An upper level trough combined with daytime heating and local effects to produced scattered showers with isolated strong thunderstorms.
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.
An upper level trough combined with daytime heating and local effects to produced scattered showers with isolated strong thunderstorms.
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 30, 5:15 AM AST, 7 hours 30 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN JUAN PR 515 AM AST MON JUN 30 2014 .SYNOPSIS...WEAK UPPER LEVEL TROUGH NORTH OF PUERTO RICO WILL MOVE EAST AS DISSIPATES OVER THE NEXT 24 HOURS. AT LOW LEVELS...A TROPICAL WAVE LOCATED OVER THE LESSER ANTILLES THIS MORNING WILL MOVE WESTWARD ACROSS THE REGION LATER TODAY. MOISTURE AND INSTABILITY WILL PEAK LATE TONIGHT AND OVERNIGHT. AS A RESULT...EXPECT WEATHER CONDITIONS TO DETERIORATE AFTER NOON AS THE WAVE APPROACHES TO THE LOCAL ISLANDS. && .DISCUSSION...SATELLITE IMAGERY AS WELL AS LATEST SURFACE ANALYSIS SHOW THE AXIS OF THE TROPICAL WAVE OVER THE LESSER ANTILLES. IN ADDITION...SATELLITE DERIVED PWAT ANALYSIS INDICATE A MAXIMUM OF 2.5 INCHES OF PRECIPITABLE WATER ACCOMPANIED THIS WAVE. ORGANIZED CONVECTION ASSOCIATED WITH THE AFOREMENTIONED WAVE HAVE BEEN OBSERVED OVER GUADELOUPE AND DOMINICA EARLY THIS MORNING. THIS WAVE IS FORECAST TO MOVE WESTWARD ACROSS THE LOCAL CARIBBEAN WATERS LATER TODAY THROUGH EARLY TUESDAY MORNING. THEREFORE...SHOWER ACTIVITY WILL INCREASE ESPECIALLY ACROSS THE CARIBBEAN WATERS AND THE WINDWARD SIDE OF THE ISLANDS AFTER NOON TODAY. LOCALLY HEAVY RAINFALL AS WELL AS GUSTY WINDS WILL BE POSSIBLE WITH THIS FEATURE. OPERATIONAL MODELS SUGGEST A DRIER/DUSTY AIR MASS REACHING THE LOCAL AREA LATE TUESDAY AND CONTINUE THROUGH FRIDAY/INDEPENDENCE DAY. LOW MOISTURE CONTENT AND A RELATIVELY STABLE ATMOSPHERE IN THE WAKE OF THE WAVE WILL LIMIT THE SHOWER DEVELOPMENT ACROSS THE LOCAL ISLANDS. ANY SHOWER WILL BE DEPENDENT ON INCOMING MOISTURE RIDING IN ON THE TRADES. SEA BREEZES CONVERGENCE ACROSS WESTERN PR WILL ALSO PRODUCE A FEW ISOLATED SHOWERS/T-STORMS EACH AFTERNOON. THE NEXT TROPICAL WAVE WILL REACH THE FORECAST AREA ON SATURDAY...BRINGING ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS TO THE ISLANDS. && .AVIATION...VFR CONDITIONS WILL CONTINUE TO PREVAIL ACROSS MOST TAF SITES THROUGH 30/18Z. BRIEF PERIODS OF MVFR CONDITIONS CAN BE EXPECTED OVER TNCM AND TKPK IN SHRA/TSRA AS TROPICAL WAVE MOVE THROUGH. BRIEF PERIODS OF MVFR CONDITIONS CAN BE EXPECTED OVER TJMZ AND TJBQ WITH MOUNTAIN OBSCURATIONS IN SHRA BETWEEN 30/18Z-30/22Z. CLOUDINESS WITH SHOWERS WILL INCREASE OVER TIST AND TISX TONIGHT AS TROPICAL WAVE APPROACHES FROM THE EAST. LOW LEVEL WINDS WILL CONTINUE MAINLY EAST TO EAST SOUTHEAST AT 10 TO 15 KTS. && .MARINE...WINDS OF 13-19 KT AND SEAS OF 3-5 FEET CAN BE EXPECTED OVER THE NEXT SEVERAL DAYS. MARINE CONDITIONS WILL CHANGE LITTLE THE REST OF THE WEEK. HOWEVER...SEAS OF 6 FEET ARE LIKELY ACROSS THE OFFSHORE CARIBBEAN WATERS AS THE TROPICAL WAVE MOVES ACROSS THE LOCAL REGION. IN GENERAL...SEAS WILL REMAIN BELOW ADVISORY CRITERIA THROUGH THE END OF THE WEEK. && .PRELIMINARY POINT TEMPS/POPS... SJU 89 78 90 79 / 30 50 50 20 STT 88 79 90 81 / 30 20 20 20 && .SJU WATCHES/WARNINGS/ADVISORIES... PR...NONE. VI...NONE. COASTAL WATERS...NONE. && 71/11
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN JUAN PR 635 AM AST MON JUN 30 2014 AMZ710>745-PRZ001>013-011045- 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- 635 AM AST MON JUN 30 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PUERTO RICO AND THE ADJACENT ATLANTIC COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT A TROPICAL WAVE WILL MOVE OVER THE AREA TONIGHT INTO TUESDAY. LOCALLY HEAVY RAINFALL AS WELL AS GUSTY WINDS WILL BE POSSIBLE WITH THIS FEATURE. URBAN AND SMALL STREAM FLOODING IS LIKELY IN SOME AREAS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY MOISTURE ASSOCIATED WITH A TROPICAL WAVE WILL CONTINUE TO PROMOTE SHOWER AND THUNDERSTORMS OVER THE LOCAL AREA TUESDAY MORNING. LOCALIZED FLOODING WILL BE POSSIBLE AS THIS WAVE MOVE THROUGH THE AREA. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED AT THIS TIME. AMZ715-725-VIZ001-002-011045- ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX- NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS- 635 AM AST MON JUN 30 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE U.S. VIRGIN ISLANDS AND THE ADJACENT COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT TROPICAL WAVE WILL MOVE OVER THE AREA TONIGHT INTO TUESDAY. LOCALLY HEAVY RAINFALL AS WELL AS GUSTY WINDS WILL BE POSSIBLE WITH THIS FEATURE. URBAN AND SMALL STREAM FLOODING IS LIKELY IN SOME AREAS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY MOISTURE ASSOCIATED WITH A TROPICAL WAVE WILL CONTINUE TO PROMOTE SHOWER AND THUNDERSTORMS OVER THE LOCAL ISLANDS TUESDAY MORNING. LOCALIZED FLOODING WILL BE POSSIBLE AS THIS WAVE MOVE THROUGH THE AREA. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED AT THIS TIME.
The San Juan radar (TJUA), 58 km away, was scanning. The volume nearest the first event began at 16:42 UTC.
1 thunderstorm wind. Local standard time, as filed.
Trees down in Urb. Las Delicias, Real An n and Tibes over PR-503.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Puerto Rico in 2014Every state in 2014This day in weather historyWarnings in Puerto Rico, June 2014
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: 531222.