Moist and unstable weather conditions affected Puerto Rico. Very heavy rainfall felt across 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.
Moist and unstable weather conditions affected Puerto Rico. Very heavy rainfall felt across Puerto Rico. Some flooding occurred with mudslides also reported as soils were very saturated due to previous heavy rainfall events.
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 Nov 20, 2:09 PM AST, 1 hour 16 minutes earlier.
Area Forecast Discussion
National Weather Service San Juan PR
209 PM AST Sun Nov 20 2016
.SYNOPSIS...A moist and unstable weather pattern will continue
to prevail through at least Tuesday morning as trofiness and
plenty of low level moisture dominates the northeast Caribbean.
The potential for flooding as well as mudslides continues. A
Flash Flood Watch still in effect for all Puerto Rico.
&&
.DISCUSSION...Mid level trough will continue to prevail across the
western Atlantic and into the Greater Antilles through Tuesday while
weakening. At lower levels, a frontal boundary across the northeast
Caribbean will continue to induce a surface trough as well as
moisture convergence across the local islands. As a result through
Tuesday, under trofiness and moisture convergence, the potential
for showers with thunderstorms will continue to be high. The
strongest and widespread activity will be focused over Puerto Rico
during the late morning through early evening hours due to
enhancement associated with diurnal heating and local effects.
During the late evening and overnight hours, shower and thunder
activity is expected across the coastal areas but mostly over the
regional waters. Across Culebra, Vieques and the U.S. Virgin
Islands, still expect periods of scattered to locally numerous
showers with isolated thunderstorms overnight and early morning
hours. Due to already saturated soils, potential for urban and
small stream flooding as well as sharp rises along rivers continues.
Mudslides in areas of steep terrain is likely.
As the trough moves away and the moisture convergence zone north
northwest of the area weakens, weather conditions are expected to
slowly improve Wed-Thu. However, precipitable water will remain
above the normal range with locally induced showers and thunderstorms
likely. As a strong surface high establishes across the western
and central Atlantic by the end of the week, erosion of low level
moisture is expected with mainly fair weather conditions Friday
and into the upcoming weekend.
&&
.AVIATION...SHRA/TSRA across the interior sections of PR will
continue to develop through the rest of the afternoon hours. Mtn
top obscd and tempo MVFR conds possible across mainland PR
terminals. Frontal boundary will continue over the NW waters of PR
through the fcst period. SHRA with possible isld TSTMS expected
across the Atlantic waters and with a northerly wind component
could reach the northern terminals. Sct-Num showers expected to
continue over the waters affecting much of the flying area with
VCSH/VCTS and possible -RA at times across the rest of terminals.
Sfc winds light and variable overnight.
&&
.MARINE...A short-period swell will invade the offshore Atlantic
waters late tonight and persist through Monday night. Small craft
advisory for the offshore Atlantic waters in effect later tonight.
Seas up to 7 feet are expected.
&&
.PRELIMINARY POINT TEMPS/POPS...
SJU 76 85 76 85 / 50 60 40 40
STT 76 86 76 87 / 50 60 50 50
&&
.SJU WATCHES/WARNINGS/ADVISORIES...
PR...Flash Flood Watch through Monday evening for Central Interior-
Culebra-Eastern Interior-Mayaguez and Vicinity-North
Central-Northeast-Northwest-Ponce and Vicinity-San Juan and
Vicinity-Southeast-Southwest-Vieques-Western Interior.
VI...None.
AM...Flash Flood Watch through Monday evening for Coastal Waters OF
Southwestern Puerto Rico out 10 NM-Coastal Waters of
Southern Puerto Rico out 10 NM.
Small Craft Advisory from 2 AM Monday to 6 AM AST Tuesday for
Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N.
&&
