Numerous showers and isolated thunderstorms developed over the western half of PR during the afternoon hours. Isolated areas of 2 to 3 inches of rainfall were observed over some areas.
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.
Numerous showers and isolated thunderstorms developed over the western half of PR during the afternoon hours. Isolated areas of 2 to 3 inches of rainfall were observed over some areas. Low pressure centered to the northeast of Culebra extended a trough southwest over the local area producing areas of showers and 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 Sep 24, 11:00 AM AST, 2 hours 32 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN JUAN PR 1100 AM AST WED SEP 24 2014 .UPDATE...SATELLITE IMAGERY SHOWS CIRRUS CLOUDS MOVING SOUTHWARD ACROSS THE LOCAL REGION TODAY. THESE CIRRUS CLOUDS HAVE MAINTAINED VARIABLY CLOUDY SKIES ACROSS MOST OF ISLANDS THIS MORNING. IN ADDITION...SHOWERS EMBEDDED IN THE EASTERLY TRADES HAVE MOVED INLAND ACROSS PORTIONS OF THE USVI...CULEBRA...VIEQUES AND EASTERN PR...PRODUCING BRIEF PERIODS OF LIGHT TO MODERATE RAINFALL. RAINFALL ACCUMULATIONS ASSOCIATED WITH THESE MORNING SHOWERS HAVE GENERALLY RANGED BETWEEN A FEW HUNDREDTHS AND TWO TENTHS OF AN INCH SO FAR THIS MORNING. TJSJ 12Z SOUNDING CAME IN FAIRLY WET WITH PRECIPITABLE WATER NEAR 2 INCHES. THIS HIGH MOISTURE CONTENT COMBINED WITH A RELATIVE UNSTABLE ATMOSPHERE WILL PRODUCE SHOWERS AND THUNDERSTORMS ACROSS CENTRAL AND WESTERN PR THIS AFTERNOON. PERIODS OF HEAVY RAINFALL AND LOCALIZED URBAN FLOODING ARE POSSIBLE THIS AFTERNOON...ESPECIALLY ACROSS WESTERN PR. && .AVIATION...MVFR/IFR CONDS AND MOUNTAIN OBSCURATIONS LIKELY IN AND AROUND TJMZ BETWEEN 17Z-21Z. VCSH/VCTS ALSO POSSIBLE NEAR TJPS IN THE AFTERNOON. LLVL E WINDS OF 10-15 KT CAN BE EXPECTED THRU THE FORECAST PERIOD. GUSTY WINDS LIKELY NEAR TSRA. && .MARINE...SEAS OF 2-4 FT EXPECTED OVER THE NEXT FEW DAYS. HOWEVER... BOATERS SHOULD AVOID AREAS OF THUNDERSTORMS. && .PREV DISCUSSION... /ISSUED 527 AM AST WED SEP 24 2014/ SYNOPSIS...AT MID AND UPPER LEVELS...LOW PRESSURE CENTERED 730 MILES NORTHEAST OF CULEBRA WILL EXTEND A TROUGH SOUTHWEST OVER THE LOCAL AREA TONIGHT THROUGH FRIDAY. THE TROUGH WILL WEAKEN BUT REMAIN IN THE LOCAL AREA THROUGH MONDAY. HIGH PRESSURE MOVES INTO THE CARIBBEAN FROM THE TROPICAL ATLANTIC EARLY NEXT WEEK. AT LOWER LEVELS...HIGH PRESSURE IN THE NORTH CENTRAL ATLANTIC WILL BE JOINED BY ANOTHER HIGH FROM THE WEST ON THURSDAY WHILE LOW PRESSURE DOMINATES THE SOUTHERN AND WESTERN CARIBBEAN. HIGH PRESSURE WILL FADE THURSDAY THROUGH SUNDAY AND GRADIENTS WILL RELAX DURING THAT TIME. NEXT WEEK HIGH PRESSURE REBUILDS IN THE NORTHEAST CENTRAL ATLANTIC AND EXTENDS INTO THE CARIBBEAN CREATING MODERATE