Red Flag Warning 4, NWS Reno, NV

000 
WWUS85 KREV 210342
RFWREV

RED FLAG WARNING
NATIONAL WEATHER SERVICE RENO NV
842 PM PDT WED JUN 20 2007

NVZ450-211400-
/O.EXP.KREV.FW.W.0004.000000T0000Z-070621T0400Z/
/O.CON.KREV.FW.A.0004.070622T1900Z-070623T0500Z/
/O.CON.KREV.FW.A.0005.070623T1700Z-070624T0500Z/
WESTERN NEVADA SIERRA FRONT-
842 PM PDT WED JUN 20 2007

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON
THROUGH FRIDAY EVENING...
...FIRE WEATHER WATCH REMAINS IN EFFECT FROM SATURDAY MORNING
THROUGH SATURDAY EVENING...
...RED FLAG WARNING WILL EXPIRE AT 9 PM PDT THIS EVENING...

THE RED FLAG WARNING WILL EXPIRE AT 9 PM PDT THIS EVENING. A FIRE
WEATHER WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON THROUGH
FRIDAY EVENING. A FIRE WEATHER WATCH REMAINS IN EFFECT FROM
SATURDAY MORNING THROUGH SATURDAY EVENING. 

FOR FRIDAY AND SATURDAY...STRONG WINDS ARE EXPECTED AGAIN. WEST
WINDS OF 15 TO 30 MPH WITH GUSTS TO 40 MPH ARE POSSIBLE BOTH
FRIDAY AND SATURDAY AFTERNOON AND EVENING WITH THE STRONGEST GUSTS
LIKELY ON SATURDAY. AFTERNOON HUMIDITY WILL REMAIN NEAR 10% AFTER
POOR OVERNIGHT RECOVERY.

A FIRE WEATHER WATCH MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE FORECAST TO OCCUR. LISTEN FOR LATER FORECASTS AND POSSIBLE
RED FLAG WARNINGS.

$$

CAZ270-271-273-278-NVZ458-211400-
/O.CON.KREV.FW.A.0004.070622T1900Z-070623T0500Z/
/O.CON.KREV.FW.A.0005.070623T1700Z-070624T0500Z/
SURPRISE VALLEY CALIFORNIA-WESTERN LASSEN-EASTERN PLUMAS-
EASTERN SIERRA-EASTERN NEVADA COUNTIES-MONO-
EASTERN ALPINE COUNTIES-EASTERN LASSEN COUNTY-
NORTHERN WASHOE COUNTY-
842 PM PDT WED JUN 20 2007

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON
THROUGH FRIDAY EVENING...
...FIRE WEATHER WATCH REMAINS IN EFFECT FROM SATURDAY MORNING
THROUGH SATURDAY EVENING...

A FIRE WEATHER WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON
THROUGH FRIDAY EVENING. A FIRE WEATHER WATCH REMAINS IN EFFECT
FROM SATURDAY MORNING THROUGH SATURDAY EVENING. 

WEST TO SOUTHWEST WINDS ARE EXPECTED TO INCREASE ACROSS NORTHEAST
CALIFORNIA...NORTHWEST NEVADA AND MONO COUNTY ON FRIDAY AND
SATURDAY. WIND SPEEDS OF 15 TO 25 MPH WITH GUSTS TO 40 MPH ARE
POSSIBLE BOTH AFTERNOONS WITH THE STRONGEST WINDS OVER THE DESERT
AREAS. IN ADDITION...RELATIVE HUMIDITY WILL DROP TO 10 TO
15 PERCENT DURING THE AFTERNOONS.

A FIRE WEATHER WATCH MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE FORECAST TO OCCUR. LISTEN FOR LATER FORECASTS AND POSSIBLE
RED FLAG WARNINGS.

$$

CAZ272-211400-
/O.CON.KREV.FW.A.0004.070622T1900Z-070623T0300Z/
/O.CON.KREV.FW.A.0005.070623T1700Z-070624T0300Z/
GREATER LAKE TAHOE AREA-
842 PM PDT WED JUN 20 2007

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON
THROUGH FRIDAY EVENING...
...FIRE WEATHER WATCH REMAINS IN EFFECT FROM SATURDAY MORNING
THROUGH SATURDAY EVENING...

A FIRE WEATHER WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON
THROUGH FRIDAY EVENING. A FIRE WEATHER WATCH REMAINS IN EFFECT
FROM SATURDAY MORNING THROUGH SATURDAY EVENING. 

WEST TO SOUTHWEST WINDS ARE EXPECTED TO INCREASE ACROSS THE LAKE
TAHOE BASIN ON FRIDAY AND SATURDAY. WIND SPEEDS OF 15 TO 25 MPH
WITH GUSTS TO 40 MPH ARE POSSIBLE BOTH AFTERNOONS WITH THE
STRONGEST WINDS EXPECTED SATURDAY AFTERNOON. IN ADDITION...
RELATIVE HUMIDITY WILL DROP TO NEAR 15 PERCENT DURING THE
AFTERNOONS.

