Alert archive / California / Beach Hazards Statements in 2020
Beach Hazards Statement 4, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this beach hazards statement at Mar 20, 2020, 12:56 PM PDT for 6 counties in California. It took effect at Mar 21, 2020, 8:00 PM PDT. It was in force for 31 hr.
The area
The counties it named.
The facts
- Issued
- Mar 20, 2020, 12:56 PM PDT (19:56 UTC)
- In effect from
- Mar 21, 2020, 8:00 PM PDT
- Expired
- Mar 23, 2020, 3:00 AM PDT
- In force
- 31 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 19:58 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 12:00Z, 7.9 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
- 3 J/kg
- Mixed-layer CIN
- -50 J/kg
- Mixed-layer LCL
- 770 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- -20 m²/s²
- 0-3 km storm-relative helicity
- -6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
896 WHUS46 KMTR 201956 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 1256 PM PDT Fri Mar 20 2020 ...Increased Risk of Sneaker Waves and Rip Currents Saturday Evening until late Sunday Night... .A long period northwest swell will move into the coastal waters Saturday evening increasing the risk of sneaker waves and rip currents along the coastline from Sonoma County through Monterey County. The greatest risk for sneaker waves will occur Saturday evening through Sunday morning. Northwest swell of 2 to 5 feet at 18 to 21 seconds is anticipated. Swell periods will gradually decrease Sunday night and Monday. CAZ006-505-509-529-530-210400- /O.NEW.KMTR.BH.S.0004.200322T0300Z-200323T1000Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 1256 PM PDT Fri Mar 20 2020 ...BEACH HAZARDS STATEMENT IN EFFECT FROM SATURDAY EVENING THROUGH LATE SUNDAY NIGHT... * WHAT...Increased risk of sneaker waves and rip currents are expected. * WHERE...Coastline from Sonoma County southward through Monterey County. In particular west to northwest facing beaches...including but not limited to...Ocean Beach...Montara State Beach and Marina State Beach.. * WHEN...From Saturday evening through late Sunday night. * IMPACTS...Sneaker waves can knock unsuspecting beach goers over and into the sea. Rip currents can pull swimmers and surfers out to sea. * ADDITIONAL DETAILS...Steep beaches will have a higher risk of sneaker wave and rip current activity with greater wave run-up onto beaches. 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. Rip currents are typically more frequent and stronger in the vicinity of jetties...inlets...and piers. People walking along the beach should never turn their back to the sea. Fisherman should avoid fishing from rocks or jetties. Remain out of the water to avoid hazardous swimming conditions. Anyone caught in a rip current should swim parallel to the coast to escape the rip current before trying to swim for shore. && $$
6 follow-up statements
596 WHUS46 KMTR 210619 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 1119 PM PDT Fri Mar 20 2020 ...Increased Risk of Sneaker Waves and Rip Currents Saturday Evening until late Sunday Night... .A long period northwest swell will move into the coastal waters Saturday evening increasing the risk of sneaker waves and rip currents along the coastline from Sonoma County through Monterey County. The greatest risk for sneaker waves will occur Saturday evening through Sunday morning. Northwest swell of 2 to 5 feet at 18 to 21 seconds is anticipated. Swell periods will gradually decrease Sunday night and Monday. CAZ006-505-509-529-530-211700- /O.CON.KMTR.BH.S.0004.200322T0300Z-200323T1000Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 1119 PM PDT Fri Mar 20 2020 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM SATURDAY EVENING THROUGH LATE SUNDAY NIGHT... * WHAT...Increased risk of sneaker waves and rip currents are expected. * WHERE...Coastline from Sonoma County southward through Monterey County. In particular west to northwest facing beaches... including but not limited to...Ocean Beach... Montara State Beach and Marina State Beach.. * WHEN...From Saturday evening through late Sunday night. * IMPACTS...Sneaker waves can knock unsuspecting beach goers over and into the sea. Rip currents can pull swimmers and surfers out to sea. * ADDITIONAL DETAILS...Steep beaches will have a higher risk of sneaker wave and rip current activity with greater wave run-up onto beaches. 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. Rip currents are typically more frequent and stronger in the vicinity of jetties... inlets...and piers. People walking along the beach should never turn their back to the sea. Fisherman should avoid fishing from rocks or jetties. Remain out of the water to avoid hazardous swimming conditions. Anyone caught in a rip current should swim parallel to the coast to escape the rip current before trying to swim for shore. && $$
