The islands remained under a moist and unstable weather pattern during the last week of the month. This pattern was supported by light to moderate winds blowing from the south-southeast and a moisture surge moving over the area.
Every event with a place to put it. Tap one for its entry below.
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.
The islands remained under a moist and unstable weather pattern during the last week of the month. This pattern was supported by light to moderate winds blowing from the south-southeast and a moisture surge moving over the area. This pattern enhanced afternoon convection (showers and t-storms), with various reports received on April 27 and 28.
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 Apr 27, 3:15 AM AST, 11 hours 5 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service San Juan PR 315 AM AST Mon Apr 27 2026 ...New SHORT TERM, LONG TERM, AVIATION, MARINE, BEACH FORECAST... .KEY MESSAGES... Updated at 304 AM AST Mon Apr 27 2026 * A gradual increase in moisture is expected today, enhancing the potential for showers and isolated thunderstorms across Puerto Rico and the U.S. Virgin Islands through at least midweek, with increased flooding and lightning risk. * A warming trend is likely across the islands, particularly at urban and coastal sites, with above-normal temperatures through the weekend. Heat indices are expected to reach or exceed 100°F, affecting the more vulnerable communities. * A moderate risk of rip currents will persist along north-and east-facing beaches of Puerto Rico and the U.S. Virgin Islands as pulses of a small northeasterly continues to reach the region. Rip currents are possible and can be life-threatening. Please exercise caution along exposed beaches. && .Short Term(Today through Wednesday)... Issued at 304 AM AST Mon Apr 27 2026 A calm and quiet night prevailed across Puerto Rico and the U.S. Virgin Islands, with only a few passing showers over the Atlantic and Caribbean waters. Overnight temperatures remained slightly warm across the region, ranging from the mid-70s to low 80s across urban and coastal areas. In higher elevations, temperatures stayed in the mid 60s to low 70s. Winds remained light and variable at 5 knots or less. Starting this morning, a gradual increase in low-level moisture is expected to transition the region into a much wetter pattern through at least midweek. Recent precipitable water analysis suggests above- normal moisture arriving from the Caribbean Sea and northern South America, with values reaching 2.0 to 2.2 inches through Wednesday. As this deepening moisture interacts with a mid- to upper-level trough lingering over the region, it will promote atmospheric instability. At the surface, high pressure will maintain light south- southeasterly winds. This pattern will support frequent showers and isolated thunderstorms, particularly during the afternoon hours over the interior and northern portions of Puerto Rico. Due to the light winds, shower activity will move slowly and expand in coverage, persisting over the region for longer durations. Consequently, the risk of flooding will be elevated from today through midweek, especially during the afternoon and evening. Periods of heavy rainfall, lightning, and ponding on roadways are likely, with localized flooding developing where rain persists. Additionally, a limited heat risk continues each day due to the combination of above-normal temperatures, southeasterly flow, and increasing humidity. In areas where rain has yet to develop, a warming trend is expected, driven by the southerly wind flow and above-normal sea surface temperatures across the regional waters. && .Long Term(Thursday through Monday)... Issued at 304 AM AST Mon Apr 27 2026 As mentioned in previous discussions, a moist and unstable weather pattern will persist from Thursday through Friday across Puerto Rico and the U.S. Virgin Islands, accompanied by light to moderate south- southeasterly winds. This southerly flow will promote warm temperatures and elevated humidity. Residents and visitors are encouraged to monitor the forecast, stay well hydrated, take frequent breaks from the heat, and limit prolonged sun exposure, particularly during the warmest hours of the day. From Thursday through Friday, moisture levels will remain above normal for this time of year, supporting a pattern of daily showers and isolated thunderstorms. The most active convection is expected to develop during the afternoon across the interior and northern portions of Puerto Rico, while morning activity will favor southern and eastern Puerto Rico as well as the U.S. Virgin Islands. A gradual drying trend will begin on Saturday, leading to improving conditions through the weekend. The driest period is expected from Sunday into Monday, when more stable conditions take hold across the region. Although afternoon showers may still develop, their coverage and intensity will decrease. By this time, any shower activity should be brief and limited. Warm conditions will persist throughout the period due to the prevailing south-southeasterly flow. Temperatures at the 925 mb level will remain above normal through Friday before gradually easing