Numerous showers developed over Puerto Rico during the afternoon hours. Heavy rains were detected across the north central and northwest part of the island.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS SJU wrote it up.
Numerous showers developed over Puerto Rico during the afternoon hours. Heavy rains were detected across the north central and northwest part of the island.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS San Juan, PR wrote its last area forecast discussion before the first event at Apr 30, 12:07 PM AST, 2 hours 13 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN JUAN PR 1207 PM AST MON APR 30 2007 .UPDATE...SCATTERED SHOWERS ARE CURRENTLY DEVELOPING OVER SECTIONS OF THE INTERIOR AND NORTHEASTERN PUERTO RICO. WITH AMPLE AVAILABLE LOW LEVEL MOISTURE...AND GOOD DIURNAL HEATING...EXPECT THIS SHOWER ACTIVITY TO CONTINUE TO DEVELOP AND SPREAD ACROSS MUCH OF NORTHERN PUERTO RICO THROUGH THE AFTERNOON HOURS. INHERITED FORECAST CONTAINED NUMEROUS SHOWERS AND ISOLATED THUNDERSTORMS OVER LARGE SECTIONS OF NORTHWESTERN PUERTO RICO...AND THIS FORECAST SEEMS TO BE ON TRACK WITH CURRENT DEVELOPMENT. WENT AHEAD AND SENT A QUICK UPDATE TO THE FORECAST...BUT NO SIGNIFICANT CHANGES NECESSARY AT THIS TIME. && .PREV DISCUSSION... /ISSUED 439 AM AST MON APR 30 2007/ SYNOPSIS...AT UPPER LEVELS...THE SOUTH FORK OF THE SUB TROPICAL JET MOVES EAST OVER THE BAHAMAS AND EXTENDS NORTH OF PUERTO RICO AND THE U.S. VIRGIN ISLANDS. RIDGING DEVELOPS OVER THE LOCAL AREA TUESDAY AND WEDNESDAY...BUT FLOW BEGINS TO TURN SOUTHWEST ON WEDNESDAY AND THURSDAY. FLOW RETURNS TO A SLIGHT ANTICYCLONIC CONFIGURATION ON FRIDAY. A POSITIVELY TILTED TROUGH SWEEPS OUT OF THE UNITED STATES ON FRIDAY NIGHT AND FORMS A STRONG LOW NORTH OF SAINT THOMAS NEAR 35 NORTH...PULLING STRONG WEST SOUTHWEST FLOW OVER THE AREA SUNDAY THROUGH TUESDAY IN THE FOLLOWING WEEK. AT MID LEVELS...HIGH PRESSURE REMAINS SOUTH WHILE LOW PRESSURE HOLDS WELL TO THE NORTH UNTIL MID WEEK. ON THURSDAY A RIDGE EXTENDS ACROSS THE U.S. VIRGIN ISLANDS AND ACROSS THE WESTERN ATLANTIC JUST NORTH OF THE BAHAMA ISLANDS. THIS RIDGE BECOMES MORE NORTH-SOUTH AND DRIFTS EAST TO THE THE LONGITUDE OF THE WINDWARD ISLANDS ON FRIDAY. DURING THE WEEKEND TROUGHING DIGS INTO THE WESTERN ATLANTIC AND HIGH PRESSURE REMAINS IN THE SOUTHERN CARIBBEAN. A VIGOROUS LOW NORTH OF THE U.S. VIRGIN ISLANDS BETWEEN 35 TO 40 NORTH DURING THE EARLY PART OF THE FOLLOWING WEEK CAUSES MID LEVEL FLOW TO BECOME WEST SOUTHWEST. AT LOWER LEVELS...HIGH PRESSURE OVER THE EAST CENTRAL ATLANTIC BUILDS SOMEWHAT OVER THE