EAST SOUTHEASTERLY TRADE WINDS. MOIST...UNSTABLE CONDITIONS WILL PREVAIL BUT LESSEN TODAY THROUGH FRIDAY ONLY TO PEAK AGAIN OVER THE WEEKEND. DISCUSSION...SHOWERS INCREASED OVERNIGHT OVER MOST OF THE WATERS NOT IN THE WESTERN SHADOW OF PUERTO RICO WITH SOME BRIEF HEAVY SHOWERS MOVING ONSHORE IN EASTERN AND SOUTHEASTERN PUERTO RICO. AMOUNTS OF UP TO THREE QUARTERS OF AN INCH WERE OBSERVED ON RADAR. THE GFS WAS GENERALLY DRIER THAN THE NAM5 TODAY THROUGH MUCH OF THE NEXT 5 DAYS AND CURRENT FORECAST OUT 5 DAYS REPRESENTS THE NAM5 TEMPERED BY THE GFS AND PREVIOUS FORECASTS. NEVERTHELESS RAIN IS LIKELY ACROSS MUCH OF THE FORECAST AREA TODAY AND ACROSS SOUTHWEST PUERTO RICO TOMORROW. PRECIPITABLE WATER AND LOWER LEVEL RELATIVE HUMIDITIES DIMINISH TODAY THROUGH FRIDAY...BUT EVEN AT LOW EBB PRECIPITABLE WATER VALUES ONLY DROP TO 1.70 INCHES BEFORE SPIKING BACK UP TO NEAR 2 INCHES BOTH SATURDAY AND SUNDAY AFTERNOONS. THIS MOISTURE WILL COMBINE WITH THE INFLUENCES OF AN UPPER LEVEL LOW PRESSURE SPREADING ACROSS THE AREA THURSDAY THROUGH SUNDAY TO SPAWN INCREASINGLY FREQUENT THUNDERSTORMS ACROSS THE AREA. THE GFS SHOWS 500 MB TEMPERATURES DROPPING FROM AROUND MINUS 5 DEGREES TODAY TO MINUS 8 DEGREES SUNDAY NIGHT WITH A CORRESPONDING DROP IN THE LIFTED INDEX FROM MINUS 4 DEGREES TO MINUS 8 DEGREES. WOULD EXPECT SHOWERS AND THUNDERSTORMS TO BECOME MORE INTENSE OVER THE WEEKEND AND INTO EARLY NEXT WEEK. WITH THE FREEZING LEVEL STILL FAIRLY HIGH ON SATURDAY...14.5 KFT...AND RISING FROM THEN ON...WOULD EXPECT SOME SMALL HAIL OCCURRENCES AND STRONG THUNDERSTORMS WINDS OVER THE WEEKEND AND INTO EARLY NEXT WEEK...MAINLY INTERIOR PUERTO RICO. THE U.S. VIRGIN ISLANDS WILL SEE AN INCREASE OF SHOWERS OVER THE WEEKEND BUT AMOUNTS SHOULD BE MODERATE...BUT IN PUERTO RICO TODAY THROUGH TUESDAY THUNDERSTORMS MAY PRODUCE LOCALIZED URBAN AND SMALL STREAM FLOODING. WIDESPREAD FLOODING OR FLOODING OF LARGE RIVERS IS NOT ANTICIPATED TODAY THROUGH FRIDAY. LOW LEVEL WINDS DECREASE THROUGH SATURDAY AND WILL MAKE UP FOR THE LESSENING MOISTURE LEVELS IN THE AMOUNT OF RAIN THAT CAN FALL IN ANY ONE PLACE. AVIATION...THROUGH THE MORNING HOURS...PASSING -SHRA CREATING VCSH WITH POSSIBLE BRIEF MVFR CIGS AT TIST/TISX AND TJSJ. BETWEEN 24/16Z-21Z...SHRA/TSRA CREATING MVFR CONDS AND MOUNTAIN OBSCURATIONS OVER THE WESTERN INTERIOR OF PR AFFECTING MAINLY TJMZ/TJBQ. VCSH/VCTS ARE ALSO POSSIBLE WITH MOUNTAIN OBSCURATIONS NEAR TJSJ/TJPS IN THE AFTERNOON. LOW LEVEL WINDS FROM THE EAST AT 10-15 KT WITH SEA BREEZE VARIATIONS. TOPS BEFORE DAWN WERE UP TO 38 KFT SOUTH OF PUERTO RICO BUT LESS THEN 30 KFT AROUND THE ISLAND EAST AND NORTH. MARINE...CONDITIONS REMAIN RELATIVELY TRANQUIL THROUGH THE NEXT 7 DAYS WITH SEAS GENERALLY 4 FEET OR LESS. && .PRELIMINARY POINT TEMPS/POPS... SJU 88 79 87 79 / 50 70 50 50 STT 88 78 88 79 / 40 70 40 60 && .SJU WATCHES/WARNINGS/ADVISORIES... PR...NONE. VI...NONE. COASTAL WATERS...NONE. && 11/64
