Caribbean - Central America Weather

[tropicana]

TRINIDAD UPDATE: Mon Mar 22 2010

DAY # 28 of Heatwave
Feb 23-Mar 22 *and counting... daily highs at or over 33.7C 93F, an unprecedented hot spell unusual even for the tropics

Afternoon temperatures on Monday soared to 34.3C 94F at Piarco Int. Airport, Trinidad as the weather continued to offer no sensible relief. Despite a few isolated showers crossing the Windward Islands, none of these showers reached the Trinidad shoreline.
Just 0.1mm of rain has fallen since Feb 4.

Additionally, the dewpoints at the airport dropped to 17C 62F early in the afternoon. Dewpoints this low and temperatures this high, combined with brisk winds, create ideal conditions for fast-spreading bushfires.
Since Feb 23, the temperature at Piarco Airport has reached or exceeded 33.7C 93F everyday, a period of 28 days, unprecedented even for the tropics.

[cycloneye]

Afternoon discussion by NWS San Juan

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
302 PM AST MON MAR 22 2010

.SYNOPSIS...AT UPPER LEVELS...HIGH PRESSURE WILL REMAIN OVER THE
CARIBBEAN AND NORTHERN SOUTH AMERICA.

AT MID LEVELS...HIGH PRESSURE WILL SHUTTLE ACROSS THE LEEWARD
ISLANDS FROM THE ATLANTIC TO THE CARIBBEAN AND BACK DURING THE
NEXT TEN DAYS.

AT LOWER LEVELS...A TROUGH WITH A WIND SURGE WILL BRING INCREASED
SHOWERS TO THE EASTERN CARIBBEAN. THIS THE NORTHERN PORTION OF
THIS DISTURBANCE WILL AFFECT THE U.S. VIRGIN ISLANDS AND THE
WINDWARD PORTION OF PUERTO RICO TONIGHT AND TOMORROW. DRIER
WEATHER WILL IMMEDIATELY FOLLOW. THE TRADE WINDS WILL SLOWLY GAIN
MOISTURE DURING THE REST OF THE WEEK AND INTO THE WEEKEND WITH
SOME MOISTURE PASSING FOR THE REST OF THE PERIOD. HIGH PRESSURE
DOMINATES THE CENTRAL ATLANTIC.


&&

.DISCUSSION...FEWER SHOWERS HAVE OCCURRED TODAY COMPARED TO
YESTERDAY AS MOISTURE AMOUNTS IN THE COLUMNAR ATMOSPHERE EDGED
DOWN FROM 1.27 INCHES TO 1.19 INCHES AT 12Z. THIS RESULTED IN LESS
SHOWERS MOVING ACROSS THE VIRGIN ISLANDS AND THE EASTERN PORTION
OF PUERTO RICO THIS MORNING AND EVEN LESS SHOWERS APPEARING IN THE
WEST THIS AFTERNOON SO FAR. A WIND SURGE HAS MOVED ACROSS THE
WINDWARD ISLANDS THIS MORNING WITH A FEW SHOWERS AND THE WEAKER
NORTHERN HALF IS POISED TO MOVE THROUGH THE LEEWARD ISLANDS THIS
EVENING EN ROUTE ACROSS THE U.S. VIRGIN ISLANDS TO EASTERN PUERTO
RICO TONIGHT AND EARLY TOMORROW MORNING. SHOWERS WILL PASS QUICKLY
AND WEDNESDAY LOOKS DRIER. WEDNESDAY AND THURSDAY WILL BE MOSTLY
DRY...BUT MOISTURE COMING IN PATCHES WILL INCREASE THROUGH THE
WEEKEND AS HIGH PRESSURE IN THE ATLANTIC BEGINS TO MOVE MORE
SLOWLY AWAY FROM THE LOCAL AREA. AS THIS HIGH PRESSURE SYSTEM IS
QUITE LARGE AND THE UPPER LEVEL PATTERN CHANGES LITTLE WITH A
RIDGE RETURNING TO A POSITION JUST EAST OF THE LOCAL ISLANDS...THE
WEATHER WILL CHANGE ONLY SLOWLY DURING THE NEXT 4 TO 7 DAYS.