NEXT SEVERAL DAYS JUST EAST OF THE WINDWARD ISLANDS. THIS CREATES A MORE SOUTHEASTERLY FLOW OVER PUERTO RICO AND THE ENTIRE EASTERN CARIBBEAN. PATCHES OF GOOD MOISTURE TRAVEL THROUGH THIS FLOW BRINING SCATTERED SHOWERS. MOISTURE INCREASES AT LOWER LEVELS WEDNESDAY AND THEN FLOW CONVERGES INTO LOW PRESSURE EAST OF FLORIDA LATER IN THE WEEK... CREATING A STREAM OF HIGH RELATIVE HUMIDITY FLOW FROM PUERTO RICO NORTHWEST THAT PERSISTS INTO THE WEEKEND. THE LOW PRESSURE MOVES EAST NORTHEAST INTO THE WESTERN ATLANTIC TRAILING A COLD FRONT THAT APPROACHES THE AREA ON SUNDAY AND STALLS JUST NORTH THROUGH THE BEGINNING OF THE FOLLOWING WEEK. DISCUSSION...THE GFS HAS DONE ITS BEST TO FOLLOW THE MOIST PATCHES THAT HAVE BEEN MIGRATING ACROSS THE ATLANTIC AND INTO THE EASTERN CARIBBEAN AND OVER THE LOCAL ISLANDS. RADAR SHOWS THAT THE MODEL HAS DONE FAIRLY WELL AT TRACKING THE LATEST BAND STILL APPROACHING ACCORDING TO NWS DOPPLER RADAR. SHOWERS HAVE CROSSED SAINT CROIX...BRUSHED BY SAINT THOMAS AND ENTERED THE EAST COAST OF PUERTO RICO. WITH SHOWERS ALREADY MOVING TOWARD THE WEST NORTHWEST ENOUGH MOISTURE SHOULD STILL BE LINGERING OVER PUERTO RICO TO HAVE ANOTHER FAIRLY ACTIVE DAY OVER THE NORTHWEST QUADRANT OF THE ISLAND. ADD TO THIS THE LIKELIHOOD OF SEA BREEZES ALONG THE NORTH AND SOUTH COASTS AND GOOD HEATING OVER THE INTERIOR...THE CONVERGENCE OVER THE NORTHWEST QUADRANT SHOULD BE AT LEAST AS GOOD AS THE PREVIOUS TWO DAYS WHEN SHOWERS COVERED AT LEAST 80 PERCENT OF THE WESTERN INTERIOR ZONE AND AMOUNTS OF 2 TO 3 INCHES FELL IN SOME OF THE AREAS WITH THE MOST RAIN. TUESDAY DOES NOT HAVE AS MUCH MOISTURE IN THE MODELS...BUT WEDNESDAY MARKS THE BEGINNING OF INCREASING MOISTURE IN A STEADY SOUTHEAST FLOW AT 850 MB. MOISTURE THEN INCREASES OVER THE ISLAND AND TO THE NORTHWEST THROUGH THURSDAY. THE GFS BEGINS TO BRING IN PRECIPITABLE WATER VALUES OF 1.8 TO 2.0 INCHES AND THERE IS LITTLE CHANGE UNTIL HIGHER AMOUNTS APPEAR EARLY NEXT WEEK. SINCE THIS WET TREND HAS BEEN BEING HERALDED BY THE GFS FOR AT LEAST THREE DAYS NOW...WITH ONLY MINOR FLUCTUATIONS...HAVE BROUGHT THE GRIDS INTO FULL ALIGNMENT. AND...CONSIDERING THAT THE PAST FEW DAYS HAVE BROUGHT SIGNIFICANT RAIN AMOUNTS TO THE NORTHWEST...IN MODEST MOISTURE...AM CONCERNED WHAT WILL HAPPEN WHEN MOISTURE INCREASES...WITH ALREADY WET SOILS. THE GFS CONTINUES SOUTHEAST FLOW AT LOWER LEVELS FROM THE REST OF THIS WEEK AND INTO THE NEXT...AND...INTRODUCES SOME UNCERTAINTY AS TO WHETHER A BOUNDARY WILL BE STRONG ENOUGH TO INVADE THE AREA WITH NORTH OR NORTHEASTERLY SURFACE FLOW BY SUNDAY OR LATER. THIS