Showers and thunderstorms developed across the Cordillera Central, moving north northeast, under a south to south southwest wind flow. Deep tropical moisture affected the local region.
Every event with a place to put it. Tap one for its entry below.
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.
Showers and thunderstorms developed across the Cordillera Central, moving north northeast, under a south to south southwest wind flow. Deep tropical moisture affected the local region.
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 May 29, 2:57 PM AST, 1 hour 34 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN JUAN PR 257 PM AST FRI MAY 29 2015 .DISCUSSION...HEAVY SHOWERS AND STRONG THUNDERSTORMS DEVELOPED OVER THE NORTH CENTRAL SECTIONS OF PUERTO RICO INCLUDING THE SAN JUAN METROPOLITAN AREA. RADAR ESTIMATES WERE BETWEEN 2 TO 3 INCHES MAINLY OVER THE MUNICIPALITIES OF BAYAMON AND VEGA BAJA. AT THIS MOMENT MOST OF THESE SHOWERS AND THUNDERSTORMS HAVE SOME INTENSITY. THESE SHOWERS ARE EXPECTED TO CONTINUE THROUGH THE EVENING HOURS. RADAR AND SATELLITE IMAGES ARE SHOWING A LARGE AREA OF SHOWERS AND THUNDERSTORMS OVER THE LOCAL CARIBBEAN WATERS. THESE SHOWERS AND THUNDERSTORMS WILL MOVE SLOWLY NW AND AFFECT THE EASTERN AND SOUTHERN PORTIONS OF PUERTO RICO FROM LATE TONIGHT THROUGH SATURDAY MID MORNING. ON SATURDAY EXPECT A COMBINATION OF DAYTIME HEATING AND DIVERGENCE ALOFT TO ENHANCE CONVECTION ACROSS PARTS OF THE ISLANDS. THIS WILL INCREASE THE POTENTIAL FOR STRONG THUNDERSTORMS AND EVENTUALLY LEAD TO URBAN AND SMALL STREAM FLOODING IN SOME AREAS...ESPECIALLY ACROSS PARTS OF THE NORTHERN HALF OF PUERTO RICO. THE UPPER LEVEL TROUGH AND ASSOCIATED LOW WILL CONTINUE TO SHIFT WEST SOUTHWEST TO JUST NORTH OF HAITI THROUGH TONIGHT. THIS WEATHER PATTERN WILL MAINTAIN THE SUBTROPICAL JET STREAM ACROSS THE THE REGION WHICH HELP TO LIFT DEEP TROPICAL MOISTURE ACROSS THE AREA THROUGH EARLY SUNDAY. && .AVIATION...MVFR CONDITIONS WILL CONTINUE TO PREVAIL ACROSS TJSJ THROUGH AT LEAST 29/23Z. MAINLY VFR CONDITIONS ARE EXPECTED TO PREVAIL ACROSS ALL TAF SITES THROUGH 30/12Z. HOWEVER...PASSING SHOWERS WILL AFFECT THE LOCAL TAF SITES FROM TIME TO TIME. LOW LEVEL WINDS WILL BE MAINLY SOUTHEAST AT 10 KTS. && .MARINE...WINDS AND SEAS WILL CONTINUE AT 4 FEET OR LESS AND 10 KNOTS OR LESS RESPECTIVELY TONIGHT. DETERIORATING CONDITIONS EXPECTED TONIGHT AND SATURDAY DUE TO INCREASED POTENTIAL FOR THUNDERSTORM DEVELOPMENT AND INCLEMENT WEATHER ACROSS PORTIONS OF THE REGIONAL WATERS. && .PRELIMINARY POINT TEMPS/POPS... SJU 87 78 87 75 / 60 40 80 50 STT 84 77 86 76 / 50 50 70 60 && .SJU WATCHES/WARNINGS/ADVISORIES... PR...NONE. VI...NONE. AM...NONE. && 71/10
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN JUAN PR 605 AM AST FRI MAY 29 2015 AMZ710>745-PRZ001>013-301015- SAN JUAN AND VICINITY-NORTHEAST-SOUTHEAST-EASTERN INTERIOR- NORTH CENTRAL-CENTRAL INTERIOR-PONCE AND VICINITY-NORTHWEST- WESTERN INTERIOR-MAYAGUEZ AND VICINITY-SOUTHWEST-CULEBRA-VIEQUES- THE NEARSHORE AND OFF SHORE ATLANTIC AND CARIBBEAN COASTAL WATERS- 605 AM AST FRI MAY 29 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PUERTO RICO AND THE ADJACENT ATLANTIC COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT DIURNAL EFFECTS AND UNSTABLE ATMOSPHERIC CONDITIONS WILL ENHANCE THE POTENTIAL FOR STRONG THUNDERSTORMS AND HEAVY RAINFALL. THIS WILL LEAD TO URBAN AND SMALL STREAM FLOODING DURING THE AFTERNOON HOURS...ACROSS PARTS OF THE NORTH CENTRAL AND WESTERN INTERIOR OF PUERTO RICO...AND ACROSS PARTS OF THE SAN JUAN METRO AREA. ALSO...BRIEF GUSTY WINDS ARE EXPECTED NEAR THUNDERSTORM ACTIVITY. