1 heavy rain, as filed by the National Weather Service.
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 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 Apr 19, 5:30 AM AST, 10 hours earlier.
FXCA62 TJSJ DDHHMM AFDSJU PUERTO RICO AND U.S. VIRGIN ISLANDS FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN JUAN PR 530 AM AST MON APR 19 2004 .DISCUSSION... AS HAS BEEN ADVERTISED PAST FEW DAYS...ABUNDANT MOISTURE CONVERGING ALONG AND EAST OF A LOW LLVL TROF CURRENTLY ALONG EASTERN PUERTO RICO...WILL MOVE SLOWLY WESTWARD ACROSS THE LOCAL AREA THROUGH THE LATE EVENING HOURS TO YIELD SCATTERED TO NUMEROUS SHOWERS AND ISOLATED TO LOCALLY SCATTERED THUNDERSTORMS. AN UPPER LEVEL TROUGH JUST TO OUR NORTHWEST WILL PROVIDE UNSTABLE MID AND UPPER LEVEL CONDITIONS TO ENHANCE CONVECTIVE ACTIVITY ACROSS THE REGION AND MAY PRODUCE ITS MOST PRONOUNCED LIFT ACROSS THE REGION THIS AFTERNOON AND EVENING. SOME AREAS WILL SEE VERY HEAVY RAINFALL. DRIER LLVL AIR AND MORE STABLE CONDITIONS EXPECTED TUESDAY AFTERNOON THROUGH THE REST OF THE WEEK BUT WITH UPPER TROUGH LINGERING CLOSE ENOUGH FOR AN AFTERNOON TSTORM OR TWO POSSIBLE THROUGH MID WEEK ACROSS WRN P.R. && .MARINE... NELY FLOW TO THE WEST OF OLD SHEAR LINE AND MERGING LLVL TROF COMBINING WITH PREVAILING ENE WIND SWELL AND SMALL NW SWELL FOR COMBINED SEAS NEAR 7 FEET ACROSS FAR NORTH MONA PASSAGE...WITH OFFSHORE ATLANTIC SEAS OTHERWISE 5-6 FEET. HAVE TRIED TO ALTER MARINE GRAPHICS TO REFLECT FORECASTED MODEL TREND NEXT FEW DAYS. && .HYDROLOGY... IF RECENT DOPPLER RADAR TRENDS CONTINUE THROUGHOUT THE NEXT 12 HOURS...SCATTERED AREAS MAY SEE 1-2 INCHES TODAY WITH ISOLATED PRECIP MAXES 4-6 INCHES POSSIBLE...AND 6-8 INCHES NOT OUT OF THE QUESTION. THIS AMOUNT OF RAIN COULD OCCUR IN 2-6 HOURS AND WOULD LEAD TO FLASH FLOODING. FLASH FLOOD WATCHES MAY NEED TO BE ISSUED TODAY. INTERIOR SECTIONS OF P.R. ARE EXPECTED TO BE THE FOCUS OF THE HEAVIEST RAINFALL OVER LAND NEXT 24 HOURS...WITH ST CROIX POISED FOR SUFFICIENT MOISTURE AND RAINFALL AS WELL. && .PRELIMINARY POINT TEMPS/POPS... SJU 86 73 85 72 / 60 50 60 40 STT 85 72 84 71 / 60 40 30 50 && .SJU WATCHES/WARNINGS/ADVISORIES... PR...NONE. VI...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN JUAN PR 600 AM AST MON APR 19 2004 PRZ001>013-AMZ710>750-201000- 600 AM AST MON APR 19 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PUERTO RICO. .TODAY AND TONIGHT...INCREASED MOISTURE AND INSTABILITY WILL CONTINUE ACROSS THE LOCAL AREA THROUGH TONIGHT...WHICH WILL INCREASE THE CHANCES OF RAINFALL AND THE POTENTIAL FOR SOME URBAN AND SMALL STREAM FLOODING. THIS RAINFALL COULD ALSO PRODUCE SOME AREAS OF RIVER FLOODING. LONG PERIOD EAST NORTHEAST SWELLS WILL CONTINUE TO AFFECT THE LOCAL ATLANTIC WATERS AND THE EASTERN CARIBBEAN PASSAGES THROUGH TODAY. .SPOTTER CALL TO ACTION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY. .TUESDAY THROUGH SUNDAY...THERE WILL BE A GREATER AMOUNT OF INSTABILITY AND MOISTURE OVER OUR LOCAL AREA THROUGH MUCH OF THE WEEK WHICH WILL PRODUCE MORE WIDESPREAD SHOWER ACTIVITY. LONG PERIOD EAST NORTHEAST SWELLS WILL CONTINUE TO AFFECT THE LOCAL ATLANTIC WATERS AND THE EASTERN CARIBBEAN PASSAGES WITH A PEAK IN SEA HEIGHTS EXPECTED AT NEAR 7 FEET IN THE OFF SHORE ATLANTIC WATERS THIS AFTERNOON. VIZ001-002-AMZ710>730-201000- 600 AM AST MON APR 19 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE U.S. VIRGIN ISLANDS. .TODAY AND TONIGHT...INCREASED MOISTURE AND INSTABILITY OVER THE LOCAL AREA THROUGH TONIGHT WILL INCREASE THE CHANCES OF RAINFALL AND THE POTENTIAL FOR SOME URBAN AND SMALL STREAM FLOODING. LONG PERIOD EAST NORTHEAST SWELLS WILL CONTINUE TO AFFECT THE LOCAL ATLANTIC WATERS AND THE EASTERN CARIBBEAN PASSAGES THROUGH TODAY. .SPOTTER CALL TO ACTION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY. .TUESDAY THROUGH SUNDAY...THERE WILL BE A GREATER AMOUNT OF INSTABILITY AND MOISTURE OVER OUR LOCAL AREA THROUGH MUCH OF THE WEEK WHICH WILL PRODUCE AN OVERALL INCREASE IN SHOWER ACTIVITY THROUGH THE WEEK. LONG PERIOD EAST NORTHEAST SWELLS WILL CONTINUE TO AFFECT THE LOCAL ATLANTIC WATERS AND THE EASTERN CARIBBEAN PASSAGES WITH A PEAK IN SEA HEIGHTS EXPECTED AT NEAR 7 FEET OFF SHORE ATLANTIC WATERS THIS AFTERNOON. 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.
1 heavy rain. Local standard time, as filed.
Urban flooding was reported in Cupey, Rio Piedras. The Winston Churchill and San Claudio Avenues, and road 844 were impassable.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Puerto Rico in 2004Every state in 2004This day in weather historyWarnings in Puerto Rico, April 2004
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 2026-10-01. Each event’s entry at NCEI: 5391795.