Puerto Rico, 2020

Rip Current in Puerto Rico, September 18, 2020

September 18, 2020 · NWS SJU · 1 event in 1 county or zone

S. Coast Guard in La Pocita, Pi ones area in Loiza.

The toll

Deaths
2
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.

Two bodies (a male and a female) were rescued by the U.S. Coast Guard in La Pocita, Pi ones area in Loiza.

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 18, 11:47 AM AST, 2 hours 28 minutes earlier.

Area forecast discussion, Sep 18, 11:47 AM AST, 2 hours 28 minutes before
Area Forecast Discussion
National Weather Service San Juan PR
1147 AM AST Fri Sep 18 2020

.UPDATE...

The biggest concern for today are the dangerous marine and coastal
conditions playing out across the region, particularly for the
northern and eastern exposed beaches. A northeasterly swell is
currently impacting the region, and so far forecast models have
underestimated the intensity of this swell. Given the high rip
current risk and high surf expected, ALL SHOULD EXERCISE GREAT
CAUTION AT ANY LOCAL NORTHERN AND EASTERN FACING BEACHES.

The sounding from this morning showed drier air and more wind at
low levels compared to the models. This is important, since it
will likely lead to less rainfall than was was initially expected.
The biggest concern was that slow low-level winds would result in
stationary showers and high rainfall accumulations. Though that
concern has lessened, it is still possible that showers this
afternoon lead to isolated areas of flooding. Isolated
thunderstorms are also possible this afternoon. Tomorrow will be
more active due to an upper-level trough moving west of the area.
This will lead to higher rainfall amounts and scattered
thunderstorms, some which may produce frequent lightning. Given
the very light winds for tomorrow, the highest rainfall will
likely be over the interior of Puerto Rico.

&&

.AVIATION...

Though VFR conds will generally prevail, TEMPO conds possible at
TJPS for 17-23z. VCSH/VCTS possible at all other terminals. Winds
generally out of the NE at 5-15 kts with modifications from sea
breezes. Light winds overnight with isolated showers over the
smaller islands and E Puerto Rico coast.

&&

.MARINE...

Hazardous marine conditions will prevail over the next several
days due primarily to a NE swell from Hurricane Teddy, but also
from a smaller swell from Post-Tropical Cyclone Paulette. A High
Rip Current Risk is in effect for the northern and eastern
regional beaches, and a High Surf Advisory is also coming into
effect for this afternoon and will last through most of the
weekend. Small Craft Advisory conditions will be met for most
marine zones through the weekend and into Monday.

&&

.PREV DISCUSSION... /issued 526 AM AST Fri Sep 18 2020/

SYNOPSIS...

A weak upper-level low will sink into the regional waters over the
next several days and create favorable upper-level conditions now
through the weekend. Modest low-level moisture, local and diurnal
effects will induce showers and isolated thunderstorms during the
afternoons. Light steering winds will cause convection to move
slowly, and could lead to urban and small stream flooding during
the weekend through next week. Hurricane Teddy will generate east
to northeast swells that will impact the regional waters through
Monday. Therefore, expect hazardous marine conditions today
through early next week.

SHORT TERM...Today through Sunday...

A weak upper level low over the Atlantic waters is forecast to sink
further south and into our region through the short term period.
Meanwhile, Major Hurricane Teddy currently located near 21N and 55W
will continue to track northwest and pull further away from
northeastern Caribbean. This will promote a light to moderate
northeasterly steering wind flow across the region. Therefore,
passing showers will continue to move from time to time today and
through at least tonight. During the afternoon hours, showers with
iso thunderstorms should develop over the Cordillera Central and
southern portions of PR.

As the upper low moves to our north/northwest and a light low-level
southerly wind flow establishes through the weekend, showers and
thunderstorms that develops during the afternoon hours are expected
to move slow over the same areas and this could cause urban and
small stream flooding. Including in and around the San Juan metro
area on Saturday. Max temps during the weekend could reach the low
90s across most of the lower elevations of the islands.

LONG TERM...Monday through Saturday...