over the weekend. Maximum surface temperatures will range from the upper 80s to low 90s across coastal and urban areas, and from the low to mid 80s in higher elevations. Combined with high humidity, heat indices are expected to exceed 100 degrees Fahrenheit daily, especially through Friday with slight moderation by late weekend. && .AVIATION... (06Z TAFS) Issued at 304 AM AST Mon Apr 27 2026 Mainly VFR conds expected. Light/variable to calm winds early in the morning, becoming SSE btw 8-10 kt after 27/14Z. Later in the afternoon hours, SHRA/TSRA may develop over interior/western PR and affect TJSJ/TJBQ btw 27/17-23Z, causing brief MVFR/IFR conds. VCSH are possible over eastern PR/USVI after 27/23Z. Winds decrease again to light/variable during the overnight hrs. && .MARINE... Issued at 304 AM AST Mon Apr 27 2026 A surface high-pressure system over the central Atlantic will continue to weaken, while a surface low strengthens over the northwestern Atlantic over the next few days. This weakening pressure gradient will promote light to gentle southeasterly winds through at least midweek, becoming more easterly by the latter part of the week. Pulses of small, long-period northeasterly swell will continue to spread across the Atlantic waters and local passages over the next few days. The likelihood of showers and thunderstorms will also increase through at least midweek. && .BEACH FORECAST... Issued at 304 AM AST Mon Apr 27 2026 Today, there is a moderate risk of rip currents along the north- facing beaches of Puerto Rico, Culebra, St. Croix, St. Thomas, and St. John, as a small northeast swell spreads across the Atlantic waters, increasing the potential for life-threatening rip currents. A moderate risk means that life-threatening rip currents are possible in the surf zone. Beachgoers should exercise caution, particularly in those exposed areas. This moderate risk is expected to persist through most of the week, while beaches along the southern coastlines remain at a low risk of rip currents. Keep an eye out for quick changes in the weather conditions with afternoon thunderstorms across portions of Puerto Rico and the U.S. Virgin Islands, which could bring strong, gusty winds and lightning. Seek shelter immediately if you hear thunder. For additional information and location-specific rip current details, visit: weather.gov/beach/sju. && .SJU WATCHES/WARNINGS/ADVISORIES... PR...None. VI...None. AM...None. && SHORT TERM...GRS LONG TERM...MMC MARINE/BEACH FORECAST...YZR
The San Juan radar (TJUA), 35 km away, was scanning. The volume nearest the first event began at 18:20 UTC.
7 debris flow, 3 flash flood, 1 funnel cloud. Local standard time, as filed.
Water from a small creek was overflowing into a rural road in sector Rabo del Buey, near road PR-165 and before Camino Kilometro 9.8.
County officials posted on social media, and emergency managers then confirmed, two |landslides on PR-7780 between kilometers 3.1 and 3.5 in Barrio Dona Elena, Comeri o. The road was impassable. Based on radar estimates, between 1.5 to 2.5 inches of rain had fallen in that area at the time of the report.
A member of the public shared video on social media showing municipal employees clearing the landslide from both lanes of Road 164 in front of Xtra Colmado Cintron in Naranjito. Radar estimates indicated approximately 4 to 5 inches of rain had fell in the area, affecting traffic in both directions.
County officials reported on social media a landslide due to recent rainfall in PR-466 in Barrio Bajuras, Isabela. Based on radar estimates, around 2 to almost 4 inches of rain fell in that area at the time of the report.
A landslide was reported in PR-155 towards Morovis. The roadway was impassable due to the mud and debris, with a large tree down blocking both lanes. Estimated rainfall of 2 to 3 inches occurred around the time of the event.
A funnel was seen towards the waters from PR 3 km 47.8 in Fajardo near the Mobil Gas Station. It was also seen from Ceiba.
Broadcast media reported on social media that Higuera creek between Barrio Palomas and Barrio Dona Elena is out of its banks. Based on radar estimates between 3 to 4.5 inches of rain had fallen at the time of the report.
County officials reported on social media that a few landslides occurred along PR-779 in Barrio Palomas, Comerio, with water flowing down the road. Based on radar estimates, up to 4.5 inches of rain had fallen in that area at the time of the report.
Emergency managers reported flooding impacting a house. It is uncommunicated due to a nearby landslide in PR-780 km 4.8 in Barrio Dona Elena, Comerio.
A landslide was reported at PR-780 near El Rejon del Gallo, affecting the roadway. The roadway was not reported as impassable.
County officials reported on social media a landslide due to recent rainfall in PR-749 kilometer 2.3 in Barrio Quebrada Grande, Barranquitas. The road was impassable.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Puerto Rico in 2026Every state in 2026This day in weather historyWarnings in Puerto Rico, April 2026
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: 1331112, 1331212, 1331218, 1331217, 1331219, 1331111, 1331210, 1331220, 1331211, 1331223, 1331221.