Alert archive / California / Red Flag Warnings in 2009

Red Flag Warning 2, NWS Hanford, CA

April 6, 2009

NWS Hanford, CA issued this red flag warning at Apr 6, 2009, 6:18 PM PDT. It was in force for 3 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: Apr 6, 2009, 6:18 PM PDT (01:18 UTC)
Expired: Apr 6, 2009, 9:06 PM PDT
In force: 3 hr
Issued by: NWS Hanford, CA

The text

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

000 
WWUS86 KHNX 070118
RFWHNX

RED FLAG WARNING
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
618 PM PDT MON APR 6 2009

CAZ292-295-070700-
/O.EXP.KHNX.FW.W.0001.000000T0000Z-090407T0100Z/
/O.NEW.KHNX.FW.W.0002.090407T0118Z-090407T0700Z/
SOUTHEASTERN SAN JOAQUIN VALLEY-KERN COUNTY MOUNTAINS-
618 PM PDT MON APR 6 2009

...RED FLAG WARNING FOR VERY LOW HUMIDITIES AND GUSTY WINDS IN
EFFECT UNTIL MIDNIGHT PDT TONIGHT FOR THE TEHACHAPI MOUNTAINS AND
THE SOUTH END OF THE SAN JOAQUIN VALLEY...

THE NATIONAL WEATHER SERVICE IN HANFORD HAS ISSUED A RED FLAG
WARNING FOR VERY LOW HUMIDITIES AND GUSTY WINDS...WHICH IS IN
EFFECT UNTIL MIDNIGHT PDT TONIGHT FOR THE TEHACHAPI MOUNTAINS AND
THE SOUTH END OF THE SAN JOAQUIN VALLEY. THIS IS AN EXTENSION OF
THE RED FLAG WARNING THAT HAD BEEN IN EFFECT UNTIL 600 PM PDT THIS
EVENING.

A SOUTHEAST FLOW OVER THE TEHACHAPI MOUNTAINS CONTINUES TO
GENERATE LOCALLY GUSTY WINDS OVER THE GRAPEVINE AND INTO THE
SOUTH END OF THE SAN JOAQUIN VALLEY INCLUDING THE BAKERSFIELD AREA.
SOUTHEAST WINDS OF 15 TO 25 MPH WITH GUSTS UP TO 45 MPH WILL
CONTINUE AT TIMES OVER THE RIDGES THROUGH THE EVENING. RELATIVE
HUMIDITY VALUES HAVE BEEN BELOW 10 PERCENT FOR SEVERAL HOURS IN
SOME LOCATIONS AND THESE CONDITIONS ARE EXPECTED TO PERSIST
THROUGH MIDNIGHT BEFORE IMPROVING.

A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF
STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES
WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. PLEASE ADVISE THE
APPROPRIATE OFFICIALS OR FIRE CREWS IN THE FIELD OF THIS RED
FLAG WARNING.

$$

SANGER

WEATHER.GOV/HANFORD

1 follow-up statement

000 
WWUS86 KHNX 070406
RFWHNX

RED FLAG WARNING
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
906 PM PDT MON APR 6 2009

...CONDITIONS IMPROVING OVER THE TEHACHAPI MOUNTAINS AND SOUTH END
OF THE SAN JOAQUIN VALLEY...

.WINDS ARE SUBSIDING OVER THE TEHACHAPI MOUNTAINS AND THE SOUTH
END OF THE SAN JOAQUIN VALLEY. SOME HUMIDITY RECOVERY IS LIKELY AS
TEMPERATURES CONTINUE TO COOL.

CAZ292-295-070515-
/O.CAN.KHNX.FW.W.0002.000000T0000Z-090407T0700Z/
SOUTHEASTERN SAN JOAQUIN VALLEY-KERN COUNTY MOUNTAINS-
906 PM PDT MON APR 6 2009

...RED FLAG WARNING FOR VERY LOW HUMIDITIES AND GUSTY WINDS IS
CANCELLED FOR THE TEHACHAPI MOUNTAINS AND THE SOUTH END OF THE SAN
JOAQUIN VALLEY...

THE NATIONAL WEATHER SERVICE IN HANFORD HAS CANCELLED THE RED
FLAG WARNING FOR FOR THE TEHACHAPI MOUNTAINS AND THE SOUTH END OF
THE SAN JOAQUIN VALLEY.

