Alert archive / California / Areal Flood Advisories in 2012

Areal Flood Advisory 13, NWS San Francisco Bay Area, CA

December 23, 20124 counties in California

NWS San Francisco Bay Area, CA issued this areal flood advisory at Dec 23, 2012, 4:04 PM PST for 4 counties in California. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Dec 23, 2012, 4:04 PM PST (00:04 UTC)
Expired
Dec 23, 2012, 7:00 PM PST
In force
3 hr
Issued by
NWS San Francisco Bay Area, CA
Area
Storm-based polygon

Counties Alameda County, CA, San Mateo County, CA, Santa Clara County, CA, Santa Cruz County, CA

The radar

The San Francisco radar (KMUX), 22 km from the middle of the area, began a volume at 00:04 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.

What forecasters said that day

The local office's own words before this areal flood 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 areal flood advisory went out at Dec 23, 3:56 PM PST, 8 minutes earlier.

Area forecast discussion, Dec 23, 3:56 PM PST, 8 minutes before
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Hazardous weather outlook, Dec 23, 5:40 AM PST, 10 hours 24 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
540 AM PST SUN DEC 23 2012

CAZ006-505>507-509-241400-
SAN FRANCISCO-
COASTAL NORTH BAY...INCLUDING POINT REYES NATIONAL SEASHORE-
NORTH BAY INTERIOR VALLEYS-NORTH BAY MOUNTAINS-
SAN FRANCISCO PENINSULA COAST-
540 AM PST SUN DEC 23 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SAN FRANCISCO BAY AREA AND
MONTEREY BAY AREA.

.DAY ONE...SUNDAY AND SUNDAY NIGHT

SOUTHERLY WINDS WILL INCREASE ACROSS THE AREA TODAY WITH WIND
GUSTS AS HIGH AS 50 MPH ARE POSSIBLE. A WIND ADVISORY IS IN EFFECT
THROUGH 1 PM PST SUNDAY. LOCALLY HEAVY RAIN COULD RESULT IN LOCAL
FLOODING OF SMALL STREAMS AND CREEKS AS WELL AS ROADS.

*  WIND ADVISORY.....SEE SFONPWMTR WWUS76 KMTR FOR DETAILS  *

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

DRY WEATHER IS FORECAST MONDAY BEFORE ANOTHER CHANCE OF RAIN
ARRIVES BY CHRISTMAS AFTERNOON.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS PER STANDARD OPERATING PROCEDURES.

CAZ508-510>512-241400-
SAN FRANCISCO BAY SHORELINE-EAST BAY INTERIOR VALLEYS-
EAST BAY HILLS AND DIABLO RANGE-SANTA CRUZ MOUNTAINS-
540 AM PST SUN DEC 23 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SAN FRANCISCO BAY AREA AND
MONTEREY BAY AREA.

.DAY ONE...SUNDAY AND SUNDAY NIGHT

SOUTHERLY WINDS WILL INCREASE ACROSS THE AREA TODAY WITH WIND
GUSTS AS HIGH AS 45 MPH POSSIBLE. A WIND ADVISORY IS IN EFFECT
THROUGH 1 PM PST SUNDAY. IN ADDITION THERE WILL BE PERIODS OF
MODERATE RAIN.

*  WIND ADVISORY.....SEE SFONPWMTR WWUS76 KMTR FOR DETAILS  *

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

DRY WEATHER IS FORECAST MONDAY BEFORE ANOTHER CHANCE OF RAIN
ARRIVES BY CHRISTMAS EVENING.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS PER STANDARD OPERATING PROCEDURES.

CAZ528>530-241400-
NORTHERN SALINAS VALLEY...HOLLISTER VALLEY...AND CARMEL VALLEY-
NORTHERN MONTEREY BAY-SOUTHERN MONTEREY BAY AND BIG SUR COAST-
540 AM PST SUN DEC 23 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SAN FRANCISCO BAY AREA AND
MONTEREY BAY AREA.

.DAY ONE...SUNDAY AND SUNDAY NIGHT

STRONG AND GUSTY SOUTHERLY WINDS ARE EXPECTED LATER THIS MORNING THROUGH
EARLY AFTERNOON. WIND GUSTS UP TO 35 MPH ARE LIKELY. IN ADDITION A
PERIOD OF MODERATE RAIN IS LIKELY.

*  WIND ADVISORY.....SEE SFONPWMTR WWUS76 KMTR FOR DETAILS *

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

 DRY WEATHER IS FORECAST MONDAYBEFORE ANOTHER CHANCE OF RAIN
ARRIVES BY CHRISTMAS EVENING.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS PER STANDARD OPERATING PROCEDURES.

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 23, 4:43 PM PSTFlash Flood WarningMTRSanta Cruz2 hr
Dec 23, 5:05 PM PSTFlash Flood WarningMTRSan Mateo, Santa Cruz115 min
Dec 23, 7:01 PM PSTFlash Flood WarningMTRSanta Cruz108 min
Dec 23, 7:04 PM PSTFlash Flood WarningMTRSan Mateo, Santa Cruz86 min
Dec 23, 7:30 PM PSTAreal Flood WarningMTRSan Mateo, Santa Clara105 min
Dec 23, 8:11 PM PSTAreal Flood AdvisoryMTRMonterey, San Benito, Santa Clara, Santa Cruz94 min
Dec 24, 2:41 PM PSTSmall Craft AdvisoryMTR3 days

Nearby

Areal Flood Advisories in California, 2012Every areal flood advisory in 2012

Sources

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