Alert archive / Puerto Rico / Flash Flood Warnings in 2017

Flash Flood Warning 124, NWS JSJ

October 7, 2017

NWS JSJ issued this flash flood warning at Oct 7, 2017, 2:14 PM CDT. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Oct 7, 2017, 2:14 PM CDT (19:14 UTC)
Expired
Oct 7, 2017, 6:15 PM CDT
In force
4 hr
Issued by
NWS JSJ
Area
Storm-based polygon
Flood severity
None

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The text

As transmitted.

624 
WGCA52 TJSJ 071914
FFWSJU
PRC001-073-141-072315-
/O.NEW.TJSJ.FF.W.0124.171007T1914Z-171007T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Juan PR
Issued by National Weather Service Miami FL
314 PM AST SAT OCT 7 2017

The National Weather Service in San Juan has issued a

* Flash Flood Warning for...
  Jayuya Municipality in Puerto Rico...
  Utuado Municipality in Puerto Rico...
  Adjuntas Municipality in Puerto Rico...

* Until 715 PM AST

* At 313 PM AST, emergency management reported flash flooding across 
  the warned area. Flash flooding is already occurring including the 
  collapse of Carretera 10 near Utuado. Water was also reported to 
  be entering homes near Urban San Jose in Utuado and around 
  Adjuntas.

* Some locations that will experience flooding include...
  Jayuya, Adjuntas, Utuado and Cayuco. 

Excessive rainfall over the warned area will cause mud slides near
steep terrain. The mud slide can consist of rock, mud, vegetation 
and other loose materials.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.

&&

LAT...LON 1832 6672 1833 6662 1832 6658 1824 6656
      1820 6653 1818 6653 1815 6655 1817 6659
      1815 6663 1816 6666 1813 6668 1813 6672
      1811 6673 1813 6677 1813 6680 1819 6684
      1824 6682 1832 6682 1832 6677 1835 6674

$$

RAG
1 follow-up statement
480 
WGCA72 TJSJ 071951
FFSSJU

Flash Flood Statement
National Weather Service San Juan PR
Issued by National Weather Service Miami FL
351 PM AST SAT OCT 7 2017

PRC001-073-141-072315-
/O.CON.TJSJ.FF.W.0124.000000T0000Z-171007T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Jayuya PR-Utuado PR-Adjuntas PR-
351 PM AST SAT OCT 7 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 PM AST FOR
JAYUYA...UTUADO AND ADJUNTAS MUNICIPALITIES...

At 350 PM AST, emergency management reported flash flooding in 
Utuado and Adjuntas. Carretera 10 has collapsed in front of 
Ferreteria Amador at kilometer 42.0 and both directions of the 
highway are closed as they are impassable. Flood waters have also 
been reported to be entering homes in the warned area.

Excessive rainfall over the warned area will cause mud slides near
steep terrain. The mud slide can consist of rock, mud, vegetation and
other loose materials.

Some locations that will experience flooding include...
Jayuya, Adjuntas, Utuado and Cayuco. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.

&&

LAT...LON 1832 6672 1833 6662 1832 6658 1824 6656
      1820 6653 1818 6653 1815 6655 1817 6659
      1815 6663 1816 6666 1813 6668 1813 6672
      1811 6673 1813 6677 1813 6680 1819 6684
      1824 6682 1832 6682 1832 6677 1835 6674

$$

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS JSJ wrote its last area forecast discussion before this flash flood warning went out at Oct 7, 12:44 PM CDT, 1 hour 30 minutes earlier.

Area forecast discussion, Oct 7, 12:44 PM CDT, 1 hour 30 minutes before
Area Forecast Discussion
National Weather Service San Juan PR
Issued by National Weather Service Miami FL
144 PM AST Sat Oct 7 2017

.AVIATION...
A cluster of thunderstorms has developed across western Puerto
Rico and will continue to slowly push westward throughout the
afternoon and evening. Gusty winds near 30 knots, frequent
lightning, and reduced visibilities/ceilings are possible with
these storms. Another round of showers/thunderstorms are likely
across the main island of Puerto Rico tomorrow, primarily after
15Z. Outside of the convection, VFR conditions are expected
throughout the period.

&&

PREV DISCUSSION... /issued Issued by National Weather Service Miami FL/

SHORT TERM...Saturday through Monday

Partly to variably cloudy skies prevailed across Puerto Rico and
the US Virgin Islands during the overnight and early morning
hours. Overnight temperatures ranged from the upper 60s to mid 70s
across higher elevations with upper 70s to low 80s across lower
elevations. Winds were light and variable.

