A tropical wave combined with an upper level trough to produce scattered to numerous showers with isolated strong thunderstorms. Some thunderstorms produced strong gusty winds and hail.
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 combined with an upper level trough to produce scattered to numerous showers with isolated strong thunderstorms. Some thunderstorms produced strong gusty winds and hail.
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 22, 11:31 AM AST, 1 hour 59 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN JUAN PR 1131 AM AST MON JUN 22 2015 .UPDATE...LEADING EDGE OF TROPICAL WAVE WAS PRODUCING SHOWERS AND THUNDERSTORMS OVER THE COASTAL WATERS OF PUERTO RICO AND THE U.S. VIRGIN ISLANDS. THIS ACTIVITY WILL SPREAD WESTWARD AND WILL AFFECT THE U.S VIRGIN ISLANDS AND EASTERN PUERTO RICO LATER THIS AFTERNOON. FORECAST IS ON TRACK WITH ONGOING WEATHER CONDITIONS. NO CHANGES NEEDED TO FORECAST GRIDS. && .AVIATION...MVFR/IFR CONDITIONS ARE EXPECTED OVER TNCM AND TKPK THROUGH THE FORECAST PERIOD. SHOWERS WITH THUNDERSTORMS WILL PRODUCE BRIEF PERIODS OF MVFR CONDITIONS OVER TIST...AND TISX FROM 22/16Z THROUGH THE FORECAST PERIOD. LOW LEVEL WINDS WILL CONTINUE MAINLY EAST SOUTHEAST AT 15 TO 20 KTS. && .MARINE...A MARINE WEATHER STATEMENT HAS BEEN ISSUED AS SHOWERS AND THUNDERSTORMS ASSOCIATED WITH THE LEADING EDGE OF TROPICAL WAVE MOVES ACROSS THE LOCAL WATERS. SEAS UP TO 6 FEET AND WINDS UP TO 20 KNOTS ARE EXPECTED. && .PREV DISCUSSION... /ISSUED 627 AM AST MON JUN 22 2015/ SYNOPSIS...APPROACHING TROPICAL WAVE WILL BRING AN INCREASE IN MOISTURE AS WELL AS SHOWER ACTIVITY. TROPICAL UPPER TROPOSPHERIC TROUGH (TUTT) IS SLOWLY MOVING WEST FROM THE NORTH OF PUERTO RICO TO THE NORTH OF HISPANIOLA...THIS WILL GRADUALLY INCREASE THE INSTABILITY ACROSS THE LOCAL AREA FOR THE NEXT FEW DAYS. SURFACE HIGH PRESSURE ACROSS THE CENTRAL ATLANTIC WILL KEEP MODERATE TO FRESH EAST TO E-SE WINDS THROUGH WEDNESDAY. DISCUSSION...A FEW SHOWERS WERE OBSERVED OVERNIGHT ACROSS THE LOCAL WATERS WITH ONLY A FEW OF THEM BRIEFLY AFFECTING LAND AREAS. OTHERWISE IT WAS RELATIVELY CALM NIGHT. THE BIG STORY OF THE DAY IS THE UPCOMING TROPICAL WAVE THAT IS EXPECTED LATER TODAY AND HOW IT INTERACTS WITH THE TUTT TO THE NORTH OF PR AND HISPANIOLA. THIS COMBINATION SHOULD CAUSE AN INCREASE OF SHOWER AND THUNDERSTORM ACTIVITY THIS AFTERNOON AND OVERNIGHT INTO TUESDAY MORNING. WHEN IT COMES TO RAINFALL THE NAM...GFS...AND ECMWF MODELS HAVE SOMEWHAT DIFFERENT SOLUTIONS. HOWEVER CURRENT OBSERVATIONS OF THE RADAR IN GUADELOUPE SUGGEST THAT THE GFS MODEL HAS A BETTER HANDLE ON THIS THAN THE ECMWF. THE NAM MODEL PUTS THE BULK OF THE PRECIP TODAY...ESPECIALLY THIS AFTERNOON ACROSS THE NW