Alert archive / California / Beach Hazards Statements in 2015

Beach Hazards Statement 4, NWS San Francisco Bay Area, CA

July 28, 2015Santa Cruz County, California

NWS San Francisco Bay Area, CA issued this beach hazards statement at Jul 28, 2015, 12:33 PM PDT for Santa Cruz County, California. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued
Jul 28, 2015, 12:33 PM PDT (19:33 UTC)
Expired
Jul 28, 2015, 9:00 PM PDT
In force
8 hr
Issued by
NWS San Francisco Bay Area, CA

County Santa Cruz County, CA

The radar

The San Francisco radar (KMUX), 18 km from the middle of the area, began a volume at 19:35 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, 7.6 hours before the alert went out and 80 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 2015-07-28Temperature 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 2015-07-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 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
2479 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
15 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.

497 
WHUS46 KMTR 281933
CFWMTR

URGENT - IMMEDIATE BROADCAST REQUESTED
COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
1233 PM PDT TUE JUL 28 2015

...INCREASED RISK OF HAZARDOUS BEACH CONDITIONS ALONG SOUTH
FACING BEACHES...

.A LONG PERIOD SOUTHWESTERLY SWELL IS BRINGING AN INCREASED RISK OF
RIP CURRENTS AND LARGE SHORE BREAK ALONG THE SOUTH FACING BEACHES
OF SANTA CRUZ COUNTY TODAY.

CAZ529-290400-
/O.NEW.KMTR.BH.S.0004.150728T1933Z-150729T0400Z/
NORTHERN MONTEREY BAY-
1233 PM PDT TUE JUL 28 2015

...BEACH HAZARDS STATEMENT IN EFFECT UNTIL 9 PM PDT THIS
EVENING...

* LOCATION... SOUTH FACING BEACHES OF SANTA CRUZ COUNTY. 

* TIMING... THROUGH 9 PM TUESDAY EVENING.

* IMPACTS... EXCEPTIONALLY STRONG RIP CURRENTS AND LARGE SHORE
  BREAK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A BEACH HAZARDS STATEMENT MEANS THAT POTENTIALLY DANGEROUS
CONDITIONS MAY EXIST ON SPECIFIC BEACHES. THESE HAZARDS MAY
INCLUDE LARGE SHORE BREAK AND STRONG RIP CURRENTS. ALL OF WHICH
COULD BE LIFE THREATENING. BE SURE TO ALWAYS KEEP YOUR EYES ON THE
OCEAN.

&&

$$


HTTP://WWW.WEATHER.GOV/SANFRANCISCO
1 follow-up statement
339 
WHUS46 KMTR 290414
CFWMTR

URGENT - IMMEDIATE BROADCAST REQUESTED
COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
914 PM PDT TUE JUL 28 2015

CAZ529-290515-
/O.EXP.KMTR.BH.S.0004.000000T0000Z-150729T0400Z/
NORTHERN MONTEREY BAY-
914 PM PDT TUE JUL 28 2015

...BEACH HAZARDS STATEMENT HAS EXPIRED...

A LONG PERIOD SOUTHWESTERLY SWELL WILL CONTINUE TO IMPACT SOUTH
FACING BEACHES THROUGH WEDNESDAY HOWEVER THE PERIODS WILL
GRADUALLY BECOME SHORTER OVERNIGHT RESULTING IN A DECREASED RISK
OF RIP CURRENTS.

$$


HTTP://WWW.WEATHER.GOV/SANFRANCISCO

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 28, 2:27 AM PDTSmall Craft AdvisoryMTR19 hr

Nearby

Beach Hazards Statements in California, 2015Every beach hazards statement in 2015

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.