Strong daytime heating combined with sea breeze convergence to produced scattered showers with thunderstorms over the western interior section 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.
Strong daytime heating combined with sea breeze convergence to produced scattered showers with thunderstorms over the western interior section 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 Sep 26, 2:18 PM AST, 3 hours 7 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN JUAN PR 218 PM AST THU SEP 26 2013 .SYNOPSIS...UPPER LEVEL RIDGE DOMINATES THE FORECAST AREA...AND AN UPPER LEVEL LOW WILL CONTINUE TO MEANDER EAST OF LOCAL ISLANDS. SURFACE HIGH PRESSURE ACROSS THE CENTRAL ATLANTIC AND AN AREA OF LOW PRESSURE ACROSS THE WESTERN ATLANTIC WILL CONTINUE TO PROMOTE AN EAST SOUTHEAST WIND FLOW ACROSS THE LOCAL ISLANDS OVER THE NEXT SEVERAL DAYS. && .DISCUSSION...HOT CONDITIONS PREVAIL OF THE ISLANDS TODAY AS WIND DIRECTIONS CONTINUE TO BE FROM EAST SOUTHEAST. AT THIS MOMENT THE HIGH TEMPERATURE FOR THE LLM INTL AIRPORT WAS 94. CONDITIONS ARE FAVORABLE FOR HIGH TEMPERATURE TO REACH THE LOW 90'S THROUGH THE WEEKEND. ISOLATED SHOWERS DEVELOPED OVER THE NORTH CENTRAL PORTIONS OF PUERTO RICO.ISOLATED TO LOCALLY SCATTERED SHOWERS AFFECTED WESTERN PORTIONS OF PUERTO RICO FROM MOCA SOUTH TO MAYAGUEZ. AT THIS MOMENT THESE SHOWERS ARE GENERATING SIGNIFICANT RAINFALL ACCUMULATIONS AND MOST OF THEM WILL DISSIPATE AT AROUND SUNSET. TONIGHT...ISOLATED PASSING SHOWERS COULD MOVE ACROSS THE LOCAL WATERS AND AFFECT THE USVI AND EASTERN PORTIONS OF PUERTO RICO. ON FRIDAY...EXPECTED LIMITED SHOWER ACTIVITY DURING THE MORNING HOURS...WITH THE DEVELOPMENT OF SHOWERS WITH THUNDERSTORMS OVER THE WESTERN INTERIOR AND NORTHWEST SECTIONS OF PUERTO RICO. BETTER CHANCES FOR SHOWERS ACROSS THE LOCAL AREA...WILL BE SUNDAY... WHEN A TROPICAL WAVE WILL APPROACH THE LOCAL AREA FROM THE EAST. MODELS SHOWS BETTER MOISTURE ARRIVING SUNDAY AFTERNOON AND LAST THROUGH MONDAY. && .AVIATION...VFR CONDITIONS WILL PREVAIL ACROSS LOCAL TAF SITES FOR THE NEXT 24 HOURS. && .MARINE...TRANQUIL MARINE CONDITIONS WILL PREVAIL THROUGH TONIGHT BUT INCREASING WINDS WILL GENERATE A SLIGHT CHOP ACROSS THE LOCAL WATERS. EXPECT SEAS BETWEEN 2 TO 4 FEET IN THE NEXT 24 HOURS. && .PRELIMINARY POINT TEMPS/POPS... SJU 88 78 88 78 / 10 0 20 10 STT 89 80 89 80 / 10 10 20 20 && .SJU WATCHES/WARNINGS/ADVISORIES... PR...NONE. VI...NONE. COASTAL WATERS...NONE. && 09/10
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN JUAN PR 519 AM AST THU SEP 26 2013 AMZ710>745-PRZ001>013-270930- 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- 519 AM AST THU SEP 26 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...FRIDAY THROUGH WEDNESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. AMZ715-725-VIZ001-002-270930- ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX- NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS- 519 AM AST THU SEP 26 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...FRIDAY THROUGH WEDNESDAY 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.
1 flood. Local standard time, as filed.
Urban areas near road PR-119 were flooded due to Culebrinas River out of its banks.
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: 478870.