A mid to upper level trough in combination with a moist and unstable air mass, produced scattered to numerous showers with thunderstorms over the North Central section of Puerto Rico.
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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 mid to upper level trough in combination with a moist and unstable air mass, produced scattered to numerous showers with thunderstorms over the North Central 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 Dec 1, 2:47 PM AST, 5 hours 13 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN JUAN PR 247 PM AST SUN DEC 1 2013 .SYNOPSIS...AT UPPER LEVELS...A BROAD UPPER LEVEL TROUGH WILL PASS THROUGH THE AREA TONIGHT LEAVING US IN THE LEFT ENTRANCE OF A 70 KNOT TROPICAL JET TONIGHT AND MONDAY. A WEAK TROUGH WILL PASS WEDNESDAY FOLLOWED BY A SHARPENING TROUGH ON THURSDAY. TROUGHINESS WILL BECOME ALMOST EAST-WEST ACROSS THE AREA AS IT LEANS OVER DURING THE WEEKEND. AT MID LEVELS...A WEAK TROUGH OVER THE LESSER ANTILLES WILL MOVE EAST AND WEAKEN. ON TUESDAY HIGH PRESSURE WILL BUILD OVER THE CARIBBEAN AS WESTERLIES PREVAIL OVER THE ATLANTIC WATERS TO THE NORTH. THEN STRONG HIGH PRESSURE WILL BUILD OVER WESTERN CUBA AS A TROUGH DIGS SOUTHWEST OVER THE LOCAL AREA THURSDAY. THIS HIGH PRESSURE WILL GRADUALLY MOVE EAST TO NORTH OF PUERTO RICO AND THE U.S. VIRGIN ISLANDS. EXCEPT FOR THIS THURSDAY AND FRIDAY CONDITIONS AT MID LEVELS WILL BE MOSTLY DRY UNTIL THE FOLLOWING MONDAY. AT LOWER LEVELS...WEAK HIGH PRESSURE WILL RIDGE SOUTH INTO THE TROPICAL ATLANTIC AS LOW PRESSURE FORMS IN THE WESTERN ATLANTIC MONDAY AND TUESDAY CAUSING SOUTHEAST FLOW. EARLY WEDNESDAY HIGH PRESSURE WILL FORM IN THE WESTERN ATLANTIC BEHIND THE LOW AND BUILD EAST ACROSS THE ATLANTIC JUST ABOVE 30 DEGREES NORTH LATITUDE...INCREASING THE LOCAL TRADE WINDS AS IT DOES SO. THE HIGH PRESSURE WILL CONTINUE IN THE CENTRAL ATLANTIC THROUGH THE MIDDLE OF NEXT WEEK. && .DISCUSSION...LIGHT SURFACE WINDS FROM THE EAST ALLOWED SEA BREEZES TO DEVELOP OVER PUERTO RICO AND THE U.S. VIRGIN ISLANDS TODAY WHILE SHOWERS FORMED OVER THE CARIBBEAN WATERS AND MOVED OVER VIEQUES AND CULEBRA AND THUNDERSTORMS HOVERED OVER THE WATERS JUST NORTH OF OUR FORECAST AREA. THUNDERSTORMS WERE FORMING OVER NORTHWEST INTERIOR PUERTO RICO AT ISSUANCE TIME. AS HIGH PRESSURE BUILDS SOUTH INTO THE TROPICAL ATLANTIC...FLOW JUST ABOVE THE SURFACE WILL REMAIN SOUTHEAST TO SOUTH UNTIL WEDNESDAY. THIS WILL BE A FAIRLY MOIST FLOW THAT WILL KEEP SCATTERED SHOWERS IN THE FORECAST FOR MOST OF PUERTO RICO AND THE U.S. VIRGIN ISLANDS. AMOUNTS ARE EXPECTED TO BE MODEST OWING TO THE LACK OF STRONG FORCING MECHANISMS ALTHOUGH SOME THUNDERSTORMS SHOULD BE EXPECTED. AFTER WEDNESDAY...HIGH PRESSURE BUILDS ACROSS THE ATLANTIC JUST NORTH OF 30 DEGREES NORTH AND WILL INCREASE THE TRADE WIND FLOW ACROSS THE AREA. MOISTURE THEN REMAINS SHALLOW. NEVERTHELESS RELATIVE HUMIDITIES AT 925 MB REMAIN IN THE LOW 90S AND PASSING SHOWERS MUST BE EXPECTED ON THE WINDWARD COASTS WITH SOME