Heavy Rain, Toa Baja
- When
- September 8, 1:10 PM AST to 3:30 PM AST
- Where
- Toa Baja County, 2.63 mi WNW of Toa Baja to 2.72 mi WNW of Toa Baja
- Reported by
- Public
- Coordinates
- 18.443, -66.238
A 1.35 in of rain were reported in downtown Toa Baja.
Heavy Rain in Puerto Rico, September 8, 2016
An upper level trough continued moving across the region. This pattern resulted in an increase of low level moisture across the local islands.
Where it happened
Every event with a place to put it. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 1
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.
What happened
The episode as NWS SJU wrote it up.
An upper level trough continued moving across the region. This pattern resulted in an increase of low level moisture across the local islands. A tropical wave continued moving west northwest reaching the region producing an increase in showers and thunderstorms.
What forecasters said that day
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 Sep 8, 11:12 AM AST, 1 hour 58 minutes earlier.
Area forecast discussion, Sep 8, 11:12 AM AST, 1 hour 58 minutes before
Area Forecast Discussion National Weather Service San Juan PR 1112 AM AST THU SEP 8 2016 .UPDATE...Some light to moderate showers affected the eastern half of Puerto Rico and the U.S. Virgin Islands. Later in the morning...showers developed in the vicinity of Ponce with rainfall accumulation up to one inch in some localized areas. Showers and thunderstorms are expected to develop this afternoon over the western interior and northwest sections of Puerto Rico. No changes needed to forecast grids this morning. && .AVIATION...Mainly VFR conditions expected across the local flying area through the forecast period. However,SHRA/TSRA expected across western PR and along the Cordillera Central, between 17-22Z, resulting in periods of MVFR conditions and mountain obsc in/around TJMZ/TJBQ. Low level winds expected from the east- southeast at 10-15 knots with sea breeze variations after 16Z. && .MARINE...No changes from previous discussion. && .PREV DISCUSSION... /issued 529 AM AST THU SEP 8 2016/ SYNOPSIS...Upper level trough over the Lesser Antilles will move across the region on Friday. This trough aloft will increase the instability across the local islands...enhancing the trade wind showers and the intensity of the afternoon thunderstorms over the next few days. A tropical wave is forecast to cross the islands on Saturday...bringing a few rounds of showers and thunderstorms. DISCUSSION...Low level moisture embedded in the trade winds will continue to push showers across the windward areas the rest of this morning. Afternoon convection will develop over the west interior...west and northwest portions of Puerto Rico. Similar pattern is forecast on Friday. Although...a relatively dry air mass will prevail at mid levels the rest of the work week...the proximity of the upper level trough will enhance the afternoon convection. Therefore...expect isolated strong thunderstorms with heavy rainfall over the west portions of the islands each afternoon. The next surge of moisture is associated with a tropical wave. At this time...operational models suggest that the deep moisture associated with the tropical wave will spread over the local islands on Saturday...when the winds shift from the southeast. Therefore...showers and thunderstorms are likely develop and affect portions of Puerto Rico from time to time. Moisture and instability will diminish somewhat early next week. However... near normal moisture and some conditional instability will support scattered showers from Sunday to Tuesday. AVIATION...Mainly VFR conditions expected across the local flying area through the forecast period. However, trade wind showers with tops around FL200 could briefly affect the leeward/USVI terminals. SHRA/TSRA expected across western PR and along the Cordillera Central, between 17-22Z, resulting in periods of MVFR conditions and mountain obsc in/around TJMZ/TJBQ. Low level winds expected from the east-southeast at 10-15 knots with sea breeze variations after 13Z. MARINE...Seas are subsided to 3-5 feet across of the local waters. Winds will continue between 10-15 knots...except in the coastal waters of northern Puerto Rico where winds could reach 20 knots at times. Therefore...Small Craft Operations should exercise caution due to winds up to 20 knots. No Small Craft Advisories are anticipated over the next 7 days. && .PRELIMINARY POINT TEMPS/POPS... SJU 91 80 93 80 / 20 10 30 20 STT 89 80 90 81 / 20 40 40 40 && .SJU Watches/Warnings/Advisories... PR...None. VI...None. AM...None. && 71/72
