A cold front north of Puerto Rico produced heavy rains over the north central municipalities of Vega Baja and Vega Alta. Some of the observed precipitation totals exceeded two inches over Vega Baja, and small stream flooding was reported.
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The episode as NWS SJU wrote it up.
A cold front north of Puerto Rico produced heavy rains over the north central municipalities of Vega Baja and Vega Alta. Some of the observed precipitation totals exceeded two inches over Vega Baja, and small stream flooding was reported.
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 Feb 20, 5:29 AM AST, 3 hours 51 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
529 AM AST SAT FEB 20 2010
.SYNOPSIS... FRONT ALONG 20N WILL MOVE LITTLE OVER THE NEXT FEW
DAYS BEFORE DISSIPATING BY TUESDAY. ANOTHER FRONT WILL APPROACH THE
AREA TOWARD THE END OF NEXT WEEK.
&&
.DISCUSSION...A LINE OF SHOWERS HAS PERSISTED ALONG THE NORTHERN
MUNICIPALITIES OF PUERTO RICO...EXTENDING FROM DORADO...WEST TO
ISABELA. THE REST OF PUERTO RICO HAS BEEN MAINLY CLOUDY WITH ONLY
ISOLATED LIGHT SHOWERS. TODAY WILL REMAIN SOMEWHAT CLOUDY ACROSS
THE LOCAL AREA...AS A COLD FRONT ALONG 20N MOVES LITTLE OVER THE
NEXT 12 HOURS. LATEST RADAR IMAGES INDICATED THAT NO SIGNIFICANT
RAINFALL HAS OCCUR OVER THE ATLANTIC WATERS. LATEST SURFACE
OBSERVATIONS...AS WELL AS BUOY DATA TO OUR NORTH...INDICATED THAT
WE DIDN'T HAD A FRONT PASSAGE ACROSS THE LOCAL AREA. BUOY
41043...WHICH IS LOCATED NEAR 200 MILES NORTHEAST OF SAN JUAN...
INDICATED DEW POINT TEMPERATURES HAS FLUCTUATED BETWEEN 62F AND
64F...WITH NORTH AND NORTHEAST WINDS ALSO REPORTED AT THE BUOY.
MEANWHILE...AT SAN JUAN...THE DEW POINT TEMPERATURES HAS FLUCTUATED
BETWEEN 70F AND 72F THE LAST 24 HOURS. ALTHOUGH FRONT IS NOT
EXPECTED TO PASS OVER THE LOCAL AREA...RAIN IS EXPECTED TO
CONTINUE FROM TIME TO TIME MAINLY OVER THE NORTHERN HALF OF PUERTO
RICO. A DRIER TREND IS THEN EXPECTED BY TUESDAY AND WEDNESDAY. IN
THE LONG TERM...ANOTHER COLD FRONT IS FORECAST BY COMPUTER MODELS
TO APPROACH THE LOCAL AREA TOWARD THE END OF NEXT WEEK.
HOWEVER...IS TOO EARLY TO KNOW IF THIS SYSTEM WILL HAVE A
SIGNIFICANT IMPACT ON OUR WEATHER.
&&
.AVIATION...THE FRONTAL BOUNDARY WILL HOLD NORTH OF PUERTO RICO AND
ALL TAF SITES THROUGH 21/08Z...CLOUDS...SCT SHWRS...AND SOME MVFR
CIGS WILL BE SEEN OVER PUERTO RICO AND THE U.S.VIRGIN ISLANDS
THROUGH OUT THE DAY WITH SHOWERS INCRG AFT 20/22Z OVER TIST AND AFT
21/00Z OVER TJSJ AND TJBQ. AFT 21/06Z EXPECT SFC WINDS TO SHIFT MORE
TOWARD EAST SOUTHEAST. MOUNTAIN OBSCURATIONS WILL OCCUR THROUGH AT
LEAST 21/06Z. MVFR CIGS ALSO POSSIBLE AT TNCM DUE TO PROXIMITY TO
FRONTAL BAND.
&&
.MARINE...MODERATE NNW SWELLS WILL CONTINUE ACROSS THE LOCAL ATLC
WATERS TODAY WITH 8-10 FT SEAS OFFSHORE AND BREAKING WAVES OF 10 TO 15
FT ALG THE COASTLINE. SCA AND HIGH SURF ADVISORIES ARE IN EFFECT.
&&
.PRELIMINARY POINT TEMPS/POPS...
SJU 84 72 83 71 / 60 60 20 20
STT 83 74 83 74 / 50 50 20 20
&&
.SJU WATCHES/WARNINGS/ADVISORIES...
PR...HIGH SURF ADVISORY UNTIL NOON AST SUNDAY FOR CULEBRA-
MAYAGUEZ AND VICINITY-NORTH CENTRAL-NORTHEAST-NORTHWEST-SAN JUAN
AND VICINITY- VIEQUES.
SCA...AMZ710-712-715-741-742
VI...HIGH SURF ADVISORY UNTIL NOON AST SUNDAY FOR ST. THOMAS/ST.
JOHN/ADJACENT ISLANDS.
SCA...AMZ710-715-722
&&
12/71HAZARDOUS WEATHER OUTLOOK FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS NATIONAL WEATHER SERVICE SAN JUAN PR 509 AM AST SAT FEB 20 2010 AMZ710>745-PRZ001>013-210915- 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- 509 AM AST SAT FEB 20 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PUERTO RICO AND THE ADJACENT COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT LONG PERIOD NORTHERLY SWELLS WILL SLOWLY DIMINISH IN THE ATLANTIC WATERS AND CONNECTING PASSAGES. HIGH SURF WILL CONTINUE ON THE NORTHERN EXPOSED COASTS OF PUERTO RICO...CULEBRA AND VIEQUES WITH A HIGH RISK OF RIP CURRENTS. NO OTHER HAZARDOUS WEATHER IS EXPECTED. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY HIGH SURF CONDITIONS ARE EXPECTED TO CONTINUE THROUGH NOON SUNDAY WITH A CONTINUED HIGH RISK OF RIP CURRENTS. NO OTHER HAZARDOUS WEATHER IS EXPECTED. .SPOTTER INFORMATION STATEMENT...SURF REPORTS ARE WELCOME. AMZ715-725-VIZ001-002-210915- ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX- NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS- 509 AM AST SAT FEB 20 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE U.S. VIRGIN ISLANDS AND THE ADJACENT COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT LONG PERIOD NORTHERLY SWELLS WILL SLOWLY DIMINISH IN THE ATLANTIC WATERS AND CONNECTING PASSAGES. HIGH SURF WILL CONTINUE ON THE NORTHERN EXPOSED COASTS OF SAINT THOMAS AND SAINT JOHN WITH A HIGH RISK OF RIP CURRENTS. NO OTHER HAZARDOUS WEATHER IS EXPECTED. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY HIGH SURF CONDITIONS ARE EXPECTED TO CONTINUE THROUGH NOON SUNDAY WITH A CONTINUED HIGH RISK OF RIP CURRENTS. NO OTHER HAZARDOUS WEATHER IS EXPECTED. .SPOTTER INFORMATION STATEMENT...SURF REPORTS ARE WELCOME.
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Highway 2 and PR 690 remained impassable for the small streams Quebrada Honda and Quebrada Machuchal in the Bajura sector overflowing the roadways.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Puerto Rico in 2010Every state in 2010This day in weather historyWarnings in Puerto Rico, February 2010
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: 218500.