Alert archive / Puerto Rico / Special Weather Statements in 2017

Special Weather Statement, NWS JSJ

October 7, 2017

NWS JSJ issued this special weather statement at Oct 7, 2017, 11:42 AM CDT. It was in force for 48 min. 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, 11:42 AM CDT (16:42 UTC)
Expired: Oct 7, 2017, 12:30 PM CDT
In force: 48 min
Issued by: NWS JSJ

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Oct 7, 6:57 AM CDT, 4 hours 45 minutes earlier.

Area forecast discussion, Oct 7, 6:57 AM CDT, 4 hours 45 minutes before

Area Forecast Discussion...UPDATED
National Weather Service San Juan PR
Issued by National Weather Service Miami FL
757 AM AST Sat Oct 7 2017

.AVIATION...
Satellite imagery indicates a few clouds across the forecast area
this morning with light and variable winds. Another round of
showers and thunderstorms is likely this afternoon across mainly
the main island of Puerto Rico. Generally VFR conditions will
prevail through the period, but brief MVFR or lower will be
possible in and around convection. Winds will be light to moderate
out of the E/SE this afternoon.

&&

.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  88  81  89  81 /  40  30  40  30
STT  85  82  85  82 /  30  30  30  30

&&

.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, 3 hours 58 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, 11:42 AM CDT, 0 minutes before

Special Weather Statement
National Weather Service San Juan PR
Issued by National Weather Service Miami FL
1242 PM AST SAT OCT 7 2017

PRZ007-009>011-071730-
Mayaguez and Vicinity-Western Interior-Southwest-Ponce and Vicinity-
1242 PM AST SAT OCT 7 2017

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN SABANA GRANDE...LAS
MARIAS...SOUTHERN ANASCO...SOUTHWESTERN LARES...NORTHWESTERN LAJAS...
CABO ROJO...MARICAO...MAYAGUEZ...SAN GERMAN...HORMIGUEROS AND
NORTHWESTERN YAUCO MUNICIPALITIES...

At 1241 PM AST, a strong thunderstorm was located near Sabana Grande,
moving west at 10 mph.

Winds in excess of 40 mph are possible with this storm in addition
to dangerous cloud to ground lightning.

Locations impacted include...
Cabo Rojo, Mayaguez, Sabana Grande, Hormigueros, San German, Lajas,
Puerto Real, Monte Grande, La Playa, Maricao, Palmarejo, Sabana
Eneas, Betances 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 1825 6691 1809 6690 1799 6722 1801 6720
      1803 6722 1805 6722 1817 6720 1821 6717
      1829 6723
TIME...MOT...LOC 1641Z 086DEG 10KT 1817 6697

The office that day

Everything else NWS JSJ issued on the same UTC day.

Issued	Product	Office	Lasted
Oct 6, 8:10 PM CDT	Areal Flood Warning	JSJ	3 hr
Oct 7, 12:10 PM CDT	Special Weather Statement	JSJ	50 min
Oct 7, 12:32 PM CDT	Special Weather Statement	JSJ	28 min
Oct 7, 12:55 PM CDT	Special Weather Statement	JSJ	50 min
Oct 7, 12:57 PM CDT	Special Weather Statement	JSJ	48 min
Oct 7, 1:34 PM CDT	Areal Flood Advisory	JSJ	3 hr
Oct 7, 1:45 PM CDT	Special Weather Statement	JSJ	45 min
Oct 7, 1:48 PM CDT	Special Weather Statement	JSJ	42 min
Oct 7, 2:13 PM CDT	Areal Flood Advisory	JSJ	6 hr
Oct 7, 2:14 PM CDT	Flash Flood Warning	JSJ	4 hr
Oct 7, 2:20 PM CDT	Areal Flood Advisory	JSJ	3 hr
Oct 7, 2:59 PM CDT	Flash Flood Warning	JSJ	3 hr
Oct 7, 5:16 PM CDT	Areal Flood Advisory	JSJ	3 hr

Nearby

Special Weather Statements in Puerto Rico, 2017 Every special weather statement 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.