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Alternative Data and Forecast Products, Listed by Data Source
This page gives some alternative data and forecast sources for precipitation, temperature, dewpoint temperature, solar radiation, and wind data to replace data from Argonne National Laboratory for use in the USGS - Du Page County Salt Creek Flood-Simulation System when Argonne data are unavailable, and to supplement the standard forecast methodology used in that simulation system. There are two versions of this page: one version organized by data or forecast source and one organized by the weather parameter being sought. This page is organized by data source. The delivery of weather data and forecasts by government and private entities is continually evolving; therefore, please contact the Maintainer of this page if links appear to be incorrect or if other sources should be added.
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Disclaimer: |
| The data and forecasts to which links are provided on these pages are not produced or quality-controlled by the US Geological Survey, and no official endorsement is implied. Users should exercise caution regarding the accuracy of these data and forecasts, and utilize them at their own risk. |
I. Past Weather Data
| Primary Backup (All Parameters): | |
| Title/URL | Description |
| WARM/ICN - St. Charles - Hourly | Parameters: All Lag Time: 1-2 days Access: email Bob Scott (r-scott5@uiuc.edu) |
| WARM/ICN - St. Charles - Daily http://www.sws.uiuc.edu/warm/datatype.asp |
Parameters: All Lag Time: Up to 1 month Access: Click on 'Monthly Data' (easier to read) or '2002' (more up-to-date) |
| Secondary Backup (All Parameters except Solar Radiation): | |
| Parameters: All
parameters except Solar Radiation Lag Time: Less than 1 hour Time Res.: 1 hour Use: Choose date next to "Historical" under "Conditions" bar and click "Go". |
|
| Other Sources:
Precipitation: NEXRAD |
|
| Title/URL | Description |
| KLOT Radar Images | Lag Time: 5-10 minutes Time Res.: 5 minute to 1 hour |
| KLOT Digital DPA (under construction) | Lag Time: 5-10 minutes Time Res.: 5 minute to 1 hour |
| NCRFC MPE Images http://www.crh.noaa.gov/cgi-bin-ncrfc/uncgi/s3hr |
Lag Time: 6-12 hours Time Res.: 1 hour |
| NCRFC Digital MPE (under construction) | Lag Time: 6-12 hours Time Res.: 1 hour |
| Other Weather (Temp., Dewpoint/RH, Radiation/Cloud Cover, Wind) | |
| Title/URL | Description |
| Accuweather 'Past 24 Hours'
Stations: |
Parameters: Temp., RH, Pressure, Wind,
Visibility, Weather type
Lag Time: Less than 1 hour Time Res.: 1 hour (higher during storms) Use: After selecting station, click on 'Past 24 hours' from menu on left. |
| NWS Current
Weather Conditions
Stations: |
Parameters: Temp., Dewpoint, Pressure, Wind
Lag Time: Less than 1 hour Time Res: 1 hour Use: Select station on left. |
|
Accuweather 'Past Year' Stations: |
Parameters: Min/Max Temp., Precip.
Lag Time: Less than 1 day Time Res.: 1 day Use: After selecting station, click on 'Past Year' from menu on left. |
| MRCC / MICIS http://mcc.sws.uiuc.edu/index.html |
Parameters: Hourly: Temp., Dewpoint/RH, Pressure, Wind Daily: Solar radiation, PET Lag Time: 1-2 days Access: through paid subscription account |
II. Forecasts
| Title/URL | Description |
| Accuweather | Parameters: Precip., Temp., Dewpoint/RH, Wind, Cloud cover,
Wx
Max. Lead Time: 48 hours Time Res.: 1 hour Use: Click on 'Hourly Forecasts' from menu on left Notes: Unlike past weather, Accuweather forecasts are different even for nearby locations |
| WSFO Chicago
Graphical: http://www.crh.noaa.gov/ifps/ifps.php?site=lot Text: http://www.crh.noaa.gov/lot/forecasts/rdf.txt |
Parameters: Temp. Dewpoint, Wind, Wx, PoP |
| MOS (Model Output Statistics) Forecasts http://www.nws.noaa.gov/mdl/synop/products.htm |
Parameters: Precip., Temp., RH, Wind, Sky
cover/vis./ceiling, Severe weather
Max. Lead Time: 48-192 hours Time Res.: 3-24 hours Notes: See 'description' links for descriptions. Some products are experimental. Link for NWP model descriptions: http://www.srh.noaa.gov/ftproot/ ssd/nwpmodel/html/nwplinks.htm |
| NCRFC Flash Flood Guidance http://www.crh.noaa.gov/ncrfc/html_frames/floodindex.html |
Definition: Depth of rain over 1, 3, or 6 hours needed to induce flash flooding Choices: Text (point) or Graphical (aerially averaged) estimates In text tables, points of interest may be: WSP2: Salt Creek at Western Springs |
| Experimental 0-3 Hour Convective Weather Forecast Products http://www.nws.noaa.gov/tdl/scan/scan_svr_03h.htm |
Description: Experimental short-term forecasts of convective weather and precipitation depth |
III. Distribute daily solar radiation to hourly (in *.hsp format)
IV. Conversions
Precip. Depth
Millimeters (mm) to Inches (I) :
I = mm / 25.4
Temperature
Degrees Celsius (oC) to degrees Fahrenheit (oF) :
oF = (9 / 5) * oC + 32
Dewpoint / Relative Humidity
Relative Humidity (RH) and Temperature in oF (oF) to Dewpoint Temperature in oF (DTF) :
1) Compute saturation vapor pressure (esat) in millibars (mb) by
esat = 6.11 * exp ( 17.3 T / (T+237.3) ), where T is temperature in oC
2) Compute vapor pressure (e) in mb by
e = RH * esat.
3) Compute Dewpoint temperature Tdew in oC by
Tdew = ( ln(e) - 1.810) / ( 0.0805 - 0.00421 ln(e) ).
4) Convert Tdew from oC to oF using temperature conversion above.
Reference: S.L. Dingman (1994), Physical Hydrology, Prentice-Hall, p. 516-517.
Wind
Knots (KT) to miles per hour (MPH) :
MPH = 1.1508 * KT
Meters per second (MPS) to MPH :
MPH = 2.2369 * MPS
Solar Radiation
Return to the USGS-DuPage County Flood-Simulation System for Salt Creek web pages.MegaJoules / sq. meter (MJ/m2) to Langleys (L) :
L = 23.88 * (MJ/m2)
Watts / sq. meter (W/m2) to Langleys / hour (LPH) :
LPH = 0.08598 * (W/m2)