Alert archive / California / Beach Hazards Statements in 2020
Beach Hazards Statement 2, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this beach hazards statement at Jan 23, 2020, 1:31 AM PST for 6 counties in California. It took effect at Jan 24, 2020, 3:00 AM PST. It was in force for 32 hr.
The area
The counties it named.
The facts
- Issued
- Jan 23, 2020, 1:31 AM PST (09:31 UTC)
- In effect from
- Jan 24, 2020, 3:00 AM PST
- Expired
- Jan 25, 2020, 11:00 AM PST
- In force
- 32 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 09:37 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, 9.5 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
- 1100 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- -22 m²/s²
- 0-3 km storm-relative helicity
- 39 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
926 WHUS46 KMTR 230931 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 131 AM PST Thu Jan 23 2020 ...Increased Sneaker Wave and Rip Current Risk Thursday night through Friday... .A relatively large, long period WNW swell train will begin to move into the waters later today. The longer period forerunner waves of 18-23 seconds in the range of 3 to 7 feet will lead to an increased risk of sneaker waves and rip currents along the Pacific coastline primarily from late tonight through Friday. CAZ006-505-509-529-530-232300- /O.NEW.KMTR.BH.S.0002.200124T1100Z-200125T0500Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 131 AM PST Thu Jan 23 2020 ...BEACH HAZARDS STATEMENT IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY EVENING... * WHAT...Increased risk of sneaker waves and rip currents are expected. * WHERE...San Francisco, Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast, Northern Monterey Bay and Southern Monterey Bay and Big Sur Coast Counties. * WHEN...From late tonight through Friday evening. * IMPACTS... Rip currents can pull swimmers and surfers out to sea. Sneaker waves can knock unsuspecting beach goers over and into the sea. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water due to dangerous surf conditions, or stay near occupied lifeguard towers. Rock jetties can be deadly in such conditions, stay off the rocks. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. && $$
7 follow-up statements
107 WHUS46 KMTR 232126 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 126 PM PST Thu Jan 23 2020 ...Increased Sneaker Wave and Rip Current Risk Late Thursday Night Through Friday... .A relatively large, long period WNW swell train will begin to move into the waters later today. The longer period forerunner waves of 18 to 23 seconds in the range of 3 to 7 feet will lead to an increased risk of sneaker waves and rip currents along the Pacific coastline primarily from late tonight through Friday. CAZ006-505-509-529-530-240700- /O.CON.KMTR.BH.S.0002.200124T1100Z-200125T0500Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 126 PM PST Thu Jan 23 2020 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY EVENING... * WHAT...Increased risk of sneaker waves and rip currents are expected. * WHERE...San Francisco, Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast, Northern Monterey Bay and Southern Monterey Bay and Big Sur Coast Counties. * WHEN...From late tonight through Friday evening. * IMPACTS... Rip currents can pull swimmers and surfers out to sea. Sneaker waves can knock unsuspecting beach goers over and into the sea. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water due to dangerous surf conditions, or stay near occupied lifeguard towers. Rock jetties can be deadly in such conditions, stay off the rocks. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. && $$
696 WHUS46 KMTR 240635 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 1035 PM PST Thu Jan 23 2020 ...Increased Sneaker Wave and Rip Current Risk Late Tonight Through Friday... .A relatively large, long period WNW swell train has begun to move into the coastal waters and will increase tonight through Friday. The longer period forerunner waves of 18 to 23 seconds in the range of 3 to 7 feet will lead to an increased risk of sneaker waves and rip currents along the Pacific coastline primarily from late tonight through Friday. CAZ006-505-509-529-530-241500- /O.CON.KMTR.BH.S.0002.200124T1100Z-200125T0500Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 1035 PM PST Thu Jan 23 2020 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM 3 AM PST FRIDAY THROUGH FRIDAY EVENING... * WHAT...Increased risk of sneaker waves and rip currents are expected. * WHERE...San Francisco, Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast, Northern Monterey Bay and Southern Monterey Bay and Big Sur Coast Counties. * WHEN...From late tonight through Friday evening. * IMPACTS... Rip currents can pull swimmers and surfers out to sea. Sneaker waves can knock unsuspecting beach goers over and into the sea. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water due to dangerous surf conditions, or stay near occupied lifeguard towers. Rock jetties can be deadly in such conditions, stay off the rocks. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. && $$
555 WHUS46 KMTR 241341 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 541 AM PST Fri Jan 24 2020 ...Increased Sneaker Wave and Rip Current Risk Through Friday Evening... .A relatively large, long period WNW swell train has begun to move into the coastal waters and will increase through this evening, leading to an increased risk of sneaker waves and rip currents along the Pacific coastline. CAZ006-505-509-529-530-250500- /O.CON.KMTR.BH.S.0002.000000T0000Z-200125T0500Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 541 AM PST Fri Jan 24 2020 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH THIS EVENING... * WHAT...Increased risk of sneaker waves and rip currents are expected. * WHERE...Coastal North Bay Including Point Reyes National Seashore, Southern Monterey Bay and Big Sur Coast, San Francisco Peninsula Coast, San Francisco and Northern Monterey Bay Counties. * WHEN...Through this evening. * IMPACTS... Rip currents can pull swimmers and surfers out to sea. Sneaker waves can knock unsuspecting beach goers over and into the sea. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water due to dangerous surf conditions, or stay near occupied lifeguard towers. Rock jetties can be deadly in such conditions, stay off the rocks. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. && $$