QUADRANT OF PR...WITH LITTLE RAIN TONIGHT AND TUESDAY...THE ECMWF AGREES THAT MOST OF THE RAIN WILL BE TODAY BUT MOST OF IT ACROSS THE EASTERN SECTIONS OF PR AND ACROSS THE USVI...WHILE THE GFS MODEL SEEMS TO BE A HYBRID OF BOTH WITH RAINFALL BULLSEYES ACROSS EASTERN WESTERN PR TODAY BUT LINGERING INTO EARLY TUESDAY WITH A LARGE AMOUNT OF PRECIP OVERNIGHT ACROSS EASTERN PR AND WEST OF THE USVI EARLY ON TUESDAY. GIVEN THE CURRENT SETUP...THE GFS SOLUTION SEEMS A BIT MORE REALISTIC GIVEN THE AMOUNT OF MOISTURE THAT THIS WAVE WILL BRING...ESPECIALLY BEHIND ITS AXIS AS IT APPROACHES ON TUESDAY. HAVING SAID THAT...SAHARAN DUST WILL START TO FILTER IN ON TUESDAY MORNING SO THE SIGNIFICANT RAIN ON TUESDAY MORNING MAY BE LIMITED IF THE SAHARAN DUST CATCHES UP. AT THIS TIME WE BELIEVE THAT SHOWERS AND THUNDERSTORMS WILL GRADUALLY INCREASE ACROSS THE LOCAL WATERS...USVI AND EASTERN PR THIS AFTERNOON WITH LOCALLY INDUCED SHOWERS AND THUNDERSTORMS ACROSS THE NW QUADRANT OF PR. THE TROPICAL WAVE AND THE TUTT WILL COMBINE AND BRING SHOWERS AND THUNDERSTORMS OVERNIGHT...ESPECIALLY ACROSS THE EASTERN MUNICIPALITIES OF PR AS WELL AS THE USVI. CURRENTLY...THE TROPICAL WAVE LOOKS QUITE DECENT ON THE GUADELOUPE RADAR AS WELL AS ON SATELLITE...THERE IS LITTLE TO SUGGEST THAT THE WAVE WILL WEAKEN TONIGHT...AT LEAST UNTIL THE SAHARAN DUST CATCHES UP ON TUESDAY. ONCE THE SAHARAN DUST CATCHES UP ON TUESDAY...THE CHANCES OF RAIN LATER ON TUESDAY AND FOR THE NEXT SEVERAL DAYS WILL BE REDUCED. ALTHOUGH WE WILL NOT RULE OUT LOCALLY INDUCED CONVECTION IN THE AFTERNOONS...AS FAR AS MORE GENERALIZED SHOWERS WE MAY HAVE TO WAIT UNTIL THE FOLLOWING SATURDAY WHEN ANOTHER TROPICAL WAVE IS FORECAST TO APPROACH THE LOCAL ISLANDS. AVIATION...VFR CONDS EXPECTED EARLY IN THE FCST PERIOD AT ALL TAF SITES. HOWEVER...SHRA/TSRA WILL GRADUALLY INCREASE ACROSS THE FLYING AREA AFT 12Z AS TROPICAL WAVE MOVES ACROSS THE REGION. PERIODS OF MVFR/BRIEF IFR CONDS POSSIBLE AS TSRA SPREADS FROM THE LEEWARD ISLANDS TO THE USVI TERMINALS BY NOON AST TODAY. SIMILAR CONDITIONS EXPECTED IN THE AFTERNOON ACROSS MAINLAND PR WITH MOUNTAIN OBSCURATIONS AND SEVERAL BKN/OVC LAYERS THRU THE OVERNIGHT. LLVL WINDS WILL BE FROM THE SOUTHEAST AT 15-25 KT...WITH HIGHER GUSTS NEAR TSRA. MARINE...SEAS NEAR SHORE OF 4 FEET OR LESS AND UP TO 6 FEET OVER THE OFFSHORE WATERS. EASTERLY TRADE WINDS UP TO 20 KNOTS WILL CONTINUE TODAY. SMALL CRAFT SHOULD EXERCISE CAUTION DUE TO SEAS UP TO 6 FEET AND WIND UP TO 20 KNOTS. && .PRELIMINARY POINT TEMPS/POPS... SJU 85 79 84 81 / 40 50 30 30 STT 82 81 82 81 / 40 60 30 30 && .SJU WATCHES/WARNINGS/ADVISORIES... PR...NONE. VI...NONE. AM...NONE. && 71/72