AFTERNOON CONVECTION PROBABLE IN THE INTERIOR VALLEYS ON THE OPPOSITE SIDE INTO THE BEGINNING OF NEXT WEEK. && .AVIATION...VFR XCP IFR/MVFR IN SOME SCT SHRA/TSRA THRU EARLY EVE. THEN SCT IFR/MVFR IN SHRA/TSRA E-ESE PR AND USVI OVERNITE INTO MON. WINDS SFC-FL100 ESE 10-15 KT BCMG SE 5-12 KT ON MON AND S MON NITE. AREAS OF MTN OBSCURATIONS THRU THE PD. && .MARINE...SEAS ARE EXPECTED TO CONTINUE TO SUBSIDE SLOWLY THROUGH WEDNESDAY. WINDS WILL INCREASE OVER THE AREA AS HIGH PRESSURE BUILDS TO THE NORTH LATER IN THE WEEK AND SEAS WILL THEN INCREASE. SEAS WILL BE CHOPPY WITH GENERALLY SHORT PERIODS THEN. SMALL CRAFT ADVISORIES WILL LIKELY BE NECESSARY IN THE OUTER ATLANTIC WATERS THE FOLLOWING WEEKEND. IN THE MEANTIME...SMALL CRAFT SHOULD EXERCISE CAUTION IN THE ATLANTIC WATERS AND NORTHERN PORTIONS OF THE CARIBBEAN PASSAGES TONIGHT. && .PRELIMINARY POINT TEMPS/POPS... SJU 73 84 74 85 / 40 40 30 30 STT 74 85 76 85 / 60 40 30 30 && .SJU WATCHES/WARNINGS/ADVISORIES... PR...NONE. VI...NONE. COASTAL WATERS...NONE. && 54/12
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN JUAN PR 553 AM AST SUN DEC 1 2013 AMZ710>745-PRZ001>013-021000- 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- 553 AM AST SUN DEC 1 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PUERTO RICO AND THE ADJACENT ATLANTIC COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT UNSTABLE ATMOSPHERIC CONDITIONS COMBINED WITH MOIST SOUTHEASTERLY FLOW WILL CONTINUE TO BRING PERIODS OF MODERATE TO LOCALLY HEAVY SHOWERS AND A FEW THUNDERSTORMS OVER THE LOCAL ISLANDS TODAY. DUE TO ALREADY SATURATED SOILS...ANY ADDITIONAL RAINFALL WILL LIKELY RESULT IN SHARP RISES IN SMALL STREAMS AND CREEKS AS WELL AS URBAN FLOODING IN PORTIONS OF PUERTO RICO...CULEBRA AND VIEQUES. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY NO HAZARDOUS WEATHER IS EXPECTED. .SPOTTER INFORMATION STATEMENT...FLOODING REPORTS WOULD BE APPRECIATED. AMZ715-725-VIZ001-002-021000- ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX- NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS- 553 AM AST SUN DEC 1 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE U.S. VIRGIN ISLANDS AND THE ADJACENT COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT UNSTABLE ATMOSPHERIC CONDITIONS COMBINED WITH MOIST SOUTHEASTERLY FLOW WILL CONTINUE TO BRING PERIODS OF MODERATE TO LOCALLY HEAVY SHOWERS AND A FEW THUNDERSTORMS OVER THE LOCAL ISLANDS TODAY. DUE TO ALREADY SATURATED SOILS...ANY ADDITIONAL RAINFALL WILL LIKELY RESULT IN SHARP RISES IN SMALL STREAMS AND CREEKS AS WELL AS URBAN FLOODING IN PORTIONS OF PUERTO RICO...CULEBRA AND VIEQUES. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY NO HAZARDOUS WEATHER IS EXPECTED. .SPOTTER INFORMATION STATEMENT...FLOODING REPORTS WOULD BE APPRECIATED.
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Road PR-620 was reported flooded in low lying areas at Barrio Fatima.
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, December 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: 487152.