An upper level trough, in combination with daytime heating and sea breeze convergence, produced scattered showers with thunderstorms over the municipality of Guaynabo producing urban flooding.
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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.
An upper level trough, in combination with daytime heating and sea breeze convergence, produced scattered showers with thunderstorms over the municipality of Guaynabo producing urban flooding.
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 Jun 12, 11:57 AM AST, 2 hours 53 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN JUAN PR 1157 AM AST WED JUN 12 2013 .UPDATE...RADAR AND SATELLITE IMAGERY SHOWED SHOWERS AND ISOLATED THUNDERSTORMS AFFECTING THE NORTHEAST AND EASTERN PORTIONS OF PUERTO RICO THIS MORNING. ATTM...SHOWERS AND THUNDERSTORMS HAVE BEGUN TO DEVELOP ACROSS MOST OF PUERTO RICO EXCLUDING THE SOUTH COAST OF PUERTO RICO. MORNING TJSJ SOUNDING INDICATED MOISTURE 20-40 PERCENT ABOVE NORMAL...UNDER AN UNSTABLE ATMOSPHERE. THIS CONDITIONS ARE FAVORABLE TO SUPPORT MODERATE TO STRONG CONVECTION ACROSS PORTIONS OF THE CORDILLERA CENTRAL AND THE WEST AND NORTHWEST PUERTO RICO THE REST OF THE MORNING AND AFTERNOON. AS A RESULT... EXPECT AN ACTIVE AFTERNOON WITH SHOWERS AND THUNDERSTORMS WITH HEAVY RAINFALL AFFECTING MOST OF MAINLAND PUERTO RICO THROUGH AT LEAST THIS EVENING. THIS COULD RESULT IN URBAN AND SMALL STREAM FLOODING ACROSS PORTIONS OF PUERTO RICO AS WELL AS FLASH FLOODING IN ISOLATED AREAS WHERE SEVERAL ROUNDS OF HEAVY RAINFALL OCCUR. MINOR CHANGES WERE INTRODUCED TO THE FORECAST PACKAGE THIS MORNING AS IT REMAINS IN LINE WITH LATEST THINKING. && .AVIATION...MVFR/IFR CONDS WILL CONTINUE NEAR TJSJ THRU 1630Z...IMPROVING AFT 1630Z WITH VFR CONDS EXPECTED. MVFR CONDS PSBL IN AND AROUND TJMZ AND TJBQ BTWN 12/17-21Z. WINDS WILL PREVAIL FROM THE E TO ESE AT 15-20 KT WITH HIGH GUSTS NEAR SHRA/TSRA. && .MARINE...NO CHANGES TO THE PREVIOUS MARINE DISCUSSION. && .PREV DISCUSSION... /ISSUED 558 AM AST WED JUN 12 2013/ SYNOPSIS...A TUTT WILL DEVELOP ACROSS THE CENTRAL ATLANTIC INTO THE NORTHEASTERN CARIBBEAN EARLY NEXT WORK WEEK. SURFACE HIGH ACROSS THE CENTRAL ATLANTIC WILL CONTINUE TO PROMOTE FRESH TO MODERATE TRADES FOR THE NEXT FEW DAYS. NEXT TROPICAL WAVE IS EXPECTED TO MOVE OVER THE LOCAL ISLANDS ON FRIDAY. DISCUSSION...INCREASING SHOWER COVERAGE HAVE OCCURRED IN THE PAST FEW HOURS OVER THE EASTERN PORTIONS OF PUERTO RICO. THESE SHOWERS ARE EXPECTED TO LAST THROUGH AT LEAST MID MORNING MAINLY AFFECTING THE EASTERN PORTIONS OF PUERTO RICO INCLUDING THE SAN JUAN METROPOLITAN AREA. AT THE BEGINNING OF THE WEEK A DRIER AIR MASS WAS FORECAST TO PREVAILED OVER THE REGION