547 WHUS46 KMTR 242047 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 1247 PM PST Fri Jan 24 2020 ...Increased Risk of Sneaker Waves, Rip Currents, and Large Shore Break through Saturday Morning... .A relatively large, long period WNW swell train has begun to move into the coastal waters and will increase through this evening, leading to an increased risk of sneaker waves and rip currents along the Pacific coastline. As swells build, expect breaking wave heights of 15 to 20 feet. CAZ006-505-509-529-530-250915- /O.EXT.KMTR.BH.S.0002.000000T0000Z-200125T1900Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 1247 PM PST Fri Jan 24 2020 ...BEACH HAZARDS STATEMENT NOW IN EFFECT THROUGH SATURDAY MORNING... * WHAT...Increased risk of sneaker waves, rip currents, and large shore break are expected. * WHERE...Coastal North Bay Including Point Reyes National Seashore, Southern Monterey Bay and Big Sur Coast, San Francisco Peninsula Coast, San Francisco and Northern Monterey Bay Counties. * WHEN...Through 11 AM PST Saturday. * IMPACTS... Rip currents can pull swimmers and surfers out to sea. Sneaker waves can knock unsuspecting beach goers over and into the sea. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water due to dangerous surf conditions, or stay near occupied lifeguard towers. Swimmers should avoid swimming in areas of large shore break. Rock jetties can be deadly in such conditions, stay off the rocks. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. && $$
286 WHUS46 KMTR 250632 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 1032 PM PST Fri Jan 24 2020 ...Increased Risk of Sneaker Waves, Rip Currents, and Large Shore Break through Saturday Morning... .A relatively large, long period WNW swell will continue to impact the coast through Saturday morning, leading to an increased risk of sneaker waves and rip currents along the Pacific coastline. Additionally, breaking wave heights of 15 to 20 feet will be possible. CAZ006-505-509-529-530-251500- /O.CON.KMTR.BH.S.0002.000000T0000Z-200125T1900Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 1032 PM PST Fri Jan 24 2020 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH SATURDAY MORNING... * WHAT...Increased risk of sneaker waves, rip currents, and large shore break are expected. * WHERE...Coastal North Bay Including Point Reyes National Seashore, Southern Monterey Bay and Big Sur Coast, San Francisco Peninsula Coast, San Francisco and Northern Monterey Bay Counties. * WHEN...Through 11 AM PST Saturday. * IMPACTS... Rip currents can pull swimmers and surfers out to sea. Sneaker waves can knock unsuspecting beach goers over and into the sea. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water due to dangerous surf conditions, or stay near occupied lifeguard towers. Swimmers should avoid swimming in areas of large shore break. Rock jetties can be deadly in such conditions, stay off the rocks. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. && $$
428 WHUS46 KMTR 251339 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 539 AM PST Sat Jan 25 2020 ...Increased Risk of Sneaker Waves, Rip Currents, and Large Shore Break through Saturday Morning... .A relatively large, long period WNW swell will continue to impact the coast through Saturday morning, leading to an increased risk of sneaker waves and rip currents along the Pacific coastline. Additionally, breaking wave heights of 15 to 20 feet will be possible. CAZ006-505-509-529-530-251900- /O.CON.KMTR.BH.S.0002.000000T0000Z-200125T1900Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 539 AM PST Sat Jan 25 2020 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT UNTIL 11 AM PST THIS MORNING... * WHAT...Increased risk of sneaker waves, rip currents, and large shore break are expected. * WHERE...Coastal North Bay Including Point Reyes National Seashore, Southern Monterey Bay and Big Sur Coast, San Francisco Peninsula Coast, San Francisco and Northern Monterey Bay Counties. * WHEN...Through 11 AM PST Saturday. * IMPACTS... Rip currents can pull swimmers and surfers out to sea. Sneaker waves can knock unsuspecting beach goers over and into the sea. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water due to dangerous surf conditions, or stay near occupied lifeguard towers. Swimmers should avoid swimming in areas of large shore break. Rock jetties can be deadly in such conditions, stay off the rocks. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. && $$
298 WHUS46 KMTR 251851 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 1051 AM PST Sat Jan 25 2020 CAZ006-505-509-529-530-252000- /O.EXP.KMTR.BH.S.0002.000000T0000Z-200125T1900Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 1051 AM PST Sat Jan 25 2020 ...BEACH HAZARDS STATEMENT WILL EXPIRE AT 11 AM PST THIS MORNING... Buoy observations indicate wave energy is falling below criteria for a beach hazard statement. A few larger waves may still be present with this wave set into the afternoon hours. && $$
The office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 23, 2:38 AM PST | Small Craft Advisory | MTR | 60 hr |
Nearby
Beach Hazards Statements in California, 2020Every beach hazards statement in 2020
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.