Alert archive / California / Beach Hazards Statements in 2014

Beach Hazards Statement 8, NWS San Francisco Bay Area, CA

October 3, 2014Marin County, Santa Cruz County, Sonoma County, California

NWS San Francisco Bay Area, CA issued this beach hazards statement at Oct 3, 2014, 8:11 AM PDT for Marin County, Santa Cruz County, Sonoma County, California. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued
Oct 3, 2014, 8:11 AM PDT (15:11 UTC)
Expired
Oct 3, 2014, 8:00 PM PDT
In force
12 hr
Issued by
NWS San Francisco Bay Area, CA

Counties Marin County, CA, Santa Cruz County, CA, Sonoma County, CA

The radar

The San Francisco radar (KMUX), 98 km from the middle of the area, began a volume at 15:16 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Oakland, CA (KOAK), launched 12:00Z, 3.2 hours before the alert went out and 35 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Oakland, CA at 12:00Z on 2014-10-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Oakland, CA at 12:00Z on 2014-10-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2956 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
-30 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

827 
WHUS46 KMTR 031511
CFWMTR

URGENT - IMMEDIATE BROADCAST REQUESTED
COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
811 AM PDT FRI OCT 3 2014

...INCREASED RISK OF RIP CURRENTS AT SOUTHERLY FACING BEACHES TODAY...

A MODERATE SIZED LONG PERIOD SOUTHWEST SWELL WILL PRODUCE STRONG
RIP CURRENTS ALONG SOUTH TO SOUTHWEST FACING BEACHES THROUGH TONIGHT.

CAZ505-529-040300-
/O.NEW.KMTR.BH.S.0008.141003T1511Z-141004T0300Z/
COASTAL NORTH BAY...INCLUDING POINT REYES NATIONAL SEASHORE-
NORTHERN MONTEREY BAY-
811 AM PDT FRI OCT 3 2014

...BEACH HAZARDS STATEMENT IN EFFECT THROUGH THIS EVENING...

THE NATIONAL WEATHER SERVICE IN THE SAN FRANCISCO BAY AREA HAS
ISSUED A BEACH HAZARDS STATEMENT FOR RIP CURRENTS...
WHICH IS IN EFFECT THROUGH THIS EVENING. 

* LOCATION...SOUTH TO SOUTHWEST FACING BEACHES IN MARIN AND SANTA
  CRUZ COUNTIES...INCLUDING BUT NOT LIMITED TO...STINSON
  BEACH...SANTA CRUZ BOARDWALK BEACH....AND TWIN LAKES BEACH.

* TIMING...THROUGH AT LEAST FRIDAY EVENING.

* IMPACTS...INCREASED RISK OF DANGEROUS RIP CURRENTS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...A BEACH HAZARD STATEMENT FOR RIP
CURRENTS MEANS THAT CONDITIONS ARE PRESENT TO SUPPORT A HEIGHTENED
RISK OF STRONG RIP CURRENTS. RIP CURRENTS ARE TYPICALLY MORE
FREQUENT AND STRONGER IN THE VICINITY OF JETTIES...INLETS...AND
PIERS. SWIMMERS CAUGHT IN A RIP CURRENT SHOULD SWIM PARALLEL TO
THE COAST TO ESCAPE THE RIP CURRENT BEFORE TRYING TO SWIM FOR
SHORE. SWIMMERS SHOULD ALWAYS SWIM NEAR A LIFEGUARD.

PLEASE VISIT THE FOLLOWING WEBSITE TO SHARE YOUR THOUGHTS ON THE
NEW BEACH HAZARDS STATEMENT...

HTTP://WWW.WEATHER.GOV/SURVEY/NWS-SURVEY.PHP?CODE=CHMBHS.

&&

$$

HTTP://WWW.WEATHER.GOV/SANFRANCISCO

The office that day

Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 3, 10:23 AM PDTHeat AdvisoryMTRAlameda, Contra Costa, Marin, Monterey, Napa, San Benito and 4 more35 hr

Nearby

Beach Hazards Statements in California, 2014Every beach hazards statement in 2014

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.