Relative cool air advecting over warm waters favored the development of scattered showers over North Central 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.
Relative cool air advecting over warm waters favored the development of scattered showers over North Central 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 9, 4:20 AM AST, 55 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
420 AM AST MON DEC 9 2013
.SYNOPSIS...MID-LEVEL CUTOFF WILL CONTINUE TO RETROGRESS INTO THE
WRN CARIB BY TUE WHILE UPPER LEVEL LOW MEANDERS NEAR PR WHILE
SLOWLY FILLING. UPPER LEVEL RIDGE WILL BUILD OVR PR TOWARD THE END
OF THE WEEK.
&&
.DISCUSSION...MID-LEVEL CUTOFF LOW NORTH OF COLOMBIA WILL CONTINUE
TO MOVE WWD TODAY AND FARTHER AWAY FROM THE LOCAL AREA TAKING
DEEP MOISTURE WITH IT WITH SHARP DRYING EXPECTED AFTER 12Z TODAY.
SFC WINDS WILL DIMINISH A FEW KNOTS TODAY BUT STILL REMAIN WINDY.
WINDS DIMINISH FURTHER TUE THROUGH FRI AS BERMUDA HIGH SHIFTS
FARTHER EAST.
ON WED...ANOTHER BATCH OF DEEP MOISTURE IS FCST TO DEVELOP OVR THE
USVI AND PR WITH ANOTHER ROUND OF HEAVY SHOWERS AND THUNDERSTORMS.
THINGS FINALLY FRY OUT NEXT WEEKEND AS UPPER LEVEL CUTOFF LOW FILLS
AND UPPER LEVEL RIDGE BUILDS OVER THE NORTHEAST CARIBBEAN. ANOTHER
STRONG HIGH PRES SYSTEM WILL EXIT THE MID ATLC COAST FRI NIGHT
WITH TRADE WINDS STRENGTHENING ONCE AGAIN WITH WINDY CONDITIONS
EXPECTED SAT SIMILAR TO THIS PAST WEEKEND. THIS NEW HIGH WILL
MOVE RATHER QUICKLY ACROSS THE ATLC WITH WINDS DIMINISHING SUN.
&&
.AVIATION...VFR XCP ISOLD MVFR IN SHRA/TSRA EARLY THIS MRNG BUT
ACTIVITY WL DECR BY DAYBREAK. ISOLD/SCT SHRA THIS AFT THRU TUE.
WIND FL010-FL150 E 20-35 KT THRU AT LEAST TUE AFT. LLWS MAY BCM
POSBL IF WIND ALOFT DECOUPLES FM SFC...BUT SO FAR WINDS ARE GUSTY
TO SFC.
&&
.MARINE...STILL VERY ROUGH SEAS TODAY DUE TO STRONG WINDS. SEAS
IMPROVE QUICKLY TUE THROUGH FRI AS WINDS DIMINISH. ANOTHER STRONG
HIGH PRES WILL BUILD ACROSS THE ATLC SAT WITH 20-25 KT WINDS
LIKELY AND SEAS BUILDING AGAIN TO 7-9 FT. HIGH SURF WILL LIKELY BE
ALLOWED TO EXPIRE LATER TODAY.
&&
.PRELIMINARY POINT TEMPS/POPS...
SJU 86 80 84 80 / 20 30 40 50
STT 86 80 87 80 / 30 30 40 40
&&
.SJU WATCHES/WARNINGS/ADVISORIES...
PR...HIGH SURF ADVISORY UNTIL 6 AM AST EARLY THIS MORNING FOR CULEBRA-
NORTH CENTRAL-NORTHEAST-NORTHWEST-SAN JUAN AND VICINITY-
SOUTHEAST-VIEQUES-WESTERN INTERIOR.
VI...HIGH SURF ADVISORY UNTIL 6 AM AST EARLY THIS MORNING FOR ST
CROIX-ST. THOMAS/ST. JOHN/ADJACENT ISLANDS.
COASTAL WATERS...
SMALL CRAFT ADVISORY UNTIL 3 PM AST THIS AFTERNOON FOR COASTAL
WATERS OF SOUTHERN PUERTO RICO OUT 10 NM.
SMALL CRAFT ADVISORY UNTIL MIDNIGHT AST TUESDAY NIGHT FOR
ANEGADA PASSAGE SOUTHWARD TO 17N-ATLC WATERS OF PUERTO RICO
AND USVI FROM 10NM TO 19.5N-CARIBBEAN WATERS OF PUERTO RICO
FROM 10 NM TO 17N-COASTAL WATERS OF NORTHERN PUERTO RICO
OUT 10 NM-COASTAL WATERS OF NORTHERN USVI AND CULEBRA OUT
10 NM-COASTAL WATERS OF NORTHWESTERN PUERTO RICO OUT 10 NM-
COASTAL WATERS OF SOUTHERN USVI VIEQUES AND EASTERN PUERTO
RICO OUT 10 NM-MONA PASSAGE SOUTHWARD TO 17N.
&&
54/64The national radar mosaic for the moment the first event began.
1 flood, 1 heavy rain. Local standard time, as filed.
Small Creek flooding along el Rio Cibuco affecting the roads 620 and 647.
A mudslide was reported at road PR-2 near Virgencita sector in Dorado.
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: 488055, 488177.