Area Forecast Discussion
Issued by NWS Boise, ID

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000
FXUS65 KBOI 041004
AFDBOI

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
404 AM MDT SAT JUL 4 2015

.SHORT TERM...TODAY THROUGH SUNDAY...SHOWERS AND THUNDERSTORMS
RE-FIRE ALONG THE NV BORDER THIS AFTERNOON. FORCING FOR THIS
DEVELOPMENT WILL AGAIN BE AFTERNOON HEATING AND INSTABILITY. AS
DEEPER MOISTURE IS DRAWN NORTHWARD SHOWER/STORM DEVELOPMENT WILL
FOLLOW FOR THIS EVENING SO WILL NEED TO KEEP WATCH FOR OUTFLOW
WINDS ENTERING THE SNAKE VALLEY SHOULD STORMS APPROACH THE
SOUTHERN EDGE. TEMPERATURES ARE 1-3 DEGREES COOLER THAN YESTERDAY
AS THE UPPER RIDGE GIVES UP GROUND TO AN APPROACHING TROUGH. FOR
TONIGHT...A WEAK DISTURBANCE TRACKING NORTH OUT OF THE GREAT BASIN
INTO SE IDAHO WILL KEEP A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS ALONG THE ID/NV BORDER...OTHERWISE THE REGION
REMAINS DRY. ON SUNDAY AN UPPER TROUGH TRACKS EASTWARD ALONG THE
U.S-CANADIAN BORDER. PASSAGE OF TROUGH WILL DRAW MOISTURE INTO THE
CENTRAL ID MTNS AND INCREASE INSTABILITY SUNDAY AFTERNOON. THIS
WILL INTRODUCE A SLIGHT CHANCE OF SHOWERS AND STORMS ACROSS THE
WESTERN MAGIC VALLEY AND CENTRAL IDAHO MTNS WHILE KEEPING A CHANCE
OF SHOWERS/STORMS ALONG THE OR/NV AND ID/NV BORDER. WITH COOLING
ALOFT AND AN INCREASE IN CLOUD COVER TEMPERATURES COOL 4-8 DEGREES
FROM TODAY/S HIGHS.

.LONG TERM...SUNDAY NIGHT THROUGH SATURDAY...OUR REGION WILL BE
ON THE INTERFACE BETWEEN AN UPPER LEVEL TROUGH DIGGING INTO THE
UPPER MIDWEST AND MONSOONAL MOISTURE IN THE GREAT BASIN. AFTERNOON
SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE MAINLY IN SOUTHERN
ZONES WITH THE MONSOONAL MOISTURE IN PLACE THROUGH THURSDAY. A
TROUGH OFF THE CALIFORNIA COAST WILL SLOWLY MOVE INLAND THURSDAY
AND MOVE ACROSS THE FORECAST AREA SOMETIME SATURDAY. EXPECT
INCREASED CHANCES OF PRECIPITATION AS THIS SYSTEM MOVES ACROSS
THE AREA. A LONGWAVE TROUGH DEVELOPS OFF THE WEST COAST BRINGING
RELATIVELY COOLER AIR UNDER SOUTHWEST FLOW ALOFT BEYOND SATURDAY.
TEMPERATURES WILL GRADUALLY COOL TO AROUND NORMAL BY FRIDAY AND
SLIGHTLY BELOW NORMAL ON SATURDAY.

&&

.AVIATION...VFR. SURFACE WINDS...MAINLY WESTERLY 5-10KT SATURDAY
AFTERNOON. WINDS ALOFT...WNW 10-20KT UP THROUGH 10K FT MSL.

WEEKEND OUTLOOK...ISOLATED AFTERNOON AND EVENING THUNDERSTORMS
SATURDAY AND SUNDAY MAINLY SOUTH OF THE SNAKE RIVER VALLEY IN IDAHO
AND THE SOUTHERN HALF OF HARNEY AND MALHEUR COUNTIES IN OREGON.

&&

.BOI WATCHES/WARNINGS/ADVISORIES...
ID...NONE.
OR...NONE.

&&

$$

WEATHER.GOV/BOISE

SHORT TERM...DG
LONG TERM....KA
AVIATION.....KA



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