WINDS ARE DIMINISHING OVER THE TEHACHAPI MOUNTAINS AND THE SOUTH
END OF THE SAN JOAQUIN VALLEY. ONLY A FEW LOCATIONS CONTINUE TO
HAVE SINGLE DIGIT HUMIDITIES...AND HUMIDITY RECOVERY SHOULD
CONTINUE AS TEMPERATURES COOL OVERNIGHT.

$$

SANGER

WEATHER.GOV/HANFORD

What forecasters said that day

The local office's own words before this red flag 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 red flag warning went out at Apr 6, 2:15 PM PDT, 4 hours 3 minutes earlier.

Area forecast discussion, Apr 6, 2:15 PM PDT, 4 hours 3 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
215 PM PDT MON APR 6 2009

.DISCUSSION...A WARM SOUTHERLY UPPER FLOW AND SUNNY SKIES HAVE
PROVIDED OUR AREA WITH AN UNUSUALLY WARM DAY FOR EARLY APRIL.
TEMPERATURES ARE GENERALLY RUNNING 5 TO 8 DEG F ABOVE YDAY/S
READINGS AND MAY REACH 90 DEG F IN THE SOUTH END OF THE SAN
JOAQUIN VALLEY LATER TODAY AS A RESULT OF STRONG DOWNSLOPE OVER
THE TEHACHAPI MOUNTAINS. THE STRONG WINDS HAVE GENERALLY BEEN
LOCALIZED TO THE GRAPEVINE AREA AND THE EXTREME SOUTH END OF THE
SAN JOAQUIN VALLEY. HAVE COVERED THIS WITH A SPECIAL WEATHER
STATEMENT.

A CHANGE IS EXPECTED BY TUESDAY AS A LARGE OFFSHORE UPPER LOW
PRESSURE SYSTEM NEAR 33N/132W APPROACHES THE CA COAST AND SPREADS
INCREASING MOISTURE AND MUCH COOLER AIR INTO CENTRAL CA TUESDAY
AFTERNOON AND EVENING. THE MAIN CONCERN FOR TUESDAY IS THE
POTENTIAL FOR SCATTERED T-STORMS ACROSS THE CENTRAL/SOUTH SAN
JOAQUIN VALLEY AND THE SOUTHERN SIERRA FOOTHILLS WITH WRF/GFS/EC
PROGS ALL INDICATING INCREASED INSTABILITY AND CAPE IN THE
AFTERNOON AS A COLD UPPER LOW MOVES OVER A PREVAILING WARM
AIRMASS. THE LOW WILL CROSS CENTRAL CA TUESDAY NIGHT BRINGING A
QUICK SHOT OF STEADY PRECIPITATION TO OUR AREA TUESDAY NIGHT AND
WEDNESDAY MORNING. RFC QPF PROGS SUGGESTING BETWEEN A TENTH AND A
QUARTER OF AN INCH FOR MUCH OF THE CENTRAL AND SOUTH VALLEY WHILE
UPSLOPE FAVORED AREAS OF THE SOUTHERN SIERRA NEVADA MOUNTAINS WILL
RECEIVE UP TO AN INCH OF LIQUID EQUIVALENT. SNOW LEVELS WILL BE ON
THE HIGH SIDE AS THE MOISTURE PUSHES INTO OUR AREA ON
TUESDAY...AROUND 8500 FEET OVER YOSEMITE PARK TO 7500 FEET TO 8500
FEET OVER THE TEHACHAPI MOUNTAINS. SNOW LEVELS ARE PROGGED TO
PLUMMET TO 4500 TO 5000 FEET BY WEDNESDAY MORNING AS A RESULT OF
CAA BEHIND THE UPPER LOW. SINCE QPF PROGS DO NOT SUPPORT A WINTER
STORM WARNING AND BECAUSE OF TIMING UNCERTAINTIES WITH THIS
SYSTEM...WILL HOLD OFF ON ISSUING ANY WINTER WEATHER HIGHLIGHTS
WITH THIS STORM FOR NOW. HOWEVER...A WINTER WEATHER ADVISORY WILL
PROBABLY BE NEEDED FOR THE SOUTHERN SIERRA NEVADA MOUNTAINS FOR
THE LATE TUESDAY NIGHT/EARLY WEDNESDAY TIME FRAME. WRF/GFS/EC ALL
INDICATE THE LOW TRACKING INTO THE GREAT BASIN BY WEDNESDAY
AFTERNOON/EVENING WITH DECREASING SHOWERS OVER OUR AREA AS A
SHORTWAVE RIDGE PUSHES INTO CA WEDNESDAY NIGHT.

