720
FXUS65 KBOI 190243
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
843 PM MDT WED SEP 18 2019
DISCUSSION
SCATTERED SHOWERS CONTINUE THROUGHOUT OUR CWA
THIS EVENING. ISOLATED THUNDERSTORMS ALSO IN EASTERN OREGON
CLOSER TO THE UPPER LOW CENTERED OVER THE CASCADES. SHOWERS
SHOULD INCREASE ON THE IDAHO SIDE LATER TONIGHT AND THURSDAY
AS THE LOW MOVES INTO OUR CWA. CLEARING WEST TO EAST THURSDAY
NIGHT AND FRIDAY MORNING AS THE LOW EXITS EAST. CONTINUED COOL.
CURRENT FORECAST IS ON TRACK. NO UPDATES.
AVIATION
SCATTERED SHOWERS ACROSS HIGHER ELEVATIONS
DISSIPATING THIS EVENING WITH SHOWERS PERSISTING OVER THE MAGIC
VALLEY THROUGH THE MORNING. PERIODS OF MVFR/IFR OVERNIGHT IN LOW
CEILINGS AND LOCALIZED FOG. MOUNTAINS OBSCURED. SNOW LEVEL: 7500-
8500 FT MSL. SURFACE WINDS: GENERALLY W TO NW 10 KTS OR LESS. WINDS
ALOFT TO 10K FEET MSL: SOUTHWEST 10-20 KT BECOMING VARIABLE 5-10 KT
BY 19/09Z.
PREV DISCUSSION
SHORT TERM...TONIGHT THROUGH FRIDAY...WIDESPREAD RAIN AND
ISOLATED THUNDERSTORMS WILL CONTINUE ACROSS MUCH OF THE REGION
THIS EVENING. SOME OF THE STRONGER CELLS HAVE PRODUCED BRIEF HEAVY
RAIN. SOME SPOTS IN THE MOUNTAINS COULD SEE NEAR AN INCH OF RAIN
TOTAL THOUGH MOST AREAS WILL SEE ABOUT 0.25 TO 0.50 INCHES THROUGH
THURSDAY. AS THE LOW MOVES OVER THE FORECAST AREA LATE TONIGHT,
ANOTHER PRECIPITATION BAND DEVELOPS OVER THE BOISE MOUNTAINS AND
WESTERN MAGIC VALLEY BRINGING PERIODS OF MODERATE RAINFALL. THE
BAND LIFTS NORTHEAST THURSDAY MORNING WITH MORE CONVECTIVE SHOWERS
AND THUNDERSTORMS DEVELOPING THURSDAY AFTERNOON. THE BEST CHANCE
FOR PRECIPITATION WILL BE ALONG THE NEVADA BORDER AND IN THE WEST
CENTRAL AND BOISE MOUNTAINS. DRY CONDITIONS FOLLOW FOR FRIDAY
UNDER COOL NORTHWESTERLY FLOW. TEMPERATURES WILL REMAIN WELL BELOW
NORMAL THROUGH THE PERIOD.
LONG TERM...FRIDAY NIGHT THROUGH MONDAY...A WEAK RIDGE WILL MOVE
ACROSS THE REGION ON SATURDAY BRINGING MOSTLY SUNNY SKIES AND
SEASONABLE TEMPERATURES. ANOTHER TROUGH, VERY SIMILAR TO TODAY'S
WILL MOVE ACROSS THE REGION ON SUNDAY NIGHT. EXPECT SHOWERS
SUNDAY NIGHT INTO MONDAY. CONDITIONS WILL CLEAR OUT ON MONDAY
AFTERNOON. TEMPERATURES WILL BE COOL AS THE SYSTEM MOVES THROUGH
BUT QUICKLY REBOUND AS CONDITIONS DRY OUT.
MONDAY NIGHT THROUGH WEDNESDAY...CLEAR TO PARTLY CLOUDY SKIES ACROSS
MOST OF THE REGION AS DRIER, MORE STABLE RIDGING MOVES IN AND
DOMINATES. LOOK FOR BREEZIER NORTHWEST WINDS UNTIL TUESDAY NIGHT,
BECOMING LIGHTER AND SWITCHING TO WESTERLY AFTERWARDS. EXPECT
HIGHS AND LOWS TO REGISTER NEAR THE NORMAL RANGES.
BOI WATCHES/WARNINGS/ADVISORIES
ID...NONE.
OR...NONE.
WWW.WEATHER.GOV/BOISE
WWW.FACEBOOK.COM/NWSBOISE
WWW.TWITTER.COM/NWSBOISE
DISCUSSION...LC
AVIATION.....AL
PREV SHORT TERM...JDS
PREV LONG TERM....KA/WH
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