[EDIS] flood advisory - nws san francisco ca

[edis at svwux.org]

FLOOD ADVISORY - NWS SAN FRANCISCO CA

THE NATIONAL WEATHER SERVICE IN THE SAN FRANCISCO BAY AREA HAS
EXTENDED THE
* URBAN AND SMALL STREAM FLOOD ADVISORY FOR...
MARIN COUNTY IN NORTHERN CALIFORNIA...
CONTRA COSTA COUNTY IN NORTHERN CALIFORNIA...
SAN FRANCISCO COUNTY IN NORTHERN CALIFORNIA...
SONOMA COUNTY IN NORTHERN CALIFORNIA...
NAPA COUNTY IN NORTHERN CALIFORNIA...
ALAMEDA COUNTY IN NORTHERN CALIFORNIA...
SANTA CLARA COUNTY IN NORTHERN CALIFORNIA...
SAN MATEO COUNTY IN NORTHERN CALIFORNIA...
SANTA CRUZ COUNTY IN NORTHERN CALIFORNIA...
SAN BENITO COUNTY IN CENTRAL CALIFORNIA...
MONTEREY COUNTY IN CENTRAL CALIFORNIA...
* UNTIL 1100 AM PST.
* AT 855 AM PST AUTOMATED RAINGAGE AND DOPPLER RADAR DATA INDICATED
MODERATE TO HEAVY RAIN WITH EMBEDDED THUNDERSTORMS MOVING ONTO THE
COAST AT THIS TIME. THE COLD FRONTAL PASSAGE AND HEAVIEST RAIN RATES
ARE EXPECTED TO MOVE ONSHORE OVER THE NEXT TWO HOURS. OBSERVED
HOURLY RAIN RATES HAVE BEEN AROUND 0.25 IN THE VALLEYS WITH UP TO
0.50 IN THE HILLS. THE RAIN WILL IMPACT THE LATE MORNING COMMUTE
WITH MORE PONDING OF WATER ON ROADWAYS AND LOCALIZED URBAN AND SMALL
STREAM FLOODING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
RUNOFF FROM HEAVY RAINFALL IS EXPECTED TO CAUSE PONDING OR FLOODING
ON SOME ROADWAYS... POOR DRAINAGE AREAS AND LOW LYING SPOTS. ALSO...
HEAVY RAINFALL IS EXPECTED TO CAUSE ELEVATED LEVELS ON SMALL CREEKS
AND STREAMS AND MAY CAUSE FLOODING OF SOME.
&&

A FLOOD ADVISORY MEANS THAT NUISANCE FLOODING IS OCCURRING OR IS
EXPECTED.

Area: /00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

Category: Met
Event: FLOOD ADVISORY
Sender: NATIONAL WEATHER SERVICE SAN FRANCISCO CA
Expires: 2010-01-20T11:00:00-08:00
Urgency: Future
Severity: Severe
Certainty: Possible
See http://edis.oes.ca.gov/255906.xml
Sent: 2010-01-20T08:56:16-08:00
Status: Actual
Message Type: Alert
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