An upper level trough combined with strong daytime heating and local effects producing scattered to numerous showers with isolated thunderstorms mainly across the San Juan Metropolitan area and over the Western Interior sections of Puerto Rico.
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.
An upper level trough combined with strong daytime heating and local effects producing scattered to numerous showers with isolated thunderstorms mainly across the San Juan Metropolitan area and over the Western Interior sections of Puerto Rico.
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 13, 3:08 PM AST, 22 minutes earlier.
AREA FORECAST DISCUSSION...CORRECTED NATIONAL WEATHER SERVICE SAN JUAN PR 308 PM AST MON MAY 13 2013 .SYNOPSIS...AN UPPER LEVEL TROUGH EXTENDING FROM THE LESSER ANTILLES EAST NORTHEAST ACROSS THE ATLANTIC IS EXPECTED TO MOVE SLOWLY EASTWARD AND AWAY FROM THE LOCAL ISLANDS...WHILE DISSIPATES TONIGHT. ANOTHER UPPER TROUGH WILL MOVE ACROSS THE WESTERN ATLANTIC BY TUESDAY...MOVING CLOSE TO REGION WEDNESDAY AND THURSDAY. THIS FEATURE WILL INDUCE AN INCREASE IN MOISTURE ACROSS THE REGION BY THE MIDDLE OF THE WEEK. && .DISCUSSION...LATEST SATELLITE IMAGES THIS AFTERNOON DEPICTED AN INCREASE IN CLOUDINESS...SHOWER AND THUNDERSTORM ACTIVITY MAINLY NORTH OF CORDILLERA CENTRAL. THIS ACTIVITY IS EXPECTED TO MOVE SLOWLY TO THE NORTH NORTHWEST...WHILE PREVAIL UNTIL THE EARLY EVENING HOURS. AN UPPER TROUGH JUST ACROSS THE LESSER ANTILLES THIS AFTERNOON...WILL MOVE EASTWARD AND AWAY FROM THE REGION TONIGHT AND TUESDAY. FOR TUESDAY THE WEATHER ACROSS THE REGION WILL BE DRIVEN BY THE INFLUENCE OF DIURNAL HEATING...SEA BREEZE CONVERGENCE AND LOCAL OROGRAPHIC EFFECTS. AN UPPER LEVEL TROUGH ACROSS NORTH AMERICA THIS AFTERNOON...IS EXPECTED TO MOVE EASTWARD ACROSS THE WESTERN ATLANTIC BY TUESDAY AND APPROACHING TO THE LOCAL ISLANDS BY MID WEEK. THIS FEATURE IS EXPECTED TO PROMOTE AN INCREASE IN MOISTURE...SHOWER AND THUNDERSTORM ACTIVITY ACROSS THE REGION. PWAT VALUES WILL INCREASE STEADILY FOR THE NEXT FEW DAYS...FROM AROUND 1.50 INCHES TODAY TO NEAR 1.90 INCHES BY WEDNESDAY AND THURSDAY. && .AVIATION...VFR CONDITIONS ARE EXPECTED TO PREVAIL ACROSS THE LOCAL FLYING AREA THROUGH THE FORECAST PERIOD. AFTERNOON SHRA/TSRA ARE EXPECTED TO CONTINUE OVER THE INTERIOR...NORTHERN AND NORTHWESTERN SECTIONS OF PR...AFFECTING MAINLY TJMZ...TJBQ AND TJSJ UNTIL AT LEAST 13/23Z. THEREFORE...MOUNTAIN OBSCURATIONS AND BRIEF PERIODS OF MVFR OR EVEN IFR CONDITIONS ARE POSSIBLE. AFTER 13/23Z AND THROUGH THE REST OF THE FORECAST PERIOD...MAINLY VFR CONDITIONS ARE EXPECTED TO PREVAIL ACROSS THE LOCAL FLYING AREA. && .MARINE...SEAS OF 4 FEET OR LESS AND WINDS OF 17 KNOTS OR LESS ARE EXPECTED TO CONTINUE THROUGH TONIGHT. && .PRELIMINARY POINT TEMPS/POPS... SJU 87 77 88 77 / 20 20 30 0 STT 86 77 87 77 / 20 20 20 20 && .SJU WATCHES/WARNINGS/ADVISORIES... PR...NONE. VI...NONE. COASTAL WATERS...NONE. && 71/72
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN JUAN PR 620 AM AST MON MAY 13 2013 AMZ710>745-PRZ001>013-141000- SAN JUAN AND VICINITY-NORTHEAST-SOUTHEAST-EASTERN INTERIOR- NORTH CENTRAL-CENTRAL INTERIOR-PONCE AND VICINITY-NORTHWEST- WESTERN INTERIOR-MAYAGUEZ AND VICINITY-SOUTHWEST-CULEBRA-VIEQUES- THE NEARSHORE AND OFF SHORE ATLANTIC AND CARIBBEAN COASTAL WATERS- 620 AM AST MON MAY 13 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PUERTO RICO AND THE ADJACENT ATLANTIC COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY AN UPPER LEVEL TROUGH OVER THE EASTERN UNITED STATES WILL REACH THE LOCAL AREA WEDNESDAY PROMOTING MOISTURE TRANSPORT AND MORE UNSTABLE CONDITIONS. SHOWERS AND THUNDERSTORMS APPEAR LIKELY OVER THE CORDILLERA. IN ADDITION...STEERING WINDS ARE EXPECTED TO COLLAPSE LEADING TO VERY SLOW STORM MOTION WHICH COULD RESULT IN VERY HEAVY RAINFALL. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY. AMZ715-725-VIZ001-002-141000- ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX- NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS- 620 AM AST MON MAY 13 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE U.S. VIRGIN ISLANDS AND THE ADJACENT COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY.
The national radar mosaic for the moment the first event began.
3 flood, 1 heavy rain. Local standard time, as filed.
Emergency Management Director reported urban flooding at Los Millones Avenue, Villa Contesa urbanization, Castiglioni Avenue and Country Estates urbanization.
Martinez Nadal Avenue near Summit Hills and Road PR-177 were reported flooded. Also, A car was stranded at Genova street in Villa Caparra sector with one person inside the car. The person was rescued.
PR-125, km 26.5 was reported flooded at Barrio Pozas.
A mudslide was reported at Road Pr-383 in Barrio Magas Arriba.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Puerto Rico in 2013Every state in 2013This day in weather historyWarnings in Puerto Rico, May 2013
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: 457007, 457008, 457010, 457013.