Strong thunderstorms with heavy rain and intense lightning developed across the western portion of PR as a tropical wave continued to move west and out of the local area.
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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.
Strong thunderstorms with heavy rain and intense lightning developed across the western portion of PR as a tropical wave continued to move west and out of the local area.
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 Sep 5, 11:04 AM AST, 3 hours 51 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN JUAN PR 1104 AM AST FRI SEP 5 2014 .UPDATE...TROPICAL WAVE AXIS NOW SOUTH OF HISPANIOLA/MONA PASSAGE WITH SOME TRAILING MOISTURE BEING LIFTED ACROSS THE REGION IN THE PREVAILING EAST TO SOUTHEAST LOW LEVEL WIND FLOW. LATEST TJSJ 05/12Z SOUNDING AS WELL AS BLENDED TPW SHOWED PWAT VALUES STILL AROUND 2.0 INCHES OR SO....WHILE TO THE EAST TKPK AND MACM SOUNDING SHOWED GRADUAL DECLINE IN PRECIPITABLE WATER VALUES NOW BETWEEN 1.6-1.80 INCHES SUGGESTING DRIER AIR FILTERING FROM THE EAST. STILL EXPECT THE COMBINATION OF AVAILABLE MOISTURE LOCALIZED CONVERGENCE...DIURNAL HEATING AND LOCAL TERRAIN...WILL GIVE WAY TO AFTERNOON CONVECTION ACROSS THE ISLANDS ESPECIALLY OVER PARTS OF THE WEST INTERIOR AND NORTHWEST SECTIONS OF PUERTO RICO. SOME OF THE SHOWERS AND STORMS MAY PRODUCE PERIODS OF LOCALLY HEAVY DOWNPOURS...WHICH COULD LEAD TO MINOR FLOODING INCONVENIENCES IN IN URBAN AREAS AS WELL AS ALONG SMALL STREAMS AND IN POOR DRAINAGE AREAS. MINOR ADJUSTMENTS WERE MADE TO THE INHERITED SHORT TERM FORECAST BASED ON PRESENT AND EXPECTED WEATHER CONDITIONS FOR THE AFTERNOON AND EVENING HOURS. && .AVIATION UPDATE...NO CHNG TO PREVIOUS AVN DISCUSSION.SO FAR VFR CONDS ACROSS LCL FLYING AREA. SCT CLD LYRS BTW FL020-FL050...SOME HIGH LVL CIRRUS AND CONVECTIVE DEBRIS CLDS BTW FL250-FL300 BEING TRANSPORTED SW ACROSS THE REGION...AND EXPECTED TO INCR TO SCT-BKN LYR DURG THE AFTN W PSBL MDT CONVECT TURB N OF PR W/ISOLD TSRA.L/LVL WND FM E-SE 10-15 KTS BLO FL150...THEN BACKING AND BCMG FM NW ABV TO WND MAX OF AROUND 60-65 KTS NR FL450. && .MARINE UPDATE...LOCAL WINDS AND SEAS CONTINUED AT LESS THAN 5 FEET OVER MOST OF THE COASTAL WATERS...WITH WINDS OF 17 KNOTS OR LESS. NO CHANGE EXPECTED FOR THE AFTERNOON AND EVENING HOURS WITH OVERALL LIGHT TO MODERATE SEAS SO FAR EXPECTED FOR THE UPCOMING WEEKEND. && .PREV DISCUSSION... /ISSUED 613 AM AST FRI SEP 5 2014/ SYNOPSIS...RIDGE ALOFT WILL CONTINUE TO ERODE AS TUTT ACROSS THE CENTRAL ATLANTIC AMPLIFIES INTO THE NORTH AND EAST CARIBBEAN. AT LOW LEVELS...TROPICAL WAVE WILL CONTINUE TO MOVE ACROSS THE EASTERN CARIBBEAN THIS MORNING WITH NEXT TROPICAL WAVE PASSAGE EXPECTED ON SUNDAY. DISCUSSION...SCATTERED