Caribbean - Central America Weather

[Macrocane]

Heavy showers and strong wind gusts affected Antiguo Cuscatlan (where I live) and other towns west of San Salvador this afternoon, at this moment the rains and the winds are less intense I will keep you updated if some flash floods or mudslides occured.

[abajan]

Satellite imagery hardly shows any clouds in our vicinity but out of the blue (or rather out of the dust, compliments of SAL) Barbados is experiencing thunderstorms! Here the temperature has fallen quite noticeably and we had pretty strong breezes about 30 minutes ago.

I’d better sign out for now because the last clap of thunder was pretty loud and I don’t want to risk electrical damage to my computer.

[cycloneye]

FLOOD ADVISORY
NATIONAL WEATHER SERVICE SAN JUAN PR
847 PM AST SAT JUL 10 2010

PRC029-031-037-053-087-089-103-119-127-139-110245-
/O.NEW.TJSJ.FA.Y.0263.100711T0047Z-100711T0245Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TRUJILLO ALTO PR-LUQUILLO PR-NAGUABO PR-CEIBA PR-CANOVANAS PR-
FAJARDO PR-CAROLINA PR-SAN JUAN PR-LOIZA PR-RIO GRANDE PR-
847 PM AST SAT JUL 10 2010

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED AN

* URBAN AND SMALL STREAM FLOOD ADVISORY FOR MINOR FLOODING OF POOR
DRAINAGE AREAS IN
FOR THE FOLLOWING MUNICIPALITIES...

IN PUERTO RICO
TRUJILLO ALTO...LUQUILLO...NAGUABO...CEIBA...CANOVANAS...
FAJARDO...CAROLINA...SAN JUAN...LOIZA AND RIO GRANDE

* UNTIL 1045 PM AST

* AT 844 PM AST DOPPLER RADAR ESTIMATED MODERATE TO HEAVY RAIN IN
THE ADVISORY AREA. THE ASSOCIATED SHOWERS AND THUNDERSTORMS WILL
CONTINUE TO MOVE ACROSS THESE AREAS THROUGH 1045 PM.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

[cycloneye]

Good morning. Here comes the dust again.

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
538 AM AST SUN JUL 11 2010

.SYNOPSIS...AT UPPER LEVELS...A TUTT LOW NORTHEAST OF THE LEEWARD
ISLANDS WILL PULL NORTH THROUGH MONDAY. ON TUESDAY IT WILL FORM A
NEW LOBE NORTH OF SAINT THOMAS THAT WILL DRIFT WEST TO FLORIDA BY
THE WEEKEND. FLOW REMAINS LESS THAN 20 KNOTS OVER THE FORECAST AREA.

AT MID LEVELS...A LOW NORTH OF THE LEEWARD ISLANDS WILL DISSIPATE
BY MONDAY. HIGH PRESSURE IN THE CENTRAL ATLANTIC WILL MOVE INTO
THE WESTERN ATLANTIC LATE IN THE WEEK AND FORM A TRANS ATLANTIC
RIDGE FROM NORTH CAROLINA TO WESTERN SAHARA.

AT LOWER LEVELS...THE TROPICAL WAVE THAT PASSED THROUGH PUERTO
RICO OVERNIGHT IS NOW NEAR PUNTA CANA AND SET TO PASS THROUGH THE
DOMINICAN REPUBLIC TODAY. AN AREA OF DIFFUSE DUST FOLLOWS THE WAVE
BUT THE HIGHER CONCENTRATIONS ARE NOT FORECAST TO ARRIVE UNTIL
TUESDAY. MODELS STILL BRING IN A TROPICAL WAVE...CURRENTLY NEAR 33
WEST...ON WEDNESDAY.