13/23PERSPECTIVAS SOBRE CONDICIONES PELIGROSAS DEL TIEMPO...CORRECCION SERVICIO NACIONAL DE METEOROLOGIA SAN JUAN PR 537 AM AST DOMINGO 20 DE NOVIEMBRE DE 2016 AMZ710>745-PRZ001>013-210945- SAN JUAN Y VECINDAD-NORESTE-SURESTE- ESTE INTERIOR-NORTE CENTRAL-CENTRAL INTERIOR-PONCE Y VECINDAD- NOROESTE-OESTE INTERIOR-MAYAGUEZ Y VECINDAD-SUROESTE-CULEBRA-VIEQUES- AGUAS COSTERAS Y MAR AFUERA DEL ATLANTICO Y DEL CARIBE- 537 AM AST DOMINGO 20 DE NOVIEMBRE DE 2016 ESTA PERSPECTIVA SOBRE LAS CONDICIONES DEL TIEMPO PELIGROSAS ES PARA PUERTO RICO Y LAS AGUAS COSTERAS ADYACENTES DEL ATLANTICO. .DIA UNO...HOY Y ESTA NOCHE .TRONADAS...EXISTE UNA PROBABILIDAD DE TRONADAS DISPERSAS CON LLUVIAS FUERTES Y VIENTOS EN RAFAGAS BREVES ESTA TARDE A TRAVES DE PORCIONES DE LAS ISLAS LOCALES Y LAS AGUAS REGIONALES. .INUNDACIONES...INUNDACIONES REPENTINAS ES POSIBLE HOY. DEBIDO A SUELOS YA SATURADOS, LLUVIAS FUERTES ADICIONALES PROBABLEMENTE RESULTARAN INUNDACIONES URBANAS Y DE RIACHUELOS AL IGUAL QUE INCREMENTOS RAPIDOS A LO LARGO DE RIOS Y RIACHUELOS .OLAS/OLEAJE...OLEAJE PICADO/VIGOROSO DE HASTA 6 PIES SE ESPERAN A TRAVES DE LAS AGUAS COSTERAS MAR AFUERA DEL ATLANTICO. .CORRIENTES SUBMARINAS... EXISTE UN RIESGO MODERADO DE CORRIENTES SUBMARINAS PARA LAS PLAYAS DEL ATLANTICO. .DIAS DOS HASTA SIETE...LUNES A SABADO UN PATRON MOJADO Y INESTABLE SE PRONOSTICA QUE PERSISTA SOBRE LA REGION HASTA TEMPRANO LA SEMANA PROXIMA. DEBIDO A SUELOS YA SATURADOS, CUALQUIER LLUVIA FUERTE ADICIONAL PROBABLEMENTE RESULTARA INUNDACIONES URBANAS Y DE RIACHUELOS AL IGUAL QUE INCREMENTOS RAPIDOS A LO LARGO DE RIOS Y RIACHUELOS. DESLIZAMIENTOS DE LODO Y ROCA TAMBIEN SON POSIBLES EN AREAS DE TERRENO EMPINADO A TRAVES DE PUERTO RICO. .COMUNICADO SOBRE INFORMACION REPORTADA POR OBSERVADORES... NO SE ANTICIPA ACTIVACION AMPLIA DE OBSERVADORES, SIN EMBARGO, SE LES EXHORTA A LOS OBSERVADORES A REPORTAR INUNDACIONES Y CORRIENTES SUBMARINAS AL SERVICIO NACIONAL DE METEOROLOGIA EN SAN JUAN. AMZ715-725-VIZ001-002-210945- SAN TOMAS SAN JOHN E ISLAS ADYACENTES-SANTA CRUZ- AGUAS CERCA DE LA COSTA DEL ATLANTICO Y AGUAS COSTERAS ADYACENTES DEL CARIBE- 537 AM AST DOMINGO 20 DE NOVIEMBRE DE 2016 ESTA PERSPECTIVA SOBRE LAS CONDICIONES PELIGROSAS DEL TIEMPO ES PARA LAS ISLAS VIRGENES AMERICANAS Y LAS AGUAS COSTERAS ADYACENTES. .DIA UNO...HOY Y ESTA NOCHE .TRONADAS...EXISTE UNA PROBABILIDAD LEVE DE TRONADAS CON LLUVIAS FUERTES SOBRE LAS ISLAS LOCALES Y LAS AGUAS REGIONALES EN OCASIONES. .INUNDACIONES...LLUVIAS FUERTES PODRIAN RESULTAR INUNDACIONES URBANAS Y EN AREAS DE POBRE DRENAJE ESPECIALMENTE A TRAVES DE SAN TOMAS. .OLAS/OLEAJE...OLEAJE PICADO DE HASTA 6 PIES SE ESPERAN A TRAVES DE LAS AGUAS COSTERAS MAR AFUERA DEL ATLANTICO. .CORRIENTES SUBMARINAS...EXISTE UN RIESGO MODERADO DE CORRIENTES SUBMARINAS PARA LAS PLAYAS DEL NORTE DE SAN TOMAS Y SANTA CRUZ. .DIAS DOS HASTA SIETE...LUNES A SABADO UN PATRON MOJADO Y INESTABLE SE PRONOSTICA QUE PERSISTA SOBRE LA REGION. ESTE PATRON MOJADO Y INESTABLE ESTA FAVORABLE PARA EL DESARROLLO DE AGUACEROS Y TRONADAS A TRAVES DE PORCIONES DE LAS ISLAS Y LAS AGUAS COSTERAS HASTA TEMPRANO LA SEMANA PROXIMA. .COMUNICADO SOBRE INFORMACION REPORTADA POR OBSERVADORES... NO SE ANTICIPA ACTIVACION AMPLIA DE OBSERVADORES, SIN EMBARGO, SE LES EXHORTA A LOS OBSERVADORES A REPORTAR INUNDACIONES Y CORRIENTES SUBMARINAS AL SERVICIO NACIONAL DE METEOROLOGIA EN SAN JUAN.
The San Juan radar (TJUA), 19 km away, was scanning. The volume nearest the first event began at 19:26 UTC.
6 flood, 3 heavy rain, 1 flash flood. Local standard time, as filed.
Highway PR-1 was closed in both directions due to flooding at KM 27.2.
Mudslide was reported at barrio Pozas on the Pozas Highway.
Mudslide was reported on Highway PR-605,KM 3.3 at Barrio Vivi Arriba affecting a home.
Mudslide on Highway PR-900 Km,9.3 sector Playita arriba in front of a home.
Highway PR 123 crossing Rio Grande de Arecibo at Salto Arriba, flooded.
Intersection of Calle Colombia and Notredame flooded in the urbanization University Gardens.
Highway 332, in Guanica was flooded at sector Puig.
Home flooded in Urbanization Cielo Dorado, on Highway 693, house 125K.
Route 21 in Barrio Obrero, flooded, street in front of Centro Medico.
Street flooded in front of Lila building entering Barbosa Avenue, Barriada Israel, Hato Rey.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Puerto Rico in 2016Every state in 2016This day in weather historyWarnings in Puerto Rico, November 2016
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: 666236, 666237, 666238, 666239, 666328, 666329, 666331, 666332, 667057, 667056.