A moist low level easterly flow lingering behind the passage of a tropical wave in addition to favorable upper level atmospheric conditions produced scattered to numerous showers and thunderstorms which developed along the northern slopes of the Cordillera Central and into northwestern Puerto Rico where heavy rains produced flash flooding and rapid river rises.
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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 moist low level easterly flow lingering behind the passage of a tropical wave in addition to favorable upper level atmospheric conditions produced scattered to numerous showers and thunderstorms which developed along the northern slopes of the Cordillera Central and into northwestern Puerto Rico where heavy rains produced flash flooding and rapid river rises.
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 Jun 8, 3:18 PM AST, 3 hours 7 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN JUAN PR 318 PM AST SUN JUN 8 2008 .DISCUSSION...THE WEAK TROPICAL WAVE SOUTH OF HISPANIOLA THIS AFTERNOON...WILL CONTINUE TO MOVE WESTWARD AWAY FROM THE REGION AND WITHOUT INFLUENCES ON THE LOCAL WEATHER. LATEST SATELLITE IMAGES AND THE GFS MODEL GUIDANCE SUGGESTS THAT DRY AIR WILL ENCOMPASS THE LOCAL ISLANDS BEHIND THE TROPICAL WAVE. THIS DRY AND RELATIVE STABLE AIR MASS WILL PREVAIL ACROSS THE REGION UNTIL AT LEAST EARLY THURSDAY...WHEN A TROPICAL WAVE ALONG 42 WEST THIS AFTERNOON...WILL REACH THE REGION...INCREASING AGAIN THE CHANCES OF SHOWERS AND THUNDERSTORMS. AS HIGH PRESSURE CONTINUE TO DEVELOP ACROSS THE REGION UNTIL THE MIDDLE OF THE WEEK...THE LIMITED MOISTURE AVAILABLE WILL COMBINE WITH THE EXPECTED STRONG DAYTIME HEATING AND LOCAL ISLANDS EFFECTS TO PROMOTE THE DEVELOPMENT OF SCATTERED SHOWERS AND A FEW THUNDERSTORMS ESPECIALLY DURING THE AFTERNOONS AND MAINLY ACROSS THE WESTERN AND INTERIOR SECTIONS OF PUERTO RICO. NO SIGNIFICANT PRECIPITATION IS EXPECTED ACROSS THE U.S. VIRGIN ISLANDS. && .AVIATION...MOSTLY VFR CONDITIONS ARE EXPECTED ACROSS ALL OF THE LOCAL TAF SITES THIS EVENING AND OVERNIGHT. FOR TOMORROW AFTERNOON ONLY BRIEF PERIODS OF MVFR CONDITIONS ARE POSSIBLE NEAR TJBQ AND TJMZ AS SCATTERED SHOWERS AND A FEW THUNDERSTORMS DEVELOP OVER INLAND AND WEST PR AND DRIFT WEST NORTHWESTWARD ACROSS THIS AREA. TNCM AND TKPK WILL REMAIN WITH MOSTLY VFR CONDITIONS DURING THE NEXT 24 HOURS...EXCEPT FOR BRIEF PERIODS OF LOCALLY BROKEN CEILINGS. IN GENERAL...NO HAZARDOUS FLYING CONDITIONS ARE EXPECTED DURING THE NEXT 24 HOURS. LATEST 12Z TJSJ SOUNDING INDICATED A SOUTHEASTERLY WIND FLOW UP TO 15 KNOTS FROM THE SURFACE TO 5K FEET...A LIGHT BUT MOSTLY EASTERLY WIND FLOW FROM 5K FEET TO AROUND 20K FEET AND A SOUTHWESTERLY WIND FLOW UP TO 25 KNOTS ABOVE 20 K FEET. && .MARINE...QUIET MARINE CONDITIONS WILL PREVAIL ACROSS THE REGIONAL COASTAL WATERS WITH SEAS IN THE 2 TO 5 FOOT RANGE AND WINDS IN THE 5 TO 16 KNOTS RANGE THROUGH MONDAY. && .PRELIMINARY POINT TEMPS/POPS... SJU 75 86 75 86 / 20 20 40 40 STT 76 85 76 85 / 20 20 40 40 && .SJU WATCHES/WARNINGS/ADVISORIES... PR...NONE. VI...NONE. && 72/07/
HAZARDOUS WEATHER OUTLOOK FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS NATIONAL WEATHER SERVICE SAN JUAN PR 512 AM AST SUN JUN 8 2008 AMZ710>750-PRZ001>013-091000- 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- 512 AM AST SUN JUN 8 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...MONDAY THROUGH SATURDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. AMZ720-730-VIZ001-002-091000- ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX- NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS- 512 AM AST SUN JUN 8 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...MONDAY THROUGH SATURDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. SR
The national radar mosaic for the moment the first event began.
3 heavy rain, 1 flood, 1 debris flow. Local standard time, as filed.
Heavy rain was reported from Caparra to Guaynabo, Martinez Nadal Avenue was reported flooded near San Patrico Plaza Mall.
Road flooding was reported in Levittown, Toa Baja.
An automobile was reported trapped by flood waters in front of Collage along Highway 2 in Manati.
Several homes were reported flooded at the Victor Rojas I sector in the municipality of Arecibo.
Some mudslides were reported along road 129 from Lares municipality to Hatillo municipality.
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, June 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: 121398, 111692, 121387, 142984, 142986.