combined with deep tropical moisture to enhance convection across north central Puerto Rico, which led heavy rains across the River Cibuco basin.
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 tropical wave interacting with an upper level trough...combined with deep tropical moisture to enhance convection across north central Puerto Rico, which led heavy rains across the River Cibuco basin.
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 26, 3:14 PM AST, 2 hours 27 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN JUAN PR 314 PM AST SAT JUN 26 2010 .SYNOPSIS...A CUT-OFF LOW CURRENTLY DRIFTING AT ABOUT 6 KNOTS FROM EAST TO WEST WILL PASS ABOUT 220 MILES NORTH OF PUERTO RICO ON SUNDAY. A NORTH-SOUTH RIDGE OVER THE AREA EARLY NEXT WEEK WILL SLIDE WEST AS ANOTHER CUT-OFF LOW LOOPS OUT OF THE CENTRAL ATLANTIC DURING THE UPCOMING WEEK AND MOVES TOWARD THE LOCAL AREA EARLY THE FOLLOWING WEEK. AT MID LEVELS...HIGH PRESSURE RIDGES FROM THE FLORIDA/GEORGIA ATLANTIC WATERS TO THE EASTERN TROPICAL ATLANTIC INTERRUPTED BY A WEAK LOW JUST NORTH OF THE MONA CHANNEL. THIS LOW WILL MOVE NORTHWEST THROUGH TUESDAY WHILE HIGH PRESSURE BUILDS OVER THE MID- LATITUDE ATLANTIC NORTH OF THE WINDWARD ISLANDS. BY THE END OF THE WEEK HIGH PRESSURE WILL STRETCH FROM THE BAHAMA ISLANDS TO THE CENTRAL ATLANTIC. AT LOWER LEVELS...HIGH PRESSURE WILL DOMINATE THE CENTRAL ATLANTIC THROUGH SATURDAY OF NEXT WEEK. THE TROPICAL WAVE APPROACHING PUERTO RICO WILL PASS THROUGH THE AREA TONIGHT OR EARLY SUNDAY MORNING...BUT HAS BEEN GREATLY AFFECTED BY THE UPPER LEVEL LOW NORTH OF THE AREA. PATCHES OF MOISTURE IN THE TRADE WIND FLOW AROUND THE HIGH WILL MOVE THROUGH DURING THE FIRST FOUR DAYS OF NEXT WEEK WITH A WEAK TROUGH PASSING WEDNESDAY. && .DISCUSSION...UNDER INTENSE INSOLATION STRONG THUNDERSTORMS DEVELOPED WITH COPIOUS LIGHTING. HEAVY RAINS COVERED MUCH OF WESTERN PUERTO RICO. AS OF 3 PM THE NORTH AND SOUTH COASTAL PLAINS AND THE SOUTHEAST COASTAL PLAIN WERE DRY. THE UPPER LEVEL LOW SWEPT INTO THE AREA TODAY WITH SUBSIDENCE AND SLOWED AND DEFORMED THE TROPICAL WAVE ON ITS WAY THROUGH THE AREA FROM THE EAST. IN ADDITION LOW PRESSURE STILL APPEARS TO BE ATTEMPTING TO FORM AT THE APEX OF THIS WAVE NEAR 21 NORTH 61 WEST. BETWEEN THE UPPER LOW AND THE TENTATIVE CYCLOGENESIS THE WAVE HAS FOUND IT DIFFICULT TO PROGRESS INTO THE AREA. AT THE PRESENT TIME CONVECTION ASSOCIATED WITH THE WAVE STRETCHES FROM 16 NORTH 68 WEST TO 18 NORTH 62 WEST AND WAS DIFFICULT TO TRACK AS IT MAY BE NEARLY STATIONARY AND CONVERGING INTO THE FORMING LOW. THE GFS SHOWS THIS AREA OF MOISTURE MOVING ACROSS PUERTO RICO SUNDAY MORNING...BUT ALSO SHOWS SOME SPLITTING AROUND THE ISLAND MAKING FORECASTS OF RAIN QUANTITIES DIFFICULT. EXPECT MORE CLOUDINESS TOMORROW AND SOME SHIFT IN THE RAIN PATTERN TOWARD THE NORTHWEST OF PUERTO RICO. THE U.S. VIRGIN ISLANDS SHOULD REMAIN IN A SCATTERED TO NUMEROUS SHOWER AREA FOR MUCH OF THE DAY SUNDAY. MOISTURE MOVES OUT DURING THE DAY MONDAY...BUT STILL EXPECT SOME VIGOROUS SHOWER ACTIVITY IN NORTHWEST PUERTO RICO DUE TO LOCAL EFFECTS AND CONVERGENCE THERE. OTHERWISE THE NORMAL SUMMER PATTERN FOR RAIN SHOULD PREVAIL MUCH OF NEXT WEEK. && .AVIATION... PERIODS OF MVFR OR EVEN BRIEF IFR CONDITIONS WILL BE POSSIBLE UNTIL AT LEAST 26/23Z ACROSS TJMZ...TIST AND TISX IN TSRA. ONLY BRIEF PERIODS OF MVFR CONDITIONS ARE EXPECTED ELSEWHERE ACROSS THE REST OF THE TAF SITES IN A QUICK PASSING SHRA OR VCSH. TJSJ 26/12Z SOUNDING INDICATED A LIGHT EASTERLY WIND FLOW FROM THE SURFACE