338
FXUS65 KBOI 152021
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
221 PM MDT MON JUL 15 2019
SHORT TERM...TONIGHT THROUGH THURSDAY
MOIST, UNSTABLE AIR WILL ALLOW DEVELOPMENT OF SHOWERS AND
THUNDERSTORMS AGAIN TONIGHT MAINLY IN NORTHERN AREAS, MUCH
LIKE LAST NIGHT. WITH RELATIVELY STRONG MID-LEVEL SOUTHWEST
WINDS ALOFT SOME STORMS WILL BECOME STRONG WITH HEAVY RAIN,
HAIL, AND GUSTY OUTFLOW WINDS TO 50 MPH. THIS IS MOST
LIKELY IN BAKER COUNTY/OR AND VALLEY COUNTY/ID THIS EVENING,
THEN IN VALLEY COUNTY LATER TONIGHT. THE UPPER TROUGH WILL
PASS THROUGH ON TUESDAY AND THUNDERSTORMS WILL AGAIN DEVELOP
IN THE AFTERNOON IN THE CENTRAL IDAHO MOUNTAINS, BUT OREGON
WILL STAY MOSTLY CLEAR AS THE AIR MASS STABILIZES THERE. BY
TUESDAY NIGHT STABILIZATION WILL REACH IDAHO. NO MORE
THUNDERSTORMS ARE EXPECTED ANYWHERE IN OUR CWA TUESDAY NIGHT
THROUGH THURSDAY. THE UPPER TROUGH WILL BRING IN COOLER AIR
WITH TEMPS AROUND 5 DEGREES BELOW NORMAL THROUGH THURSDAY.
THE TROUGH WILL BE REINFORCED FROM THE WEST WEDNESDAY AND
LINGER OVER OUR AREA INTO THURSDAY. WEST-NORTHWESTERLY FLOW
ALOFT WILL BE DRIER. SKIES WILL BE CLEAR IN SOUTHERN AREAS
AND MOSTLY CLEAR IN THE NORTH. WINDS WILL BE WEST OR NORTHWEST
10-15 MPH.
LONG TERM...THURSDAY NIGHT THROUGH MONDAY
THE DRY
NORTHWESTERLY FLOW ALOFT WILL SHIFT TO THE SOUTHWEST BY MONDAY
AS THE UPPER LEVEL TROUGH AXIS PUSHES EASTWARD AND A STRONG RIDGE
OF HIGH PRESSURE BEGINS BUILDING IN THE MIDWEST. MODELS ARE
STARTING TO SHOW SOME HINTS OF MONSOONAL MOISTURE MAKING ITS WAY
INTO THE REGION BY MID NEXT WEEK. TEMPERATURES WILL STAY CLOSE
TO NORMAL FOR THE START OF THE WEEKEND THEN SLOWLY CLIMB TO A
FEW DEGREES ABOVE NORMAL BY MONDAY.
AVIATION
VFR. ISOLATED SHOWERS AND THUNDERSTORMS DEVELOPING
THIS AFTERNOON IN SE OREGON WITH A SLIGHT CHANCE IN SW IDAHO.
SURFACE WINDS, WEST-NORTHWEST 10-15KTS WITH AFTERNOON GUSTS
20-25KTS. GUSTS IN AND AROUND THUNDERSTORMS OF 35-40KTS. WINDS
ALOFT TO 10K FEET MSL, SOUTHWEST 15-20KTS.
BOI WATCHES/WARNINGS/ADVISORIES
ID...NONE.
OR...NONE.
WWW.WEATHER.GOV/BOISE
WWW.FACEBOOK.COM/NWSBOISE
WWW.TWITTER.COM/NWSBOISE
SHORT TERM...LC
LONG TERM....JC
AVIATION.....JC
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