Although low level moisture is expected to erode somewhat during the
weekend under a weak mid to upper level ridge, still expect induced
showers and thunderstorms across  portions of Puerto Rico each
afternoon. The aforementioned activity is expected over central and
northwest Puerto Rico as well as portions of the San Juan Metro
Area. In addition, overnight passing showers across windward areas
cannot be ruled out. Soils are already saturated, therefore,. any
prolonged period of heavy rainfall may result in urban and stream
flooding.

LONG TERM...Tuesday through Sunday.

A broad mid to upper level trough is expected to prevail across the
central Atlantic and into the eastern Caribbean Monday through
Wednesday. This feature will allow deep tropical moisture to pool
across the forecast area.  As the trough aloft moves westward, a mid
to upper level ridge is then expected to build from the east.
Therefore, Monday through at least Wednesday under trofiness aloft
and plenty of tropical moisture, expect unsettled weather conditions
across the forecast area with periods of heavy rainfall. Soils are
already saturated and many of the rivers and small streams are
running above normal levels. Therefore, there is a high risk of
river and small stream flooding as well as mudslides in areas of
steep terrain early next week.

A more seasonal weather pattern is then expected by the end of the
workweek and into the weekend as a ridge pattern builds aloft.

MARINE...Light to gentle E/SE breeze will prevail on the south side
of the subtropical ridge located across the northern Atlantic.
Showers and thunderstorms will occur each day as deep tropical
moisture remains in place. North to northeast swells will continue
to enhance local seas on the Atlantic side of the islands through
Saturday night.

&&

.PRELIMINARY POINT TEMPS/POPS...
SJU  81  89  81  88 /  30  40  30  70
STT  82  85  82  84 /  30  30  30  50

&&

.SJU WATCHES/WARNINGS/ADVISORIES...
PR...None.
VI...None.
AM...None.
&&

SHORT TERM...99
LONG TERM....99
Hazardous weather outlook, Oct 7, 7:44 AM CDT, 6 hours 30 minutes before
Perspectivas sobre condiciones peligrosas del tiempo
Servicio Nacional de Meteorologia San Juan PR
Emitido por Servicio Nacional de Meteorologia Miami FL
816 AM AST sabado 7 de octubre de 2017

AMZ710>745-PRZ001>013-081230-
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 lejanas a la costa del Atlantico y Caribe-
816 AM AST sabado 7 de octubre de 2017

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

Aguaceros y tronadas con lluvias fuertes y vientos en rafagas breves
son posibles principalmente a traves del centro y oeste interior de
Puerto Rico esta tarde. Cualquier lluvia fuerte adicional podria
causar impactos adicionales de inundaciones repentinas.

Existe un riesgo moderado de corrientes marinas a lo largo de
la costa norte de Puerto Rico.

Oleaje de hasta 6 pies es posible sobre las aguas lejanas a la costa
del Atlantico al norte de PuertoRico. Operadores de embarcaciones
pequenas deben ejercer precaucion.

.Dias Dos a Siete...domingo a viernes

Aguaceros y tronadas son posibles cada dia con lluvias fuertes
localmente temprano la semana proxima, lo cual podria causar
impactos adicionales de inundaciones repentinas.

Es probable que un riesgo elevado de corrientes marinas continue
temprano la semana proxima a lo largo de la costa norte.

.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
o corrientes marinas al Servicio Nacional de Meteorologia en San
Juan.

AMZ715-725-VIZ001-002-081230-
San Tomas, San John e Islas Adyacentes-Santa Cruz-Aguas cercanas del
Atlantico y aguas costeras adyacentes del Caribe-
816 AM AST sabado 7 de octubre de 2017

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

Existe un riesgo moderado de corrientes marinas para la mayoria
de las playas de Santa Cruz hoy.

.Dias Dos a Siete...domingo a viernes

Es probable que un riesgo elevado de corrientes marinas continue
hasta el domingo para Santa Cruz.

.Comunicado sobre informacion reportada por observadores...

Activacion de observadores no sera necesaria.

In the hours before

Special weather statement, Oct 7, 12:55 PM CDT, 1 hour 19 minutes before
Special Weather Statement
National Weather Service San Juan PR
Issued by National Weather Service Miami FL
155 PM AST SAT OCT 7 2017

PRZ005-006-009-071845-
North Central-Central Interior-Western Interior-
155 PM AST SAT OCT 7 2017

...A STRONG THUNDERSTORM WILL AFFECT FLORIDA...MOROVIS...VEGA ALTA...
EASTERN ARECIBO...CENTRAL OROCOVIS...VEGA BAJA...BARCELONETA...
NORTHWESTERN BARRANQUITAS...NORTHERN JAYUYA...CIALES...WESTERN
COROZAL...EASTERN UTUADO AND MANATI MUNICIPALITIES...

