Click for Day 1 FireWX Areal Outline Product
ZCZC SPCFWDDY1 ALL
FNUS21 KWNS 280832
DAY 1 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0332 AM CDT WED OCT 28 2009
VALID 281200Z - 291200Z
...CRITICAL FIRE WEATHER AREA FOR SRN CA COASTAL RANGE INVOF LOS
ANGELES BASIN SWD...
...CRITICAL FIRE WEATHER AREA FOR PORTIONS OF S-CNTRL/SERN AZ...
...SYNOPSIS...
HIGHLY-AMPLIFIED MID/UPPER-LEVEL TROUGH CENTERED OVER THE ERN GREAT
BASIN/SOUTHWEST WILL GRADUALLY PROGRESS EWD REACHING THE CNTRL/SRN
ROCKIES BY EARLY THU. AN INTENSE MID-LEVEL JET WILL BE MAINTAINED
ALONG THE PERIPHERY OF THE TROUGH AXIS ARCING FROM CA TO NRN MEXICO
TO THE CNTRL/SRN HIGH PLAINS. A POWERFUL COLD FRONT WILL SWEEP
ACROSS THE SRN ROCKIES ONTO THE SRN HIGH PLAINS BY THIS AFTERNOON. A
SURFACE ANTICYCLONE WILL DEVELOP OVER THE PACIFIC NW AND SHIFT INTO
THE NRN/CNTRL GREAT BASIN.
...CRITICAL FIRE WEATHER AREA - SRN CA COASTAL RANGE INVOF LOS
ANGELES BASIN SWD...
PRIMARY CONDITIONS: MODERATE OFFSHORE FLOW / LOW RH / SEVERE DROUGHT
RECENT MESONET OBSERVATIONS CONFIRM AREAS OF SUSTAINED SURFACE WINDS
FROM 15 TO 25 MPH JUXTAPOSED WITH RH VALUES OF 10 TO 20
PERCENT...E/SE OF THE LOS ANGELES BASIN ALONG ADJACENT SLOPES OF THE
COASTAL MTNS. THIS WILL LIKELY EXPAND SWD TOWARDS THE MEXICAN BORDER
THIS MORNING. BY THIS AFTERNOON...PERSISTENT DRYING OF THE AIR MASS
ALONG WITH DIURNAL HEATING WILL LEAD TO WIDESPREAD LOW RH OF 6 TO 12
PERCENT. OFFSHORE FLOW WILL BE SLIGHTLY WEAKER WED EVENING/OVERNIGHT
AS LOW/MID-LEVEL FLOW GRADUALLY SUBSIDES...HOWEVER RH RECOVERY
SHOULD REMAIN POOR.
...CRITICAL FIRE WEATHER AREA - PORTIONS OF S-CNTRL/SERN AZ...
PRIMARY CONDITIONS: STRONG WINDS / LOW RH / SEVERE DROUGHT
AFTERNOON TEMPERATURES SHOULD BE AROUND 25 DEGREES COOLER COMPARED
TO TUE /GENERALLY IN THE 50S AT LOWER TO MID-ELEVATIONS/ IN THE WAKE
OF A SHARP COLD FRONT PASSAGE. EVEN SO...LARGE-SCALE SUBSIDENCE AND
DRYING WILL RESULT IN SURFACE DEW POINTS DROPPING INTO THE SINGLE
DIGITS. RH VALUES WILL FALL TO BETWEEN 8 AND 15 PERCENT DURING
MID-LATE AFTERNOON. MODEL FORECASTS ARE CONSISTENT IN DEPICTING
WEAKENING OF INTENSE LOW/MID-LEVEL FLOW DURING THE DAY. HOWEVER...A
DEEP MIXED BOUNDARY LAYER WILL SUPPORT SUSTAINED SURFACE WLYS LIKELY
REACHING 25 TO 30 MPH.
..GRAMS.. 10/28/2009
...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...
Click for Day 2 FireWX Areal Outline Product
ZCZC SPCFWDDY2 ALL
FNUS22 KWNS 280938
DAY 2 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0438 AM CDT WED OCT 28 2009
VALID 291200Z - 301200Z
...NO CRITICAL AREAS...
...SYNOPSIS...
VIGOROUS UPPER-LEVEL TROUGH ACROSS THE CNTRL/SRN ROCKIES WILL
BIFURCATE WITH A SHORT WAVE EVOLVING NEWD TOWARDS THE UPPER MIDWEST
AND A SECONDARY WAVE ANCHORING IN THE BASE OF THE TROUGH OVER THE
SRN ROCKIES. IN ITS WAKE...RIDGING WILL BUILD ACROSS THE PACIFIC
NW/NRN CA.
...SRN CA COASTAL AREA...
WEAK TO MODERATE OFFSHORE FLOW SHOULD BE ONGOING 12Z/THU IN ADJACENT
SLOPES TO THE COASTAL MTNS. ALTHOUGH CONSENSUS OF MODEL FORECASTS
SUGGESTS THE SURFACE PRESSURE GRADIENT WILL BE WEAKER COMPARED TO
DAY 1...30 TO 40 MPH N/NELY WINDS AT 700 MB WILL CONTINUE TO SUPPORT
LOCALLY GUSTY SURFACE WINDS THROUGH THE PERIOD IN FAVORED
CANYONS/PASSES. SINGLE-DIGIT RH VALUES SHOULD BECOME INCREASINGLY
COMMON THU AFTERNOON...WITH LONG DURATIONS OF RH VALUES AOB 15
PERCENT APPEARING PROBABLE GIVEN POOR RECOVERY AT NIGHT.
..GRAMS.. 10/28/2009
...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...