Afternoon convection on May 27th over northwestern Puerto Rico produced cloud-to-ground lightning over Isabela, injuring three individuals.
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The episode as NWS SJU wrote it up.
Afternoon convection on May 27th over northwestern Puerto Rico produced cloud-to-ground lightning over Isabela, injuring three individuals.
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 May 27, 3:52 PM AST, 28 minutes earlier.
Area Forecast Discussion National Weather Service San Juan PR 352 PM AST Mon May 27 2024 .SYNOPSIS... As the tropical wave continues to depart tonight, the east- southeasterly flow will continue to bring plenty of moisture into the islands enhancing unstable conditions until at least mid- week. A drier airmass is expected to filter into the region, promoting stable weather conditions and warm temperatures by the end of the workweek. && .SHORT TERM...Tonight through Wednesday... In the morning, showers filtered across the southeastern and southwestern municipalities of Puerto Rico, leaving less than an inch of rain, while the remaining parts of the islands experienced mostly calm weather conditions. By the early afternoon, showers and thunderstorms started to develop over the northwestern and interior sections of Puerto Rico as well as along the San Juan Metropolitan area. Overall, due to the tropical wave's proximity, mostly cloudy skies prevailed over Puerto Rico and the U.S. Virgin Islands throughout the day. Temperature-wise, they remained in the upper 80s to low 90s along the coastal and urban areas, while over the higher elevations, they stayed in the 80s. Despite the passage of the tropical wave some heat indices along the north central and western Puerto Rico ranged from 105 - 111 degrees Fahrenheit occasionally. The prevailing wind flow was out of the east- southeast. Tonight, expect the development of shower activity, particularly along the eastern half of Puerto Rico and the U.S. Virgin Islands, as patches of moisture associated with the tropical wave that is now to the southwest of Puerto Rico filter inland. With this rainfall, we also foresee some thunderstorm activity. Overnight, the temperatures should remain in the upper 70s to low 80s along the coast and in the 70s across the mountains. We anticipate that the tropical wave will continue to move away overnight. Despite the anticipated departure of the tropical wave, the deep east-southeasterly flow will continue to bring plenty of moisture into the islands through at least mid-week. The latest model guidance continues to suggest above-normal precipitable water values as well. The 500mb temperatures will range around -7 degrees Celsius, meaning that there is a potential for strong thunderstorms to develop mainly in the afternoons across the interior and western Puerto Rico through at least the end of the short-term period. Additional activity is also expected elsewhere at times. The risk of flooding will stay elevated these days. Also, breaks of sunshine will be more frequent tomorrow and Wednesday, allowing for temperatures and heat indices to climb up so that it will feel muggy, too. && .LONG TERM...Thursday through Monday... //from previous discussion// No significant changes have been introduced to the long term forecast. A mid-to-upper level ridge over the eastern Caribbean is forecast to persist for much of the period. A drier airmass is expected to filter into the region, promoting stable weather conditions and warm temperatures. The general wind flow will prevail from the southeast and will shift from the south by early Sunday in response to a building surface high pressure in the central Atlantic. Despite of the drier air, there is sufficient low- level moisture from the Caribbean Sea moving into the local area. This moisture in combination with daytime heating, and local effects will result in afternoon convective activity across the interior, north- central and northwestern portions of Puerto Rico every afternoon. With the expected activity, there is a limited to elevated risk of urban and small stream flooding in roads and poor drainage areas. Latest precipitable water model guidance suggest values between 1.80 to 2.00 inches between Friday and Sunday. By Friday through Monday a relatively wet pattern is expected to prevail across Puerto Rico and the U.S. Virgin Islands as a weak surface trough develop between the Dominican Republic and the local region. In response, an enhancement in shower and thunderstorm activity is anticipated as moisture increases. By