HOWEVER...THE NEXT UPPER LOW IS PROGGED TO REACH THE NORCAL COAST BY
THURSDAY AFTERNOON THEN DROP SOUTHWARD OFF THE CA COAST THURSDAY
NIGHT AND FRIDAY PROVIDING OUR AREA WITH ANOTHER ROUND OF RAIN AND
HIGHER ELEVATION SNOW THURSDAY NIGHT THROUGH FRIDAY EVENING. THIS
LOW IS PROGGED TO PUSH INLAND NEAR THE CA/BAJA BORDER FRIDAY NIGHT
AND SATURDAY THEN THE ENSEMBLE MEAN SUGGESTS A RIDGE BUILDING INTO
CA BY SUNDAY SHIFTING THE STORM TRACK NORTH OF OUR AREA AND
TEMPERATURES RISING TO NEAR CLIMO FOR MID APRIL FOR THE BEGINNING
OF NEXT WEEK.

&&

.AVIATION...STRONG DOWNSLOPE WINDS ARE EXPECTED TO CONTINUE ACROSS
THE FAR SOUTHERN SJV INCLUDING KBFL SOUTH TO THE TEHACHAPIS THROUGH
EARLY THIS EVENING. WIND GUSTS OF UP TO 40 KT WILL BE POSSIBLE IN
THOSE DOWNSLOPE FAVORABLE AREAS UNDER A PERSISTENT SOUTHEAST FLOW.
OTHERWISE...VFR CONDITIONS ARE EXPECTED THROUGH 00Z WEDNESDAY ACROSS
THE CENTRAL CALIFORNIA INTERIOR...EXCEPT LOCAL MVFR IN RAIN AND
ISOLATED THUNDERSTORMS AFTER 20Z.

&&

.AIR QUALITY ISSUES...NONE.

&&

.HNX WATCHES/WARNINGS/ADVISORIES...
RED FLAG WARNING UNTIL 6 PM PDT THIS EVENING FOR CAZ292-295.

&&

PUBLIC...DS
AVN/FW...BEAN

WEATHER.GOV/HANFORD

Hazardous weather outlook, Apr 6, 4:09 PM PDT, 2 hours 9 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
409 PM PDT MON APR 6 2009

CAZ089>091-093-094-072315-
WEST CENTRAL SAN JOAQUIN VALLEY-EAST CENTRAL SAN JOAQUIN VALLEY-
SOUTHWESTERN SAN JOAQUIN VALLEY-
MARIPOSA MADERA AND FRESNO COUNTY FOOTHILLS-
TULARE COUNTY FOOTHILLS-
409 PM PDT MON APR 6 2009

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

.DAY ONE...TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

THERE IS A CHANCE FOR AFTERNOON AND EVENING THUNDERSTORMS TUESDAY.
SOME THUNDERSTORMS MAY CONTAIN LIGHTNING, HAIL AND HEAVY RAIN.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION WILL NOT BE NEEDED.

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT OR
UNUSUAL CONDITIONS TO THE NATIONAL WEATHER SERVICE.

WEATHER.GOV/HANFORD

CAZ092-095-072315-
SOUTHEASTERN SAN JOAQUIN VALLEY-KERN COUNTY MOUNTAINS-
409 PM PDT MON APR 6 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE FAR SOUTHERN SAN JOAQUIN
VALLEY INCLUDING THE BAKERSFIELD AREA AND ADJACENT PORTIONS OF
THE TEHACHAPI MOUNTAINS INCLUDING THE GRAPEVINE AREA.

.DAY ONE...TONIGHT

A RED FLAG WARNING IN EFFECT UNTIL 6 PM PDT THIS EVENING
FOR THE FAR SOUTHERN SAN JOAQUIN VALLEY INCLUDING THE BAKERSFIELD
AREA AND ADJACENT PORTIONS OF THE TEHACHAPI MOUNTAINS INCLUDING
THE GRAPEVINE AREA.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

THERE IS A CHANCE FOR AFTERNOON AND EVENING THUNDERSTORMS TUESDAY
FOR THE SOUTHEASTERN SAN JOAQUIN VALLEY. SOME THUNDERSTORMS MAY
CONTAIN LIGHTNING, HAIL AND HEAVY RAIN. NO HAZARDOUS WEATHER IS
EXPECTED FOR THE KERN COUNTY MOUNTAIN AREA AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION WILL NOT BE NEEDED.

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT OR
UNUSUAL CONDITIONS TO THE NATIONAL WEATHER SERVICE.

WP

WEATHER.GOV/HANFORD

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 7, 4:48 AM PDT	Winter Weather Advisory	HNX		30 hr
Apr 7, 10:54 AM PDT	Wind Advisory	HNX		7 hr

Nearby

Red Flag Warnings in California, 2009 Every red flag warning in 2009

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.