Alert archive / California / Small Craft Advisories in 2023

Small Craft Advisory 7, NWS San Francisco Bay Area, CA

January 10, 2023

NWS San Francisco Bay Area, CA issued this small craft advisory at Jan 10, 2023, 3:58 PM PST. It took effect at Jan 11, 2023, 3:00 AM PST. It was in force for 18 hr.

The area

The counties it named.

The facts

Issued
Jan 10, 2023, 3:58 PM PST (23:58 UTC)
In effect from
Jan 11, 2023, 3:00 AM PST
Expired
Jan 11, 2023, 9:00 PM PST
In force
18 hr
Issued by
NWS San Francisco Bay Area, CA

What forecasters said that day

The local office's own words before this small craft advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS San Francisco Bay Area, CA wrote its last area forecast discussion before this small craft advisory went out at Jan 10, 2:27 PM PST, 1 hour 31 minutes earlier.

Area forecast discussion, Jan 10, 2:27 PM PST, 1 hour 31 minutes before
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In the hours before

Local storm report, Jan 10, 2:06 PM PST, 1 hour 52 minutes before
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Special weather statement, Jan 10, 2:36 PM PST, 1 hour 22 minutes before
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Special weather statement, Jan 10, 2:57 PM PST, 1 hour 1 minute before
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Special weather statement, Jan 10, 3:03 PM PST, 55 minutes before
Special Weather Statement
National Weather Service San Francisco CA
303 PM PST Tue Jan 10 2023

CAZ510-515-110000-
East Bay Interior Valleys CA-East Bay Hills CA-
303 PM PST Tue Jan 10 2023

...Strong thunderstorms will impact portions of central Contra Costa
County through 400 PM PST...

At 303 PM PST, Doppler radar was tracking strong thunderstorms along
a line extending from West Pittsburg to Orinda. Movement was east at
25 mph.

HAZARD...Winds in excess of 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Concord, Antioch, Walnut Creek, Pittsburg, Martinez, Oakley, Pleasant
Hill, Lafayette, Brentwood, Orinda, Clayton, Knightsen, West
Pittsburg, West Pittsburg Cdp, Clyde, Waldon, Alamo, Bethel Island,
Pacheco and Vine Hill.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3809 12158 3804 12158 3802 12156 3798 12158
      3798 12157 3783 12176 3789 12225 3806 12202
      3804 12188 3806 12185 3802 12184 3801 12170
      3802 12168 3803 12173 3806 12168 3809 12167
TIME...MOT...LOC 2303Z 265DEG 21KT 3806 12195 3786 12219

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

VMT
Special weather statement, Jan 10, 3:16 PM PST, 42 minutes before
Special Weather Statement
National Weather Service San Francisco CA
316 PM PST Tue Jan 10 2023

CAZ510-102345-
East Bay Interior Valleys CA-
316 PM PST Tue Jan 10 2023

...A strong thunderstorm will impact portions of northwestern Contra
Costa County through 345 PM PST...

At 316 PM PST, Doppler radar was tracking a strong thunderstorm near
Hercules, or near Martinez, moving east at 30 mph.

HAZARD...Winds in excess of 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Concord, Richmond, Pittsburg, Martinez, Pleasant Hill, Hercules,
Pinole, El Sobrante, Clyde, Rodeo, Port Costa, West Pittsburg Cdp,
Pacheco, Vine Hill and Crockett.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3799 12195 3795 12214 3797 12217 3794 12217
      3792 12227 3800 12231 3804 12218 3802 12214
      3806 12203
TIME...MOT...LOC 2316Z 255DEG 28KT 3797 12219

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

VMT
Special weather statement, Jan 10, 3:57 PM PST, 1 minute before
Special Weather Statement
National Weather Service San Francisco CA
357 PM PST Tue Jan 10 2023

CAZ503-505-110030-
Coastal North Bay Including Point Reyes National Seashore CA-
Sonoma Coastal Range CA-
357 PM PST Tue Jan 10 2023

...A strong thunderstorm will impact portions of northwestern Sonoma
County through 430 PM PST...