At 155 PM AST, a strong thunderstorm was located over Ciales, moving
west at 25 mph.

Winds in excess of 40 mph are possible with this storm.

Locations impacted include...
Jayuya, Vega Alta, Ciales, Morovis, Florida, Manati, Vega Baja,
Barceloneta, Orocovis, Corozal, Miranda, Pajonal, La Alianza,
Barahona, Monserrate, Coto Norte, Franquez, Bajadero, Imbery and La
Luisa.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 1844 6632 1822 6633 1819 6667 1847 6669
TIME...MOT...LOC 1755Z 089DEG 23KT 1832 6649
Special weather statement, Oct 7, 12:57 PM CDT, 1 hour 17 minutes before
Special Weather Statement
National Weather Service San Juan PR
Issued by National Weather Service Miami FL
157 PM AST SAT OCT 7 2017

PRZ005-007>010-071845-
Northwest-North Central-Mayaguez and Vicinity-Western Interior-Ponce
and Vicinity-
157 PM AST SAT OCT 7 2017

...A STRONG THUNDERSTORM WILL AFFECT NORTH CENTRAL SABANA GRANDE...
LAS MARIAS...LARES...SAN SEBASTIAN...WESTERN ARECIBO...SOUTHEASTERN
ISABELA...ADJUNTAS...NORTHWESTERN YAUCO...QUEBRADILLAS...CAMUY...
MARICAO...NORTHEASTERN SAN GERMAN...HATILLO AND UTUADO
MUNICIPALITIES...

At 156 PM AST, a strong thunderstorm was located near Lares, moving
west at 15 mph.

Winds in excess of 40 mph are possible with this storm.

Locations impacted include...
Arecibo, Adjuntas, Quebradillas, Utuado, Lares, San Sebastian, Camuy,
Hatillo, Rafael Capo, Rafael Gonzalez, Bajadero, Maricao, Juncal,
Quebrada, Cayuco, Piedra Gorda, Cacao, Corcovado and Mora.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 1847 6668 1816 6666 1813 6701 1848 6703
TIME...MOT...LOC 1756Z 099DEG 12KT 1830 6683
Special weather statement, Oct 7, 1:45 PM CDT, 29 minutes before
Special Weather Statement
National Weather Service San Juan PR
Issued by National Weather Service Miami FL
245 PM AST SAT OCT 7 2017

PRZ008>010-071930-
Northwest-Mayaguez and Vicinity-Western Interior-
245 PM AST SAT OCT 7 2017

...A STRONG THUNDERSTORM WILL AFFECT LAS MARIAS...LARES...SAN
SEBASTIAN...SOUTHEASTERN ISABELA...NORTHWESTERN ADJUNTAS...MOCA...
QUEBRADILLAS...EASTERN ANASCO...CAMUY...NORTH CENTRAL MARICAO...
NORTHEASTERN MAYAGUEZ...WESTERN HATILLO...WEST CENTRAL UTUADO AND
EASTERN AGUADA MUNICIPALITIES...

At 245 PM AST, a strong thunderstorm was located over San Sebastian,
moving east at 5 mph.

Winds in excess of 40 mph are possible with this storm.

Locations impacted include...
Lares, Hatillo, San Sebastian, Camuy, Moca, Quebradillas, Hato
Arriba, Juncal, Quebrada, Piedra Gorda, Cacao and Espino.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 1850 6680 1820 6680 1819 6712 1839 6713
      1850 6683
TIME...MOT...LOC 1845Z 256DEG 6KT 1834 6695
Special weather statement, Oct 7, 1:48 PM CDT, 26 minutes before
Special Weather Statement
National Weather Service San Juan PR
Issued by National Weather Service Miami FL
248 PM AST SAT OCT 7 2017

PRZ005-006-008-009-071930-
Northwest-North Central-Central Interior-Western Interior-
248 PM AST SAT OCT 7 2017

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN VEGA BAJA...
FLORIDA...BARCELONETA...NORTHWESTERN MOROVIS...ARECIBO...NORTHEASTERN
JAYUYA...CIALES...NORTHWESTERN OROCOVIS...HATILLO...UTUADO...
NORTHWESTERN ADJUNTAS AND MANATI MUNICIPALITIES...

