This periods began with a departing wave, but still under the influence of the moisture field. At the same time, another weak tropical wave approaches from the east, resulting in enough low level moisture and convergence that, when combined with local effects, generated numerous afternoon showers and thunderstorms.
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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.
This periods began with a departing wave, but still under the influence of the moisture field. At the same time, another weak tropical wave approaches from the east, resulting in enough low level moisture and convergence that, when combined with local effects, generated numerous afternoon showers and thunderstorms.
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 Aug 27, 4:59 PM AST, 1 minute earlier.
Area Forecast Discussion National Weather Service San Juan PR 459 PM AST Sat Aug 27 2022 .SYNOPSIS... Day long passing showers with afternoon convective development in the form of streamers across eastern Puerto Rico and heavier thunderstorm activity in the interior/western regions of Puerto Rico is forecast for the next couple of days. Passing showers will continue to provide rainfall to the USVI. Monday's activity will be enhanced from a tropical wave passing through the region as it provides moisture. Localized flooding is possible across affected areas. Breezy easterly winds will continue to prevail for the next few days. A similar pattern will continue until next weekend when a system that is currently being monitored by the NHC will approach the local islands. Additional information about this system can be found in the NHC's Tropical Weather Outlook (TWOAT) product or in www.nhc.noaa.gov. && .SHORT TERM...Tonight to Monday... Recent ASCAT (Advanced Scatterometer) 25KM wind vector scan verified prevailing breezy easterly wind flow around 15 knots. Embedded in this flow is the advection of patchy moisture that will support passing showers throughout tonight, however activity will be limited as precipitable water values are in a declining trend as dry air with traces of Saharan Dust pass through the region. A typical day of weather is expected for tomorrow with passing windward showers and afternoon convection. With ESE winds prevailing in the low to mid level flow, central interior to northwestern Puerto Rico should see the heaviest activity. Mudslides are possible for areas that have experienced multiple days of rainfall and also flooding may occur. Streamer formation is also anticipated down stream of El Yunque and is expected to affect the San Juan Metro Area stretching to near Dorado. Minor flooding and the ponding of water may occur across affected areas. Moisture from a tropical wave will arrive to the local islands overnight Sunday. The combination of this moisture and slightly cooler 500 MB temperatures should result in an active day of weather with numerous passing showers and afternoon convective development. Continued ESE wind flow will favor thunderstorms over northwestern Puerto Rico and streamer development across the eastern region. The local waters will also experience a great increase of showers and thunderstorms during this day. Localized flooding is possible for affected areas. Lots of cirrus cloud debris is expected to blanket the skies during this time. && LONG TERM...Tuesday through Sunday... Issued 507 AM AST Sat Aug 27 2022 The long term forecast period will start off with most of the moisture related to the tropical wave exiting our region and making way for a drier air mass, with around normal precipitable water values, along with a Saharan Air Layer (SAL). This can limit shower activity. However, the typical weather pattern should remain, with passing showers mainly over the eastern forecast area and shower activity with isolated thunderstorms, during the afternoon hours over the interior and western municipalities of Puerto Rico due to diurnal heating and local effects. In the upper levels a TUTT will position itself over our forecast area on Thursday and Friday. This, along with patches of moisture entering the region, can serve to enhance the typical weather pattern and create an increased risk of thunderstorms and urban and small stream flooding. By late Friday and into the weekend, current model guidance shows moisture associated with a tropical wave affecting our region. The National Hurricane Center (NHC) is monitoring this tropical wave as it is currently producing disorganized showers and thunderstorms in the eastern tropical Atlantic. This system currently has a low formation chance, with a 10 percent chance through 48 hours and a 30 percent chance through 5 days. Additional information about this system can be found in the NHC's Tropical Weather Outlook (TWOAT) product or in www.nhc.noaa.gov. Weather conditions in the region will be tied to the development of this system, but it still has the potential to bring heavy rainfall. The GFS currently has an open wave affecting us while the ECMWF has tropical cyclone. Both the GFS and the ECMWF also have discrepancies with regards to timing and