Alert archive / Puerto Rico / Flash Flood Warnings in 2022

Flash Flood Warning 84, NWS JSJ

November 5, 2022

NWS JSJ issued this flash flood warning at Nov 5, 2022, 4:58 PM CDT. It was in force for 4 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Nov 5, 2022, 4:58 PM CDT (21:58 UTC)
Expired: Nov 5, 2022, 9:00 PM CDT
In force: 4 hr
Issued by: NWS JSJ
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

The radar

The San Juan radar (TJUA), 36 km from the middle of the area, began a volume at 21:58 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Nov 5, 4:58 PM CDT	FLOOD	1 E Coamo, PR	FLOODING WAS REPORTED NEAR A HOUSE IN CALLE SANTIAGO TORRES.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 3 storm reports to this flash flood warning; the first came 62 minutes after it went out.

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.

098 
WGCA52 TJSJ 052158
FFWSJU
PRC043-149-060200-
/O.NEW.TJSJ.FF.W.0084.221105T2158Z-221106T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Juan PR
558 PM AST Sat Nov 5 2022

The National Weather Service in San Juan has issued a

* Flash Flood Warning for...
  Coamo County in Puerto Rico...
  Villalba County in Puerto Rico...

* Until 1000 PM AST.

* At 558 PM AST, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 inches of rain 
  have fallen. Additional rainfall amounts up to 2 inches are 
  possible in the warned area. Flash flooding is ongoing or expected 
  to begin shortly.

  HAZARD...Life threatening flash flooding. Thunderstorms
           producing flash flooding. Mudslides are possible in
           areas of steep terrain.

  SOURCE...Radar.

  IMPACT...Life threatening flash flooding of creeks and streams,
           urban areas, highways, streets and underpasses.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

&&

LAT...LON 1816 6641 1817 6637 1817 6633 1815 6631
      1813 6632 1808 6626 1805 6631 1802 6633
      1804 6636 1804 6643 1808 6643 1808 6644
      1808 6646 1810 6650 1808 6651 1808 6652
      1811 6653 1814 6653 1816 6650 1818 6647

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

DSR

1 follow-up statement

631 
WGCA72 TJSJ 060153 RRA
FFSSJU

Flash Flood Statement
National Weather Service San Juan PR
953 PM AST Sat Nov 5 2022

PRC043-149-060203-
/O.EXP.TJSJ.FF.W.0084.000000T0000Z-221106T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Coamo PR-Villalba PR-
953 PM AST Sat Nov 5 2022

...FLASH FLOOD WARNING WILL EXPIRE AT 10 PM AST THIS EVENING FOR 
COAMO AND VILLALBA COUNTIES...

Flood waters have receded. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

A Flood Watch remains in effect until 600 PM AST Monday for portions 
of Puerto Rico.

LAT...LON 1816 6641 1817 6637 1817 6633 1815 6631
      1813 6632 1808 6626 1805 6631 1802 6633
      1804 6636 1804 6643 1808 6643 1808 6644
      1808 6646 1810 6650 1808 6651 1808 6652
      1811 6653 1814 6653 1816 6650 1818 6647

$$

DS

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 Nov 5, 3:35 PM CDT, 1 hour 23 minutes earlier.

Area forecast discussion, Nov 5, 3:35 PM CDT, 1 hour 23 minutes before

Area Forecast Discussion
National Weather Service San Juan PR
435 PM AST Sat Nov 5 2022

.SYNOPSIS...
A Flash Flood Watch remains in effect as a strong trough continues
to pull moisture from the south. The risk of flooding, mudslides
and river rises will remain enhanced through early in the
workweek. Conditions could gradually improve early in the
workweek, although with enough moisture for locally generated
showers each day.

&&

.SHORT TERM...Tonight through Monday...
The forecast is still on track. A mid to upper level trough
remains centered north of Hispaniola. At the surface, moisture is
being pulled from the Caribbean Sea into the islands. This has
resulted in widespread shower activity covering all of Puerto Rico
and the United States Virgin Islands. The activity is expected to
continue tonight and early tomorrow, so the risk for flooding,
mudslides and overflowing rivers will remain high. By Sunday and
Monday, a surface low pressure is expected to develop north of the
islands, and so far, the GFS show the bulk of the moisture just
east of the Virgin Islands. However, the surface winds will
continue from the south, dragging showers and thunderstorms over
the area, especially the USVI and the southern municipalities of
Puerto Rico. Although the amount of rain on Sunday and Monday are
not expected to be as much, the soils are very saturated, and any
additional rain may lead to more flooding and mudslides. Please
stay tuned to any further updates on the forecast.