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY INCREASING TROPICAL MOISTURE WILL CAUSE MORE WIDESPREAD THUNDERSTORMS WITH DANGEROUS LIGHTNING INTO THE WEEKEND. MODERATE TO LOCALLY HEAVY RAIN IS POSSIBLE...WHICH COULD CAUSE FLOODING IN URBAN AREAS AND SMALL STREAMS AS WELL AS RAPID RIVER RISES. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. AMZ715-725-VIZ001-002-301015- ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX- NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS- 605 AM AST FRI MAY 29 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE U.S. VIRGIN ISLANDS AND THE ADJACENT COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT INCREASING TROPICAL MOISTURE WILL CAUSE MORE WIDESPREAD THUNDERSTORMS WITH DANGEROUS LIGHTNING LATER TODAY AND INTO THE WEEKEND. MODERATE TO LOCALLY HEAVY RAIN IS POSSIBLE...WHICH COULD CAUSE FLOODING IN URBAN AREAS...SMALL STREAMS AND GUTS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY AT LEAST THROUGH SUNDAY...THE POTENTIAL FOR MODERATE TO LOCALLY HEAVY RAINFALL ACROSS THE USVI REMAINS HIGH. THEREFORE...FLOODING IN URBAN AREAS...SMALL STREAMS AND GUTS WILL CONTINUE TO POSE A THREAT TO RESIDENTS ACROSS THE LOCAL ISLANDS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
203 PM AST FRI MAY 29 2015
PRZ005-291845-
NORTH CENTRAL-
203 PM AST FRI MAY 29 2015
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT TOA ALTA...VEGA BAJA...
DORADO...TOA BAJA...BARCELONETA...FLORIDA...MANATI...COROZAL...VEGA
ALTA AND MOROVIS MUNICIPALITIES...
AT 202 PM AST...A LINE OF STRONG THUNDERSTORMS WAS ALONG A LINE
EXTENDING FROM PAJONAL TO COROZAL...AND MOVING NORTH AT 10 MPH.
WINDS IN EXCESS OF 30 MPH ARE POSSIBLE WITH THESE STORMS.
LOCATIONS IMPACTED INCLUDE...
VEGA ALTA...MANATI...FLORIDA...BARCELONETA...VEGA BAJA...DORADO...TOA
BAJA...IMBERY...MIRANDA...LA LUISA...MONSERRATE...RIO LAJAS...COTO
NORTE...PAJONAL...BRENAS...SAN ANTONIO...BUFALO...SABANA...TIERRAS
NUEVAS PONIENTE AND TIERRAS NUEVAS PON.
TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY
CAUSE LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.
FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THESE STORMS.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.
LAT...LON 1847 6625 1843 6626 1839 6626 1838 6631
1837 6632 1836 6635 1838 6636 1837 6638
1837 6641 1838 6642 1837 6650 1835 6654
1835 6658 1848 6657 1849 6656 1847 6647
1849 6641
TIME...MOT...LOC 1802Z 198DEG 8KT 1839 6654 1837 6632
GARCIACOMUNICADO ESPECIAL SOBRE LAS CONDICIONES DEL TIEMPO
SERVICIO NACIONAL DE METEOROLOGIA SAN JUAN PR
203 PM AST VIERNES 29 DE MAYO DE 2015
PRZ001-005-006-281930-
INTERIOR CENTRAL-NORTE CENTRAL-SAN JUAN Y VECINDAD-
203 PM AST VIERNES 29 DE MAYO DE 2015
...UNA LINEA DE TRONADAS FUERTE AFECTARA LOS MUNICIPIOS DE TOA
ALTA...VEGA BAJA... DORADO...TOA
BAJA...BARCELONETA...FLORIDA...MANATI...COROZAL...VEGA ALTA Y
MOROVIS...
