Mid to upper level low north of Puerto Rico generated a large area of showers and thunderstorms that extended from the Caribbean waters northeast into the Atlantic. Some of this weather affected the southern part of Puerto Rico during the evening causing periods of heavy rain and gusty winds of 25 to 35 mph in Ponce City.
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.
Mid to upper level low north of Puerto Rico generated a large area of showers and thunderstorms that extended from the Caribbean waters northeast into the Atlantic. Some of this weather affected the southern part of Puerto Rico during the evening causing periods of heavy rain and gusty winds of 25 to 35 mph in Ponce City. Rainfall accumulations of 2 to 4 inches caused flooding of several roads and communities in Ponce. Emergency Management officials reported downed trees and power poles, and several areas without electric power.
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 Nov 11, 4:27 PM AST, 3 hours 3 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
427 PM AST WED NOV 11 2009
.SYNOPSIS...MID TO UPPER LEVEL LOW AND ASSOCIATED TROUGHINESS...
WILL CONTINUE TO AFFECT THE LOCAL AREA TONIGHT INTO EARLY
THURSDAY...BEFORE LIFTING OUT TO THE EAST NORTHEAST LATER THURSDAY
THROUGH FRIDAY. BRIEF SHORT WAVE RIDGING WILL TAKE PLACE ACROSS
THE LOCAL AREA LATER THURSDAY AND THURSDAY NIGHT INTO AT LEAST A
PART OF FRIDAY...BEFORE HEIGHTS BEGIN TO FALL AGAIN AHEAD OF NEXT
APPROACHING MID TO UPPER LEVEL TROUGH/LOW BEGINNING LATE FRIDAY
OR FRIDAY NIGHT AND THEN PROBABLY CONTINUING THROUGH MUCH OF THE
WEEKEND.
&&
.DISCUSSION...DEEPER MOISTURE WILL CONTINUE TO ADVECT SLOWLY
NORTHWEST ACROSS THE LOCAL AREA TONIGHT THROUGH EARLY THURSDAY
AND IS THEN STILL EXPECTED TO LINGER NEARBY (MOST LIKELY
NORTHWEST HALF OF FA) FOR LATER THURSDAY AND FRIDAY...WITH
APPROACHING COLD FRONT EXPECTED TO MOVE EAST SOUTHEAST TOWARD THE
LOCAL ISLANDS SATURDAY AND SUNDAY...PROBABLY PUSHING THIS
MOISTURE BACK ACROSS THE LOCAL ISLANDS (SIMILAR TO PRE-FRONTAL
TROUGH)...WITH COLD FRONTAL MOISTURE THEN OUTLOOKED ACROSS THE FA
FOR THE SUNDAY NIGHT/MONDAY TIME FRAME.
SO...FOR TONIGHT THROUGH EARLY THURSDAY...SURFACE TROUGH
EXTENDING ACROSS PUERTO RICO LATE THIS AFTERNOON...WILL CONTINUE
MOVING SLOWLY NORTHWEST ACROSS THE REMAINDER OF THE LOCAL AREA.
THIS FEATURE AND ITS ASSOCIATED DEEP MOISTURE WILL CONTINUE TO
INTERACT WITH GENERALLY FAVORABLE DYNAMICS AND LOCAL EFFECTS TO
PRODUCE A GOOD DEAL OF CLOUDINESS...SHOWERS AND A FEW
THUNDERSTORMS ACROSS THE LOCAL ISLANDS. ALTHOUGH RAINFALL HAS NOT
BEEN WIDESPREAD...SHOWERS AND STORMS THAT HAVE FORMED HAVE BEEN
INTENSE...WITH VERY HEAVY TO TORRENTIAL RAINFALL. ALTHOUGH OUR
FEELING TODAY AND INTO TONIGHT HAS BEEN THAT A SIGNIFICANT AND/OR
WIDESPREAD FLASH FLOOD EVENT IS NOT LIKELY...GIVEN WSR-88D AND
SATELLITE TRENDS...THIS STILL CANNOT BE COMPLETELY RULED OUT AND
CERTAINLY URBAN AND SMALL STREAM FLOODING WILL OCCUR IN SOME AREAS
TONIGHT...WITH THE POTENTIAL FOR AT LEAST SOME LOCALIZED FLASH OR
RIVER FLOODING. FOR THIS REASON...WE HAVE OPTED TO KEEP THE FLASH
FLOOD WATCH IN PLACE FOR NOW.