A FIRE WEATHER WATCH MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE FORECAST TO OCCUR. LISTEN FOR LATER FORECASTS AND POSSIBLE
RED FLAG WARNINGS.

$$

NVZ453-459-211400-
/O.CON.KREV.FW.A.0005.070623T1700Z-070624T0500Z/
WEST CENTRAL NEVADA BASIN AND RANGE-
MINERAL AND SOUTHERN LYON COUNTIES-
842 PM PDT WED JUN 20 2007

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM SATURDAY MORNING
THROUGH SATURDAY EVENING...

A FIRE WEATHER WATCH REMAINS IN EFFECT FROM SATURDAY MORNING
THROUGH SATURDAY EVENING. 

WINDS ARE EXPECTED TO INCREASE SATURDAY AFTERNOON AND EVENING AS
A COLD FRONT APPROACHES THE AREA. WEST TO SOUTHWEST WINDS OF
15 TO 30 MPH WITH GUSTS TO 40 MPH ARE POSSIBLE SATURDAY AFTERNOON
AND EVENING. IN ADDITION...RELATIVE HUMIDITY WILL DROP BELOW
10 PERCENT IN THE AFTERNOON.

A FIRE WEATHER WATCH MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE FORECAST TO OCCUR. LISTEN FOR LATER FORECASTS AND POSSIBLE
RED FLAG WARNINGS.

$$

HTTP://WEATHER.GOV/RENO/FIRE

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RENO NV
200 PM PDT WED JUN 20 2007

.SHORT TERM...
FORECAST STILL ON TRACK FOR SOUTHWEST FLOW ALOFT THURSDAY AND FRIDAY
BETWEEN THE UPPER LOW OFF OF THE BC COAST AND HIGH PRESSURE SOUTHERN
CONUS. AS LOW BEGINS TO MOVE EAST ON FRIDAY UPPER LEVEL WINDS
WILL INCREASE AS TROUGH BEGINS TO EDGE TOWARD THE WEST COAST. THIS
WILL RESULT IN CONTINUED WARM AND DRY BUT WINDY CONDITIONS ACROSS
THE AREA. SATURDAY A MODERATELY STRONG SHORTWAVE ROTATES AROUND THE
UPPER LOW INTO NORTHERN CA AND SKIRTS ACROSS NORTHWEST NV LATE
SATURDAY. THE COLD FRONT ASSOCIATED WITH TROUGH AND REINFORCED BY
SATURDAYS SHORTWAVE WILL PUSH INTO NORTHEAST CA AND FAR NORTHWEST NV
LATE IN THE DAY SATURDAY. AS THE SHORTWAVE PULLS OFF TO THE
NORTHEAST THE AREA IS UNDER MORE ZONAL FLOW...RESULTING IN AN
EAST-WEST ORIENTATION TO THE FRONT ROUGHLY NEAR OR A SVE-WMC LINE BY
EARLY SUNDAY.

MAIN FORECAST CONCERNS ARE WINDS WHICH WILL INCREASE FRIDAY AND MORE
SO ON SATURDAY. IN ADDITION TEMPERATURES ACROSS THE REGION SATURDAY
...DEPENDING ON TIMING OF THE FRONTAL PASSAGE... WILL DROP ANYWHERE
FROM 6-10 DEGREES FROM RENO-TAHOE NORTH TO 3 TO 6 DEGREES FROM
INTERSTATE 80 SOUTH. ADJUSTED SATURDAYS MAX TEMPERATURES TO REFLECT
THIS CHANGE.

SEE FIRE WEATHER DISCUSSION BELOW FOR DETAILS ON WINDS AND FIRE
WEATHER ISSUES.

.LONG TERM...SUNDAY THROUGH WEDNESDAY...
NO MAJOR CHANGES TO EXTENDED.  MODELS CONTINUE TO SHOW AN UPPER LOW
MOVING THROUGH THE PACIFIC NW ON SUNDAY WITH THE STRONG RIDGE
EXTENDING FROM THE SWRN CONUS EAST TO THE SRN PLAINS.  THE HEIGHT
AND PRESSURE GRADIENTS BETWEEN THESE TWO FEATURES WILL CAUSE STRONG
AND GUSTY WSWLY WINDS ACROSS THE KREV CWFA ON SUNDAY.  ON MONDAY THE
UPPER LOW SHOULD BE OVER THE CANADIAN PRAIRIES WITH THE SWRN RIDGE
BUILDING BACK WEST INTO THE SWRN CONUS.  THE PROGRESSIVE FLOW ACROSS
THE NRN TIER WILL CONTINUE ON TUES AS ANOTHER UPPER LOW APPROACHES
THE BRITISH COLUMBIA COAST.  THIS DEEPENING LOW SHOULD HELP TO
AMPLIFIY THE SYNOPTIC PATTERN WITH UPPER LEVEL WINDS BACKING TO
SWLY.  THE SWRN RIDGE WILL BE THE MAIN INFLUENCE OVER OUR WEATHER
THROUGH THE EXTENDED.

