Below is zoomed N0B hi-res radar, Wundergages, and adjusted N0B at watersheds.  Note that the raw N0B radar here almost always shows "ground clutter" because of being so close to the radar site. Ground clutter (0.05" to 0.1" a day) is just another simple matter that rain gage adjustment removes.  No rain at the rain gages for the hour then no radar rain.  Beginning Oct 26, 2020 the MRMS radar product A2M is used with out rain gage adjustment.  There isn't a heated gage in the area apparently so I'll try the A2M but results for other locations in the past were pretty bad.  We will see how it does here.  I use both so check the upper left.

GetRealtime can automate gage adjusted radar rainfall and snowmelt for HEC-HMS model and shell HMS and retrieve the HMS output in realtime.  I am NOT experienced with HMS setups for use in real-time for continuous modeling so this is probably more of how my GetRealtime runoff compares to the USGS gage than a very well performed HMS setup comparison.  This study does show that HMS can be used by more experienced HMS modelers so I'll leave that part up to you.  HEC-RAS was also used for comparison with GRT's Muskingum-Gunge and shows Unsteady Flow calcs are needed.

The Slate Creek basin was subdivided into 3 basins and both GRT (GetRealTime) and HMS used the same channel info for Muskingum-Cunge routings.  HMS does not seem to route very well and is probably due to my operater screw ups.  Again, this study shows HOW to operate HEC-HMS in realtime and not very much on how to setup HMS.  I gave it my best shot.  My GRT uses my continuous soil moisture adjsted SCS Curve Number method.  HMS uses just the standard SCS Curve Number of 64 for the 3 subbasins with simple 0.03" leaf loss and monthly ET values for doing HEC stuff to the losses what ever that is.  My GRT model uses the same monthly ET values but distribued on an hourly basis over the year (ET is computed w and w/o gaged Solar for display only here but could have also been used.

Last model run info from database as text each run (GetFromAccessNOW.exe):     

Slate Creek NWS SNOWCAST:

NWS Model Point KS-KM-4 Compared to GRT Using NWS Rain+Snow Precip:

Current NWS snowpack:

NOTE ALL TIMES ARE FOR MY PACIFIC TIME ZONE

Current automated graphs and radar (updated when runoff)

Summary of Snowmelt (Series 1=Blue, Series 2=Pink, Series 3=Orange):

Radar ratio adjusted rainfall and Wundergages (pink is second source referred to)  :

Stage from GRT green, USGS gage pink, & HMS (3rd source HMS is orange):

Subbasin runoff (2nd source is pink, 3rd is orange HEC-RAS routing):

Wundergages and radar ratio adjustment:

Meteorlogical data from Wundergages for snowmelt and evapotranspiration used by GRT:

Snowpack and soil moisture info used by GRT:

Pearson III Annual Peak Flow Probability Distribution:

Past runoff and snowpack comparisons for the 3 subs and routed basin runoff:

Snowpack comparison with NWS snow Feb 2022:

GRT (blue) muskingum-cunge routing comparison to GRT runoff with Hec-Ras (gold) unsteady flow routing (channel slope 4 ft/mi).

Radar A2M Snow Precip and Snowmelt Runoff with Un-heated Rain Gage Delayed Melting:

Rainfall runoff May 24, 2022.  Changed Clark unit graph to Tallapoosa dgf with 55 CN.  Needs a custom DGF from single peak event.  Increased overbank flood flow MCunge N from 0.08 to 0.12 and better matches Hec-RAS.

GetRealtime_Setup.txt Reads:

Database Connection String=Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\GetProjects\GetSlateCr\GetAccess\GetAccessHDB_SlateCr.mdb;User Id=admin;Password=;

Station_ID; Datatype_Site_ID; Datatype_Name; Site_Name; base1; shift1; formula1; base2; shift2; formula2; base3; shift3; formula3

*******; ********; *********; *** FORECASTS *****************

FORECAST-NWS; -11420; Rainfall; FORECAST Slate Cr; -2; 37.372, -97.562, 3

Run-FORECAST-NWS; -11421; Rainfall; FORECAST Sub1 Slate Cr; -2; 37.372, -97.562, 3

FORECAST-NWS; -11422; Rainfall; FORECAST Sub2 Slate Cr; -2; 37.372, -97.562, 3

FORECAST-NWS; -11423; Rainfall; FORECAST Sub3 Slate Cr; -2; 37.372, -97.562, 3

Run-FORECAST-NWS; 17433; Temperature; FORECAST C & J Property, KS; -2; 37.372, -97.562

FORECAST-NWS; 18433; Humidity; FORECAST C & J Property, KS; -2; 37.372, -97.562

FORECAST-NWS; 28433; Wind Speed; FORECAST C & J Property, KS; -2; 37.372, -97.562

FORECAST-NWS; 26433; Cloud Cover; FORECAST C & J Property, KS; -2; 37.372, -97.562