&&

.AVIATION...
EXPECT PREVAILING VFR CONDITIONS ACROSS ALL THE LOCAL
TAF SITES FOR THE NEXT 12 HOURS. HOWEVER...VERY BRIEF MVFR
CONDITIONS ARE POSSIBLE OVER PARTS OF THE WESTERN SECTION OF PUERTO
RICO DURING THE AFTERNOON AND EARLY EVENING HOURS.

PATCHES OF LOW LEVEL MOISTURE EAST OF THE LESSER ANTILLES WILL MOVE
ACROSS TNCM AND TKPK THIS AFTERNOON...THEREFORE BRIEF MVFR
CONDITIONS...GUSTY WINDS AND ISOLATED TO SCATTERED SHOWERS ARE POSSIBLE.

&&

.MARINE...WINDS AND SEAS WILL INCREASE AS LOW LEVEL TROUGH
PASSES...LOOK FOR CONDITIONS TO SLOWLY IMPROVE AFTER FRIDAY.

[Gustywind]

I already posted this graphic in another thread,but I wanted to repost it in this thread as is for the members who live in the Caribbean islands.We have to be prepared because it looks like it will be an active season for this area of the basin.

[tropicana]

Regional Weather Round-up
Mon Mar 22 2010

Piarco, Trinidad 34.3C 94F
Crown Point, Tobago 32.6C 91F
Point Salines, Grenada 30.9C 88F 2.0mm
Grantley Adams, Barbados 31.7C 89F 3.3mm
Arnos Vale, St Vincent 31.5C 89F trace
Hewanorra, St Lucia 29.3C 85F 10.0mm
Vigie, St Lucia 30.2C 86F 10.4mm
Le Lamentin, Martinique 30.0C 86F 13.0mm
Le Raizet, Guadeloupe 31.4C 88F trace
VC Bird, Antigua 29.8C 86F 0.8mm
Golden Rock, St Kitts 30.2C 86F 0.6mm
San Juan, Puerto Rico 30.6C 87F trace

[Macrocane]

It's a cool and windy night in Central America The cool northerly winds continue to blow and thanks to them the maximum temperatures this afternoon were lower than yesterday (except for the eastern third of El Salvador). Today's max temps in some cities:

Santa Ana, El Salvador 30.5°C/86.9°F
San Salvador, El Salvador 31.6°C/88.9°F
Guatemala, Guatemala 24°C/75°F
Tegucigalpa, Honduras 26°C/79°F
Belice, Belice 27°C/81°F

In El Salvador the temperatures tonight are lower than yesterday's at the same time. Some examples

Santa Ana, last night: 26.2°C/79.2°F tonight: 23.1°C/73.6°F
San Salvador, last night: 25.3°C/77.5°F tonight: 23.6°C/74.5°F
Las Pilas, last night: 14.9°C/58.8°F tonight 12°C/53.6°F

[cycloneye]

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
932 PM AST MON MAR 22 2010

.UPDATE...NO CHANGES NEEDED TO FORECAST PACKAGE. FORECAST GRIDS
ARE ON TRACK ON CURRENT AND EXPECTED WEATHER SITUATION FOR NEXT 24
HOURS.

&&

.AVIATION...MAINLY VFR CONDITIONS NEXT 24 HRS BUT BRIEF TEMPORARY
REDUCTIONS IN CIGS ARE POSSIBLE AT JSJ TONIGHT AS BROKEN LOW CLOUDS
TO OUR EAST MOVE ACROSS THE AREA. WINDS WILL REMAIN UP FROM THE EAST
AROUND 10 KTS ALL SITES XCPT JPS/JMZ. XPCT WINDS TO INCREASE
TOMORROW MORNING WITH GUSTS AS HIGH AS 22 KTS POSSIBLE. BKN030
POSSIBLE AT JMZ TOMORROW AFTERNOON DUE TO POSSIBLE AFTERNOON
CONVECTION.

&&

.MARINE...SCEC STATEMENTS REMAIN IN EFFECT PRETTY MUCH EVERYWHERE
XCPT MONA PASSAGE AND OFFSHORE CARIBBEAN WATERS WHERE SCAS ARE IN
EFFECT MORE DUE TO THE WINDS THAN SEAS WHERE EARLIER ASCAT PASS
SHOWED SOLID 20-KT WINDS AND RECENT OBS AT BUOY 42060 INDICATED 20+
KT WINDS. SEAS REMAIN AROUND 2 METERS AT BUOYS 41043 TO THE NORTH
AND 42060 TO THE SOUTHEAST OF ST. CROIX.