TEMPERATURES WILL CONTINUE ABOVE NORMAL WITH A GRADUAL WARMING TREND
SUNDAY THROUGH WEDNESDAY.  AFTN TEMPS WILL BE AROUND 10 DEGREES
ABOVE NORMAL TUESDAY AND WEDNESDAY AS THE RIDGE OVER THE SRN PLAINS
BUILDS BACK TO THE WEST.  SLY FLOW ON THE WEST SIDE OF THE RIDGE
WILL CONTRIBUTE TO INCREASING WAA.  HIGH TEMPS TUESDAY AND WEDNESDAY
AFTNS SHOULD BE IN THE LWR TO MID 90S ACROSS WRN NEVADA AND IN THE
80 IN THE SIERRA.  HAVE ALSO KEPT A SLIGHT CHANCE OF TSTMS OVER ERN
MONO AND SRN MINERAL COUNTIES TUES AND WED AFTN AND EVENING WITH
MORE SLY FLOW OVER THE REGION AND THE HIGH SURFACE TEMPERATURES
CONTRIBUTING TO SUBSTANTIAL LLVL INSTABILITY.  OHARA

&&

.AVIATION...
VFR CONDITIONS WILL CONTINUE THROUGH THURSDAY.  GUSTY WSWLY WINDS
CAN BE EXPECTED THIS AFTN AND EVENING AND AGAIN THURSDAY AFTN AND
EVENING. OHARA

&&

.FIRE WEATHER...
WINDS INCREASING ACROSS THE SIERRA FRONT AT THIS TIME. WINDS
EXPECTED TO REACH RED FLAG CRITERIA SHORTLY AS RIDGE WINDS AND SFC
GRADIENTS SUPPORT GUSTS AT LEAST AS STRONG AS YESTERDAY. WARNING
ALREADY OUT AND WILL BE CONTINUED THROUGH THIS EVENING. IN OTHER
AREAS EAST OF THE SIERRA...GUSTS WILL LOCALLY REACH CRITERIA LIKE
THE WALKER RIVER CANYON IN MONO COUNTY AND PERHAPS NEAR RAVENDALE IN
EASTERN LASSEN COUNTY. WILL CONTINUE TO MONITOR IN THE NEXT COUPLE
AREAS TO SEE IF THE CONDITIONS WILL BE MORE WIDESPREAD THAN EXPECTED
AND EXPAND RFW IF NECESSARY.

OTHERWISE...BIG STORY WILL BE STRONG WINDS FRIDAY AND SATURDAY AFTER
TOMORROWS RELATIVE LULL. LOCAL CRITICAL CONDITIONS ALONG THE SIERRA
FRONT LOOK POSSIBLE THU...BUT SHOULD BE THE LIGHTEST WIND DAY. BY
FRIDAY...MODELS IN BETTER AGREEMENT WITH TIMING OF THE FRONT...AND
SFC GRADIENT WILL REMAIN STRONG WEST TO EAST. IN ADDITION...WARM
TEMPS FRI WILL RESULT IN A GOOD THERMAL GRADIENT WITH H7 WINDS
15-20KTS. SHOULD BE EASY TO REACH CRITERIA IN THE SIERRA AND NORTH
OF HIGHWAY 50 ALONG THE SIERRA FRONT. WILL ISSUE A WATCH AND ONLY
LEAVE OUT ZONES 453/459 BUT THEY WILL BE CLOSE. 271 IS A WILD CARD
AS TIMBER AREAS ARE HARD TO REACH CRITERIA...BUT BECAUSE IT WILL BE
A FAIRLY BIG EVENT...WILL ISSUE THE WATCH TOO.

SATURDAY LOOKS TO BE THE BIGGEST DAY FOR WINDS AND WILL BLANKET THE
ENTIRE AREA WITH A WATCH. AREAS SOUTH OF I-80 SHOULD WILL HAVE NO
ISSUES...BUT AREAS TO THE NORTH MAY NOT SEE HUMIDITY DROP BELOW 20%.
HOWEVER...WINDS WILL BE BLOWING HARD EVERYWHERE WITH GUSTS TO 45 MPH
POSSIBLE AS H7 WINDS ARE NEAR 30 KTS WITH H5 WINDS OF 50+. BELIEVE
THE WATCH IS WARRANTED AND MAY NOT NEED AS LOW RH IF WINDS WILL BE
THAT STRONG. WALLMANN

&&

.REV WATCHES/WARNINGS/ADVISORIES...
NV...FIRE WEATHER WATCH FROM FRIDAY AFTERNOON THROUGH FRIDAY EVENING
     FOR NVZ450-458.

     FIRE WEATHER WATCH FROM SATURDAY MORNING THROUGH SATURDAY
     EVENING FOR NVZ450-453-458-459.

     RED FLAG WARNING UNTIL 9 PM PDT THIS EVENING FOR NVZ450.

CA...FIRE WEATHER WATCH FROM FRIDAY AFTERNOON THROUGH FRIDAY EVENING
     FOR CAZ270-271-272-273-278.

     FIRE WEATHER WATCH FROM SATURDAY MORNING THROUGH SATURDAY
     EVENING FOR CAZ270-271-272-273-278.

&&

HTTP://WEATHER.GOV/RENO