&&

.DISCUSSION...THE TROPICAL WAVE SUFFERED CONSIDERABLY AFTER HAVING
PASSED THROUGH THE AXIS OF THE TUTT YESTERDAY AND PROVIDED ONLY
SPOTTY SHOWERS AND THUNDERSTORMS...MAINLY OVER EASTERN PUERTO
RICO DUE TO ITS LATE ARRIVAL. VERY FEW SHOWERS ARE PRESENT ON
RADAR AND HAVE LOWERED THE MORNING POPS A FULL CATEGORY. DESPITE A
MIMIC PRODUCT GLITCH...THE NEXT WEAK BAND OF MOISTURE WAS VISIBLE
AND SHOULD MOVE THROUGH THE AREA TODAY ARRIVING IN MAYAGUEZ BY
11/21Z. THIS SHOULD ENHANCE AFTERNOON SHOWER ACTIVITY FROM WHAT
WOULD NORMALLY BE EXPECTED BEHIND A TROPICAL WAVE PASSAGE.
OTHERWISE SHOWER ACTIVITY OVER THE REST OF THE AREA SHOULD BE
MINIMAL. THE NEXT WAVE IS VERY UNIMPRESSIVE IN THE SATELLITE...BUT
THE GFS SHOWS MOISTURE ASSOCIATED WITH IT AT 700 MB DEVELOPING AS
IT APPROACHES THE AREA...SO IT SHOULD BE ABLE TO INCREASE THE
SHOWER ACTIVITY THEN. A SURGE WITH MORE MOISTURE FOLLOWS ON FRIDAY.
WAVE AND SURGE MAINTAIN THE TRADE WIND FLOW STRONGER THAN USUAL
BEGINNING MONDAY AND CONTINUING THROUGH MUCH OF THE WEEK. ANOTHER
WAVE IS DUE LATE MONDAY...19 JULY...BUT MODELS DO NOT SEEM TO
DEVELOP THIS. TEMPERATURES ON THE NORTHEAST COAST ARE FORECAST TO
BE IN THE 90S TODAY...BUT COOL SOMEWHAT IN SAN JUAN ON MONDAY AND
THE REST OF THE WEEK AS 1000-850 MB THICKNESSES DROP AND SEA
BREEZE INFLUENCE RETURNS.

&&

.AVIATION...
AFTERNOON CONVECTION WILL OCCUR ACROSS PARTS OF THE INTERIOR AND
WESTERN PR. TSRA WILL AFFECT THE FLIGHT AREA ACROSS TJMZ AND
TJBQ...PRODUCING BRIEF MVFR OR EVEN IFR CONDS AT THESE SITES
BETWEEN 11/17Z TO 11/22Z. MOUNTAINS OBSCURATION ACROSS THE
INTERIOR SECTIONS OF PR WILL ALSO BE LIKELY. ELSEWHERE...EXPECT
VFR CONDITIONS WITH SOME VCSH AND SCT CLOUDS. LLVL WNDS WILL
PREVAIL FROM THE EAST AT 10 TO 15 KTS.

&&

.MARINE...THE CENTRAL ATLANTIC HIGH WILL BUILD AND ITS FOCUS WILL
SHIFT WEST SOUTHWEST DURING THE WEEK TIGHTENING PRESSURE GRADIENTS
OVER THE AREA. THIS WILL INCREASE THE TRADE WIND FLOW SO SEAS ARE
EXPECTED TO INCREASE BOTH IN THE ATLANTIC AND THE CARIBBEAN...WITH
7 FOOT SEAS LIKELY IN THE OUTER ATLANTIC WATERS AS EARLY AS
TOMORROW AFTERNOON.

[cycloneye]

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
411 PM AST SUN JUL 11 2010

.SYNOPSIS...TUTT LOW LOCATED JUST NORTHEAST OF THE LOCAL AREA WILL
CONTINUE LIFTING NORTHEAST AND FILLING TONIGHT AND MONDAY...BUT
OVERALL TUTT AXIS WILL GENERALLY REMAIN LOCATED WEST THROUGH NORTH
OF THE LOCAL ISLANDS MONDAY NIGHT THROUGH WEDNESDAY OR THURSDAY.
AT THE SAME TIME...STRONG MID LEVEL RIDGING WILL BECOME ELONGATED
ACROSS THE ATLANTIC TO OUR NORTH MONDAY THROUGH AT LEAST FRIDAY.