.CLIMATE... A RECORD HIGH TEMPERATURE OF 88 DEGREES WAS SET AT CYRIL
E. KING AIRPORT/USVI TODAY. THIS TIES THE OLD RECORD OF 88 SET IN
1988.

[cycloneye]

Good morning to all.

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
526 AM AST TUE MAR 23 2010

.SYNOPSIS...QUICK PASSING LIGHT SHOWERS IN A BREEZY EASTERLY WIND
FLOW CAN BE EXPECTED TODAY. VERY LIMITED SHOWER ACTIVITY ALONG
WITH CONTINUED BREEZY EASTERLY WINDS ARE EXPECTED FOR THE
REMAINDER OF THE WEEK.

&&

.DISCUSSION...A PASSING BAND OF MOISTURE IS BRINGING SCATTERED
SHOWERS TO EASTERN PUERTO RICO AND SECTIONS OF THE LOCAL COASTAL
WATERS THIS MORNING. EXPECT THIS INCREASED MOISTURE TO AID IN THE
DEVELOPMENT OF ISOLATED SHOWERS OVER THE INTERIOR AND NORTHWESTERN
SECTIONS OF THE ISLAND THIS AFTERNOON.

WITH HIGH PRESSURE EXPECTED TO CONTINUE TO DOMINATE ALOFT AND
VERY LIMITED LOW LEVEL MOISTURE EXPECTED FOR THE REMAINDER OF THE
WEEK...LIMITED SHOWER ACTIVITY CAN BE EXPECTED TOMORROW THROUGH
THE UPCOMING WEEKEND. BEST CHANCE FOR ANY SHOWERS WILL BE ACROSS
THE COASTAL WATERS AND EASTERN SECTIONS OF PUERTO RICO DURING THE
LATE NIGHT AND EARLY MORNING HOURS...AS BREEZY WINDS ARE EXPECTED
TO CONTINUE FOR THE NEXT SEVERAL DAYS AND BREEZY EASTERLY WINDS
CLIMATOLOGICALLY TEND TO FOCUS SHOWER ACTIVITY ACROSS EASTERN
SECTIONS OF PUERTO RICO DURING THE OVERNIGHT HOURS.

&&

.AVIATION...EXPECT PREVAILING VFR CONDITIONS TO CONTINUE ACROSS THE
LOCAL ISLANDS AND AT ALL LOCAL TAF SITES FOR AT LEAST THE NEXT 24
HOURS. HOWEVER...VERY BRIEF MVFR CONDITIONS AND LOCAL MOUNTAIN
OBSCURATIONS ARE EXPECTED...ESPECIALLY OVER PARTS OF THE
NORTHEAST...INTERIOR AND WEST SECTIONS OF PUERTO RICO IN PASSING
SHRA. IN ADDITION...SURFACE WIND GUSTS TO 25 KNOTS ARE POSSIBLE...
ESPECIALLY NEAR AND IN SHOWERS.

[cycloneye]

Afternoon discussion by NWS San Juan

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
305 PM AST TUE MAR 23 2010

.SYNOPSIS...AT UPPER LEVELS...HIGH PRESSURE WILL CONTINUE OVER THE
CARIBBEAN AND NORTHERN SOUTH AMERICA UNTIL A WEAK TROUGH ENTERS
THE AREA LATE NEXT WEEK.

AT MID LEVELS...HIGH PRESSURE WILL NOT VENTURE FAR FROM THE LESSER
ANTILLES DURING THE NEXT 10 DAYS. A TROUGH WILL MOVE INTO THE
NORTHWEST CARIBBEAN LATE NEXT WEEK.

AT LOWER LEVELS...HIGH PRESSURE IN THE CENTRAL ATLANTIC NOW.
ANOTHER LESSER HIGH WILL ENTER THE WESTERN ATLANTIC ON WEDNESDAY
AND TRANSIT THE OCEAN MOVING EAST NORTHEAST DURING THE NEXT 7
DAYS.

