Alert archive / California / Beach Hazards Statements in 2018
Beach Hazards Statement 7, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this beach hazards statement at Dec 5, 2018, 2:57 AM PST for 6 counties in California. It took effect at Dec 5, 2018, 12:00 PM PST. It was in force for 44 hr.
The area
The counties it named.
The facts
- Issued
- Dec 5, 2018, 2:57 AM PST (10:57 UTC)
- In effect from
- Dec 5, 2018, 12:00 PM PST
- Expired
- Dec 7, 2018, 8:00 AM PST
- In force
- 44 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 10:58 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 00:00Z, 11.0 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
- 1531 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 74 m²/s²
- 0-3 km storm-relative helicity
- 78 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
410 WHUS46 KMTR 051057 CFWMTR Coastal Hazard Message National Weather Service San Francisco Bay Area 257 AM PST Wed Dec 5 2018 CAZ006-505-509-529-530-052200- /O.NEW.KMTR.BH.S.0007.181205T2000Z-181207T1600Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 257 AM PST Wed Dec 5 2018 ...BEACH HAZARDS STATEMENT IN EFFECT FROM NOON PST TODAY THROUGH FRIDAY MORNING... The National Weather Service in San Francisco has issued a Beach Hazards Statement for increased risk of sneaker waves, which is in effect from noon PST today through Friday morning. * WAVES AND SURF...West to northwest swell initially 3 to 5 with forerunners at 20 to 22 seconds. Swell will build up to 10 feet on Thursday with periods of 18 to 20 seconds. * HAZARDS...Increased risk of sneaker waves on northern and central California beaches. * TIMING...Wednesday afternoon through Friday morning. * LOCATION...Coastline from Sonoma County south through Monterey county. In particular west to northwest facing beaches... including but not limited to...Ocean Beach...Montara State Beach and Marina State Beach. * POTENTIAL IMPACTS...Steep beaches will have a higher risk of sneaker wave activity with greater wave run-up onto beaches than normally expected. Unsuspecting beach-goers may suddenly be pulled out to sea. Never turn your back to the ocean! 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. && $$
6 follow-up statements
580 WHUS46 KMTR 052153 CFWMTR Coastal Hazard Message National Weather Service San Francisco Bay Area 153 PM PST Wed Dec 5 2018 CAZ006-505-509-529-530-060600- /O.CON.KMTR.BH.S.0007.000000T0000Z-181207T1600Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 153 PM PST Wed Dec 5 2018 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH FRIDAY MORNING... * WAVES AND SURF...West to northwest swell initially 3 to 5 with forerunners at 20 to 22 seconds. Swell will build up to 10 feet on Thursday with periods of 18 to 20 seconds. * HAZARDS...Increased risk of sneaker waves on northern and central California beaches. * TIMING...Wednesday afternoon through Friday morning. * LOCATION...Coastline from Sonoma County south through Monterey county. In particular west to northwest facing beaches... including but not limited to...Ocean Beach...Montara State Beach and Marina State Beach. * POTENTIAL IMPACTS...Steep beaches will have a higher risk of sneaker wave activity with greater wave run-up onto beaches than normally expected. Unsuspecting beach-goers may suddenly be pulled out to sea. Never turn your back to the ocean! PRECAUTIONARY/PREPAREDNESS ACTIONS... A Beach Hazard Statement for sneaker waves means that conditions are present to support a heightened risk of unsuspecting beach goers being swept into the sea by a wave. People walking along the beach should never turn their back to the sea. Fisherman should avoid fishing from rocks or jetties. && $$
862 WHUS46 KMTR 060448 CFWMTR Coastal Hazard Message National Weather Service San Francisco Bay Area 848 PM PST Wed Dec 5 2018 CAZ006-505-509-529-530-061800- /O.CON.KMTR.BH.S.0007.000000T0000Z-181207T1600Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 848 PM PST Wed Dec 5 2018 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH FRIDAY MORNING... * WAVES AND SURF...West to northwest swell initially 3 to 5 with forerunners at 18 to 20 seconds. Swell will build up to 10 feet on Thursday. * HAZARDS...Increased risk of sneaker waves on northern and central California beaches. * TIMING...Thursday through Friday morning. * LOCATION...Coastline from Sonoma County south through Monterey county. In particular west to northwest facing beaches... including but not limited to...Ocean Beach...Montara State Beach and Marina State Beach. * POTENTIAL IMPACTS...Steep beaches will have a higher risk of sneaker wave activity with greater wave run-up onto beaches than normally expected. Unsuspecting beach-goers may suddenly be pulled out to sea. Never turn your back to the ocean! 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. && $$
