River Flood Warning 2, NWS Boise, ID

737 
WGUS85 KBOI 161849
FLSBOI
FLOOD STATEMENT
NATIONAL WEATHER SERVICE BOISE ID
1249 PM MDT FRI MAR 16 2012

...THE FLOOD WARNING CONTINUES FOR THE FOLLOWING RIVERS IN IDAHO...
 
  WEISER RIVER NEAR WEISER AFFECTING WASHINGTON COUNTY. 

.RUNOFF FROM RAIN AND SNOWMELT WILL CAUSE THE WEISER RIVER NEAR
WEISER TO RISE ABOVE FLOOD STAGE. AS OF NOON FRIDAY...UP TO TWO AND
A HALF INCHES OF RAIN HAS FALLEN ACROSS PORTIONS OF THE WEISER RIVER
BASIN THE PAST 48 HOURS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PERSONS WITH INTERESTS NEAR THE RIVER SHOULD CONTINUE TO TAKE ACTION
TO PROTECT PROPERTY.

&&

IDC087-171249-
/O.EXT.KBOI.FL.W.0002.000000T0000Z-120318T0043Z/
/WSRI1.1.RS.120316T1818Z.120317T0000Z.120317T1843Z.NO/
1249 PM MDT FRI MAR 16 2012

...FLOOD WARNING EXTENDED UNTIL SATURDAY EVENING...THE FLOOD WARNING 
CONTINUES FOR
  THE WEISER RIVER NEAR WEISER.
* UNTIL SATURDAY EVENING...OR UNTIL THE WARNING IS CANCELLED.
* AT 12:01 PM FRIDAY THE STAGE WAS 9.5 FEET. 
* MINOR FLOODING IS FORECAST.
* FLOOD STAGE IS 9.5 FEET.
* FORECAST...THE RIVER WILL RISE TO NEAR 9.9 FEET BY FRIDAY EVENING.        
  THE RIVER WILL FALL BELOW FLOOD STAGE SATURDAY AFTERNOON.
* IMPACT...AT 10.0 FEET...WATER WILL BEGIN BACKING UP UNDER THE COVE 
  ROAD BRIDGE INTO THE SLOUGH AND ADJACENT FARM FIELDS.

$$

081 
WGUS85 KBOI 162237
FLSBOI
FLOOD STATEMENT
NATIONAL WEATHER SERVICE BOISE ID
437 PM MDT FRI MAR 16 2012

...THE FLOOD WARNING IS CANCELLED FOR THE FOLLOWING RIVERS IN 
IDAHO...
 
  WEISER RIVER NEAR WEISER AFFECTING WASHINGTON COUNTY.

.THE WEISER RIVER NEAR WEISER IS NO LONGER EXPECTED TO REACH FLOOD
STAGE...THEREFORE THE WARNING HAS BEEN CANCELLED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PERSONS WITH INTERESTS NEAR THESE FLOODED RIVERS SHOULD CONTINUE TO 
TAKE ACTION TO PROTECT PROPERTY.

&&

IDC087-162307-
/O.CAN.KBOI.FL.W.0002.000000T0000Z-120318T0043Z/
/WSRI1.N.RS.120316T1818Z.000000T0000Z.000000T0000Z.NO/
437 PM MDT FRI MAR 16 2012

THE FLOOD WARNING IS CANCELLED FOR
  THE WEISER RIVER NEAR WEISER.
* AT  4:15 PM FRIDAY THE STAGE WAS 9.3 FEET. 
* FLOOD STAGE IS 9.5 FEET.
* FORECAST...THE RIVER CRESTED BELOW FLOOD STAGE.  THE 
  RIVER WILL CONTINUE TO FALL TO 8.9 FEET BY TOMORROW MORNING.
* IMPACT...AT 9.5 FEET...MINOR FLOODING OF FIELDS NEAR WEISER IS 
  POSSIBLE.

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
840 PM MDT THU MAR 15 2012

.DISCUSSION....NO UPDATES EXPECTED. BAND OF PRECIPITATION ALREADY
MOVING INTO SOUTHEAST OREGON AND THE WEST CENTRAL MOUNTAINS AND WILL
CONTINUE TO MOVE SLOWLY EAST DURING THE NIGHT. AREAS OF MODERATE TO
HEAVE PRECIPITATION STILL ON TRACK AS THIS SYSTEM MOVES EAST. SEE
HYDROLOGY DISCUSSION FOR MORE DETAIL ON RISING RIVERS. WILL
CONTINUE TO MONITOR RIVERS THROUGH THE NIGHT BUT DO NOT EXPECT ANY
CHANGE AT THIS TIME TO THE FLOOD WATCH.

