Click for Day 1 FireWX Areal Outline Product
ZCZC SPCFWDDY1 ALL
FNUS21 KWNS 010647
DAY 1 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0147 AM CDT SUN MAY 01 2011
VALID 011200Z - 021200Z
...SYNOPSIS...
AMPLIFIED LARGE-SCALE TROUGH WILL SLOWLY SHIFT EWD TOWARDS THE ROCKY
MTN STATES TODAY. STRONG NLY DEEP-LAYER FLOW WILL PERSIST IN ITS
WAKE OVER THE GREAT BASIN AND INTO THE LOWER CO RIVER
VALLEY...REINFORCING AN INVETERATE DRY AIR MASS. MEANWHILE...A SFC
COLD FRONT WILL MOVE SWD ACROSS TX AND WWD INTO THE DESERT SOUTHWEST
LATE IN THE PERIOD...WITH AN EXPANSIVE AREA OF SFC HIGH PRESSURE
COVERING THE PACIFIC NW EXTENDING INTO THE SRN PLAINS.
...LOWER CO RIVER VALLEY...
DEEP-LAYER NLY FLOW WILL PERSIST THROUGH THE LOWER CO RIVER
VALLEY...IN THE WAKE OF AN UPPER TROUGH POSITIONED TO THE E.
MODERATELY STRONG FLOW IN THE 1-3 KM LAYER /SAMPLED AT 20 KTS BY
KYUX VWP EARLY THIS MORNING/ WILL MIX TOWARDS THE SFC BY LATE
MORNING. AS A RESULT...SUSTAINED WIND SPEEDS OF 15-20 MPH WILL
DEVELOP AND PERSIST INTO THE EVENING. THE PRESENCE OF A VERY DRY AIR
MASS /CHARACTERIZED BY SINGLE DIGIT TO SUBZERO DEW POINTS/ WILL
YIELD SINGLE DIGIT RH VALUES THROUGH MUCH OF THE DAY...SUPPORTING AN
ELEVATED FIRE WEATHER THREAT.
...SERN AZ...SWRN NM...
SFC COLD FRONT WILL STALL NEAR THE RIO GRANDE VALLEY TODAY. TO THE W
OF THIS FEATURE...WLY SFC WINDS WILL INCREASE TO 15-20 MPH BY LATE
MORNING IN RESPONSE TO A CONSTRICTING PRESSURE GRADIENT AND DEEP
BOUNDARY LAYER MIXING . DESPITE SFC TEMPERATURES BEING SEASONABLY
COOL /60S-70S/...A PLUME OF VERY DRY AIR CURRENTLY POSITIONED OVER
THE REGION WILL SUPPORT RH VALUES FALLING INTO THE LOW-MID SINGLE
DIGITS THIS AFTERNOON. WITH ONGOING EXTREME DROUGHT CONDITIONS...AN
ELEVATED FIRE WEATHER THREAT WILL LIKELY MATERIALIZE AND PERSIST
INTO THE LATE AFTERNOON/EARLY EVENING. LATER IN THE PERIOD...THE
COLD FRONT WILL ACCELERATE TOWARDS THE W...WITH COOLER/HIGHER RH AIR
OVERSPREADING THE AREA IN ITS WAKE.
..ROGERS.. 05/01/2011
...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...