Flash Flood Warning 26, NWS Boise, ID

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
302 PM MDT FRI AUG 22 2014

.SHORT TERM...TONIGHT THROUGH SUNDAY...UPPER LEVEL LOW CENTERED
OVER NE OREGON WILL DIG ACROSS SW IDAHO DUE TO A 100-130KT JET
STREAM LEVEL SPEED MAX ON ITS W FLANK OVER OREGON. STRONG MID
LEVELS WINDS THERE ARE BRINGING WIND GUSTS TO AROUND 25 MPH ACROSS
BAKER COUNTY. AS THE LOW SHIFTS OVER SW IDAHO EXPECT 15-25 MPH NW
WINDS ACROSS SE OREGON AS WELL AS THE WEST END OF THE TREASURE
VALLEY AND PARTS OF THE UPPER WEISER BASIN. THIS WIND PATTERN WILL
SETTLE OVER THE AREA AGAIN FOR SATURDAY AFTERNOON FOR A FALL-LIKE
DAY.

THUNDERSTORMS TONIGHT WILL CONTINUE TO BRING HEAVY RAIN AND LOCAL
FLASH FLOOD POTENTIAL MAINLY ACROSS THE CENTRAL IDAHO ZONES WHILE
FASTER STORM MOVEMENT...SHEAR TO 30 KTS AND 500-100 J/KG
BOUYANCY ACROSS THE SRN ZONES CONTINUE A HAIL...HEAVY RAIN AND
STRONG WIND GUST THREAT. FLASH FLOOD WATCH CONTINUES ACROSS
CENTRAL IDAHO THROUGH 6Z MIDNIGHT MDT.

COOL NW FLOW SATURDAY NIGHT AND SUNDAY WILL BE ACCOMPANIED BY A
LITTLE MOISTURE ACROSS MAINLY THE WEST CENTRAL MOUNTAINS AND
LITTLE CHANGE IN THE MODELS RESULTED IN LITTLE CHANGE IN THE
FORECAST THEN EITHER.

.LONG TERM...SUNDAY NIGHT THROUGH WEDNESDAY...BROAD UPPER LEVEL
RIDGE OFF THE PACIFIC NORTHWEST COAST WILL PROVIDE NORTHWESTERLY
FLOW THROUGH WEDNESDAY. EXPECT DIURNAL SHOWERS AND THUNDERSTORMS
MAINLY OVER THE HIGHER TERRAIN MONDAY AND TUESDAY BEFORE DRIER AIR
MOVES IN BY WEDNESDAY. EXPECT BELOW NORMAL TEMPERATURES TO WARM TO
NEAR NORMAL BY WEDNESDAY.

WEDNESDAY NIGHT THROUGH FRIDAY...THE WARMING TREND WILL COME TO A
HALT AS THE UPPER-LEVEL RIDGE GETS ERODED OUT OF OUR AREA BY
FRIDAY. LOWER TEMPERATURES WILL ENSUE BRINGING OUR AREA BACK INTO
NORMAL TEMPERATURES RANGES FOR THIS TIME OF YEAR.

&&

.AVIATION...VFR. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS MAINLY
NORTH AND EAST OF A LINE FROM KBNO-KONO-KEUL-KREO. LIGHT SURFACE
WINDS BECOMING GENERALLY NORTHWESTERLY THIS AFTERNOON 5 TO 15
KT...EXCEPT VARIABLE WINDS AND GUSTS UP TO 50KT IN VICINITY OF
THUNDERSTORMS. WINDS ALOFT AT 10K FEET MSL...SW 10-20KT BECOMING
NORTHERLY 5-15KT BY 03Z SAT.

&&

.BOI WATCHES/WARNINGS/ADVISORIES...
ID...FLASH FLOOD WATCH UNTIL MIDNIGHT MDT TONIGHT IDZ011-013-028.
OR...NONE.