At 356 PM PST, Doppler radar was tracking a strong thunderstorm 17
miles southeast of Gualala, or 30 miles southeast of Point Arena,
moving northeast at 25 mph.

HAZARD...Winds in excess of 30 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

This storm will remain over mainly rural areas of northwestern Sonoma
County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3858 12297 3851 12326 3854 12329 3857 12334
      3858 12334 3865 12341 3881 12320
TIME...MOT...LOC 2356Z 244DEG 23KT 3855 12336

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...30 MPH

VMT

The office that day

Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 10, 12:17 AM PSTSpecial Marine WarningMTR28 min
Jan 10, 12:55 AM PSTAreal Flood AdvisoryMTRAlameda, Contra Costa, Marin, Monterey, Napa, San Benito and 5 more3 hr
Jan 10, 12:59 AM PSTSpecial Marine WarningMTR31 min
Jan 10, 1:28 AM PSTSpecial Marine WarningMTR32 min
Jan 10, 1:57 AM PSTSpecial Weather StatementMTRSan Mateo18 min
Jan 10, 2:03 AM PSTSpecial Marine WarningMTR12 min
Jan 10, 2:17 AM PSTSpecial Weather StatementMTRAlameda, Contra Costa, Napa28 min
Jan 10, 2:21 AM PSTSpecial Weather StatementMTRSan Benito, Santa Clara, Santa Cruz24 min
Jan 10, 2:50 AM PSTSpecial Weather StatementMTRAlameda10 min
Jan 10, 5:20 AM PSTSpecial Weather StatementMTRSonoma25 min
Jan 10, 5:51 AM PSTSpecial Weather StatementMTRSan Mateo24 min
Jan 10, 5:55 AM PSTSpecial Marine WarningMTR20 min
Jan 10, 6:13 AM PSTSpecial Weather StatementMTRContra Costa32 min
Jan 10, 6:17 AM PSTSpecial Marine WarningMTR28 min
Jan 10, 6:31 AM PSTRiver Flood WarningMTRMonterey36 hr
Jan 10, 6:38 AM PSTSpecial Marine WarningMTR37 min
Jan 10, 6:39 AM PSTSpecial Marine WarningMTR36 min
Jan 10, 6:41 AM PSTSpecial Marine WarningMTR34 min
Jan 10, 6:45 AM PSTSpecial Weather StatementMTRContra Costa15 min
Jan 10, 6:56 AM PSTSpecial Weather StatementMTRSanta Clara34 min
Jan 10, 6:59 AM PSTSpecial Marine WarningMTR16 min
Jan 10, 7:02 AM PSTSpecial Weather StatementMTRMarin43 min
Jan 10, 7:07 AM PSTSpecial Weather StatementMTRAlameda, Contra Costa38 min
Jan 10, 7:08 AM PSTSpecial Weather StatementMTRSan Mateo, Santa Cruz22 min
Jan 10, 7:28 AM PSTSpecial Marine WarningMTR47 min
Jan 10, 7:30 AM PSTSpecial Marine WarningMTR45 min
Jan 10, 7:44 AM PSTSpecial Weather StatementMTRAlameda31 min
Jan 10, 7:50 AM PSTSpecial Marine WarningMTR25 min
Jan 10, 7:53 AM PSTSpecial Weather StatementMTRMarin37 min
Jan 10, 7:55 AM PSTSpecial Weather StatementMTRAlameda, San Mateo35 min
Jan 10, 8:09 AM PSTSpecial Weather StatementMTRSanta Clara36 min
Jan 10, 8:18 AM PSTSpecial Weather StatementMTRSanta Cruz27 min
Jan 10, 8:23 AM PSTSpecial Weather StatementMTRMarin37 min
Jan 10, 8:28 AM PSTSpecial Marine WarningMTR32 min
Jan 10, 8:30 AM PSTSpecial Weather StatementMTRAlameda30 min
