The combination of an old frontal boundary with an upper level trough produced numerous showers with thunderstorms over Puerto Rico during the period of May 8 to May 10, 2014. Heavy rainfall produced flash flooding over the San Juan Metropolitan area as well over the Eastern Section Of Puerto Rico.
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.
The combination of an old frontal boundary with an upper level trough produced numerous showers with thunderstorms over Puerto Rico during the period of May 8 to May 10, 2014. Heavy rainfall produced flash flooding over the San Juan Metropolitan area as well over the Eastern Section Of Puerto Rico.
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 8, 10:26 AM AST, 3 hours 34 minutes earlier.
AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE SAN JUAN PR 1026 AM AST THU MAY 8 2014 .SYNOPSIS...UPPER TROUGH WILL CONTINUE TO AMPLIFY WITH A CLOSED LOW EXPECTED TO FORM NORTH OF THE AREA TONIGHT. THE LOW WILL MEANDER THRU THE WEEKEND THEN FILL AND MOVE AWAY EARLY NEXT WEEK. && .DISCUSSION...ATMOSPHERE PRETTY MOIST AND UNSTABLE THIS MORNING AS SEEN ON 12Z JSJ RAOB. SHOWERS COULD FORM ABOUT ANYWHERE BUT APPEARS SOUTHEAST PR...CULEBRA...VIEQUES AND THE USVI WILL BE THE PREFERRED AREAS FOR CONVECTION. RADAR ANIMATION SHOWS SHOWERS MOVING WWD AS THEY ARE MOVING WITH THE LOW LEVEL FLOW BUT AS CONVECTION BECOMES DEEPER EXPECT STORMS TO MOVE MORE TO THE SOUTH SOUTHEAST LATER THIS AFTERNOON. DESPITE VERY COLD TEMPS ALOFT...HAIL FORMATION WILL BE SUPPRESSED DUE TO VERY MOIST MID AND UPPER LEVELS. && .AVIATION...VCTS BKN030CB AT ALL TAFS FOR NOW. WILL AMMEND TAFS AS SOON AS GET A BETTER PICTURE OF WHEN AND WHERE STORMS WILL HIT. && .MARINE...SEAS STILL 2-4 FT EXPECTED TO BUILD TO 3-5 FT FRI. FREQ LIGHTNING CAN BE EXPECTED. WINDS AND WAVES ALWAYS HIGHER NEAR THUNDERSTORMS. && .PRELIMINARY POINT TEMPS/POPS... SJU 84 77 84 74 / 60 70 70 60 STT 83 77 83 75 / 70 80 80 60 && .SJU WATCHES/WARNINGS/ADVISORIES... PR...NONE. VI...NONE. COASTAL WATERS...NONE. && 64/64
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN JUAN PR 611 AM AST THU MAY 8 2014 AMZ710>745-PRZ001>013-091015- 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- 611 AM AST THU MAY 8 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PUERTO RICO AND THE ADJACENT ATLANTIC COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT SHOWERS AND THUNDERSTORMS WILL ONCE AGAIN DEVELOP AFTER MID-MORNING AND WILL BE CAPABLE OF PRODUCING MODERATE TO LOCALLY HEAVY RAINFALL AND OCCASIONAL LIGHTNING ACROSS CULEBRA AND VIEQUES AND OVER PUERTO RICO TODAY. THE POSSIBILITY OF URBAN AND SMALL STREAM FLOODING IS HIGH NEAR THESE INTENSE SHOWERS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY AN UPPER LEVEL TROUGH OVER THE AREA WILL CONTINUE TO DEEPEN TODAY FORMING A CLOSED LOW NORTH OF OUR AREA BEGINNING TONIGHT. AS IT DOES SO...THE ATMOSPHERE WILL BECOME MORE HUMID AND UNSTABLE WITH SHOWERS AND THUNDERSTORMS BECOMING MORE NUMEROUS AND INTENSE ESPECIALLY ON FRIDAY. SMALL HAIL MAY BE POSSIBLE ON FRIDAY. MODERATE TO LOCALLY HEAVY RAINFALL...GUSTY WINDS AND FREQUENT LIGHTNING CAN BE EXPECTED WITH THE STRONGEST STORMS THROUGH MUCH OF THE UPCOMING 6 DAYS. THIS WET AND ACTIVE WEATHER PATTERN IS FORECAST TO CONTINUE THROUGH AT LEAST THE WEEKEND. .SPOTTER INFORMATION STATEMENT... REPORTS OF FLOODING WOULD BE GREATLY APPRECIATED. AMZ715-725-VIZ001-002-091015- ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX- NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS- 611 AM AST THU MAY 8 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE U.S. VIRGIN ISLANDS AND THE ADJACENT COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT SHOWERS AND THUNDERSTORMS WILL ONCE AGAIN DEVELOP AFTER MID-MORNING AND WILL BE CAPABLE OF PRODUCING MODERATE TO LOCALLY HEAVY RAINFALL AND OCCASIONAL LIGHTNING ACROSS THE ISLANDS AND ADJACENT WATERS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY AN UPPER LEVEL TROUGH OVER THE AREA WILL CONTINUE TO DEEPEN TODAY FORMING A CLOSED LOW NORTH OF OUR AREA BEGINNING TONIGHT. AS IT DOES SO...THE ATMOSPHERE WILL BECOME MORE HUMID AND UNSTABLE WITH SHOWERS AND THUNDERSTORMS BECOMING MORE NUMEROUS AND INTENSE ESPECIALLY ON FRIDAY. MODERATE TO LOCALLY HEAVY RAINFALL...GUSTY WINDS AND LIGHTNING CAN BE EXPECTED WITH THE STRONGEST STORMS. THIS WET AND ACTIVE WEATHER PATTERN IS FORECAST TO CONTINUE THROUGH AT LEAST THE WEEKEND. .SPOTTER INFORMATION STATEMENT... REPORTS OF FLOODING WOULD BE GREATLY APPRECIATED.