***********; ********; *******:*****SNOWCAST*******; *************

SNOWCAST-NWS,KS-KM-4; 11450,23450; Melt, SWE; Kingman Co., KS 37.4111,-97.4986

Run-SNOWCAST-NWS,KS-KM-4; 17450,-17450; Air Temp, Surface Temp; Kingman Co., KS

SNOWCAST-NWS,KS-KM-4; 10450,-10450; Rainfall, Snowfall; Kingman Co., KS; 0; 0; P1+P2

COMPUTE-Hour; 10453; Rain/melt; NWS Precip Adjust Snowcast Melt; P1=0; 0; P3; P1>0; 0; P2

*******; ********; *********; *** RADAR *****************

A2M-ICT; -10421; Rainfall; Sub1 Slate Cr, KS; 0; Nowcast 3, adjust type 3

A2M-ICT; -10422; Rainfall; Sub2 Slate Cr, KS; 0; Nowcast 3, adjust type 3

RUN-A2M-ICT; -10423; Rainfall; Sub3 Slate Cr, KS; 0; Nowcast 3, adjust type 3

A2M-ICT; -10420; Rainfall; Full Slate Cr, KS; 0; Nowcast 3, adjust type 3

A2M-ICT; -10431; Rainfall; Wellington, KS; 0 A2M-ICT; -10432; Rainfall; Schmeidler/burke, KS; 0

A2M-ICT; -10433; Rainfall; C & J Property, KS; 0

A2M-ICT; -10434; Rainfall; Milton, KS; 0

*******; ********; *********; *** HRRR 6Hour*****************

Run-HRR-ICT; -11422; Forecast Rain; FORECAST Sub2 Slate Cr; 0; 6

*******; ********; *********; *** Wundergages *****************

KKSWELLI10; 10431; Precip; Wellington, KS

KKSMAYFI3; 10432; Precip; Schmeidler/burke, KS

KKSMILTO3; 10434; Precip; Milton, KS

KKSMILTO3; 17433; Temperature; C & J Property, KS

KKSMILTO3; 18433; Humidity; C & J Property, KS

KKSMILTO3; 28433; Wind Speed; C & J Property,

KS KKSCONWA4; 10433; Precip; C & J Property,

KS KKSCONWA4; 29433; Solar Radiation; C & J Property, KS; 0; 0; 2.065*P1

*******; ********; *********; *** COMPUTE WEATHER *****************

COMPUTE; -29433; Solar Radiation; C & J Property, KS; 0; 37.372, -97.562,-90, 1400

COMPUTE; -29443; Long Radiation; C & J Property, KS; 0

COMPUTE; 27433; Ettall; W/solar C & J Property, KS; 0; 37.372, -97.562,-90, 1400, 1; P5

COMPUTE; -27433; ET Alfalfa; C & J Property, KS; 0; 37.372, -97.562,-90, 1400,1; P4

 *******; ********; *********; *** RATIOS *****************

COMPUTE-Hour; 10430; Rainfall; Buck Meadows Avg of 4 Rain Gages; 0; 0; (P1+P2+P3+P4)/N

COMPUTE-Hour; -10430; Rainfall; Buck Meadows Avg of 4 Radars; 0; 0; (P1+P2+P3+P4)/N

Run-COMPUTE-Hour; 31427; Ratio; Buck Meadows, Ca Gage/dax; 0; .02, 1, 4; P1/P2

*******; ********; *********; *** ADJ RADAR *****************

COMPUTE-5unit; -11420; Rainfall; Slate Cr Basin Adjusted DAX Radar; 0; -1, 1,0.25, 0.80; P1*P2

COMPUTE-5unit; -11421; Rainfall; Sub1 Slate Cr, KS Adjusted DAX Radar; 0; -1, 1,0.25, 0.80; P1*P2

COMPUTE-5unit; -11422; Rainfall; Sub2 Slate Cr, KS Adjusted DAX Radar; 0; -1, 1,0.25, 0.80; P1*P2

Run-COMPUTE-5unit; -11423; Rainfall; Sub3 Slate Cr, KS Adjusted DAX Radar; 0; -1, 1,0.25, 0.80; P1*P2

*******; ********; *********; *** Basin Snowmelt *****************

SNOWMELT-Unit; 11420,-23420; Melt, SWC; Slate Cr Snowmelt; 0; 0, 1, 1.15, 1, 1, 1, 1, 32

SNOWMELT-Unit; 11421,-23421; Melt, SWC; Sub1 Slate Cr, KS Snowmelt; 0; 0, 1, 1.15, 1, 1, 1, 1, 32

SNOWMELT-Unit; 11422,-23422; Melt, SWC; Sub2 Slate Cr, KS Snowmelt; 0; 0, 1, 1.15, 1, 1, 1, 1, 32

SNOWMELT-Unit; 11423,-23423; Melt, SWC; Sub3 Slate Cr, KS Snowmelt; 0; 0, 1, 1.15, 1, 1, 1, 1, 32

*******; ********; *********; *** Point Snowmelt *****************

COMPUTE-Hour; 11451; Rain/melt; Adjust NWS Melt Kingman Co., KS; P1=0; 0; P3; P1>0; 0; P2