BOUNDARY PASSAGE BEING INITIATED BY STRONG LOW PRESSURE THAT DEEPENS OVER THE WEST CENTRAL ATLANTIC DURING THE WEEKEND. UNFORTUNATELY MODELS SEEM TO INDICATE EVEN MORE WET WEATHER SUNDAY THROUGH TUESDAY AS THIS BOUNDARY SETS UP IN A SIMILAR MANNER TO THE ONE THAT RETREATED ONLY FOUR OR FIVE DAYS AGO. AVIATION...LOW LEVEL FLOW WILL BEGIN TO SWITCH TO THE EAST SOUTHEAST AND CLOUDINESS WILL INCREASE OVER THE AREA THROUGH THURSDAY. SIGNIFICANT OBSTRUCTIONS TO VISIBILITY AND UNSTABLE WEATHER IS EXPECTED TO BEGIN WEDNESDAY AND THURSDAY. ALSO SIGNIFICANT WEATHER EN ROUTE TO MIAMI IS EXPECTED AFTER TUESDAY. MARINE...WINDS WILL INCREASE TUESDAY AND WEDNESDAY AND LOCAL SEAS WILL FOLLOW. WINDS WILL LOCALLY REACH SMALL CRAFT CRITERIA IN A FEW AREAS TUESDAY AND WEDNESDAY...BUT SEAS ARE EXPECTED TO REMAIN BELOW 7 FEET THROUGHOUT THE PERIOD. HYDROLOGY...SHOWERS AND THUNDERSTORMS WILL PRODUCE LOCAL FLOODING OF SMALL STREAMS AND URBAN AREAS IN WESTERN PUERTO RICO THIS AFTERNOON AND POSSIBLY TUESDAY AFTERNOON AS WELL...DUE TO THE LOCAL LOW OVER THE WESTERN END OF THE ISLAND. ALSO WINDS AT 850 MB ARE EAST SOUTHEAST...AND TOGETHER WITH THE SEA BREEZE ON THE NORTH COAST...CONSIDERABLE CONVECTIVE ACTIVITY WILL FORM OVER THE AREA AGAIN. BEGINNING WEDNESDAY AND THURSDAY MOISTURE IS INDICATED IN THE MODELS FROM PUERTO RICO AND THE U.S. VIRGIN ISLANDS NORTHWEST IN CONVERGENT FLOW AROUND THE SOUTHWESTERN PERIPHERY OF THE HIGH PRESSURE. THIS CONSISTENT PATTERN WITH LITTLE INTERRUPTION OF DRIER AIR WILL MAKE LOCAL FLOODING OF URBAN AND SMALL STREAMS ALMOST INEVITABLE WITH OTHER RIVER FLOODING POSSIBLE OVER THE NORTHERN HALF OF PUERTO RICO AND MUCH OF ITS MOUNTAINOUS SPINE. RAIN AMOUNTS IN THE U.S. VIRGIN ISLANDS SHOULD BE CONSIDERABLY LESS...WITH LESS DANGER OF FLOODING...HOWEVER LOCAL PERSISTENT CELLS COULD YIELD SOME ISOLATED FLOODING THERE AS WELL. THERE IS SOME UNCERTAINTY IN THE RAIN AMOUNT EXPECTED OVER THE AREA...BUT FEEL THAT THERE IS SUFFICIENT RISK OF FLOODING AND MUDSLIDES TO ISSUE A HYDROLOGIC OUTLOOK FOR THIS WEEK. && .PRELIMINARY POINT TEMPS/POPS... SJU 85 75 85 75 / 40 30 30 50 STT 83 76 82 76 / 40 40 40 50 && .SJU WATCHES/WARNINGS/ADVISORIES... PR...NONE. VI...NONE. && 04/99
