Alert archive / California / Flash Flood Warnings in 2012

Flash Flood Warning 2, NWS Hanford, CA

August 30, 2012Kern County, California

NWS Hanford, CA issued this flash flood warning at Aug 30, 2012, 4:29 PM PDT for Kern County, California. It was in force for 96 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 30, 2012, 4:29 PM PDT (23:29 UTC)
Expired
Aug 30, 2012, 6:05 PM PDT
In force
96 min
Issued by
NWS Hanford, CA
Area
Storm-based polygon
Flood severity
None

County Kern County, CA

The nearest sounding before it

Edwards AFB, CA (KEDW), launched 12:00Z, 11.5 hours before the alert went out and 11 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-pSkew-T log-p diagram, Edwards AFB, CA at 12:00Z on 2012-08-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Edwards AFB, CA at 12:00Z on 2012-08-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -36 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2894 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
-36 m²/s²
0-3 km storm-relative helicity
16 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.

969 
WGUS56 KHNX 302329
FFWHNX
CAC029-310230-
/O.NEW.KHNX.FF.W.0002.120830T2329Z-120831T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY CA
429 PM PDT THU AUG 30 2012

THE NATIONAL WEATHER SERVICE IN HANFORD CA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN KERN COUNTY IN CENTRAL CALIFORNIA INCLUDING ROGERS 
  DRY LAKE ON EDWARDS AIR FORCE BASE...

* UNTIL 730 PM PDT

* AT 417 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA.

* THE STORM PRODUCING FLASH FLOODING WILL OTHERWISE REMAIN OVER
  MAINLY RURAL AREAS OF THE INDICATED COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

&&

LAT...LON 3482 11764 3482 11787 3500 11775 3499 11763
      3495 11762 3483 11762

$$

SANGER

WEATHER.GOV/HANFORD
1 follow-up statement
055 
WGUS76 KHNX 310105
FFSHNX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY CA
605 PM PDT THU AUG 30 2012

CAC029-310114-
/O.CAN.KHNX.FF.W.0002.000000T0000Z-120831T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KERN CA-
605 PM PDT THU AUG 30 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHEASTERN KERN
COUNTY...

THE THUNDERSTORMS HAVE MOVED TO THE NORTHEAST OF EDWARDS AIR FORCE 
BASE AND INTO SAN BERNARDINO COUNTY.

LAT...LON 3482 11764 3482 11787 3500 11775 3499 11763
      3495 11762 3483 11762

$$

SANGER

WEATHER.GOV/HANFORD

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 30, 1:28 PM PDTSpecial Weather StatementHNX77 min
Aug 30, 2:51 PM PDTSpecial Weather StatementHNX39 min
Aug 30, 3:26 PM PDTSevere Thunderstorm WarningHNXKern34 min
Aug 30, 4:04 PM PDTAreal Flood AdvisoryHNXKern6 hr

Nearby

Flash Flood Warnings in California, 2012Every flash flood warning 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; the sounding from the Mesonet's radiosonde archive.