Alert archive / California / Flash Flood Warnings in 2007

Flash Flood Warning 4, NWS Hanford, CA

September 1, 2007Kern County, California

NWS Hanford, CA issued this flash flood warning at Sep 1, 2007, 4:43 PM PDT for Kern County, California. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 1, 2007, 4:43 PM PDT (23:43 UTC)
Expired: Sep 1, 2007, 6:45 PM PDT
In force: 2 hr
Issued by: NWS Hanford, CA
Area: Counties, with a storm outline in the text
Flood severity: None

County Kern County, CA

The nearest sounding before it

Vandenberg AFB, CA (KVBG), launched 12:00Z, 11.7 hours before the alert went out and 175 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1800 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -36 m²/s²
0-3 km storm-relative helicity: 62 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.

000 
WGUS56 KHNX 012344
FFWHNX
CAC029-020145-
/X.NEW.KHNX.FF.W.0004.070901T2343Z-070902T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY CA
443 PM PDT SAT SEP 1 2007

THE NATIONAL WEATHER SERVICE IN HANFORD CA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EXTREME SOUTH CENTRAL KERN COUNTY IN CENTRAL CALIFORNIA...

* UNTIL 645 PM PDT

* AT 436 PM PDT...FLASH FLOODING WAS REPORTED FROM A THUNDERSTORM
  IN THE VICINITY OF ROSAMOND.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ROSAMOND

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

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.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

LAT...LON 3492 11833 3492 11811 3483 11811 3483 11832
TIME...MOT...LOC 2343Z 180DEG 0KT 3483 11822

$$

KD

1 follow-up statement

000 
WGUS76 KHNX 020140
FFSHNX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY CA
638 PM PDT SAT SEP 1 2007

CAC029-020148-
/X.EXP.KHNX.FF.W.0004.000000T0000Z-070902T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KERN CA-
638 PM PDT SAT SEP 1 2007

...THE FLASH FLOOD WARNING WILL EXPIRE AT 645 PM PDT FOR EXTREME
SOUTH CENTRAL KERN COUNTY...

HEAVY RAIN AND POSSIBLE FLOODING HAS SUBSIDED OVER THE WARNED AREA 
AND RADAR ESTIMATES OF UP TO 4 INCHES OF RAIN WERE NOTED. THE STORMS 
HAVE WEAKENED AND THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE.


LAT...LON 3492 11833 3492 11811 3483 11811 3483 11832
TIME...MOT...LOC 0138Z 180DEG 0KT 3483 11822

$$

JDB

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Hanford, CA wrote its last area forecast discussion before this flash flood warning went out at Sep 1, 2:47 PM PDT, 1 hour 56 minutes earlier.

Area forecast discussion, Sep 1, 2:47 PM PDT, 1 hour 56 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
247 PM PDT SAT SEP 1 2007

.DISCUSSION...CLOUDS CONTINUE BUILDING OVER THE HIGHER ELEVATIONS
AS CONVECTION FLAIRS UP AGAIN THIS AFTERNOON. YET...WITH THE FLOW
ALOFT MORE WESTERLY TODAY...WILL KEEP CONVECTION CONFINED TO THE
MOUNTAINS AND POSSIBLY THE DESERTS. WILL MAINTAIN PRECIP POTENTIAL
AT SLIGHT CHANCE LEVELS AS INSTABILITY REMAINS WEAK THIS
AFTERNOON. HOWEVER...AS MODELS MAINTAIN HIGHER LAYER PRECIPITABLE
WATER VALUES OVER THE SOUTHERN SECTIONS OF THE DISTRICT...CAN NOT
RULE OUT POSSIBLE THUNDERSTORMS.

CURRENT 24 HOUR TREND STILL SHOWING VERY LITTLE CHANGE IN
TEMPERATURES WITH DEW POINTS RUNNING SLIGHTLY LOWER. AT THE 850MB
LEVEL...TEMPERATURES ARE EXPECTED TO REACH THE 25-27 DEC-C RANGE
ON SUNDAY. THIS WILL TRANSLATE IN SURFACE READINGS ONCE AGAIN
REACHING THE 100 TO 108 DEG-F RANGE. YET...DEW POINTS ALONG WITH
TEMPERATURES ARE JUST MAKING THE RANGE OF PRODUCING HEAT ADVISORY
CRITERIA INDICES. THEREFORE...WILL MAINTAIN THE HEAT ADVISORY FOR
TONIGHT AND INTO SUNDAY. AFTER SUNDAY...MODELS PROG A WEAK TROF
WILL APPROACH THE PACIFIC NORTHWEST. CURRENT TIMING AS THE TROF
AXIS OVER THE REGION ON TUESDAY. THIS TROF IS PROGGED TO BE
PROGRESSIVE AND WILL PASS QUICKLY INTO THE ROCKIES BY WEDNESDAY.
YET...MAY SEE A GRADUAL COOL DOWN /SLIGHT/ EARLY NEXT WEEK. THE
FLOW BECOMES MORE NORTHWESTERLY BEHIND THE TROF WHICH MAY KEEP THE
DISTRICT COOLER THROUGH THE REST OF THE WEEK. IN ADDITION...THE
NORTHWEST FLOW ALOFT WILL MAINTAIN A DRY FORECAST AFTER TROF
PASSAGE.

