807
FXSA20 KWBC 151253
PMDSA
SOUTH AMERICA SYNOPTIC DISCUSSION - INTERNATIONAL DESKS
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
852 AM EDT FRI JUN 15 2012
GFS DATA AT FTPPRD.NCEP.NOAA.GOV/PUB/DATA/NCCF/COM/GFS/PROD/
SYNOPSIS (VALID FROM 00UTC JUN 15): AT 200 HPA...A WELL
ESTABLISHED SUBTROPICAL RIDGE CENTERS ON A HIGH OVER
RONDONIA/ACRE...AND ENVELOPS AN AREA NORTH OF 25S AND WEST OF
50W. THIS IS FAVORING THE NORTHWARD AMPLIFICATION OF A TUTT ALONG
39W TO COASTAL AMAPA. THE TROUGH IS STARTING TO ENHANCE
CONVECTIVE DEVELOPMENT ACROSS NORTHEAST COAST OF BRASIL. THE
RIDGE...MEANWHILE...IS VENTING DEEP CONVECTION ACROSS
CENTRAL/NORTHERN AMAZONAS IN BRASIL INTO ECUADOR AND SOUTHERN
COLOMBIA. CONVECTION WAS ALSO OCCURRING ALONG THE COAST OF
ECUADOR.
AT 250 HPA...THE JET ANALYSIS SHOWS THE SOUTHERN POLAR JET
EXTENDING ALONG 66S 117W EXITING AT 65S 84W. IT REFORMED AT 62S
65W EXITING AT 52S 66W. IT REFORMED 48S 59W ALONG 52S 42W...A
180KT MAXIMA AT 59S 25W. THE NORTHERN POLAR JET FORMED AT 57S 96W
ALONG 57S 80W...EXITING AT47S 76W. IT REFORMED AT 40S 77W ALONG A
148 KT MAXIMA AT 42S 59W...45S 41W...A 139KT MAXIMA AT 53S 18W.
ANOTHER BRANCH OF THE NORTHERN POLAR JET FORMED AT 30S 101W
EXITING AT 31S 81W. THE SUBTROPICAL JET FORMED ALONG 23S
114W...24S 101W...A 150KT MAXIMA AT 26S 92W...A 134KT MAXIMA AT
29S 77W...EXITING AT 31S 63W, IT REFORMED OVER EASTERN BUENOS
AIRES PROVINCE...40S 43W...49S 20W...EXITING AT 43S 05W. ANOTHER
BRANCH FORMED AT 16S 117W ALONG 21S 98W...24S 78W...CHACO
ARGENTINO...MATO GROSSO DO SUL...EXITING OVER SERRA DO GOIAS.
AT 500 HPA...A LONG WAVE RIDGE EXTENDS ALONG 40S 110W INTO THE
BELLINGSHAUSEN SEA/NORTHERN ANTARCTIC PENINSULA WHILE FLATTENING.
TO THE EAST...A DEEP TROUGH CENTERS ON A LOW JUST SOUTH OF THE
FALKLANDS AND EXTENDS INTO ISLA CHILOE/LOS LAGOS IN CHILE. THE
TROUGH WAS FOCUSING ITS ENERGY OVER MOST OF PATAGONIA. IN THE
NORTHERN STREAM...A CLOSED LOW CENTERED AT 32S 87W SUSTAINING
SURFACE FRONTS THAT WERE SLOWLY APPROACHING CHILE.
THE SURFACE ANALYSIS SHOWS A 998 HPA OCCLUDED LOW SOUTH OF THE
FALKLANDS EXTENDING A FRONT ALONG A 998 HPA LOW AT 55S
55W...ANOTHER 998 HPA LOW AT 51S 55W...46S 56W...TRELEW...ESQUEL.
RAINFALL WAS OCCURRING IN TIERRA DEL FUEGO AND SOUTHERN CHILE. A
1027 HPA HIGH CENTERED AT 46S 85. A 1021 HPA HIGH CENTERED WEST
OF BAHIA BLANCA. OVER THE EASTERN PACIFIC...A 994 HPA OCCLUDED
LOW CENTERED AT 31S 89W AND EXTENDED A FRONT ALONG A 1006 HPA LOW
AT 34S 81W...27S 81W...20S 88W. TO THE EAST...A 982 HPA LOW
CENTERED AT 53S 30W EXTENDING A FRONT ALONG 46S 36W...34S
45W...CHUI IN URUGUAY...PARANA IN ARGENTINA...A 1010 HPA LOW OVER
NORTHERN SANTA FE IN ARGENTINA...JUJUY. WIDESPREAD THUNDERSTORMS
WERE OCCURRING OVER URUGUAY/NORTHEAST ARGENTINA AHEAD OF THIS
BOUNDARY.
PARRENO...INAMHI (ECUADOR)
SANTAYANA...DNM (URUGUAY)
SOLORZANO...SMN (HONDURAS)
GALVEZ...HPC (USA)
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