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SRAK48 PACR 011320
ACRRVAAK
AKZALL-302200-
ALASKA SPRING BREAKUP SUMMARY
NWS ALASKA PACIFIC RIVER FORECAST CENTER ANCHORAGE AK
130 PM ADT FRI JUN 1
...SPRING BREAKUP SUMMARY FOR ALASKA...
FLOOD WARNING/WATCHES - NONE
FLOOD POTENTIAL -
THE SPRING BREAKUP FLOOD POTENTIAL IS CURRENTLY RATED AS AVERAGE FOR
THE NORTH SLOPE. BREAKUP IS PROGRESSING ON NORTH SLOPE STREAMS.
WEATHER - TWO MAIN AREAS OF PRECIPITATION WILL INCLUDE SCATTERED
SHOWERS IN THE YUKON VALLEY WITH HEAVIER PRECIPITATION FALLING ON THE
NORTH GULF COAST FOCUSING ON WHITTIER.
FOR MORE INFORMATION ON THE OUTLOOKS FOR THE NEXT 6-10 AND 8-14 DAYS
PLEASE REFER TO THE CLIMATE PREDICTION CENTER WEB SITE AT
HTTP://WWW.CPC.NCEP.NOAA.GOV
RECENT BREAKUP ACTIVITY:
*********************************************************************
*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. *
*********************************************************************
COPPER RIVER..
THE COPPER RIVER IS OPEN TO BELOW CHITINA. THE RIVER IS ALSO
OPEN FROM MILLION DOLLAR BRIDGE DOWNSTREAM.
SUSITNA RIVER..
THE MAINSTEM SUSITNA RIVER IS OPEN.
KUSKOKWIM RIVER...
THE KUSKOKWIM RIVER IS OPEN.
TANANA RIVER..
THE TANANA IS OPEN.
NORTHWEST RIVERS..
THE KOBUK RIVER IS MOSTLY OPEN ON THE UPPER RIVER. THERE IS LIKELY
STILL SOME ICE DOWNSTREAM OF KIANA. THE KOYUKUK RIVER IS OPEN.
YUKON RIVER..
THE YUKON RIVER IS OPEN.
NORTH SLOPE..
THE COLVILLE AT UMIAT HAS BROKEN UP. WATER IS FLOWING IN MOST OF THE
STREAMS ON THE NORTH SLOPE.
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.
* AVERAGE BREAKUP DATES ARE FOR THE PERIOD 1970 THROUGH 2011 AND ARE
CALCULATED FOR LOCATIONS WITH AT LEAST 5 YEARS OF DATA.
** INDICATES ACTUAL BREAKUP DATE
---------------------------------------------------------------------
SNOWMELT FLOOD AVERAGE NO. OF FORECAST
RIVER - REACH RUNOFF POTENTIAL BREAKUP YEARS BREAKUP
VOLUME DATE * RECORD DATE
------------- ---------- --------- ------- ------ --------
SOUTHEAST PANHANDLE ABOVE
KENAI RIVER ABOVE
ANCHOR RIVER ABOVE
ANCHOR POINT 04/13 10
MATANUSKA RIVER ABOVE
GLACIER PARK 04/30 7 4/26**
SUSITNA RIVER ABOVE
GOLD CREEK LOW 05/02 6
SUNSHINE LOW 05/01 21 4/27**
YENTNA RIVER ABOVE
LAKE CREEK LOW 05/01 21 4/30**
SKWENTNA RIVER ABOVE
SKWENTNA LOW 04/30 17 4/29**
COPPER RIVER BASIN ABOVE
GAKONA RVR @ HWY LOW 04/30 25 4/28**
GULKANA RVR @ HWY LOW 04/30 24 4/27**
CHENA RIVER AVERAGE
CHENA LAKES PROJECT LOW
FAIRBANKS LOW 04/26 25 4/23**
TANANA RIVER AVERAGE
NORTHWAY LOW 04/23 26 4/23**
SALCHA LOW
FAIRBANKS LOW 04/29 13 4/25**
NENANA LOW 05/02 38 4/23**
MANLEY LOW 05/03 20 4/26**
KUSKOKWIM RIVER ABOVE
NIKOLAI LOW 04/23 27 4/19**
MCGRATH LOW 05/07 38 4/30**
STONY RIVER LOW 05/06 24 4/30**
SLEETMUTE LOW 05/05 23 4/30**
RED DEVIL LOW 05/06 26 5/05**
CROOKED CREEK LOW 05/07 26 5/06**
ANIAK LOW 05/07 29 5/06**
KALSKAG LOW 05/08 23 5/07**
TULUKSAK LOW 05/09 20 5/13**
AKIAK LOW 05/10 26 5/13**
KWETHLUK LOW 5/14**
BETHEL LOW 05/12 41 5/15**
NAPAKIAK LOW 05/12 18 5/16**
YUKON RIVER (UPPER) ABOVE
DAWSON, YT LOW 05/06 41 5/01**
EAGLE LOW 05/05 32 4/29**
CIRCLE LOW 05/09 30 5/04**
FORT YUKON LOW 05/10 29 5/09**
BEAVER LOW 05/11 17 5/10**
STEVENS VILLAGE LOW 05/12 17 5/10**
RAMPART LOW 05/12 17 5/10**
YUKON RIVER (MIDDLE) ABOVE
TANANA LOW 05/10 27 5/06**
RUBY LOW 05/12 28 5/08**
GALENA LOW 05/12 29 5/11**
KOYUKUK LOW
NULATO LOW 05/12 16 5/09**
KALTAG LOW 05/14 36 5/14**
ANVIK LOW 05/16 25 5/15**
YUKON RIVER (LOWER) ABOVE
HOLY CROSS LOW 05/16 25 5/15**
RUSSIAN MISSION LOW 05/15 27 5/15**
MARSHALL LOW 05/15 21 5/15**
PILOT STATION LOW-MOD 05/17 15 5/17**
MOUNTAIN VILLAGE LOW 05/18 25 5/22**
ALAKANUK/EMMONAK MOD 05/23 27 5/25**
KOYUKUK RIVER ABOVE
BETTLES LOW 05/10 30 5/10**
ALLAKAKET LOW 05/10 25 5/12**
HUGHES LOW 05/11 24 5/12**
SEWARD PENINSULA ABOVE
BUCKLAND RIVER ABOVE
BUCKLAND MOD 05/18 21 5/22**
KOBUK RIVER ABOVE
KOBUK LOW 05/16 32 5/20**
SHUNGNAK LOW 05/18 22 5/19**
AMBLER LOW 05/18 29 5/23**
NOATAK RIVER ABOVE
NOATAK LOW 05/20 17 ~5/20**
BROOKS RANGE - NORTH AVERAGE
COLVILLE @ UMIAT LOW 05/24 12 5/23**
COLVILLE @ COLVILLE LOW 06/01 15 5/28-6/04
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 THIS YEAR.
$$
CVB
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