999 
FXUS65 KBOI 062023
AFDBOI
SOUTHWEST IDAHO/SOUTHEAST OREGON AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE IDAHO
222 PM MDT FRI MAY 06 1999

PACIFIC COLD FRONT STILL OFFSHORE NW COAST 19Z BUT WILL REACH COAST
BY 21Z.  FRONT AND UPPER TROUGH BECOMING NEGATIVE TILTED AND SLOWING 
DOWN.  12Z PROGS BRING IT EWD TO OREGON/IDAHO BORDER ABOUT 10Z 
SATURDAY BUT COULD DELAY TIL 12Z...WITH SCATTERED SHOWERS CONTINUING 
IN IDAHO ZONES TIL 16Z.  THUNDERSTORM POTENTIAL MINIMAL IN OUR CWA 
AS FROPA OCCURS IN EARLY MORNING HOURS.  ON SAPIX THE FRONT AT 19Z WAS 
NARROW BUT WELL DEFINED ESPECIALLY IN LOW CLOUDS.  NARROW STRIP OF 
HIGH CLOUDS ENHANCED DOWN THE FRONT TO 39N.  AVN AND ETA LOOK TOO 
DRY THAT FAR SOUTH.  NARROWNESS OF THE FRONT WILL KEEP SHOWERS BRIEF 
IN OUR CWA BUT THEY SHOULD OCCUR FAR ENOUGH SOUTH TO MEASURE IN MOST 
OF SERN OREGON LATE TONIGHT.  SHOWERS WILL RETREAT NORTH IN IDAHO 
FRIDAY MORNING LEAVING MAGIC VALLEY AND SOUTHERNMOST IDAHO ZONES 
DRY.  BREEZY AND MUCH COOLER FRIDAY IN POST-FRONTAL AIR MASS WITH 
MODERATE NW-SE SURFACE PRESSURE GRADIENT.  WEAK SECONDARY IMPULSE 
DROPS SEWD INTO ERN OREGON FRIDAY NIGHT THEN RETREATS NEWD INTO 
CENTRAL IDAHO EARLY SATURDAY MORNING.  CONTINUED BREEZY AND COOL 
SATURDAY UNDER MAIN PART OF UPPER TROUGH.

3-5 DAY...CLEARING AND WARMING AS UPPER TROUGH EXITS EAST AND ERN 
PACIFIC RIDGE BUILDS WHILE MOVING INLAND.  80 DEGREES POSSIBLE IN 
VALLEYS LATTER HALF OF NEXT WEEK.  STILL LOTS OF HIGH-LEVEL SNOW TO 
MELT AND RUN OFF THOUGH.  L COLIN

..THE FOLLOWING TEMPERATURES AND POPS ARE UNOFFICIAL AND FOR 
COORDINATION PURPOSES ONLY...

BKE  036/053/027/052 7131
TWF  042/063/035/058 1201

.BOI...NONE.