FROM WEDNESDAY AND THURSDAY. THE MODELS HAVE BACK OFF THE DRY SLOT FOR THESE TWO DAYS. THE NEW MODELS RUNS ARE STILL SUGGESTING FOR THIS DRIER AIR MASS TO MOVE OVER THE AREA ON THURSDAY BUT IT WILL NOT BE AS DRY AS EXPECTED...THEREFORE EXPECT MORNING SHOWERS AFFECTING THE EASTERN PORTIONS OF PUERTO RICO AND AFTERNOON SHOWERS AND THUNDERSTORMS ALONG THE CORDILLERA CENTRAL AND WESTERN PORTION OF PUERTO RICO. A TROPICAL WAVE WILL MOVE ACROSS THE REGION ON FRIDAY...SHOWER COVERAGE AND THUNDERSTORM INTENSITY WILL INCREASE ACROSS THE LOCAL ISLANDS. WEATHER CONDITIONS ARE EXPECTED TO IMPROVE SUNDAY THROUGH TUESDAY AS A DRIER AND STABLE AIR MASS PREVAILS OVER THE AREA. THEREAFTER... MOISTURE IS EXPECTED TO POOL ONCE AGAIN ACROSS THE EASTERN CARIBBEAN BY MIDWEEK NEXT WEEK AS TUTT DEVELOPS ACROSS THE CENTRAL ATLANTIC INTO THE EASTERN CARIBBEAN. AVIATION...MID TO HIGH CLOUDS WILL CONTINUE TO AFFECT MOST OF THE LOCAL FLYING AREA THIS MORNING. SOME PASSING SHOWERS EXPECTED TO AFFECT TIST...TISX AND TJSJ FROM TIME TO TIME UNTIL AT LEAST 12/15Z. VICINITY SHOWERS AND AN ISOLATED THUNDERSTORM OR TWO NEAR TJMZ AND TJBQ BETWEEN 12/18Z AND 12/22Z. LATEST 12/00Z TJSJ SOUNDING INDICATED MAINLY EASTERLY WINDS BETWEEN 10 TO 15 KTS FROM THE SURFACE UP TO 10K FEET. MARINE...CHOPPY MARINE CONDITIONS WILL PREVAIL ACROSS THE LOCAL WATERS THROUGH THE INCOMING WEEKEND...FOR THIS REASON MARINERS SHOULD EXERCISE CAUTION. && .PRELIMINARY POINT TEMPS/POPS... SJU 88 78 88 78 / 50 20 30 30 STT 89 79 89 79 / 40 30 20 30 && .SJU WATCHES/WARNINGS/ADVISORIES... PR...NONE. VI...NONE. COASTAL WATERS...NONE. && 11/23
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN JUAN PR 1145 AM AST WED JUN 12 2013 AMZ710>745-PRZ001>013-131545- 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- 1145 AM AST WED JUN 12 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PUERTO RICO AND THE ADJACENT ATLANTIC COASTAL WATERS. .DAY ONE...THIS AFTERNOON AND TONIGHT LOW LEVEL MOISTURE WILL CONTINUE TO COMBINE WITH LOCAL EFFECTS AND DIURNAL HEATING TO INDUCE SHOWER AND THUNDERSTORM DEVELOPMENT ACROSS PORTIONS OF MAINLAND PUERTO RICO THIS AFTERNOON. LOCALIZED FLOODING...GUSTY WINDS AND LIGHTNING WILL BE POSSIBLE WITH THESE SHOWERS AND THUNDERSTORMS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT...HEAVY RAIN...GUSTY WINDS OR FLOODING REPORTS WOULD BE APPRECIATED. AMZ715-725-VIZ001-002-131545- ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX- NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS- 1145 AM AST WED JUN 12 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE U.S. VIRGIN ISLANDS AND THE ADJACENT COASTAL WATERS. .DAY ONE...THIS AFTERNOON AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT...SPOTTER ACTIVATION WILL NOT BE NEEDED.