Alert archive / California / River Flood Warnings in 2017

River Flood Warning 9, NWS Eureka, CA

January 21, 2017Mendocino County, California

NWS Eureka, CA issued this river flood warning at Jan 21, 2017, 3:45 PM PST for Mendocino County, California. It took effect at Jan 22, 2017, 9:07 AM PST. It was in force for 9 hr.

The area

The outline as issued.

The facts

Issued
Jan 21, 2017, 3:45 PM PST (23:45 UTC)
In effect from
Jan 22, 2017, 9:07 AM PST
Expired
Jan 22, 2017, 5:43 PM PST
In force
9 hr
Issued by
NWS Eureka, CA
Area
Storm-based polygon
Flood severity
Minor

County Mendocino County, CA

The radar

The Eureka (Bunker Hill) radar (KBHX), 155 km from the middle of the area, began a volume at 23:46 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 river

Written for the forecast point Navarro River near Navarro (NVRC1). The gauge peaked at 24.24 ft at Jan 22, 2017, 12:00 PM PST.

minormoderate1520253001/2101/2201/2301/24
Minor stage
23 ft
Moderate stage
30 ft
Major stage
34 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 11468000, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

The text

As transmitted.

739 
WGUS46 KEKA 212345
FLWEKA
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE EUREKA, CA
345 PM PST SAT JAN 21 2017

...The National Weather Service in Eureka has issued
a Flood Warning in cooperation with the California Department
of Water Resources for the following rivers in California...

  Navarro River At Navarro affecting Mendocino County

A frontal system moving across the region Saturday night and Sunday morning
will bring 1 to 2 inches of rainfall accumulation. This will result in a
rapid and steep rise for the Navarro River, causing the river to briefly
exceed flood stage during late Sunday morning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...

Do not drive your car across flooded roadways. It only takes about 
two feet of water to float most vehicles. For area road conditions...
call CALTRANS at 1-800-427-7623.

Stay tuned to developments by listening to NOAA Weather Radio or your
local TV or radio stations.

The next statement will be issued at 9 AM PST Sunday or as 
warranted by changing conditions.

&&

CAC045-220745-
/O.NEW.KEKA.FL.W.0009.170122T1720Z-170123T0030Z/
/NVRC1.1.ER.170122T1720Z.170122T1800Z.170122T1830Z.NO/
345 PM PST SAT JAN 21 2017

 The National Weather Service in Eureka has issued a 

* Flood Warning for the Navarro River At Navarro.
* From Sunday morning to Sunday afternoon...or until the warning is 
  cancelled.
* At  3:15 PM Saturday the stage was 17.4 feet. 
* Minor flooding is forecast late Sunday morning. 
* Flood stage is 23.0 feet.
* This river is expected to rise above flood stage of  23.0 ft late 
  tomorrow morning, cresting near 23.2 ft late tomorrow morning, then 
  forecast to fall below flood stage of 23.0 ft near 
  tomorrow noon, then forecast to recede to near 13.0 ft Monday 
  afternoon.
* IMPACTS...At 23.0 feet...Flooding of Highway 128 approximately 5 
  miles from Highway 1 is certain and the road will be closed. 
  Motorists should use alternate routes.

 &&

LAT...LON 3921 12354 3914 12366 3917 12375 3925 12376


$$
3 follow-up statements
931 
WGUS86 KEKA 220630
FLSEKA
FLOOD STATEMENT
NATIONAL WEATHER SERVICE EUREKA, CA
1030 PM PST SAT JAN 21 2017

...The Flood Warning continues for the following rivers in 
California...

  Navarro River At Navarro affecting Mendocino County 

A frontal system moving across the region tonight and Sunday morning
will bring 1 to 2 inches of rainfall accumulation. This will result in a
rapid and steep rise for the Navarro River, causing the river to briefly
exceed flood stage late Sunday morning.

SAFETY MESSAGE...

Do not drive your car across flooded roadways. It only takes about 
two feet of water to float most vehicles. For area road conditions...
call CALTRANS at 1-800-427-7623.

Stay tuned to developments by listening to NOAA Weather Radio or your
local TV or radio stations.

The next statement will be issued by 1000 AM Sunday or as warranted by 
changing conditions.

&&

CAC045-221830-
/O.CON.KEKA.FL.W.0009.170122T1720Z-170123T0030Z/
/NVRC1.1.ER.170122T1720Z.170122T1800Z.170122T1830Z.NO/
1030 PM PST SAT JAN 21 2017

The Flood Warning continues for the Navarro River at Navarro...

