The southern branch of the wave that originated Chantal is approaching Central America and will produce rainy weather in the next couple of days:
TROPICAL DISCUSSION - INTERNATIONAL DESKS
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
303 PM EDT THU JUL 11 2013
DISCUSSION FROM JULY 11/00UTC: CONVECTION IN CENTRAL AND SOUTHERN
MEXICO IS ACTIVATING WHILE WANING OVER THE SIERRA MADRE
OCCIDENTAL. DEEP MOISTURE POOL OVER THE EASTERN PACIFIC WILL
CONTINUE SUSTAINING SEASONALLY ACTIVE CONVECTION OVER THE REGION.
FURTHERMORE...WAVES ARRIVING FROM THE EAST AND ACTIVE CONVECTION
OFF THE PACIFIC BASIN OF NORTHERN CENTRAL AMERICA WILL ENHANCE
FORCING TO SUSTAIN WET PATTERN. ON DAY 01 EXPECTING AMOUNTS OF
10-15MM/DAY AND MAXIMA OF 20-40MM IN DIURNAL THUNDERSTORMS.
AMOUNTS WILL INCREASE TO 15-20MM/DAY AND MAXIMA OF 25-50MM ALONG
SOUTHERN MEXICO. ON DAY 03...TROPICAL WAVE ARRIVES. THIS SHOULD
LEAD TO AN INCREASE IN ACCUMULATIONS TO 15-20MM/DAY AND MAXIMA OF
35-70MM.
OVER SOUTHEASTERN MEXICO/NORTHERN CENTRAL AMERICA VERY ACTIVE
PATTERN IS ESTABLISHING. DEEP MOISTURE POOL...TROPICAL WAVES AND
VENTILATION ALOFT WILL FAVOR MODERATE AND HEAVY AMOUNTS. ON DAY
01...EXPECTING ACTIVE DIURNAL CONVECTION OVER CENTRAL/WESTERN
NICARAGUA-HONDURAS-ALL OF EL SALVADOR-GUATEMALA-CHIAPAS TO PRODUCE
ACCUMULATIONS OF 15-20MM/DAY AND MAXIMA OF 25-50MM. ACTIVE
CONVECTION IS EXPECTED IN YUCATAN/BELIZE/NORTHERN GUATEMALA WITH
SIMILAR AMOUNTS IN AFTERNOON/EVENING THUNDERSTORMS. ON DAY
02...EXPECTING HEAVIEST OVER GUATEMALA/CHIAPAS WITH AMOUNTS OF
15-25MM/DAY AND MAXIMA OF 30-60MM. OVER YUCATAN EXPECTING
10-15MM/DAY AND MAXIMA OF 20-40MM. AMOUNTS ARE TO INCREASE ON DAY
03 AS WAVE THAT GENERATED CHANTAL ARRIVES IN FROM THE EAST. THIS
WILL LEAD TO HEAVIEST STORMS OVER HONDURAS INTO GUATEMALA/EL
SALVADOR LEADING TO AMOUNTS OF 15-20MM/DAY AND MAXIMA OF 35-70MM.
ACROSS COSTA RICA AND PANAMA ACTIVE CONVECTION WILL DOMINATE
THROUGH MID CYCLE. EXPECTING A DECREASE IN PANAMA DURING DAY 03 AS
WAVES MOVE AWAY AND A DRIER AIR MASS ARRIVES IN FROM THE EAST.
EXPECTING HEAVIEST THROUGH 60 HRS TO PRODUCE AMOUNTS OF
15-20MM/DAY AND MAXIMA OF 30-60MM.
TO THE EAST ACROSS THE CARIBBEAN BASIN...WETTEST WILL REMAIN IN
THE WESTERN HALF ASSOCIATED WITH REMNANTS OF CHANTAL AND
INTERACTION WITH TUTT OVER NORTHERN CUBA. AREAS TO THE EAST OF THE
DOMINICAN REPUBLIC/ABC WILL REMAIN UNDER A WELL ESTABLISHED
SUBSIDENCE INVERSION WHERE SHALLOW CONVECTION WILL BE THE RULE.
