Alert archive / California / Beach Hazards Statements in 2019
Beach Hazards Statement 7, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this beach hazards statement at Nov 21, 2019, 1:37 PM PST for 6 counties in California. It took effect at Nov 22, 2019, 4:00 AM PST. It was in force for 36 hr.
The area
The counties it named.
The facts
- Issued
- Nov 21, 2019, 1:37 PM PST (21:37 UTC)
- In effect from
- Nov 22, 2019, 4:00 AM PST
- Expired
- Nov 23, 2019, 4:00 PM PST
- In force
- 36 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 21:36 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, 9.6 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
- 1517 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- 63 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
235 WHUS46 KMTR 212137 CFWMTR Coastal Hazard Message National Weather Service San Francisco Bay Area 137 PM PST Thu Nov 21 2019 ...INCREASED RISK OF SNEAKER WAVES LATE TONIGHT THROUGH LATE FRIDAY NIGHT... .A long period west-northwest swell will impact the coastline from Sonoma southward through Big Sur beginning late tonight. Forerunner waves will arrive late this evening but the greatest risk of sneaker waves impacting the coast will exist from late tonight through late Friday night. These sneaker waves will be infrequent waves powerful enough to knock unsuspecting people into the ocean during otherwise deceptively light seas. CAZ006-505-509-529-530-220700- /O.NEW.KMTR.BH.S.0007.191122T1200Z-191123T1200Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 137 PM PST Thu Nov 21 2019 ...BEACH HAZARDS STATEMENT IN EFFECT FROM LATE TONIGHT THROUGH LATE FRIDAY NIGHT... The National Weather Service in San Francisco has issued a Beach Hazards Statement for increased sneaker wave risk, which is in effect from late tonight through late Friday night. * HAZARDS...Increased sneaker wave risk. * TIMING...From 4 AM Friday to 4 AM Saturday. * LOCATION...Entire Pacific coastline from Sonoma south to Big Sur. * POTENTIAL IMPACTS...Larger surf at offshore breaks and an enhanced risk of sneaker waves on northwest California beaches. Steep beaches will have a higher risk of sneaker wave activity with greater wave run-up onto beaches. Large waves will also wash over jetties and rock outcroppings that may normally stay dry. 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. && $$
5 follow-up statements
544 WHUS46 KMTR 220414 CFWMTR Coastal Hazard Message National Weather Service San Francisco Bay Area 814 PM PST Thu Nov 21 2019 ...INCREASED RISK OF SNEAKER WAVES LATE TONIGHT THROUGH LATE FRIDAY NIGHT... .A long period west-northwest swell will impact the coastline from Sonoma southward through Big Sur beginning late tonight. Forerunner waves will arrive late this evening but the greatest risk of sneaker waves impacting the coast will exist from late tonight through late Friday night. These sneaker waves will be infrequent waves powerful enough to knock unsuspecting people into the ocean during otherwise deceptively light seas. CAZ006-505-509-529-530-221800- /O.CON.KMTR.BH.S.0007.191122T1200Z-191123T1200Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 814 PM PST Thu Nov 21 2019 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM 4 AM PST FRIDAY THROUGH LATE FRIDAY NIGHT... * HAZARDS...Increased sneaker wave risk. * TIMING...From 4 AM Friday to 4 AM Saturday. * LOCATION...Entire Pacific coastline from Sonoma south to Big Sur. * POTENTIAL IMPACTS...Larger surf at offshore breaks and an enhanced risk of sneaker waves on northwest California beaches. Steep beaches will have a higher risk of sneaker wave activity with greater wave run-up onto beaches. Large waves will also wash over jetties and rock outcroppings that may normally stay dry. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Beach Hazard Statement for sneaker waves means that conditions are present to support a heightened risk of unsuspecting beach goers being swept into the sea by a wave. People walking along the beach should never turn their back to the sea. Fisherman should avoid fishing from rocks or jetties. && $$