A LAS 2:02 PM AST...UNA LINEA DE TRONADAS FUERTES SE EXTENDIA DESDE
PAJONAL HASTA COROZAL...MOVIENDOSE HACIA EL NORTE A 10 MPH.
VIENTOS EN EXCESO DE 30 MPH SON POSIBLES CON ESTAS TORMENTAS.
LAS AREAS IMPACTADAS INCLUYE...
VEGA ALTA...MANATI...FLORIDA...BARCELONETA...VEGA BAJA...DORADO...TOA
BAJA...IMBERY...MIRANDA...LA LUISA...MONSERRATE...RIO LAJAS...COTO
NORTE...PAJONAL...BRENAS...SAN ANTONIO...BUFALO...SABANA...TIERRAS
NUEVAS PONIENTE Y TIERRAS NUEVAS PON.
LLUVIA TORRENCIAL TAMBIEN CONTINUA CON ESTA TORMENTA...Y PUDIERA
CAUSAR INUNDACIONES LOCALIZADAS. NO MANEJE EN CARRETERAS INUNDADAS.
BUSQUE REFUGIO SEGURO DENTRO DE UN EDIFICIO O VEHICULO.
RAYOS FRECUENTES DE NUBE A SUELO ESTAN OCURRIENDO CON ESTAS
TORMENTAS...Y PODRIAN CAER A 15 MILLAS DE UNA TRONADA. BUSQUE
REFUGIO SEGURO ADENTRO DE UN EDIFICIO O VEHICULO.
LAT...LON 1847 6625 1843 6626 1839 6626 1838 6631
1837 6632 1836 6635 1838 6636 1837 6638
1837 6641 1838 6642 1837 6650 1835 6654
1835 6658 1848 6657 1849 6656 1847 6647
1849 6641
TIME...MOT...LOC 1802Z 198DEG 8KT 1839 6654 1837 6632
GARCIA/ACPSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN JUAN PR 256 PM AST FRI MAY 29 2015 PRZ001-291945- SAN JUAN AND VICINITY- 256 PM AST FRI MAY 29 2015 ...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT GUAYNABO AND BAYAMON MUNICIPALITIES... AT 255 PM AST...A STRONG THUNDERSTORM WAS OVER BAYAMON...MOVING SLOWLY NORTHWARD. WINDS IN EXCESS OF 30 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THIS STORM. TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY CAUSE LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS. FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE SHELTER INSIDE A BUILDING OR VEHICLE. LAT...LON 1828 6613 1829 6619 1839 6619 1838 6613 TIME...MOT...LOC 1855Z 000DEG 0KT 1831 6616 FC
COMUNICADO ESPECIAL SOBRE LAS CONDICIONES DEL TIEMPO SERVICIO NACIONAL DE METEOROLOGIA SAN JUAN PR 256 PM AST VIERNES 29 DE MAYO DE 2015 PRZ001-291945- SAN JUAN Y VECINDAD- 256 PM AST VIERNES 29 DE MAYO DE 2015 ...UNA AREA DE TRONADAS FUERTES AFECTARA LOS MUNICIPIOS DE GUAYNABO Y BAYAMON... A LAS 2:55 PM AST...UNA TRONADA FUERTE ESTABA SOBRE BAYAMON...MOVIENDOSE LENTAMENTE HACIA EL NORTE. VIENTOS EN EXCESO DE 30 MPH Y GRANIZO PEQUENO SON POSIBLES CON ESTAS TORMENTAS. ADEMAS...LLUVIAS TORRENCIALES ESTAN OCCURIENDO Y PODRIAN CAUSAR INUNDACIONES LOCALIZADAS. NO MANEJE SU VEHICULO SOBRE CARRETERAS INUNDADAS. RAYOS FRECUENTES DE NUBE A SUELO ESTAN OCURRIENDO CON ESTAS TORMENTAS...Y PODRIAN CAER A 15 MILLAS DE UNA TRONADA. BUSQUE REFUGIO SEGURO ADENTRO DE UN EDIFICIO O VEHICULO. LAT...LON 1828 6613 1829 6619 1839 6619 1838 6613 TIEMPO...MOT...LOC 1855Z 000DEG 0KT 1831 6616 FC/ACP
The national radar mosaic for the moment the first event began.
1 flood, 1 heavy rain. Local standard time, as filed.
Rio Fajardo out of its banks. PR-3 with PR-53 at Cilito ward, impassable.
A mudslide was reported in the intersection between roads PR-167 and PR-812 in Bayamon.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Puerto Rico in 2015Every state in 2015This day in weather historyWarnings in Puerto Rico, May 2015
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: 574320, 574321.