&&

.DISCUSSION...EASTERLY FLOW AT LOWER LEVELS WILL PREVAIL THROUGH
THE ENTIRE WEEK WITH ONLY MODEST PATCHES OF MOISTURE THAT WILL
YIELD ONLY SCATTERED SHOWERS FROM TIME TO TIME DURING THE NEXT 7
TO 10 DAYS. THE GFS DOES SHOW A STRONG LONG WAVE TROUGH OVER THE
UNITED STATES THAT MAY ROTATE THROUGH THE AREA AFTER THE 10 DAY
PERIOD WHICH COULD MOVE A COLD FRONT THROUGH THE AREA...BUT THIS
IS TOO FAR OUT FOR ANY CONFIDENCE. IN THE MEANTIME
SHOWERS...YIELDING LIGHT AMOUNTS OF RAIN...WILL DEVELOP IN THE WESTERN
PORTIONS OF PUERTO RICO EACH AFTERNOON FOR SOME DAYS AND IN
EASTERN PUERTO RICO DURING THE EARLY MORNING HOURS.

&&

.AVIATION...
EXPECT PREVAILING VFR CONDITIONS ACROSS ALL THE LOCAL
TAF SITES FOR THE NEXT 24 HOURS...VERY BRIEF MVFR CONDITIONS ARE
POSSIBLE OVER TJMZ BETWEEN 23/18Z AND 23/23Z.

&&

.MARINE...SEAS WILL BEGIN TO DIMINISH SLOWLY OVERNIGHT AND
TOMORROW. SEAS ARE NOT EXPECTED TO RETURN TO THESE LEVELS IN THE
ATLANTIC UNTIL THE END OF THE MONTH. SEAS IN THE CARIBBEAN ARE NOT
EXPECTED TO REACH SMALL CRAFT ADVISORY CONDITIONS THROUGH THE END
OF THE MONTH.

[Macrocane]

HIGHEST TEMPERATURE OF THE YEAR IN EL SALVADOR REGISTERED TODAY! 40.2°C/104.4°F

Good evening. Today has been a very unusual day in El Salvador with a cool morning but a very warm afternoon.

In the western and central parts of the country we had a windy and cool morning with the lowest temperatures in two weeks, the winds ended before noon and then we had a very warm afternoon but the max temperatures didn't reach their highest points of the year.

In the eastern part they had a warm morning and a very hot afternoon. The max temperature in the city of San Miguel was the highest for the city and the country so far this year. This is not rare for this time of year as March and April are the warmest months in Central America. Some observations:

Santa Ana (Western part of the country)
min: 18.4°C/65.1°F max: 35.1°C/95.2°F

San Salvador (Central part of the country)
min: 18.1°C/64.6°F max: 32.8°C/91°F

Las Pilas (Northern El Salvador)
min: 10.1°C/50.2°F max: 25°C/77°F

San Miguel (eastern part of the country)
min: 24.7°C/76.5°F max: 40.2°C/104.4 °F

[Macrocane]

The temperatures in other centralamerican cities:

Guatemala, Guatemala
min: 12°C/54°F max: 30°C/86°F

Tegucigalpa, Honduras
min: 15°C/59°F max: 30°C/86°F

Managua, Nicaragua
min: 25°C/77°F max: 34°C/93°F

San Jose, Costa Rica
min: 21°C/69°F max: 28°C/82°F

Panama city, Panama
min: 24°C/75°F max: 34°C/93°F

[tropicana]

wow, San Miguel was really roasting today!!

Regional Weather Summary
Tue Mar 23 2010

Today's Highs and rain if any

Piarco, Trinidad 34.6C 95F 0.1mm ( was reporting a heavy shower at 11pm)
Crown Point, Tobago 31.2C 88F 1.4mm
Point Salines, Grenada 30.2C 86F 2mm
Grantley Adams, Barbados 31.9C 90F 0.6mm
Rockey, Barbados 31.7C 89F 0.8mm
Arnos Vale, St Vincent 30.7C 87F 18.3mm
Hato, Curacao 31.8C 89F
Queen Beatrix, Aruba 32.8C 91F
Flamingo, Bonaire 31.1C 88F
Hewanorra, St Lucia 31.2C 88F 5mm
Vigie, St Lucia 31.7C 89F 7mm
Melville Hall, Dominica 29.6C 86F 6.8mm
Le Lamentin, Martinique 31.2C 88F
Le Raizet, Guadeloupe 32.0C 90F
Golden Rock, St Kitts 30.6C 87F
VC Bird, Antigua 30.4C 86F
San Juan, Puerto Rico 31.7C 89F trace

-justin-

[cycloneye]

Good morning to all.No big changes in the weather pattern expected for the next few days.

