Fire Weather Outlook Discussion
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000
FNUS22 KWNS 031548
FWDDY2

DAY 2 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1048 AM CDT FRI JUL 03 2015

VALID 041200Z - 051200Z

NO CHANGES NEEDED.  FOR MORE INFORMATION...PLEASE SEE PREVIOUS
DISCUSSION BELOW.

..COOK.. 07/03/2015

.PREV DISCUSSION... /ISSUED 0437 AM CDT FRI JUL 03 2015/

...SYNOPSIS...
HIGH-OVER-LOW MID-/UPPER-LEVEL PATTERN WILL DEVELOP ACROSS THE
EASTERN PACIFIC OCEAN WITH A DOWNSTREAM TROUGH-OVER-RIDGE LOCATED
ACROSS WESTERN NORTH AMERICA. FARTHER DOWNSTREAM /ACROSS EASTERN
NORTH AMERICA/ MEAN TROUGHING WILL PERSIST. GENERALLY HOT/DRY
CONDITIONS WILL PERSIST ACROSS MUCH OF THE WEST...WITH COOLER/WETTER
CONDITIONS FOUND ACROSS AREAS EAST OF THE ROCKIES.

...CENTRAL OREGON NORTHWARD INTO CENTRAL WASHINGTON...
SIMILAR CONDITIONS AS DAY-1/FRIDAY WILL CONTINUE THROUGH SATURDAY.
STRONG HEATING WILL RESULT IN THE DEVELOPMENT OF A
DEEPLY-MIXED-BOUNDARY LAYER AND MINIMUM RELATIVE-HUMIDITY VALUES IN
THE TEENS-TO-MID 20S PERCENT RANGE. A SHORT-WAVE TROUGH EMBEDDED IN
THE LARGER WESTERN CANADIAN TROUGH ACROSS ALBERTA WILL REINFORCE THE
LEE TROUGH EAST OF THE CASCADES ALLOWING FOR STRONG SURFACE WINDS TO
DEVELOP. ONE CAVEAT IS THE DEGREE TO WHICH CLOUD COVER /ASSOCIATED
WITH THE APPROACHING SHORT-WAVE TROUGH OR LEFT OVER FROM
DAY-1/FRIDAY CONVECTIVE ELEMENTS/ MAY LIMIT OVERALL HEATING AND KEEP
RELATIVE-HUMIDITY VALUES HIGHER THAN DAY-1/FRIDAY. EITHER
WAY...GIVEN THE PREEXISTING HOT/DRY CONDITIONS ACROSS THE
AREA...ELEVATED-T0-LOCALLY CRITICAL FIRE-WEATHER CONDITIONS WILL BE
POSSIBLE.

...GREAT BASIN...SIERRA MOUNTAINS...AND FAR SOUTHERN OREGON...
ONCE AGAIN THUNDERSTORMS WILL BE POSSIBLE IN THIS REGION AS
VORTICITY MAXIMA CONTINUE TO ROTATE AROUND THE PERIPHERY OF THE
WESTERN RIDGE. PRECIPITABLE-WATER VALUES AROUND OR GREATER THAN ONE
INCH WILL SUPPORT WET THUNDERSTORMS...ALTHOUGH LIGHTNING STRIKES
OUTSIDE OF THUNDERSTORM CORES WILL STILL POSE A RISK FOR FIRE
STARTS. ADDITIONALLY...THE DRY...DEEPLY-MIXED-BOUNDARY LAYER WILL
POSE A DOWNBURST THREAT WITH THE STRONGEST STORMS. PLEASE SEE THE
LATEST SPC DAY-2 CONVECTIVE OUTLOOK FOR ADDITIONALLY INFORMATION
REGARDING THUNDERSTORM POTENTIAL IN THIS AREA.

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




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