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StormReady Program


SRAK48 PACR 261611 ACRRVAAK  AKZALL-292200-

ALASKA SPRING BREAKUP SUMMARY 
NWS ALASKA PACIFIC RIVER FORECAST CENTER ANCHORAGE AK 
400 PM ADT MAY 26 2016

...SPRING BREAKUP SUMMARY FOR ALASKA....

FLOOD WARNING/WATCHES: NONE

...HIGH WATER REMAINS ON THE COLVILLE RIVER DELTA...

HIGH WATER LEVELS AND BANKFULL CONDITIONS ALONG THE COLVILLE RIVER DELTA
WILL GRADUALLY DIMINISH THROUGH THE WEEKEND. 

FOR WEATHER... ICE AND SNOW CONDITIONS... PLEASE REFER TO
HTTP://WWW.APRFC.ARH.NOAA.GOV/FCST.PHP?PRODUCT=AGAK78PACR AND FOR VARIOUS SNOW
GRAPH OPTIONS... REFER TO THE APRFC WEB SITE AT HTTP://APRFC.ARH.NOAA.GOV OR
THE NRCS WEB SITE AT HTTP://WWW.AK.NRCS.USDA.GOV/SNOW/DATA/CURRENT.HTML

RECENT BREAKUP ACTIVITY ACROSS THE STATE-

*********************************************************************
*EVEN THOUGH A PARTICULAR RIVER OR REACH MAY BE DESCRIBED AS MOSTLY *
*OPEN OR OPEN... IT IS STILL POSSIBLE FOR RUNS OF ICE AND DEBRIS TO *
*MOVE THROUGH AS HEADWATERS UPSTREAM BREAKUP.  PLEASE USE CAUTION AT*
*ALL TIMES WHEN ATTEMPTING TO NAVIGATE RIVERS.                      *
*********************************************************************

SUSITNA RIVER...
THE SUSITNA RIVER IS OPEN.

SKWENTNA AND YENTNA RIVER..
THE YENTNA AND SKWENTNA RIVERS ARE OPEN. 

TANANA RIVER..
THE TANANA RIVER IS OPEN. 

COPPER RIVER... 
THE COPPER RIVER IS OPEN.

KUSKOKWIM...
THE KUSKOKWIM RIVER IS OPEN.

YUKON RIVER...
THE YUKON RIVER IS OPEN.

KOYUKUK RIVER...
THE KOYUKUK RIVER IS OPEN.

KOBUK RIVER...
THE KOBUK RIVER IS OPEN.

NOATAK RIVER...
THE NOATAK RIVER IS OPEN.

SAGAVANIRKTOK (SAG) RIVER...
THE SAG RIVER IS OPEN AT SOME LOCATIONS.

COLVILLE RIVER...
THE COLVILLE RIVER IS OPEN AT MOST LOCATIONS.  

THE FOLLOWING TABLE GIVES AN ESTIMATION OF FLOOD POTENTIAL FOR
VARIOUS LOCATIONS AROUND THE STATE AND BASIN RUNOFF VOLUMES.
---------------------------------------------------------------------
SNOWMELT RUNOFF VOLUME...EXPECTED WATER VOLUME FROM SNOWMELT DURING
                         THE MELT SEASON.

FLOOD POTENTIAL...THE LIKELIHOOD OF FLOODING FROM SNOWMELT AND/OR
                  ICE JAMS.  THIS IS INITIALLY CALCULATED BASED ON THE FLOOD 
                  FREQUENCY FOR THE 2000 TO 2015 HISTORICAL RECORD AND ADJUSTED
                  TO REFLECT CURRENT CONDITIONS. 

*  AVERAGE BREAKUP DATES ARE FOR THE PERIOD 1980 THROUGH 2015 AND ARE
      CALCULATED FOR LOCATIONS WITH AT LEAST 5 YEARS OF DATA.
** ACTUAL BREAKUP DATE FOR THIS YEAR
---------------------------------------------------------------------

                      SNOWMELT   FLOOD      AVERAGE  NO. OF  FORECAST
RIVER - REACH         RUNOFF     POTENTIAL  BREAKUP  YEARS   BREAKUP
                      VOLUME                DATE *    USED    DATE
-------------         ---------- ---------  -------  ------  --------
SOUTHEAST PANHANDLE     

KENAI RIVER              

ANCHOR RIVER          AVERAGE    NONE        04/14     11     3/18**

MATANUSKA RIVER       AVERAGE                04/30              
SUSITNA RIVER                     LOW                    
  GOLD CREEK                      LOW        05/03      8     
  SUNSHINE                        LOW        05/03     27     4/16**  