FOR LATER THURSDAY THROUGH SATURDAY...PERIODS OF UNSETTLED
WEATHER ARE STILL EXPECTED...AS MOISTURE LINGERS NEARBY AND
CONTINUES TO INTERACT WITH DIURNAL AND NOCTURNAL PROCESSES.
ALTHOUGH IT IS TOO EARLY TO BE SURE AT THIS TIME...SUNDAY THROUGH
MONDAY AND POSSIBLY TUESDAY...COULD BECOME ACTIVE AGAIN FOR AT
LEAST A TIME...AS COLD FRONTAL BOUNDARY MOVES INTO OR ACROSS THE
LOCAL ISLANDS. STAY TUNED.
A HIGH SURF ADVISORY REMAINS IN EFFECT FOR THE NORTHWEST THROUGH
NORTHEAST COASTS OF ALL OF THE LOCAL ISLANDS THROUGH 4 AM AST
THURSDAY.
&&
.AVIATION...EXPECT PREVAILING VFR CONDITIONS ACROSS MOST OF THE
LOCAL ISLANDS AND TAF SITES TONIGHT. HOWEVER...MVFR AND LOCALLY
IFR CONDITIONS...MOUNTAIN OBSCURATIONS AND LOCALLY STRONG SURFACE
WIND GUSTS WILL CONTINUE IN BANDS AND PATCHES OF SHOWERS AND
THUNDERSTORMS THROUGH AT LEAST 12/01Z. ANY VOLCANIC ASH AND STEAM
SHOULD MOVE NORTHWEST TO NORTH NORTHWEST AND COULD EVENTUALLY
BECOME AN ISSUE FOR TIST AND TISX.
&&
.MARINE...HAZARDOUS MARINE CONDITIONS WILL CONTINUE THROUGH LATER
TONIGHT OR EARLY THURSDAY...DEPENDING ON THE MARINE ZONE. LONG
PERIOD...NORTH NORTHEAST SWELLS HAVE PEAKED...BUT WILL CONTINUE TO
AFFECT THE ATLANTIC WATERS AND THE CARIBBEAN PASSAGES TONIGHT
THROUGH EARLY THURSDAY...WHILE SLOWLY SUBSIDING. A SMALL CRAFT
ADVISORY REMAINS IN EFFECT FOR MOST OF THE LOCAL ATLANTIC AND
CARIBBEAN WATERS AND THE CARIBBEAN PASSAGES.
&&
.PRELIMINARY POINT TEMPS/POPS...
SJU 75 88 76 88 / 50 50 30 30
STT 78 87 79 86 / 50 40 40 40
&&
.SJU WATCHES/WARNINGS/ADVISORIES...
PR...FLASH FLOOD WATCH UNTIL MIDNIGHT AST TONIGHT FOR CENTRAL
INTERIOR-CULEBRA-EASTERN INTERIOR-MAYAGUEZ AND VICINITY-
NORTH CENTRAL-NORTHEAST-NORTHWEST-PONCE AND VICINITY-SAN
JUAN AND VICINITY-SOUTHEAST-SOUTHWEST-VIEQUES-WESTERN
INTERIOR.
HIGH SURF ADVISORY UNTIL 4 AM AST THURSDAY FOR CULEBRA-MAYAGUEZ
AND VICINITY-NORTH CENTRAL-NORTHEAST-NORTHWEST-SAN JUAN AND
VICINITY-VIEQUES.
SMALL CRAFT ADVISORY AMZ710...712...715...722...725...732...
741 AND 742.
VI...FLASH FLOOD WATCH UNTIL MIDNIGHT AST TONIGHT FOR ST CROIX-ST.
THOMAS/ST. JOHN/ADJACENT ISLANDS.
HIGH SURF ADVISORY UNTIL 4 AM AST THURSDAY FOR ST CROIX-ST.
THOMAS/ST. JOHN/ADJACENT ISLANDS.
SMALL CRAFT ADVISORY AMZ710...715...722...725 AND 732.