&&

.DISCUSSION...AN AREA OF MOISTURE WILL MOVE INTO THE LOCAL AREA
LATER TONIGHT AND MONDAY AND WILL INTERACT WITH LOCAL EFFECTS AND
GENERALLY FAVORABLE UPPER LEVEL CONDITIONS...TO PRODUCE SOME
CLOUDINESS...SHOWERS AND A COUPLE OF THUNDERSTORMS OVER PARTS OF
THE LOCAL ISLANDS. ENOUGH MOISTURE WILL LINGER FOR TUESDAY...TO
PRODUCE SOME ADDITIONAL CLOUDINESS...SHOWERS AND THUNDERSTORMS
BEFORE ADDITIONAL MOISTURE ASSOCIATED WITH A LOW TO MID LEVEL
INVERTED TROUGH AND A WIND SURGE MOVE ACROSS THE LOCAL AREA
TUESDAY NIGHT AND WEDNESDAY...RESULTING IN ADDITIONAL
CLOUDINESS...SHOWERS AND THUNDERSTORMS.

&&

.AVIATION...EXPECT PREVAILING VFR CONDITIONS ACROSS THE LOCAL
ISLANDS AND AT ALL LOCAL TAF SITES TONIGHT. HOWEVER...BRIEF MVFR
CONDITIONS AND LOCAL MOUNTAIN OBSCURATIONS ARE POSSIBLE IN
SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS.

&&

.MARINE...EXPECT WINDS OF 12 TO 20 KNOTS AND SEAS OF 3 TO 8 FEET
ACROSS THE REGIONAL WATERS THROUGH AT LEAST TUESDAY. SMALL BOAT
OPERATORS SHOULD EXERCISE CAUTION ACROSS THE LOCAL ATLANTIC AND
CARIBBEAN OFF SHORE WATERS AND THE ANEGADA PASSAGE TONIGHT. A
SMALL CRAFT ADVISORY IS SCHEDULED TO GO INTO EFFECT FOR THE
ATLANTIC OFF SHORE WATERS MONDAY AFTERNOON.

&&

[cycloneye]

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN JUAN PR
1020 PM AST SUN JUL 11 2010

...SEAS WILL GRADUALLY INCREASE AND PRODUCE HAZARDOUS SEAS
DURING THE UPCOMING WEEK...

.STRONG SURFACE HIGH PRESSURE WILL CONTINUE TO BUILD ACROSS THE
NORTH CENTRAL ATLANTIC DURING THE NEXT FEW DAYS...AND EXTEND SOUTH
SOUTHWEST INTO THE NORTHEAST CARIBBEAN...MAINTAINING A MODERATE
TO FRESH TRADE WIND FLOW ACROSS THE REGIONAL WATERS. THIS IN TURN
WILL CAUSE INCREASINGLY ROUGH AND HAZARDOUS SEAS ACROSS THE LOCAL
ATLANTIC OFF SHORE WATERS.

AMZ710-121030-
/O.CON.TJSJ.SC.Y.0044.100712T1600Z-100715T1000Z/
ATLC WATERS OF PUERTO RICO AND USVI FROM 10NM TO 19.5N-
1020 PM AST SUN JUL 11 2010

...SMALL CRAFT ADVISORY WILL BE IN EFFECT FROM NOON MONDAY TO 6 AM
AST THURSDAY...

A SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS REMAINS IN EFFECT FROM
NOON MONDAY TO AT LEAST 6 AM AST THURSDAY DUE TO THE INCREASING
TRADE WINDS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SMALL CRAFT ADVISORY MEANS THAT WINDS OF 22 TO 33 KNOTS AND
SEAS OF 7 FEET AND GREATER ARE EXPECTED TO PRODUCE HAZARDOUS
MARINE CONDITIONS FOR SMALL CRAFT. INEXPERIENCED MARINERS...
ESPECIALLY THOSE OPERATING SMALLER VESSELS...SHOULD AVOID
NAVIGATING IN THESE CONDITIONS.

[cycloneye]

Good morning.

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
354 AM AST MON JUL 12 2010

.SYNOPSIS...STRONG SURFACE HIGH PRESSURE WILL CONTINUE TO BUILD FROM
THE NORTH CENTRAL ATLANTIC SOUTHWEST INTO THE NORTHEAST CARIBBEAN
THROUGH AT LEAST WEDNESDAY...CREATING A MODERATE TO FRESH TRADE
WIND FLOW.