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
437 AM AST WED MAR 24 2010

.SYNOPSIS...ALTHOUGH THE ALIGNMENT IS EXPECTED TO SHIFT
SLIGHTLY...A MID TO UPPER LEVEL RIDGE WILL REMAIN THE DOMINANT
WEATHER FEATURE LOCALLY FOR AT LEAST THE NEXT SEVERAL DAYS...
MAINTAINING A GENERALLY FAIR AND MAINLY DRY WEATHER PATTERN
ACROSS THE LOCAL ISLANDS.

&&

.DISCUSSION...THE COMBINATION OF AFOREMENTIONED HIGH PRESSURE...
ASSOCIATED SUBSIDENCE AND A RELATIVELY DRY AIR MASS...SHOULD
RESULT IN A CONTINUATION OF GENERALLY FAIR AND MAINLY DRY WEATHER
ACROSS THE LOCAL ISLANDS FOR THE NEXT SEVERAL DAYS. THAT SAID...
SMALL PATCHES AND BANDS OF MOISTURE WILL MOVE ACROSS THE LOCAL
AREA FROM TIME TO TIME AND WILL INTERACT WITH LOCAL EFFECTS...TO
PRODUCE INTERVALS OF CLOUDS AND A FEW SHOWERS. THE BEST CHANCES OF
MEASURABLE RAINFALL APPEAR TO BE OVER PARTS OF INTERIOR AND WEST
PUERTO RICO DURING THE AFTERNOONS...AND POSSIBLY MORE AREA-WIDE
SUNDAY...AS A BIT MORE IMPRESSIVE CHUNK OF MOISTURE IS FORECAST TO
MOVE ACROSS THE FA...AT ROUGHLY THE SAME TIME THAT A WEAK MID
LEVEL SHORT WAVE TOPS THE RIDGE AND PASSES ACROSS OF JUST NORTH OF
THE LOCAL AREA.

FOR TODAY...GFS AND NAM BOTH SHOW SURFACE WINDS BECOMING MORE EAST
SOUTHEAST TO SOUTHEAST...AND ALTHOUGH LOCAL SEA BREEZES SHOULD
OCCUR...WOULD EXPECT THE TEMPERATURE AT THE SAN JUAN LUIS MUNOZ
MARIN AIRPORT TO REACH 90 OR 91 DEGREES...ESPECIALLY GIVEN THE
FACT THAT IT WAS 89 DEGREES YESTERDAY WITH A STRONG SEA BREEZE!
THE RECORD FOR TODAY (3/24) IS 92 DEGREES SET IN 2005 AND ALTHOUGH
WE PROBABLY WONT QUITE MAKE IT...WE WILL STILL EXPERIENCE YET
ANOTHER UNSEASONABLY WARM...WELL ABOVE NORMAL DAY AT NORTH COASTAL
LOCATIONS...ESPECIALLY COMBINED WITH A MORNING LOW OF ABOUT 76
DEGREES. THE CLIMATE NORMALS FOR THIS DATE ARE 84/72.

A REMINDER FOR TODAY...A TSUNAMI DRILL (LANTEX) WILL BE CONDUCTED
LOCALLY. THE NATIONAL WEATHER SERVICE IN COORDINATION WITH THE
PUERTO RICO EMERGENCY MANAGEMENT AGENCY...THE PUERTO RICO SEISMIC
NETWORK AND THE STATE EMERGENCY COMMUNICATIONS COMMITTEE EAS ARE
PERFORMING A TEST OF A TSUNAMI ALERT. THIS IS NOT A REAL
SITUATION...BUT RATHER JUST AN EXERCISE.

&&

.AVIATION...EXPECT PREVAILING VFR CONDITIONS TO CONTINUE ACROSS
THE LOCAL ISLANDS AND AT ALL LOCAL TAF SITES THROUGH AT LEAST THE
NEXT 24 HOURS.