* From Sunday morning to Sunday afternoon or until the warning is 
  cancelled.
* At 9:15 PM Saturday, the stage was 16.3 feet. 
* Minor flooding is forecast.
* Flood stage is 23.0 feet. 
* FORECAST...This river is expected to crest just above flood stage at  
  23.2 feet late Sunday morning, then recede to near 12.0 feet by noon 
  on Tuesday.
* IMPACTS...At 23.0 feet, flooding of Highway 128 approximately 5 
  miles from Highway 1 is certain and the road will be closed. 
  Motorists should use alternate routes.

&&

LAT...LON 3921 12354 3914 12366 3917 12375 3925 12376

$$
645 
WGUS86 KEKA 221715
FLSEKA
FLOOD STATEMENT
NATIONAL WEATHER SERVICE EUREKA, CA
915 AM PST SUN JAN 22 2017

...The Flood Warning continues for the following rivers in 
California...
 
  Navarro River At Navarro affecting Mendocino County 

A frontal system that moved across the region Saturday night produced
1 to 2 inches of rainfall accumulation. As a result, steep rises on 
the Navarro River have occurred, causing it to reach minor flood
stage.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...

Do not drive your car across flooded roadways. It only takes about 
two feet of water to float most vehicles. For area road conditions...
call CALTRANS at 1-800-427-7623.

Stay tuned to developments by listening to NOAA Weather Radio or your
local TV or radio stations.

The next statement will be issued at 7 PM PST Sunday or as 
warranted by changing conditions.

&&

CAC045-230310-
/O.EXT.KEKA.FL.W.0009.170122T1707Z-170123T0310Z/
/NVRC1.1.ER.170122T1700Z.170122T1900Z.170122T2110Z.NO/
915 AM PST SUN JAN 22 2017

...Flood Warning extended until this evening...The Flood Warning 
continues for the Navarro River At Navarro.
* UNTIL THIS EVENING...or until the warning is cancelled.
* At  9:00 AM Sunday the stage was 23.0 feet. 
* Minor Flooding is occurring.
* Flood Stage is 23.0 feet.
* FORECAST...This river is forecast to crest at 23.8 feet late
  Sunday morning, and then fall below minor flood stage of 23.0 feet
  by early Sunday afternoon.
* IMPACTS...At 23.0 feet...Flooding of Highway 128 approximately 5 
  miles from Highway 1 is certain and the road will be closed. 
  Motorists should use alternate routes.

 &&

LAT...LON 3921 12354 3914 12366 3917 12375 3925 12376


$$
775 
WGUS86 KEKA 230143
FLSEKA
FLOOD STATEMENT
NATIONAL WEATHER SERVICE EUREKA, CA
543 PM PST SUN JAN 22 2017

...The Flood Warning is cancelled for the following river in 
California...
 
  Navarro River At Navarro affecting Mendocino County

Showers will continue through Monday. However, the river has 
fallen below flood stage and is forecast to continue to recede.

SAFETY MESSAGE...

Do not drive your car across flooded roadways. It only takes about 
two feet of water to float most vehicles. For area road conditions...
call CALTRANS at 1-800-427-7623.

Stay tuned to developments by listening to NOAA Weather Radio or your
local TV or radio stations.

This will be the last statement issued for this point unless 
warranted by changing conditions.

&&

CAC045-230343-
/O.CAN.KEKA.FL.W.0009.000000T0000Z-170123T0310Z/
/NVRC1.1.ER.170122T1700Z.170122T1945Z.170122T2318Z.NO/
543 PM PST SUN JAN 22 2017

The Flood Warning is cancelled for the Navarro River At Navarro...

* At 5:15 PM Sunday the stage was 21.8 feet. 
* The river fell below flood stage at 3:18 PM Sunday.
* Flood stage is 23.0 feet. 

* FORECAST...This river is forecast to recede to near 10.5 feet by
  Wednesday evening.
* IMPACTS...Residual flooding of Highway 128 approximately 5 
  miles from Highway 1 is possible until waters recede further. 

&&

LAT...LON 3921 12354 3914 12366 3917 12375 3925 12376

$$

The office that day

Everything else NWS Eureka, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 20, 9:07 PM PSTStorm WarningEKA29 hr
Jan 21, 3:34 AM PSTHigh Wind WarningEKADel Norte, Humboldt, Mendocino23 hr
Jan 21, 3:34 AM PSTWind AdvisoryEKAHumboldt, Mendocino22 hr
Jan 21, 2:32 PM PSTWinter Storm WarningEKATrinity21 hr
Jan 21, 2:32 PM PSTWinter Weather AdvisoryEKADel Norte, Humboldt, Mendocino, Trinity55 hr
Jan 21, 3:56 PM PSTHigh Surf AdvisoryEKADel Norte, Humboldt, Mendocino6 hr

Nearby

River Flood Warnings in California, 2017Every river flood warning in 2017

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