A couple of weak disturbances at mid to upper levels passed north and combined with available moisture to produce heavy afternoon and evening rains across the central interior.
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 couple of weak disturbances at mid to upper levels passed north and combined with available moisture to produce heavy afternoon and evening rains across the central interior.
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 Apr 9, 4:06 PM AST, 2 hours 21 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN JUAN PR 406 PM AST THU APR 9 2009 .DISCUSSION...LATEST SATELLITE IMAGES AND RADAR OBSERVATIONS THIS AFTERNOON INDICATED AN INCREASE IN CLOUDINESS AND SHOWERS ACTIVITY ACROSS THE INTERIOR AND WESTERN SECTIONS OF PUERTO RICO AND ALSO ACROSS THE WATERS BETWEEN PUERTO RICO AND THE U.S. VIRGIN ISLANDS. ELSEWHERE ACROSS THE LOCAL ISLANDS...STABLE AND DRY WEATHER CONDITIONS PREVAILED. AN INCREASE IN LOW LEVEL MOISTURE IS EXPECTED ACROSS THE FA THIS EVENING AND OVERNIGHT AS A WEAK SURFACE TROUGH...ACROSS THE NORTHERN WINDWARD AND SOUTHERN LEEWARD ISLANDS AND ACROSS THE EASTERN CARIBBEAN LATE THIS AFTERNOON...MOVES WESTWARD PASSING MAINLY SOUTH OF THE LOCAL ISLANDS. BOTH...THE NAM AND THE GFS MODELS SUGGEST THAT THIS FEATURE WILL ONLY INDUCE A VERY LIGHT INCREASE IN MOISTURE ACROSS THE REGION THIS EVENING AN OVERNIGHT. AFTER THE PASSAGE OF THE TROUGH...THE MID TO UPPER RIDGE WILL WEAKLY BUILD AGAIN ACROSS THE REGION FRIDAY/FRIDAY NIGHT... LIMITING THE SHOWERS ACTIVITY AGAIN ACROSS THE FA UNTIL AT LEAST SATURDAY. A WEAK FRONTAL BOUNDARY EXTENDING FROM THE NORTHEASTERN TIP OF HISPANIOLA NORTHEASTWARD ACROSS THE CENTRAL ATLANTIC LATE THIS AFTERNOON...WILL STALL AND DISSIPATES ACROSS THE NORTHERN ATLANTIC WATERS BY THE UPCOMING WEEKEND. THIS FEATURE WILL AID TO FLAT THE HIGH PRESSURE RIDGE ACROSS THE REGION. WITH AN EAST NORTHEAST LOW LEVEL WIND FLOW EXPECTED BY THE WEEKEND AND BETTER UPPER DYNAMIC...SOME PATCHES OF MOISTURE...REMNANTS OF THE WEAK FRONTAL BOUNDARY...WILL MOVE ACROSS THE LOCAL ISLANDS DURING PART OF THE WEEKEND AND EARLY NEXT WEEK...INCREASING AGAIN THE CLOUDINESS AND SHOWERS ACROSS THE FA...BUT AT THIS TIME NO SIGNIFICANT OR WIDESPREAD PRECIPITATION IS EXPECTED. && .AVIATION...BRIEF PERIODS OF MVFR CONDITIONS DUE TO CEILINGS AND MODERATE SHOWERS ARE EXPECTED AT TJMZ AND TJBQ UNTIL AT LEAST 09/22Z. MOUNTAIN OBSCURATIONS ARE LIKELY IN THAT SAME TIME FRAME OVER THE HIGHER CENTRAL MOUNTAINS OF PUERTO RICO. SOME PERIOD OF MVFR CONDITIONS ARE ALSO EXPECTED ACROSS TISX...TIST...TJPS AND TJSJ THIS EVENING AND OVERNIGHT AS A SURFACE TROUGH ACROSS THE LEEWARD ISLANDS AND EASTERN CARIBBEAN MOVES WESTWARD MOSTLY SOUTH OF THE REGION...BUT IN GENERAL NO SIGNIFICANT WEATHER FLYING HAZARDS ARE EXPECTED ACROSS THE REGION DURING THE NEXT 24 HOURS. LATEST TJSJ 12Z SOUNDING INDICATED A LIGHT AND VARIABLE WIND FLOW FROM THE SURFACE TO AROUND 15K FEET...BECOMING WESTERLY AND STRONGER ABOVE THAT LEVEL. && .MARINE...MARINERS SHOULD EXPECT PREVAILING WINDS OF 20 KNOTS OR LESS AND OVERALL SEAS OF 7 FEET OR LESS ACROSS THE LOCAL REGIONAL WATERS TONIGHT AND TOMORROW. A SMALL CRAFT ADVISORY IS IN EFFECT FOR THE OFFSHORE ATLANTIC WATERS THROUGH LATE TONIGHT. && .PRELIMINARY POINT TEMPS/POPS... SJU 74 85 74 84 / 20 20 20 20 STT 72 83 72 83 / 20 20 20 20 && .SJU WATCHES/WARNINGS/ADVISORIES... PR...NONE. VI...NONE. && 12/72/
HAZARDOUS WEATHER OUTLOOK FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS NATIONAL WEATHER SERVICE SAN JUAN PR 733 AM AST THU APR 9 2009 AMZ710>745-PRZ001>013-101145- 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- 733 AM AST THU APR 9 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PUERTO RICO 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. AMZ715-725-VIZ001-002-101145- ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX- NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS- 733 AM AST THU APR 9 2009 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.
2 heavy rain. Local standard time, as filed.
A home was reported flooded at Barrio Barrancas, along the the intersection of roads 773 and 771, in the municipality of Barranquitas.
A home was reported flooded at Luna Street in Old San Juan.
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, April 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 2026-09-24. Each event’s entry at NCEI: 168920, 168921.