Click for Day 1 FireWX Areal Outline Product
ZCZC SPCFWDDY1 ALL
FNUS21 KWNS 200818
DAY 1 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0318 AM CDT SUN SEP 20 2009
VALID 201200Z - 211200Z
...NO CRITICAL AREAS...
...SYNOPSIS...
AN UPPER TROUGH WILL CONTINUE SEWD ACROSS THE NRN ROCKIES...EMERGING
INTO THE PLAINS BY MON MORNING. A COLD FRONT WILL EXTEND FROM THE
CNTRL DAKOTAS INTO ERN CO BY LATE AFTERNOON...AND STRETCHING WWD
INTO SRN NV. GENERALLY COOL WEATHER WILL EXIST BEHIND THIS
FRONT...WITH STRONG NWLY WINDS ACROSS ID...MT...WY...AND INTO THE
NRN HIGH PLAINS. TEMPERATURES WILL BE COOLER WITH ONLY MARGINALLY
LOW RH THIS AFTERNOON.
A SURFACE HIGH WILL BE CENTERED OVER THE PACIFIC NW AND WILL RESULT
IN DRYING. TO THE S...A VERY DRY AIR MASS WILL REMAIN OVER MUCH OF
CA AS WELL AS SRN NV AND AZ...BUT WINDS WILL BE MOSTLY LIGHT.
OVERNIGHT...E WINDS WILL INCREASE BOTH W OF THE ORE CASCADES...AS
WELL AS ACROSS NRN CA....RESULTING IN POOR RH RECOVERY.
ELSEWHERE...A MILD BUT VERY DRY AIR MASS WILL BE IN PLACE OVER THE
NERN STATES DUE TO A SURFACE HIGH...BUT WINDS WILL BE LIGHT.
...WRN OREGON INTO NRN CA...
HIGH PRESSURE WILL BE CENTERED OVER WA AND OREGON THIS
AFTERNOON...AND WILL SPREAD SEWD IN THE WAKE OF THE UPPER TROUGH. A
SURFACE THERMAL TROUGH WILL DEEPEN OVER INTERIOR CA THIS
AFTERNOON...AND WILL BUILD NWD...EVEN OVERNIGHT...ALONG THE OREGON
COAST. NLY WINDS DURING THE DAYTIME WILL BECOME ELY BY MON
MORNING...BUT RH IS NOT EXPECTED TO BE PARTICULARLY LOW OVERNIGHT
ALTHOUGH AREAS OF GUSTY WINDS WILL DEVELOP.
INTO NRN CA...IT WILL BE WARMER WITH HIGHS IN THE 90S WITH MIN RH
AVERAGING NEAR 20 PERCENT. N TO NE WINDS WILL INCREASE OVERNIGHT AS
A SURFACE TROUGH DEEPENS ALONG THE COAST. THE GUSTY WINDS WILL KEEP
RH RECOVERY POOR IN SPOTS...BUT LEVELS WILL NOT BE EXTREME THROUGH
SUNDAY NIGHT.
...SRN ID...
VERY STRONG NWLY WINDS WILL EXIST BEHIND THE UPPER TROUGH TODAY.
ALTHOUGH TEMPERATURES WILL BE COOLER AND RH LEVELS ONLY MARGINALLY
LOW...STRONG SUSTAINED WLY WINDS OF 20-30 MPH APPEAR LIKELY LATER
TODAY WITH HEATING AND MIXING. GIVEN MARGINAL RH LEVELS IN THE 20
PERCENT RANGE AND A RELATIVELY SHALLOW MIXING LAYER DUE TO COOLER
TEMPERATURES...ONLY A MARGINAL FIRE THREAT IS EXPECTED DUE TO THE
WINDS.
..JEWELL.. 09/20/2009
...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...
Click for Day 2 FireWX Areal Outline Product
ZCZC SPCFWDDY2 ALL
FNUS22 KWNS 200821
DAY 2 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0321 AM CDT SUN SEP 20 2009
VALID 211200Z - 221200Z
...CRITICAL FIRE WEATHER AREA FOR WRN OREGON...NRN CA...
...CRITICAL FIRE WEATHER AREA FOR PORTIONS OF INLAND SRN CA LATE
MONDAY NIGHT...
...SYNOPSIS...