&&

.LONG TERM...Tuesday through Saturday.../from prev discussion/

A wet pattern is likely to continue on Tuesday as the possible
non-tropical system near the Bahamian Islands maintains a moist,
southerly flow across the islands. This system is being monitored
by the National Hurricane Center and poses no direct impacts to
Puerto Rico and the USVI. If the current GFS model guidance holds
true, southerly winds will prevail for Tuesday and Wednesday which
could provide a good amount of rainfall, especially across the
northern half of Puerto Rico. Model guidance shows the wind flow
quickly backing on Thursday, maintaining an easterly flow for the
rest of the week. During this time moisture values stay above
climatological averages. This would return a typical pattern
across the islands with the greatest rainfall across the
interior/western sections of Puerto Rico. Atmospheric stability
does appear to improve throughout the week as no upper level
feature will be present, however, precipitable water values are
likely to spike again by Saturday as a tropical wave passing
south of the islands.

The development of this non-tropical low will reveal what is to
be expected during the long term period. However, it appears that
a wet pattern will continue across previously saturated areas,
which elevates the risk of flash flooding and ponding of water
across urban areas.

&&

.AVIATION...
Unstable weather continues, affecting aerodromes and airspace
between. SHRA/TSRA persist, with RA and +RA. Periods of deteriorated
conditions expected, to IFR or maybe worse. Terrain obscuration
likely. Gradual improvement betw 06/00Z and 06/06Z, then greater
improvement thereafter. Winds generally SE  at 10 to 15 knots, but
stronger, gustier winds near SHRA/TSRA, where winds may be VRB.
Winds after sunrise tomorrow around 8 to 12 knots out of the S/SE.

&&

.MARINE...
Increasing winds and an arriving northerly swell are expected to
maintain seas hazardous through the weekend, up to 8 feet.
Unsettled weather conditions will continue as well, with periods
of showers and thunderstorms. Seas could become especially
hazardous around thunderstorms. The risk of rip currents will also
increase to high, today for southern Puerto Rico, and tomorrow for
northern Puerto Rico and Culebra.

&&

.SJU WATCHES/WARNINGS/ADVISORIES...
PR...Flash Flood Watch through Monday afternoon for PRZ001>013.

     High Rip Current Risk from Sunday morning through Monday
     afternoon for PRZ001-002-008-012.

     High Rip Current Risk through late tonight for PRZ003-007-011.

     High Rip Current Risk through Monday afternoon for PRZ005.

VI...Flash Flood Watch through Monday afternoon for VIZ001-002.

&&

SHORT TERM...DS
LONG TERM....ERG
PUBLIC...GRS

Hazardous weather outlook, Nov 5, 5:38 AM CDT, 11 hours 20 minutes before

Perspectivas sobre las Condiciones Peligrosas del Tiempo
Servicio Nacional de Meteorologia en San Juan PR
547 AM AST sabado 5 de noviembre de 2022

AMZ710>745-PRZ001>013-061000-
San Juan y Vecindad-Noreste-Sureste-Este Interior-Norte Central-Interior
Central-Ponce y Vecindad-Noroeste-Oeste Interior-Mayaguez y Vecindad-Suroeste-
Culebra-Vieques-Las aguas costeras cercanas y lejanas a la costa del Atlantico
y del Caribe-
547 AM AST sabado 5 de noviembre de 2022

Esta perspectiva sobre las condiciones peligrosas del tiempo es para
Puerto Rico.

.DIA UNO...Hoy y esta noche

.Rayos...Tronada de dispersas a numerosas son posibles a traves de
Puerto Rico, especialmente a traves de sectores del sur y este. Este
atento para detener las actividades afuera y este preparado para
refugiarse.

.Lluvia Excesiva... Inundaciones repentinas amenazantes a la
vida, posiblemente entrando a estructuras en comunidades.

.Viento...Se esperan condiciones ventosas. Asegure los objetos que
no esten seguros pueden volar alrededor.

.Condiciones Maritimas...Se espera oleaje igual o mayor a 7 pies
a traves de las aguas locales. Se esperan condiciones peligrosas para
los operadores de pequenas embarcaciones.

.Corrientes Marinas...Existe el potencial de corrientes marinas
amenazantes a la vida son posibles en la zona de resaca
particularmente a traves del sur de Puerto Rico el dia de hoy, pero
tambien norte central de Puerto Rico esta noche.