437 WHUS46 KMTR 211547 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 847 AM PDT Sat Mar 21 2020 ...Increased Risk of Sneaker Waves and Rip Currents from this Evening until late Sunday Night... .A long period northwest swell will move into the coastal waters this evening increasing the risk of sneaker waves and rip currents along the coastline from Sonoma County through Monterey County. The greatest risk for sneaker waves will occur Saturday evening through Sunday morning. Northwest swell of 2 to 5 feet at 18 to 21 seconds is anticipated. Swell periods will gradually decrease Sunday night and Monday. CAZ006-505-509-529-530-221000- /O.CON.KMTR.BH.S.0004.200322T0300Z-200323T1000Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 847 AM PDT Sat Mar 21 2020 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM 8 PM PDT THIS EVENING THROUGH LATE SUNDAY NIGHT... * 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...From 8 PM PDT this evening through late Sunday night. * IMPACTS...Sneaker waves can knock unsuspecting beach goers over and into the sea. Rip currents can pull swimmers and surfers out to sea. * ADDITIONAL DETAILS...Steep beaches will have a higher risk of sneaker wave and rip current activity with greater wave run-up onto beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$
028 WHUS46 KMTR 220546 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 1046 PM PDT Sat Mar 21 2020 ...Increased Risk of Sneaker Waves and Rip Currents from this Evening until late Sunday Night... .A long period northwest swell will move into the coastal waters this evening increasing the risk of sneaker waves and rip currents along the coastline from Sonoma County through Monterey County. The greatest risk for sneaker waves will occur Saturday evening through Sunday morning. Northwest swell of 2 to 5 feet at 18 to 21 seconds is anticipated. Swell periods will gradually decrease Sunday night and Monday. CAZ006-505-509-529-530-221400- /O.CON.KMTR.BH.S.0004.000000T0000Z-200323T1000Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 1046 PM PDT Sat Mar 21 2020 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH LATE SUNDAY NIGHT... * WHAT...Increased risk of sneaker waves and rip currents are expected. * WHERE...Coastal North Bay Including Point Reyes National Seashore, Southern Monterey Bay and Big Sur Coast, San Francisco Peninsula Coast, San Francisco and Northern Monterey Bay Counties. * WHEN...Through late Sunday night. * IMPACTS...Sneaker waves can knock unsuspecting beach goers over and into the sea. Rip currents can pull swimmers and surfers out to sea. * ADDITIONAL DETAILS...Steep beaches will have a higher risk of sneaker wave and rip current activity with greater wave run-up onto beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$
535 WHUS46 KMTR 221003 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 303 AM PDT Sun Mar 22 2020 ...Increased Risk of Sneaker Waves and Rip Currents from this Evening until late Sunday Night... .A long period northwest swell will move into the coastal waters through late Sunday evening, increasing the risk of sneaker waves and rip currents along the coastline from Sonoma County through Monterey County. Northwest swell of 2 to 5 feet at 18 to 21 seconds is anticipated. Swell periods will gradually decrease Sunday night and Monday. CAZ006-505-509-529-530-222200- /O.CON.KMTR.BH.S.0004.000000T0000Z-200323T1000Z/ 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 PDT Sun Mar 22 2020 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH LATE TONIGHT... * 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 late Sunday night. * IMPACTS...Sneaker waves can knock unsuspecting beach goers over and into the sea. Rip currents can pull swimmers and surfers out to sea. * ADDITIONAL DETAILS...Steep beaches will have a higher risk of sneaker wave and rip current activity with greater wave run-up onto beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$
451 WHUS46 KMTR 222201 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 301 PM PDT Sun Mar 22 2020 ...Increased Risk of Sneaker Waves and Rip Currents through late Sunday Night... .A long period northwest swell will pass through the coastal waters through late Sunday night, increasing the risk of sneaker waves and rip currents along the coastline from Sonoma County through Monterey County. Northwest swell of 2 to 5 feet at 18 to 19 seconds is occurring. Swell periods will gradually decrease by Monday. CAZ006-505-509-529-530-231000- /O.CON.KMTR.BH.S.0004.000000T0000Z-200323T1000Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 301 PM PDT Sun Mar 22 2020 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH LATE TONIGHT... * WHAT...Increased risk of sneaker waves and rip currents. * WHERE...Coastal North Bay Including Point Reyes National Seashore, Southern Monterey Bay and Big Sur Coast, San Francisco Peninsula Coast, San Francisco and Northern Monterey Bay Counties. * WHEN...Through late tonight. * IMPACTS...Sneaker waves can knock unsuspecting beach goers over and into the sea. Rip currents can pull swimmers and surfers out to sea. * ADDITIONAL DETAILS...Steep beaches will have a higher risk of sneaker wave and rip current activity with greater wave run-up onto beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$
050 WHUS46 KMTR 230942 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 242 AM PDT Mon Mar 23 2020 ...The Beach Hazard Statement will expire at 3 AM PDT... .Due to continued decreasing period of the northwest swell, the beach hazard statement will be allowed to expire at 3 AM PDT early Monday morning. Caution is still advised for anyone along the coastline as sneaker waves and rip currents may still be present. Remember, never turn your back to the ocean. CAZ006-505-509-529-530-231045- /O.EXP.KMTR.BH.S.0004.000000T0000Z-200323T1000Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 242 AM PDT Mon Mar 23 2020 ...BEACH HAZARDS STATEMENT WILL EXPIRE AT 3 AM PDT EARLY THIS MORNING... $$
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.