Available moisture combined with isolated thunderstorms over the western interior and northwest sections of Puerto Rico.
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.
Available moisture combined with isolated thunderstorms over the western interior and northwest sections of Puerto Rico.
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 Aug 22, 3:24 PM AST, 33 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN JUAN PR 324 PM AST SAT AUG 22 2015 .DISCUSSION...MODERATE MOISTURE PASSING OVER PR ATTM WITH DRYING ALREADY OCCURRING IN EAST. CURRENT SHOWERS/STORMS OVER THE ISLAND WILL LIKELY CONTINUE TIL LATE AFTERNOON. VERY DRY AIR OVER REGION TONIGHT WITH ISOLATED BRIEF SHOWERS AT MOST THEN A LITTLE MOISTURE AGAIN SUNDAY. HURRICANE DANNY BEHAVING ESSENTIALLY AS FORECAST WITH SATELLITE INDICATING WEAKENING IS ONGOING TODAY THOUGH HURRICANE HUNTERS ON SITE NOW. HOWEVER IT IS STILL DANGEROUS. VERY SMALL AREAL EXTENT OF DANNY MAKES THE EXACT TRACK DIFFICULT TO ASSESS IMPACTS. DRY AIR ENTRAINMENT ON ALL SIDES OF THE HURRICANE EXCEPT EAST/ SOUTHEAST ALONG WITH VERTICAL WIND SHEAR SUGGEST WEAKENING WILL CONTINUE AND WILL NOT GROW IN SIZE EITHER. RAISED PROBABILITY OF RAIN FOR MUCH OF AREA NEXT SEVERAL DAYS GIVEN THE MOISTURE COMING. ANOTHER LARGER AREA OF MOISTURE A COUPLE DAYS OR SO FOLLOWING DANNY GIVES A LITTLE BETTER...THOUGH STILL CAUTIOUS...CONFIDENCE IN DECENT RAINFALL THIS WEEK. && .AVIATION...SHRA/TSRA OVR PR WI OBSCD MTNS TO DIMINISH LATE AFT. VFR EARLY EVE AND THRU TONITE WI ISOLD SHRA. SHRA/TSRA AGAIN SUNDAY AFTER CNTRL/W PR WI OBSCD MTNS. WIND BLW FL100 MAINLY E 7-17 KT THRU SUNDAY. && .MARINE...LIGHT TO MODERATE TRADE TO CONTINUE INTO SUNDAY WITH RATHER LOW SEAS. WITH DANNY APPROACHING CONDITIONS CONDITIONS ARE EXPECTED TO DETERIORATE WITH POSSIBLE TROPICAL STORM CONDITIONS NEAR USVI LATE MON. && .PRELIMINARY POINT TEMPS/POPS... SJU 77 90 80 88 / 10 20 30 40 STT 79 89 79 88 / 20 20 40 40 && .SJU WATCHES/WARNINGS/ADVISORIES... PR...NONE. VI...NONE. AM...NONE. && 15/54
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN JUAN PR 627 AM AST SAT AUG 22 2015 AMZ710>745-PRZ001>013-231030- 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- 627 AM AST SAT AUG 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 ACROSS PORTIONS OF NORTH CENTRAL...NORTHWEST AND WEST PUERTO RICO THIS AFTERNOON. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY HURRICANE DANNY IS EXPECTED TO PASS CLOSE TO OR THROUGH THE AREA MONDAY NIGHT INTO TUESDAY. STRONG WINDS AND HEAVY RAINS WITH FLOODING ARE POSSIBLE...BUT WILL DEPEND HEAVILY ON THE EXACT TRACK AND INTENSITY OF THE SYSTEM WHEN IT ARRIVES. RESIDENTS WILL LIKELY BEGIN TO FEEL THE EFFECTS OF DANNY MONDAY AFTERNOON. ENHANCED RAINFALL IS ALSO EXPECTED ON WEDNESDAY FROM THE APPROACH OF ANOTHER TROPICAL WAVE. .SPOTTER INFORMATION STATEMENT... SPOTTER ARE ENCOURAGED TO REPORT FLOODING TO THE NATIONAL WEATHER SERVICE IN SAN JUAN. AMZ715-725-VIZ001-002-231030- ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX- NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS- 627 AM AST SAT AUG 22 2015 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. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY HURRICANE DANNY IS EXPECTED TO PASS CLOSE TO OR THROUGH THE AREA MONDAY NIGHT INTO TUESDAY. STRONG WINDS AND HEAVY RAINS WITH FLOODING ARE POSSIBLE...BUT WILL DEPEND HEAVILY ON THE EXACT TRACK AND INTENSITY OF THE SYSTEM WHEN IT ARRIVES. RESIDENTS WILL LIKELY BEGIN TO FEEL THE EFFECTS OF DANNY MONDAY AFTERNOON. ENHANCED RAINFALL IS ALSO EXPECTED ON WEDNESDAY FROM THE APPROACH OF ANOTHER TROPICAL WAVE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
1252 PM AST SAT AUG 22 2015
PRZ010-011-221845-
SOUTHWEST-MAYAGUEZ AND VICINITY-
1252 PM AST SAT AUG 22 2015
...A STRONG THUNDERSTORM WILL AFFECT PORTIONS OF SAN GERMAN...CABO
ROJO...HORMIGUEROS AND MAYAGUEZ MUNICIPALITIES...