intensity and it is still to early to determine exact impacts, if any. We will continue to monitor the future development of this system throughout the coming days. Nevertheless, as we enter the month of September, peak hurricane season, we encourage everyone to review their emergency plans. && .AVIATION...VFR. SHRA/Isold TSRA ovr interior and western PR as well as the San Juan metro area til 27/22Z, Mtn top obscr due to aftn convection over east and west interior sections of PR. VCSH/ VCTS psbl at TJSJ/TJBQ and VCSH at remaining terminals til 27/22Z. SCT-BKn lyrs nr FL025...FL050. Sfc wnds fm E 12-15 kts with sea breeze variations and ocnly hir gusts...bcm light and variable aft 27/23Z. && .MARINE...Seas and breaking wave heights remain around 4 feet from wind wave energy as a high pressure system stretched across the Atlantic promotes mainly easterly winds around 15 knots across the local waters. This trend will maintain for the next several days. No swell is forecast to reach the local waters. Small craft should exercise caution this evening as winds have been sustaining above 15 knots, with greater gust, resulting in choppy seas. A moderate risk of rip currents is present for the northern facing coastline of Puerto Rico and the risk is low elsewhere across Puerto Rico and the US Virgin Islands. && .SJU WATCHES/WARNINGS/ADVISORIES... PR...None. VI...None. && SHORT TERM...DS LONG TERM....RC PUBLIC DESK...ICP
Perspectivas sobre las Condiciones Peligrosas del Tiempo Servicio Nacional de Meteorologia en San Juan PR 529 AM AST sabado 27 de agosto de 2022 AMZ710>745-PRZ001>013-281000- 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- 529 AM AST sabado 27 de agosto de 2022 Esta perspectiva sobre las condiciones peligrosas del tiempo es para Puerto Rico y las aguas costeras adyacentes. .Dia Uno...Hoy y esta noche .Rayos...Tronadas de aisladas son posibles a traves del centro a oeste de Puerto Rico, y tambien en areas aisladas del area metropolitana de San Juan. Este atento a las tronadas en su area y preparese para refugiarse. .Lluvia Excesiva...Inundaciones en areas urbanas, carreteras y pequenos riachuelos. Inundaciones aisladas repentinas son posibles. .Calor Excesivo...Indices de calor entre 102-107 grados a traves de algunas de las areas costeras. El agotamiento por calor es posible con una exposicion prolongada. .Viento...Viento de hasta 20 mph podria afectar las aguas costeras del Atlantico y algunos lugares costeros en el norte central de Puerto Rico. .Corrientes Marinas...Corrientes marinas amenazantes a la vida son posibles en las zonas costera del norte, este y sureste de Puerto Rico. .Dias dos hasta el siete...domingo a viernes Se espera un riesgo moderado de corrientes marinas este fin de semana hacia la proxima semana a traves de las playas locales. Se esperan tronadas durante la tarde cada dia mayormente sobre el interior y oeste de Puerto Rico, lo cual podria causar inundaciones urbanas y de riachuelos, Un riesgo leve de calor, debido a indices de calor cercanos y mas altos que 100 grados a traves de las areas urbanas y costeras, es posible cada dia entre las horas de tarde en la manana a temprano en la tarde. .Comunicado sobre informacion reportada por observadores... No sera necesaria la activacion de los observadores. AMZ715-725-VIZ001-002-281000- San Tomas, San John e Islas Adyacentes-Santa Cruz- Aguas cercanas del Atlantico y aguas costeras adyacentes del Caribe- 529 AM AST sabado 27 de agosto 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 .Lluvia Excesiva...Son posibles a acumulaciones de agua en carreteras y areas de pobre drenaje. .Corrientes marinas...Existe un riesgo moderado de corrientes marinas en el este de Santa Cruz. .Dias dos hasta el siete...domingo a viernes Se espera un riesgo moderado de corrientes marinas este fin de semana hacia la proxima semana para las playas al este de Santa Cruz. Seran posibles aguaceros y tronadas aisladas a veces en y alrededor de las islas, especialmente el lunes mientras que una onda tropical se acerca al area. .Comunicado sobre informacion reportada por observadores... No sera necesaria la activacion de los observadores.
The national radar mosaic for the moment the first event began.
6 flood. Local standard time, as filed.
Emergency Managers reported Road 411 impassable due to flooding, near Rio Culebra.
Emergency Managers reported St. padre Lesme, near Road 417, impassable due to flooding.
Emergency Managers reported a section of Ave. Nativo Alers closed due to flooding.
A report received by the public indicated flooding along Road 330, km 1.5, was nearly impassable due to flooding.
Emergency managers reported flooding near a house in Cuatro Calles, near Road 12 and Panaderia Rio.
Emergency managers reported flooding along Road 330 km. 2.9. They indicated two individuals trapped inside a house, but no flooding inside the house.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Puerto Rico in 2022Every state in 2022This day in weather historyWarnings in Puerto Rico, August 2022
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: 1045690, 1045691, 1045692, 1045694, 1045695, 1045693.