Special Weather Statement, NWS Pocatello, ID

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
217 PM MDT SUN AUG 3 2014

.DISCUSSION...ISOLATED THUNDERSTORMS ALREADY DEVELOPING IN THE
CENTRAL MOUNTAINS THIS AFTERNOON. ALSO KEEPING AND EYE ON A BAND
IN SATELLITE IMAGERY MOVING UP FROM UTAH. THIS BAND COULD TRIGGER
ADDITIONAL THUNDERSTORMS IN THE SOUTH CENTRAL HIGHLANDS AGAIN THIS
AFTERNOON. THE LOW PRESSURE SYSTEM NEAR SAN DIEGO IS ON TRACK WITH
MODEL PROJECTIONS. THE LEADING UPPER LEVEL FRONTAL BAND SHOULD
BEGIN TO MOVE INTO THE SOUTH CENTRAL HIGHLANDS MONDAY MORNING AND
ON TO THE CENTRAL MOUNTAINS BY MID DAY. PRECIPITABLE WATER VALUES
INCREASE TO AROUND 1.25 INCHES MONDAY WITH THE CONTRIBUTION OF
MORE MONSOON MOISTURE. MONDAY THROUGH WEDNESDAY IS SETTING UP TO
BE A PRETTY WET TWO OR THREE DAYS FOR MUCH OF SOUTHEAST IDAHO. A
FLASH FLOOD WATCH HAS BEEN ISSUED FOR THE SAWTOOTH RECREATION
AREA...INCLUDING THE BEAVER CREEK BURN SCAR...AND SMALL STREAMS
AND CREEKS...INCLUDING CAMPING AREAS AND TRAILS AROUND GOOSE
CREEK...OAKLEY RESERVOIR AND MAGIC MOUNTAIN. IT IS A PRETTY GOOD
BET THERE WILL BE EMBEDDED THUNDERSTORMS AT TIMES. FOR THE SOUTH
CENTRAL HIGHLANDS AREA...THE GFS MODEL SUGGESTS CLOSE TO 2 INCHES
OF PRECIPITATION POSSIBLE OVER A 48 HOUR PERIOD. GRANTED SOME
CONVECTIVE FEED BACK IS LIKELY PRESENT IN THE MODEL...BUT THE NAM
MODEL IS NOT FAR OFF FROM THE NUMBERS. THE LAST COUPLE OF MODEL
RUNS...THE LOW LIFTS NORTH TO IDAHO BUT THEN LINGERS OVER THIS
AREA AS A TROUGH INTO POSSIBLY THURSDAY NIGHT OR FRIDAY MORNING.
OTHER MODELS ARE NOT IN DISAGREEMENT. RS

&&

.AVIATION...WITH MONSOON MOISTURE IN PLACE LOOK FOR SCATTERED
MOUNTAIN SHOWERS AND THUNDERSTORMS AND ISOLATED VALLEY SHOWERS AND
THUNDERSTORMS THIS AFTERNOON INTO EARLY EVENING. LOOK FOR VICINITY
THUNDERSTORMS FOR ALL TAF SITES THIS AFTERNOON THROUGH EARLY
EVENING. EXPECT BRIEF HEAVY RAIN AND GUSTY WINDS OF AROUND 50 MPH IN
AND AROUND THUNDERSTORMS. LOOK FOR SHOWERS AND THUNDERSTORMS TO
APPROACH FROM THE SOUTH BY LATE TOMORROW MORNING FOR ALL TAF SITES.
CEILINGS WILL START TO DROP BUT REMAIN VFR TOMORROW. WYATT

&&

.FIRE WEATHER...MONSOON MOISTURE CONTINUES TO PERSIST OVER THE
REGION IN OVERALL HIGH PRESSURE RIDGING EARLY IN THE PERIOD. LOOK
FOR LATE AFTERNOON INTO EARLY EVENING SCATTERED MOUNTAIN SHOWERS AND
THUNDERSTORMS WITH ISOLATED SHOWERS AND THUNDERSTORMS IN THE VALLEYS
TODAY. EXPECT BRIEF HEAVY RAIN AND GUSTY OUTFLOW WINDS IN AROUND AND
THUNDERSTORMS TODAY. LOOK FOR SCATTERED TO NUMEROUS SHOWERS AND
WIDELY SCATTERED TO SCATTERED THUNDERSTORMS ON MONDAY AND TUESDAY AS
AN UPPER LEVEL LOW APPROACHES FROM THE SOUTHWEST. LIGHTNING...HEAVY
RAIN AND GUSTY OUTFLOW WINDS WILL THE BIGGEST IMPACTS.  FLASH
FLOODING PARTICULARLY OVER BURN SCARS IS THE GREATEST AREA OF
IMPACT/CONCERN. A FLASH FLOOD WATCH IS IN EFFECT FOR THE MAJORITY OF
IDAHO FIRE WEATHER ZONES 422 AND 427 AND THE WESTERN PORTION OF ZONE
413. TEMPERATURES WILL DROP BELOW NORMAL AND THE RELATIVE HUMIDITY WILL
RISE ABOVE NORMAL EARLY IN THE WEEK.  WYATT

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
FLASH FLOOD WATCH FROM MONDAY AFTERNOON THROUGH WEDNESDAY
MORNING IDZ022.

FLASH FLOOD WATCH FROM MONDAY AFTERNOON THROUGH WEDNESDAY
MORNING IDZ031.

&&

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO ID
342 PM MDT SUN AUG 3 2014

IDZ020-032-032245-
BUTTE ID-CUSTER ID-
342 PM MDT SUN AUG 3 2014

THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  EXTREME SOUTHEASTERN CUSTER COUNTY IN CENTRAL IDAHO
  CENTRAL BUTTE COUNTY IN EAST CENTRAL IDAHO

UNTIL 445 PM MDT

AT 336 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 7 MILES NORTH OF ARCO..MOVING EAST AT 10 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN.

LOCATIONS IMPACTED INCLUDE...
   HOWE...

LAT...LON 4395 11289 4346 11298 4363 11342 4381 11343
TIME...MOT...LOC 2142Z 267DEG 8KT 4373 11330

DMH