A surface trough combined with strong daytime heating and sea breeze convergence to produced scattered to numerous showers with thunderstorms over the San Juan metropolitan 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.
A surface trough combined with strong daytime heating and sea breeze convergence to produced scattered to numerous showers with thunderstorms over the San Juan metropolitan area.
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 Sep 14, 10:28 AM AST, 32 minutes earlier.
AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE SAN JUAN PR 1028 AM AST SAT SEP 14 2013 .SYNOPSIS...TUTT LOW OVR THE CNTRL CARIB WILL LIFT SLOWLY NORTHEAST OVR THE NEXT 36 HRS WHILE WEAKENING. MID-UPPER LEVEL RIDGE WILL OVER THE REGION NEXT WEEK. && .DISCUSSION...LAYERED PW PRODUCT AND 12Z JSJ RAOB SHOW PLENTY OF LOW LEVEL MOISTURE OVER PR THAT IS MAINLY CONFINED BELOW 700 MB. GOES SOUNDER DATA CONFIRMS THIS SHOWING VERY DRY AIR IN THE 700-300 MB LAYER OVR THE VIRGIN ISLANDS AND LEEWARD ISLANDS. CURRENT SATELLITE TRENDS SUGGEST THIS MID-LEVEL DRY AIR WILL NOT MAKE IN TIME TO LIMIT/SUPPRESS CONVECTION SO EXPECT A VERY ACTIVE AFTERNOON FROM AREAS WEST OF VEGA BAJA WWD TO MOCA. AREA WILL ALSO BE LOCATED UNDER UPPER LEVEL DIVERGENCE ALOFT AHEAD OF A 200 MB LOW/TUTT OVR THE CNTRL CARIB. STORM MOTION WILL ALSO BE SLOW WHICH SHOULD FAVOR HIGH RAINFALL AMOUNTS. ACTIVITY SHOULD TAPER OFF RAPIDLY TOWARD SUNSET SUE TO ADVECTION OF DRY AIR. && .AVIATION...VCTS AT JBQ AND JMZ WITH MVFR CIGS. VFR AT ALL OTHER SITES. && .MARINE...SEAS 2-4 FT AND WINDS 10-15 KT. TSTMS MOVING OFF OF NORTHERN PR LATER THIS AFTERNOON. && .PRELIMINARY POINT TEMPS/POPS... SJU 88 79 89 79 / 30 30 30 20 STT 88 79 89 80 / 30 30 30 30 && .SJU WATCHES/WARNINGS/ADVISORIES... PR...NONE. VI...NONE. COASTAL WATERS...NONE. && 64/64
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN JUAN PR 518 AM AST SAT SEP 14 2013 AMZ710>745-PRZ001>013-150930- 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- 518 AM AST SAT SEP 14 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PUERTO RICO AND THE ADJACENT ATLANTIC COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT AVAILABLE MOISTURE WILL COMBINE WITH LOCAL AND DIURNAL EFFECTS THIS AFTERNOON TO PRODUCE ISOLATED THUNDERSTORMS ACROSS PARTS OF THE INTERIOR AND NORTH TO NORTHWEST SECTIONS OF PUERTO RICO. THIS MAY LEAD TO PERIODS OF LOCALLY HEAVY RAINFALL AND MINOR URBAN AND SMALL STREAM FLOODING. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... INFORMATION ABOUT HEAVY RAINFALL AMOUNTS AND STRONG GUSTY WINDS WILL BE APPRECIATED. AMZ715-725-VIZ001-002-150930- ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX- NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS- 518 AM AST SAT SEP 14 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...SUNDAY THROUGH FRIDAY 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.
6 flood. Local standard time, as filed.
El Nuevo Dia local newspaper reported urban flooding along Road PR-3 along barrio Colon.
The Police Department reported flooding along the Roberto Clemente Avenue.
The Police Department reported urban flooding along the Rd. 887 at San Anton.
Social Network reported urban flooding at the Luis Mu oz Marin International Airport.
Social Media Network reported urban flooding along the Baldiorioty de Castro avenue and minilla Tunnel.
El Nuevo Dia local newspaper reported that road PR-848 at Trujillo Alto was flooded by poor drainage.
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, September 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: 478666, 478669, 478670, 478671, 478672, 478673.