YENTNA RIVER          AVERAGE          
  LAKE CREEK                      LOW        05/01     25     4/14**  

SKWENTNA RIVER        AVERAGE      
  SKWENTNA                        LOW        05/01     21     4/13**   

COPPER RIVER BASIN    BELOW                   
  GAKONA RVR @ HWY                LOW        05/02     29     4/21**  
  GULKANA   @ HWY                 LOW        05/01     28     4/20**  

CHENA RIVER           AVERAGE             
  CHENA LAKES PROJECT                
  FAIRBANKS                       LOW        04/26     24     4/22**

TANANA RIVER          BELOW  
  CHISANA @ NORTHWAY              LOW        04/26     26     4/11**  
  SALCHA                          LOW                          
  FAIRBANKS                       LOW        05/01     17     4/18**  
  NENANA                          LOW        05/02     36     4/23** 
  MANLEY                          LOW        05/04     26     4/28**  

KUSKOKWIM RIVER       AVERAGE      
  NIKOLAI                         LOW        04/24     30     4/11** 
  MCGRATH                         LOW        05/07     36     4/25**   
  STONY RIVER                     LOW        05/06     28     4/23**  
  SLEETMUTE                       LOW        05/07     27     4/18**   
  RED DEVIL                       LOW        05/06     30     4/19**  
  CROOKED CREEK                   LOW        05/07     30     4/21**   
  ANIAK                           LOW        05/08     33     4/19**   
  KALSKAG                         LOW        05/08     27     4/20**  
  TULUKSAK                        LOW        05/10     24     4/21**  
  AKIAK                           LOW        05/11     30     4/21**   
  KWETHLUK                        LOW   
  BETHEL                          LOW        05/12     35     4/20**  
  NAPAKIAK                        LOW        05/13     21     4/20**   

YUKON RIVER (UPPER)   AVERAGE    
  DAWSON, YT                                 05/05     36     4/23**
  EAGLE                           LOW        05/05     35     4/26**  
  CIRCLE                          LOW        05/10     32     4/29**
  FORT YUKON                      LOW        05/11     32     5/01**
  BEAVER                          LOW        05/11     20     5/02**  
  STEVENS VILLAGE                 LOW        05/12     19     5/03**
  RAMPART                         LOW        05/12     21     5/03**   

YUKON RIVER (MIDDLE)  AVERAGE  
  TANANA                          LOW        05/10     31     4/29**
  RUBY                            LOW        05/12     30     5/03**   
  GALENA                          LOW        05/13     35     5/02**  
  KOYUKUK                         LOW        05/13     11     5/04**      
  NULATO                          LOW        05/13     20     5/04**  
  KALTAG                          LOW        05/14     30     5/01**   
  ANVIK                           LOW        05/17     29     5/04** 
  
YUKON RIVER (LOWER)   AVERAGE 
  HOLY CROSS                      LOW        05/16     29     4/26**
  RUSSIAN MISSION                 LOW        05/16     30     4/25**
  MARSHALL                        LOW        05/16     24     4/25**
  PILOT STATION                   LOW        05/17     19     4/29**
  MOUNTAIN VILLAGE                LOW        05/18     29     4/28**   
  ALAKANUK/EMMONAK                LOW        05/22     31     5/03**   

KOYUKUK RIVER         BELOW  
  BETTLES                         LOW        05/10     34     4/30**
  ALLAKAKET                       LOW        05/10     30     5/01**
  HUGHES                          LOW        05/11     29     4/30**   

SEWARD PENINSULA                   
  BUCKLAND                      LOW-MOD      05/18     26     5/09**

KOBUK RIVER                                       
  KOBUK                         LOW-MOD      05/16     32    05/04**  
  SHUNGNAK                        LOW        05/18     26    05/04**   
  AMBLER                          LOW        05/19     32    05/03**   

NOATAK RIVER          AVERAGE 
  NOATAK                          LOW        05/20     21    05/05**   

BROOKS RANGE - NORTH  AVERAGE
  COLVILLE @ UMIAT                LOW        05/23     17    05/12**  
  COLVILLE @ COLVILLE           LOW-MOD      06/01     19    05/18**

SAGAVANIRKTOK RIVER
  DALTON HWY                   MOD-HIGH      


FOR MORE DETAIL AND TO SEE A FLOOD POTENTIAL MAP REFER TO OUR WEB 
SITE AT HTTP://APRFC.ARH.NOAA.GOV.  

THIS IS THE LAST BREAKUP SUMMARY FOR 2016. THE NEXT SPRING BREAKUP 
OUTLOOK WILL BE RELEASED IN MARCH OF 2017...WITH A DETAILED OUTLOOK
IN EARLY TO MID APRIL. THE BREAKUP SUMMARY WILL BEGIN AGAIN WHEN BREAKUP
ACTIVITY BEGINS IN 2016.

$$
BCJ


         

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Alaska-Pacific River Forecast Center
6930 Sand Lake Road
Anchorage, Ak 99502
907-266-5160

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