143
FXUS65 KBOI 231553
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
ISSUED BY NATIONAL WEATHER SERVICE POCATELLO ID
953 AM MDT WED APR 23 2025
DISCUSSION
SATELLITE SHOWING MID TO HIGH LEVEL CLOUDS ACROSS
THE FORECAST AREA THIS MORNING INDICATING MOISTURE HAS
INCREASED. EXPECT SHOWERS TO DEVELOP THIS AFTERNOON OVER THE
HIGHER TERRAIN NEAR THE NEVADA BORDER WHEN SURFACE HEATING
PEAKS. OVERALL, INSTABILITY REMAINS LIMITED BUT THERE COULD BE
ENOUGH MOISTURE AND TERRAIN FORCING FOR A FEW LIGHTNING STRIKES
ALONG THE BORDER. SHOWER AND THUNDERSTORMS CHANCES INCREASE
THURSDAY AND FRIDAY AS THE NEXT UPPER LEVEL LOW REACHES THE
REGION. FRIDAY LOOKS PARTICULARLY FAVORABLE FOR THUNDERSTORMS
ALONG WITH MEASURE PRECIPITATION. CURRENT FORECAST LOOKS GOOD SO
NO UPDATES AT THIS TIME.
AVIATION
VFR WITH MID/HIGH LEVEL CLOUDS. SLIGHT CHANCE (10-20%)
OF SHOWERS AND THUNDERSTORMS THIS AFTERNOON NEAR THE NV BORDER AND
ACROSS THE CENTRAL ID MOUNTAINS. SURFACE WINDS: NW-NE 5-15 KT. WINDS
ALOFT AT 10KFT: VARIABLE 5-15 KT
KBOI... VFR. SURFACE WINDS W-NW 5-10 KT, WITH GUSTS UP TO 18 KT THIS
AFTERNOON.
PREV DISCUSSION
SHORT TERM...TODAY THROUGH FRIDAY NIGHT... INCREASING MID-LEVEL
CLOUDS OVERNIGHT INTO THE MORNING AS MOISTURE STREAMS IN WITH
SOUTH-WESTERLY FLOW ALOFT AHEAD OF AN INCOMING SHORTWAVE.
CHANCES OF SHOWERS (15-30%) OVER HIGHER TERRAIN AS THIS
SHORTWAVE ENTERS OUR AREA. OTHERWISE DRY IN LOWER ELEVATIONS
WEDNESDAY. PRECIPITATION CHANCES INCREASE TO 30-60% IN THE
WEST-CENTRAL MOUNTAINS AND SOUTHWEST HIGHLANDS THURSDAY, AS THE
SHORTWAVE TROUGH EXITS OUR AREA TO THE EAST. BRIEF RIDGING WILL BUILD
IN OVER OUR AREA KEEPING THURSDAY NIGHT/FRIDAY MORNING DRY.
PRECIPITATION MAKES IT'S WAY BACK INTO OUR AREA FRIDAY
AFTERNOON, AS A CLOSED LOW MAKES IT'S WAY INTO THE GREAT BASIN
BRINGING MOIST SOUTHERLY FLOW. THE ENS STANDARDIZED ANOMALY IS
FLAGGING ANOMALOUSLY HIGH PRECIPITABLE WATER FRIDAY AFTERNOON.
PRECIPITATION CHANCES RANGE FROM 30-60% AREA WIDE WITH THE
HIGHER VALUES SEEN IN HIGHER ELEVATIONS. THERE REMAINS ENOUGH
INSTABILITY TO SUPPORT A SLIGHT CHANCE (20%) OF THUNDERSTORMS
OVER THE SOUTHWESTERN HIGHLANDS, WEST-CENTRAL MOUNTAINS, AND
OVER THE WESTERN MAGIC VALLEY. TEMPERATURES LEAN ABOVE NORMAL
WEDNESDAY THROUGH FRIDAY.
LONG TERM...SATURDAY THROUGH WEDNESDAY...AN UPPER LEVEL LOW
WILL MOVE WEST TO EAST ACROSS NORTHERN NV SATURDAY INTO SUNDAY,
AND AN ACCOMPANYING COLD FRONT WILL MOVE THROUGH OUR AREA. IN
ADDITION, SHOWERS WILL SPREAD INTO EASTERN OR SATURDAY, AND
INTO SW ID SUNDAY. SNOW LEVELS WILL BE FAIRLY HIGH, RANGING FROM
7500 TO 8500 FT AGL SATURDAY, AND ONLY FALLING TO 6000 TO 7500
SUNDAY. RIDGING WILL BUILD IN BEHIND THE DEPARTING TROUGH MONDAY
AND LAST INTO TUESDAY, BRINGING DRY CONDITIONS. TEMPERATURES
ARE EXPECTED TO BE 5 TO 10 DEGREES ABOVE NORMAL SATURDAY,
FALLING TO JUST A COUPLE DEGREES ABOVE NORMAL SUNDAY. ADDITIONAL
COOL AIR WILL MOVE INTO THE REGION MONDAY, RESULTING IN HIGHS
AROUND 5 DEGREES BELOW NORMAL. WARMING TUESDAY SHOULD TAKE
READINGS RIGHT BACK UP TO NEAR NORMAL.
BOI WATCHES/WARNINGS/ADVISORIES
ID...NONE.
OR...NONE.
WWW.WEATHER.GOV/BOISE
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSBOISE
WWW.X.COM/NWSBOISE
DISCUSSION...JDS
AVIATION.....ST
SHORT TERM...NF
LONG TERM....SP
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