458 WHUS46 KMTR 221559 CFWMTR Coastal Hazard Message National Weather Service San Francisco Bay Area 759 AM PST Fri Nov 22 2019 ...INCREASED RISK OF SNEAKER WAVES THROUGH LATE TONIGHT... .There is a long period west-northwest swell which will impact the coastline from Sonoma southward through Big Sur. Forerunner waves will continue to impact the coast into early Saturday morning. These sneaker waves will be infrequent waves powerful enough to knock unsuspecting people into the ocean during otherwise deceptively light seas. CAZ006-505-509-529-530-230000- /O.CON.KMTR.BH.S.0007.000000T0000Z-191123T1200Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 759 AM PST Fri Nov 22 2019 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH LATE TONIGHT... * HAZARDS...Increased sneaker wave risk. * TIMING...Through 4 AM Saturday. * LOCATION...Entire Pacific coastline from Sonoma south to Big Sur. * POTENTIAL IMPACTS...Larger surf at offshore breaks and an enhanced risk of sneaker waves on northwest California beaches. Steep beaches will have a higher risk of sneaker wave activity with greater wave run-up onto beaches. Large waves will also wash over jetties and rock outcroppings that may normally stay dry. 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. && $$
158 WHUS46 KMTR 222246 CFWMTR Coastal Hazard Message National Weather Service San Francisco Bay Area 246 PM PST Fri Nov 22 2019 ...INCREASED RISK OF SNEAKER WAVES AND RIP CURRENTS THROUGH SATURDAY AFTERNOON... .Long period swells have arrived and will continue to impact area beaches through Saturday afternoon. Nice weather and upcoming holiday may draw more people than normal to area beaches this weekend. Please use caution as sneaker waves and rip currents will be likely. CAZ006-505-509-529-530-231400- /O.EXT.KMTR.BH.S.0007.000000T0000Z-191124T0000Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 246 PM PST Fri Nov 22 2019 ...BEACH HAZARDS STATEMENT NOW IN EFFECT THROUGH SATURDAY AFTERNOON... * HAZARDS...Increased sneaker wave and rip current risk. * TIMING...Through 5 PM Saturday. * LOCATION...Coastline from Sonoma south to Big Sur. * POTENTIAL IMPACTS...Larger surf at offshore breaks and an enhanced risk of sneaker waves on area beaches. Steep beaches will have a higher risk of sneaker wave activity with greater wave run-up onto beaches. Large waves will also wash over jetties and rock outcroppings that may normally stay dry. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Beach Hazard Statement for sneaker waves means that conditions are present to support a heightened risk of unsuspecting beach goers being swept into the sea by a wave. People walking along the beach should never turn their back to the sea. Fisherman should avoid fishing from rocks or jetties. && $$
371 WHUS46 KMTR 231445 CFWMTR Coastal Hazard Message National Weather Service San Francisco Bay Area 645 AM PST Sat Nov 23 2019 ...INCREASED RISK OF SNEAKER WAVES AND RIP CURRENTS THROUGH SATURDAY AFTERNOON... .Long period swells have arrived and will continue to impact area beaches through Saturday afternoon. Nice weather and upcoming holiday may draw more people than normal to area beaches this weekend. Please use caution as sneaker waves and rip currents will be likely. CAZ006-505-509-529-530-240000- /O.CON.KMTR.BH.S.0007.000000T0000Z-191124T0000Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 645 AM PST Sat Nov 23 2019 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT UNTIL 4 PM PST THIS AFTERNOON... * HAZARDS...Increased sneaker wave and rip current risk. * TIMING...Through 5 PM Saturday. * LOCATION...Coastline from Sonoma south to Big Sur. * POTENTIAL IMPACTS...Larger surf at offshore breaks and an enhanced risk of sneaker waves on area beaches. Steep beaches will have a higher risk of sneaker wave activity with greater wave run-up onto beaches. Large waves will also wash over jetties and rock outcroppings that may normally stay dry. 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. && $$
172 WHUS46 KMTR 232355 CFWMTR Coastal Hazard Message National Weather Service San Francisco Bay Area 355 PM PST Sat Nov 23 2019 CAZ006-505-509-529-530-240100- /O.EXP.KMTR.BH.S.0007.000000T0000Z-191124T0000Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 355 PM PST Sat Nov 23 2019 ...BEACH HAZARDS STATEMENT WILL EXPIRE AT 4 PM PST THIS AFTERNOON... The long period northwest swell which prompted the Beach Hazards Statement has decreased, and the threat of sneaker waves and rip currents have also decreased. However, waves at the beach will continue to be larger than normal and beachgoers should exercise caution near the water. Never turn your back to the ocean! $$
The office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 20, 9:21 PM PST | Small Craft Advisory | MTR | 6 hr | |
| Nov 21, 2:39 PM PST | Small Craft Advisory | MTR | 24 hr |
Nearby
Beach Hazards Statements in California, 2019Every beach hazards statement in 2019
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.