Alert archive / California / Small Craft Advisories in 2018

Small Craft Advisory 248, NWS San Francisco Bay Area, CA

December 15, 2018

NWS San Francisco Bay Area, CA issued this small craft advisory at Dec 15, 2018, 2:47 AM PST. It took effect at Dec 16, 2018, 10:00 AM PST. It was in force for 4 days.

The area

The counties it named.

The facts

Issued
Dec 15, 2018, 2:47 AM PST (10:47 UTC)
In effect from
Dec 16, 2018, 10:00 AM PST
Expired
Dec 20, 2018, 4:00 PM PST
In force
4 days
Issued by
NWS San Francisco Bay Area, CA

What forecasters said that day

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

NWS San Francisco Bay Area, CA wrote its last area forecast discussion before this small craft advisory went out at Dec 14, 3:10 PM PST, 11 hours 37 minutes earlier.

Area forecast discussion, Dec 14, 3:10 PM PST, 11 hours 37 minutes before
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Hazardous weather outlook, Dec 14, 5:40 AM PST, 21 hours 7 minutes before
Hazardous Weather Outlook
National Weather Service San Francisco CA
540 AM PST Fri Dec 14 2018

CAZ006-505-509-529-530-151400-
San Francisco-
Coastal North Bay Including Point Reyes National Seashore-
San Francisco Peninsula Coast-Northern Monterey Bay-
Southern Monterey Bay and Big Sur Coast-
540 AM PST Fri Dec 14 2018

This hazardous weather outlook is for the San Francisco Bay Area.

.DAY ONE...Today and Tonight

A cold front will bring rain to the Bay Area.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

A very large long period northwest swell is expected to begin
arriving on Sunday and continue into the first part of next week.
This will result in hazardous beach conditions due to:

*  large run-up waves, strong rip currents, sneaker waves, and
   strong longshore currents.

A high surf warning will likely be issued once the wave energy is
within 48 hours of arriving.

Also, an active weather pattern is expected to continue Saturday
through Monday morning. A stronger and wetter system is expected
to produce widespread rain across our entire region Sunday
afternoon and Sunday night along with locally strong and gusty
winds.

Hazards associated with the second system include:

*  Possible period of moderate to heavy rain, which may result in
   temporary local flooding of low lying areas and ponding on
   roadways.

*  Locally strong and gusty winds, especially along the coast and
   in the hills.

Please continue to monitor the latest forecasts.

A return to dry weather is expected late Monday through Thursday
as an upper level ridge builds into the area.

.SPOTTER INFORMATION STATEMENT...
No spotter activation is expected.

CAZ506>508-510>513-516>518-528-151400-
North Bay Interior Valleys-North Bay Mountains-
San Francisco Bay Shoreline-East Bay Interior Valleys-
East Bay Hills and the Diablo Range-Santa Cruz Mountains-
Santa Clara Valley Including San Jose-
Southern Salinas Valley/Arroyo Seco and Lake San Antonio-
Santa Lucia Mountains and Los Padres National Forest-
Mountains Of San Benito County And Interior Monterey County
Including Pinnacles National Park-
Northern Salinas Valley/Hollister Valley and Carmel Valley-
540 AM PST Fri Dec 14 2018

This hazardous weather outlook is for the San Francisco Bay Area.

.DAY ONE...Today and Tonight

A cold front will bring rain to the Bay Area.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

An active weather pattern is expected to continue Saturday
through Monday morning. A stronger and wetter system is expected
to produce widespread rain across our entire region Sunday
afternoon and Sunday night along with locally strong and gusty
winds.

Hazards associated with the second system include:

*  Possible period of moderate to heavy rain, which may result in
   temporary local flooding of low lying areas and ponding on
   roadways.

*  Locally strong and gusty winds, especially along the coast and
   in the hills.

Please continue to monitor the latest forecasts.

A return to dry weather is expected late Monday through Thursday
as an upper level ridge builds into the area.

.SPOTTER INFORMATION STATEMENT...
No spotter activation is expected.

Nearby

Small Craft Advisories in California, 2018Every small craft advisory in 2018

Sources

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