732 WHUS46 KMTR 061103 CFWMTR Coastal Hazard Message National Weather Service San Francisco Bay Area 303 AM PST Thu Dec 6 2018 ...INCREASED RISK OF SNEAKER WAVES THROUGH FRIDAY... CAZ006-505-509-529-530-062200- /O.CON.KMTR.BH.S.0007.000000T0000Z-181207T1600Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 303 AM PST Thu Dec 6 2018 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH FRIDAY MORNING... * WAVES AND SURF...West to northwest swell building to 10 feet at 18 to 20 seconds over the open ocean. Breaking waves of 17 to 20 feet will be possible. * HAZARDS...Increased risk of sneaker waves on northern and central California beaches. * TIMING...Today through Friday morning. * LOCATION...Coastline from Sonoma County south through Monterey county. In particular west to northwest facing beaches... including but not limited to...Ocean Beach...Montara State Beach...Asilomar State Beach and Marina State Beach. * POTENTIAL IMPACTS...Steep beaches will have a higher risk of sneaker wave activity with greater wave run-up onto beaches than normally expected. Unsuspecting beach-goers may suddenly be pulled out to sea. Never turn your back to the ocean! PRECAUTIONARY/PREPAREDNESS ACTIONS... A Beach Hazard Statement for sneaker waves means that conditions are present to support a heightened risk of unsuspecting beach goers being swept into the sea by a wave. People walking along the beach should never turn their back to the sea. Fisherman should avoid fishing from rocks or jetties. && $$
571 WHUS46 KMTR 062132 CFWMTR Coastal Hazard Message National Weather Service San Francisco Bay Area 132 PM PST Thu Dec 6 2018 ...INCREASED RISK OF SNEAKER WAVES THROUGH FRIDAY... CAZ006-505-509-529-530-070700- /O.CON.KMTR.BH.S.0007.000000T0000Z-181207T1600Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 132 PM PST Thu Dec 6 2018 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH FRIDAY MORNING... * WAVES AND SURF...West to northwest swell building to 10 feet at 18 to 20 seconds over the open ocean. Breaking waves of 17 to 20 feet will be possible. * HAZARDS...Increased risk of sneaker waves on northern and central California beaches. * TIMING...Today through Friday morning. * LOCATION...Coastline from Sonoma County south through Monterey county. In particular west to northwest facing beaches... including but not limited to...Ocean Beach...Montara State Beach...Asilomar State Beach and Marina State Beach. * POTENTIAL IMPACTS...Steep beaches will have a higher risk of sneaker wave activity with greater wave run-up onto beaches than normally expected. Unsuspecting beach-goers may suddenly be pulled out to sea. Never turn your back to the ocean! 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. && $$
864 WHUS46 KMTR 070658 CFWMTR Coastal Hazard Message National Weather Service San Francisco Bay Area 1058 PM PST Thu Dec 6 2018 ...INCREASED RISK OF SNEAKER WAVES THROUGH FRIDAY... CAZ006-505-509-529-530-071600- /O.CON.KMTR.BH.S.0007.000000T0000Z-181207T1600Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 1058 PM PST Thu Dec 6 2018 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT UNTIL 8 AM PST FRIDAY... * WAVES AND SURF...West to northwest swell building to 10 feet at 18 to 20 seconds over the open ocean. Breaking waves of 17 to 20 feet will be possible. * HAZARDS...Increased risk of sneaker waves on northern and central California beaches. * TIMING...Tonight through Friday morning. * LOCATION...Coastline from Sonoma County south through Monterey county. In particular west to northwest facing beaches... including but not limited to...Ocean Beach...Montara State Beach...Asilomar State Beach and Marina State Beach. * POTENTIAL IMPACTS...Steep beaches will have a higher risk of sneaker wave activity with greater wave run-up onto beaches than normally expected. Unsuspecting beach-goers may suddenly be pulled out to sea. Never turn your back to the ocean! PRECAUTIONARY/PREPAREDNESS ACTIONS... A Beach Hazard Statement for sneaker waves means that conditions are present to support a heightened risk of unsuspecting beach goers being swept into the sea by a wave. People walking along the beach should never turn their back to the sea. Fisherman should avoid fishing from rocks or jetties. && $$
353 WHUS46 KMTR 071553 CFWMTR Coastal Hazard Message National Weather Service San Francisco Bay Area 753 AM PST Fri Dec 7 2018 CAZ006-505-509-529-530-071700- /O.EXP.KMTR.BH.S.0007.000000T0000Z-181207T1600Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 753 AM PST Fri Dec 7 2018 ...BEACH HAZARDS STATEMENT WILL EXPIRE AT 8 AM PST THIS MORNING... * WAVES AND SURF...Wave heights and wave periods will gradually decrease through the day reducing the risk for sneaker waves. Beach goers should still use caution as some lingering rough surf will still be possible. 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. && $$
Nearby
Beach Hazards Statements in California, 2018Every beach hazards statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.