Jan 10, 8:34 AM PSTSpecial Weather StatementMTRAlameda26 min
Jan 10, 8:50 AM PSTSpecial Weather StatementMTRContra Costa25 min
Jan 10, 8:55 AM PSTSmall Craft AdvisoryMTR3 days
Jan 10, 9:04 AM PSTSpecial Weather StatementMTRSanta Clara26 min
Jan 10, 9:14 AM PSTSpecial Weather StatementMTRContra Costa31 min
Jan 10, 9:23 AM PSTSpecial Weather StatementMTRMonterey37 min
Jan 10, 9:38 AM PSTSpecial Weather StatementMTRAlameda37 min
Jan 10, 9:43 AM PSTSpecial Weather StatementMTRSan Mateo47 min
Jan 10, 9:49 AM PSTSpecial Weather StatementMTRContra Costa26 min
Jan 10, 10:11 AM PSTSpecial Weather StatementMTRContra Costa34 min
Jan 10, 10:21 AM PSTSpecial Weather StatementMTRContra Costa24 min
Jan 10, 10:21 AM PSTSpecial Weather StatementMTRAlameda39 min
Jan 10, 10:43 AM PSTSpecial Marine WarningMTR62 min
Jan 10, 10:54 AM PSTSpecial Weather StatementMTRMonterey, San Benito36 min
Jan 10, 11:20 AM PSTSpecial Weather StatementMTRSan Mateo40 min
Jan 10, 11:29 AM PSTSpecial Marine WarningMTR61 min
Jan 10, 11:36 AM PSTSpecial Weather StatementMTRContra Costa39 min
Jan 10, 11:37 AM PSTSpecial Weather StatementMTRSonoma38 min
Jan 10, 11:44 AM PSTSpecial Weather StatementMTRMarin46 min
Jan 10, 11:56 AM PSTSpecial Weather StatementMTRSan Mateo34 min
Jan 10, 11:59 AM PSTSpecial Marine WarningMTR31 min
Jan 10, 12:11 PM PSTAreal Flood WarningMTRCity and County of San Francisco, San Mateo3 hr
Jan 10, 12:19 PM PSTFlash Flood Warning Considerable damage threatMTRCity and County of San Francisco, San Mateo85 min
Jan 10, 12:19 PM PSTSpecial Weather StatementMTRContra Costa41 min
Jan 10, 12:25 PM PSTSpecial Marine WarningMTR35 min
Jan 10, 12:26 PM PSTAreal Flood WarningMTRAlameda, Contra Costa3 hr
Jan 10, 12:37 PM PSTSpecial Weather StatementMTRContra Costa38 min
Jan 10, 12:49 PM PSTAreal Flood WarningMTRMarin3 hr
Jan 10, 12:58 PM PSTSpecial Weather StatementMTRContra Costa, Marin62 min
Jan 10, 1:08 PM PSTSpecial Marine WarningMTR37 min
Jan 10, 1:09 PM PSTSpecial Weather StatementMTRContra Costa36 min
Jan 10, 1:11 PM PSTFlash Flood Warning Considerable damage threatMTRMonterey6 hr
Jan 10, 1:41 PM PSTSpecial Marine WarningMTR49 min
Jan 10, 2:00 PM PSTSpecial Weather StatementMTRMarin45 min
Jan 10, 2:02 PM PSTSpecial Marine WarningMTR43 min
Jan 10, 2:36 PM PSTSpecial Weather StatementMTRContra Costa24 min
Jan 10, 2:38 PM PSTSpecial Marine WarningMTR37 min
Jan 10, 2:57 PM PSTSpecial Weather StatementMTRContra Costa33 min
Jan 10, 3:03 PM PSTSpecial Weather StatementMTRContra Costa57 min
Jan 10, 3:16 PM PSTSpecial Weather StatementMTRContra Costa29 min
Jan 10, 3:57 PM PSTSpecial Weather StatementMTRSonoma33 min

Nearby

Small Craft Advisories in California, 2023Every small craft advisory in 2023

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.