AT 1250 PM AST...A STRONG THUNDERSTORM WAS OVER CABO ROJO. THE STORM
WAS NEARLY STATIONARY. WINDS IN EXCESS OF 30 MPH ARE POSSIBLE WITH
THIS STORM. TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS
STORM...AND MAY CAUSE LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE
THROUGH FLOODED ROADWAYS.
FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.
LAT...LON 1824 6706 1810 6707 1802 6717 1803 6719
1803 6721 1806 6720 1807 6718 1807 6720
1809 6720 1811 6718 1817 6718 1821 6715
TIME...MOT...LOC 1650Z 180DEG 0KT 1811 6714
CAMCOMUNICADO ESPECIAL SOBRE LAS CONDICIONES DEL TIEMPO SERVICIO NACIONAL DE METEOROLOGIA SAN JUAN PR 1252 PM AST SABADO 22 DE AGOSTO DE 2015 PRZ010-011-221845- SUROESTE-MAYAGUEZ Y VECINDAD- 1258 PM AST SABADO 22 DE AGOSTO DE 2015 ...UNA TRONADA FUERTE AFECTARA LOS MUNICIPIOS DE SAN GERMAN...CABO ROJO...HORMIGUEROS Y MAYAGUEZ... A LAS 12:50 PM AST...UNA TRONADA FUERTE ESTABA LOCALIZADA SOBRE CABO ROJO. LA TORMENTA ESTABA CASI ESTACIONARIA. SE ESPERAN VIENTOS EN EXCESO DE 30 MPH CON ESTA TORMENTA. LLUVIA ADICIONAL TAMBIEN ESTAN OCURRIENDO CON ESTA TORMENTA...Y PUDIERA CAUSAR INUNDACIONES. NUNCA MANEJE SU VEHICULO EN CARRETERAS INUNDADAS. RAYOS FRECUENTES DE NUBE A SUELO ESTAN OCURRIENDO CON ESTA TORMENTA. LOS RAYOS PUEDEN CAER A 15 MILLAS DE LA TRONADA. BUSQUE REFUGIO SEGURO DENTRO DE UN VEHICULO O EDIFICIO. CAM/RVT
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN JUAN PR 114 PM AST SAT AUG 22 2015 PRZ005-006-009-221815- NORTH CENTRAL-CENTRAL INTERIOR-WESTERN INTERIOR- 114 PM AST SAT AUG 22 2015 ...A STRONG THUNDERSTORM WILL AFFECT UTUADO...AND CIALES MUNICIPALITIES... AT 112 PM AST...A STRONG THUNDERSTORM WAS NEAR CIALES. THE STORM WAS NEARLY STATIONARY. THIS STORM WILL REMAIN OVER MAINLY RURAL AREAS. TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY CAUSE LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS. FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE SHELTER INSIDE A BUILDING OR VEHICLE. LAT...LON 1830 6647 1825 6646 1824 6661 1836 6661 TIME...MOT...LOC 1712Z 120DEG 3KT 1829 6653 CAM
COMUNICADO ESPECIAL SOBRE LAS CONDICIONES DEL TIEMPO SERVICIO NACIONAL DE METEOROLOGIA SAN JUAN PR 114 PM AST SABADO 22 DE AGOSTO DE 2015 PRZ005-006-009-221815- NORTE CENTRAL-INTERIOR CENTRAL-OESTE INTERIOR- 114 PM AST SABADO 22 DE AGOSTO DE 2015 ...UNA TRONADA FUERTE AFECTARA LOS MUNICIPIOS DE UTUADO Y CIALES... A LA 1:12 PM AST...UNA TRONADA FUERTE ESTABA LOCALIZADA SOBRE CIALES. LA TORMENTA ESTABA CASI ESTACIONARIA. ESTA TORMENTA PERMANECERA MAYORMENTE SOBRE LAS AREAS RURALES. LLUVIA TORRENCIAL TAMBIEN OCURRE CON ESTAS TORMENTAS...Y PUDIERA CAUSAR INUNDACIONES LOCALIZADAS. NUNCA MANEJE SU VEHICULO EN CARRETERAS INUNDADAS. RAYOS FRECUENTES DE NUBE A SUELO ESTAN OCURRIENDO CON ESTA TORMENTA. LOS RAYOS PUEDEN CAER A 15 MILLAS DE LA TRONADA. BUSQUE REFUGIO SEGURO DENTRO DE UN VEHICULO O EDIFICIO. CAM/RVT
The San Juan radar (TJUA), 100 km away, was scanning. The volume nearest the first event began at 19:55 UTC.
3 flash flood. Local standard time, as filed.
PR Emergency management agency reported that road 125 in San Sebasti n was flooded. R o Culebrinas was out of its banks.
PR emergency management agency reported that road 119 in San Sebastian was flooded. Rio Culebrinas was out of its banks.
Three residences were affected at Urbanizacion El Culebrinas by flooded waters in San Sebastian.
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, August 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: 599782, 599783, 599784.