TO AROUND 15K FEET...BECOMING WESTERLY AND THEN NORTHWESTERLY AND STRONGER ALOFT. && .MARINE...IN THE ATLANTIC...WINDS AND SEAS ARE EXPECTED TO SUBSIDE THROUGH TUESDAY...BUT REMAIN BELOW SMALL CRAFT ADVISORY CRITERIA FOR AT LEAST THE NEXT 7 DAYS. IN THE CARIBBEAN...WINDS AND SEAS ARE EXPECTED TO SUBSIDE THROUGH MONDAY. DUE TO INCREASING GRADIENTS...OUTER CARIBBEAN WATERS MAY SEE SEAS CLOSE TO 7 FEET BY THE END OF NEXT WEEK. && .PRELIMINARY POINT TEMPS/POPS... SJU 78 88 78 91 / 30 60 40 30 STT 80 87 78 88 / 50 50 40 20 && .SJU WATCHES/WARNINGS/ADVISORIES... PR...NONE. VI...NONE. && 72/12
HAZARDOUS WEATHER OUTLOOK FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS NATIONAL WEATHER SERVICE SAN JUAN PR 616 AM AST SAT JUN 26 2010 AMZ710>745-PRZ001>013-271030- 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- 616 AM AST SAT JUN 26 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PUERTO RICO AND THE ADJACENT COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT A TROPICAL WAVE LOCATED OVER EASTERN PUERTO RICO EARLY THIS MORNING...WILL CONTINUE MOVING WEST NORTHWEST ACROSS THE REMAINDER OF THE LOCAL AREA TODAY AND THEN AWAY FROM THE REGION TONIGHT. AN UPPER LEVEL LOW WILL REMAIN LOCATED JUST NORTH THROUGH NORTHWEST OF THE LOCAL AREA TODAY THROUGH SUNDAY. THE COMBINATION OF THESE TWO FEATURES...A MOIST AND UNSTABLE AIR MASS AND LOCAL EFFECTS...WILL RESULT IN NUMEROUS TO WIDESPREAD SHOWERS AND ISOLATED THUNDERSTORMS ACROSS THE LOCAL ISLANDS TODAY THROUGH TONIGHT. PERIODS OF HEAVY RAINFALL AND SOME URBAN AND SMALL STREAM FLOODING ARE EXPECTED IN A FEW LOCATIONS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY ADDITIONAL SHOWERS AND THUNDERSTORMS ARE EXPECTED SUNDAY...WITH THE POTENTIAL FOR LOCALIZED HEAVY RAINFALL AND FLOODING. .SPOTTER INFORMATION STATEMENT... SPOTTER REPORTS OF HEAVY RAINFALL OR FLOODING WOULD BE GREATLY APPRECIATED. AMZ715-725-VIZ001-002-271030- ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX- NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS- 616 AM AST SAT JUN 26 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE U.S. VIRGIN ISLANDS AND THE ADJACENT COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT A TROPICAL WAVE LOCATED OVER EASTERN PUERTO RICO EARLY THIS MORNING...WILL CONTINUE MOVING WEST NORTHWEST ACROSS THE REMAINDER OF THE LOCAL AREA TODAY AND THEN AWAY FROM THE REGION TONIGHT. AN UPPER LEVEL LOW WILL REMAIN LOCATED JUST NORTH THROUGH NORTHWEST OF THE LOCAL AREA TODAY THROUGH SUNDAY. THE COMBINATION OF THESE TWO FEATURES...A MOIST AND UNSTABLE AIR MASS AND LOCAL EFFECTS...WILL RESULT NUMEROUS SHOWERS AND ISOLATED THUNDERSTORMS ACROSS THE LOCAL ISLANDS TODAY THROUGH TONIGHT. PERIODS OF HEAVY RAINFALL AND SOME URBAN AND GUT FLOODING ARE EXPECTED IN A FEW LOCATIONS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY ADDITIONAL SHOWERS AND THUNDERSTORMS ARE EXPECTED SUNDAY...WITH THE POTENTIAL FOR LOCALIZED HEAVY RAINFALL AND FLOODING. .SPOTTER INFORMATION STATEMENT... SPOTTER REPORTS OF HEAVY RAINFALL OR FLOODING WOULD BE GREATLY APPRECIATED.
The San Juan radar (TJUA), 54 km away, was scanning. The volume nearest the first event began at 21:39 UTC.
1 flash flood. Local standard time, as filed.
USGS sensor at Rio Grande Manati in Ciales rose to 12 feet. Flood stage is 10 feet.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Puerto Rico in 2010Every state in 2010This day in weather historyWarnings in Puerto Rico, June 2010
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: 247665.