&&

.DISCUSSION...ISOLATED TO SCATTERED SHOWERS CONTINUE TO MOVE ON
SHORE AND AFFECT THE EASTERN COASTAL SECTIONS O PUERTO RICO.
ALTHOUGH MOST OF THESE SHOWERS WERE QUICK AND SHORT...THEY
GENERATED MODERATE TO HEAVY DOWNPOURS ACROSS THE SAN JUAN METRO AREA.
SATELLITE IMAGES AREA SHOWING MORE PATCHES OF LOW LEVEL MOISTURE
UP STREAM THEREFORE THIS WEATHER SCENARIO WILL CONTINUE DURING THE
OVERNIGHT HOURS. THIS INFLUX OF LOW LEVEL MOISTURE WILL COMBINE
WITH THE LOCAL EFFECTS AND GENERATE SHOWERS AND THUNDERSTORMS
ACROSS THE INTERIOR WEST AND SOUTHWEST PORTIONS OF PUERTO RICO
THIS AFTERNOON.

A TROPICAL WAVE NOW LOCATED AT AROUND 40 W WILL CONTINUE TO MOVE
WEST AND IS FORECAST TO REACH OUR LOCAL WATERS ON WEDNESDAY.

&&

.AVIATION...VFR CONDITIONS WILL PREVAIL AT ALL LOCAL TAF SITES
THROUGH THE NEXT 24 HOURS. HOWEVER...AFTERNOON CONVECTION IS
POSSIBLE ONCE AGAIN ACROSS PARTS OF THE INTERIOR AND WESTERN PR.
THIS TSRA ACTIVITY WILL PRODUCE TEMPO MVFR OR EVEN IFR CONDS ACROSS
TJMZ AND TJBQ FROM 12/17Z-12/22Z. LLVL WINDS WILL PREVAIL FROM THE
EAST NORTHEAST AT 10 TO 20 KTS.

&&

.MARINE...MODERATE TO FRESH TRADE WIND FLOW WILL CONTINUE THROUGH
MOST OF THE WEEK. THIS WILL PRODUCE INCREASINGLY ROUGH AND
HAZARDOUS SEAS ACROSS MUCH OF THE REGIONAL WATERS FOR THE NEXT
SEVERAL DAYS.

[alanstover]

Does anyone have time sometime to explain to me some of the symbols on the sfc maps? What do the colored lines represent?

Why does this map show the tropical wave over CA while the invest is off-shore?

http://www.nhc.noaa.gov/tafb_latest/EPAC_latest.gif

Thanks for any explanation.

-alan

[cycloneye]

Does anyone have time sometime to explain to me some of the symbols on the sfc maps? What do the colored lines represent?

Why does this map show the tropical wave over CA while the invest is off-shore?

http://www.nhc.noaa.gov/tafb_latest/EPAC_latest.gif

Thanks for any explanation.

-alan

Hi from Puerto Rico. The colored lines represent where is the ITCZ located. The tropical wave extends from north to south from Central America to well south of 10N and in between is invest 96E. The map does not have a low yet attached to the invest because it has not formed a well defined low.

[alanstover]

Thanks for the helpful explanation.
I´m learning a lot on this board!

[cycloneye]

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
310 PM AST MON JUL 12 2010

.SYNOPSIS...LAST PULSE OF MOISTURE IS ON ITS WAY TONIGHT INTO
PUERTO RICO AND THE U.S. VIRGIN ISLANDS. A WEAK TROPICAL WAVE IS
NEAR 45 WEST WITH LITTLE CONVECTION AT OUR LATITUDE. THE WAVE WILL
PASS THROUGH THE AREA ON WEDNESDAY NIGHT. A SECOND WAVE NEAR 25
WEST IS EXPECTED ON FRIDAY.

&&

.DISCUSSION...DRIER AIR ALOFT AND EAST NORTHEAST FLOW HAS
CONTRIBUTED TO STREAMERS OFF THE ISLANDS AND THUNDERSTORMS OVER
SOUTHWEST PUERTO RICO. WITH NORTHEAST FLOW EXPECT SCATTERED
SHOWERS OVER MUCH OF THE WINDWARD COASTS AND OVER THE U.S VIRGIN
ISLANDS TONIGHT FOLLOWED BY SIMILAR OR SLIGHTLY LESS CONVECTION
TUESDAY AND WEDNESDAY. WINDS IN THE 850 MB GFS SURGE OVERNIGHT
WEDNESDAY AND MOISTURE ARRIVES SOMEWHAT BEFORE THEN SO TIMING OF
WAVE FOR WEDNESDAY NIGHT STILL APPROXIMATELY ON TARGET. BUBBLES OF
MOISTURE CONTINUE THROUGH FRIDAY UNTIL THE NEXT WAVE. WEAK UPPER
LEVEL LOW TO THE NORTHWEST OF THE AREA PROMISES TO HELP CONVECTION
TO A SLIGHT EXTENT WEDNESDAY...OTHERWISE UPPER LEVEL RIDGING
PREVAILS.