At 247 PM AST, a strong thunderstorm was located over La Alianza, or
near Florida. the storm is nearly stationary.

Winds in excess of 40 mph are possible with this storm.

Locations impacted include...
Arecibo, Ciales, Florida, Manati, Utuado, Barceloneta, Pajonal, La
Alianza, Coto Norte, Rafael Capo, Bajadero, Imbery, La Luisa, Rafael
Gonzalez, Barahona, Tiburones, Animas, Carrizales, Garrochales and
Sabana Hoyos.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 1848 6648 1849 6643 1826 6646 1820 6681
      1850 6681 1849 6671 1851 6661
TIME...MOT...LOC 1847Z 000DEG 0KT 1841 6664
Special weather statement, Oct 7, 1:56 PM CDT, 18 minutes before
Comunicado Especial sobre las Condiciones del Tiempo
Servicio Nacional de Meteorologia San Juan PR
157 PM AST sabado 7 de octubre de 2017

PRZ005-007>010-071845-
Noroeste-Norte Central-Mayaguez y Vecindad-Oeste Interior-Ponce
y Vecindad-
157 PM AST sabado 7 de octubre de 2017

...UNA TRONADA FUERTE AFECTARA LOS SIGUIENTES MUNICIPIOS DE PUERTO
RICO...SABANA GRANDE...LAS MARIAS...LARES...SAN SEBASTIAN...
ARECIBO...ISABELA...ADJUNTAS...YAUCO...QUEBRADILLAS...CAMUY...
MARICAO...SAN GERMAN...HATILLO Y UTUADO...

A las 1:56 PM AST, una fuerte tronada estaba localizada sobre Lares,
moviendose hacia el oeste a 15 mph.

Vientos en rafagas de 40 mph son posibles con esta tronada.

Lugares que seran afectados incluyen... Arecibo, Adjuntas,
Quebradillas, Utuado, Lares, San Sebastian, Camuy, Hatillo, Rafael
Capo, Rafael Gonzalez, Bajadero, Maricao, Juncal, Quebrada, Cayuco,
Piedra Gorda, Cacao, Corcovado y Mora.

Lluvias torrenciales tambien estan ocurriendo con estas tormentas, y
podrian causar inundaciones localizdas. No intente conducir su
vehiculo a traves de carreteras inundadas.

Rayos frecuentes de nube a suelo estan ocurriendo con esta tormenta.
Los rayos pueden afectar a 10 millas de distancia de la tronada.
Busque refugio seguro dentro de un vehiculo o edificio.
Local storm report, Oct 7, 2:08 PM CDT, 6 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN JUAN PR
308 PM AST SAT OCT 07 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0305 PM     FLASH FLOOD      UTUADO                  18.27N 66.71W
10/07/2017                   UTUADO             PR   EMERGENCY MNGR

            FLASH FLOODING AND MUDSLIDES REPORTED IN UTUADO, 10
            HOUSES AFFECTED IN URB SAN JOSE AND THE UTUADO HOSPITAL
            IS CURRENTLY FLOODED. ALSO, ROAD 10 FROM UTUADO TO

            ADJUNTAS WAS IMPACTED BY MUDSLIDE AND ROAD IS IMPASSABLE.

&&

DSANCHEZ

The office that day

Everything else NWS JSJ issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 6, 8:10 PM CDTAreal Flood WarningJSJ3 hr
Oct 7, 11:42 AM CDTSpecial Weather StatementJSJ48 min
Oct 7, 12:10 PM CDTSpecial Weather StatementJSJ50 min
Oct 7, 12:32 PM CDTSpecial Weather StatementJSJ28 min
Oct 7, 12:55 PM CDTSpecial Weather StatementJSJ50 min
Oct 7, 12:57 PM CDTSpecial Weather StatementJSJ48 min
Oct 7, 1:34 PM CDTAreal Flood AdvisoryJSJ3 hr
Oct 7, 1:45 PM CDTSpecial Weather StatementJSJ45 min
Oct 7, 1:48 PM CDTSpecial Weather StatementJSJ42 min
Oct 7, 2:13 PM CDTAreal Flood AdvisoryJSJ6 hr
Oct 7, 2:20 PM CDTAreal Flood AdvisoryJSJ3 hr
Oct 7, 2:59 PM CDTFlash Flood WarningJSJ3 hr
Oct 7, 5:16 PM CDTAreal Flood AdvisoryJSJ3 hr

Nearby

Flash Flood Warnings in Puerto Rico, 2017Every flash flood warning in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.