A low level disturbance moving across the eastern Caribbean induced by an upper level low pressure, brought ample amounts of tropical moisture across the region. This combined with fairly unstable upper atmospheric conditions induced convection which produced heavy rain across the central interior 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.
A low level disturbance moving across the eastern Caribbean induced by an upper level low pressure, brought ample amounts of tropical moisture across the region. This combined with fairly unstable upper atmospheric conditions induced convection which produced heavy rain across the central interior 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 Sep 16, 9:28 AM AST, 5 hours 2 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN JUAN PR 928 AM AST SUN SEP 16 2007 .UPDATE... UPDATED MORNING PACKAGE TO LOWER POPS TO REMOVE AREA OF CATEGORICAL COVERAGE OVER WESTERN INTERIOR AS WELL AS SHAVE POPS AND WEATHER DOWN TO ISOLATED OVER THE EASTERN HALF OF THE ISLAND. OTHER THAN THE AVERAGE HEAVY SHOWERS CREATED BY DAYTIME CONVERGENCE AND HEATING...DONT THINK COVERAGE WILL BE AS WIDESPREAD AS PREVIOUS PACKAGE SHOWED. RADAR PRECIP TOTALS FROM THE LAST 12 HOURS...AND DRY MID TO LOWER LAYER IN MORNING SOUNDING CONFIRM DRY AIRMASS ON THE NORTHERN AND NOW NORTHEASTERN FRINGES OF TROPICAL WAVE PASSING TO THE SOUTH...CURRENTLY AT 71 W. IN OTHER WORDS...DRIER AIR OVER MOST OF THE ISLAND. NAM12 SHOWS SOME MOISTURE ADVECTION FROM THE EAST TO OCCUR AS THE DAY PROGRESSES...AND GFS SHOWS SOME TO A LESSER DEGREE...BUT THIS SCENARIO IS INITIALIZING POORLY...SO DISCOUNTED IT. IN ANY CASE...TUTT LOW ROUGHLY OVER HAITI STILL IN FAVORABLE POSITION TO ALLOW UPPER SUPPORT...STILL LIKELY TO SEE SOME STRONG THUNDERSTORMS IN THE WEST INTERIOR...BUT COVERAGE SHOULD BE CONFINED TO THAT AREA. OTHERWISE...EXPECT ONLY ISOLATED SHOWERS. && .PREV DISCUSSION... /ISSUED 506 AM AST SUN SEP 16 2007/ SYNOPSIS... SURFACE HIGH PRESSURE RIDGE EXTENDS FROM THE EAST CENTRAL ATLANTIC SOUTHWESTWARD TO JUST EAST OF THE FLORIDA PENINSULA. SHOWERS AND THUNDERSTORMS ACROSS THE OFFSHORE ATLANTIC AND CARIBBEAN WATERS ARE TRAILING A TROPICAL WAVE NOW NEAR 71 WEST. THIS WEATHER IS BEING ENHANCED BY AN UPPER TROUGH WHICH EXTENDS ACROSS HISPANOLA INTO THE CENTRAL CARIBBEAN. STRONG THUNDERSTORMS WILL THEREFORE SPREAD FURTHER WEST NORTHWEST INTO THE OFFSHORE CARIBBEAN WATERS AND MONA PASSAGE THROUGH LATER THIS MORNING. A MID TO UPPER LEVEL TUTT AXIS AND ASSOCIATED LOW PRESSURE CENTERS WHICH ENTENDS SOUTHWEST FROM THE CENTRAL ATLANTIC ACROSS HISPANOLA INTO THE CENTRAL CARIBBEAN...IS FORECAST TO LINGER ACROSS THE AREA FOR THE NEXT COUPLE OF DAYS WHILE BECOMING MORE AMPLIFIED ACROSS THE CENTRAL CARIBBEAN. AT 500 AM AST...TROPICAL DEPRESSION INGRID WAS LOCATED NEAR 17.0 NORTH...56.8 WEST...MOVING WEST NEAR 10 KNOTS. BASED ON THE LATEST TROPICAL CYCLONE FORECAST... INGRID IS EXPECTED TO BEGIN TO MOVE MORE WEST NORTHWEST DURING THE NEXT 24 HOURS...AND PASS NORTHEAST OF THE LEEWARD ISLANDS MONDAY AND TUESDAY. THIS WILL ACT TO WEAKEN FURTHER WEAKEN THE WIND FLOW ACROSS THE LOCAL REGION. DISCUSSION... LOW LEVEL DISTURBANCE MOVING ACROSS THE EASTERN CARIBBEAN INDUCED BY THE UPPER TUTT WILL CONTINUE TO LIFT NORTHWEST ACROSS THE SOUTHERN CARIBBEAN WATERS AND BRING AMPLE AMOUNTS OF TROPICAL MOISTURE ACROSS THE REGION IN THE WEAK SOUTHEASTERLY WIND FLOW. THIS COMBINED WITH THE FAIRLY UNSTABLE UPPER ATMOSPHERIC CONDITIONS AND DAYTIME HEATING WILL BE SUFFICIENT TO INDUCE CONVECTION ACROSS THE LOCAL ISLANDS AND REGIONAL WATERS AT LEAST THROUGH MONDAY. EARLY MORNING SHOWERS AND THUNDERSTORMS WILL REACH THE EAST AND SOUTHEAST SHORE OF THE LOCAL ISLANDS FROM TIME TO TIME...WHILE AFTERNOON AND EVENING CONVECTION WILL BE MAINLY FOCUSED ACROSS THE NORTH