&&

.AVIATION...ISOLATED SHOWERS AND THUNDERSTORMS WILL PRODUCE LOCAL
MOUNTAIN OBSCURATIONS ACROSS THE SOUTHERN SIERRA NEVADA THROUGH 05Z
SUNDAY. OTHERWISE...VFR CONDITIONS CAN BE EXPECTED THROUGH 00Z
MONDAY.

FOR SPECIFIC DETAILS...PLEASE REFER TO THE TAFS FOR KMCE...KFAT AND
KBFL...AND TWEB ROUTES 421 AND 423.

&&

.AIR QUALITY ISSUES...NONE

&&

.HNX WATCHES/WARNINGS/ADVISORIES...HEAT ADVISORY UNTIL 7 PM PDT
 SUNDAY FOR THE CENTRAL AND SOUTHERN SAN JOAQUIN VALLEY AND THE
 ADJACENT FOOTHILLS /CAZ089>094/.

&&

PUBLIC...MOLINA
AVN/FW...DCH

WEATHER.GOV/HANFORD

Hazardous weather outlook, Sep 1, 6:01 AM PDT, 10 hours 42 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
601 AM PDT SAT SEP 1 2007

CAZ089>094-021315-
WEST CENTRAL SAN JOAQUIN VALLEY-EAST CENTRAL SAN JOAQUIN VALLEY-
SOUTHWESTERN SAN JOAQUIN VALLEY-SOUTHEASTERN SAN JOAQUIN VALLEY-
MARIPOSA MADERA AND FRESNO COUNTY FOOTHILLS-
TULARE COUNTY FOOTHILLS-
601 AM PDT SAT SEP 1 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE CENTRAL AND SOUTHERN
SAN JOAQUIN VALLEY AND THE ADJACENT FOOTHILLS.

.DAY ONE...TODAY AND TONIGHT

A HEAT ADVISORY IS IN EFFECT FOR TODAY FROM 2 PM UNTIL 7 PM.
PLEASE REFER TO THE LATEST WEATHER MESSAGE ISSUED BY THE NATIONAL
WEATHER SERVICE OFFICE IN HANFORD AT /WWUS76 KHNX/ OR /SFONPWHNX/
FOR FURTHER DETAILS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

A HEAT ADVISORY CONTINUES FOR SUNDAY FROM 2 PM UNTIL 7 PM.
PLEASE REFER TO THE LATEST WEATHER MESSAGE ISSUED BY THE NATIONAL
WEATHER SERVICE OFFICE IN HANFORD AT /WWUS76 KHNX/ OR /SFONPWHNX/
FOR FURTHER DETAILS.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS TO THE SAN JOAQUIN VALLEY NATIONAL WEATHER SERVICE
OFFICE.

WEATHER.GOV/HANFORD

JEB

In the hours before

Local storm report, Sep 1, 4:15 PM PDT, 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY CA
415 PM PDT SAT SEP 01 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0407 PM     FUNNEL CLOUD     2 S ROSAMOND            34.83N 118.20W
09/01/2007                   KERN               CA   LAW ENFORCEMENT

            PUBLIC REPORTS OF A FUNNEL CLOUD RELAYED THROUGH KERN
            COUNTY SHERIFF BETWEEN ROSAMOND AND LANCASTER.

&&

STACHELSKI

Local storm report, Sep 1, 4:22 PM PDT, 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY CA
422 PM PDT SAT SEP 01 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0412 PM     TORNADO          ROSAMOND                34.86N 118.20W
09/01/2007                   KERN               CA   TRAINED SPOTTER

            TRAINED WEATHER SPOTTER REPORTED A TORNADO IN ROSAMOND
            NEAR SIERRA HIGHWAY AND HIGHWAY 14.

&&

CTS/JDB

Local storm report, Sep 1, 4:43 PM PDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY CA
443 PM PDT SAT SEP 01 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0440 PM     TSTM WND DMG     ROSAMOND                34.86N 118.20W
09/01/2007                   KERN               CA   TRAINED SPOTTER

            A SPOTTER REPORTED A POWER POLE ON A HOUSE ON 53RD STREET
            ON THE WEST SIDE OF ROSAMOND. TIME LISTED IS WHEN EVENT
            WAS REPORTED TO NWS HNX. ACTUAL TIME MAY HAVE BEEN
            EARLIER.

&&

CTS/KD

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 31, 5:52 PM PDT	Flash Flood Warning	HNX	Kern	83 min
Aug 31, 6:24 PM PDT	Severe Thunderstorm Warning	HNX	Kern	36 min
Sep 1, 4:09 PM PDT	Tornado Warning	HNX	Kern	36 min
Sep 1, 4:44 PM PDT	Tornado Warning	HNX	Kern	31 min

Nearby

Flash Flood Warnings in California, 2007 Every flash flood warning in 2007

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.