Alert archive / California / Beach Hazards Statements in 2016
Beach Hazards Statement 21, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this beach hazards statement at Dec 3, 2016, 6:24 AM PST for 6 counties in California. It was in force for 12 hr.
The area
The counties it named.
The facts
- Issued
- Dec 3, 2016, 6:24 AM PST (14:24 UTC)
- Expired
- Dec 3, 2016, 6:00 PM PST
- In force
- 12 hr
- Issued by
- NWS San Francisco Bay Area, CA
Counties City and County of San Francisco, CA, Marin County, CA, Monterey County, CA, San Mateo County, CA, Santa Cruz County, CA, Sonoma County, CA
The radar
The San Francisco radar (KMUX), 53 km from the middle of the area, began a volume at 14:22 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, 2.4 hours before the alert went out and 26 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2290 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 85 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
768 WHUS46 KMTR 031424 CFWMTR COASTAL HAZARD MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO CA 624 AM PST SAT DEC 3 2016 LONG PERIOD WAVES ARE ARRIVING ALONG THE COAST. AT 6 AM THE HALF MOON BAY BUOY AND MONTEREY BAY BUOY REPORT 10 FOOT NORTHWESTERLY WAVES AT 20 SECOND PERIOD. THIS WILL PRODUCE LARGE BREAKERS ALONG THE BEACHES WITH THE POTENTIAL FOR SNEAKER WAVES AND RIP CURRENTS. WAVE PERIOD WILL DECREASE TO 17 TO 18 SECONDS LATER THIS MORNING BUT WAVES MAY INCREASE SLIGHTLY. CAZ006-505-509-529-530-040200- /O.NEW.KMTR.BH.S.0021.161203T1424Z-161204T0200Z/ SAN FRANCISCO- COASTAL NORTH BAY INCLUDING POINT REYES NATIONAL SEASHORE- SAN FRANCISCO PENINSULA COAST-NORTHERN MONTEREY BAY- SOUTHERN MONTEREY BAY AND BIG SUR COAST- 624 AM PST SAT DEC 3 2016 ...BEACH HAZARDS STATEMENT IN EFFECT UNTIL 6 PM PST THIS EVENING... THE NATIONAL WEATHER SERVICE IN SAN FRANCISCO HAS ISSUED A BEACH HAZARDS STATEMENT FOR SNEAKER WAVES...WHICH IS IN EFFECT UNTIL 6 PM PST THIS EVENING. * HAZARDS...LARGE LONG-PERIOD BREAKERS. * TIMING...THROUGH 6 PM. * LOCATION...ALONG THE COAST FROM SONOMA COUNTY TO MONTEREY COUNTY. * POTENTIAL IMPACTS...POTENTIAL FOR SNEAKER WAVES AND RIP CURRENTS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A BEACH HAZARD STATEMENT FOR SNEAKER WAVES MEANS THAT CONDITIONS ARE PRESENT TO SUPPORT A HEIGHTENED RISK OF UNSUSPECTING BEACH GOERS BEING SWEPT INTO THE SEA BY A WAVE. PEOPLE WALKING ALONG THE BEACH SHOULD NEVER TURN THEIR BACK TO THE SEA. FISHERMAN SHOULD AVOID FISHING FROM ROCKS OR JETTIES. && $$
1 follow-up statement
448 WHUS46 KMTR 032221 CFWMTR COASTAL HAZARD MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO CA 221 PM PST SAT DEC 3 2016 .LONG PERIOD WAVES ARE ARRIVING AT AREA BEACHES. AT 2 PM THE HALF MOON BAY BUOY AND MONTEREY BAY BUOY REPORTED 10 FOOT NORTHWESTERLY SWELLS AT 19 SECOND PERIODS. THIS WILL PRODUCE LARGE BREAKERS ALONG THE BEACHES WITH THE POTENTIAL FOR SNEAKER WAVES AND RIP CURRENTS. CAZ006-505-509-529-530-040200- /O.CON.KMTR.BH.S.0021.000000T0000Z-161204T0200Z/ SAN FRANCISCO- COASTAL NORTH BAY INCLUDING POINT REYES NATIONAL SEASHORE- SAN FRANCISCO PENINSULA COAST-NORTHERN MONTEREY BAY- SOUTHERN MONTEREY BAY AND BIG SUR COAST- 221 PM PST SAT DEC 3 2016 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT UNTIL 6 PM PST THIS EVENING... * HAZARDS...LARGE LONG-PERIOD WAVES. * TIMING...THROUGH 6 PM. * LOCATION...ALONG THE COAST FROM SONOMA COUNTY TO MONTEREY COUNTY. * POTENTIAL IMPACTS...POTENTIAL FOR SNEAKER WAVES...LARGE SHORE BREAK AND RIP CURRENTS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A BEACH HAZARD STATEMENT FOR SNEAKER WAVES MEANS THAT CONDITIONS ARE PRESENT TO SUPPORT A HEIGHTENED RISK OF UNSUSPECTING BEACH GOERS BEING SWEPT INTO THE SEA BY A WAVE. PEOPLE WALKING ALONG THE BEACH SHOULD NEVER TURN THEIR BACK TO THE SEA. FISHERMAN SHOULD AVOID FISHING FROM ROCKS OR JETTIES. && $$
The office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 3, 3:03 AM PST | Small Craft Advisory | MTR | 4 days |
Nearby
Beach Hazards Statements in California, 2016Every beach hazards statement in 2016
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.