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN JUAN PR 600 AM AST MON APR 30 2007 PRZ001>013-AMZ710>750-011000- 600 AM AST MON APR 30 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PUERTO RICO. .TODAY AND TONIGHT...PATCHES OF MOISTURE CONTINUE TO PASS THROUGH IN THE TRADE WIND FLOW AT THE BASE OF THE HIGH PRESSURE OVER NORTHEAST CENTRAL ATLANTIC. THIS MOISTURE WILL BRING SHOWERS AND ONE OR TWO ISOLATED THUNDERSTORMS THIS AFTERNOON TO PARTS OF THE WEST AND INTERIOR SECTIONS OF PUERTO RICO. SOME OF THESE SHOWERS ARE EXPECTED TO PRODUCE LOCALLY HEAVY RAINFALL WHICH MAY LEAD TO URBAN AND SMALL STREAM FLOODING IN ISOLATED AREAS. .DAYS TWO THROUGH SEVEN...ALTHOUGH INTERVALS OF SHOWERS AND A FEW ISOLATED THUNDERSTORMS WILL OCCUR OVER THE AREA DURING THE NEXT FEW DAYS...MOISTURE SIGNIFICANTLY INCREASES DURING THE MIDDLE OF THE WEEK AND AS A RESULT INCREASES THE RISK OF LOCAL RIVERS...SMALL STREAM AND URBAN FLOODING FROM WEDNESDAY THROUGH FRIDAY. .SPOTTER CALL TO ACTION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED WEDNESDAY THROUGH THE END OF THE WEEK. VIZ001-002-AMZ710>730-011000- 600 AM AST MON APR 30 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE U.S. VIRGIN ISLANDS. .TODAY AND TONIGHT...NO HAZARDOUS WEATHER IS EXPECTED. .DAYS TWO THROUGH SEVEN...ALTHOUGH INTERVALS OF SHOWERS AND A FEW ISOLATED THUNDERSTORMS WILL OCCUR OVER THE AREA DURING THE NEXT FEW DAYS...MOISTURE SIGNIFICANTLY INCREASES DURING THE MIDDLE OF THE WEEK AND AS A RESULT INCREASES THE RISK OF LOCAL RIVERS...SMALL STREAM AND URBAN FLOODING FROM WEDNESDAY THROUGH FRIDAY. .SPOTTER CALL TO ACTION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED WEDNESDAY THROUGH THE END OF THE WEEK. STAY TUNED TO NOAA WEATHER RADIO AND OTHER LOCAL MEDIA FOR FURTHER DETAILS OR UPDATES. FOR ADDITIONAL INFORMATION...VISIT THE NATIONAL WEATHER SERVICE WEB SITE FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS AT (ALL LOWERCASE LETTERS): HTTP://WWW.SRH.NOAA.GOV/SJU FROM YOUR PDA/PHONE: HTTP://MOBILE.SRH.NOAA.GOV OR WWW.SRH.NOAA.GOV/WML
The national radar mosaic for the moment the first event began.
4 heavy rain, 1 debris flow. Local standard time, as filed.
Doppler detected heavy rain over a large part of Florida municipality. Roads 642 and 140 were reported flooded, as well as sector La Vazquez and Cruce Pajonal. Flooded homes were reported at La Charca sector, Parcelas Llanes, Arroyo and La Ceiba communities.
A flooded road was reported at Barrio Bajura along road 485 in Camuy.
A flooded home was reported at Barrio Asomante along road 115 in Aguada.
Highway 2 was reported flooded in front of Banco Popular in Arecibo.
A landslide was reported at Barrio Mamey along road 4417 in Aguada.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Puerto Rico in 2007Every state in 2007This day in weather historyWarnings in Puerto Rico, April 2007
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 30666, 30670, 30671, 30661, 30662.