&&

.AVIATION...
VFR CONDITIONS WILL PREVAIL AT ALL LOCAL TAF SITES
THROUGH THE NEXT 24 HOURS. HOWEVER...AFTERNOON CONVECTION IS
POSSIBLE ONCE AGAIN ACROSS PARTS OF THE INTERIOR AND WESTERN PR.
THIS TSRA ACTIVITY WILL PRODUCE TEMPO MVFR ACROSS TJMZ FROM
12/17Z-12/22Z. LLVL WINDS WILL PREVAIL FROM THE EAST NORTHEAST AT
10 TO 20 KTS.

&&

.MARINE...ROUGH SEAS WILL SPREAD INTO MOST EXPOSED MARINE ZONES AS
WINDS FROM THE HIGH PRESSURE INCREASE. SMALL CRAFT ADVISORIES FOR
SOME AREAS WILL LAST MOST OF THE WEEK.

[Macrocane]

It was a very wet weekend in El Salvador, the SNET has said that muslides could occur in several places including San Salvador volcano. Yesterday (July 12 2010) rainfall and temperatures:

Rainfall

Santa Cruz Porrillo 105.1 mm/4.14 inches
Ataco 85 mm/3.35 inches
Cojutepeque 83.6 mm/3.29 inches
Ilopango 81.2 mm/3.20 inches
San Andres 65 mm/2.56 inches
San Salvador 36 mm/1.42 inches
San Miguel 20 mm/0.79 inches


Temperatures

Code: Select all

Acajutla         min:22.4°C/72.3°F      max:30.9°C/87.6°F
Santa Ana        min:20.1°C/68.2°F      max:30.5°C/86.9°F
San Salvador     min:20.4°C/68.7°F      max:30.0°C/86.0°F
Las Pilas        min:14.1°C/57.4°F      max:20.6°C/69.1°F
San Miguel       min:22.7°C/72.9°F      max:34.1°C/93.4°F


[cycloneye]

Good morning.

AFDSJU

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
433 AM AST TUE JUL 13 2010

.SYNOPSIS...A PULSE OF MOISTURE WILL CONTINUE TO MOVE ACROSS THE
LOCAL FORECAST AREA TODAY. A WEAK TROPICAL WAVE IS NEAR 48 WEST
WITH LITTLE CONVECTION AT OUR LATITUDE. THE WAVE WILL PASS THROUGH
THE AREA ON WEDNESDAY NIGHT. A SECOND WAVE NEAR 30 WEST IS EXPECTED
ON FRIDAY.

&&

.DISCUSSION...IR SATELLITE AND RADAR IMAGERY SHOWED A NORTH-SOUTH
ORIENTED BAND OF LOW TO MID LEVEL MOISTURE MOVING ACROSS THE
NORTHERN U.S. VIRGIN ISLANDS. THIS IS ASSOCIATED TO A WIND
SURGE MOVING ACROSS THE LOCAL FORECAST AREA. THIS FEATURE WILL
INCREASE THE LOW LEVEL MOISTURE ACROSS THE LOCAL FORECAST AREA.
THEREFORE EXPECT SHOWERS TO AFFECT THE EASTERN PORTIONS OF PUERTO
RICO THROUGH MID MORNING AND AFTERNOON CONVECTION ACROSS THE
WESTERN AND SOUTHWEST PORTIONS OF PUERTO RICO.

THE NEXT TROPICAL WAVE IS FORECAST TO ENTER THE EASTERN CARIBBEAN
BY FRIDAY...AND AFFECT THE LOCAL ISLANDS OVER THE UPCOMING WEEKEND.