The long-term period will be plagued with weak surface lows west of
Puerto Rico and TUTT lows to the east of the island that will move
near the island by mid-week. The global models have consistently
showed the above scenario over the last couple of days. The upper-
level conditions are expected to become relatively favorable due to
the proximity of the lows mentioned above.  The ECMWF and GFS have
500 mb temperatures cooling to -6 to -7 degrees celsius through most
of the work week. The favorable upper-level conditions should aid in
the development of deep convection during afternoons; however, this
also depends on how much low-level moisture returns over the area,
when Hurricane Teddy's tail lifts north of the region. Currently,
the GFS and EURO has near normal moisture across the region.
Additionally, light steering winds less than 10 kts will cause
showers and isolated thunderstorms that develop to move slowly, thus
leading to urban and small stream flooding and ponding of water on
roadways.

Friday and Saturday, guidance keeps relatively favorable upper-level
conditions, however, shows low-level moisture dropping below the
climatological average. Nevertheless, showers and isolated
thunderstorms are possible during the afternoons due

AVIATION...

Mainly VFR conditions are expected to prevail across all
terminals. Tempo MVFR possible at JPS btw 16z-22z. Northeasterly
winds around 10 kts with sea breeze variations are expected.

MARINE...

Hurricane Teddy will produce northerly swells over the regional
and local waters now through early next week. Marine conditions
will continue to deteriorate now through early next week. Seas up
to 10 feet across the the outer Atlantic waters and the Anegada
passage. A small craft advisory is in effect for the outer
Atlantic, Caribbean, and Anegada passage due to choppy and
hazardous seas. Elsewhere, small craft operators are urged to
exercise caution due to choppy marine condtions. There is a high
risk of rip currents for the northern and eastern beaches of
Puerto Rico. Also, for the beaches of the of Culebra, Saint
Thomas, and Cramer Park beach.

&&

.PRELIMINARY POINT TEMPS/POPS...
SJU  89  78  89  78 /  30  30  60  30
STT  88  79  88  79 /  50  30  30  30

&&

.SJU WATCHES/WARNINGS/ADVISORIES...
PR...High Rip Current Risk through Monday afternoon for Culebra-North
     Central-Northeast-Northwest-San Juan and Vicinity-Southeast.

     High Surf Advisory until 6 PM AST Sunday for North Central-
     Northeast-Northwest-San Juan and Vicinity-Southeast.

     High Rip Current Risk from 6 PM AST this evening through late
     Saturday night for Vieques.

     High Rip Current Risk from 6 PM AST this evening through Monday
     afternoon for Mayaguez and Vicinity.

     High Surf Advisory from 6 PM this evening to 2 AM AST Sunday for
     Culebra.

VI...High Surf Advisory until 6 PM AST Sunday for St Croix.

     High Rip Current Risk through late Sunday night for St Croix-
     St.Thomas...St. John...and Adjacent Islands.

     High Surf Advisory from 6 PM this evening to 2 AM AST Sunday for
     St.Thomas...St. John...and Adjacent Islands.

AM...Small Craft Advisory until 2 AM AST Sunday for Caribbean Waters
     of Puerto Rico from 10 NM to 17N-Coastal Waters of Southern
     USVI Vieques and Eastern Puerto Rico out 10 NM.

     Small Craft Advisory until 2 AM AST Monday for Coastal Waters of
     Northern Puerto Rico out 10 NM.

     Small Craft Advisory until 2 AM AST Monday for Anegada Passage
     Southward to 17N-Atlantic Waters of Puerto Rico and USVI
     from 10 NM to 19.5N-Coastal Waters of Northern USVI and
     Culebra out 10 NM.

&&

SHORT TERM...CAM
LONG TERM....MB
PUBLIC DESK...CVB
Hazardous weather outlook, Sep 18, 6:22 AM AST, 7 hours 53 minutes before
Perspectivas sobre Condiciones Peligrosas del Tiempo...ACTUALIZACION
Servicio Nacional de Meteorologia San Juan PR
505 AM AST jueves 18 de septiembre de 2020

AMZ710>745-PRZ001>013-190915-
San Juan y Vecindad-Noreste-Sureste-Este Interior-Norte Central-
Interior Central-Ponce y Vecindad-Noroeste-Oeste Interior-
Mayaguez y Vecindad-Suroeste-Culebra-Vieques-Aguas cercanas y mar
afuera del Atlantico y Caribe-
505 AM AST jueves 18 de septiembre de 2020

Esta perspectiva sobre las condiciones peligrosas del tiempo es para
Puerto Rico y las aguas costeras del Atlantico.

