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Western U.S. Streamflow Forecasts

Currently, streamflow forecasts are made near the beginning of each month using the Variable Infiltration Capacity hydrologic model, applied for daily simulation of western U.S. hydrology at 1/8 degree grid resolution. The daily ensemble outputs of these simulations are summarized as monthly hydrograph distribution plots (accessed from the map(s) below), and as summer runoff period anomalies, or "Seasonal Volume Forecasts", where the summer runoff period is either April-September or April-July, for the various forecast types (e.g., ESP, CPC, climate model-based).

Tabular forecast summaries and links to model output are also provided below. For more information on the methods used, see the description on the Research page.

Seasonal Volume Forecasts

The clickable map below summarizes the current ESP/CPC volume forecasts for the streamflow simulation locations that are currently active. Clicking on a point launches a window showing the monthly streamflow hydrograph distributions for each type of forecast (e.g., ESP, CPC). Below the hydrographs, the prior evolution of selected basin-averaged hydrometeorological variables is also shown. Tabular results for all volume forecasts are available from links at the bottom of the page.

Summer Streamflow: ESP CPC           Next 6 months Streamflow: ESP CPC


Scale

Station ID

Station Name

Ensemble Median % of Average

Ensemble Median % of Median

Ensemble Average % of Average

Forecast Period


Quick Links to Current Spatial Conditions

     Soil Moisture
     Snow Water Equivalent
     SNOTEL / ASP(BC)

 

Summary Statistics

Volume Forecast Statistics

The links below present a small set of summary statistics describing the flow forecasts at each location. Currently, the only statistic shown is the forecast percent of average climatological flow (based on 1960-99) at three percentiles: 0.10, 0.50 (median) and 0.90. The statistics refer, for now, to the unconditional and ENSO-conditioned ESP forecast ensembles.

ESP Forecast Pacific Northwest California Colorado Missouri Rio Grande Arkansas-Red Gulf Upper Miss. Mexico
ESP Change Pacific Northwest California Colorado Missouri Rio Grande Arkansas-Red Gulf Upper Miss. Mexico
CPC Forecast Pacific Northwest California Colorado Missouri Rio Grande Arkansas-Red Gulf Upper Miss.
CPC Change Pacific Northwest California Colorado Missouri Rio Grande Arkansas-Red Gulf Upper Miss.

Ensemble Data

ESP Climatology Pacific Northwest California Colorado Missouri Rio Grande
ESP Forecast Pacific Northwest California  Colorado Missouri Rio Grande
CPC Forecast Pacific Northwest California Colorado Missouri Rio Grande
NSIPP Forecast Pacific Northwest California Colorado Missouri Rio Grande

Ensemble Data with split streamflows for April and August

ESP Forecast Pacific Northwest California  Colorado Missouri Rio Grande
WELLS WANAP SWIFT SALMO ROCKY RISLA PFALL PELTO OXBOW NOXON NFORK MURPH MOSSY MERWI MCNAR MAYFI MALHE LMONU LLAKE LGOOS LAGRA JDAYY GROND GORGE GCOUL CONNF CHELA CABIN BRUNE BRILL BOXCA BOUND BONNE BOISE ALBEN CLARK OWYH2 LBOIS CASCA AROCK ANDRA CJSTR BLACK RIRIE IPARK PAYET OWYHE MINAD AMERI HFORK PALIS JLAKE LGRAN HCANY BROWN MILNE DALLE ICEHA DWORS PRIES CHIEF WANET KERRR COLFA HHORS CORRA LIBBY DUNCA ARROW REVEL MICAA TRINI SAC_B N_HOG PRD-C DPR_I OROVI CONSU SHAST FOL_I CLEAR BEARC SMART LK_MC MILLE COTTO N_MEL LCCRN PRALF WTWTS STWBY SRFGR LCDVA GRGRW GRAND LTLFD HRCAN VIRGN MCPHE RDGWY PANIA NAVJO VLCTO TYLPK CRYST MRWPT BLMSA FONTL ALAMO IMPRL PARKR DAVIS HOOVR LESFY BLUFF GREEN RNDLT LILLY MAYBL GRNDL CISCO GRNJC CAMEO GLNWD DELNO ALBUQ CHAMA LOBAT SPAUL JLSBG ROSCO MCOOK TESCO PLNVW BAGNL RILEY HERMN BOONV KSCTY NECTY OMAHA SIOUX FTRND GAVPT OAHE_ GARSN STVLC NPGRW MRFPD GBSRS DBCMT CLPCO SPRSP CHLCO LPCWY NPRGN NPOWY SWAWY SRLWY MBSRW NPSRW NPNCO MRWLT YLWSD PDRLC PDRMH YLWMC TSLMT LBHMT BHSTX SSBBB SSABB NSWWY BRKWY GBMWY WBSWY WRRWY YLWBL CYRMT SABMT BBTMT SRLMT YLWLT YCSMT YYNPW MRMRA MWCIB MRUMT MHLMT MRLDK MRVGL MRSMT CBCMT MRFBT SREFL SFLMT MRTST MDELM MHLGM JFRTF BHMRS BHWSD RRALD BVHBT RRMON CLARE BUREN KAWLK COMRC INDEP DE_KA GAINE TERRL CALVN RALST CANAD AMARI SPEAR LIPSC SHAMR TRUSC SHRVP MUSKO INDEX HASKE RALST ARTHR LITLR NECHE SABGW SABMN ATASC ILLIR DESMN IOWAR WISCR ROOTR CHIPR STCRX MINNR WINON ANOKA ALTON KEOKR JUNTA ANGST AGZLZ HPACA GDLPE PSNCO CUBIL NVLLO PERLA MARIS RICAA TEMAS COLIM GAVIO PADIL CAZAD IXPAL SARDI OVCHI Conch GRAND IMURI BOQUI