST NOTABLY JUST SW OF
MAUI/HONOLULU COUNTIES WITH AMSU PW VALUES CURRENTLY AT 1.8" JUST S OF
OAHU AND 1.4-1.6" ELSEWHERE ACROSS THE ISLANDS. THIS MOISTURE PLUME WILL
CONTINUE EWD TDY AND SHOULD MOSTLY CLEAR THE BIG ISLAND BY THE 00Z-06Z
TIME PERIOD GIVEN THE FAIRLY RAPID MOVEMENT OF AN ASSCD IMPULSE SEEN IN
THE SUBTROPICAL FLOW.
.
IR IMAGERY CURRENTLY SHOWS ENHANCING CNVTN CENTERED SW OF MOLOKAI THAT IS
AFFECTING EXTREME ERN OAHU AND MOLOKAI WITH MOD-LOCALLY HVY RAINS. THIS
CNVTN WILL SPREAD EWD ACROSS THE REST OF MAUI COUNTY EARLY THIS MORNING
AND LATER TDY SHOULD ALSO AFFECT THE BIG ISLAND. RECENT TRMM AND AMSU
PASSES INDICATE AREAL AVG RAINFALL RATES BETWEEN 0.25-0.5"/HR OCCURRING
WITH THIS CNVTN BUT THESE RATES COULD CERTAINLY BE INCREASED DUE TO LOCAL
TERRAIN EFFECTS. CNVTN NE OF THE BIG ISLAND HAS ALSO BEEN STRENGTHENING
RECENTLY BUT IT APPEARS FOR THE MOST PART THIS FEATURE IS MOVING EWD
AWAY FROM THE ISLAND. SOME ADDTL WEAK CNVTN IS PRESENT SW OF BIG ISLAND
WHICH SHOULD BRING SHOWERS NEWD ACROSS THE AREA TDY. BIGGEST HVY RAIN
THREAT APPEARS TO BE THE CNVTN NR MOLOKAI/OAHU THOUGH.
.
WILL ALSO NEED TO KEEP AN EYE ON WRN ISLANDS LATER ON FRIDAY AS THE
TWO VORTS DROP SEWD BRINGING COLD AIR ALOFT/TSTORM POTENTIAL FOR WRN
ISLANDS..THOUGH LOW LVL MOISTURE WILL LIKELY BE PUSHED WELL TO THE E BY
THEN SO HVY RAIN THREAT WILL BE GREATLY LESSENED. PLEASE SEE WEB ADDRESS
SHORTLY FOR GRAPHIC ANALYSIS.
.
SEE NCEP HPC DISCUSSION AND QPF/S FOR FORECAST.
....NESDIS IS A MEMBER OF 12 PLANET....
.
SSD/SAB WEB ADDRESS FOR PRECIP ESTIMATES:
HTTP://WWW.SSD.NOAA.GOV/PS/PCPN/
...ALL LOWER CASE EXCEPT /PS/PCPN/
.
LAT...LON 2240 15654 2101 15508 1944 15744 2053 15934
.
NNNN
 
Full Size Graphic


-