&&

.AVIATION...WIDESPREAD RAIN THROUGH FRIDAY MORNING WITH SNOW LEVEL
AVERAGING 6000 FT MSL AND DECREASING FROM THE WEST THROUGHOUT THE
DAY. RAIN WILL BE HEAVY AT TIMES AND NEARLY CONSTANT IN THE CENTRAL
MOUNTAINS/NORTHERN AREAS.

VISIBILITIES...MVFR WITH LOCAL IFR IN PERIODS OF HEAVY RAIN IN THE
CENTRAL MOUNTAINS. ELSEWHERE...VFR WITH AREAS OF MVFR IN SHOWERS.
MOUNTAINS WILL BE OBSCURED. SURFACE WINDS....SOUTHERLY UP TO 15 KTS.
WINDS ALOFT...SOUTHWESTERLY UP TO 50 KTS AT 10K FT MSL.

&&

.PREV DISCUSSION...
SHORT TERM...MILD WET WEATHER TO CONTINUE THROUGH EARLY SATURDAY
THEN SIGNIFICANT COOLING. SOME DETAILS HAVE CHANGED FROM PREVIOUS
FORECASTS. ON SATELLITE WE SEE A SLIGHTLY DRIER BAND COMING IN FROM
ERN OREGON THIS AFTERNOON AND EVENING. BUT THAT SAME AREA WILL ALSO
BECOME UNSTABLE THIS AFTERNOON AND WE HAVE INCLUDED A SLIGHT CHANCE
OF THUNDERSTORMS UNTIL SUNSET FROM BAKER COUNTY SEWD TO THE OWYHEES.
THE MAIN FRONTAL BAND WITH MODERATE TO HEAVY PCPN WILL COME IN AFTER
MIDNIGHT IN ERN OREGON AND PRE-DAWN THROUGH NOON IN WRN IDAHO. THIS
TIMING IS A FEW HOURS LATER THAN PREVIOUS FORECASTS. SNOW LEVEL
TONIGHT WILL BE ABOVE 6500 FEET EVEN IN THE NRN MOUNTAINS...LOWERING
TO ONLY 5000 TO 6000 FEET SATURDAY...WHICH IS NOT AS LOW AS
PREVIOUSLY FORECAST. SNOW LEVEL WILL STAY THERE THROUGH EARLY
SATURDAY MORNING THEN LOWER AGAIN LATER SATURDAY BEHIND ANOTHER COLD
FRONT. COLDER AND MUCH DRIER AIR LIES BEHIND THE SECOND COLD FRONT.
AS FOR PCPN...FOR THE PERIOD TONIGHT THROUGH NOON FRIDAY THE LARGEST
AMOUNTS WILL BE EXTEND FROM THE WALLOWAS IN NERN BAKER COUNTY EWD
ACROSS THE UPPER WEISER BASIN THROUGH THE WEST CENTRAL IDAHO
MOUNTAINS AND BOISE MOUNTAINS. LESSER AMOUNTS WILL FALL TO THE SOUTH
AND WEST...ONLY ABOUT .10 INCH NEAR THE NEVADA BORDER. SEE HYDROLOGY
SEGMENT BELOW FOR INFORMATION ABOUT PCPN... SNOW LEVEL...AND FLOOD
WATCHES NOW IN EFFECT.

LONG TERM...SATURDAY NIGHT THROUGH THURSDAY...FRONTAL PASSAGE
SATURDAY WILL USHER IN MUCH COOLER AIR AND DECREASING CHANCES OF
PRECIPITATION...FOR BELOW NORMAL TEMPERATURES WITH A CHANCE OF SNOW
SHOWERS THROUGH TUESDAY. CLEARING AND DRIER ON WEDNESDAY AS AN UPPER
RIDGE ATTEMPTS TO BUILD OVER THE WEST...IN RESPONSE TO A DEEPENING
LOW IN THE GULF OF ALASKA AND ITS ASSOCIATED TROUGH. THE EVENTUAL
EVOLUTION OF THIS SYSTEM IS THE BIG QUESTION FOR THE EXTENDED
FORECAST. IT CURRENTLY APPEARS THAT THE TROUGH WILL BEGIN TO PUSH
TOWARD THE PAC NW ON THURSDAY...FOR INCREASING CHANCES OF
PRECIPITATION...BEFORE POSSIBLY CUTTING OFF AND SLIDING SOUTH DOWN
THE WEST COAST. HOWEVER...UNCERTAINTY IS HIGH...THEREFORE HAVE
TRENDED THE FAR EXTENDED FORECAST TOWARD CLIMATOLOGY.

