Alert archive / Puerto Rico / Flash Flood Watches in 2010

Flash Flood Watch 1, NWS JSJ

January 14, 2010

NWS JSJ issued this flash flood watch at Jan 14, 2010, 2:47 PM CST. It was in force for 35 hr.

The area

The counties it named.

The facts

Issued: Jan 14, 2010, 2:47 PM CST (20:47 UTC)
Expired: Jan 16, 2010, 1:46 AM CST
In force: 35 hr
Issued by: NWS JSJ
Flood severity: None

What forecasters said that day

The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS JSJ wrote its last area forecast discussion before this flash flood watch went out at Jan 14, 12:52 PM CST, 1 hour 55 minutes earlier.

Area forecast discussion, Jan 14, 12:52 PM CST, 1 hour 55 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
252 PM AST THU JAN 14 2010

.SYNOPSIS...AN AREA OF HIGH PRESSURE WILL BUILD ACROSS THE WESTERN
ATLANTIC TONIGHT THROUGH SATURDAY...INCREASING THE LOCAL PRESSURE
GRADIENT...AS WELL AS FORCING AN OLD FRONTAL BOUNDARY ACROSS THE
REST OF THE LOCAL WATERS.

&&

.DISCUSSION...SCATTERED TO NUMEROUS SHOWERS CONTINUED TO AFFECT THE
NORTHERN PORTIONS OF PUERTO RICO THROUGH THE AFTERNOON HOURS.
MORE SHOWERS ARE EXPECTED TO DEVELOP ALONG THE NORTHERN COAST OF
PUERTO RICO. WINDS ARE EXPECTED TO SHIFT TO A MORE EASTERLY
COMPONENT LATER TONIGHT THEREFORE ISOLATED TO SCATTERED SHOWER WILL
AFFECT THE EASTERN PORTIONS OF PUERTO RICO AND ADJACENT ISLANDS
THROUGH FRIDAY MORNING.

AN OLD COLD FRONT NORTH OF THE ISLANDS WILL CONTINUE TO SLOWLY MOVE
SOUTHWARD AS A STRONGER POLAR SURGE PROGRESSES ACROSS THE WESTERN
ATLANTIC AND REINFORCES THE OLD BOUNDARY. THE FRONT IS EXPECTED TO
BECOME NEARLY STATIONARY AND FAIRLY INTACT THROUGH AT LEAST EARLY
SATURDAY.

&&

.AVIATION...THE REMNANTS OF AN OLD FRONTAL BOUNDARY WILL CONTINUE TO
INDUCE INTERMITTENT PERIODS OF MVFR VIS AND CIGS FOR THE REST OF
THIS AFTERNOON AND EVENING ACROSS TJSJ...TIST...TJPS AND TJBQ. THE
REST OF THE TAF SITES SHOULD REMAIN MOSTLY VFR WITH LIMITED PERIODS
OF MVFR IN LIGHT SHRA. TJSJ 12Z SOUNDING INDICATED A LIGHT
SOUTHEASTERLY WIND FLOW ALL THE WAY FROM THE SURFACE TO AROUND 15K
FEET...BECOMING FROM THE WEST AND STRONGER ALOFT.

&&

.MARINE...ALTHOUGH CHOPPY SEAS EXPECTED TO CONTINUE THROUGH
AT LEAST THE INCOMING WEEKEND...THE CURRENT CONDITIONS ACROSS THE
NEAR SHORE ATLANTIC WATERS AND ALL PASSAGES WILL BE BELOW SCA
CRITERIA. SCA WILL BE IN EFFECT FOR THE OFF SHORE ATLANTIC WATERS.

&&

.PRELIMINARY POINT TEMPS/POPS...
SJU  72  79  73  83 /  70  60  40  40
STT  73  83  73  84 /  50  50  40  40

&&

.SJU WATCHES/WARNINGS/ADVISORIES...
PR...NONE.
VI...NONE.
&&

72/10

Hazardous weather outlook, Jan 14, 4:11 AM CST, 10 hours 36 minutes before

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In the hours before

Local storm report, Jan 14, 12:34 PM CST, 2 hours 13 minutes before

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The office that day

Everything else NWS JSJ issued on the same UTC day.

Issued	Product	Office	Lasted
Jan 13, 6:00 PM CST	Areal Flood Advisory	JSJ	3 hr
Jan 13, 7:13 PM CST	Areal Flood Advisory	JSJ	2 hr
Jan 13, 7:30 PM CST	Areal Flood Advisory	JSJ	117 min
Jan 13, 7:50 PM CST	Flash Flood Warning	JSJ	3 hr
Jan 14, 3:45 AM CST	Areal Flood Advisory	JSJ	12 hr
Jan 14, 5:45 AM CST	Areal Flood Advisory	JSJ	6 hr
Jan 14, 11:47 AM CST	Flash Flood Warning	JSJ	3 hr
Jan 14, 12:07 PM CST	Areal Flood Advisory	JSJ	113 min
Jan 14, 1:58 PM CST	Areal Flood Advisory	JSJ	5 hr
Jan 14, 4:00 PM CST	Areal Flood Advisory	JSJ	3 hr
Jan 14, 4:43 PM CST	Flash Flood Warning	JSJ	2 hr

Nearby

Flash Flood Watches in Puerto Rico, 2010 Every flash flood watch in 2010

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.