Hazardous weather outlook, Sep 8, 6:19 AM AST, 6 hours 51 minutes before
PERSPECTIVAS SOBRE CONDICIONES PELIGROSAS DEL TIEMPO SERVICIO NACIONAL DE METEOROLOGIA SAN JUAN PR 514 AM AST JUEVES 8 DE SEPTIEMBRE DE 2016 AMZ710>745-PRZ001>013-090915- SAN JUAN Y VECINDAD-NORESTE-SURESTE- INTERIOR ESTE-CENTRAL NORTE-INTERIOR CENTRAL-PONCE Y VECINDAD- NOROESTE-INTERIOR OESTE-MAYAGUEZ Y VECINDAD-SUROESTE-CULEBRA-VIEQUES- AGUAS COSTERAS Y MAR AFUERA DEL ATLANTICO Y DEL CARIBE- 514 AM AST JUEVES 8 DE SEPTIEMBRE 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 CON LLUVIAS FUERTES Y VIENTOS EN RAFAGAS BREVES ESTA TARDE A TRAVES DE PORCIONES DEL OESTE DE PUERTO RICO. .INUNDACIONES...LLUVIAS FUERTES PODRIAN RESULTAR INUNDACIONES URBANAS Y DE RIACHUELOS. .VIENTOS...VIENTOS SOSTENIDOS ALREDEDOR DE 20 MPH SE ESPERAN A TRAVES DE LAS AGUAS DEL ATLANTICO. .CORRIENTES SUBMARINAS...EXISTE UN RIESGO MODERADO DE CORRIENTES SUBMARINAS A TRAVES DE LAS COSTAS DEL ATLANTICO DE LAS ISLAS. .CALOR...INDICES DE CALOR MAYOR DE 102 GRADOS SON POSIBLES EN LAS AREAS COSTERAS DEL OESTE Y NOROESTE DE PUERTO RICO. .DIAS DOS HASTA SIETE...VIERNES A MIERCOLES UNA ONDA TROPICAL SE PRONOSTICA SE MUEVA A TRAVES DEL ESTE DEL CARIBE TARDE ENTRE EL VIERNES Y SABADO AUMENTANDO LA ACTIVIDAD DE AGUACEROS Y TRONADAS CON VIENTOS EN RAFAGAS A TRAVES DEL AREA DE PRONOSTICO. EL RIESGO MODERADO DE CORRIENTES SUBMARINAS SE ESPERA CONTINUE MAYORMENTE A TRAVES DE LAS COSTAS DEL ATLANTICO DURANTE LOS PROXIMOS DIAS. .COMUNICADO SOBRE INFORMACION REPORTADA POR OBSERVADORES... NO SE ANTICIPA ACTIVACION AMPLIA DE OBSERVADORES...SIN EMBARGO...SE LES EXHORTA A LOS OBSERVADORES INDIVIDUALES A REPORTAR INUNDACIONES Y CORRIENTES SUBMARINAS AL SERVICIO NACIONAL DE METEOROLOGIA EN SAN JUAN. AMZ715-725-VIZ001-002-090915- SAN TOMAS SAN JOHN E ISLAS ADYACENTES- SANTA CRUZ-AGUAS CERCA DE LA COSTA DEL ATLANTICO Y AGUAS COSTERAS ADYACENTES DEL CARIBE- 514 AM AST JUEVES 8 DE SEPTIEMBRE 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 .CORRIENTES SUBMARINAS...EXISTE UN RIESGO MODERADO DE CORRIENTES SUBMARINAS PARA ALGUNAS DE LAS PLAYAS A LO LARGO DE LAS COSTAS DEL ATLANTICO DE SANTA CRUZ Y SAN THOMAS. .DIAS DOS HASTA SIETE...VIERNES A MIERCOLES UNA ONDA TROPICAL SE PRONOSTICA SE MUEVA A TRAVES DEL ESTE DEL CARIBE ENTRE EL VIERNES Y SABADO AUMENTANDO LA ACTIVIDAD DE AGUACEROS Y TRONADAS CON VIENTOS EN RAFAGAS A TRAVES DEL AREA DE PRONOSTICO. EL RIESGO MODERADO DE CORRIENTES SUBMARINAS SE ESPERA CONTINUE MAYORMENTE A TRAVES DE SANTA CRUZ DURANTE LOS PROXIMOS DIAS. .COMUNICADO SOBRE INFORMACION REPORTADA POR OBSERVADORES... NO SE ANTICIPA ACTIVACION AMPLIA DE OBSERVADORES...SIN EMBARGO...SE LES EXHORTA A LOS OBSERVADORES INDIVIDUALES A REPORTAR CORRIENTES SUBMARINAS AL SERVICIO NACIONAL DE METEOROLOGIA EN SAN JUAN.
The radar
The national radar mosaic for the moment the first event began.
Event by event
1 heavy rain. Local standard time, as filed.
What these are
- Heavy Rain
- Rainfall totals unusual for the place and season that did not produce a flood.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Flash Flooding in Indiana, September 8, 2016
- Flash Flooding and Flooding in Kansas, September 8 to 10, 2016
- Flash Flooding and Damaging Wind in Indiana, September 8 to 9, 2016
- Damaging Winds in New York, September 8, 2016
- Flash Flooding and Hail in Missouri, September 8 to 10, 2016
- Damaging Winds in Pennsylvania, September 8, 2016
- Damaging Winds in Pennsylvania, September 8, 2016
- Damaging Winds in New York, September 8, 2016
- Hail and Damaging Winds in Kansas, September 8, 2016
- Flash Flooding and Damaging Wind in Ohio, September 8 to 9, 2016
- Flash Flooding in Arkansas, September 8, 2016
- Waterspout in Gulf of Mexico, September 8, 2016
More
Every storm in Puerto Rico in 2016Every state in 2016This day in weather historyWarnings in Puerto Rico, September 2016
Sources
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: 661214.