&&HAZARDOUS WEATHER OUTLOOK FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS NATIONAL WEATHER SERVICE SAN JUAN PR 539 AM AST WED NOV 11 2009 AMZ710>745-PRZ001>013-120945- 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- 539 AM AST WED NOV 11 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PUERTO RICO AND THE ADJACENT COASTAL WATERS. .DAY ONE...TONIGHT A MID TO UPPER LEVEL LOW...JUST NORTH OF PUERTO RICO THIS MORNING IS PRODUCING A LARGE AREA OF CLOUDINESS EXTENDING FROM PUERTO RICO EASTWARD ACROSS THE NORTHERN LEEWARD ISLANDS AND ACROSS THE ATLANTIC FOR SEVERAL HUNDRED MILES. THE ABUNDANT MOISTURE AND INSTABILITY IN COMBINATION WITH THE AREA OF LOW PRESSURE...MAY PROVIDE FAVORABLE CONDITIONS FOR SIGNIFICANT CONVECTIVE DEVELOPMENT TODAY ACROSS PUERTO RICO INCLUDING VIEQUES AND CULEBRA. ADDITIONAL HEAVY RAINFALL IS POSSIBLE DURING THE AFTERNOON HOURS ACROSS THE CENTRAL INTERIOR AND WESTERN PUERTO RICO WITH THE ADDITION OF DAYTIME HEATING AND LOCAL TERRAIN EFFECTS. MUDSLIDES WILL BE LIKELY IN AREAS OF HEAVY RAINFALL AND STEEP TERRAIN. A FLASH FLOOD WATCH REMAINS IN EFFECT FOR ALL OF PUERTO RICO...VIEQUES AND CULEBRA THROUGH THIS EVENING. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY THE LINGERING MOISTURE ACROSS THE REGION WILL COMBINE WITH DAYTIME HEATING AND LOCAL TERRAIN EFFECTS TO INDUCE THE DEVELOPMENT OF SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS ACROSS WESTERN AND INTERIOR PUERTO RICO WEDNESDAY AND THURSDAY AFTERNOON. .SPOTTER INFORMATION STATEMENT... ANY HEAVY RAINFALL OR FLOODING REPORTS WOULD BE GREATLY APPRECIATED. AMZ715-725-VIZ001-002-120945- ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX- NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS- 539 AM AST WED NOV 11 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE U.S. VIRGIN ISLANDS AND THE ADJACENT COASTAL WATERS. .DAY ONE...TONIGHT A MID TO UPPER LEVEL LOW...JUST NORTH OF THE LOCAL ISLANDS THIS MORNING IS PRODUCING A LARGE AREA OF CLOUDINESS EXTENDING FROM PUERTO RICO EASTWARD ACROSS THE NORTHERN LEEWARD ISLANDS AND ACROSS THE ATLANTIC FOR SEVERAL HUNDRED MILES. THE ABUNDANT MOISTURE AND INSTABILITY IN COMBINATION WITH THE AREA OF LOW PRESSURE...MAY PROVIDE FAVORABLE CONDITIONS FOR SIGNIFICANT CONVECTIVE DEVELOPMENT TODAY ACROSS THE U.S. VIRGIN ISLANDS. A FLASH FLOOD WATCH REMAINS IN EFFECT FOR ALL OF THE U.S. VIRGIN ISLANDS THROUGH THIS EVENING. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY LINGERING MOISTURE WILL INDUCE THE DEVELOPMENT OF SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS ACROSS PARTS OF THE LOCAL ISLANDS WEDNESDAY AND THURSDAY. .SPOTTER INFORMATION STATEMENT... ANY HEAVY RAINFALL OR FLOODING REPORTS WOULD BE GREATLY APPRECIATED.
The San Juan radar (TJUA), 56 km away, was scanning. The volume nearest the first event began at 23:27 UTC.
1 flash flood. Local standard time, as filed.
The following sectors in Ponce City reported flooding; La Rambla, Las Monjitas, Fagot Avenue, Road 14, Santiago Caballero Avenue, and the Flamboyan Condo.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Puerto Rico in 2009Every state in 2009This day in weather historyWarnings in Puerto Rico, November 2009
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 2026-09-30. Each event’s entry at NCEI: 203475.