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN JUAN PR 114 PM AST WED JUN 12 2013 PRC011-027-071-081-083-097-099-115-131-121815- ANASCO PR-LARES PR-MOCA PR-SAN SEBASTIAN PR-LAS MARIAS PR-ISABELA PR- CAMUY PR-MAYAGUEZ PR-QUEBRADILLAS PR- 114 PM AST WED JUN 12 2013 AT 107 PM AST...NATIONAL WEATHER SERVICE METEOROLOGIST DETECTED A STRONG THUNDERSTORM OVER THE BORDER BETWEEN SAN SEBASTIAN AND LAS MARIAS...MOVING NORTHWEST AT 10 MPH. THIS STRONG STORM IS CAPABLE OF PRODUCING TORRENTIAL RAINFALL...EXCESSIVE DANGEROUS CLOUD TO GROUND LIGHTNING AND STRONG GUSTY WINDS OF 25 TO 35 MPH. HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS AS THEY MAY BE WASHED OUT. WATER LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE...THEREFORE SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS. INTENSE LIGHTNING IS REPORTED WITH THIS STORM. IF OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES. ER
COMUNICADO ESPECIAL SOBRE LAS CONDICIONES DEL TIEMPO SERVICIO NACIONAL DE METEOROLOGIA SAN JUAN PR 114 PM AST MIERCOLES 12 DE JUNIO DE 2013 PRC011-027-071-081-083-097-099-115-131-121815- ANASCO PR-LARES PR-MOCA PR-SAN SEBASTIAN PR-LAS MARIAS PR-ISABELA PR- CAMUY PR-MAYAGUEZ PR-QUEBRADILLAS PR- 114 PM AST MIERCOLES 12 DE JUNIO DE 2013 A LAS 1:07 PM AST...METEOROLOGOS DEL SERVICIO NACIONAL DE METEOROLOGIA DETECTARON UNA TRONADA FUERTE SOBRE SAN SEBASTIAN Y LAS MARIAS...MOVIENDOSE HACIA EL NOROESTE A 10 MPH. ESTA TRONADA ES CAPAZ DE PRODUCIR LLUVIAS TORRENCIALES...RELAMPAGOS FRECUENTES DE NUBE A SUELO...Y VIENTOS EN RAFAGAS ENTRE 25 A 35 MPH. LAS LLUVIAS FUERTES PUDIERAN INUNDAR AREAS BAJAS TALES COMO BADENES Y AREAS BAJO LOS PUENTES. EVITE ESTAS AREAS Y NO INTENTE CRUZAR CARRETERAS INUNDADAS YA QUE PUDIERA SER ARRASTRADO POR LAS CORRIENTES DE AGUA. LOS NIVELES DE AGUA DE LOS RIACHUELOS Y RIOS PUDIERAN AUMENTAR...POR LO TANTO...MUEVASE A TERRENO MAS ALTO SI ES AMENAZADO POR LAS AGUAS CRECIDAS. SE REPORTAN RELAMPAGOS INTENSOS CON ESTAS TRONADAS. SI SE ENCUENTRA EN EL EXTERIOR...ALEJESE DE LOS OBJETOS ALTOS TALES COMO ARBOLES. MUEVASE A UN EDIFICIO SI ES POSIBLE. CUANDO SE ENCUENTRE EN EL INTERIOR...MANTENGASE LEJOS DE LAS VENTASAS Y PUERTAS Y EVITE UTILIZAR TELEFONOS A MENOS QUE SEA UNA EMERGENCIA. INTENTE DESCONECTAR ENSERES ELECTRICOS ANTES DE QUE SE ACERQUE LA TORMENTA. ER/DS
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
San Patricio shopphing center, Martinez Nadal Avenue, and Fort Buchanan were flooded in poor drainage areas.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Puerto Rico in 2013Every state in 2013This day in weather historyWarnings in Puerto Rico, June 2013
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: 458768.