NWS Calibration Workshop, LMRFC March, 2009 1

Historical Data Access

Basic Calibration Workshop

March 10-13, 2009

LMRFC

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Historical Data AnalysisGeneral Information Needed

Analysis of PrecipitationInformation needed

Non Mountainous Mountains

PXPP

1 check consistency2 compute monthy means

MAP

1 recheck consistency2 generate time series of MAP

MAT

TAPLOT

MAT

MAPE

1. Station data2. Station history info: obs times, changes, location, moves3. Topographic data

1 isohyetal map2 station weights-basin boundary

Mountains

- check consistency

- get mean max/min for mean zone elev.

- generate time series of MAT.

- area vs elev. curve-basin boundary

1 evaporation maps2 station weights3 mean monthly evap.

1 check consistency2 generate daily time series of MAPE

- evap. vs elev. curve

Non Mountainous Non Mountainous Mountains

-compute 12monthy ETdemand values

Analysis of TemperatureInformation needed

Analysis of EvaporationInformation needed

MAPX1. ‘Poor man’s” reanalysis

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Sources of Data for Calibration• National Climatic Data Center (NCDC)

– Hourly precipitation (thru Feb, 2008 for legacy programs, 2005 for Browser)– Daily precipitation (through May, 2008 for legacy programs, 2005 for Browser)– Max, min temperature– Snow on Ground – Synoptic Data– Evaporation data.

• U.S. Geological Survey (USGS)– Mean daily flow– Peak flow– Lake elevation– Pool elevation– Storage– Measurements (note: recently removed due to concerns)

– Hourly Discharge (provisional) http://ida.water.usgs.gov/ida/

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Sources of Data for Calibration, cont’d

• RFC Archives from NOAA Hydrologic Data System– NEXRAD– OFS Processed Data Base (PRD)– Point data and other Postgres data

• RFC Archived Data Base• Natural Resources Conservation Service

(NRCS)– Snotel data

• IFLOWS (higher elevation data)

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Accessing Data for Calibration

• Legacy programs on NHDS web site– Station Inventory– Daily Transfer– Hourly Transfer– Syntran (evaporation data)

• Historical Data Browser (HDB)– GUI replacement of legacy programs

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Meta Data(station inventory,history, on flat file,

2008)

OHD RFC

Data on NOAA1 Server (2008)

Meta Data(station inventory, history)

on Postgres ‘OB9_Histdata’, to1999, soon to be updated

Web AccessLegacy programs(stand alone)

Historical Data Browser(AWIPS)

FTP

Historical Data Access for CalibrationData Flow: Current System

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Accessing Data for Calibration

• In future we hope to have:– Updated Calibration System within CHPS

• Incorporate – CAP– ICP– OPT3– HDB– GIS

– Access to NCDC and USGS directly

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Station History Information

• No source is complete

• New on-line resource: scanned versions of all NCDC B-44 forms reporting station information– Contact Cynthia.B.Karl@noaa.gov at NCDC– www.noaa.imcwv.com

• metadata– cooperative station history forms– Document Coop Station Id Number ‘094648’

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RFC Data

• A recent request for old NWSRFS data triggered an effort to retrieve all archived NWSRFS data for the period from 1996-Sept 2005. The data has been extracted from tape and placed on an OHD server. An inventory of NWSRFS files was then created on a RFC-by-RFC basis and can be found at: http://amazon.nws.noaa.gov/hdsb/data/nwsrfs/nwsrfs.html.

• If you would like to request any old NWSRFS data, please email your request to nhdsinfo@gateway2.nws.noaa.gov.