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN JUAN PR 504 AM AST MON JUN 22 2015 AMZ710>745-PRZ001>013-230915- 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- 504 AM AST MON JUN 22 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PUERTO RICO AND THE ADJACENT ATLANTIC COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT .THUNDERSTORMS...THERE IS A CHANCE OF THUNDERSTORMS WITH HEAVY RAINFALL AND BRIEF GUSTY WINDS THIS AFTERNOON ACROSS PORTIONS OF THE CORDILLERA CENTRAL AND NORTHWESTERN PR. THEN...BY LATE AFTERNOON INTO EARLY EVENING THUNDERSTORMS ARE POSSIBLE ACROSS THE EASTERN HALF OF PR INCLUDING VIEQUES AND CULEBRA. .FLOODING...HEAVY RAINS COULD LEAD TO URBAN AND SMALL STREAM FLOODING. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY A TROPICAL WAVE IS EXPECTED TO CREATE PERIODS OF SHOWERS AND THUNDERSTORMS THROUGH EARLY TUESDAY MORNING. URBAN AND SMALL STREAM FLOODING IS POSSIBLE WITH THE HEAVIEST SHOWERS. .SPOTTER INFORMATION STATEMENT... WIDESPREAD SPOTTER ACTIVATION IS NOT ANTICIPATED, HOWEVER INDIVIDUAL SPOTTER ARE ENCOURAGED TO REPORT FLOODING TO THE NATIONAL WEATHER SERVICE IN SAN JUAN. AMZ715-725-VIZ001-002-230915- ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX- NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS- 504 AM AST MON JUN 22 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE U.S. VIRGIN ISLANDS AND THE ADJACENT COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT .THUNDERSTORMS...THERE IS A CHANCE OF THUNDERSTORMS WITH HEAVY RAINFALL AND BRIEF GUSTY WINDS THIS AFTERNOON ACROSS PORTIONS OF THE U.S. VIRGIN ISLANDS AND SURROUNDING WATERS. .FLOODING...HEAVY RAINS COULD LEAD TO URBAN AND SMALL STREAM FLOODING. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY A TROPICAL WAVE IS EXPECTED TO CREATE PERIODS OF SHOWERS AND THUNDERSTORMS THROUGH EARLY TUESDAY MORNING. URBAN AND SMALL STREAM FLOODING IS POSSIBLE WITH THE HEAVIEST SHOWERS. .SPOTTER INFORMATION STATEMENT... WIDESPREAD SPOTTER ACTIVATION IS NOT ANTICIPATED, HOWEVER INDIVIDUAL SPOTTER ARE ENCOURAGED TO REPORT FLOODING TO THE NATIONAL WEATHER SERVICE IN SAN JUAN.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
1153 AM AST MON JUN 22 2015
VIZ002-221645-
ST CROIX-
1153 AM AST MON JUN 22 2015
...A CLUSTER OF SHOWERS WITH THUNDERSTORMS WILL AFFECT SAINT
CROIX...
AT 1150 AM AST...A CLUSTER OF STRONG THUNDERSTORMS WERE APPROACHING
THE ISLAND OF SAINT CROIX IN THE U.S. VIRGIN ISLANDS.
WINDS IN EXCESS OF 30 MPH ARE POSSIBLE WITH THESE STORMS.
LOCATIONS IMPACTED INCLUDE...
GROVE PLACE...FREDERIKSTED SOUTH...CHRISTIANSTED AND FREDERIKSTED.
EXCESIVE CLOUD TO GROUND LIGHTNING STRIKES ARE OCCURRING WITH THESE
STORMS. LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK
A SAFE SHELTER INSIDE A BUILDING OR VEHICLE.
