Fire Weather Outlook Discussion
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000
FNUS22 KWNS 041600
FWDDY2

DAY 2 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1059 AM CDT SAT JUL 04 2015

VALID 051200Z - 061200Z

NO CHANGES TO PREVIOUS FORECAST.  FOR MORE INFORMATION...REFER TO
DISCUSSION BELOW.

..COOK.. 07/04/2015

.PREV DISCUSSION... /ISSUED 0454 AM CDT SAT JUL 04 2015/

...SYNOPSIS...
HIGH-OVER-LOW BLOCK ACROSS THE EASTERN PACIFIC OCEAN WILL CONTINUE
THROUGH THE FORECAST PERIOD. ACROSS WESTERN NORTH AMERICA...THE
TROUGH-OVER-RIDGE PATTERN WILL WEAKEN AS THE NORTHERN TROUGH MOVES
EAST AND THE SUB-TROPICAL RIDGE DE-AMPLIFIES SLIGHTLY.

FARTHER EAST...REMNANT FRONT ACROSS THE SOUTHERN/EASTERN UNITED
STATES WILL ONCE AGAIN SUPPORT SHOWERS/THUNDERSTORMS. ADDITIONAL
SHOWERS/THUNDERSTORMS WILL BE POSSIBLE ACROSS THE NORTHERN PLAINS AS
A SURFACE FRONT ASSOCIATED WITH THE AFOREMENTIONED CANADIAN
MID-LEVEL TROUGH BEGINS TO MOVE SOUTH/EAST.

...NORTH-CENTRAL OREGON NORTHWARD INTO CENTRAL AND EASTERN
WASHINGTON...
MID-LEVEL WINDS WILL VEER FROM WEST-TO-NORTH AND SURFACE WINDS WILL
VEER FROM WEST-TO-NORTHEAST IN RESPONSE TO THE AFOREMENTIONED
WESTERN CANADIAN TROUGH MOVING EAST AND THE SUB-TROPICAL RIDGE
DE-AMPLIFYING. DESPITE THE WEAKENING DOWNSLOPE FLOW THROUGH THE
FORECAST PERIOD...STRONG/GUSTY SURFACE WINDS WILL REMAIN POSSIBLE AS
THE SURFACE-PRESSURE GRADIENT REORIENTS ITSELF IN RESPONSE TO A
SURFACE-HIGH PRESSURE BUILDING INTO WESTERN MONTANA AND THE THERMAL
TROUGH SHIFTING INTO EASTERN IDAHO. WITH AFTERNOON RELATIVE-HUMIDITY
VALUES EXPECTED TO FALL INTO THE TEENS TO LOW 20S
PERCENT...ELEVATED-TO-LOCALLY CRITICAL FIRE-WEATHER CONDITIONS WILL
ONCE AGAIN BE POSSIBLE DESPITE A SHIFT IN WIND DIRECTION.

...GREAT BASIN...SIERRA MOUNTAINS...NORTHERN CALIFORNIA...AND
SOUTHERN OREGON...
ANOTHER DAY OF SHOWERS/THUNDERSTORMS WILL BE POSSIBLE AS MID-LEVEL
MOISTURE REMAINS ACROSS THIS AREA. PRECIPITABLE-WATER VALUES REMAIN
AROUND ONE INCH OR GREATER...WHICH WOULD SUPPORT WETTING RAINS
WITHIN THUNDERSTORM CORES. HOWEVER...AS IS THE CASE ON
DAY-1/SATURDAY...DESPITE LOCALIZED WETTING RAIN
POTENTIAL...RECEPTIVE FUELS ACROSS THE AREA WILL RESULT IN THE
POTENTIAL FOR NEW LIGHTNING-INDUCED FIRES...ESPECIALLY OUTSIDE OF
THUNDERSTORM CORES.

...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...




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