Moist southeast low level flow across Northeast Caribbean feeding into broad low pressure trough well north of Puerto Rico. On the morning of the 10th scattered showers and isolated thunderstorms moved inland across the southeastern municipalities producing moderate to locally heavy rainfall.
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.
Moist southeast low level flow across Northeast Caribbean feeding into broad low pressure trough well north of Puerto Rico. On the morning of the 10th scattered showers and isolated thunderstorms moved inland across the southeastern municipalities producing moderate to locally heavy rainfall. During the late afternoon and evening showers and thunderstorms developed over the west interior and produced periods of heavy rains.
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 10, 5:00 AM AST, 3 hours 29 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN JUAN PR 500 AM AST WED JUN 10 2009 .SYNOPSIS... SURFACE HIGH PRESSURE ACROSS SUBTROPICAL ATLANTIC EXTENDING WESTWARD ACROSS THE NORTHEAST CARIBBEAN...AND A BROAD SURFACE TROUGH ACROSS THE CENTRAL CARIBBEAN...WILL MAINTAIN A LIGHT SOUTHEAST WIND FLOW ACROSS THE REGION FOR THE NEXT FEW DAYS. MID TO UPPER LEVEL RIDGE WILL REMAIN ACROSS THE NORTHEAST CARIBBEAN AT LEAST THROUGH THE END OF THE WEEK. TROUGHINESS WILL DEEPEN ACROSS THE WESTERN ATLANTIC. .DISCUSSION...SOME HAZY SKIES WERE VISIBLE OVERNIGHT ACROSS THE LOCAL AREA. THIS MAY BE DUE TO RESIDUAL SAHARAN DUST BROUGHT BY THE PASSAGE FEW DAYS AGO OF A WEAK TROPICAL WAVE. EARLY THIS MORNING A LINE OF SCATTERED SHOWERS WERE DETECTED BY THE DOPPLER WEATHER RADAR ACROSS THE NEARSHORE WATERS SOUTHEAST OF PUERTO RICO...AND ANOTHER LINE EXTENDING FROM CULEBRA...NORTHWEST ACROSS THE ATLANTIC WATERS. SOME OF THESE SHOWERS EARLY THIS MORNING...WERE AFFECTING THE MUNICIPALITIES OF SOUTHEAST PUERTO RICO...BUT MAINLY OVER MAUNABO...GUAYAMA...AND ARROYO. SURFACE HIGH PRESSURE SYSTEM LOCATED ACROSS THE SUBTROPICAL ATLANTIC EARLY THIS MORNING WILL KEEP A MAINLY SOUTHEAST WIND FLOW ACROSS PUERTO RICO AT LEAST THROUGH FRIDAY. LATEST MIMIC TOTAL PRECIPITABLE WATER PRODUCT STILL SHOWS ENOUGH MOISTURE LINGERING ACROSS THE LOCAL AREA. THIS MOISTURE...IN COMBINATION WITH THE SOUTHEAST WIND FLOW...WILL ENHANCE THE DEVELOPMENT OF SHOWER ACTIVITY ACROSS THE LOCAL AREA...MAINLY EACH AFTERNOON OVER THE WESTERN INTERIOR AND NORTHWEST SECTIONS OF PUERTO RICO. ALSO...AN INDUCE SURFACE TROUGH WILL BE CLOSE TO OUR AREA...HELPING IN THE DEVELOPMENT OF STRONG THUNDERSTORMS ACROSS THE NORTHERN HALF OF PUERTO RICO AS WELL ACROSS THE LOCAL COASTAL WATERS. LATEST SURFACE OBSERVATIONS...INDICATED A VERY LIGHT WIND FLOW ACROSS THE LOCAL AREA. IN FACT...LATEST PROG SOUNDINGS ARE SHOWING THAT THIS LIGHT WIND FLOW WILL CONTINUE THROUGH AT LEAST EARLY NEXT WEEK. PEOPLE AND VISITORS ACROSS THE WESTERN INTERIOR...WEST...AND NORTHWEST SECTIONS OF PUERTO RICO NEED TO BE ALERT TODAY FOR RISING RIVERS...CREEK AN URBAN AND SMALL STREAM FLOODING AND EVEN FLASH FLOODING. IN THE LONG TERM...COMPUTER MODELS SUGGEST THAT A TROPICAL WAVE CURRENTLY NEAR 30 WEST LONGITUDE EARLY THIS MORNING...WILL TRACK WESTWARD DURING THE NEXT SEVERAL DAYS...AND WILL APPROACH THE LOCAL ISLANDS BY MID NEXT WEEK. THIS FEATURE...COMBINE WITH UPPER LEVEL TROUGH TO OUR WEST...WILL PRODUCE UNSTABLE ATMOSPHERIC CONDITIONS BY THIS PERIOD. && .AVIATION...EXPECTING MORNING SHRA ACTIVITY AT MOST SITES. INTERMITTENT MVFR CIGS/VSBYS AND TEMPO IFR POSSIBLE AT TJSJ...TIST...TISX UNTIL AT LEAST 14Z. BY AFTERNOON...TSRA EXPECTED AT TJBQ AROUND 18-21Z WITH AT LEAST MVFR THERE. SURFACE WINDS WILL BE VERY WEAK AND FROM THE SE. && .PRELIMINARY POINT TEMPS/POPS... SJU 89 76 88 78 / 50 40 40 20 STT 84 78 88 76 / 50 50 50 30 && .SJU WATCHES/WARNINGS/ADVISORIES... PR...NONE. VI...NONE. && 93/71
HAZARDOUS WEATHER OUTLOOK FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS NATIONAL WEATHER SERVICE SAN JUAN PR 427 AM AST WED JUN 10 2009 AMZ710>745-PRZ001>013-111000- 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- 427 AM AST WED JUN 10 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PUERTO RICO AND THE ADJACENT COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT SHOWERS AND THUNDERSTORMS ARE EXPECTED TO REFORM OVER THE NORTHWEST AND WEST CENTRAL PORTIONS OF PUERTO RICO WITH HEAVY RAIN. SOME AREAS WILL EXPERIENCE URBAN AND SMALL STREAM FLOODING AND LARGER RIVERS OF THE NORTHWEST MAY COME NEAR MINOR FLOOD STAGE BY THIS EVENING. RAIN AMOUNTS WILL LIKELY EXCEED 4 INCHES IN THE AREAS WITH THE HEAVIEST RAIN. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY NO HAZARDOUS WEATHER EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... AMZ715-725-VIZ001-002-111000- ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX- NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS- 427 AM AST WED JUN 10 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 EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY NO HAZARDOUS WEATHER EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT...
The San Juan radar (TJUA), 19 km away, was scanning. The volume nearest the first event began at 12:28 UTC.
2 flash flood, 1 flood, 1 heavy rain. Local standard time, as filed.
Road 182 in Barrio Calabaza was reported flooded due to River Guayanes and Cano Santiago in the municipality of Yabucoa.
River Fajardo was reported out of its banks and overflowing the intersection of Highways PR-53 and PR-3 in Fajardo.
Spotter from San Sebastian reported a 40 mph wind gust, heavy rains, 2.10 inches in the last 10 minutes, and 1-2 mm size hail.
River Cibuco was reported overflowing its banks along road 620 in the Fatima sector of the Vega Alta municipality.
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, June 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: 184423, 184428, 185785, 184436.