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN JUAN PR 136 PM AST THU MAY 8 2014 PRC059-093-121-153-081815- GUAYANILLA PR-MARICAO PR-SABANA GRANDE PR-YAUCO PR- 136 PM AST THU MAY 8 2014 AT 131 PM AST...NATIONAL WEATHER SERVICE METEOROLOGIST DETECTED A STRONG THUNDERSTORM OVER YAUCO AND SABANA GRANDE...NEAR STATIONARY. THIS STRONG THUNDERSTORM WILL BE CAPABLE OF PRODUCING TORRENTIAL RAINFAL...DANGEROUS LIGHTNING AND SMALL HAIL. ADDITIONAL STRONG THUNDERSTORMS COULD DEVELOP ACROSS THESE MUNICIPALITIES THROUGH AT LEAST 215 PM AST. 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 136 PM AST JUEVES 8 DE MAYO DE 2014 PRC059-093-121-153-081815- GUAYANILLA PR-MARICAO PR-SABANA GRANDE PR-YAUCO PR- 136 PM AST JUEVES 8 DE MAYO DE 2014 A LAS 1:31 PM AST...METEOROLOGOS DEL SERVICIO NACIONAL DE METEOROLOGIA DETECTARON UNA FUERTE TRONADA SOBRE YAUCO Y SABANA GRANDE...CASI ESTACIONARIA. ESTA FUERTE TRONADA ES CAPAZ DE PRODUCIR LLUVIAS TORRENCIALES...RELAMPAGOS PELIGORSOS Y GRANIZO PEQUENO. FUERTES TRONADAS ADICIONALES PUEDEN DESARROLLARSE A TRAVES DE ESTOS MUNICIPIOS HASTA AL MENOS LAS 2:15 PM AST. LLUVIAS FUERTES PUDIERAN INUNDAR AREAS BAJAS COMO ALCANTARILLAS Y BADENES. EVITE ESTAS AREAS Y NO INTENTE CRUZAR CALLES INUNDADAS YA QUE PUDIERA SER ARRASTRADO POR LAS AGUAS. LOS NIVELES DE AGUA DE LOS RIACHUELOS Y RIOS PUDIERAN AUMENTAR...POR LO TANTO...BUSQUE TERRENO MAS ALTO DE SER AMENAZADO POR INUNDACIONES. RELAMPAGOS INTENSOS ESTAN SIENDO REPORTADOS POR ESTA TORMENTA. SI ESTA EN EL EXTERIOR...MANTENGASE ALEJADO DE OBJETOS ALTOS COMO LOS ARBOLES. MUEVASE AL INTERIOR DE SER POSIBLE. ER/DS
The San Juan radar (TJUA), 34 km away, was scanning. The volume nearest the first event began at 17:59 UTC.
28 flash flood, 1 flood, 1 heavy rain. Local standard time, as filed.
Flooded road between Avenida De Diego and Avenida Roosevelt, near Banco Popular and Puma gas station.
Rio Piedras river went out of its banks at Andaluc a street.
Road flooded at Fragoso Avenue. Waters reached Sears department store.
A house was reported flooded at street 206, Country Club sector.
Car trapped under flood waters at Monserrate Ave. on the corner with Comandante Ave.
Road flooded at Villa Nevares, street 19.
Flooded residence at Villa Carolina, along street 72, house number 3.
Road flooded at Villa Fontana VIA 19.
Campo Rico Avenue flooded near Para so Chino restaurant.
House flooded at the intersection of Bernardo Street and Andres Arus Street num. 152B.
Road 190 km. 1.5 flooded at Barrio Sabana Abajo.
House flooded at Villa Carolina 70 street.
Am rico Miranda Avenue near Reparto Metropolitano flooded.
De Diego Avenue flooded near Aurorita Rest.
The 65th Infantry Ave. near Buen Consejo St. flooded.
Chardon Avenue was reported flooded.
House was reported flooded at 1013 Fordham street at University Gardens.
House was reported flooded at street 9, 604 Parcelas Hill Brothers sector.
A house was reported flooded at Urb. Las Americas, San Salvador Street, 962-A.
Road flooded at Villa Fontana, Via 19 QR-32.
Road 2 flooded a Urb Los Maestros.
Road flooded and car trapped under water near Coliseo Guillermo Angulo and Carlos de Senabria school.
Road flooded and car trapped under water near Coliseo Guillermo Angulo and Carlos de Senabria school.
Road and homes flooded at Barrio Saint Just, street 8.
Road flooded at Urb El Vedado Rodrigo de Triana number 115.
Landslide in the intersections of road PR-53 and PR-192.
Road PR-31 at sector La Fe Was reported impassable.
Landslide at road PR-191. A Car was swept away at Rio Espiritu Danto.
Road PR-983 and PR-988 were reported flooded and impassable.
Car was swept away at PR-3 Near Residential area El Cemi.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Puerto Rico in 2014Every state in 2014This day in weather historyWarnings in Puerto Rico, May 2014
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: 518944, 520800, 520808, 520811, 521003, 521004, 521005, 521006, 521007, 521247, 521248, 521249, 521250, 521251, 521253, 522359, 522369, 522377, 522446, 522458, 523372, 523379, 523380, 523390, 523393, 523407, 523409, 523410, 523416, 523408.