Showers and thunderstorms developed across PR and USVI, due to a tropical wave moving across the area.
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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.
Showers and thunderstorms developed across PR and USVI, due to a tropical wave moving across the area.
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 29, 1:59 PM AST, 1 hour 1 minute earlier.
Area Forecast Discussion
National Weather Service San Juan PR
159 PM AST Sun Sep 29 2019
.SYNOPSIS...
The departing tropical wave will continue to provide increased
moisture across the forecast area this afternoon. This will lead to
enhancement of convective activity due to local effects and diurnal
heating, causing showers and isolated thunderstorms, especially in
northern portions of Puerto Rico. A slow, slight drying trend is
expected for tomorrow into Tuesday; daytime heating and local
effects will still provide for some shower and isolated thunderstorm
activity in the afternoons, though. Midweek will see drier than
average conditions, lasting into the end of the workweek. Late
Friday or Saturday will bring a weak tropical wave to the area, once
again increasing moisture across the islands.
&&
.SHORT TERM...Today through Tuesday...
Moisture remains in place over the area as the tropical wave pulls
away to the west, and will act to enhance showers and isolated
thunderstorms caused by local effects and diurnal heating. There
is the potential for significant rainfall locally associated with
this convective activity, and therefore a risk of urban and small
stream flooding. Shower activity has already developed in
northeastern portions of the Puerto Rico, to the east and
southeast of the San Juan metro area, as well as between St. Croix
and St. Thomas. Later this afternoon, it is expected that further
development will occur along northern portions of Puerto Rico.
Decreasing moisture is expected overnight, with a pulse of
slightly higher moisture levels anticipated to move over the
islands during the day tomorrow. This will act to fuel more
showers and isolated thunderstorms in northern Puerto Rico during
the afternoon tomorrow in the southerly flow. Though these showers
are not expected to be as strong as today's, there remains the
risk for urban and small stream flooding. Drier conditions are
likely for Tuesday. The southerly flow will continue, however, and
will likely bring somewhat higher than average temperatures. This
warmth will likely combine with local effects and the available
moisture to bring afternoon showers and isolated thunderstorms
during the afternoon.
.LONG TERM...Wednesday through Monday...From Prev Discussion...
A mid to upper ridge is expected to build overhead during the middle
and latter half of the work week. This will produce a somewhat drier
and more stable weather conditions with mainly fair weather
conditions expected across most of the area. However, there will
still be sufficient low-level moisture available that it will
combine with strong daytime heating and local effects to generate
some afternoon convection across the western half of Puerto Rico.
A weak tropical wave may affect the local area by next Saturday,
increasing the rain chances once again. Then, a more potent
tropical wave may follow on its heels by early the following week.
&&
.AVIATION...
MVFR in SHRA/isold TSRA in eastern PR could impact TJSJ
thru 22z. SHRA/TSRA with MVFR/IFR and mtn obscurations spreading
over most of the interior and north central sections of PR for the
rest of the afternoon hours. Sfc winds VRB 10 kt or less except
higher gusts near TSRA. Mainly VFR conditions expected to prevail
aft 30/06z across all the terminals.
&&
.MARINE...From Prev Discussion... A long dominant period east
northeast swell generated by Hurricane Lorenzo, located well east
northeast of the region, is expected to affect the local waters
today through the first half of the work week. This will result in
choppy and rough seas of up to 7-8 feet across portions of the
local Atlantic waters, where small craft advisories are in effect.
Across the Caribbean waters, seas of less than 5 feet are
expected. A tropical wave currently moving across the area will
result in periods of showers and thunderstorms for today.
For beachgoers, there is a high risk of rip currents for the
northwestern beaches of Puerto Rico. Elsewhere, there is a low to
moderate risk of rip currents.
&&
.PRELIMINARY POINT TEMPS/POPS...
SJU 89 78 91 79 / 90 20 70 10
STT 87 79 86 79 / 50 40 20 20
&&
.SJU WATCHES/WARNINGS/ADVISORIES...
PR...High Rip Current Risk through Monday afternoon for Northwest.
VI...None.
AM...Small Craft Advisory until 2 AM AST Monday for Anegada Passage
Southward to 17N-Coastal Waters of Northern USVI and
Culebra out 10 NM.
