Deep tropical moisture combined with daytime heating and an upper level trough to produced scattered to numerous showers with thunderstorms. Very heavy rain fell over the western interior section of Puerto Rico, which led to several roads closed and several creeks and rivers out of its banks.
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.
Deep tropical moisture combined with daytime heating and an upper level trough to produced scattered to numerous showers with thunderstorms. Very heavy rain fell over the western interior section of Puerto Rico, which led to several roads closed and several creeks and rivers out of its banks.
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 6, 2:56 PM AST, 1 hour 31 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN JUAN PR 256 PM AST MON MAY 6 2013 .SYNOPSIS...AT UPPER LEVELS...RIDGING CONTINUES OVER THE SOUTHEASTERN CARIBBEAN AND EXTENDS NORTHWARD THROUGH LATE WEEK. DURING THE WEEKEND SEVERAL SHORT WAVE TROUGHS MOVE THROUGH THE ATLANTIC WATERS...FIRST NORTH OF THE AREA AND THEN THROUGH THE AREA. WEAK RIDGING RETURNS EARLY NEXT WEEK. AT MID LEVELS...HIGH PRESSURE DOMINATES THE CARIBBEAN...ESPECIALLY THE SOUTHERN CARIBBEAN UNTIL LATE IN THE WEEK. A SERIES OF TROUGHS MOVE THROUGH THE AREA LATE FRIDAY THROUGH MONDAY. MOISTURE IS WEAK UNTIL TUESDAY AND WANES WEDNESDAY NIGHT. BUT SMALL MODEL DIFFERENCES COULD MAKE THE REST OF THIS WEEK WET AS GOOD MOISTURE REMAINS JUST NORTH OF THE AREA. AT LOWER LEVELS...SOUTHERLY FLOW PERSISTS WITH WEAK GRADIENTS UNTIL HIGH PRESSURE FORMS IN THE WEST CENTRAL ATLANTIC AND GRADUALLY STRENGTHENS TO THE NORTHEAST. LOW LEVEL MOISTURE IS BEST TUESDAY THROUGH THURSDAY. AFTER THIS MOISTURE DIMINISHES AND THE HIGH BUILDS INTO A LARGE AND STRONG HIGH PRESSURE THAT WILL MAINTAIN MODERATE TO FRESH EASTERLIES ACROSS THE AREA. SCATTERED SHOWERS PERSIST IN THIS LATTER REGIME ACROSS THE LOCAL AREA. && .DISCUSSION...MODERATE SEA BREEZES SET UP DURING THE EARLY MID MORNING HOURS AND SHOWERS FORMED FROM HORMIGUEROS TO LUQUILLO. THESE INTENSIFIED DURING THE EARLY AFTERNOON AND BEGAN MOVING TOWARD THE NORTHEAST WHERE THEY ARE EXPECTED TO ENGULF MOST OF THE AREA ALONG THE NORTH AND NORTHEAST COASTAL PLAINS WITH AT LEAST SOME RAINFALL BEFORE SUNSET. AMOUNTS BETWEEN 1 AND ONE AND ONE HALF INCHES FELL BETWEEN 11 AM AND 2:30 PM BETWEEN NARANJITO AND FAJARDO. SHOWERS WILL DISSIPATE AFTER SUNSET. ACCORDING TO THE GFS MODEL MOISTURE INCREASES ON TUESDAY BUT DIMINISHES RAPIDLY ON WEDNESDAY AND RETURNS ON THURSDAY. THE DRIEST DAY APPEARS TO BE ON THE FOLLOWING MONDAY OR TUESDAY. EXPECT THAT RAINFALL ACROSS THE AREA WILL CONFORM TO THESE FLUCTUATIONS IN MOISTURE BUT ALSO WILL BE GREATLY AFFECTED BY THE RETURN TO EASTERLIES ON TUESDAY NIGHT AND WEDNESDAY. THE BAND OF MOISTURE THAT BACKS THROUGH FROM THE SOUTH ON TUESDAY IS DEPICTED AS RETURNING FROM THE NORTHEAST ON THURSDAY AND THESE SHOULD BE THE BEST DAYS FOR SHOWERS. NEVERTHELESS...STRONG HEATING DURING DRIER DAYS COULD RESULT IN SOME INTENSE THUNDERSTORMS DURING DAYS IN WHICH MOISTURE IS LESS AND SUNSHINE LASTS LONGER. AS WINDS BECOME NEARLY EAST...SHOWERS WILL BECOME STRONGER IN THE WEST... UNLIKE TODAY...AND THE NORTH COAST WILL BE MOSTLY DRY. EASTERN INTERIOR SECTIONS ARE STILL LIKELY TO HAVE SOME SHOWERS DURING THE AFTERNOONS ON THE WETTEST DAYS. && .AVIATION...TJSJ...TJNR AND TKPK TAF SITES AND ROUTES BETWEEN THEM WILL HAVE MVFR CIGS AND MVFR/IFR VSBYS AND MTN OBSCURATIONS IN TSRA TILL ABOUT 06/23Z. OTHERWISE EXPECT VFR CONDS THRU 07/15Z. AFT 07/15Z SHRA/TSRA WILL REFORM OVER CENTRAL PUERTO RICO AND MOVE NORTHWEST. && .MARINE...SEAS ARE RELATIVELY TRANQUIL AT THIS TIME...BUT SWELL FROM THE NORTH NORTHEAST WILL INCREASE TODAY AND TOMORROW. WIND WAVES ARE GENERALLY FROM THE EAST SOUTHEAST AT THE MOMENT AND ARE FAIRLY GENTLE. THEREFORE THEY WILL NOT AFFECT MARITIME OPERATIONS MUCH BEFORE WEDNESDAY. && .PRELIMINARY POINT TEMPS/POPS... SJU 75 88 77 87 / 10 30 10 30 STT 78 85 76 87 / 20 30 10 20 && .SJU WATCHES/WARNINGS/ADVISORIES... PR...NONE. VI...NONE. COASTAL WATERS...NONE. && 54/12
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN JUAN PR 602 AM AST MON MAY 6 2013 AMZ710>745-PRZ001>013-071015- 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- 602 AM AST MON MAY 6 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 AT THIS TIME. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. AMZ715-725-VIZ001-002-071015- ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX- NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS- 602 AM AST MON MAY 6 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 AT THIS TIME. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
The national radar mosaic for the moment the first event began.
4 flash flood, 4 heavy rain, 3 flood, 1 thunderstorm wind. Local standard time, as filed.
Road PR-620 was reported flooded and closed due to Mavilla river out of its banks.
Numerous streets were reported flooded in the city of Ponce.
Heavy rainfall led to urban flooding in Palo Incado sector near road PR-720.
Road PR-125 was closed due to flash flooding.
Mudslide was reported at road PR-411.
Road PR-412 in Rincon was closed due to a tree falling on to the road.
Mudslide reported affecting road PR-156 in Orocovis.
Rio Cibuco in Vega Alta was over its banks which affected roads PR-620, PR-647, PR-675, and PR-690 ans Road PR-2.
Rio Grande De Manati flooded road PR-145.
Mudslide reported affected PR-111 Km 1.5.
A total of 5.01 inches recorded in downtown San Sebatian.
Rio Culebrinas was reported out of its banks flooding road PR-110.
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: 450615, 450616, 450617, 450679, 450680, 450686, 450712, 451207, 456724, 456730, 456732, 456733.