CENTRAL...NORTHWEST AND WEST INTERIOR SECTIONS OF PUERTO RICO. THE MID TO UPPER LEVEL TROUGH WILL ALSO INTERACT WITH THE LOCAL TERRAIN EFFECTS AND SEA BREEZE VARIATIONS TO FURTHER ENHANCE AFTERNOON CONVECTION OVER LAND AND NOCTURNAL ACTIVITY OVER THE REGIONAL WATERS. MARINE... DUE TO THE RELATIVELY LIGHT WIND WIND FLOW ACROSS THE REGION... MARINE CONDITIONS ARE TO REMAIN FAIRLY TRANQUIL FOR THE NEXT SEVERAL DAYS....EXCEPT FOR OCCASIONAL GUSTS AND SQUALLS ASSOCIATED WITH THE STRONG THUNDERSTORMS MOVING OVER THE EXTREME SOUTHWESTERN CARIBBEAN WATERS THIS MORNING. LOCAL MARINE INTEREST SHOULD THEREFORE BE ALERT TO THIS ACTIVITY WHICH IS OCCURRING MAINLY SOUTH OF LATITUDE 17.5 NORTH. && .PRELIMINARY POINT TEMPS/POPS... SJU 88 78 89 78 / 30 30 30 30 STT 88 81 88 81 / 50 50 50 50 && .SJU WATCHES/WARNINGS/ADVISORIES... PR...NONE. VI...NONE. && 93/70
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN JUAN PR 630 AM AST SUN SEP 16 2007 PRZ001>013-AMZ710>750-171000- 630 AM AST SUN SEP 16 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PUERTO RICO. .TODAY AND TONIGHT...MODEST AMOUNTS OF LOW LEVEL MOISTURE AND SOME FAVORABLE UPPER LEVEL DYNAMICS WILL ALLOW SHOWERS AND SCATTERED THUNDERSTORMS TO FORM OVER INTERIOR PUERTO RICO...MAINLY IN THE WEST AND NORTHWEST SECTIONS. AGAIN URBAN AND SMALL STREAM FLOODING WILL BE POSSIBLE AS SOME AREAS RECEIVE UPWARD OF 2 INCHES OF RAIN. SHOWERS AND THUNDERSTORMS OVER LAND WILL DISSIPATE SHORTLY AFTER SUNSET. SHOWERS TO THE NORTHEAST OF PUERTO RICO MAY CONTINUE THROUGH THE NIGHT. .DAYS TWO THROUGH SEVEN...PASSING EARLY MORNING SHOWERS WILL AFFECT THE COASTAL AREAS FROM TIME TO TIME ALONG WITH SOME AFTERNOON SHOWERS AND STORMS. AS A RESULT...LOCALIZED URBAN AND SMALL STREAM FLOODING WILL REMAIN POSSIBLE IN THESE AREAS. BASED ON THE LATEST FORECAST TRAJECTORY FROM THE NATIONAL HURRICANE CENTER...TROPICAL STORM INGRID WILL TRACK NORTHEAST OF THE LEEWARD ISLANDS MONDAY INTO TUESDAY. THE PROGRESS OF THIS SYSTEM WILL HOWEVER BE CLOSELY MONITORED OVER THE NEXT FEW DAYS AS IT CONTINUES ON THE PROJECTED WEST NORTHWEST PATH. .SPOTTER CALL TO ACTION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED TODAY. VIZ001-002-AMZ710>730-171000- 630 AM AST SUN SEP 16 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE U.S. VIRGIN ISLANDS. .TODAY AND TONIGHT...SOME THUNDERSTORMS WILL FORM IN THE LEE OF THE U.S. VIRGIN ISLANDS DURING THE AFTERNOON...OTHERWISE NO HAZARDOUS WEATHER IS EXPECTED. .DAYS TWO THROUGH SEVEN...PASSING EARLY MORNING SHOWERS WILL AFFECT THE COASTAL AREAS FROM TIME TO TIME BUT NO SIGNIFICANT RAINFALL IS EXPECTED. AFTERNOONS SHOWERS OR AN ISOLATED THUNDERSTORM MAY DEVELOP OVER ONE OR TWO OF THE ISLANDS BUT NO GREATER HAZARDS ARE FORECAST FOR THESE AREAS. BASED ON THE LATEST FORECAST TRAJECTORY FROM THE NATIONAL HURRICANE CENTER...TROPICAL STORM INGRID WILL TRACK NORTHEAST OF THE LEEWARD ISLANDS MONDAY INTO TUESDAY. THE PROGRESS OF THIS SYSTEM WILL HOWEVER BE CLOSELY MONITORED OVER THE NEXT FEW DAYS AS IT CONTINUES ON THE PROJECTED WEST NORTHWEST PATH. .SPOTTER CALL TO ACTION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED TODAY. STAY TUNED TO NOAA WEATHER RADIO AND OTHER LOCAL MEDIA FOR FURTHER DETAILS OR UPDATES. FOR ADDITIONAL INFORMATION...VISIT THE NATIONAL WEATHER SERVICE WEB SITE FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS AT (ALL LOWERCASE LETTERS): HTTP://WWW.SRH.NOAA.GOV/SJU FROM YOUR PDA/PHONE: HTTP://MOBILE.SRH.NOAA.GOV OR WWW.SRH.NOAA.GOV/WML
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Emergency Management reported residentials structures flooded.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Puerto Rico in 2007Every state in 2007This day in weather historyWarnings in Puerto Rico, September 2007
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: 60327.