Small Craft Advisory until 2 PM AST Monday for Atlantic Waters
of Puerto Rico and USVI from 10 NM to 19.5N.
&&
SHORT TERM...DS
LONG TERM....CRSPerspectivas sobre Condiciones Peligrosas del Tiempo Servicio Nacional de Meteorologia San Juan PR 432 AM AST domingo 29 de septiembre de 2019 AMZ710>745-PRZ001>013-300845- 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- 432 AM AST domingo 29 de septiembre de 2019 Esta perspectiva sobre las condiciones peligrosas del tiempo es para Puerto Rico y las aguas costeras adyacentes del Atlantico. .Dia Uno...Hoy y Esta noche .Tronadas...Existe una probabilidad de tronadas con relampagos, lluvia fuerte y vientos en rafagas son posibles sobre la mayoria de Puerto Rico, incluyendo Vieques y Culebra. .Inundaciones...Lluvia fuerte pudiera causar inundaciones urbanas y de riachuelos en el interior de Puerto Rico. .Inundaciones...Lluvia fuerte pudiera resultar en inundaciones urbanas y de riachuelos. Algunos rios pudieran experimentar aumento subito e y salirse de sus cauces. .Oleaje...Se espera oleaje picado de hasta 7 pies a traves de las aguas del Atlantico debido al distante huracan Lorenzo. .Corrientes Marinas...Existe un riesgo alto de corrientes marinas para las playas del noroeste de Puerto Rico hoy y esta ncohe. .Calor...Vientos del sur, pero mayormente humedad alta resultara en algunas areas bajas con indices de calor por encima de los 102 grados Fahrenheit. .Dias dos hasta el siete...lunes a sabado Tronadas aisladas sobre sectores del interior de Puerto Rico son de esperarse para cada tarde. Con vientos del sur, los indices de calor estaran entre 102-107 grados en algunas areas bajas. El riesgo alto de corrientes marinas se extenderas a traves de Puerto Rico durante mitad de semana y continuara hasta el jueves. .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 marinas al Servicio Nacional de Meteorologia en San Juan. AMZ715-725-VIZ001-002-300845- San Tomas, San John y Islas Adyacentes- Santa Cruz-Aguas cercanas del Atlantico y aguas costeras adyacente del Caribe- 432 AM AST domingo 29 de septiembre de 2019 .Dia Uno...Hoy y esta noche .Tronadas...Existe una probabilidad de tronadas con lluvia fuerte y vientos en rafagas para esta tarde a traves del norte de las Islas Virgenes Estadounidenses. .Inundaciones...Lluvia fuerte resultara en inundaciones urbanas y de riachuelos. .Oleaje...e espera oleaje picado de hasta 7 pies a traves de las aguas del Atlantico debido al distante huracan Lorenzo. Pudiera llegar a los 9 pies entre Anegada y Prickly Pear y al este, en las aguas llanas. .Corrientes Marinas...Existe un riesgo moderado de corrientes marinas para la mayoria de las costas de las Islas Virgenes Estadounidenses. .Calor...Humedad alta resultara en algunas areas, mayormente en Santa Cruz con indices de calor por encima de los 102 grados Fahrenheit. .Dias dos hasta el siete...lunes a sabado Indices de calor estaran entre los 102-107 grados en algunas areas bajas de las Islas Virgenes Estadounidenses, especialmente luego del lunes. El riesgo alto de corrientes marinas sera moderado para algunas playas. .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 marinas al Servicio Nacional de Meteorologia en San Juan. Juan.
The San Juan radar (TJUA), 36 km away, was scanning. The volume nearest the first event began at 18:59 UTC.
2 flash flood, 1 lightning. Local standard time, as filed.
Lightning strike struck a house at Calle Portugal in Vistamar sector. The lightning strike caused a fire at the house.
Emergency management official reported that Rio Blanco had flooded due to a water surge from the rain in higher terrain, flooding Road PR-31.
Road PR-191 was flooded as a result of Rio Blanco going out of its banks due to a water surge from the rain in higher terrain.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Puerto Rico in 2019Every state in 2019This day in weather historyWarnings in Puerto Rico, September 2019
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: 856344, 857413, 857414.