&&

WEATHER.GOV/BOISE

SHORT TERM...VM
LONG TERM....KA/AB
AVIATION.....KA

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SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BOISE ID
219 PM MDT FRI AUG 22 2014

IDZ015-030-222045-
SOUTHERN TWIN  FALLS COUNTY ID-SOUTHWEST HIGHLANDS ID-
219 PM MDT FRI AUG 22 2014

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN OWYHEE AND WEST CENTRAL
TWIN FALLS COUNTIES UNTIL 245 PM MDT...

AT 219 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 26
MILES WEST OF ROGERSON...OR 27 MILES NORTHWEST OF JACKPOT...MOVING
NORTHEAST AT 20 MPH.

HALF INCH HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS
STORM.

THIS STRONG THUNDERSTORM WILL BE NEAR...
  BLACK BUTTE AROUND 230 PM MDT.
  ROSEWORTH AND CEDAR CREEK RESERVOIR AROUND 240 PM MDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

WHEN SAFE TO DO SO...PLEASE RELAY STORM REPORTS TO THE NATIONAL
WEATHER SERVICE IN BOISE IDAHO VIA LOCAL LAW ENFORCEMENT...OR NWS
BOISE FACEBOOK AND TWITTER ACCOUNTS.

&&

LAT...LON 4223 11526 4248 11496 4227 11473 4209 11511
TIME...MOT...LOC 2019Z 230DEG 19KT 4221 11512

KA

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BOISE ID
227 PM MDT FRI AUG 22 2014

IDZ013-222100-
BOISE MOUNTAINS ID-
227 PM MDT FRI AUG 22 2014

...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL ELMORE COUNTY UNTIL
300 PM MDT...

AT 227 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER
ANDERSON DAM...OR 19 MILES NORTHEAST OF MOUNTAIN HOME...MOVING
NORTHEAST AT 15 MPH.

NICKEL SIZE HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH
THIS STORM.

THIS STRONG THUNDERSTORM WILL BE NEAR...
  ANDERSON DAM AROUND 230 PM MDT.
  LITTLE CAMAS RESERVOIR AROUND 240 PM MDT.
  ANDERSON RANCH RESERVOIR AROUND 250 PM MDT.
  PINE AROUND 300 PM MDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

WHEN SAFE TO DO SO...PLEASE RELAY STORM REPORTS TO THE NATIONAL
WEATHER SERVICE IN BOISE IDAHO VIA LOCAL LAW ENFORCEMENT...OR NWS
BOISE FACEBOOK AND TWITTER ACCOUNTS.

&&

LAT...LON 4330 11552 4339 11564 4360 11539 4343 11519
TIME...MOT...LOC 2027Z 229DEG 12KT 4337 11548

KA

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BOISE ID
250 PM MDT FRI AUG 22 2014

IDZ016-030-222115-
SOUTHERN TWIN  FALLS COUNTY ID-WESTERN MAGIC VALLEY ID-
250 PM MDT FRI AUG 22 2014

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN OWYHEE AND WEST CENTRAL
TWIN FALLS COUNTIES UNTIL 315 PM MDT...

AT 250 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 18
MILES WEST OF ROGERSON...OR 26 MILES NORTHWEST OF JACKPOT...MOVING
NORTHEAST AT 15 MPH.

NICKEL SIZE HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH
THIS STORM.

THIS STRONG THUNDERSTORM WILL BE NEAR...
  ROSEWORTH AROUND 300 PM MDT.
  CASTLEFORD AROUND 310 PM MDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

WHEN SAFE TO DO SO...PLEASE RELAY STORM REPORTS TO THE NATIONAL
WEATHER SERVICE IN BOISE IDAHO VIA LOCAL LAW ENFORCEMENT...OR NWS
BOISE FACEBOOK AND TWITTER ACCOUNTS.

&&

LAT...LON 4229 11504 4237 11504 4254 11485 4233 11462
      4219 11493
TIME...MOT...LOC 2050Z 229DEG 11KT 4231 11494

KA