&&

.AVIATION...MVFR CONDITIONS WILL PREVAIL ACROSS TIST AT LEAST
THROUGH 13/12Z. ELSEWHERE...VFR CONDITIONS ARE EXPECTED TO PREVAIL
AT LEAST THROUGH 13/16Z. AFTER 16Z MVFR TO OCCASIONAL IFR EXPECTED
NEAR TJMZ AND TJBQ IN SCATTERED SHOWERS AND FEW TSRA WITH HIGHER
TERRAINS OBSCURED.

&&

.MARINE...ROUGH AND CHOPPY CONDITIONS WILL PREVAIL ACROSS MOST
EXPOSED MARINE ZONES AS MODERATE TO FRESH WIND FLOW WILL DOMINATE
REGIONAL WATERS. SMALL CRAFT ADVISORIES FOR SOME AREAS WILL LAST
MOST OF THE WEEK.

[Gustywind]

[cycloneye]

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
421 PM AST TUE JUL 13 2010

.SYNOPSIS...TUTT AXIS AND ASSOCIATED LOWER LEVEL REFLECTION WILL
CONTINUE MOVING WEST TONIGHT THROUGH EARLY WEDNESDAY...AS UPPER
LEVEL HIGH PRESSURE BUILDS INTO THE NORTHEAST CARIBBEAN LATER
WEDNESDAY THROUGH AT LEAST THURSDAY AND FRIDAY. A TROPICAL WAVE IS
EXPECTED TO MOVE ACROSS THE LOCAL AREA FRIDAY THROUGH SATURDAY.

&&

.DISCUSSION...AFTER A BRIEF DRY BREAK LATE THIS AFTERNOON AND
EARLY THIS EVENING...MOISTURE ASSOCIATED WITH THE LOWER LEVEL
REFLECTION OF AN INVERTED TUTT AND WIND SURGE WILL CONTINUE TO
MOVE INTO/ACROSS THE LOCAL AREA. THIS MOISTURE WILL INTERACT WITH
LOCAL EFFECTS AND FAVORABLE UPPER LEVEL CONDITIONS TO PRODUCE SOME
CLOUDINESS...SHOWERS AND A FEW THUNDERSTORMS ACROSS THE LOCAL
ISLANDS TONIGHT AND WEDNESDAY. ENOUGH MOISTURE WILL LINGER ACROSS
THE LOCAL AREA FOR THURSDAY TO RESULT IN ADDITIONAL CLOUDINESS...
SHOWERS AND ISOLATED THUNDERSTORMS. LOOKING AHEAD...A TROPICAL
WAVE AND AN ASSOCIATED SURGE OR TWO OF MOISTURE ARE EXPECTED TO
MOVE ACROSS THE LOCAL AREA FRIDAY THROUGH SATURDAY...BRINGING A
SIGNIFICANT INCREASE IN CLOUDINESS...SHOWERS AND THUNDERSTORMS TO
THE LOCAL ISLANDS. AT THIS MOMENT...THE MOST ACTIVE WEATHER
APPEARS TO BE FRIDAY AFTERNOON THROUGH EARLY FRIDAY NIGHT AND THEN
AGAIN SATURDAY AFTERNOON THROUGH AT LEAST EARLY SUNDAY...BUT THIS
TIMING COULD CHANGE.

&&

.AVIATION...EXPECT PREVAILING VFR CONDITIONS ACROSS THE LOCAL
ISLANDS AND AT ALL LOCAL TAF SITES THROUGH TONIGHT. HOWEVER...
BRIEF MVFR CONDITIONS AND LOCAL MOUNTAIN OBSCURATIONS ARE
EXPECTED IN SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS.

&&

.MARINE...GENERALLY EXPECT WINDS OF 15 TO 21 KNOTS AND SEAS OF 4
TO 9 FEET ACROSS THE REGIONAL WATERS THROUGH AT LEAST THURSDAY.
A SMALL CRAFT ADVISORY REMAINS IN EFFECT FOR MOST OF THE LOCAL
COASTAL WATERS TONIGHT.

[Macrocane]

The SNET said that the highest tides of the month will be registered on July 13, 14, 15 and 16 so if you want to see them you can do it on the La Libertad webcam in the first page of the thread, today highest will be at 05:48 pm (11:48 UTC).

Yesterday (July 12) precipitation and temperatures.