&&

.MARINE...GENERALLY EXPECT WINDS OF 17 KNOTS OR LESS AND SEAS OF
3 TO 7 FEET ACROSS THE REGIONAL WATERS THROUGH FRIDAY AND PROBABLY
BEYOND. A SMALL CRAFT ADVISORY REMAINS IN EFFECT FOR PARTS OF THE
ATLANTIC OFF SHORE WATERS THROUGH NOON AST TODAY...OTHERWISE
SMALL BOAT OPERATORS SHOULD EXERCISE CAUTION ACROSS MOST OF THE
LOCAL COASTAL WATERS TODAY.

[Macrocane]

After a period of southerly winds during yesterday afternoon the northerly winds returned last night and at this time they persist. Although in most of the country the temperatures this morning were a little higher than yesterday in San Miguel they experienced a decrease. These are the minimum temperatures registered this morning in some cities.

Santa Ana 18.7°C/65.7°F
San Salvador 19.8°C/67.6°F
San Miguel 22°C/71.6°F
Las Pilas 10.4°C/50.7°F

In Guatemala and Honduras the minimum temperatures were also higher than yesterday but in Nicaragua and Costa Rica they were lower, it seems that the cold front effects were registered yesterday from Guatemala to western El Salvador and today from eastern El Salvador to Costa Rica:

Guatemala,Guatemala 14°C/57°F
Tegucigalpa, Honduras 17°C/63°F
Managua, Nicaragua 22°C/72°F
San Jose, Costa Rica 19°C/66°F

[tropicana]

TRINIDAD UPDATE: Wed Mar 24 2010

DAY # 30 of Heatwave
Feb 23-Mar 24 *and counting... daily highs at or over 33.7C 93F, an unprecedented hot spell unusual even for the tropics

Temperatures at Piarco Airport reached 34.0C 93F on Wednesday afternoon, continuing a heatwave now in its 30th day.
But a significant but heavy shower fell at the Airport near 11pm Tuesday night, producing a quick 4.3 mm of rain, the most sizeable rain that has fallen at the airport since January 29, bringing the month's total to 4.5mm..still well below average.
Pointe-a-Pierre district saw 3.3mm overnight.

Predominantly hazy and smokey conditions continued on Trinidad today, though there were a few brisk isolated showers in spots.
Since Feb 23, the temperature at Piarco Airport has reached or exceeded 33.7C 93F everyday, a period of 30 days, unprecedented even for the tropics.

[cycloneye]

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
258 PM AST WED MAR 24 2010

.SYNOPSIS...SURFACE HIGH PRESSURE ACROSS THE CENTRAL ATLANTIC WILL
CONTINUE TO PRODUCE STABLE AND DRY CONDITIONS ACROSS THE REGION
THROUGH AT LEAST SATURDAY.

&&

.DISCUSSION...THE DOPPLER RADAR ONLY SHOWED A FEW ISOLATED SHOWERS
ACROSS THE WESTERN PORTIONS OF PUERTO RICO BUT NO SIGNIFICANT
RAINFALL ACCUMULATIONS WERE REPORTED. MOST OF THESE SHOWERS WILL
DISSIPATE BEFORE SUNSET. CLEAR CONDITIONS WILL PREVAIL ACROSS THE
LOCAL ISLANDS TONIGHT.

STABLE AND DRY CONDITIONS WILL PREVAIL THROUGH AT LEAST ON
SATURDAY AS HIGH PRESSURE WILL DICTATE THE WEATHER CONDITIONS
ACROSS THE LOCAL FORECAST AREA. ON SATURDAY...A SLIGHT INCREASE ON
LOW LEVEL MOISTURE WILL MOVE FROM THE SOUTH AND IN COMBINATION
WITH A SHORT WAVE AT MID LEVELS WILL INCREASE THE SHOWER COVERAGE
ACROSS THE ISLAND OF PUERTO RICO. AFTER SUNDAY ONCE AGAIN A HIGH
PRESSURE WILL BUILD OVER THE REGION GENERATING A STABLE AND DRY
CONDITIONS THROUGH MID WEEK.

&&

.AVIATION...EXPECT PREVAILING VFR CONDITIONS ACROSS ALL THE
LOCAL TAFS SITES FOR THE NEXT 24 HOURS.