Sunday, winds are expected to shift from the south and prevailing from this direction until at least mid- week. With this meteorological scenario, warmer temperatures are going to be present with values between the upper 80s to low 90s along the coastal and urban areas of the islands. Heat indices are anticipated to surpass the mid 100s, and could result in excessive heat conditions for the islands. && .AVIATION... (18z TAFs) SHRA/VCTS will result in gusty winds btwn 15-20kt, and will possibly affect TJBQ (thru 26/23z) and IST/ISX (thru 27/02z). Winds will prevail mainly from the E-ESE at 13 kt or less, pushing passing SHRA across JSJ overnight. Afternoon convection will develop tomorrow (28/16-22z) across PR's mountain areas and downwind from the USVI. Expect E winds at 10-15 kt with sea breeze variations and higher gusts near TSRA after 28/13z, tomorrow. && .MARINE... A moderate east to southeast wind flow will prevail across the region over the next few days. The next tropical wave will likely be approaching the area by mid-week. Currently, it is located in the central Atlantic along 39W and south of 11N. && .BEACH FORECAST... There is a low risk of rip currents across all beaches of Puerto Rico and the U.S. Virgin Islands tonight. Moderate to heavy showers and isolated thunderstorms are possible with the influence of a tropical wave just southwest of the region. && .SJU WATCHES/WARNINGS/ADVISORIES... PR...None. VI...None. AM...None. && SHORT TERM...MMC/RAM LONG TERM....GRS AVIATION...CAM PUBLIC DESK...ICP
Perspectiva sobre las Condiciones Peligrosas del Tiempo Servicio Nacional de Meteorología San Juan PR 406 AM AST lunes 27 de mayo de 2024 AMZ711>745-PRZ001>013-280815- San Juan y Vecindad-Noreste-Sureste-Este Interior- Norte Central-Central Interior-Ponce y Vecindad-Noroeste- Oeste Interior-Mayagüez y Vecindad-Suroeste-Culebra-Vieques- Las aguas cercanas y fuera de la costa del Atlántico y del Caribe- 406 AM AST lunes 27 de mayo de 2024 Esta perspectiva sobre las condiciones peligrosas del tiempo es para sectores de Puerto Rico. .DÍA UNO...Hoy y esta noche .Rayos...Tormentas eléctricas dispersas son posibles a través del noroeste de Puerto Rico, y aisladas en el resto del lugar.. Planee detener toda la actividad al aire libre y moverse a refugios. .Lluvia Excesiva...Inundaciones en áreas urbanas, carreteras y riachuelos pequeños. Inundaciones repentinas aisladas posibles. .Calor Excesivo...Índice de calor de 102-107 grados a través de áreas costeras y urbanas. Agotamiento por calor es posible con una exposición prolongada. .DÍAS DOS A SIETE...martes a domingo Los niveles de humedad permanecerán altos temprano esta semana a medida que una onda tropical cruza el área. Esto mantendrá condiciones meteorológicas inestables promoviendo un riesgo de inundaciones limitado a elevado todos los días. Las condiciones calientes y bochornosas persistirán durante la mayoría de los días de la semana. .COMUNICADO SOBRE INFORMACIÓN DE OBSERVADORES... Se les exhorta a los observadores a reportar. Favor de reportar cualquier información sobre inundaciones, vientos, olas y corrientes marinas al Servicio Nacional de Meteorología en San Juan. AMZ716-726-VIZ001-002-280815- San Thomas San John e islas adyacentes-Santa Cruz- Aguas cercanas a la costa del Atlántico y aguas costeras adyacentes del Caribe- 406 AM AST lunes 27 de mayo de 2024 Esta Perspectiva sobre las Condiciones Peligrosas del Tiempo es para sectores de las Islas Vírgenes Americanas. .DÍA UNO...Hoy y esta noche .Rayos...Tormentas eléctricas aisladas a dispersas posibles a través de las islas y aguas locales. Esté atento a las tormentas eléctricas en su área y esté preparado para buscar refugio. .Lluvia Excesiva...Inundaciones en áreas urbanas, carreteras y lavados. Inundaciones repentinas aisladas posibles. .Calor Excesivo...Índice de calor de 102-107 grados a través de las islas. Agotamiento por calor es posible con una exposición prolongada. .DÍAS DOS A SIETE...martes a domingo Los niveles de humedad permanecerán altos temprano esta semana a medida que una onda tropical cruza el área. Esto mantendrá condiciones meteorológicas inestables promoviendo un riesgo de inundaciones limitado a elevado todos los días. Las condiciones calientes y bochornosas persistirán durante la mayoría de los días de la semana .COMUNICADO SOBRE INFORMACIÓN DE OBSERVADORES... Se les exhorta a los observadores a reportar. Favor de reportar cualquier información sobre inundaciones, vientos, olas y corrientes marinas al Servicio Nacional de Meteorología en San Juan.