Rainfall

Santa Ana 57 mm/2.24 inches
San Salvador 17 mm/0.70 inches
Las Pilas 50 mm/1.97 inches
San Miguel 13 mm/0.51 inches
La Union 58 mm/2.28 inches


Temperatures

Code: Select all

Acajutla         min:22.0°C/71.6°F      max:29.4°C/84.9°F
Santa Ana        min:19.7°C/67.5°F      max:28.8°C/83.8°F
San Salvador     min:19.9°C/67.8°F      max:28.7°C/83.7°F
Las Pilas        min:14.0°C/57.2°F      max:21.4°C/70.5°F
San Miguel       min:22.6°C/72.7°F      max:32.9°C/91.2°F


[cycloneye]

FLOOD ADVISORY
NATIONAL WEATHER SERVICE SAN JUAN PR
900 PM AST TUE JUL 13 2010

PRC069-085-095-109-129-151-140345-
/O.NEW.TJSJ.FA.Y.0265.100714T0100Z-100714T0345Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN LORENZO PR-LAS PIEDRAS PR-PATILLAS PR-MAUNABO PR-HUMACAO PR-
YABUCOA PR-
900 PM AST TUE JUL 13 2010

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED AN

* URBAN AND SMALL STREAM FLOOD ADVISORY FOR MINOR FLOODING OF POOR
DRAINAGE AREAS IN THE FOLLOWING MUNICIPALITIES OF PUERTO RICO...

SAN LORENZO...LAS PIEDRAS...PATILLAS...MAUNABO...HUMACAO
AND YABUCOA

* UNTIL 1145 PM AST

* AT 851 PM AST DOPPLER RADAR ESTIMATED AN AREA OF HEAVY RAIN JUST
OFF THE EAST COAST OF PUERTO RICO MOVING WEST.

AN AREA OF SHOWERS AND A FEW THUNDERSTORMS WAS APPROACHING THE EAST
AND SOUTHEAST MUNICIPALITIES OF PUERTO RICO. PERIODS OF MODERATE TO
HEAVY RAINFALL MAY CAUSE RAINFALL ACCUMULATIONS OF UP TO ONE INCH
AND A HALF PER HOUR ACROSS THE ADVISORY AREA.

EXCESSIVE RUNOFF WILL CAUSE FLOODING OF SMALL CREEKS AND LOW SPOTS
IN HIGHWAYS. ADDITIONALLY...ROADS AND LAND ALONG THE BANKS OF CREEKS
AND STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING.
MOTORISTS SHOULD EXERCISE CAUTION.

[cycloneye]

AREA FORECAST DISCUSSION...CORRECTED
NATIONAL WEATHER SERVICE SAN JUAN PR
1049 PM AST TUE JUL 13 2010

.UPDATE...THE PROXIMITY OF THE UPPER LOW AND ASSOCIATED TROUGH/TUTT
WHICH CONTINUED TO SHIFT WESTWARD ACROSS THE REGION...IN COMBINATION
WITH LOW LEVEL SPEED CONVERGENCE CREATED BY THE STRONG HIGH PRESSURE
RIDGE ANCHORED ACROSS THE NORTH CENTRAL ATLANTIC AND A LOW LEVEL
INDUCED TROUGH NOW MOVING WEST ACROSS THE REGION... CONTINUED TO
PRODUCE AND ENHANCE SHOWER AND THUNDERSTORM ACTIVITY ACROSS THE
REGIONAL WATERS...AND MUCH OF THE EASTERN HALF OF PUERTO RICO AS
WELL AS CULEBRA...VIEQUES AND THE VIRGIN ISLANDS THROUGH THE LATE
EVENING HOURS. ALTHOUGH THIS ACTIVITY IS FAST MOVING...EXPECT
SUFFICIENT TRAILING MOISTURE ASSOCIATED WITH THIS FEATURE TO
CONTINUE TO MOVE ACROSS THE LOCAL AREA OVERNIGHT THROUGH WEDNESDAY
MORNING RESULTING IN INTERMITTENT PERIODS OF SHOWERS AND ISOLATED
THUNDERSTORMS ACROSS THE REGIONAL WATERS...AND MUCH OF THE EAST
AND SOUTHEAST SECTIONS OF PUERTO RICO...AS WELL AS PARTS OF THE
ADJACENT ISLANDS INCLUDING THE U.S. VIRGIN ISLANDS. THEREFORE...
MADE ADJUSTMENT TO THE SHORT TERM FORECAST TO REFLECT PRESENT AND
EXPECTED CONDITIONS. REMAINDER OF THE LONG TERM FORECAST PACKAGE
WAS UNCHANGED FOR NOW...AND STILL EXPECT THE NEXT TROPICAL WAVE TO
MOVE ACROSS THE REGION BY THE END OF THE WEEK AND INTO THE UPCOMING
WEEKEND.

