River Flood Warning 5, NWS San Francisco Bay Area, CA

Issued

Dec 23, 2012, 2:17 PM PST (22:17 UTC)

In effect from

Dec 23, 2012, 6:06 PM PST

Expired

Dec 24, 2012, 1:44 AM PST

In force

8 hr

Issued by

NWS San Francisco Bay Area, CA

Flood severity

Moderate

County Napa County, CA

The Sacramento radar (KDAX), 57 km from the middle of the area, began a volume at 22:18 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.

Written for the forecast point Napa River near Napa (APCC1). The gauge peaked at 23.64 ft at Dec 24, 2012, 12:00 AM PST.

Action stage

22 ft

Minor stage

25 ft

Moderate stage

26 ft

Major stage

28 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 11458000, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

500 
WGUS46 KMTR 232217
FLWMTR
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA, CA
217 PM PST SUN DEC 23 2012

...THE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA HAS ISSUED A 
FLOOD WARNING FOR THE FOLLOWING RIVERS IN CALIFORNIA...

******** CHOOSE FORECAST POINTS TO INCLUDE FROM THIS LIST!! *******

  NAPA RIVER NEAR ST. HELENA AFFECTING NAPA COUNTY
  NAPA RIVER NEAR NAPA AFFECTING NAPA COUNTY


HEAVY RAINFALL THIS MORNING...WHICH CONTINUES INTO THE AFTERNOON WITH FRONTAL PASSAGE...HAS CAUSED THE NAPA RIVER NEAR ST. HELENA AND NAPA RIVER NEAR NAPA TO APPROACH FLOOD STAGE.  BOTH LOCATIONS ARE EXPECTED TO REACH FLOOD STAGES LATER TODAY OR THIS EVENING.

CAC055-241017-
/O.NEW.KMTR.FL.W.0004.121224T0036Z-121224T1852Z/
/SHEC1.1.ER.121224T0036Z.121224T0400Z.121224T0652Z.NR/
217 PM PST SUN DEC 23 2012

THE NATIONAL WEATHER SERVICE IN MTR HAS ISSUED A 

* FLOOD WARNING FOR 
  THE NAPA RIVER NEAR ST HELENA.
* UNTIL MONDAY MORNING...OR UNTIL THE WARNING IS CANCELLED.
* AT  1:30 PM SUNDAY THE STAGE WAS 15.4 FEET.
* FLOOD STAGE IS 16.0 FEET.
* MINOR FLOODING IS FORECAST.
* AT 18.0 FEET...MODERATE FLOODING ACROSS LOWER AREAS OF TOWNS ALONG 
  THE REACH.  WIDESPREAD CROP LOSSES AND EROSION OF LAND.  MANY 
  PRIMARY AND MOST SECONDARY ROADS WILL FLOOD, MAKING TRAVEL 
  DIFFICULT TO NEARLY IMPOSSIBLE IN SOME AREAS.

$$

CAC055-241017-
/O.NEW.KMTR.FL.W.0005.121224T0206Z-121224T2112Z/
/APCC1.2.ER.121224T0206Z.121224T0600Z.121224T0912Z.NO/
217 PM PST SUN DEC 23 2012

THE NATIONAL WEATHER SERVICE IN MTR HAS ISSUED A 

* FLOOD WARNING FOR 
  THE NAPA RIVER NEAR NAPA.
* FROM THIS EVENING TO MONDAY AFTERNOON...OR UNTIL THE WARNING IS 
  CANCELLED.
* AT  1:00 PM SUNDAY THE STAGE WAS 19.0 FEET.
* FLOOD STAGE IS 25.0 FEET.
* MODERATE FLOODING IS FORECAST.
* AT 26.0 FEET...MODERATE FLOODING WILL CAUSE CROP LOSSES AND EROSION
  TO AGRICULTURAL AREAS ALONG THE NAPA RIVER.  SOME PRIMARY AND MANY 
  SECONDARY ROADS WILL HAVE MODERATE FLOODING MAKING TRAVEL VERY 
  DIFFICULT.

$$

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PEOPLE WITH INTERESTS ALONG THE RIVER SHOULD PREPARE FOR FLOOD 
CONDITIONS AND BE READY TO MOVE TO HIGHER GROUND.  FOLLOW EMERGENCY 
OFFICIAL INSTRUCTIONS.

RIVER FLOODING CAN CAUSE ADDITIONAL HAZARDS LIKE BANK COLLAPSE AND 
SHIFTING CHANNELS.  AVOID AREAS ADJACENT TO A FLOODING RIVER SINCE 
THE EARTH UNDERNEATH MAY BE ERODED. DO NOT LET CHILDREN PLAY NEAR 
FLOODWATERS...ESPECIALLY AROUND CULVERTS AND  STORM DRAINS.

DO NOT DRIVE THROUGH FLOOD PRONE AREAS...LOW WATER CROSSINGS...OR GO 
AROUND BARRICADES.  THE ROAD AHEAD MAY BE UNDERMINED OR WASHED OUT 
AND THE WATER DEPTH TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. 

