Alert archive / California / Beach Hazards Statements in 2020
Beach Hazards Statement 5, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this beach hazards statement at Apr 6, 2020, 4:10 AM PDT for 6 counties in California. It took effect at Apr 7, 2020, 5:00 AM PDT. It was in force for 24 hr.
The area
The counties it named.
The facts
- Issued
- Apr 6, 2020, 4:10 AM PDT (11:10 UTC)
- In effect from
- Apr 7, 2020, 5:00 AM PDT
- Expired
- Apr 8, 2020, 5:00 AM PDT
- In force
- 24 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 11:10 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, 11.2 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
- 14 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 903 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 18 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
039 WHUS46 KMTR 061110 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 410 AM PDT Mon Apr 6 2020 ...Increasing risk of sneaker waves and strong rip currents from Coastal Sonoma County to Coastal Monterey County 5 am Tuesday to 5 am Wednesday... .A long period southwest to west swell will impact the coastline beginning early Tuesday morning and will continue into Wednesday morning before subsiding. Energetic swell periods will reach 19 to 20 seconds Tuesday morning then decrease to below 17 seconds by Wednesday afternoon and evening. CAZ006-505-509-529-530-070800- /O.NEW.KMTR.BH.S.0005.200407T1200Z-200408T1200Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 410 AM PDT Mon Apr 6 2020 ...BEACH HAZARDS STATEMENT IN EFFECT FROM 5 AM PDT TUESDAY THROUGH 5 AM PDT WEDNESDAY... * WHAT...Sneaker waves and strong rip currents. * WHERE...Coastal Sonoma County to Coastal Monterey County. * WHEN...5 AM PDT Tuesday to 5 AM PDT Wednesday. * 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... Sneaker waves heighten the 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. && $$
4 follow-up statements
223 WHUS46 KMTR 070732 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 1232 AM PDT Tue Apr 7 2020 ...Increasing risk of sneaker waves and strong rip currents from Coastal Sonoma County to Coastal Monterey County 5 am Tuesday to 5 am Wednesday... .A long period southwest to west swell will impact the coastline beginning early Tuesday morning and will continue into Wednesday morning before subsiding. Energetic swell periods will reach 19 to 20 seconds Tuesday morning then decrease to below 17 seconds by Wednesday afternoon and evening. CAZ006-505-509-529-530-072200- /O.CON.KMTR.BH.S.0005.200407T1200Z-200408T1200Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 1232 AM PDT Tue Apr 7 2020 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM 5 AM PDT EARLY THIS MORNING THROUGH LATE TONIGHT... * WHAT...Sneaker waves and strong rip currents. * WHERE...Coastal Sonoma County to Coastal Monterey County. * WHEN...5 AM PDT Tuesday to 5 AM PDT Wednesday. * IMPACTS...Sneaker waves can knock unsuspecting beach goers over and into the sea. Rip currents can pull swimmers and surfers out to sea. * ADDITIONAL DETAILS...Steep beaches will have a higher risk of sneaker wave and rip current activity with greater wave run-up onto beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Sneaker waves heighten the risk of unsuspecting beach goers being swept into the sea by a wave. Rip currents are typically more frequent and stronger in the vicinity of jetties...inlets...and piers. People walking along the beach should never turn their back to the sea. Fisherman should avoid fishing from rocks or jetties. Remain out of the water to avoid hazardous swimming conditions. Anyone caught in a rip current should swim parallel to the coast to escape the rip current before trying to swim for shore. && $$
429 WHUS46 KMTR 072129 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 229 PM PDT Tue Apr 7 2020 ...Increasing risk of sneaker waves and strong rip currents from Coastal Sonoma County to Coastal Monterey County until 5 AM Wednesday... .A long period southwest to west swell will continue to impact the coastline into Wednesday morning before subsiding. Energetic swell periods of 18 to 20 seconds will persist into tonight and then decrease to below 17 seconds by Wednesday afternoon and evening. CAZ006-505-509-529-530-080900- /O.CON.KMTR.BH.S.0005.000000T0000Z-200408T1200Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 229 PM PDT Tue Apr 7 2020 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH LATE TONIGHT... * WHAT...Sneaker waves and strong rip currents. * WHERE...Coastal Sonoma County to Coastal Monterey County. * WHEN...5 AM PDT Tuesday to 5 AM PDT Wednesday. * 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... Sneaker waves heighten the 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. && $$
520 WHUS46 KMTR 080839 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 139 AM PDT Wed Apr 8 2020 ...Increasing risk of sneaker waves and strong rip currents from Coastal Sonoma County to Coastal Monterey County until 5 AM Wednesday... .A long period southwest to west swell will continue to impact the coastline into Wednesday morning before subsiding. Energetic swell periods of 18 to 20 seconds will persist into tonight and then decrease to below 17 seconds by Wednesday afternoon and evening. CAZ006-505-509-529-530-081200- /O.CON.KMTR.BH.S.0005.000000T0000Z-200408T1200Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 139 AM PDT Wed Apr 8 2020 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT UNTIL 5 AM PDT EARLY THIS MORNING... * WHAT...Sneaker waves and strong rip currents. * WHERE...Coastal Sonoma County to Coastal Monterey County. * WHEN...5 AM PDT Tuesday to 5 AM PDT Wednesday. * IMPACTS...Sneaker waves can knock unsuspecting beach goers over and into the sea. Rip currents can pull swimmers and surfers out to sea. * ADDITIONAL DETAILS...Steep beaches will have a higher risk of sneaker wave and rip current activity with greater wave run-up onto beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Sneaker waves heighten the risk of unsuspecting beach goers being swept into the sea by a wave. Rip currents are typically more frequent and stronger in the vicinity of jetties...inlets...and piers. People walking along the beach should never turn their back to the sea. Fisherman should avoid fishing from rocks or jetties. Remain out of the water to avoid hazardous swimming conditions. Anyone caught in a rip current should swim parallel to the coast to escape the rip current before trying to swim for shore. && $$
123 WHUS46 KMTR 081136 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 436 AM PDT Wed Apr 8 2020 CAZ006-505-509-529-530-081245- /O.EXP.KMTR.BH.S.0005.000000T0000Z-200408T1200Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 436 AM PDT Wed Apr 8 2020 ...BEACH HAZARDS STATEMENT WILL EXPIRE AT 5 AM PDT EARLY THIS MORNING... The long period swell continues to slowly decrease below hazard criteria, thereby allowing the advisory statement to expire. Never turn your back to the ocean. $$
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.