Hydrologic Outlook issued April 27 at 4:47AM AST by NWS San Juan PR

ESFSJU

Abundant moisture, along with a series of troughs, will continue to
enhance the potential for showers and thunderstorms today,
and stretching into at least Thursday.

At this time, USGS river sensors indicate that most streams are
running normal to much above normal, and soils are saturated along
eastern, interior and western Puerto Rico. Some rivers reached
action to minor flood stage with yesterday’s heavy rains.
Additionally, winds are expected to be weak through much of this
period, so any
rainfall activity that develops will be long-lasting.

In general, we are expecting additional rainfall accumulation of 2
to 4 inches each day, with the heaviest accumulation along the
interior, north and western Puerto Rico. However, periods of heavy
rain will also reach the Virgin Islands and eastern Puerto Rico,
including the San Juan metropolitan area, too. There is an elevated
risk of flooding each day through Thursday.

The likelihood of urban and small stream flooding, mudslides and
rapid river rises will increase, and there is a chance of isolated
flash flooding as well.

There is some uncertainty in the location and timing of this rain,
as well as how much cloud coverage will limit the development of
afternoon showers and thunderstorms. However, there is a high
confidence on a wet and unsettled period for Puerto Rico, the Virgin
Islands and local waters. Conditions are expected to improve next
Saturday, May 3rd, but changes in the forecast are likely before
then.

Please stay tuned for further updates. This product will be updated
if necessary.