TO NUMEROUS SHOWERS WERE NOTED OVER THE SURROUNDING WATERS OVERNIGHT. SOME SHOWERS AFFECTED THE U.S VIRGIN ISLANDS AND EASTERN PUERTO RICO...INCLUDING VIEQUES. A TROPICAL WAVE MOVING ACROSS THE AREA...WILL CONTINUE TO MOVE WEST AND WILL MAINTAIN ACTIVE WEATHER MAINLY OVER THE CARIBBEAN WATERS. FOR THIS AFTERNOON...MOISTURE ASSOCIATED WITH THIS WAVE...COMBINED WITH DAYTIME HEATING AND LOCAL EFFECTS WILL PRODUCE SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS OVER THE LOCAL REGION MAINLY DURING THE AFTERNOON HOURS. AFTER THE PASSAGE OF THIS WAVE...A SLIGHTLY DRIER AIR MASS WILL ENCOMPASS THE LOCAL REGION SATURDAY. HOWEVER...LINGERING MOISTURE WILL AID IN THE DEVELOPMENT OF SHOWERS WITH ISOLATED THUNDERSTORMS MAINLY OVER THE WESTERN INTERIOR. IN THE LONG TERM...A TROPICAL WAVE LOCATED OVER THE FAR EASTERN ATLANTIC WILL CONTINUE TO MOVE WEST DURING THE NEXT SEVERAL DAYS. THIS WAVE IS EXPECTED TO APPROACH THE NORTHEAST CARIBBEAN BY THE END OF THE NEXT WEEK. AVIATION...TROPICAL WAVE ACROSS THE LOCAL REGION WILL CONTINUE TO BRING SHRA/TSRA ACROSS THE FLYING AREA THRU LATE TONIGHT. SHRA WILL MOVE ACROSS PR/USVI AS THE DAY PROGRESSES...RESULTING IN POSSIBLY BRIEF MVFR CONDS IN THE PR/USVI TERMINALS. AFTERNOON SHRA/TSRA ACTIVITY EXPECTED ACROSS WESTERN SECTIONS OF PUERTO RICO. THEREFORE...MOUNTAIN OBSCURATIONS AND TEMPO MVFR/IFR CONDS ARE LIKELY BTWN 05/17-21Z ACROSS WEST PR. E-ESE WIND FLOW OF 15-20 KT EXPECTED BELOW FL200. MARINE...SEAS UP TO 5 FEET AND WINDS UP TO 17 KNOTS ARE EXPECTED OVER THE COASTAL WATERS. && .PRELIMINARY POINT TEMPS/POPS... SJU 87 78 88 79 / 50 20 20 20 STT 88 79 89 80 / 50 30 30 20 && .SJU WATCHES/WARNINGS/ADVISORIES... PR...NONE. VI...NONE. COASTAL WATERS...NONE. && 09/25
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN JUAN PR 632 AM AST FRI SEP 5 2014 AMZ710>745-PRZ001>013-061045- 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- 632 AM AST FRI SEP 5 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PUERTO RICO AND THE ADJACENT ATLANTIC COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT A TROPICAL WAVE WILL CONTINUE TO MOVE WESTWARD ACROSS THE LOCAL REGION TODAY. VARIABLY TO MOSTLY CLOUDY SKIES AS WELL AS SHOWERS AND ISOLATED THUNDERSTORMS WITH LOCALLY HEAVY RAINFALL CAN BE EXPECTED WITH THIS WAVE. URBAN AND SMALL STREAM FLOODING IS POSSIBLE ACROSS PORTIONS OF THE ISLANDS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY ANOTHER TROPICAL WAVE WILL REACH THE ISLANDS ON SUNDAY. MOISTURE WILL LINGER ACROSS THE REGION THROUGH AT LEAST MONDAY. LOCALIZED FLOODING IN URBAN AREAS AND SMALL STREAMS IS ALSO POSSIBLE WITH THIS WAVE. .SPOTTER INFORMATION STATEMENT... REPORTS OF FLOODING WOULD BE GREATLY APPRECIATED. AMZ715-725-VIZ001-002-061045- ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX- NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS- 632 AM AST FRI SEP 5 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE U.S. VIRGIN ISLANDS AND THE ADJACENT COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT A TROPICAL WAVE WILL CONTINUE TO MOVE WESTWARD ACROSS THE LOCAL REGION TODAY. VARIABLY TO MOSTLY CLOUDY SKIES AS WELL AS SHOWERS AND ISOLATED THUNDERSTORMS WITH LOCALLY HEAVY RAINFALL CAN BE EXPECTED WITH THIS WAVE. URBAN AND SMALL STREAM FLOODING IS POSSIBLE ACROSS PORTIONS OF THE ISLANDS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY ANOTHER TROPICAL WAVE WILL REACH THE ISLANDS ON SUNDAY. MOISTURE WILL LINGER ACROSS THE REGION THROUGH AT LEAST MONDAY. LOCALIZED FLOODING IN URBAN AREAS AND SMALL STREAMS IS ALSO POSSIBLE WITH THIS WAVE. .SPOTTER INFORMATION STATEMENT... REPORTS OF FLOODING WOULD BE GREATLY APPRECIATED.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN JUAN PR 240 PM AST FRI SEP 5 2014 PRC011-083-093-097-051930- ANASCO PR-MAYAGUEZ PR-MARICAO PR-LAS MARIAS PR- 240 PM AST FRI SEP 5 2014 AT 236 PM AST...NATIONAL WEATHER SERVICE METEOROLOGIST DETECTED A STRONG THUNDERSTORM OVER ANASCO AND LAS MARIAS...MOVING WEST AT 10 MPH. THIS THUNDERSTORM IS PRODUCING INTENSE LIGHTNING...HEAVY RAIN AND STRONG GUSTY WINDS. IN ADDITION...SMALL HAIL COULD BE OBSERVED WITH THIS STORM. INTENSE LIGHTNING IS REPORTED WITH THIS STORM. IF OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES. JJA
COMUNICADO ESPECIAL SOBRE LAS CONDICIONES DEL TIEMPO SERVICIO NACIONAL DE METEOROLOGIA SAN JUAN PR 240 PM AST VIERNES 5 DE SEPTIEMBRE DE 2014 PRC011-083-093-097-051930- ANASCO PR-MAYAGUEZ PR-MARICAO PR-LAS MARIAS PR- 240 PM AST VIERNES 5 DE SEPTIEMBRE DE 2014 A LAS 2:36 PM AST...METEOROLOGOS DEL SERVICIO NACIONAL DE METEOROLOGIA DETECTARON TRONADAS FUERTES SOBRE ANASCO Y LAS MARIAS...MOVIENDOSE HACIA EL OESTE A 10 MPH. ESTA TRONADA ESTA PRODUCIENDO RAYOS INTENSOS...LLUVIAUFERTE Y VIENTOS FUERTES EN RAFAGAS. ADEMAS...PUDIERA OBSERVARSE GRANIZO PEQUENO CON ESTA TORMENTA. RAYOS INTENSOS HAN SIDO REPORTADOS CON ESTA TORMENTA. SI SE ENCUENTRA EN EL EXTERIOR...MANTENGASE ALEJADO DE OBJETOS ALTOS COMO LOS ARBOLES. MUEVASE AL INTERIOR DE SER POSIBLE. DE ENCONTRARSE EN UN LUGAR SEGURO MANTENGASE ALEJADO DE PUERTAS Y VENTANAS Y EVITE USAR LOS TELEFONOS SALVO EN CASO DE EMERGENCIA. JJA/RVT
The San Juan radar (TJUA), 110 km away, was scanning. The volume nearest the first event began at 18:52 UTC.
1 thunderstorm wind. Local standard time, as filed.
Tree branches were downed between roads PR-105 and PR-106 at Barrio Limon.
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, September 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: 540937.