FOR THE LATEST DEVELOPMENTS LISTEN TO NOAA WEATHER RADIO OR TUNE TO 
YOUR LOCAL TV OR RADIO STATION. INFORMATION CAN ALSO BE OBTAINED FROM
THE NWS WEBSITE AT /LOWER CASE/ WWW.WRH.NOAA.GOV/MTR

THE NEXT STATEMENT WILL BE ISSUED AS CONDITIONS WARRANT. FOR THE LATEST STAGES AND FORECASTS GO TO HTTP://WWW.NCRFC.NOAA.GOV.

&&

STRUDLEY

898 
WGUS86 KMTR 240624
FLSMTR
FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA, CA
1024 PM PST SUN DEC 23 2012

...THE FLOOD WARNING IS CANCELLED FOR THE FOLLOWING RIVERS IN
CALIFORNIA...

  NAPA RIVER NEAR ST. HELENA AFFECTING NAPA COUNTY

...THE FLOOD WARNING CONTINUES FOR THE FOLLOWING RIVERS IN
CALIFORNIA...

  NAPA RIVER NEAR NAPA AFFECTING NAPA COUNTY

RAINFALL HAD ENDED ACROSS THE NORTH BAY BY SUNDAY EVENING AND
LITTLE ADDITIONAL RAINFALL WAS EXPECTED SUNDAY NIGHT. THE NAPA
RIVER NEAR SAINT HELENA CRESTED ABOUT ONE FOOT ABOVE FLOOD STAGE
AT ABOUT 7 PM SUNDAY EVENING AND HAS SINCE DROPPED BELOW FLOOD
STAGE. THE NAPA RIVER NEAR NAPA WAS STILL RISING AND IS EXPECTED
TO CREST NEAR FLOOD STAGE ON SUNDAY NIGHT.

CAC055-240654-
/O.CAN.KMTR.FL.W.0004.000000T0000Z-121224T1852Z/
/SHEC1.1.ER.121223T2250Z.121224T0200Z.121224T0325Z.NR/
1024 PM PST SUN DEC 23 2012

THE NAPA RIVER NEAR SAINT HELENA CRESTED NEAR 17 FEET AT
ABOUT 7 PM PST SUNDAY EVENING. THE UPPER NAPA RIVER HAS
SINCE FALLEN BELOW FLOOD STAGE AT ST HELENA AND IS
CONTINUING TO RECEDE. THEREFORE...THE FLOOD WARNING FOR
THE NAPA RIVER NEAR ST HELENA HAS BEEN CANCELLED.

$$

CAC055-242112-
/O.CON.KMTR.FL.W.0005.000000T0000Z-121224T2112Z/
/APCC1.2.ER.121224T0600Z.121224T0700Z.121224T0912Z.NO/
1024 PM PST SUN DEC 23 2012

THE FLOOD WARNING CONTINUES FOR
   THE NAPA RIVER NEAR NAPA
* UNTIL MONDAY MORNING.
* AT 9 PM PST SUNDAY THE STAGE NEAR NAPA WAS 23.4 FT
* FORECAST TO RISE ABOVE FLOOD STAGE OF 25.0 FT LATE SUNDAY EVENING
* THEN FORECAST TO CREST NEAR 26.5 FT NEAR MIDNIGHT SUNDAY NIGHT
* THEN FORECAST TO FALL BELOW FLOOD STAGE EARLY MONDAY MORNING
* THEN FORECAST TO RECEDE TO NEAR 15.0 FT BY FRIDAY MORNING
* FLOOD STAGE NEAR NAPA IS 25.0 FT
* AT 26.0 FEET...MODERATE FLOODING WILL CAUSE CROP LOSSES AND EROSION
  TO AGRICULTURAL AREAS ALONG THE NAPA RIVER.  SOME PRIMARY AND MANY
  SECONDARY ROADS WILL HAVE MODERATE FLOODING MAKING TRAVEL VERY
  DIFFICULT.

$$

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ALL THOSE AFFECTED BY RIVER CONDITIONS SHOULD REMAIN ALERT FOR RAPID 
CHANGES AND FOR POSSIBLE FORECAST REVISIONS.
$$

THE NEXT STATEMENT WILL BE ISSUED BY 9 AM PST MONDAY MORNING OR
SOONER AS CONDITIONS WARRANT.

&&

741 
WGUS86 KMTR 240944
FLSMTR
FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA, CA
144 AM PST MON DEC 24 2012

...THE FLOOD WARNING IS CANCELLED FOR THE FOLLOWING RIVERS IN
CALIFORNIA...

  NAPA RIVER NEAR NAPA AFFECTING NAPA COUNTY

CAC055-241014-
/O.CAN.KMTR.FL.W.0005.000000T0000Z-121224T2112Z/
/APCC1.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.NO/
144 AM PST MON DEC 24 2012

AT 1 AM PST THE RIVER STAGE AT NAPA RIVER NEAR NAPA WAS 23.64 FEET
WHICH IS MORE THAN ONE FOOT BELOW FLOOD STAGE. THE WATER LEVEL HAS
LEVELED OFF AND IS EXPECTED TO START FALLING SHORTLY. THEREFORE
THE FLOOD WARNING IS CANCELLED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

CONTINUE TO BE CAUTIOUS IF VENTURING NEAR THE NAPA RIVER AS WATER
LEVELS REMAIN HIGH.

THIS WILL BE THE FINAL SCHEDULED STATEMENT UNLESS CONDITIONS CHANGE.

&&

River Flood Warnings in California, 2012Every river flood warning in 2012

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; the gauge from the NWS water service and the USGS.