&&

.MARINE...SEAS WILL CONTINUE TO SUBSIDE IN THE NEXT 12 HOURS
THEREFORE MARINER SHOULD EXERCISE CAUTION ACROSS THE LOCAL
ATLANTIC OFF SHORE WATERS AND ALL PASSAGES. NO SIGNIFICANT SWELL
EVENT IS EXPECTED UNTIL TUESDAY.

[tropicana]

Regional Weather Summary
Wed Mar 24 2010

Today's Highs and rain if any

Piarco, Trinidad 34.0C 94F 4.3mm *most rain since Jan 29
Crown Point, Tobago 31.7C 89F
Point Salines, Grenada 31.1 88F trace
Grantley Adams, Barbados 31.5C 89F
Arnos Vale, St Vincent 30.9C 88F 5.9mm
Hewanorra, St Lucia 31.1C 88F 0.5mm
Melville Hall, Dominica 30.5C 87F 0.3mm
Le Lamentin, Martinique 31.1C 88F
Le Raizet, Guadeloupe 32.8C 91F
Golden Rock, St Kitts 30.2C 86F
VC Bird, Antigua 30.5C 87F
San Juan, Puerto Rico 31.1C 88F

[cycloneye]

Good morning to all.The warmest March ever in San Juan? Read the last paragraph.

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
445 AM AST THU MAR 25 2010

.SYNOPSIS...GENERALLY FAIR AND DRY WEATHER IS EXPECTED TO PREVAIL
ACROSS THE LOCAL ISLANDS THROUGH THE UPCOMING WEEKEND AS HIGH
PRESSURE CONTINUES TO SUPPRESS THE FORMATION OF ANY SIGNIFICANT
SHOWER ACTIVITY.

&&

.DISCUSSION...NOT A WHOLE LOT TO SAY. MID LEVEL HIGH PRES WILL
CONTINUE TO DOMINATE THE REGION INTO NEXT WEEK. GUIDANCE SHOWS
PWAT VALUES REMAINING NEAR NORMAL FOR THIS TIME OF THE YEAR WITH
VALUES BETWEEN 1.0-1.5 INCHES. IN ABSENCE OF ANY SYNOPTIC FEATURES
TO TRIGGER SIGNIFICANT WEATHER...SEA BREEZE CONVERGENCE WILL BE
THE MAIN WEATHER FOCUSING MECHANISM...WITH ISOLATED AFTERNOON
CONVECTION POSSIBLE OVER WESTERN PUERTO RICO EACH AFTERNOON AND A
FEW NOCTURNAL SHOWERS EXPECTED ACROSS THE U.S. VIRGIN ISLANDS AND
EASTERN SECTIONS OF PUERTO RICO. THE LATEST GFS IS INDICATING A
SLIGHT INCREASE IN MOISTURE COMING ACROSS THE LESSER ANTILLES LATE
IN THE UPCOMING WEEKEND...WHICH MAY HELP AID IN AFTERNOON SHOWER
DEVELOPMENT OVER THE INTERIOR OF PR BOTH SATURDAY AND SUNDAY...BUT
STILL DO NOT EXPECT A SIGNIFICANT INCREASE IN SHOWER ACTIVITY AT
THIS TIME.

&&

.AVIATION...POSSIBLE MVFR CIGS AT JMZ THIS AFTERNOON WITH
CONVECTION IN WRN PR OTHERWISE VFR CONDITIONS EXPECTED AT ALL
OTHER SITES FOR THE NEXT 24 HOURS WITH NO SIGNIFICANT WX THE NEXT
FIVE DAYS.

&&

.MARINE...SEAS GENERALLY 3-5 FT ARE EXPECTED ACROSS THE UNPROTECTED
WATERS THROUGH THE WEEKEND. MARINE MODELS INDICATE MODERATE LONG
PERIOD NORTH SWELLS WILL BUILD ACROSS THE LOCAL ATLANTIC WATERS
AND CARIBBEAN PASSAGES EARLY NEXT WEEK.

&&

.CLIMATE...CONTINUED ABOVE NORMAL TEMPERATURES ARE EXPECTED ACROSS
THE LOCAL ISLANDS THROUGH THE END OF THE MONTH...WHICH WILL HELP
TO MAKE MARCH 2010 ONE OF THE WARMEST MONTHS ON RECORD ACROSS THE
SAN JUAN METROPOLITAN AREA. EVEN WITH ALL THE COOL WEATHER WE HAD FROM
THE 6TH TO 11TH OF THE MONTH...MONTH TO DATE...THE AVERAGE TEMPERATURE
AT THE LUIS MUNOZ MARIN INTERNATIONAL AIRPORT IS STILL 2.8 DEGREES
ABOVE NORMAL FOR THE MONTH OF MARCH.