EXPECTING HEAVIEST OVER CENTRAL-SOUTHEASTERN CUBA TODAY WITH
AMOUNTS OF 25-50MM/DAY AND MAXIMA OF 75-125MM. OVER JAMAICA
EXPECTING 15-20MM/DAY AND MAXIMA OF 25-50MM. OVER THE CENTRAL AND
NORTHERN BAHAMAS EXPECTING SIMILAR AMOUNTS WITH MAXIMA OF
30-60MM...AS REMNANTS OF CHANTAL INTERACT WITH TUTT TO THE WEST.
ON DAY 02 EXPECTING HEAVIEST OVER CUBA WITH AMOUNTS OF 15-20MM/DAY
AND MAXIMA OF 25-50MM OVER THE CAYMAN ISLANDS AND THE NORTHWESTERN
BAHAMAS EXPECTING 10-15MM/DAY AND MAXIMA OF 20-40MM. EXPECTING
AMOUNTS TO DECREASE TOWARDS DAY 03.
ACROSS NORTHERN SOUTH AMERICA...DRYING TREND IS EXPECTED OVER
VENEZUELA AND THEN COLOMBIA...WHILE AMOUNTS WILL INCREASE IN THE
GUIANAS ON DAY 02-03 AS A WAVE ARRIVES. OVER COLOMBIA MOST ACTIVE
WILL REMAIN OVER NORTHWESTERN THIRD OF THE COUNTRY ON DAY 01 WITH
ISOLATED ACCUMULATIONS OF 15-20MM/DAY AND MAXIMA OF 30-60MM IN
STRONGEST CONVECTION. AREA WILL REMAIN ACTIVE ON DAY 02 WITH A
DECREASING TREND. SOME ACTIVE CONVECTION WILL PERSIST ACROSS
EASTERN AND SOUTHEASTERN COLOMBIA AS WELL. ACROSS THE
GUIANAS...ARRIVING WAVE WILL LEAD TO AN INCREASE IN ACCUMULATIONS
TO 15-20MM/DAY AND MAXIMA OF 30-60MM.
TROPICAL/EASTERLY WAVES INITIALIZED AT 12UTC
INITIAL 24 36 48 60 72 84 96 TYPE
44W 50W 53W 56W 58W 60W 62W 64W TW
77W 79W 82W 84W 86W 88W 91W 94W TW
83W 87W 90W 92W 94W DISS TW
89W 93W 95W 97W DISS TW
TROPICAL WAVE AT 44W IS TILTED AND SOUTHERN TIER WILL START
AFFECTING FRENCH GUIANA LATER TODAY. WAVE WILL ENHANCE
ACCUMULATIONS ESPECIALLY ON DAYS 02 AND 03 AS IT MOVES INTO
NORTHERN GUIANA/SOUTHEASTERN VENEZUELA.
TROPICAL WAVE THAT ORIGINATED CHANTAL IS NOW LOCATED AT 77W AND TO
THE SOUTH OF 20-21N...ALTHOUGH NORTHERN END OF WAVE IS PROPAGATING
NORTHWESTWARD ACROSS THE BAHAMAS WHILE INTERACTING WITH TUTT TO
THE WEST. THE TROPICAL WAVE WILL ENHANCE ACCUMULATIONS ACROSS
JAMAICA/CUBA/BAHAMAS ON DAY 01...ACROSS WESTERN CUBA/CAYMAN
ISLANDS ON DAY 02...AND ACROSS HONDURAS/EL SALVADOR/GUATEMALA INTO
THE GULF OF HONDURAS ON DAY 03.
WEAK TROPICAL WAVE AT 83W WILL ENHANCE ACCUMULATIONS ACROSS
CENTRAL AMERICA TODAY AND DURING DAY 02...WANING LATER AS IT MOVES
ACROSS THE EASTERN PACIFIC.
TROPICAL WAVE AT 89W IS LOSING DEFINITION WHILE BECOMING EMBEDDED
IN BROAD TROUGHS ACROSS THE EASTERN PACIFIC.
MCKENZIE...BDM (BAHAMAS)
ROBINSON...MSJ (JAMAICA)
GALVEZ...WPC (USA)