SNOWMELT-hour; 11453,-23453; Melt, SWC; GRT at NWS Model Point; 0; 0, 1, 1.15, 1, 1, 1, 1, 32

*******; ********; *********; *** Runoff *****************

COMPUTE-5unit; -30420; RUNOFF; Big Cr nr Groveland, Ca Adjmeltn0q; 0; 5, 65, 0.10, 2, 154, 0.4, 0.17, 0.5, 1.5, 0.2, 3.0, 92, 64, 0.95, .2, 1, 0.3, 0.8, 0.03, 1, 0, 0.2, 1, 1, -1, LagV; P1; 0; GreatPlains.DGF

COMPUTE-5unit; -30421; RUNOFF; Sub1 Slate Cr; 0; 9, 70, 0.10, 0, 44.0, 1.67, 0.3, 0, 2.5, 0, 6.0, 94, 69, 0.95, 0.25, 4, 0.3, 0.8, 0.03, 1.0, 0, 0.2, 0, 1, 0, LagV; P1; 0; VillageCreek.DGF

COMPUTE-5unit; -30422; RUNOFF; Sub2 Slate Cr; 0; 9, 70, 0.10, 0, 54.0, 1.67, 0.3, 0, 4, 0, 6.0, 94, 69, 0.95, .25, 4, 0.3, 0.8, 0.03, 1.0, 0, 0.2, 0, 1, 0, LagV; P1; 0; GreatPlains.DGF

COMPUTE-5unit; -30423; RUNOFF; Sub3 Slate Cr; 10; 9, 70, 0.10, 0, 55.8, 1.67, 0.3, 0, 2.5, 0, 6.0, 94, 69, 0.95, 0.25, 4, 0.3, 0.8, 0.03, 1.0, 0, 0.2, 0, 1, 0, LagV; P1; 0; GreatPlains.DGF

Run-Route; -1419; FLOW; Subs 1,2,3; 4 Lookup; -2419; Stage; Slate Creek at Wellington, KS

COMPUTE-hour; -6420; Future Runoff Fraction; Basin Future Fraction Runoff; 0; 0; 0; P2>0.2*P1; 0; 100*(P2-0.2*P1)^2/(P2+0.8*P1)/P2

COMPUTE-hour; -5420; SCS CN; Full Slate Cr Basin; 0; 0; 1000/(P1+10)

*******; ********; *********; ***USGS FLOW STAGE*****************

07145700; 1419; Flow; SLATE C AT WELLINGTON, KS

07145700; 2419; Stage; SLATE C AT WELLINGTON, KS

*******; ********; *********; ***HEC-HMS PROJECT*****************

COMPUTE-Put-unit; 11421; PRECIP-INC; Sub1 Slate Cr, KS; 0; C:\GetProjects\GetSlateCr\HMSProject\NashvilleBasinRainfall.dss

COMPUTE-Put-unit; 11422; PRECIP-INC; Sub2 Slate Cr, KS; 0; C:\GetProjects\GetSlateCr\HMSProject\NashvilleBasinRainfall.dss

COMPUTE-Put-unit; 11423; PRECIP-INC; Sub3 Slate Cr, KS; 0; C:\GetProjects\GetSlateCr\HMSProject\NashvilleBasinRainfall.dsss

SHELL-C:\Program Files\HEC\HEC-HMS\4.5\HEC-HMs.cmd; -1; Flow; Slate Cr HMS; 0; C:\GetProjects\GetSlateCr\HMSProject\Project_2.hms, Control_1.control, Run 1, 5-Minute; delete.log

*******; ********; *********; ***GET HEC-HMS OUTPUT*****************

COMPUTE-get; -1521; Runoff; HMS Sub1 Slate Cr

COMPUTE-get; -1522; Runoff; HMS Sub2 Slate Cr

COMPUTE-get; -1523; Runoff; HMS Sub3 Slate Cr

COMPUTE-get; -1519; Runoff; HMS Basin Outflow

Lookup; -2519; Stage; HMS Slate Creek at Wellington, KS

*******; ********; *********; ***SEND TO WEB PAGE*****************

SHELL-C:\GetProjects\GetSlateCr\GetGraphs\GetFromAccessNOW.exe rdaymax, 10430 -10430 -11420 -10420 -23420 -1519 -1419 1419, -2, 5, SlateCreekNOW.txt, mypassword; 0; Flow Data to Web; Put Flow Data Text File on Web; 0

SHELL-C:\GetProjects\GetSlateCr\GetNexrad\GetNexrad.exe -2 mypassword; 0; Picture; Slate Creek Nexrad Picture; 0

SHELL-C:\GetProjects\GetSlateCr\GetGraphs\GetGraphs.exe 4 mypassword; 0; Graphs; Getgraphs to Web; 0 END

Access table rsite:

Important Note:  Nothing on this page is intended as interpretation of any legal authority such as water rights and supply. This page is intended solely as a demonstration of techniques in flood potential monitoring. The reader assumes all risk for any damages whatsoever in connection with the access, use, quality, or performance of the supplied data just so you know.