.Dia Uno...Hoy y esta noche

.Tronadas...Hay una probabilidad pequena de tronadas con lluvia
fuerte y vientos en rafaga durante la tarde a traves de sectores
de la Cordillera Central.

.Inundaciones...Fuertes lluvias podrian resultar en inundaciones
urbanas y de pequenos riachuelos.

.Oleaje...Oleaje picado de hasta 10 pies se espera a traves de las
aguas expuestas del norte y este.

.Corrientes Marinas...Existe un riesgo alto de corrientes
marinas para las playas del norte y este de las islas.

.Dias dos hasta el siete...viernes hasta el miercoles

Una marejada del noreste, generada por el Huracan Teddy continuara
generando condiciones maritimas peligrosas a traves del area de
pronostico. Como resultado, advertencias para operadores de pequenas
embarcaciones, riesgo alto de corrientes marinas, y advertencia de
resacas fuertes estan en efecto hasta tarde el fin de semana.
Tronadas podrian ser posibles cada tarde sobre el interior de la
isla. Esto podria causar inundaciones urbanas y de riachuelos.

.Comunicado sobre informacion reportada por observadores...

No se anticipa activacion de observadores. Favor de reportar
cualquier informacion sobre vientos, oleaje y corrientes marinas al
Servicio Nacional de Meteorologia en San Juan mientras siguen las
indicaciones de las autoridades locales y estatales.

AMZ715-725-VIZ001-002-190915-
San Tomas, San John e Islas Adyacentes-Santa Cruz-Aguas cercanas del
Atlantico y aguas costeras adyacentes del Caribe-
505 AM AST jueves 18 de septiembre de 2020

Esta perspectiva sobre las condiciones peligrosas del tiempo es para
Islas Virgenes Estadounidenses y las aguas costeras adyacentes.

.Dia Uno...Hoy y esta noche

.Inundaciones...Aguaceros podria causar acumulaciones de lluvia en areas
de pobre drenaje a traves del norte de las Islas Virgines
Estadounidenses.

.Oleaje...Oleaje picado de hasta 10 pies se espera a traves de las
aguas expuestas del norte y este.

.Corrientes Marinas...Existe un riesgo alto de corrientes
marinas para las playas del norte y este de las islas.

.Dias dos hasta el siete...viernes hasta el miercoles

Una marejada del noreste, generada por el Huracan Teddy continuara
generando condiciones maritimas peligrosas a traves del area de
pronostico. Como resultado, dvertencias para los operadores de pequenas
embarcaciones, riesgo alto de corrientes marinas, y advertencia de
resacas fuertes estan en efecto hasta tarde el fin de semana.
Principalmente para las playas y aguas expuestas del norte y este

.Comunicado sobre informacion reportada por observadores...

No se anticipa activacion de observadores. Favor de reportar
cualquier informacion sobre vientos, oleaje y corrientes marinas al
Servicio Nacional de Meteorologia en San Juan mientras siguen las
indicaciones de las autoridades locales y estatales.

Event by event

1 rip current. Local standard time, as filed.

Rip Current, Northeast

When
September 18, 2:15 PM AST
Where
Northeast forecast zone
Deaths
2 direct, 0 indirect
Reported by
Broadcast Media

Two bodies (a male and a female) were rescued by the U.S. Coast Guard in La Pocita, Pi ones area in Loiza County.

The people who died

As the offices recorded each death: direct deaths were caused by the weather itself, indirect ones by something it set in motion.

EventDateAgeSexWhereKind
Rip Current, Northeast2020-09-1829MaleIn WaterDirect
Rip Current, Northeast2020-09-1832FemaleIn WaterDirect

What these are

Rip Current
A narrow, fast current flowing away from the beach that caused a drowning or rescue.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Puerto Rico in 2020Every state in 2020This day in weather historyWarnings in Puerto Rico, September 2020

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: 954724.