Alert archive / California / Flash Flood Warnings in 2014

Flash Flood Warning 13, NWS Sacramento, CA

December 11, 2014El Dorado County, Placer County, California

NWS Sacramento, CA issued this flash flood warning at Dec 11, 2014, 9:22 PM PST for El Dorado County, Placer County, California. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Dec 11, 2014, 9:22 PM PST (05:22 UTC)
Expired: Dec 12, 2014, 3:15 AM PST
In force: 6 hr
Issued by: NWS Sacramento, CA
Area: Storm-based polygon
Flood severity: None

Counties El Dorado County, CA, Placer County, CA

The radar

The Beale AFB radar (KBBX), 105 km from the middle of the area, began a volume at 05:26 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 nearest sounding before it

Oakland, CA (KOAK), launched 00:00Z, 5.4 hours before the alert went out and 202 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 4 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 725 m above ground
0-6 km bulk shear: 78 kt
0-1 km storm-relative helicity: -118 m²/s²
0-3 km storm-relative helicity: -19 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

416 
WGUS56 KSTO 120522
FFWSTO
CAC017-061-121115-
/O.NEW.KSTO.FF.W.0013.141212T0522Z-141212T1115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SACRAMENTO CA
922 PM PST THU DEC 11 2014

THE NATIONAL WEATHER SERVICE IN SACRAMENTO HAS EXTENDED A

* FLASH FLOOD WARNING FOR...
  THE AMERICAN FIRE BURN AREA IN...
  EL DORADO COUNTY...
  THE KING FIRE BURN AREA IN...
  PLACER COUNTY...

* UNTIL 315 AM PST FRIDAY

* AT 914 PM PST...MODERATE TO HEAVY RAIN IN THE CENTRAL VALLEY       
  CONTINUES TO MOVE INTO THE SIERRA. HIGHER ELEVATIONS OF THE
  BURN SCAR AREAS WILL HAVE SNOW.

* FLASH FLOODS AND DEBRIS FLOWS ARE LIKELY IN AND BELOW THE AMERICAN 
  FIRE BURN AREA FOR SEVERAL HOURS DUE TO HEAVY RAIN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

AMERICAN FIRE BURN AREA: THE SEVERELY BURNED AREAS ARE OF PARTICULAR 
CONCERN...THIS INCLUDES THE UPPER PORTION OF THE NORTH FORK OF THE 
MIDDLE FORK OF THE AMERICAN RIVER BASIN INCLUDING THE WESTERN STATES 
TRAIL. THESE AREAS NO LONGER ABSORB ANY RAINFALL, LEADING TO 
ENHANCED RUNOFF. THOSE TRAVELING ALONG FORESTHILL ROAD BETWEEN 
WESTVILLE AND ROBINSON FLAT SHOULD BE ALERT FOR PROBABLE ROAD 
PROBLEMS DUE TO FLOODING, ROCK AND DEBRIS FLOWS.

KING FIRE BURN AREA: THE SEVERELY BURNED AREAS ARE OF PARTICULAR 
CONCERN...THIS INCLUDES THE RUBICON RIVER, SILVER CREEK AND SOUTH 
FORK AMERICAN RIVER BASINS. THESE AREAS NO LONGER ABSORB ANY 
RAINFALL LEADING TO ENHANCED RUNOFF. THOSE TRAVELING ALONG ELEVEN 
PINES ROAD ESPECIALLY AROUND THE ELLICOT CROSSING REACH, JAYBIRD 
ACCESS ROAD, FOREBAY ROAD AND OTHER LOCAL ROADS WITHIN THE KING FIRE 
BURN AREA SHOULD BE ALERT FOR PROBABLE ROAD PROBLEMS DUE TO 
FLOODING, ROCK AND DEBRIS FLOWS.

THIS IS A DANGEROUS SITUATION. RESIDENTS AND PERSONS TRAVELING WITHIN
THE AMERICAN AND KING FIRE BURN AREAS NEED TO BE ALERT FOR THE 
POTENTIAL OF MUD AND DEBRIS FLOWS. THESE FLOWS COULD IMPACT AREA 
ROADWAYS, HILL SIDES, AND LOCAL STREAMS AND CREEKS. IF YOU OBSERVE 
MOVEMENT OF SOILS...DEBRIS, OR LARGE AMOUNTS OF WATER YOU SHOULD 
MOVE TO HIGHER GROUND IMMEDIATELY.

THIS IS A DANGEROUS SITUATION. RESIDENTS AND PERSONS TRAVELING WITHIN
THE AMERICAN AND KING FIRE BURN AREAS NEED TO BE ALERT FOR THE POTENTIAL 
OF MUD AND DEBRIS FLOWS. THESE FLOWS COULD IMPACT AREA ROADWAYS, 
HILL SIDES, AND LOCAL STREAMS AND CREEKS. 

A FLASH FLOOD WARNING FOR A BURN AREA MEANS THAT FLASH FLOODING, 
DEBRIS FLOWS, AND/OR ROCK SLIDES ARE LIKELY OR ALREADY OCCURRING. IF 
YOU OBSERVE MOVEMENT OF SOILS...DEBRIS, OR LARGE AMOUNTS OF WATER 
YOU SHOULD MOVE TO HIGHER GROUND IMMEDIATELY.

&&

LAT...LON 3923 12061 3913 12032 3875 12047 3876 12071
      3908 12072

$$

JBB

1 follow-up statement

951 
WGUS76 KSTO 121116
FFSSTO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SACRAMENTO CA
316 AM PST FRI DEC 12 2014

CAC017-061-121123-
/O.EXP.KSTO.FF.W.0013.000000T0000Z-141212T1115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
EL DORADO CA-PLACER CA-
316 AM PST FRI DEC 12 2014

...THE FLASH FLOOD WARNING WILL EXPIRE AT 315 AM PST FOR... 

 THE AMERICAN FIRE BURN AREA IN...
 EL DORADO COUNTY...

 THE KING FIRE BURN AREA IN...
 PLACER COUNTY...





LAT...LON 3923 12061 3913 12032 3875 12047 3876 12071
      3908 12072

$$
MS

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 11, 9:46 PM PST	Areal Flood Advisory	STO	Amador, Calaveras, El Dorado, Nevada, Placer, Sacramento and 6 more	12 hr
Dec 12, 10:07 AM PST	Areal Flood Advisory	STO	Placer, Sacramento	6 hr

Nearby

Flash Flood Warnings in California, 2014 Every flash flood warning in 2014

Sources

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