A passing low level trough combined with diurnal heating and local effects to produce heavy shower activity mainly 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.
A passing low level trough combined with diurnal heating and local effects to produce heavy shower activity mainly 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 May 6, 4:15 PM AST, 50 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN JUAN PR 415 PM AST TUE MAY 6 2008 .DISCUSSION...A PASSING LOW LEVEL TROUGH BROUGHT SCATTERED TO NUMEROUS SHOWERS TO MUCH OF THE INTERIOR OF PUERTO RICO THIS AFTERNOON...WITH A FEW REPORTS OF THUNDER AND MINOR FLOODING ACROSS NORTHERN SECTIONS OF THE ISLAND. EXPECT THIS SHOWER ACTIVITY TO DIMINISH THROUGH THE EARLY EVENING HOURS...AND FOR SCATTERED SHOWERS TO DEVELOP ACROSS THE CARIBBEAN WATERS...VI AND SECTIONS OF EASTERN PUERTO RICO OVERNIGHT. THE OVERALL WIND FLOW BEHIND THIS PASSING TROUGH HAS BECOME MORE SOUTHEASTERLY THAN THE PAST FEW DAYS...AND THIS WILL RESULT IN SLIGHTLY WARMER TEMPERATURES ACROSS NORTHERN PUERTO RICO ALONG WITH A NORTHERLY STORM MOVEMENT ACROSS THE ISLANDS FOR THE NEXT SEVERAL DAYS. WITH A UPPER LEVEL TROUGH DIGGING TO THE NORTHWEST OF THE LOCAL AREA TOMORROW COMBINED WITH LINGERING MOISTURE AND DIURNAL EFFECTS...EXPECT SIMILAR SHOWER COVERAGE AGAIN TOMORROW AFTERNOON AND LIKELY FRIDAY. SLIGHTLY DRIER AIR AND A MORE EASTERLY WIND FLOW WILL RETURN TO THE AREA OVER THIS UPCOMING WEEKEND. && AVIATION...MOSTLY VFR CONDITIONS WILL PREVAIL ACROSS THE LOCAL TAF SITES OVERNIGHT. EXPECT SHOWER AND THUNDERSTORM ACTIVITY TO DEVELOP OVER THE INTERIOR OF PUERTO RICO AGAIN TOMORROW AFTERNOON...AND THIS WILL LIKELY RESULT IN BRIEF MVFR CONDITIONS AND ISOLATED TSRAS ACROSS TJBQ AND TJSJ BETWEEN 16-22Z TOMORROW. && .PRELIMINARY POINT TEMPS/POPS... SJU 73 86 73 87 / 40 40 40 40 STT 73 80 73 80 / 40 40 40 40 && .SJU WATCHES/WARNINGS/ADVISORIES... PR...NONE. VI...NONE. && 06/04
HAZARDOUS WEATHER OUTLOOK FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS NATIONAL WEATHER SERVICE SAN JUAN PR 609 AM AST TUE MAY 6 2008 AMZ710>750-PRZ001>013-071015- 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- 609 AM AST TUE MAY 6 2008 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...WEDNESDAY THROUGH MONDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. AMZ720-730-VIZ001-002-071015- ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX- NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS- 609 AM AST TUE MAY 6 2008 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...WEDNESDAY THROUGH MONDAY 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.
Twenty one homes were reported flooded at Urb. Victor Rojas I in Arecibo.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Puerto Rico in 2008Every state in 2008This day in weather historyWarnings in Puerto Rico, May 2008
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: 106630.