[cycloneye]

Afternoon discussion by NWS San Juan


AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
214 PM AST THU MAR 25 2010

.SYNOPSIS...FAIR WEATHER AND WARMER THAN NORMAL TEMPERATURES WILL
CONTINUE ACROSS THE FA DURING THE NEXT SEVERAL DAYS AS HIGH PRESSURE
CONTINUES TO BE THE MAIN WEATHER FEATURE ACROSS THE REGION.
HOWEVER...A SLIGHT INCREASE IN MOISTURE WILL OCCUR LATE DURING THE
UPCOMING WEEKEND...BUT NO WIDESPREAD SHOWER ACTIVITY IS EXPECTED.

&&

.DISCUSSION...HIGH PRESSURE WILL CONTINUE TO DOMINATE THE LOCAL
AREA...RESULTING IN GENERALLY FAIR AND MAINLY DRY WEATHER ACROSS THE
LOCAL ISLANDS FOR THE NEXT SEVERAL DAYS. THE SEA BREEZE CONVERGENCE
WILL PROMOTE ONLY A FEW SHOWERS EACH AFTERNOON ACROSS WESTERN AND
INTERIOR PUERTO RICO. SOME NOCTURNAL SHOWERS ARE ALSO EXPECTED
ACROSS EASTERN SECTIONS OF PUERTO RICO AND ACROSS THE U.S. VIRGIN
ISLANDS AND THE SURROUNDING COASTAL WATERS. MODEL GUIDANCE SUGGESTS
A SLIGHT INCREASE IN LOW LEVEL MOISTURE LATE DURING THE UPCOMING
WEEKEND AS SOME PATCHES OF CLOUDINESS MOVE ACROSS THE LOCAL ISLANDS
FROM THE EAST. LOOKING WELL AHEAD...A GENERAL INCREASE IN LOW LEVEL
MOISTURE IS EXPECTED DURING THE FIRST DAYS OF THE UPCOMING MONTHS AS
A FRONTAL BOUNDARY APPROACHES THE REGION.

&&

.AVIATION...EXPECT PREVAILING VFR CONDITIONS ACROSS ALL THE LOCAL
TAFS SITES FOR THE NEXT 24 HOURS. LOW LEVEL MOISTURE FROM THE
NORTHEAST MAY CAUSE PASSING SHOWERS AND LOW CEILINGS OVER TNCM AND
TIST LATE THIS AFTERNOON AND DURING THE EVENING HOURS.

&&

.MARINE...SEAS GENERALLY 3-5 FT ARE EXPECTED ACROSS THE UNPROTECTED
WATERS THROUGH THE WEEKEND. MARINE MODELS INDICATE MODERATE LONG
PERIOD NORTH SWELLS WILL BUILD ACROSS THE LOCAL ATLANTIC WATERS AND
CARIBBEAN PASSAGES EARLY NEXT WEEK.

[Gustywind]

[tropicana]

TRINIDAD UPDATE: Thu Mar 25 2010

DAY # 31 of Heatwave
Feb 23-Mar 25 *and counting... daily highs at or over 33.7C 93F, an unprecedented hot spell unusual even for the tropics

Isolated showers on Trinidad today held temperatures down slightly in spots that received the rain, but Piarco Airport in Central Trinidad was not one of them and temperatures soared to 35.1C 95F on Thursday afternoon, continuing the heatwave now in its 31st day.
NW Trinidad saw it's first sizeable rainfall in 2 months, with 2.5mm measured at Maraval. Late afternoon skies were murky and hazy in the west.
Across the eastern Caribbean, showers also fell in St Vincent (over 9mm at Arnos Vale) and St Lucia (Vigie Airport saw 10mm) There were reliable reports of very heavy rain in Martinique this morning.

Since Feb 23, the temperature at Piarco Airport has reached or exceeded 33.7C 93F everyday, a period of 31 days, unprecedented even for the tropics.