.DIAS DOS A SIETE...domingo hasta viernes

Se espera un patron de tiempo activo continue temprano la semana proxima. Los
aguaceros y tronadas podrian producir inundaciones y por lo tanto la vigilancia
de inundaciones repentinas  continuara hasta el Lunes en la tarde. Un riesgo
alto de corrientes marinas continuara hasta el fin de semana.

.Comunicado sobre informacion reportada por observadores...

Se le recomienda a los observadores reportar. Por favor, brinde toda
la informacion relacionada a inundaciones al Servicio Nacional de
Meteorologia en San Juan.

AMZ715-725-VIZ001-002-061000-
San Tomas, San John e Islas Adyacentes-
Santa Cruz-Aguas cercanas del Atlantico y aguas costeras adyacentes
del Caribe-
547 AM AST sabado 5 de noviembre de 2022

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

.DIA UNO...Hoy y esta noche

.Rayos...Tronadas de dispersas a numerosas  son posibles a traves de
Puerto Rico especialmente las areas del sur y este. Este
atento para detener las actividades afuera y este preparado para
refugiarse.

.Lluvia Excesiva...Inundaciones en areas urbanas, carreteras,
pequenos riachuelos, y arrastres. Inundaciones repentinas aisladas
son posibles.

.Viento...Condiciones ventosas a traves de las aguas locales y las
islas locales. Objetos que no esten seguros pueden volar alrededor.

.Condiciones Maritimas...Un oleaje de 7 pies o mas a traves de las aguas
locales. Condiciones maritimas peligrosas para los operadores de embarcaciones
pequenas.

.Corrientes Marinas...Las corrientes marinas amenazantes a la vida
son posibles en la zona de resaca a traves de las aguas locales.

.DIAS DOS A SIETE...domingo hasta viernes

Se espera un patron de tiempo activo continue temprano la semana proxima. Los
aguaceros y tronadas podrian producir inundaciones y por lo tanto la vigilancia
de inundaciones repentinas  continuara hasta el Lunes en la tarde. Un riesgo
moderado de corrientes marinas continuara hasta el fin de semana.

.Comunicado sobre informacion reportada por observadores...

Se le recomienda a los observadores reportar. Por favor, brinde toda
la informacion relacionada a inundaciones al Servicio Nacional de
Meteorologia.

In the hours before

Local storm report, Nov 5, 4:48 PM CDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN JUAN PR
548 PM AST SAT NOV 5 2022

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

0547 PM     FLOOD            3 WSW COTO LAUREL       18.03N 66.59W
11/05/2022                   PONCE              PR   BROADCAST MEDIA

            A TV METEOROLOGIST SHARED PICTURES IN SOCIAL
            MEDIA OF ROAD PR-14 BEING CLOSED DUE TO
            FLOODING. THIS WAS NEAR LA RAMBLA AND
            HOSPITAL SAN LUCAS.

&&

ERG

Special weather statement, Nov 5, 4:49 PM CDT, 9 minutes before

Comunicado Especial sobre las Condiciones del Tiempo
Servicio Nacional de Meteorologia San Juan PR
544 PM AST sabado 5 de noviembre de 2022

...Tronadas fuertes impactaran sectores del sureste de Puerto Rico
hasta las 645 PM AST...

A las 543 PM AST, tronadas fuertes estaban sobre las aguas locales
del sureste de Puerto Rico, o justo al sur de Maunabo, moviendose al
noroeste a 30 mph.

PELIGROS...Vientos de hasta 40 mph y lluvias fuertes.

FUENTE...Radar.

IMPACTOS...Puede esperar danos menores a ramas de arboles y la
expulsion de objetos livianos y no bien amarrados. Lluvias fuertes
pueden causar acumulaciones en carreteras, especialmente en areas
de pobre drenaje.

MEDIDAS DE PRECAUCION/PREPARATIVOS...

Las personas que se encuentran en el exterior deben buscar refugio
inmediatamente. Los motoristas deben reducir la velocidad y estar
preparados para una posible perdida de control debido al hidroplaneo.

&&

TAMANO MAXIMO DE GRANIZO...0.00 PULGADAS
RAFAGA DE VIENTO MAXIMA...40 MPH

ERG/GRS

Local storm report, Nov 5, 4:50 PM CDT, 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN JUAN PR
550 PM AST SAT NOV 5 2022

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

0215 PM     DEBRIS FLOW      1 WSW TALLABOA ALTA     18.05N 66.72W
11/05/2022                   PENUELAS           PR   EMERGENCY MNGR

            EMERGENCY MANAGERS REPORTED A MUDSLIDE
            AROUND WALGREENS, ROAD PR-385.