AN UPPER TROUGH WILL CONTINUE TO AMPLIFY AS IT PLUNGES SWD ACROSS
THE CNTRL HIGH PLAINS. A STRONG COLD FRONT AND WIND SHIFT WILL ALSO
BE PRESENT...WITH THE FRONT EXTENDING FROM MN INTO CNTRL OK AND WWD
INTO CNTRL NM AND AZ BY MON AFTERNOON. HIGH PRESSURE BEHIND THIS
FRONT WILL EXTEND NWWD ACROSS THE ROCKIES AND GREAT BASIN. ALONG THE
W COAST...A SURFACE THERMAL TROUGH WILL HUG THE COAST WHILE AN UPPER
RIDGE BUILDS. AN E-W ORIENTED PRESSURE GRADIENT WILL RESULT IN E
WINDS ACROSS THE ORE CASCADES AS WELL AS THROUGH THE COLUMBIA
GORGE...AND INTO NRN CA. VERY LOW RH LEVELS WILL BE ATTAINED...AND
WILL CREATE CRITICAL FIRE CONDITIONS FOR WRN ORE INTO NRN CA.
FARTHER S...GUSTY OFFSHORE FLOW WILL DEVELOP LATE INTO SRN CA...WITH
LOCALLY CRITICAL CONDITIONS ACROSS SOME INLAND VALLEYS LATE MONDAY
NIGHT. GUSTY NLY WINDS AND VERY LOW RH WILL ALSO EXIST OVER SRN NV
INTO WRN AZ WITH A N-S PRESSURE GRADIENT IN PLACE.
...CRITICAL FIRE WEATHER AREA - WRN OREGON...NRN CA...
PRIMARY CONDITIONS: INCREASING E WINDS AND VERY LOW RH...HIGH HAINES
INDEX
GUSTY E WINDS WILL BE ONGOING THROUGH THE COLUMBIA GORGE MON MORNING
AND ACROSS THE W SLOPES OF THE CASCADES WITH COOL TEMPERATURESE
INITIALLY. HOWEVER...STRONG HEATING AND DOWNSLOPE FLOW WILL RESULT
IN VERY LOW RH VALUES ACROSS WRN ORE BY MON AFTERNOON FROM 10-15
PERCENT AS TEMPERATURES RISE INTO THE 80S AND 90S F. GUSTY E WINDS
WILL PERSIST OVERNIGHT WITH POOR RH RECOVERY.
TO THE S...VERY WARM AND DRY WEATHER WILL PREVAIL AS WELL WITH MIN
RH DIPPING INTO THE SINGLE DIGITS LOCALLY. GUSTY ELY WINDS WILL ALSO
EXIST MON MORNING...CONTINUING ALL DAY AND INTO TUE MORNING WITH
EXTREMELY POOR RH RECOVERY.
A HIGH HAINES INDEX WILL ALSO BE PRESENT MON AFTERNOON ACROSS THE
ENTIRE REGION DUE TO THE EXTREME DRY AND WARM CONDITIONS.
...CRITICAL FIRE WEATHER AREA - PORTIONS OF INLAND SRN CA LATE
MONDAY NIGHT...
PRIMARY CONDITIONS: INCREASING OFFSHORE WINDS AND VERY LOW RH
HIGH PRESSURE WILL BUILD INTO THE GREAT BASIN LATE IN THE
PERIOD...RESULTING IN INCREASING OFFSHORE WINDS LATE MONDAY NIGHT
INTO TUE. DURING THE DAY ON MONDAY...IT WILL BE VERY WARM WITH HIGHS
WELL INTO THE 90S F AND MIN RH IN THE LOWER TEENS AND SINGLE DIGITS
WELL INLAND. A MARINE LAYER WILL EXIST ALONG THE COAST AS WELL.
OVERNIGHT...NLY WINDS WILL INCREASE THROUGH PASSES AND CANYONS WITH
LOCAL GUSTS IN EXCESS OF 30 MPH INTO TUE MORNING WITH POOR RH
RECOVERY.
...SRN NV...LOWER CO RIVER VALLEY...
NLY WINDS OF 15-20 MPH WITH HIGHER GUSTS ARE LIKELY OVER SRN NV INTO
NWRN AZ ON MON AS A DRY AIR MASS SPILLS SWD OUT OF THE SURFACE HIGH.
SINGLE DIGIT RH IS LIKELY AS WELL FOR A FEW HOURS OF NEAR CRITICAL
FIRE CONDITIONS.
..JEWELL.. 09/20/2009
...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...