Special Weather Statement
National Weather Service San Juan PR
117 PM AST Mon May 27 2024
PRZ005-008>010-271830-
Northwest PR-North Central PR-Mayaguez and Vicinity PR-
Western Interior PR-
117 PM AST Mon May 27 2024
...A STRONG THUNDERSTORM WILL IMPACT MUNICIPALITIES OF NORTHWESTERN
PUERTO RICO THROUGH 230 PM AST...
At 116 PM AST, Doppler radar was tracking a cluster of strong
thunderstorms extending between Arecibo westward to Moca, moving
west at 15 mph.
HAZARD...Wind gusts up to 40 mph and pea size hail. Frequent
lightning.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Arecibo, Aguadilla, Aguada, Rincon, Moca, Anasco, Camuy,
Quebradillas, San Sebastian, Las Marias, Isabela, Mayaguez, Utuado,
Lares, Hatillo, La Playa, Aceitunas, Caban, Rafael Capo, and San
Antonio.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
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 6692 1849 6679 1847 6674 1850 6664
1848 6654 1823 6673 1819 6716 1828 6719
1830 6723 1835 6727 1837 6726 1842 6716
1849 6717 1851 6714 1852 6704
TIME...MOT...LOC 1716Z 101DEG 17KT 1836 6686
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
ICPComunicado Especial sobre las Condiciones del Tiempo Servicio Nacional de Meteorologa San Juan PR 117 PM AST lunes 27 de mayo de 2024 Noroeste PR-Norte Central PR-Mayagez y Vecindad PR- Oeste Interior PR- 117 PM AST lunes 27 de mayo de 2024 ...UNA TORMENTA ELCTRICA FUERTE IMPACTAR LOS MUNICIPIOS DEL NOROESTE DE PUERTO RICO HASTA LAS 230 PM AST... A las 116 PM AST, el radar Doppler estaba rastreando un grupo de tormentas elctricas fuertes que se extendan entre Arecibo hacia el oeste hasta Moca, movindose hacia el oeste a 15 mph. PELIGRO...Rfagas de viento de hasta 40 mph y granizo del tamao de un guisante. Rayos frecuentes. FUENTE...Indicado por radar. IMPACTO...Los vientos rfagas podran derribar ramas de rboles y mover objetos no asegurados. Daos menores de granizo a la vegetacin son posibles. MEDIDAS DE PRECAUCIN/PREPARACIN... Si est al aire libre, considere buscar refugio dentro de un edificio. La lluvia torrencial tambin est ocurriendo con esta tormenta y puede conducir a inundaciones localizadas. No conduzca su vehculo a travs de carreteras inundadas. Rayos frecuentes de nubes a suelo estn ocurriendo con esta tormenta. Los rayos pueden golpear a 10 millas de distancia de una tormenta elctrica. Busque un refugio seguro dentro de un edificio o vehculo. && TAMAO DE GRANIZO MXIMO...0.25 EN RFAGA DE VIENTO MXIMO...40 MPH ICP
Preliminary Local Storm Report
National Weather Service San Juan PR
251 PM AST Mon May 27 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0130 PM Funnel Cloud 2 N San Sebastian 18.37N 67.00W
05/27/2024 San Sebastian PR Public
A report from social media showed us that a
funnel cloud formed in Bo. Saltos,
particularly in Sector Tamarindos in the
municipality of San Sebastian. The observer
indicated that nothing was being lifted.
&&
MMCThe San Juan radar (TJUA), 113 km away, was scanning. The volume nearest the first event began at 20:18 UTC.
1 lightning. Local standard time, as filed.
A social media post indicated that a lightning strike affected 3 minors in Montones Beach in Isabela.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Puerto Rico in 2024Every state in 2024This day in weather historyWarnings in Puerto Rico, May 2024
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: 1188788.