&&

ERG

Local storm report, Nov 5, 4:53 PM CDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN JUAN PR
553 PM AST SAT NOV 5 2022

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

0500 PM     FLASH FLOOD      2 WNW CENTRAL AGUIRRE   17.97N 66.25W
11/05/2022                   SALINAS            PR   EMERGENCY MNGR

            EMERGENCY MANAGERS REPORTED THAT ROAD PR-3
            IS COMPLETELY IMPASSABLE DUE TO SEVERE
            FLOODING.

&&

ERG

Local storm report, Nov 5, 4:54 PM CDT, 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN JUAN PR
554 PM AST SAT NOV 5 2022

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

0500 PM     FLASH FLOOD      1 SSW VAZQUEZ           18.05N 66.24W
11/05/2022                   SALINAS            PR   EMERGENCY MNGR

            EMERGENCY MANAGERS REPORTED THAT ROAD PR-1
            IN SALINAS IS COMPLETELY IMPASSABLE DUE TO
            SIGNIFICANT FLOODING.

&&

ERG

Local storm report, Nov 5, 4:57 PM CDT, 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN JUAN PR
557 PM AST SAT NOV 5 2022

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

0553 PM     FLASH FLOOD      1 W JAUCA               17.96N 66.38W
11/05/2022                   SANTA ISABEL       PR   911 CALL CENTER

            REPORTS FROM 9-1-1 CALL CENTER INDICATE
            FLOODING IN CALLE 1 IN SANTA ISABEL. PEOPLE
            ARE TRAPPED IN THEIR HOUSES.

&&

ERG

The office that day

Everything else NWS JSJ issued on the same UTC day.

Issued	Product	Office	Lasted
Nov 4, 7:30 PM CDT	Areal Flood Advisory	JSJ	3 hr
Nov 5, 3:15 AM CDT	Rip Current Statement	JSJ	3 days
Nov 5, 7:25 AM CDT	Areal Flood Advisory	JSJ	3 hr
Nov 5, 8:12 AM CDT	Areal Flood Advisory	JSJ	9 hr
Nov 5, 8:21 AM CDT	Areal Flood Advisory	JSJ	6 hr
Nov 5, 11:02 AM CDT	Special Marine Warning	JSJ	58 min
Nov 5, 11:41 AM CDT	Areal Flood Advisory	JSJ	5 hr
Nov 5, 12:11 PM CDT	Special Marine Warning	JSJ	79 min
Nov 5, 12:29 PM CDT	Flash Flood Warning	JSJ	5 hr
Nov 5, 1:53 PM CDT	Flash Flood Warning	JSJ	7 hr
Nov 5, 2:20 PM CDT	Flash Flood Warning	JSJ	5 hr
Nov 5, 2:30 PM CDT	Special Weather Statement	JSJ	45 min
Nov 5, 2:46 PM CDT	Special Weather Statement	JSJ	59 min
Nov 5, 4:12 PM CDT	Flash Flood Warning Considerable damage threat	JSJ	5 hr
Nov 5, 4:30 PM CDT	Flash Flood Warning Considerable damage threat	JSJ	2 hr
Nov 5, 4:44 PM CDT	Special Marine Warning	JSJ	31 min
Nov 5, 4:44 PM CDT	Special Weather Statement	JSJ	61 min
Nov 5, 5:13 PM CDT	Special Marine Warning	JSJ	62 min
Nov 5, 5:28 PM CDT	Severe Thunderstorm Warning	JSJ	32 min
Nov 5, 5:44 PM CDT	Flash Flood Warning Considerable damage threat	JSJ	4 hr
Nov 5, 5:48 PM CDT	Areal Flood Advisory	JSJ	50 min
Nov 5, 5:53 PM CDT	Special Weather Statement	JSJ	22 min
Nov 5, 5:59 PM CDT	Flash Flood Warning Considerable damage threat	JSJ	6 hr
Nov 5, 6:01 PM CDT	Areal Flood Advisory	JSJ	4 hr
Nov 5, 6:06 PM CDT	Areal Flood Advisory	JSJ	3 hr
Nov 5, 6:15 PM CDT	Flash Flood Warning Considerable damage threat	JSJ	6 hr
Nov 5, 6:38 PM CDT	Flash Flood Warning Considerable damage threat	JSJ	7 hr
Nov 5, 6:56 PM CDT	Special Weather Statement	JSJ	34 min

Nearby

Flash Flood Warnings in Puerto Rico, 2022 Every flash flood warning in 2022

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; radar from the NEXRAD Level II archive.