.HYDROLOGY...RAIN AND RISING SNOW LEVELS ARE CAUSING SHARP RISES ON
MANY SMALLER WATERWAYS IN THE WEST CENTRAL AND BOISE MOUNTAINS.
UPPER PORTIONS OF THE PAYETTE RIVER SHOWING A PRETTY GOOD RESPONSE
TO THE RUNOFF AS WELL. SMALLER TRIBUTARY CREEKS AND STREAMS ALONG
WITH THE WEISER RIVER CONTINUE TO BE THE MAIN CONCERN. SPOTTER
REPORTS INDICATE THAT THE UPPER WEISER BASIN RECEIVED OVER AN INCH
OF RAIN IN THE 36 HOURS ENDING AT NOON MDT TODAY. THE LACK OF
SNOWPACK ACROSS THE LOWER END OF THE WEISER BASIN DOES HELP EASE THE
FLOOD THREAT A LITTLE...BUT STILL EXPECTING A SUBSTANTIAL AMOUNT OF
MELT ACROSS THE UPPER END OF THE BASIN SO WE DECIDED TO GO AHEAD
WITH A FLOOD WATCH FOR THE WEISER RIVER NEAR WEISER. HEAVIEST
RAINFALL STILL EXPECTED LATE TONIGHT INTO FRIDAY MORNING WITH
AMOUNTS RANGING FROM .40 TO 1.00 INCH FROM THE WALLOWA MOUNTAINS IN
BAKER COUNTY SOUTHEAST ACROSS THE WEST CENTRAL AND BOISE MOUNTAINS.
SNOW LEVELS AROUND 6000 TO 7000 TONIGHT IN THESE AREAS...LOWERING TO
AROUND 4500 TO 5500 FEET FRIDAY. LOWER SNOW LEVELS WILL EASE THE
RUNOFF FRIDAY BUT EXPECT TO SEE SMALLER CREEKS AND STREAMS AS WELL
AS THE WEISER RIVER CREST DURING THE DAY FRIDAY INTO FRIDAY EVENING.
MUD AND ROCK SLIDES MAY BECOME AN ISSUE AS WELL.

&&

.BOI WATCHES/WARNINGS/ADVISORIES...
ID...FLOOD WATCH THROUGH FRIDAY AFTERNOON IDZ011-013-033.
OR...FLOOD WATCH THROUGH FRIDAY AFTERNOON ORZ062.
&&

WEATHER.GOV/BOISE

DISCUSSION........JA
AVIATION..........CB
HYDROLOGY.........TAL
PREV SHORT TERM...LC
PREV LONG TERM....BB/DD

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BOISE ID
520 AM MDT THU MAR 15 2012

IDZ011-013-028-ORZ062-161130-
WEST CENTRAL MOUNTAINS-BOISE MOUNTAINS-CAMAS PRAIRIE-BAKER COUNTY-
520 AM MDT THU MAR 15 2012 /420 AM PDT THU MAR 15 2012/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST
IDAHO...WEST CENTRAL IDAHO AND NORTHEAST OREGON.

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. MODERATE RAIN AT
TIMES TONIGHT WILL COMBINE WITH WARM TEMPERATURES TO INCREASE
RUNOFF INTO AREA CREEKS AND MAIN STEM RIVER SYSTEMS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. A COLD FRONT WILL
BRING A ROUND OF MODERATE SNOW FRIDAY ABOVE 3500 FEET FOLLOWED BY
COLDER AND UNSETTLED CONDITIONS THIS WEEKEND.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

IDZ012-014>016-029-030-033-ORZ061-063-064-161130-
LOWER TREASURE VALLEY ID-UPPER TREASURE VALLEY-
SOUTHWEST HIGHLANDS-WESTERN MAGIC VALLEY-OWYHEE MOUNTAINS-
SOUTHERN TWIN FALLS COUNTY-UPPER WEISER RIVER-HARNEY COUNTY-
MALHEUR COUNTY-LOWER TREASURE VALLEY OR-
520 AM MDT THU MAR 15 2012 /420 AM PDT THU MAR 15 2012/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL
IDAHO...SOUTHWEST IDAHO...WEST CENTRAL IDAHO AND SOUTHEAST
OREGON.

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. GUSTY EAST TO
SOUTHWEST WINDS WILL BE ASSOCIATED WITH NUMEROUS RAIN SHOWERS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. A COLD FRONT WILL
CROSS THE AREA EARLY FRIDAY MORNING WITH A LIGHT DUSTING OF SNOW
POSSIBLE ABOVE 3500 FEET...INCLUDING BURNS AND BAKER CITY OREGON.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.