LAT...LON 1771 6488 1775 6489 1777 6488 1776 6483
1778 6475 1775 6470 1777 6467 1776 6463
1779 6463 1779 6461 1778 6462 1772 6464
1771 6467 1769 6475 1770 6476 1768 6476
1770 6478 1768 6490
TIME...MOT...LOC 1550Z 180DEG 0KT 1773 6475
FCSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
1240 PM AST MON JUN 22 2015
PRZ013-221730-
VIEQUES-
1240 PM AST MON JUN 22 2015
...STRONG THUNDERSTORMS WILL AFFECT VIEQUES MUNICIPALITY...
AT 1237 PM AST...A CLUSTER OF SHOWERS AND STRONG THUNDERSTORMS ARE
EXPECTED TO AFFECT VIEQUES.
WIND GUSTS OF 40 MPH ARE POSSIBLE WITH THESE STORMS.
FREQUENT CLOUD TO GROUND LIGHTNING STRIKES ARE OCCURRING WITH THESE
STORMS. LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK
A SAFE SHELTER INSIDE A BUILDING OR VEHICLE.
LAT...LON 1815 6529 1813 6527 1813 6531 1812 6531
1811 6535 1812 6534 1813 6536 1811 6538
1811 6543 1809 6542 1811 6545 1809 6544
1810 6546 1809 6547 1809 6549 1808 6555
1810 6558 1812 6557 1816 6540
TIME...MOT...LOC 1637Z 000DEG 0KT 1813 6541
FCCOMUNICADO ESPECIAL SOBRE LAS CONDICIONES DEL TIEMPO SERVICIO NACIONAL DE METEOROLOGIA SAN JUAN PR 1240 PM AST LUNES 22 DE JUNIO DE 2015 PRZ013-221730- VIEQUES- 1240 PM AST LUNES 22 DE JUNIO DE 2015 ...TRONADAS FUERTES AFECTARAN A VIEQUES... A LAS 12:37 PM AST...UN GRUPO DE AGUACEROS Y TRONADAS DEBE AFECTAR EL AREA DE VIEQUES. VIENTOS EN RAFAGAS HASTA DE 40 MPH SERAN POSIBLES CON ESTAS TRONADAS. RAYOS FRECUENTES DE NUBE A SUELO ESTAN OCURRIENDO CON ESTAS TORMENTAS. LOS RAYOS PUEDEN CAER A 15 MILLAS DE UNA TRONADA. BUSQUE REFUGIO DENTRO DE UNA ESTRUCTURA FUERTE. FC/RVT
The San Juan radar (TJUA), 41 km away, was scanning. The volume nearest the first event began at 17:30 UTC.
8 thunderstorm wind, 3 hail, 1 strong wind. Local standard time, as filed.
Pea size hail was reported in Villalba.
Small hail was reported in Lares.
A wind gust of 48 mph was reported at Luis Munoz Marin International Airport.
Power line downed at Ave Inturregui near Falas store.
Downed trees and power lines were reported at Roosevelt Avenue, Ponce de Leon, De Diego Avenues and near Colegio Universitario in Hator Rey sector.
Downed trees ar Road PR 167 near Jose Antonio Davila school. at Volcan street in Hato Tejas sector and at road PR 167, Km 18.4. Power lines were downed at Reparto Teresita, Road 38.
Fallen tree in Barrio Collores at road PR 921 in Las Piedras.
Power line blocking a street at Los Frailes near Camino Alejandrino. Downed tree at Garden Hill sur street Palma sola A12.
Power lines downed at road 165 near Campomar and Parcelas Sabana Seca.
Downed tree at road 677 km 6.3 near Barrio Maricao, sector Los Cruz.
Marble size hail reported via twitter.
More than 12 downed trees were reported in this municipality. Main roads 109 and 119 were blocked by trees.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Puerto Rico in 2015Every state in 2015This day in weather historyWarnings in Puerto Rico, June 2015
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: 591777, 591778, 591779, 591781, 591782, 591784, 591780, 591838, 591839, 591840, 591841, 591842.