Area Forecast Discussion
Issued by NWS Boise, ID

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FXUS65 KBOI 270939
AFDBOI

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
339 AM MDT WED MAY 27 2015

.SHORT TERM...TODAY THROUGH THURSDAY...AN UPPER LEVEL LOW PRESSURE
SYSTEM WAS ENHANCING THE CONVECTION OVERNIGHT WITH ISOLATED
SHOWERS AND THUNDERSTORMS CONTINUING OVER SW IDAHO. THE CONVECTION
IS EXPECTED TO REMAIN OVER SW IDAHO THROUGH THIS MORNING. THE
CENTER OF UPPER LOW WILL SLOWLY MOVE TO THE SOUTHEAST THROUGH THE
IDAHO PANHANDLE TODAY. SHOWERS AND THUNDERSTORMS WILL EXPAND
ACROSS THE AREA THIS AFTERNOON /ENHANCED BY DAYTIME HEATING/ WITH
THE BULK OF THE CONVECTION EXPECTED IN SW IDAHO. ISOLATED STRONG
THUNDERSTORMS CAPABLE OF PRODUCING GUSTY WINDS...SMALL HAIL...AND
HEAVY RAIN ARE POSSIBLE. THE SHOWERS AND THUNDERSTORMS WILL
CONTINUE THROUGH THIS EVENING THEN DIMINISH OVERNIGHT. THE UPPER
LOW WILL MOVE INTO EASTERN IDAHO TONIGHT AND WESTERN WYOMING ON
THURSDAY. DRIER AIR WILL MOVE INTO MOST OF THE AREA BY THURSDAY
AFTERNOON WHILE RESIDUAL MOISTURE WILL BRING A CHANCE OF SHOWERS
AND THUNDERSTORMS TO THE HIGHER TERRAIN OF SW IDAHO. HIGH
TEMPERATURES /NEAR NORMAL/ TODAY WILL BE SIMILAR TO
YESTERDAY...WITH SLIGHTLY WARMER TEMPERATURES EXPECTED ON
THURSDAY.

.LONG TERM...THURSDAY NIGHT THROUGH WEDNESDAY...UPPER LEVEL
RIDGING WILL MOVE INTO THE REGION BRINGING WARMER AIR ALOFT.
SHOWERS AND THUNDERSTORMS WILL STILL POSSIBLE OVER THE CENTRAL
IDAHO MOUNTAINS FRIDAY AND SATURDAY. TEMPERATURES WILL RISE INTO
THE LOWER 90S IN VALLEY LOCATIONS...AROUND 10-15 DEGREES ABOVE
NORMAL FOR SATURDAY AND SUNDAY. BY LATE SUNDAY...A VIGOROUS UPPER
LEVEL TROUGH MOVES INLAND OFF THE OREGON COAST WITH A STRONG COLD
FRONT EXPECTED TO BRING SHOWERS AND THUNDERSTORMS. UPPER LEVEL
DYNAMICS COULD BE FAVORABLE TO SUPPORT STRONG THUNDERSTORMS SUNDAY
AFTERNOON INTO MONDAY. BY TUESDAY THE UPPER LEVEL TROUGH MOVES
OVERHEAD AND TEMPERATURES WILL FALL TO AROUND 5 DEGREES BELOW
NORMAL WITH INCREASED CHANCES OF SHOWERS AND AFTERNOON
THUNDERSTORMS ACROSS THE ENTIRE AREA.

&&

.AVIATION...VFR. ISOLATED SHOWERS AND THUNDERSTORMS OVERNIGHT.
SHOWERS AND THUNDERSTORMS WILL INCREASE IN COVERAGE AFTER 18Z/WED.
THUNDERSTORMS MAY PRODUCE GUSTY WINDS IN EXCESS OF 35 KTS...HEAVY
RAIN AND SMALL HAIL. SURFACE WINDS VARIABLE 12KT OR
LESS...BECOMING NW 5-15KT AFTER 18Z/WED. WINDS ALOFT NEAR 10K FT
MSL...NW 10-20KT.

&&

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

&&

$$

WEATHER.GOV/BOISE

SHORT TERM...BW
LONG TERM....KA
AVIATION.....KA


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