&&

.AVIATION UPDATE...VFR TO MVFR CONDITIONS WILL PREVAIL ACROSS MOST OF
TAF SITES AT LEAST THROUGH 14/12Z IN SCATTERED TO NUMEROUS SHOWERS
AND A FEW THUNDERSTORMS. OCCASIONAL IFR EXPECTED NEAR HEAVIER
SHOWERS AND THUNDERSTORMS. STRONG AND GUSTY LOW LEVEL WINDS 25-30
KTS OR MORE EXPECTED ACROSS COASTAL WATERS AND INLAND FROM SFC-
100K FT. HIGHER TERRAIN AND MTN TOPS TEMPO OBSCURED DUE TO PASSING
SHRA/TSRA.

[cycloneye]

Good morning. Scattered showers and windy is the rule for today.

000
FXCA62 TJSJ 140849
AFDSJU

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
449 AM AST WED JUL 14 2010

.SYNOPSIS...STRONG SURFACE HIGH PRESSURE WILL REMAIN ANCHORED
ACROSS THE NORTH CENTRAL ATLANTIC...AND EXTEND SOUTHWEST INTO THE
NORTHEAST CARIBBEAN THROUGH AT LEAST THURSDAY.

&&

.DISCUSSION...SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS
CONTINUED TO AFFECT THE NORTHERN PORTIONS OF PUERTO RICO THROUGH
THE OVERNIGHT HOURS. ALTHOUGH MOST OF THESE SHOWERS WERE MOVING
FAST ACROSS THE AREA...THESE SHOWERS GENERATED BETWEEN 1 TO 2
INCHES ALONG THESE AREA. SECTIONS OF CARR #2 WERE CLOSE DUE TO
PONDING OF WATER ALONG THE ROAD.

THESES SHOWERS AND THUNDERSTORMS ARE THE PRODUCT OF THE
INTERACTION OF A UPPER LOW AND A LOW LEVEL SPEED CONVERGENCE
CREATED BY THE STRONG HIGH PRESSURE RIDGE ANCHORED ACROSS THE
NORTH CENTRAL ATLANTIC AND A LOW LEVEL INDUCED TROUGH NOW MOVING
WEST ACROSS THE REGION. A DRIER AIR MASS WILL MOVE OVER THE LOCAL
FORECAST AREA FROM THE EAST...THESE COULD CLEAR UP ENOUGH THE
SKIES FOR AFTERNOON CONVECTION TO OCCUR ACROSS THE INTERIOR AND
WESTERN PORTIONS OF PUERTO RICO.


THE NEXT TROPICAL WAVE TO MOVE ACROSS THE REGION BY THE END OF
THE WEEK AND INTO THE UPCOMING WEEKEND.

&&

.AVIATION...VFR TO MVFR CONDITIONS WILL PREVAIL ACROSS MOST OF TAF
SITES AT LEAST THROUGH 14/12Z IN SCATTERED PASSING SHOWERS AND A FEW
THUNDERSTORMS. STRONG AND GUSTY LOW LEVEL WINDS EXPECTED ACROSS
COASTAL WATERS AND INLAND FROM SURFACE TO 10K FT. HIGHER TERRAIN
OBSCURED.


&&

.MARINE...MODERATE TO FRESH WINDS WILL PREVAIL ACROSS THE LOCAL
WATERS TODAY. AS A RESULT...ROUGH AND HAZARDOUS SEAS WILL
CONTINUE ACROSS MOST OF THE WATERS FOR THE NEXT SEVERAL DAYS.

[artist]

just saying hi to all our friends that live in the islands. Now that we have this thread we don't get to see you guys as much! Hope all are well with everyone.