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN JUAN PR 939 AM AST WED SEP 24 2014 AMZ710>745-PRZ001>013-251000- 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- 939 AM AST WED SEP 24 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PUERTO RICO AND THE ADJACENT ATLANTIC COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED MAINLY OVER MAYAGUEZ AND VICINITY. LOCALLY HEAVY RAINFALL AND STRONG GUSTY WINDS ARE POSSIBLE WITH THE HEAVIER STORMS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY A TROPICAL WAVE ALONG 51W LONGITUDE IS EXPECTED TO MOVE ACROSS THE AREA FRIDAY NIGHT. AT THE SAME TIME...AN UPPER LEVEL LOW NORTHEAST OF THE AREA IS TO GRADUALLY STRETCH TO THE WEST SOUTHWEST ACROSS THE LOCAL AREA. AS THE TROUGH AMPLIFIES...EXPECT PERIODS OF HEAVY RAINFALL TO DEVELOP DURING THE WEEKEND ESPECIALLY ON SATURDAY. THE STEERING FLOW WILL ALSO BE QUITE WEAK SUGGESTING THUNDERSTORMS WILL MOVE VERY SLOWLY. THE DEGREE OF INSTABILITY...FORCING AND EXPECTED SLOW MOTION OF THUNDERSTORMS SUGGEST THAT SIGNIFICANT RAINFALL AMOUNTS ARE POSSIBLE DURING THE WEEKEND ESPECIALLY ON SATURDAY. A FLASH FLOOD WATCH MAY BE REQUIRED ON FRIDAY IF CURRENT MODEL TRENDS HOLD. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. AMZ715-725-VIZ001-002-251000- ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX- NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS- 939 AM AST WED SEP 24 2014 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...THURSDAY THROUGH TUESDAY A TROPICAL WAVE ALONG 51W LONGITUDE IS EXPECTED TO MOVE ACROSS THE AREA FRIDAY NIGHT. AT THE SAME TIME...AN UPPER LEVEL LOW NORTHEAST OF THE AREA IS TO GRADUALLY STRETCH TO THE WEST SOUTHWEST ACROSS THE LOCAL AREA. AS THE TROUGH AMPLIFIES...EXPECT PERIODS OF HEAVY RAINFALL TO DEVELOP DURING THE WEEKEND ESPECIALLY ON SATURDAY. THE STEERING FLOW WILL ALSO BE QUITE WEAK SUGGESTING THUNDERSTORMS WILL MOVE VERY SLOWLY. THE DEGREE OF INSTABILITY...FORCING AND EXPECTED SLOW MOTION OF THUNDERSTORMS SUGGEST THAT SIGNIFICANT RAINFALL AMOUNTS ARE POSSIBLE DURING THE WEEKEND ESPECIALLY ON SATURDAY. A FLASH FLOOD WATCH MAY BE REQUIRED ON FRIDAY IF CURRENT MODEL TRENDS HOLD. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
The San Juan radar (TJUA), 120 km away, was scanning. The volume nearest the first event began at 17:32 UTC.
1 thunderstorm wind. Local standard time, as filed.
Thunderstorm winds affected 6 houses at Barrio Tablonal,Las Flores community, at Road PR-115. Zinc roof were blown out in 4 houses.
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: 543861.